Science.gov

Sample records for impacts involving porous

  1. Drop impact on natural porous stones.

    PubMed

    Lee, J B; Derome, D; Carmeliet, J

    2016-05-01

    Drop impact and spreading on three natural porous stones are experimentally determined using high-speed imaging and compared with spreading over an impermeable steel surface. The dynamic non-wetting behavior during spreading and the hydrophobic contact angle >90° is attributed to the presence of an air layer between the droplet and the porous substrate. As the contact line pins at maximum spreading on the porous stone, the maximum spreading determines the liquid contact area on such substrate. The droplet gets pinned when the air layer is broken at the contact line and capillary forces develop in fines pores at the droplet edge, pinning the droplet. Maximum spreading on porous stones increases with impact velocity but does not scale with Weber number at low impact velocity. It is demonstrated that dynamic wetting plays an important role in the spreading at low velocity and that the dynamic wetting as characterized by the dynamic contact angle θD has to be taken into account for predicting the maximum spreading. Correcting the maximum spreading ratio with the dynamic wetting behavior, all data for porous stones and non-porous substrate collapse onto a single curve.

  2. Droplet impact on a porous substrate: a capillary tube model

    NASA Astrophysics Data System (ADS)

    Ding, Hang; Theofanous, Theo

    2009-11-01

    The dynamics of impacting (spreading, penetrating) a droplet on a porous substrate, modeled by an array of capillary tubes, is studied numerically using diffuse interface methods. The absorption rate depends on the diameter ratio of the capillary tube to the droplet, wettability, and liquid properties. The flow dynamics is resolved by solving the Navier-Stokes equations and interface capturing is governed by the Cahn-Hilliard equation. Contact-angle hysteresis is included (Ding&Spelt 2008) and the stress singularity at moving contact lines is relieved using a diffuse interface model (Seppecher 1996; Jaqcmin 2000). The model is validated by studying the evolution of a droplet initially resting on a porous substrate and by comparison to drop-impact experiments involving just one capillary tube (Kogan et al 2008). Comparisons with analytical solutions and results available in the literature (e.g. Hilpert & Ben-David 2009) are presented. Through parametric simulations over relevant ranges of Reynolds and Ohnesorge numbers and contact angles, impact regime maps are derived.

  3. Impact ionization experiments with porous cosmic dust particle analogs

    NASA Astrophysics Data System (ADS)

    Sterken, Veerle; Moragas-Klostermeyer, Georg; Hillier, Jon; Fielding, Lee; Lovett, Joseph; Armes, Steven; Fechler, Nina; Srama, Ralf; Bugiel, Sebastian; Hornung, Klaus

    2016-04-01

    Impact ionization experiments have been performed since more than 40 years for calibration of cosmic dust instruments using a linear Van de Graaff dust accelerator. Such an accelerator can accelerate conductive dust particles of sizes between ca. a few tens of microns, and a micron in size to speeds up to 80 km/s depending on particle size. Many different materials have been used for instrument calibration, from iron in the earlier days to carbon, metal-coated minerals and most recently, minerals coated with conductive polymers. While different materials with different densities have been used for instrument calibration, no comparative analysis has been made yet of compact particles versus porous or fluffy particles of the same material. Porous or fluffy particles are increasingly found to be present in the solar system, e.g. dust from comet 67P Churyumov-Gerasimenko or aggregate grains from the plumes of Enceladus and recently also indications were found for low-density interstellar dust (ISD) from ISD data and trajectory simulations. These recalibrations are thus relevant for estimations of the size distributions of interplanetary and interstellar dust. In this talk we report about the calibrations being performed at the Heidelberg dust accelerator facility for investigating the influence of particle density on the impact ionization charge after impact. We use the Cassini Cosmic Dust Analyser as an impact target. We then explain the experiment set-up, the preparation of the materials and the materials used. We elaborate on the technical challenges, and finally about the current status of the research at this stage. We conclude the talk with the relevance of the study, being the potential influence of such calibrations on the estimates of the mass distributions of interstellar and interplanetary dust.

  4. Impact cratering and catastrophic disruption of porous targets through hypervelocity impact experiments

    NASA Astrophysics Data System (ADS)

    Ferri, F.; Giacomuzzo, C.; Pavarin, D.; Francesconi, A.; Bettella, A.; Flamini, E.; Angrilli, F.

    We present an experimental study of impact cratering and fragmentation processes onto low density materials by means of high velocity impact experiments using a two-stage light-gas gun, the impact facility of CISAS "G. Colombo" of the University of Padova (http://cisas.unipd.it/lgg/lgg.html). The goal of our experiments is to obtain a better comprehension of the impact processes on different materials in order to analyze the evolution of the surface of the solid bodies and the collisional evolution of the minor bodies of the Solar System. The results of this research are also aimed to contribute to the data interpretation of the ground- and space-based observations, in particular in view of space missions such as Smart1, MarsExpress, VenusExpress, BepiColombo, Cassini-Huygens, Rosetta, Dawn. Porosity is an important physical characteristic of the minor bodies, affecting their behaviour during cratering and greatly lengthening the collisional lifetimes of porous asteroids. Porous targets are likely to have average sound velocity lower than those of nonporous targets composed of same material; compaction of initially porous materials can produce rapid attenuation of the shock, thus affecting energy propagation during collisions. Therefore we focus on the study of impact processes on porous targets both by experimental and theoretical approach in order to complement and extend the available data to ranges of velocity and physical conditions not yet explored. In order to simulate porous asteroids, comets, icy satellites, we have manufactured and used targets of different material, e.g. glass ceramic foam, natural pumices, water ice, and different porosity (with density ranging from 0.35 to 1.07 g/cm3 ). Impact test campaign have been performed on the different samples varying the impact kinetic energy (by changing projectile mass and velocity) in order to study the craterization up to catastrophic disruption. The impact and shattering events are observed by high speed

  5. Numerical Modeling of Ink-droplet Impact on Porous Substrate

    NASA Astrophysics Data System (ADS)

    Hosseini, Saman; Ashgriz, Nasser; Chandra, Sanjeev; Andrews, John; Droppel, Stephan; Xerox Corporation

    2011-11-01

    Solid ink is wax-resin based ink, which is solid at room temperature, and melts when heated. Impact of a solid ink droplet with different velocities and temperatures on paper is studied. Maximum spreading diameter of solid ink ``Colorstix8200'' on different papers has been evaluated. Increasing the temperature decreases the viscosity of the wax, which causes more spreading and penetration on the paper. Although lateral spreading is very rapid during the initial stages of impact, drop may penetrate inside the substrate too. Dynamically, wax penetration on paper is a function of inertia, surface tension and capillary pressure inside the paper. When a wax drop penetrates into the paper, it mechanically bonds to the paper through anchoring within the pores. After the impact, droplets are removed and remaining areas are measured for adhesion and cohesion characteristic. The adhesion of solid ink to paper has been studied qualitatively using scratch test and tape test techniques. The experimental setup consists of a pendent droplet generator which consists of heated cylinder for molten wax and a nozzle; imaging system, pull test system, and cutting system. Penetration, spreading and adhesion force have been studied for different temperatures and impact velocities on porous substrate.

  6. Experimental study on impact disruption of porous asteroids: Effects of oblique impact and multiple collisions on impact strength

    NASA Astrophysics Data System (ADS)

    Yasui, Minami; Takano, Shota; Matsue, Kazuma; Arakawa, Masahiko

    2015-08-01

    Most of asteroids would have pores and a plenty of pre-cracks in their interiors, and the pre-cracks could be formed by multiple impacts at various impact angles. Porosity and pre-cracks are important physical properties controlling the impact strength. Okamoto and Arakawa (2009) did impact experiments of porous gypsum spheres to obtain the impact strength of porous asteroids, but they carried out only single impact experiments on the same target at head-on. In this study, we conducted oblique impact and multiple impacts on porous gypsum and examined the effects of impact angle and pre-cracks on the impact strength.We carried out impact experiments by using the one-stage He gas gun and the two-stage H2 gas gun at Kobe University. The impact velocities were <200 m/s (low-vi) and >3 km/s (high-vi). Targets were porous gypsum spheres with the porosity of 55% and the diameters of 7 or 12 cm. The projectiles were a porous gypsum sphere with the diameter of 2.5 cm at low-vi or a polycarbonate sphere with the diameter of 4.7 cm at high-vi. The impact angle changed from 15° to 90°, and the projectile was impacted on the same target for 2-15 times. The impact phenomena were observed by a high-speed digital video camera to measure the fragment velocities.The oblique impact experiments showed that the impact strength did not depend on the impact angle θ between 45° and 90°, and obtained to be ~2000 J/kg, while it drastically changed at the θ from 15° to 30°. We reanalyzed our results by using the effective energy density defined as Qsin2θ, where Q is the energy density, and found that most of the results were consistent with the results of head-on impacts. The multiple impacts showed that the impact strength of pre-impacted targets was larger than that of intact targets in the case of low-vi. This might be caused by the compaction of the target surface. In the case of high-vi, the impact strength of pre-impacted targets was smaller than that of intact targets. This

  7. Impact of saturation on dispersion and mixing in porous media

    NASA Astrophysics Data System (ADS)

    Jimenez-Martinez, J.; De Anna, P.; Turuban, R.; Tabuteau, H.; Le Borgne, T.; Meheust, Y.

    2014-12-01

    In partially saturated porous media, the spatial distribution of wetting (e.g., water) and non-wetting (e.g., air) phases causes the liquid flow to be focused onto narrow and complex flow paths, leaving large volumes of wetting fluid trapped in between non-wetting phase clusters. The impact of the resulting highly heterogeneous wetting fluid velocity distributions on the dispersion and mixing of a solute in this wetting phase is critical for predicting reactive transport processes that take place in partially saturated porous media. We study the dependence of dispersion and mixing on the saturation degree using a 2D experimental setup consisting of cylindrical grains built using soft lithography. The joint injection of the two phases (wetting and non-wetting) provides a controlled homogeneous saturation in the medium. The simultaneous measurement of the flow velocity field, the spatial distribution of the wetting and non-wetting phases, and the tracer concentration field are used to investigate the relationship between the flow field complexity induced by desaturation and dispersion/mixing properties. We analyze the temporal behavior of the mean concentration gradient and the scalar dissipation rate, which quantify the temporal variation of the concentration variability and the potential for mixing-controlled chemical reactivity. The formation of preferential flowpaths in unsaturated flows is found to have an important impact on the mixing behavior. While the mean concentration gradient decays in time for saturated flow following the classical diffusive smoothing of concentration gradients, the creation of highly channelized finger structures in unsaturated flows induces persistently large concentration gradients which decay slowly in time. The highly resolved concentration field images show that this effect is due to i) a drastic increase of the surface available for creating concentration gradients across the finger boundaries, ii) the existence of dead-ends with

  8. [The impact of socially involved films].

    PubMed

    Mimoun, M

    1979-01-01

    During the past few years studies on linguistics and particularly on semiology have considerably renewed the approach and investigation methods in artistic expression. Ideology has several languages and expression systems (photography, painting, music, speech, architecture and so on). The film does not only carry an ideological content: besides the signification systems and the signs taken from other means of films. To consider only films which have the ostensible objective to urge the public to a political action as socially involved is wrong: any movie is socially involved. One must appreciate correctly and politically the place, role and level at which it intervenes in the framework of the ideological fight. Audiovisual alphabetization is essential for the progress of new ideas in the field of picture and sound. In the Third World, when they do exist, cinematographies rarely have the political power to consider such an action. Ideological impact depends mostly on the social, political and cultural environment. A movie is 1st questioned from the standpoint of the historical place and of the problems of the public. The example of Algerian cinematography as a socially involved one is given. At its origin, film-making in this country was working at informing the outside world of the meaning of the people's fight. Its goal was to capture the political and social reality in order to change it. Therefore the social involvement role of Algerian film-producing is tightly connected to the revolutionary process in which the whole country is engaged. Algerian film-producing is often understood as a propaganda cinematography. The stagnation or progress of a cinematography cannot be measured in relation to the universal mythical culture, but in relation to the social and cultural reality of the country where it originates. The present deepening of the reflection on film and ideology is a result of a recent accentuation of the ideologic fight. PMID:12261392

  9. [The impact of socially involved films].

    PubMed

    Mimoun, M

    1979-01-01

    During the past few years studies on linguistics and particularly on semiology have considerably renewed the approach and investigation methods in artistic expression. Ideology has several languages and expression systems (photography, painting, music, speech, architecture and so on). The film does not only carry an ideological content: besides the signification systems and the signs taken from other means of films. To consider only films which have the ostensible objective to urge the public to a political action as socially involved is wrong: any movie is socially involved. One must appreciate correctly and politically the place, role and level at which it intervenes in the framework of the ideological fight. Audiovisual alphabetization is essential for the progress of new ideas in the field of picture and sound. In the Third World, when they do exist, cinematographies rarely have the political power to consider such an action. Ideological impact depends mostly on the social, political and cultural environment. A movie is 1st questioned from the standpoint of the historical place and of the problems of the public. The example of Algerian cinematography as a socially involved one is given. At its origin, film-making in this country was working at informing the outside world of the meaning of the people's fight. Its goal was to capture the political and social reality in order to change it. Therefore the social involvement role of Algerian film-producing is tightly connected to the revolutionary process in which the whole country is engaged. Algerian film-producing is often understood as a propaganda cinematography. The stagnation or progress of a cinematography cannot be measured in relation to the universal mythical culture, but in relation to the social and cultural reality of the country where it originates. The present deepening of the reflection on film and ideology is a result of a recent accentuation of the ideologic fight.

  10. Using bacterial bioluminescence to evaluate the impact of biofilm on porous media hydraulic properties.

    PubMed

    Bozorg, Ali; Gates, Ian D; Sen, Arindom

    2015-02-01

    Biofilm formation in natural and engineered porous systems can significantly impact hydrodynamics by reducing porosity and permeability. To better understand and characterize how biofilms influence hydrodynamic properties in porous systems, the genetically engineered bioluminescent bacterial strain Pseudomonas fluorescens HK44 was used to quantify microbial population characteristics and biofilm properties in a translucent porous medium. Power law relationships were found to exist between bacterial bioluminescence and cell density, fraction of void space occupied by biofilm (i.e. biofilm saturation), and hydraulic conductivity. The simultaneous evaluation of biofilm saturation and porous medium hydraulic conductivity in real time using a non-destructive approach enabled the construction of relative hydraulic conductivity curves. Such information can facilitate simulation studies related to biological activity in porous structures, and support the development of new models to describe the dynamic behavior of biofilm and fluid flow in porous media. The bioluminescence based approach described here will allow for improved understanding and control of industrially relevant processes such as biofiltration and bioremediation. PMID:25479429

  11. Impacts of Transport Properties of Porous Corrosion Product Layer on Effective Corrosion Rate

    NASA Astrophysics Data System (ADS)

    Li, Xiaobai; Cook, David

    2012-11-01

    Condensing exhaust gases containing H2O, SO3 and NOx cause serious corrosion failure in various industry processes. For example, in modern compact heat cells, corrosion products deposit on top of the heat exchanger cooling fins, blocking the flow passages and drastically decreasing system performance. The transport properties of porous corrosion product layers play important role in determining the corrosion tendency and observed corrosion rate. To understand the corrosion mechanism for Aluminum alloy in sulfuric acid environment, impacts of transport properties of corrosion residual layers are investigated with different numerical models for porous layer diffusivity. The effective corrosion rates resulted from these models are compared to corresponding experimental measurements. A multilayer diffusivity model in which diffusivity depends both on porous layer structure and composition shows excellent agreements with experimental data. This model is currently being used in a multi-scale flow simulation framework to predict corrosion phenomena in heat cells.

  12. Protective Effectiveness of Porous Shields Under the Influence of High-Speed Impact Loading

    NASA Astrophysics Data System (ADS)

    Kramshonkov, E. N.; Krainov, A. V.; Shorohov, P. V.

    2016-02-01

    The results of numerical simulations of a compact steel impactor with the aluminum porous shields under high-speed shock loading are presented. The porosity of barrier varies in wide range provided that its mass stays the same, but the impactor has always equal (identical) mass. Here presented the final assessment of the barrier perforation speed depending on its porosity and initial shock speed. The range of initial impact speed varies from 1 to 10 km/s. Physical phenomena such as: destruction, melting, vaporization of a interacting objects are taken into account. The analysis of a shield porosity estimation disclosed that the protection effectiveness of porous shield reveals at the initial impact speed grater then 1.5 km/s, and it increases when initial impact speed growth.

  13. High Velocity Impact Interaction of Metal Particles with Porous Heterogeneous Materials with an Inorganic Matrix

    NASA Astrophysics Data System (ADS)

    Glazunov, A. A.; Ishchenko, A. N.; Afanasyeva, S. A.; Belov, N. N.; Burkin, V. V.; Rogaev, K. S.; Tabachenko, A. N.; Khabibulin, M. V.; Yugov, N. T.

    2016-03-01

    A computational-experimental investigation of stress-strain state and fracture of a porous heterogeneous material with an inorganic matrix, used as a thermal barrier coating of flying vehicles, under conditions of a high-velocity impact by a spherical steel projectile imitating a meteorite particle is discussed. Ballistic tests are performed at the velocities about 2.5 km/s. Numerical modeling of the high-velocity impact is described within the framework of a porous elastoplastic model including fracture and different phase states of the materials. The calculations are performed using the Euler and Lagrange numerical techniques for the velocities up to 10 km/s in a complete-space problem statement.

  14. Antipodal fragment velocities for porous and weak targets at catastrophic impacts

    NASA Astrophysics Data System (ADS)

    Yanagisawa, M.; Itoi, T.

    1993-03-01

    Mortar, porous alumina, and sand targets, which were spherical in shape and from 11 to 15 cm in diameter, were impacted normally by plastic (polycarbonate) projectiles of nearly 1 g in mass at velocities about 6 km/s. Fragment velocity at the antipole of impact site (antipodal velocity, V(sub a)), for each experiment, was obtained from two Flash X-ray images recorded prior to and at predetermined delayed time after impact event. It has been revealed that the velocities for the same E/M(sub t) (impact energy divided by target mass) depend strongly on target material, and differ about an order of magnitude between the sand and basalt.

  15. Antipodal fragment velocities for porous and weak targets at catastrophic impacts

    NASA Technical Reports Server (NTRS)

    Yanagisawa, M.; Itoi, T.

    1993-01-01

    Mortar, porous alumina, and sand targets, which were spherical in shape and from 11 to 15 cm in diameter, were impacted normally by plastic (polycarbonate) projectiles of nearly 1 g in mass at velocities about 6 km/s. Fragment velocity at the antipole of impact site (antipodal velocity, V(sub a)), for each experiment, was obtained from two Flash X-ray images recorded prior to and at predetermined delayed time after impact event. It has been revealed that the velocities for the same E/M(sub t) (impact energy divided by target mass) depend strongly on target material, and differ about an order of magnitude between the sand and basalt.

  16. Propagation of impact-induced shock waves in porous sandstone using mesoscale modeling

    NASA Astrophysics Data System (ADS)

    GÜLdemeister, Nicole; WÜNnemann, Kai; Durr, Nathanael; Hiermaier, Stefan

    2013-01-01

    Abstract-Generation and propagation of shock waves by meteorite <span class="hlt">impact</span> is significantly affected by material properties such as porosity, water content, and strength. The objective of this work was to quantify processes related to the shock-induced compaction of pore space by numerical modeling, and compare the results with data obtained in the framework of the Multidisciplinary Experimental and Modeling <span class="hlt">Impact</span> Research Network (MEMIN) <span class="hlt">impact</span> experiments. We use mesoscale models resolving the collapse of individual pores to validate macroscopic (homogenized) approaches describing the bulk behavior of <span class="hlt">porous</span> and water-saturated materials in large-scale models of crater formation, and to quantify localized shock amplification as a result of pore space crushing. We carried out a suite of numerical models of planar shock wave propagation through a well-defined area (the "sample") of <span class="hlt">porous</span> and/or water-saturated material. The <span class="hlt">porous</span> sample is either represented by a homogeneous unit where porosity is treated as a state variable (macroscale model) and water content by an equation of state for mixed material (ANEOS) or by a defined number of individually resolved pores (mesoscale model). We varied porosity and water content and measured thermodynamic parameters such as shock wave velocity and particle velocity on meso- and macroscales in separate simulations. The mesoscale models provide additional data on the heterogeneous distribution of peak shock pressures as a consequence of the complex superposition of reflecting rarefaction waves and shock waves originating from the crushing of pores. We quantify the bulk effect of porosity, the reduction in shock pressure, in terms of Hugoniot data as a function of porosity, water content, and strength of a quartzite matrix. We find a good agreement between meso-, macroscale models and Hugoniot data from shock experiments. We also propose a combination of a porosity compaction model (ɛ-α model) that was</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014AGUFM.H13A1061H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014AGUFM.H13A1061H"><span id="translatedtitle">The Efficiency Analysis of Low <span class="hlt">Impact</span> Development Applied in Taiwan: A Case Study of <span class="hlt">Porous</span> Pavement</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Huang, Y. H.; Liu, H. J.; Hsu, N. S.; Chang, F. M.</p> <p>2014-12-01</p> <p>Low <span class="hlt">Impact</span> Development (LID) has been developed since the end of 1990s. Lots of successful experience based on this new technology have been made. Taiwan Executive Yuan is conducting a six-year (2014~2019) program "Integrated River Basin Management Plan" applying LID to build sponge cities. Construction and Planning Agency, Ministry of the Interior is editing the manual of LID technology for Taiwan. However, since the hydrological environments, physiographic conditions, climates, the strength and frequency of disasters in Taiwan are different from that in America, this study takes the first laboratory experiment and model simulation to evaluate the efficiency of application of LID in Taiwan.LID Facilities includes <span class="hlt">porous</span> pavement, rain garden, green roof, tree box filter facilities and so on, and in this study, <span class="hlt">porous</span> pavement is taken as an example for discussion. In the part of laboratory experiments, the sand box experiments is designed to operate with the specified rainfall return period calculated by Horton formula and rainfall characteristics of Taipei. Then the outflow hydrograph in each designed rainfall of specified return period can be evaluated. As for model simulation, this study constructs LID simulation elements by SWMM model and tests the suitability for simulation of the outflow hydrograph obtained from experiments, and definitely quantifies the efficiency of water retention and flood reduction of <span class="hlt">porous</span> pavement. The results fits well with the experimental observation data with less than 10% error of pick flow. It suggests that, with LID simulation elements constructed in this study, the efficiency of LID in actual on-site application can be evaluated.The results shows that <span class="hlt">porous</span> pavement is able to delay arrival time of pick about 5% ~10% and reduce the pick flow about 5%~20%, and hold the ability of near 3~5% water retention. It proves that application of LID can retain water and reduce flood in Taiwan.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26275609','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26275609"><span id="translatedtitle">Psychosocial <span class="hlt">impact</span> of <span class="hlt">involvement</span> in the Special Olympics.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Crawford, Clare; Burns, Jan; Fernie, Bruce A</p> <p>2015-01-01</p> <p>Existing evidence suggests that people with intellectual disabilities are vulnerable to low self-esteem leading to additional psychosocial issues such as social exclusion and stress. Previous research into the <span class="hlt">involvement</span> of Special Olympics (SO) of people with intellectual disabilities has indicted positive psychosocial outcomes. <span class="hlt">Involvement</span> in sport is known generally to have psychological and social benefits. This study aimed to compare the psychosocial <span class="hlt">impact</span> of <span class="hlt">involvement</span> in sport through the SO to no or limited sports <span class="hlt">involvement</span>, for a sample of people with intellectual disabilities. A cross sectional design was employed comparing three groups, SO, Mencap Sports, and Mencap No Sports on the variables: Self-esteem, quality of life, stress levels and social networks. One hundred and one participants were recruited either through the SO or Mencap. Data were collected through the completion of validated questionnaires by one to one interviews with the participants. Analysis revealed that self-esteem, quality of life, and stress were all significantly associated with SO <span class="hlt">involvement</span>. Logistic regression analysis was used to explore whether scores on these variables were able to predict group membership. Self-esteem was found to be a significant predictor of group membership, those in the SO having the highest self-esteem. The findings provide further evidence of a positive association between sport <span class="hlt">involvement</span> and increased psychological wellbeing, especially for those <span class="hlt">involved</span> in the SO. The implications of these findings for practice and future research into the relationship between sport and psychological wellbeing within the learning disabled population are considered. PMID:26275609</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26275609','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26275609"><span id="translatedtitle">Psychosocial <span class="hlt">impact</span> of <span class="hlt">involvement</span> in the Special Olympics.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Crawford, Clare; Burns, Jan; Fernie, Bruce A</p> <p>2015-01-01</p> <p>Existing evidence suggests that people with intellectual disabilities are vulnerable to low self-esteem leading to additional psychosocial issues such as social exclusion and stress. Previous research into the <span class="hlt">involvement</span> of Special Olympics (SO) of people with intellectual disabilities has indicted positive psychosocial outcomes. <span class="hlt">Involvement</span> in sport is known generally to have psychological and social benefits. This study aimed to compare the psychosocial <span class="hlt">impact</span> of <span class="hlt">involvement</span> in sport through the SO to no or limited sports <span class="hlt">involvement</span>, for a sample of people with intellectual disabilities. A cross sectional design was employed comparing three groups, SO, Mencap Sports, and Mencap No Sports on the variables: Self-esteem, quality of life, stress levels and social networks. One hundred and one participants were recruited either through the SO or Mencap. Data were collected through the completion of validated questionnaires by one to one interviews with the participants. Analysis revealed that self-esteem, quality of life, and stress were all significantly associated with SO <span class="hlt">involvement</span>. Logistic regression analysis was used to explore whether scores on these variables were able to predict group membership. Self-esteem was found to be a significant predictor of group membership, those in the SO having the highest self-esteem. The findings provide further evidence of a positive association between sport <span class="hlt">involvement</span> and increased psychological wellbeing, especially for those <span class="hlt">involved</span> in the SO. The implications of these findings for practice and future research into the relationship between sport and psychological wellbeing within the learning disabled population are considered.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/27142952','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/27142952"><span id="translatedtitle">Assessing the organizational <span class="hlt">impact</span> of patient <span class="hlt">involvement</span>: a first STEPP.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Kreindler, Sara A; Struthers, Ashley</p> <p>2016-05-01</p> <p>Purpose - Patient <span class="hlt">involvement</span> in the design and improvement of health services is increasingly recognized as an essential part of patient-centred care. Yet little research, and no measurement tool, has addressed the organizational <span class="hlt">impacts</span> of such <span class="hlt">involvement</span>. The paper aims to discuss these issues. Design/methodology/approach - The authors developed and piloted the scoresheet for tangible effects of patient participation (STEPP) to measure the instrumental use of patient input. Its items assess the magnitude of each recommendation or issue brought forward by patients, the extent of the organization's response, and the apparent degree of patient influence on this response. In collaboration with teams (staff) from five <span class="hlt">involvement</span> initiatives, the authors collected interview and documentary data and scored the STEPP, first independently then jointly. Feedback meetings and a "challenges log" supported ongoing improvement. Findings - Although researchers' and teams' initial scores often diverged, the authors quickly reached consensus as new information was shared. Composite scores appeared to credibly reflect the degree of organizational <span class="hlt">impact</span>, and were associated with salient features of the <span class="hlt">involvement</span> initiatives. Teams described the STEPP as easy to use and useful for monitoring and accountability purposes. The tool seemed most suitable for initiatives in which patients generated novel, concrete recommendations; less so for broad public consultations of which instrumental use was not a primary goal. Originality/value - The STEPP is a promising, first-in-class tool with potential usefulness to both researchers and practitioners. With further research to better establish its reliability and validity, it could make a valuable contribution to full mixed-methods evaluation of patient <span class="hlt">involvement</span>. PMID:27142952</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li class="active"><span>1</span></li> <li><a href="#" onclick='return showDiv("page_2");'>2</a></li> <li><a href="#" onclick='return showDiv("page_3");'>3</a></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_1 --> <div id="page_2" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_1");'>1</a></li> <li class="active"><span>2</span></li> <li><a href="#" onclick='return showDiv("page_3");'>3</a></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="21"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23367938','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23367938"><span id="translatedtitle"><span class="hlt">Impact</span> on <span class="hlt">porous</span> targets: penetration, crater formation, target compaction, and ejection.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Ringl, Christian; Bringa, Eduardo M; Urbassek, Herbert M</p> <p>2012-12-01</p> <p>Using a granular-mechanics code, we study the <span class="hlt">impact</span> of a sphere into a <span class="hlt">porous</span> adhesive granular target, consisting of monodisperse silica grains. The model includes elastic repulsive, adhesive, and dissipative forces, as well as sliding, rolling, and twisting friction. <span class="hlt">Impact</span> velocities of up to 30 m/s and target filling factors (densities) between 19% and 35% have been systematically studied. We find that the projectile is stopped by an effective drag force which is proportional to the square of its velocity. Target adhesion influences projectile stopping only below a critical velocity, which increases with adhesion. The penetration depth depends approximately logarithmically on the <span class="hlt">impact</span> velocity and is inversely proportional to the target density. The excavated crater is of conical form and is surrounded by a compaction zone whose width increases but whose maximum value decreases with increasing target density. Grain ejection increases in proportion with impactor velocity. Grains are ejected which have originally been buried to a depth of 8R(grain) below the surface; the angular distribution favors oblique ejection with a maximum around 45°. The velocity distribution of ejected grains features a broad low-velocity maximum around 0.5-1 m/s but exhibits a high-velocity tail up to ~15% of the projectile <span class="hlt">impact</span> velocity.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23474339','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23474339"><span id="translatedtitle">Effectiveness of low <span class="hlt">impact</span> development practices in two urbanized watersheds: retrofitting with rain barrel/cistern and <span class="hlt">porous</span> pavement.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Ahiablame, Laurent M; Engel, Bernard A; Chaubey, Indrajeet</p> <p>2013-04-15</p> <p>The <span class="hlt">impacts</span> of urbanization on hydrology and water quality can be minimized with the use of low <span class="hlt">impact</span> development (LID) practices in urban areas. This study assessed the performance of rain barrel/cistern and <span class="hlt">porous</span> pavement as retrofitting technologies in two urbanized watersheds of 70 and 40 km(2) near Indianapolis, Indiana. Six scenarios consisting of the watershed existing condition, 25% and 50% implementation of rain barrel/cistern and <span class="hlt">porous</span> pavement, and 25% rain barrel/cistern combined with 25% <span class="hlt">porous</span> pavement were evaluated using a proposed LID modeling framework and the Long-Term Hydrologic <span class="hlt">Impact</span> Assessment (L-THIA)-LID model. The model was calibrated for annual runoff from 1991 to 2000, and validated from 2001 to 2010 for the two watersheds. For the calibration period, R(2) and NSE values were greater than 0.60 and 0.50 for annual runoff and streamflow. Baseflow was not calibrated in this study. During the validation period, R(2) and NSE values were greater than 0.50 for runoff and streamflow, and 0.30 for baseflow in the two watersheds. The various application levels of barrel/cistern and <span class="hlt">porous</span> pavement resulted in 2-12% reduction in runoff and pollutant loads for the two watersheds. Baseflow loads slightly increased with increase in baseflow by more than 1%. However, reduction in runoff led to reduction in total streamflow and associated pollutant loads by 1-9% in the watersheds. The results also indicate that the application of 50% rain barrel/cistern, 50% <span class="hlt">porous</span> pavement and 25% rain barrel/cistern combined with 25% <span class="hlt">porous</span> pavement are good retrofitting options in these watersheds. The L-THIA-LID model can be used to inform management and decision-making for implementation of LID practices at the watershed scale.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2001JCHyd..50..225S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2001JCHyd..50..225S"><span id="translatedtitle">Biodegradation during contaminant transport in <span class="hlt">porous</span> media: 4. <span class="hlt">Impact</span> of microbial lag and bacterial cell growth</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Sandrin, Susannah K.; Jordan, Fiona L.; Maier, Raina M.; Brusseau, Mark L.</p> <p>2001-08-01</p> <p>Miscible-displacement experiments were conducted to examine the <span class="hlt">impact</span> of microbial lag and bacterial cell growth on the transport of salicylate, a model hydrocarbon compound. The <span class="hlt">impacts</span> of these processes were examined separately, as well as jointly, to determine their relative effects on biodegradation dynamics. For each experiment, a column was packed with <span class="hlt">porous</span> medium that was first inoculated with bacteria that contained the NAH plasmid encoding genes for the degradation of naphthalene and salicylate, and then subjected to a step input of salicylate solution. The transport behavior of salicylate was non-steady for all cases examined, and was clearly influenced by a delay (lag) in the onset of biodegradation. This microbial lag, which was consistent with the results of batch experiments, is attributed to the induction and synthesis of the enzymes required for biodegradation of salicylate. The effect of microbial lag on salicylate transport was eliminated by exposing the column to two successive pulses of salicylate, thereby allowing the cells to acclimate to the carbon source during the first pulse. Elimination of microbial lag effects allowed the <span class="hlt">impact</span> of bacterial growth on salicylate transport to be quantified, which was accomplished by determining a cell mass balance. Conversely, the <span class="hlt">impact</span> of microbial lag was further investigated by performing a similar double-pulse experiment under no-growth conditions. Significant cell elution was observed and quantified for all conditions/systems. The results of these experiments allowed us to differentiate the effects associated with microbial lag and growth, two coupled processes whose <span class="hlt">impacts</span> on the biodegradation and transport of contaminants can be difficult to distinguish.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015WRR....51.8973M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015WRR....51.8973M"><span id="translatedtitle">The <span class="hlt">impact</span> of immobile zones on the transport and retention of nanoparticles in <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Molnar, Ian L.; Gerhard, Jason I.; Willson, Clinton S.; O'Carroll, Denis M.</p> <p>2015-11-01</p> <p>Nanoparticle transport and retention within <span class="hlt">porous</span> media is treated by conceptualizing the <span class="hlt">porous</span> media as a series of independent collectors (e.g., Colloid Filtration Theory). This conceptualization assumes that flow phenomena near grain-grain contacts, such as immobile zones (areas of low flow), exert a negligible influence on nanoparticle transport and assumes that retention and release of particles depends only on surface chemistry. This study investigated the <span class="hlt">impact</span> of immobile zones on nanoparticle transport and retention by employing synchrotron X-ray computed microtomography (SXCMT) to examine pore-scale silver nanoparticle distributions during transport through three sand columns: uniform iron oxide, uniform quartz, and well-graded quartz. Extended tailing was observed during the elution phase of all experiments suggesting that hydraulic retention in immobile zones, not detachment from grains, was the source of tailing. A numerical simulation of fluid flow through an SXCMT data set predicted the presence of immobile zones near grain-grain contacts. SXCMT-determined silver nanoparticle concentrations observed that significantly lower nanoparticle concentrations existed near grain-grain contacts throughout the duration of all experiments. In addition, the SXCMT-determined pore-scale concentration gradients were found to be independent of surface chemistry and grain size distribution, suggesting that immobile zones limit the diffusive transport of nanoparticles toward the collectors. These results suggest that the well-known overprediction of nanoparticle retention by traditional CFT may be due to ignoring the influences of grain-grain contacts and immobile zones. As such, accurate prediction of nanoparticle transport requires consideration of immobile zones and their influence on both hydraulic and surface retention.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/894846','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/894846"><span id="translatedtitle"><span class="hlt">Impact</span> of microbial growth on water flow and solute transport in unsaturated <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Yarwood, R. R.; Rockhold, M. L.; Niemet, M. R.; Selker, John S.; Bottomley, Peter J.</p> <p>2006-10-05</p> <p>A novel analytical method was developed that permitted real-time, noninvasive measurements of microbial growth and associated changes in hydrodynamic properties in <span class="hlt">porous</span> media under unsaturated flowing conditions. Salicylate-induced, lux gene-based bioluminescence was used to quantify the temporal and spatial development of colonization over a seven day time course. Water contents were determined daily by measuring light transmission through the system. Hydraulic flow paths were determined daily by pulsing a bromophenol blue dye solution through the colonized region of the sand. Bacterial growth and accumulation had a significant <span class="hlt">impact</span> on the hydraulic properties of the <span class="hlt">porous</span> media. Microbial colonization caused localized drying within the colonized zone, with decreases in saturation approaching 50% of antecedent values, and a 25% lowering of the capillary fringe height. Flow was retarded within the colonized zone and diverted around it. The apparent solute velocity through the colonized region was reduced from 0.41 cm min 1 (R2 = 0.99) to 0.25 cm min 1 (R2 = 0.99) by the sixth day of the experiment, associated with maximum population densities that would occupy about 7% of the available pore space within the colonized region. Changes in the extent of colonization occurred over the course of the experiment, including upward migration against flow. The distribution of cells was not determined by water flow alone, but rather by a dynamic interaction between water flow and microbial growth. This experimental system provides rich data sets for the testing of conceptualizations expressed through numerical modeling.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015P%26SS..107...36O','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015P%26SS..107...36O"><span id="translatedtitle"><span class="hlt">Impact</span> experiments on highly <span class="hlt">porous</span> targets: Cavity morphology and disruption thresholds in the strength regime</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Okamoto, Takaya; Nakamura, Akiko M.; Hasegawa, Sunao</p> <p>2015-03-01</p> <p>Small bodies were probably very <span class="hlt">porous</span> during the formation of the solar system. To understand the evolution of such bodies, <span class="hlt">impact</span> experiments on sintered glass-bead targets with porosities of 80%, 87%, and 94% were performed at velocities of 1.8-7.2 km s-1 using various projectiles with densities ranging from 1.1 g cm-3 to 4.5 g cm-3. Here we report on the resulting cavity morphologies formed by these <span class="hlt">impacts</span>, with particular attention paid to the depth from the cavity's entrance hole to its maximum diameter, the entrance-hole diameter, and the maximum diameter. We obtained empirical relations of the entrance-hole diameter and the maximum diameter using non-dimensional parameters for crater scaling. We also report on the targets' disruption thresholds, Q*. Each Q* value is on the order of kilojoules per kilogram, which is higher than the equivalent values for pure ice targets and basalt targets determined from high-velocity <span class="hlt">impact</span> experiments. Non-dimensional disruption thresholds, ρtQ* / Y, where ρt and Y are the targets' bulk densities and compressive strengths, respectively, are calculated for various targets including those used in this study; they are shown to be within approximately one order of magnitude for a given porosity, although the <span class="hlt">impact</span> velocities and target sizes range from 1 m s-1 to 7.2 km s-1 and from 2 cm to 14 cm, respectively. The previous proposed strength parameter for the catastrophic disruption threshold, Πs *, is also calculated. It is shown to be roughly constant, irrespective of porosity if we assume that the scaling parameter μ decreases linearly with increasing porosity.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014AGUFMNG14A..03H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014AGUFMNG14A..03H"><span id="translatedtitle"><span class="hlt">Impact</span> of Wettability on Fluid-Fluid Displacement in <span class="hlt">Porous</span> Media: A Pore-Scale Model</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Holtzman, R.; Segre, E.; Trojer, M.; Juanes, R.</p> <p>2014-12-01</p> <p>The displacement of a fluid by another in <span class="hlt">porous</span> media is affected by the wetting properties of the medium. While the wettability can vary significantly, its <span class="hlt">impact</span> is poorly understood. Here, we study the effect of wettability on the invasion patterns via a pore-scale model. We simulate the invasion of an inviscid fluid into a medium saturated with a viscous fluid, for various contact angles and injection rates. We show that increasing the contact angle (making the invading fluid more wetting) stabilizes the invasion front. In particular, at low injection rates, the invasion pattern becomes compact despite of the large, unfavorable viscosity ratio. These results compare favorably with experiments, in which air is injected in a Hele-Shaw cell filled with chemically-treated glass beads and saturated with water/glycerol. Our simulations suggest that the stabilization of the invasion front is due to the increasing dominance of cooperative, non-local invasion mechanisms. For nonwetting invasion (small contact angles, or drainage), the dominant mechanism is Haines jumps, which are controlled by the local pressure drop across individual menisci, whereas for wetting invasion (large contact angles, or imbibition) the stability of individual menisci depends on adjacent parts of the interface.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014AGUFM.H33D0852N','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014AGUFM.H33D0852N"><span id="translatedtitle"><span class="hlt">Impact</span> of viscous fingering and permeability heterogeneity on fluid mixing in <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Nicolaides, C.; Jha, B.; Cueto-Felgueroso, L.; Juanes, R.</p> <p>2014-12-01</p> <p>Fluid mixing plays a fundamental role in many natural and engineered processes, including groundwater flows in <span class="hlt">porous</span> media, enhanced oil recovery, and microfluidic lab-on-a-chip systems[1]. Recent developments have explored the effect of viscosity contrast on mixing, suggesting that the unstable displacement of fluids with different viscosities, or viscous fingering, provides a powerful mechanism to increase fluid--fluid interfacial area and enhance mixing[2]. In this paper, we revisit the problem of subsurface contaminant transport through a heterogeneous aquifer in a quarter five-spot geometry[3] and we focus on the <span class="hlt">impact</span> of two principal sources of disorder in the flow field: viscosity contrast between the fluids and heterogeneity in the permeability field. We consider a wide range of viscosity ratios of the contaminant and the water, from a less viscous to a more viscous contaminant, flowing through a range of permeability fields, from almost homogeneous to strongly heterogeneous. We ask the following practical question: how does the interplay between viscosity contrast and permeability heterogeneity determine the evolution of macroscopic quantities that characterize the spatial structure and temporal evolution of a contaminant plume? We answer this question by conducting high resolution simulations of contaminant flow and transport in an aquifer, and by analyzing both point measurements of contaminant breakthrough and clean-up times as well as global degree of mixing and dilution of the contaminant plume. [1] M. Dentz, T. Le Borgne, A. Englert, and B. Bijeljic, Mixing, spreading and reaction in heterogeneous media: A brief review, J. Contam. Hydrol. 120, 1-17 (2011). [2] B. Jha, L. Cueto-Felgueroso, and R. Juanes, Fluid mixing from viscous fingering. Phys. Rev. Lett. 106, 194502 (2011) [3] J. Luo, M. Dentz, O. A. Cirpka, and P. K. Kitanidis, Breakthrough curve tailing in a dipole flow field, Water Resour. Res. 43(9), W09403 (2007).</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/921683','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/921683"><span id="translatedtitle"><span class="hlt">IMPACT</span> OF COMPOSITION AND HEAT TREATMENT ON PORE SIZE IN <span class="hlt">POROUS</span> WALLED HOLLOW GLASS MICROSPHERES</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Raszewski, F; Erich Hansen, E; Ray Schumacher, R; David Peeler, D</p> <p>2007-12-04</p> <p>The Savannah River National Laboratory (SRNL) developed a new geometric form: hollow glass microspheres (HGMs), with unique <span class="hlt">porous</span> walls. The new geometric form combines the existing technology of HGMs with basic glass science knowledge in the realm of glass-in-glass phase separation. Conceptually, the development of a HGM with <span class="hlt">porous</span> walls (referred to as a PWHGM) provides a unique system in which various media or filling agents can be incorporated into the PWHGM (via transport through the <span class="hlt">porous</span> walls) and ultimately has the capacity to serve as a functional delivery system in various industrial applications. Applications of these types of systems could range from hydrogen storage, molecular sieves, drug and bioactive delivery systems, to environmental, chemical and biological indicators, relevant to Energy, Environmental Processing and Homeland Security fields. As a specific example, previous studies at SRNL have introduced materials capable of hydrogen storage (as well as other materials) into the interior of the PWHGMs. The goal of this project was to determine if the microstructure (i.e., pore size and pore size distribution) of a PWHGM could be altered or tailored by varying composition and/or heat treatment (time and/or temperature) conditions. The ability to tailor the microstructure through composition or heat treatments could provide the opportunity to design the PWHGM system to accommodate different additives or fill agents. To meet this objective, HGMs of various alkali borosilicate compositions were fabricated using a flame forming apparatus installed at the Aiken County Technical Laboratory (ACTL). HGMs were treated under various heat treatment conditions to induce and/or enhance glass in glass phase separation. Heat treatment temperatures ranged from 580 C to 620 C, while heat treatment times were either 8 or 24 hours. Of the two primary variables assessed in this study, heat treatment temperature was determined to be most effective in changing the</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/14827','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/14827"><span id="translatedtitle">Tailored <span class="hlt">Porous</span> Materials</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>BARTON,THOMAS J.; BULL,LUCY M.; KLEMPERER,WALTER G.; LOY,DOUGLAS A.; MCENANEY,BRIAN; MISONO,MAKOTO; MONSON,PETER A.; PEZ,GUIDO; SCHERER,GEORGE W.; VARTULI,JAMES C.; YAGHI,OMAR M.</p> <p>1999-11-09</p> <p>Tailoring of <span class="hlt">porous</span> materials <span class="hlt">involves</span> not only chemical synthetic techniques for tailoring microscopic properties such as pore size, pore shape, pore connectivity, and pore surface reactivity, but also materials processing techniques for tailoring the meso- and the macroscopic properties of bulk materials in the form of fibers, thin films and monoliths. These issues are addressed in the context of five specific classes of <span class="hlt">porous</span> materials: oxide molecular sieves, <span class="hlt">porous</span> coordination solids, <span class="hlt">porous</span> carbons, sol-gel derived oxides, and <span class="hlt">porous</span> heteropolyanion salts. Reviews of these specific areas are preceded by a presentation of background material and review of current theoretical approaches to adsorption phenomena. A concluding section outlines current research needs and opportunities.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=sylvia+day&pg=2&id=EJ155645','ERIC'); return false;" href="http://eric.ed.gov/?q=sylvia+day&pg=2&id=EJ155645"><span id="translatedtitle">Parent <span class="hlt">Involvement</span> in Day Care: Its <span class="hlt">Impact</span> on Staff and Classroom Environments</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Shapiro, Sylvia</p> <p>1977-01-01</p> <p>A large-scale study of the extent of parent <span class="hlt">involvement</span> on boards in preschool day care indicates that intensity of <span class="hlt">involvement</span>, rather than the number of parents <span class="hlt">involved</span>, is the key factor. The <span class="hlt">impact</span> of parent <span class="hlt">involvement</span> on staff and classroom environment also is examined. (MS)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22795398','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22795398"><span id="translatedtitle"><span class="hlt">Impact</span> of traffic states on freeway crash <span class="hlt">involvement</span> rates.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Yeo, Hwasoo; Jang, Kitae; Skabardonis, Alexander; Kang, Seungmo</p> <p>2013-01-01</p> <p>Freeway traffic accidents are complicated events that are influenced by multiple factors including roadway geometry, drivers' behavior, traffic conditions and environmental factors. Among the various factors, crash occurrence on freeways is supposed to be strongly influenced by the traffic states representing driving situations that are changed by road geometry and cause the change of drivers' behavior. This paper proposes a methodology to investigate the relationship between traffic states and crash <span class="hlt">involvements</span> on the freeway. First, we defined section-based traffic states: free flow (FF), back of queue (BQ), bottleneck front (BN) and congestion (CT) according to their distinctive patterns; and traffic states of each freeway section are determined based on actual measurements of traffic data from upstream and downstream ends of the section. Next, freeway crash data are integrated with the traffic states of a freeway section using upstream and downstream traffic measurements. As an illustrative study to show the applicability, we applied the proposed method on a 32-mile section of I-880 freeway. By integrating freeway crash occurrence and traffic data over a three-year period, we obtained the crash <span class="hlt">involvement</span> rate for each traffic state. The results show that crash <span class="hlt">involvement</span> rate in BN, BQ, and CT states are approximately 5 times higher than the one in FF. The proposed method shows promise to be used for various safety performance measurement including hot spot identification and prediction of the number of crash <span class="hlt">involvements</span> on freeway sections.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=sports+AND+affecting+AND+academics&id=EJ816872','ERIC'); return false;" href="http://eric.ed.gov/?q=sports+AND+affecting+AND+academics&id=EJ816872"><span id="translatedtitle"><span class="hlt">Impacts</span> of Campus <span class="hlt">Involvement</span> on Hospitality Student Achievement and Satisfaction</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Yin, Dean; Lei, Simon A.</p> <p>2007-01-01</p> <p>Campus <span class="hlt">involvement</span> affecting satisfaction and academic achievement (overall grade point average) of hospitality undergraduate students at a state university in the Midwest (University X) was investigated through a survey research. A four-part survey instrument was developed to facilitate this study. There were a number of academic, professional,…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26583740','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26583740"><span id="translatedtitle"><span class="hlt">Impact</span> of biofilm on bacterial transport and deposition in <span class="hlt">porous</span> media.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Bozorg, Ali; Gates, Ian D; Sen, Arindom</p> <p>2015-12-01</p> <p>Laboratory scale experiments were conducted to obtain insights into factors that influence bacterial transport and deposition in <span class="hlt">porous</span> media. According to colloidal filtration theory, the removal efficiency of a filter medium is characterized by two main factors: collision efficiency and sticking efficiency. In the case of bacterial transport in <span class="hlt">porous</span> media, bacteria attached to a solid surface can establish a thin layer of biofilm by excreting extracellular polymeric substances which can significantly influence both of these factors in a <span class="hlt">porous</span> medium, and thus, affect the overall removal efficiency of the filter medium. However, such polymeric interactions in bacterial adhesion are not well understood and a method to calculate polymeric interactions is not yet available. Here, to determine how the migration of bacteria flowing within a <span class="hlt">porous</span> medium is affected by the presence of surface-associated extracellular polymeric substances previously produced and deposited by the same bacterial species, a commonly used colloidal filtration model was applied to study transport and deposition of Pseudomonas fluorescens in small-scale columns packed with clean and biofilm coated glass beads. Bacterial recoveries were monitored in column effluents and used to quantify biofilm interactions and sticking efficiencies of the biofilm coated packed-beds. The results indicated that, under identical hydraulic conditions, the sticking efficiencies in packed-beds were improved consistently by 36% when covered by biofilm. PMID:26583740</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015JCHyd.183..109B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015JCHyd.183..109B"><span id="translatedtitle"><span class="hlt">Impact</span> of biofilm on bacterial transport and deposition in <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Bozorg, Ali; Gates, Ian D.; Sen, Arindom</p> <p>2015-12-01</p> <p>Laboratory scale experiments were conducted to obtain insights into factors that influence bacterial transport and deposition in <span class="hlt">porous</span> media. According to colloidal filtration theory, the removal efficiency of a filter medium is characterized by two main factors: collision efficiency and sticking efficiency. In the case of bacterial transport in <span class="hlt">porous</span> media, bacteria attached to a solid surface can establish a thin layer of biofilm by excreting extracellular polymeric substances which can significantly influence both of these factors in a <span class="hlt">porous</span> medium, and thus, affect the overall removal efficiency of the filter medium. However, such polymeric interactions in bacterial adhesion are not well understood and a method to calculate polymeric interactions is not yet available. Here, to determine how the migration of bacteria flowing within a <span class="hlt">porous</span> medium is affected by the presence of surface-associated extracellular polymeric substances previously produced and deposited by the same bacterial species, a commonly used colloidal filtration model was applied to study transport and deposition of Pseudomonas fluorescens in small-scale columns packed with clean and biofilm coated glass beads. Bacterial recoveries were monitored in column effluents and used to quantify biofilm interactions and sticking efficiencies of the biofilm coated packed-beds. The results indicated that, under identical hydraulic conditions, the sticking efficiencies in packed-beds were improved consistently by 36% when covered by biofilm.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26583740','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26583740"><span id="translatedtitle"><span class="hlt">Impact</span> of biofilm on bacterial transport and deposition in <span class="hlt">porous</span> media.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Bozorg, Ali; Gates, Ian D; Sen, Arindom</p> <p>2015-12-01</p> <p>Laboratory scale experiments were conducted to obtain insights into factors that influence bacterial transport and deposition in <span class="hlt">porous</span> media. According to colloidal filtration theory, the removal efficiency of a filter medium is characterized by two main factors: collision efficiency and sticking efficiency. In the case of bacterial transport in <span class="hlt">porous</span> media, bacteria attached to a solid surface can establish a thin layer of biofilm by excreting extracellular polymeric substances which can significantly influence both of these factors in a <span class="hlt">porous</span> medium, and thus, affect the overall removal efficiency of the filter medium. However, such polymeric interactions in bacterial adhesion are not well understood and a method to calculate polymeric interactions is not yet available. Here, to determine how the migration of bacteria flowing within a <span class="hlt">porous</span> medium is affected by the presence of surface-associated extracellular polymeric substances previously produced and deposited by the same bacterial species, a commonly used colloidal filtration model was applied to study transport and deposition of Pseudomonas fluorescens in small-scale columns packed with clean and biofilm coated glass beads. Bacterial recoveries were monitored in column effluents and used to quantify biofilm interactions and sticking efficiencies of the biofilm coated packed-beds. The results indicated that, under identical hydraulic conditions, the sticking efficiencies in packed-beds were improved consistently by 36% when covered by biofilm.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26583526','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26583526"><span id="translatedtitle"><span class="hlt">Porous</span> cationic polymers: the <span class="hlt">impact</span> of counteranions and charges on CO2 capture and conversion.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Buyukcakir, Onur; Je, Sang Hyun; Choi, Dong Shin; Talapaneni, Siddulu Naiudu; Seo, Yongbeom; Jung, Yousung; Polychronopoulou, Kyriaki; Coskun, Ali</p> <p>2016-01-18</p> <p><span class="hlt">Porous</span> cationic polymers (PCPs) with surface areas up to 755 m(2) g(-1) bearing positively charged viologen units in their backbones and different counteranions have been prepared. We have demonstrated that by simply varying counteranions both gas sorption and catalytic properties of PCPs can be tuned for metal-free capture and conversion of CO2 into value-added products such as cyclic carbonates with excellent yields. PMID:26583526</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26583526','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26583526"><span id="translatedtitle"><span class="hlt">Porous</span> cationic polymers: the <span class="hlt">impact</span> of counteranions and charges on CO2 capture and conversion.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Buyukcakir, Onur; Je, Sang Hyun; Choi, Dong Shin; Talapaneni, Siddulu Naiudu; Seo, Yongbeom; Jung, Yousung; Polychronopoulou, Kyriaki; Coskun, Ali</p> <p>2016-01-18</p> <p><span class="hlt">Porous</span> cationic polymers (PCPs) with surface areas up to 755 m(2) g(-1) bearing positively charged viologen units in their backbones and different counteranions have been prepared. We have demonstrated that by simply varying counteranions both gas sorption and catalytic properties of PCPs can be tuned for metal-free capture and conversion of CO2 into value-added products such as cyclic carbonates with excellent yields.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2005cmns.conf..771C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2005cmns.conf..771C"><span id="translatedtitle"><span class="hlt">Impact</span> of Boundary Effects <span class="hlt">Involving</span> Broken Gauge Symmetry on Lenr's</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Chubb, Scott R.</p> <p>2005-12-01</p> <p>Surfaces have a huge <span class="hlt">impact</span> on the physics and chemistry of solids. Changes in surfaces (or other boundaries of a solid), in particular, can be related to changes in the local ("chemical") environment. In the idealized limit, in which surfaces are defined as "boundaries" associated with a lack of, or accumulation of charge, dynamical effects at surfaces can be used and are required (by the associated coupling to external electromagnetic fields) to relate seemingly unrelated local and non-local effects. Thus, counter-intuitive ideas about local and non-local effects can become dominant. In particular, in PdH or PdD, provided external forces are applied uniformly, it is entirely possible for hydrogen (p) or deuterium (d) nuclei to acquire a common phase (a broken gauge symmetry1) and to "become wave-like" and interact coherently, through the electromagnetic field, simultaneously, but an isotropically at the boundaries of a PdD or PdH substrate, or at isolated locations within either substrate. Also, these effects can create coupling between localized and delocalized forms of interaction. We use these and related effects as the basis for suggesting new experiments that have bearing on the findings of Iwamura et al., concerning the "apparent" transmutation of Cs-Pr.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016JPS...320...59S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016JPS...320...59S"><span id="translatedtitle">Atomic structural and electrochemical <span class="hlt">impact</span> of Fe substitution on nano <span class="hlt">porous</span> LiMnPO4</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Seo, Inseok; Senthilkumar, B.; Kim, Kwang-Ho; Kim, Jae-Kwang; Kim, Youngsik; Ahn, Jou-Hyeon</p> <p>2016-07-01</p> <p>The atomic structural and electrochemical properties of Fe substituted nano <span class="hlt">porous</span> LiMn1-xFexPO4 (x = 0-0.8) composites are investigated and compared. X-ray scattering method is used for atomic structural investigation. Rietveld refinement shows that all Fe substituted composites have the same olivine structure (Pnma) with lithium occupying octahedral 4a sites, Fe2+ replacing Mn2+ at the octahedral 4c sites. The a, b, c parameters and cell volume decrease with the addition of Fe2+. When the nano <span class="hlt">porous</span> LiMn1-xFexPO4 composites are evaluated as cathode materials in lithium cells at room temperature, x = 0.6, and 0.8 resulted in the best overall electrochemical performance, exhibiting stable cycling and high discharge capacities of 149 and 154 mA h g-1, respectively. The composites with above x = 0.4 show a fast lithium ions transfer with high electronic conductivity because Fe transition metal substitution reduce the partly occupation of Mn in the M1 (LiO6) sites and thereby Mn block the lithium ion diffusion pathway. We here firstly find the antisite defect in the high Mn content in <span class="hlt">porous</span> LiMn1-xFexPO4 composites.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_1");'>1</a></li> <li class="active"><span>2</span></li> <li><a href="#" onclick='return showDiv("page_3");'>3</a></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_2 --> <div id="page_3" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_1");'>1</a></li> <li><a href="#" onclick='return showDiv("page_2");'>2</a></li> <li class="active"><span>3</span></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="41"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016LPICo1921.6365W','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016LPICo1921.6365W"><span id="translatedtitle">Subsurface Deformation of Experimental Hypervelocity <span class="hlt">Impacts</span> in Non-<span class="hlt">Porous</span> Targets</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Winkler, R.; Poelchau, M. H.; Schäfer, F.; Kenkmann, T.</p> <p>2016-08-01</p> <p>Experimental hypervelocity <span class="hlt">impacts</span> in quartzite and marble targets under similar <span class="hlt">impact</span> conditions reveal great differences in <span class="hlt">impact</span> induced deformation mechanisms, due to the dynamic mechanical properties of the main rock-forming minerals.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015AGUFM.H31A1407W','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015AGUFM.H31A1407W"><span id="translatedtitle">Free and Forced Convection in High Permeability <span class="hlt">Porous</span> Media: <span class="hlt">Impact</span> on Gas Flux at the Earth-atmosphere Interface</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Weisbrod, N.; Levintal, E.; Dragila, M. I.; Kamai, T.</p> <p>2015-12-01</p> <p>Gas movement within the earth's subsurface and its exchange with the atmosphere is one of the principal elements contributing to soil and atmospheric function. As the soil permeability increases, gas circulation by convective mechanisms becomes significantly greater than the diffusion. Two of the convective mechanisms, which can be of great importance, are being explored in this research. The first one is thermal convection venting (TCV), which develops when there are unstable density gradients. The second mechanism is wind induced convection (WIC), which develops due to surface winds that drive air movement. Here, we report the results of a study on the relationships between the <span class="hlt">porous</span> media permeability and particle size, and the development and magnitude of TCV and WIC with the development of thermal differences and surface winds. The research included large high-permeability column experiments carried out under highly controlled laboratory conditions, using well-defined single-sized spherical particles while surface winds and thermal differences were forced and monitored. CO2 enriched air, functioned as a tracer, was used to quantify the <span class="hlt">impact</span> of TCV and WIC on gas migration in the <span class="hlt">porous</span> media. Results show that in homogenous <span class="hlt">porous</span> media a permeability range of 10-7 to 10-6 m2 is the threshold value for TCV onset under standard atmospheric conditions. Adding surface wind with an average velocity of 1.5 m s-1 resulted in WIC effect to a depth of -0.3 m in most experimental settings; however, it did not caused additional air circulation at the reference depth of -0.9 m. Furthermore, given the appropriate conditions, a combined effect of TCV and WIC did significantly increase the overall media ventilation. Simulations of temperature profiles in soil under that permeability, showed that as the thermal gradient changes with depth and is a continuous function, TCV cells can be developed in local sections of the profile, not necessarily reaching the atmosphere.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/25730628','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/25730628"><span id="translatedtitle">The <span class="hlt">impact</span> of gambling advertising: Problem gamblers report stronger <span class="hlt">impacts</span> on <span class="hlt">involvement</span>, knowledge, and awareness than recreational gamblers.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Hanss, Daniel; Mentzoni, Rune A; Griffiths, Mark D; Pallesen, Ståle</p> <p>2015-06-01</p> <p>Although there is a general lack of empirical evidence that advertising influences gambling participation, the regulation of gambling advertising is hotly debated among academic researchers, treatment specialists, lobby groups, regulators, and policymakers. This study contributes to the ongoing debate by investigating perceived <span class="hlt">impacts</span> of gambling advertising in a sample of gamblers drawn from the general population in Norway (n = 6,034). Three dimensions of advertising <span class="hlt">impacts</span> were identified, representing perceived <span class="hlt">impacts</span> on (a) gambling-related attitudes, interest, and behavior ("<span class="hlt">involvement</span>"); (b) knowledge about gambling options and providers ("knowledge"); and (c) the degree to which people are aware of gambling advertising ("awareness"). Overall, <span class="hlt">impacts</span> were strongest for the knowledge dimension, and, for all 3 dimensions, the <span class="hlt">impact</span> increased with level of advertising exposure. Those identified as problem gamblers in the sample (n = 57) reported advertising <span class="hlt">impacts</span> concerning <span class="hlt">involvement</span> more than recreational gamblers, and this finding was not attributable to differences in advertising exposure. Additionally, younger gamblers reported stronger <span class="hlt">impacts</span> on <span class="hlt">involvement</span> and knowledge but were less likely to agree that they were aware of gambling advertising than older gamblers. Male gamblers were more likely than female gamblers to report stronger <span class="hlt">impacts</span> on both <span class="hlt">involvement</span> and knowledge. These findings are discussed with regard to existing research on gambling advertising as well as their implications for future research and policy-making. (PsycINFO Database Record PMID:25730628</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25730628','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25730628"><span id="translatedtitle">The <span class="hlt">impact</span> of gambling advertising: Problem gamblers report stronger <span class="hlt">impacts</span> on <span class="hlt">involvement</span>, knowledge, and awareness than recreational gamblers.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Hanss, Daniel; Mentzoni, Rune A; Griffiths, Mark D; Pallesen, Ståle</p> <p>2015-06-01</p> <p>Although there is a general lack of empirical evidence that advertising influences gambling participation, the regulation of gambling advertising is hotly debated among academic researchers, treatment specialists, lobby groups, regulators, and policymakers. This study contributes to the ongoing debate by investigating perceived <span class="hlt">impacts</span> of gambling advertising in a sample of gamblers drawn from the general population in Norway (n = 6,034). Three dimensions of advertising <span class="hlt">impacts</span> were identified, representing perceived <span class="hlt">impacts</span> on (a) gambling-related attitudes, interest, and behavior ("<span class="hlt">involvement</span>"); (b) knowledge about gambling options and providers ("knowledge"); and (c) the degree to which people are aware of gambling advertising ("awareness"). Overall, <span class="hlt">impacts</span> were strongest for the knowledge dimension, and, for all 3 dimensions, the <span class="hlt">impact</span> increased with level of advertising exposure. Those identified as problem gamblers in the sample (n = 57) reported advertising <span class="hlt">impacts</span> concerning <span class="hlt">involvement</span> more than recreational gamblers, and this finding was not attributable to differences in advertising exposure. Additionally, younger gamblers reported stronger <span class="hlt">impacts</span> on <span class="hlt">involvement</span> and knowledge but were less likely to agree that they were aware of gambling advertising than older gamblers. Male gamblers were more likely than female gamblers to report stronger <span class="hlt">impacts</span> on both <span class="hlt">involvement</span> and knowledge. These findings are discussed with regard to existing research on gambling advertising as well as their implications for future research and policy-making. (PsycINFO Database Record</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014WRR....50.9103K','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014WRR....50.9103K"><span id="translatedtitle"><span class="hlt">Impact</span> of biofilm-induced heterogeneities on solute transport in <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Kone, T.; Golfier, F.; Orgogozo, L.; Oltéan, C.; Lefèvre, E.; Block, J. C.; Buès, M. A.</p> <p>2014-11-01</p> <p>In subsurface systems, biofilm may degrade organic or organometallic pollutants contributing to natural attenuation and soil bioremediation techniques. This increase of microbial activity leads to change the hydrodynamic properties of aquifers. The purpose of this work was to investigate the influence of biofilm-induced heterogeneities on solute transport in <span class="hlt">porous</span> media and more specifically on dispersivity. We pursued this goal by (i) monitoring both spatial concentration fields and solute breakthrough curves from conservative tracer experiments in a biofilm-supporting <span class="hlt">porous</span> medium, (ii) characterizing in situ the changes in biovolume and visualizing the dynamics of the biological material at the mesoscale. A series of experiments was carried out in a flow cell system (60 cm3) with a silica sand (Φ = 50-70 mesh) as solid carrier and Shewanella oneidensis MR-1 as bacterial strain. Biofilm growth was monitored by image acquisition with a digital camera. The biofilm volume fraction was estimated through tracer experiments with the Blue Dextran macromolecule as in size-exclusion chromatography, leading to a fair picture of the biocolonization within the flow cell. Biofilm growth was achieved in the whole flow cell in 29 days and up to 50% of void space volume was plugged. The influence of biofilm maturation on <span class="hlt">porous</span> medium transport properties was evaluated from tracer experiments using Brilliant Blue FCF. An experimental correlation was found between effective (i.e., nonbiocolonized) porosity and biofilm-affected dispersivity. Comparison with values given by the theoretical model of Taylor and Jaffé (1990b) yields a fair agreement.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016EGUGA..18.4035M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016EGUGA..18.4035M"><span id="translatedtitle"><span class="hlt">Impact</span> of multicomponent ionic transport on pH fronts propagation in saturated <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Muniruzzaman, Muhammad; Rolle, Massimo</p> <p>2016-04-01</p> <p>Multicomponent ionic interactions have been increasingly recognized as important factors for the displacement of charged species in <span class="hlt">porous</span> media under both diffusion- [1,2] and advection-dominated flow regimes [3,4]. In this study we investigate the propagation of pH fronts during multicomponent ionic transport in saturated <span class="hlt">porous</span> media under flow-through conditions. By performing laboratory bench-scale experiments combined with numerical modeling we show the important influence of Coulombic effects on proton transport in the presence of ionic admixtures. The experiments were performed in a quasi two-dimensional flow-through setup under steady-state flow and transport conditions. Dilute solutions of hydrochloric acid with MgCl2 (1:2 strong electrolyte) were used as tracer solutions to experimentally test the effect of electrochemical cross-coupling on the migration of diffusive/dispersive pH fronts. We focus on two experimental scenarios, with different composition of tracer solutions, causing remarkably different effects on the propagation of the acidic fronts with relative differences in the penetration depth of pH fronts of 36% between the two scenarios and of 25% and 15% for each scenario with respect to the transport of ions at liberated state (i.e., without considering the charge effects). Also significant differences in the dilution of the distinct ionic plumes, quantified using the flux-related dilution index at the laboratory bench scale [5], were measured at the outflow of the flow-through system. The dilution of the pH plumes also changed considerably (26% relative difference) in the two flow-through experiments only due to the different composition of the pore water solution and to the electrostatic coupling of the ions in the flow-through setups. Numerical transport simulations were performed to interpret the laboratory experiments. The simulations were based on a multicomponent ionic formulation accurately capturing the Coulombic interactions between</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/EJ1054940.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/EJ1054940.pdf"><span id="translatedtitle">The <span class="hlt">Impact</span> of <span class="hlt">Involving</span> Students in Managing the Quality of Higher Education Provision</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Garwe, Evelyn Chiyevo</p> <p>2015-01-01</p> <p>This study was aimed at exploring the power of student <span class="hlt">involvement</span> in improving quality of higher educational provision in private higher education institutions in Zimbabwe. A longitudinal approach <span class="hlt">involving</span> two separate surveys and covering a period of three years was used. A preliminary survey aimed at assessing the issues that <span class="hlt">impact</span> negatively…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=high+AND+involvement+AND+product&id=ED531436','ERIC'); return false;" href="http://eric.ed.gov/?q=high+AND+involvement+AND+product&id=ED531436"><span id="translatedtitle">The <span class="hlt">Impact</span> of Motivation to Lead on College Students' Cocurricular <span class="hlt">Involvement</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Pepper, Robert C.</p> <p>2009-01-01</p> <p>This exploratory research examined the <span class="hlt">impact</span> of motivation to lead on college students' cocurricular <span class="hlt">involvement</span>. The question driving this research was: Is motivation to lead a predictor of cocurricular student <span class="hlt">involvement</span>? A 52-item questionnaire that included the Motivation to Lead Self-Report Questionnaire (Chan & Drasgow, 2001) was used to…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26821548','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26821548"><span id="translatedtitle">Decreasing Risky Behavior on Social Network Sites: The <span class="hlt">Impact</span> of Parental <span class="hlt">Involvement</span> in Secondary Education Interventions.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Vanderhoven, Ellen; Schellens, Tammy; Valcke, Martin</p> <p>2016-06-01</p> <p>Teenagers face significant risks when using increasingly popular social network sites. Prevention and intervention efforts to raise awareness about these risks and to change risky behavior (so-called "e-safety" interventions) are essential for the wellbeing of these minors. However, several studies have revealed that while school interventions often affect awareness, they have only a limited <span class="hlt">impact</span> on pupils' unsafe behavior. Utilizing the Theory of Planned Behavior and theories about parental <span class="hlt">involvement</span>, we hypothesized that <span class="hlt">involving</span> parents in an e-safety intervention would positively influence pupils' intentions and behavior. In a quasi-experimental study with pre- and post-test measures <span class="hlt">involving</span> 207 pupils in secondary education, we compared the <span class="hlt">impact</span> of an intervention without parental <span class="hlt">involvement</span> with one that included active parental <span class="hlt">involvement</span> by means of a homework task. We found that whereas parental <span class="hlt">involvement</span> was not necessary to improve the intervention's <span class="hlt">impact</span> on risk awareness, it did change intentions to engage in certain unsafe behavior, such as posting personal and sexual information on the profile page of a social network site, and in reducing existing problematic behavior. This beneficial <span class="hlt">impact</span> was particularly evident for boys. These findings suggest that developing prevention campaigns with active parental <span class="hlt">involvement</span> is well worth the effort. Researchers and developers should therefore focus on other efficient strategies to <span class="hlt">involve</span> parents. PMID:26821548</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/18275319','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/18275319"><span id="translatedtitle">The <span class="hlt">impact</span> of banners on digital television: the role of program interactivity and product <span class="hlt">involvement</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Cauberghe, Verolien; De Pelsmacker, Patrick</p> <p>2008-02-01</p> <p>In a sample of 281 respondents, the effect of a noninteractive and a medium-interactive television program on recall and brand attitudes for low- and high-<span class="hlt">involvement</span> products advertised in banners during these programs was investigated. Medium-interactive programs resulted in less product and brand recall and recognition of brands in embedded banner advertisements, but generated more positive brand attitudes than noninteractive programs. These effects were more outspoken for a high-<span class="hlt">involvement</span> product than for a low-<span class="hlt">involvement</span> product. The <span class="hlt">impact</span> of perceived program interactivity on brand attitude is fully mediated program valence and <span class="hlt">involvement</span> for low-<span class="hlt">involvement</span> products, but not for high-<span class="hlt">involvement</span> products, for which perceived program interactivity had a direct <span class="hlt">impact</span> on brand attitude.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/18275319','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/18275319"><span id="translatedtitle">The <span class="hlt">impact</span> of banners on digital television: the role of program interactivity and product <span class="hlt">involvement</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Cauberghe, Verolien; De Pelsmacker, Patrick</p> <p>2008-02-01</p> <p>In a sample of 281 respondents, the effect of a noninteractive and a medium-interactive television program on recall and brand attitudes for low- and high-<span class="hlt">involvement</span> products advertised in banners during these programs was investigated. Medium-interactive programs resulted in less product and brand recall and recognition of brands in embedded banner advertisements, but generated more positive brand attitudes than noninteractive programs. These effects were more outspoken for a high-<span class="hlt">involvement</span> product than for a low-<span class="hlt">involvement</span> product. The <span class="hlt">impact</span> of perceived program interactivity on brand attitude is fully mediated program valence and <span class="hlt">involvement</span> for low-<span class="hlt">involvement</span> products, but not for high-<span class="hlt">involvement</span> products, for which perceived program interactivity had a direct <span class="hlt">impact</span> on brand attitude. PMID:18275319</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015WRR....51.6739M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015WRR....51.6739M"><span id="translatedtitle"><span class="hlt">Impact</span> of multicomponent ionic transport on pH fronts propagation in saturated <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Muniruzzaman, Muhammad; Rolle, Massimo</p> <p>2015-08-01</p> <p>We investigate the propagation of pH fronts during multicomponent ionic transport in saturated <span class="hlt">porous</span> media under flow-through conditions. By performing laboratory bench-scale experiments combined with numerical modeling, we show the important influence of Coulombic effects on proton transport in the presence of ionic admixtures. The experiments were performed in a quasi two-dimensional flow-through setup under steady-state flow and transport conditions. Dilute solutions of hydrochloric acid with MgCl2 (1:2 strong electrolyte) were used as tracer solutions to experimentally test the effect of electrochemical cross coupling on the migration of diffusive/dispersive pH fronts. We focus on two experimental scenarios, with different composition of tracer solutions, causing remarkably different effects on the propagation of the acidic fronts with relative differences in the penetration depth of pH fronts of 36% between the two scenarios and of 25% and 15% for each scenario with respect to the transport of ions at liberated state (i.e., without considering the charge effects). Also differences in the dilution of the distinct ions plumes up to 28% and 45% in experiment 1 and 2, respectively, were measured at the outflow of the flow-through system. The dilution of the pH plumes also changed considerably (26% relative difference) in the two flow-through experiments only due to the different composition of the pore water solution and to the electrostatic coupling of the ions in the flow-through setups. Numerical transport simulations were performed to interpret the laboratory experiments. The simulations were based on a multicomponent ionic formulation accurately capturing the Coulombic interactions between the transported ions in the flow-through system. The results of purely forward simulations show a very good agreement with the high-resolution measurements performed at the outlet of the flow-through setup and confirms the importance of charge effects on pH transport in</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/1446552','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/1446552"><span id="translatedtitle"><span class="hlt">Impact</span> of parenting practices on adolescent achievement: authoritative parenting, school <span class="hlt">involvement</span>, and encouragement to succeed.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Steinberg, L; Lamborn, S D; Dornbusch, S M; Darling, N</p> <p>1992-10-01</p> <p>This article examines the <span class="hlt">impact</span> of authoritative parenting, parental <span class="hlt">involvement</span> in schooling, and parental encouragement to succeed on adolescent school achievement in an ethnically and socio-economically heterogeneous sample of approximately 6,400 American 14-18-year-olds. Adolescents reported in 1987 on their parents' general child-rearing practices and on their parents' achievement-specific socialization behaviors. In 1987, and again in 1988, data were collected on several aspects of the adolescents' school performance and school engagement. Authoritative parenting (high acceptance, supervision, and psychological autonomy granting) leads to better adolescent school performance and stronger school engagement. The positive <span class="hlt">impact</span> of authoritative parenting on adolescent achievement, however, is mediated by the positive effect of authoritativeness on parental <span class="hlt">involvement</span> in schooling. In addition, nonauthoritativeness attenuates the beneficial <span class="hlt">impact</span> of parental <span class="hlt">involvement</span> in schooling on adolescents achievement. Parental <span class="hlt">involvement</span> is much more likely to promote adolescent school success when it occurs in the context of an authoritative home environment.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5013512','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5013512"><span id="translatedtitle">Psychological <span class="hlt">impact</span> and recovery after <span class="hlt">involvement</span> in a patient safety incident: a repeated measures analysis</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Van Gerven, Eva; Bruyneel, Luk; Panella, Massimiliano; Euwema, Martin; Sermeus, Walter; Vanhaecht, Kris</p> <p>2016-01-01</p> <p>Objective To examine individual, situational and organisational aspects that influence psychological <span class="hlt">impact</span> and recovery of a patient safety incident on physicians, nurses and midwives. Design Cross-sectional, retrospective surveys of physicians, midwives and nurses. Setting 33 Belgian hospitals. Participants 913 clinicians (186 physicians, 682 nurses, 45 midwives) <span class="hlt">involved</span> in a patient safety incident. Main outcome measures The <span class="hlt">Impact</span> of Event Scale was used to retrospectively measure psychological <span class="hlt">impact</span> of the safety incident at the time of the event and compare it with psychological <span class="hlt">impact</span> at the time of the survey. Results Individual, situational as well as organisational aspects influenced psychological <span class="hlt">impact</span> and recovery of a patient safety incident. Psychological <span class="hlt">impact</span> is higher when the degree of harm for the patient is more severe, when healthcare professionals feel responsible for the incident and among female healthcare professionals. <span class="hlt">Impact</span> of degree of harm differed across clinicians. Psychological <span class="hlt">impact</span> is lower among more optimistic professionals. Overall, <span class="hlt">impact</span> decreased significantly over time. This effect was more pronounced for women and for those who feel responsible for the incident. The longer ago the incident took place, the stronger <span class="hlt">impact</span> had decreased. Also, higher psychological <span class="hlt">impact</span> is related with the use of a more active coping and planning coping strategy, and is unrelated to support seeking coping strategies. Rendered support and a support culture reduce psychological <span class="hlt">impact</span>, whereas a blame culture increases psychological <span class="hlt">impact</span>. No associations were found with job experience and resilience of the health professional, the presence of a second victim support team or guideline and working in a learning culture. Conclusions Healthcare organisations should anticipate on providing their staff appropriate and timely support structures that are tailored to the healthcare professional <span class="hlt">involved</span> in the incident and to the specific</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015WRR....51.1710J','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015WRR....51.1710J"><span id="translatedtitle"><span class="hlt">Impact</span> of interfacial tension on residual CO2 clusters in <span class="hlt">porous</span> sandstone</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Jiang, Fei; Tsuji, Takeshi</p> <p>2015-03-01</p> <p>We develop a numerical simulation that uses the lattice Boltzmann method to directly calculate the characteristics of residual nonwetting-phase clusters to quantify capillary trapping mechanisms in real sandstone. For this purpose, a digital-rock-pore model reconstructed from micro-CT-scanned images of Berea sandstone is filtered and segmented into a binary file. The residual-cluster distribution is generated following simulation of the drainage and imbibition processes. The characteristics of the residual cluster in terms of size distribution, major length, interfacial area, and sphericity are investigated under conditions of different interfacial tension (IFT). Our results indicate that high interfacial tension increases the residual saturation and leads to a large size distribution of residual clusters. However, low interfacial tension results in a larger interfacial area, which is beneficial for dissolution and reaction processes during geological carbon storage. Analysis of the force balance acting on the residual clusters demonstrates that trapping stability is higher in high interfacial tension case, and the interfacial tension should be a controlling factor for the trapping stability in addition to the pore geometry and connectivity. The proposed numerical method can handle the complex displacement of multicomponent systems in <span class="hlt">porous</span> media. By using this method, we can obtain residual-cluster distributions under different conditions for optimizing the storage capacity of carbon-storage projects.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016LPICo1921.6335H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016LPICo1921.6335H"><span id="translatedtitle">Tracing Shock Wave Attenuation in <span class="hlt">Porous</span>, Particulate Targets: Insights from <span class="hlt">Impact</span> Experiments and Numerical Modeling</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Hamann, C.; Zhu, M.-H.; Wünnemann, K.; Hecht, L.; Stöffler, D.</p> <p>2016-08-01</p> <p>We directly compare shock zoning (representing shock pressures from ~59 to ~5 GPa) preserved in layered melt particles recovered from <span class="hlt">impact</span> experiments with quartz sand targets with numerical models of crater formation and shock wave attenuation.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016WRR....52.3637L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016WRR....52.3637L"><span id="translatedtitle"><span class="hlt">Impact</span> of kinetic mass transfer on free convection in a <span class="hlt">porous</span> medium</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Lu, Chunhui; Shi, Liangsheng; Chen, Yiming; Xie, Yueqing; Simmons, Craig T.</p> <p>2016-05-01</p> <p>We investigate kinetic mass transfer effects on unstable density-driven flow and transport processes by numerical simulations of a modified Elder problem. The first-order dual-domain mass transfer model coupled with a variable-density-flow model is employed to describe transport behavior in <span class="hlt">porous</span> media. Results show that in comparison to the no-mass-transfer case, a higher degree of instability and more unstable system is developed in the mass transfer case due to the reduced effective porosity and correspondingly a larger Rayleigh number (assuming permeability is independent on the mobile porosity). Given a constant total porosity, the magnitude of capacity ratio (i.e., immobile porosity/mobile porosity) controls the macroscopic plume profile in the mobile domain, while the magnitude of mass transfer timescale (i.e., the reciprocal of the mass transfer rate coefficient) dominates its evolution rate. The magnitude of capacity ratio plays an important role on the mechanism driving the mass flux into the aquifer system. Specifically, for a small capacity ratio, solute loading is dominated by the density-driven transport, while with increasing capacity ratio local mass transfer dominated solute loading may occur at later times. At significantly large times, however, both mechanisms contribute comparably to solute loading. Sherwood Number could be a nonmonotonic function of mass transfer timescale due to complicated interactions of solute between source zone, mobile zone and immobile zone in the top boundary layer, resulting in accordingly a similar behavior of the total mass. The initial assessment provides important insights into unstable density-driven flow and transport in the presence of kinetic mass transfer.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19870014062','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19870014062"><span id="translatedtitle">Centrifuge <span class="hlt">impact</span> cratering experiments: Scaling laws for non-<span class="hlt">porous</span> targets</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Schmidt, Robert M.</p> <p>1987-01-01</p> <p>A geotechnical centrifuge was used to investigate large body <span class="hlt">impacts</span> onto planetary surfaces. At elevated gravity, it is possible to match various dimensionless similarity parameters which were shown to govern large scale <span class="hlt">impacts</span>. Observations of crater growth and target flow fields have provided detailed and critical tests of a complete and unified scaling theory for <span class="hlt">impact</span> cratering. Scaling estimates were determined for nonporous targets. Scaling estimates for large scale cratering in rock proposed previously by others have assumed that the crater radius is proportional to powers of the impactor energy and gravity, with no additional dependence on <span class="hlt">impact</span> velocity. The size scaling laws determined from ongoing centrifuge experiments differ from earlier ones in three respects. First, a distinct dependence of <span class="hlt">impact</span> velocity is recognized, even for constant impactor energy. Second, the present energy exponent for low porosity targets, like competent rock, is lower than earlier estimates. Third, the gravity exponent is recognized here as being related to both the energy and the velocity exponents.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19870014065','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19870014065"><span id="translatedtitle">Centrifuge <span class="hlt">impact</span> cratering experiments: Scaling laws for non-<span class="hlt">porous</span> targets</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Schmidt, Robert M.</p> <p>1987-01-01</p> <p>This research is a continuation of an ongoing program whose objective is to perform experiments and to develop scaling relationships for large body <span class="hlt">impacts</span> onto planetary surfaces. The development of the centrifuge technique has been pioneered by the present investigator and is used to provide experimental data for actual target materials of interest. With both powder and gas guns mounted on a rotor arm, it is possible to match various dimensionless similarity parameters, which have been shown to govern the behavior of large scale <span class="hlt">impacts</span>. Current work is directed toward the determination of scaling estimates for nonporous targets. The results are presented in summary form.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED119874.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED119874.pdf"><span id="translatedtitle">Parent <span class="hlt">Involvement</span> in Day Care: Its <span class="hlt">Impact</span> on Staff and Classroom Environments.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Shapiro, Sylvia</p> <p></p> <p>In this large scale study, the extent of parent <span class="hlt">involvement</span> in preschool day care and its <span class="hlt">impact</span> on staff and on classroom environments in child-centered and adult-centered situations were assessed. Subjects were 15 directors, 30 teachers, 524 children in 30 classrooms. Interview schedules and a classroom observation scale were the two instruments…</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_1");'>1</a></li> <li><a href="#" onclick='return showDiv("page_2");'>2</a></li> <li class="active"><span>3</span></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_3 --> <div id="page_4" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_2");'>2</a></li> <li><a href="#" onclick='return showDiv("page_3");'>3</a></li> <li class="active"><span>4</span></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="61"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=helping+AND+inner+AND+city+AND+youth&id=EJ929579','ERIC'); return false;" href="http://eric.ed.gov/?q=helping+AND+inner+AND+city+AND+youth&id=EJ929579"><span id="translatedtitle">Home and School Factors <span class="hlt">Impacting</span> Parental <span class="hlt">Involvement</span> in a Title I Elementary School</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Bartel, Virginia B.</p> <p>2010-01-01</p> <p>Before and after the interventions of summer classes for parents and an interactive homework program, parents of children in an inner-city southeastern U.S. elementary school were interviewed and teachers surveyed to determine home and school factors that <span class="hlt">impacted</span> parental <span class="hlt">involvement</span> in their children's education. Beliefs about roles and…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=high+AND+involvement+AND+product&pg=7&id=ED552243','ERIC'); return false;" href="http://eric.ed.gov/?q=high+AND+involvement+AND+product&pg=7&id=ED552243"><span id="translatedtitle">Examining Parent <span class="hlt">Involvement</span> Activities in Two Immigrant-<span class="hlt">Impacted</span> Schools: A Comparative Case Study</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Marquez, Amalia</p> <p>2012-01-01</p> <p>K-12 schools with large immigrant populations face a myriad of challenges, including low academic achievement and high dropout rates of Latino students. Parental <span class="hlt">involvement</span> is a practical strategy in positively influencing student outcomes along the K-12 continuum. To this end, it is essential that immigrant <span class="hlt">impacted</span> schools work together with…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2012-title18-vol1/pdf/CFR-2012-title18-vol1-sec33-4.pdf','CFR2012'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2012-title18-vol1/pdf/CFR-2012-title18-vol1-sec33-4.pdf"><span id="translatedtitle">18 CFR 33.4 - Additional information requirements for applications <span class="hlt">involving</span> vertical competitive <span class="hlt">impacts</span>.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2012&page.go=Go">Code of Federal Regulations, 2012 CFR</a></p> <p></p> <p>2012-04-01</p> <p>... 18 Conservation of Power and Water Resources 1 2012-04-01 2012-04-01 false Additional information requirements for applications <span class="hlt">involving</span> vertical competitive <span class="hlt">impacts</span>. 33.4 Section 33.4 Conservation of Power... FEDERAL POWER ACT APPLICATIONS UNDER FEDERAL POWER ACT SECTION 203 § 33.4 Additional...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2010-title18-vol1/pdf/CFR-2010-title18-vol1-sec33-4.pdf','CFR'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2010-title18-vol1/pdf/CFR-2010-title18-vol1-sec33-4.pdf"><span id="translatedtitle">18 CFR 33.4 - Additional information requirements for applications <span class="hlt">involving</span> vertical competitive <span class="hlt">impacts</span>.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2010&page.go=Go">Code of Federal Regulations, 2010 CFR</a></p> <p></p> <p>2010-04-01</p> <p>... 18 Conservation of Power and Water Resources 1 2010-04-01 2010-04-01 false Additional information requirements for applications <span class="hlt">involving</span> vertical competitive <span class="hlt">impacts</span>. 33.4 Section 33.4 Conservation of Power... FEDERAL POWER ACT APPLICATIONS UNDER FEDERAL POWER ACT SECTION 203 § 33.4 Additional...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/10129551','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/10129551"><span id="translatedtitle">Proposed Tenaska Washington II Generation Project : Final Environmental <span class="hlt">Impact</span> Statement. Volume 2: Public <span class="hlt">Involvement</span>.</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>United States. Bonneville Power Administration.</p> <p>1994-01-01</p> <p>In regard to the proposed Tenaska Washington II Generation Project, the goal of the Bonneville Power Administration`s (BPA) Environmental <span class="hlt">Impact</span> Statement (EIS) public <span class="hlt">involvement</span> process is to determine the issues to be examined and pertinent analyses to be conducted and to solicit comments on the content and quality of information presented in the Draft Environmental <span class="hlt">Impact</span> Statement (DEIS). Comments and questions are solicited from the public and government agencies during the scoping process and during the comment period and public hearing on the DEIS, to find out what is of most concern to them. The end product of the public <span class="hlt">involvement</span> process is the Comment Report which follows in part of this volume on Public <span class="hlt">Involvement</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011AIPC.1330...13S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011AIPC.1330...13S"><span id="translatedtitle">Perspectives on <span class="hlt">Porous</span> Media MR in Clinical MRI</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Sigmund, E. E.</p> <p>2011-03-01</p> <p>Many goals and challenges of research in natural or synthetic <span class="hlt">porous</span> media are mirrored in quantitative medical MRI. This review will describe examples where MR techniques used in <span class="hlt">porous</span> media (particularly diffusion-weighted imaging (DWI)) are applied to physiological pathologies. Tissue microstructure is one area with great overlap with <span class="hlt">porous</span> media science. Diffusion-weighting (esp. in neurological tissue) has motivated models with explicit physical dimensions, statistical parameters, empirical descriptors, or hybrids thereof. Another clinically relevant microscopic process is active flow. Renal (kidney) tissue possesses significant active vascular / tubular transport that manifests as "pseudodiffusion." Cancerous lesions <span class="hlt">involve</span> anomalies in both structure and flow. The tools of magnetic resonance and their interpretation in <span class="hlt">porous</span> media has had great <span class="hlt">impact</span> on clinical MRI, and continued cross-fertilization of ideas can only enhance the progress of both fields.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/1446552','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/1446552"><span id="translatedtitle"><span class="hlt">Impact</span> of parenting practices on adolescent achievement: authoritative parenting, school <span class="hlt">involvement</span>, and encouragement to succeed.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Steinberg, L; Lamborn, S D; Dornbusch, S M; Darling, N</p> <p>1992-10-01</p> <p>This article examines the <span class="hlt">impact</span> of authoritative parenting, parental <span class="hlt">involvement</span> in schooling, and parental encouragement to succeed on adolescent school achievement in an ethnically and socio-economically heterogeneous sample of approximately 6,400 American 14-18-year-olds. Adolescents reported in 1987 on their parents' general child-rearing practices and on their parents' achievement-specific socialization behaviors. In 1987, and again in 1988, data were collected on several aspects of the adolescents' school performance and school engagement. Authoritative parenting (high acceptance, supervision, and psychological autonomy granting) leads to better adolescent school performance and stronger school engagement. The positive <span class="hlt">impact</span> of authoritative parenting on adolescent achievement, however, is mediated by the positive effect of authoritativeness on parental <span class="hlt">involvement</span> in schooling. In addition, nonauthoritativeness attenuates the beneficial <span class="hlt">impact</span> of parental <span class="hlt">involvement</span> in schooling on adolescents achievement. Parental <span class="hlt">involvement</span> is much more likely to promote adolescent school success when it occurs in the context of an authoritative home environment. PMID:1446552</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4154307','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4154307"><span id="translatedtitle">Proteomic Analysis of Serum Opsonins <span class="hlt">Impacting</span> Biodistribution and Cellular Association of <span class="hlt">Porous</span> Silicon Microparticles</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Serda, Rita E.; Blanco, Elvin; Mack, Aaron; Stafford, Susan J.; Amra, Sarah; Li, Qingpo; van de Ven, Anne L.; Tanaka, Takemi; Torchilin, Vladimir P.; Wiktorowicz, John E.; Ferrari, Mauro</p> <p>2014-01-01</p> <p>Mass transport of drug delivery vehicles is guided by particle properties, such as shape, composition and surface chemistry, as well as biomolecules and serum proteins that adsorb to the particle surface. In an attempt to identify serum proteins influencing cellular associations and biodistribution of intravascularly injected particles, we used two dimensional gel electrophoresis and mass spectrometry to identify proteins eluted from the surface of cationic and anionic silicon microparticles. Cationic microparticles displayed a 25-fold greater abundance of Ig light chain variable region, fibrinogen, and complement component 1 compared to their anionic counterparts. The anionic-surface favored equal accumulation of microparticles in the liver and spleen, while cationic-surfaces favored preferential accumulation in the spleen. Immunohistochemistry supported macrophage internalization of both anionic and cationic silicon microparticles in the liver, as well as evidence of association of cationic microparticles with hepatic endothelial cells. Furthermore, scanning electron micrographs supported cellular competition for cationic microparticles by endothelial cells and macrophages. Despite high macrophage content in the lungs and tumor, microparticle uptake by these cells was minimal, supporting differences in the repertoire of surface receptors expressed by tissue-specific macrophages. In summary, particle surface chemistry drives selective binding of serum components <span class="hlt">impacting</span> cellular interactions and biodistribution. PMID:21303614</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013EGUGA..15.3023R','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013EGUGA..15.3023R"><span id="translatedtitle"><span class="hlt">Impact</span> of water table fluctuations on water flow and solute transport in different <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Rühle, Franziska; Zentner, Nadine; Stumpp, Christine</p> <p>2013-04-01</p> <p>The interface between saturated and unsaturated zone is dynamic and varies spatially and temporally resulting in fluctuations of the water table. Still, little is known about transport processes under transient flow conditions at this interface and how the processes are affected by altering the water table. In order to understand transport and fate of dissolved contaminants into the groundwater and consequently the quality of groundwater, improved understanding about hydrological processes at the dynamic interface between unsaturated and saturated zone is needed. The objective of this study was to investigate the <span class="hlt">impact</span> of water table fluctuations on one-dimensional vertical flow and solute transport in different sediments. Therefore, flow-through columns (length=50cm, diameter=9cm), filled with glass beads of different grain sizes (smaller=0.4-0.6mm, coarser=1.0-1.5mm), were constantly irrigated at 12 cm/d. Several multi-tracer experiments were conducted with a statically fixed water table and compared to experiments where the water table was fluctuated in upward and downward direction. Data modeling was performed with a lumped parameter model to simulate hydrological fluxes and to determine transport parameters. Our results showed that most tracer breakthrough curves were well simulated indicating that the systems were at steady state. The results showed that under certain hydrological conditions water table fluctuations lead to increased dispersivity. It is suggested that a falling water table can cause increased spreading when the decline is faster than the water flux resulting in a more extensive solute distribution over depth. Further, it was observed that a rising water table can cause higher tracer spreading due to diffusive solute exchange in coarse sediments with immobile water regions. In conclusion, spatial and temporal variability of the interface between vadose zone and groundwater contribute to spreading of solutes and therefore have to be considered</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014PhDT........93H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014PhDT........93H"><span id="translatedtitle">Science homework with video directions for parents: The <span class="hlt">impact</span> on parental <span class="hlt">involvement</span> and academic achievement</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Hooker, Kathy L.</p> <p></p> <p>The benefits of effective parental <span class="hlt">involvement</span> in education have been well documented and can be far reaching. When educators make an effort to <span class="hlt">involve</span> families, parental <span class="hlt">involvement</span> can be even more meaningful. Homework is a commonly practiced and accepted connection between school and home and affords parents many opportunities to interact with their children on educational endeavors. However, parental <span class="hlt">involvement</span> may be limited because educators do not reach out to parents, parents feel their children do not need their help, or parents are unfamiliar with the content and therefore unable to help. The purpose of this study was too develop and implement a tool to enhance parental <span class="hlt">involvement</span> and academic achievement of fourth grade science students. The tool used in this study was a weekly science video to be viewed by parents when it accompanied science homework assignments. To begin, the researcher created six science videos for parents to watch that supplemented weekly homework assignments. Consequently, the researcher set up treatment and comparison groups to test the effectiveness of the supplemental videos in terms of parental <span class="hlt">involvement</span> and academic achievement. A mixed methods approach was used to collect data from parents and students throughout the study. A combination of quantitative and qualitative data was collected throughout this study from both parents and students. Additionally, data was collected from a variety of sources including baseline, midpoint, and endpoint surveys; scores on homework assignments; and focus group interview sessions with parents and students. Data analysis revealed an overall positive <span class="hlt">impact</span> on parental <span class="hlt">involvement</span> and academic achievement when the videos were utilized.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012AIPC.1453..141A','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012AIPC.1453..141A"><span id="translatedtitle">Computational modeling technique for numerical simulation of immiscible two-phase flow problems <span class="hlt">involving</span> flow and transport phenomena in <span class="hlt">porous</span> media with hysteresis</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Abreu, Eduardo; Lambert, Wanderson</p> <p>2012-05-01</p> <p>Numerical methods are necessary, and are extremely important, in developing an understanding of the dynamics of multiphase flow of fluids in <span class="hlt">porous</span> media applications to maximize hydrocarbon recovery as well as to simulate contaminant transport of soluble or insoluble species in groundwater contamination problems. This work deals with a problem very common in water-flooding process in petroleum reservoir to motivate the proposed modeling: the flow of two immiscible and incompressible fluid phases. The system of equations which describe this type of flow is a coupled, highly nonlinear system of time-dependent partial differential equations. The equation for the invading fluid (e.g., water phase) is a convection-dominated, degenerate parabolic partial differential equation whose solutions typically exhibit sharp moving fronts (e.g., moving internal layers with strong gradients) and it is very difficult to approximate numerically. We propose a two-stage numerical method to describe the injection problem for a model of two-phase (water-oil) flow in a <span class="hlt">porous</span> rock, taking into account both gravity and hysteresis effects for solving transport flow problems in <span class="hlt">porous</span> media. Indeed, we also investigate the Riemann problem for the one-dimensional, purely hyperbolic system, associated to the full differential model problem at hand. Thus, the use of accurate numerical methods in conjunction with one-dimensional semi-analytical Riemann solutions might provide valuable insight into the qualitative solution behavior of the full nonlinear governing flow system.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26407854','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26407854"><span id="translatedtitle">A Research Framework for Understanding the Practical <span class="hlt">Impact</span> of Family <span class="hlt">Involvement</span> in the Juvenile Justice System: The Juvenile Justice Family <span class="hlt">Involvement</span> Model.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Walker, Sarah Cusworth; Bishop, Asia S; Pullmann, Michael D; Bauer, Grace</p> <p>2015-12-01</p> <p>Family <span class="hlt">involvement</span> is recognized as a critical element of service planning for children's mental health, welfare and education. For the juvenile justice system, however, parents' roles in this system are complex due to youths' legal rights, public safety, a process which can legally position parents as plaintiffs, and a historical legacy of blaming parents for youth indiscretions. Three recent national surveys of juvenile justice-<span class="hlt">involved</span> parents reveal that the current paradigm elicits feelings of stress, shame and distrust among parents and is likely leading to worse outcomes for youth, families and communities. While research on the <span class="hlt">impact</span> of family <span class="hlt">involvement</span> in the justice system is starting to emerge, the field currently has no organizing framework to guide a research agenda, interpret outcomes or translate findings for practitioners. We propose a research framework for family <span class="hlt">involvement</span> that is informed by a comprehensive review and content analysis of current, published arguments for family <span class="hlt">involvement</span> in juvenile justice along with a synthesis of family <span class="hlt">involvement</span> efforts in other child-serving systems. In this model, family <span class="hlt">involvement</span> is presented as an ascending, ordinal concept beginning with (1) exclusion, and moving toward climates characterized by (2) information-giving, (3) information-eliciting and (4) full, decision-making partnerships. Specific examples of how courts and facilities might align with these levels are described. Further, the model makes predictions for how <span class="hlt">involvement</span> will <span class="hlt">impact</span> outcomes at multiple levels with applications for other child-serving systems. PMID:26407854</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26407854','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26407854"><span id="translatedtitle">A Research Framework for Understanding the Practical <span class="hlt">Impact</span> of Family <span class="hlt">Involvement</span> in the Juvenile Justice System: The Juvenile Justice Family <span class="hlt">Involvement</span> Model.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Walker, Sarah Cusworth; Bishop, Asia S; Pullmann, Michael D; Bauer, Grace</p> <p>2015-12-01</p> <p>Family <span class="hlt">involvement</span> is recognized as a critical element of service planning for children's mental health, welfare and education. For the juvenile justice system, however, parents' roles in this system are complex due to youths' legal rights, public safety, a process which can legally position parents as plaintiffs, and a historical legacy of blaming parents for youth indiscretions. Three recent national surveys of juvenile justice-<span class="hlt">involved</span> parents reveal that the current paradigm elicits feelings of stress, shame and distrust among parents and is likely leading to worse outcomes for youth, families and communities. While research on the <span class="hlt">impact</span> of family <span class="hlt">involvement</span> in the justice system is starting to emerge, the field currently has no organizing framework to guide a research agenda, interpret outcomes or translate findings for practitioners. We propose a research framework for family <span class="hlt">involvement</span> that is informed by a comprehensive review and content analysis of current, published arguments for family <span class="hlt">involvement</span> in juvenile justice along with a synthesis of family <span class="hlt">involvement</span> efforts in other child-serving systems. In this model, family <span class="hlt">involvement</span> is presented as an ascending, ordinal concept beginning with (1) exclusion, and moving toward climates characterized by (2) information-giving, (3) information-eliciting and (4) full, decision-making partnerships. Specific examples of how courts and facilities might align with these levels are described. Further, the model makes predictions for how <span class="hlt">involvement</span> will <span class="hlt">impact</span> outcomes at multiple levels with applications for other child-serving systems.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/960957','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/960957"><span id="translatedtitle">Seismic stress mobilization of natural colloids in a <span class="hlt">porous</span> rock</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Roberts, Peter M; Abdel-fattah, Amr I</p> <p>2008-01-01</p> <p>Stress oscillations at 26 Hz enhanced the release of natural micro-particles (colloids) in a <span class="hlt">porous</span> rock sample. Micron-scale effects were induced by meter-scale wavelengths. The results are attributed to altering the release rate coefficient for colloids trapped in pores. The rate change did not depend on colloid size and thus is not due to altering colloid-pore-wall interactions. Enhanced colloid detachment from pore walls and flushing from dead-end pores are likely mechanisms. This phenomenon could <span class="hlt">impact</span> a broad range of physical sciences <span class="hlt">involving</span> colloid dynamics and <span class="hlt">porous</span> transport.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/27609276','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/27609276"><span id="translatedtitle">Thymus <span class="hlt">involvement</span> in myasthenia gravis: Epidemiological and clinical <span class="hlt">impacts</span> of different self-tolerance breakdown mechanisms.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Karni, Arnon; Asmail, Ali; Drory, Vivian E; Kolb, Hadar; Kesler, Anat</p> <p>2016-09-15</p> <p>The reasons for the abrogation of self-immunological tolerance in patients with myasthenia gravis (MG) may be different between those with concomitant thymic hyperplasia or thymoma, and those with no evidence of thymic <span class="hlt">involvement</span>. We conducted a retrospective observational case series study to investigate the epidemiology as well as the clinical, serologic, and electromyographic (EMG) characteristics of individuals diagnosed as having MG. We found that the average age at MG onset of patients with either thymic hyperplasia or thymoma was much younger (by ~20years) than that of MG patients without thymic <span class="hlt">involvement</span>. Thymic hyperplasia was more common in females than males. There were no differences in the rates of ocular MG vs. generalized MG among those three study groups. There were also no group differences in the rates of neuromuscular junction disfunction, as observed on EMG or by the results of serology tests for acetyl choline receptor antibody. Interestingly, only patients without thymic <span class="hlt">involvement</span> had other autoimmune diseases, and most of them were females. The patients with other coexisting autoimmune disease had a similar age at MG onset as the other patients with no thymic <span class="hlt">involvement</span>. These results shed light on the <span class="hlt">impact</span> of epidemiological and clinical factors that result from different mechanisms of self-immunological tolerance breakdown that occurs in MG. PMID:27609276</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27609276','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27609276"><span id="translatedtitle">Thymus <span class="hlt">involvement</span> in myasthenia gravis: Epidemiological and clinical <span class="hlt">impacts</span> of different self-tolerance breakdown mechanisms.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Karni, Arnon; Asmail, Ali; Drory, Vivian E; Kolb, Hadar; Kesler, Anat</p> <p>2016-09-15</p> <p>The reasons for the abrogation of self-immunological tolerance in patients with myasthenia gravis (MG) may be different between those with concomitant thymic hyperplasia or thymoma, and those with no evidence of thymic <span class="hlt">involvement</span>. We conducted a retrospective observational case series study to investigate the epidemiology as well as the clinical, serologic, and electromyographic (EMG) characteristics of individuals diagnosed as having MG. We found that the average age at MG onset of patients with either thymic hyperplasia or thymoma was much younger (by ~20years) than that of MG patients without thymic <span class="hlt">involvement</span>. Thymic hyperplasia was more common in females than males. There were no differences in the rates of ocular MG vs. generalized MG among those three study groups. There were also no group differences in the rates of neuromuscular junction disfunction, as observed on EMG or by the results of serology tests for acetyl choline receptor antibody. Interestingly, only patients without thymic <span class="hlt">involvement</span> had other autoimmune diseases, and most of them were females. The patients with other coexisting autoimmune disease had a similar age at MG onset as the other patients with no thymic <span class="hlt">involvement</span>. These results shed light on the <span class="hlt">impact</span> of epidemiological and clinical factors that result from different mechanisms of self-immunological tolerance breakdown that occurs in MG.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25054173','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25054173"><span id="translatedtitle"><span class="hlt">Impact</span> of heat and mass transfer during the transport of nitrogen in coal <span class="hlt">porous</span> media on coal mine fires.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Shi, Bobo; Zhou, Fubao</p> <p>2014-01-01</p> <p>The application of liquid nitrogen injection is an important technique in the field of coal mine fire prevention. However, the mechanism of heat and mass transfer of cryogenic nitrogen in the goaf <span class="hlt">porous</span> medium has not been well accessed. Hence, the implementation of fire prevention engineering of liquid nitrogen roughly relied on an empirical view. According to the research gap in this respect, an experimental study on the heat and mass transfer of liquid nitrogen in coal <span class="hlt">porous</span> media was proposed. Overall, the main mechanism of liquid nitrogen fire prevention technology in the coal mine is the creation of an inert and cryogenic atmosphere. Cryogenic nitrogen gas vapor cloud, heavier than the air, would cause the phenomenon of "gravity settling" in <span class="hlt">porous</span> media firstly. The cryogen could be applicable to diverse types of fires, both in the openings and in the enclosures. Implementation of liquid nitrogen open-injection technique in Yangchangwan colliery achieved the goals of fire prevention and air-cooling. Meanwhile, this study can also provide an essential reference for the research on heat and mass transfer in <span class="hlt">porous</span> media in the field of thermal physics and engineering.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/5895210','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/5895210"><span id="translatedtitle">Factors <span class="hlt">involved</span> in evaluating ground water <span class="hlt">impacts</span> of deep coal mine drainage</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Davis, P.R.; Walton, W.C.</p> <p>1982-10-01</p> <p>The determination of probable ground water <span class="hlt">impacts</span> of proposed deep coal mining is required as part of permit applications in the US. <span class="hlt">Impact</span> prediction generally <span class="hlt">involves</span> well production test analysis and modeling of ground water systems associated with coal seams. Well production tests are often complicated due to the relatively low permeabilities of sandstones and shales of ground water systems. The effects of the release of water stored within finite diameter production wells must be considered. Well storage capacity appreciably affects early well production test time drawdown or time recovery data. Low pumping rates, limited cones of depression, and length of required pumping periods are important well production test design factors. Coal seam ground water system models are usually multilayered and leaky artesian. Mine drafts partially penetrate the ground water system. Simulation of coal mine drainage often <span class="hlt">involves</span> the horizontal permeability and storage coefficient of the coal seam zone, vertical permeabilities of sandstones and shales (aquitard) above and below the coal seam zone, and the hydrologic properties of the source bed above the aquitard overlying the coal seam zone.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2005JAP....97k3302C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2005JAP....97k3302C"><span id="translatedtitle"><span class="hlt">Impact</span> of reductive N2/H2 plasma on <span class="hlt">porous</span> low-dielectric constant SiCOH thin films</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Cui, Hao; Carter, Richard J.; Moore, Darren L.; Peng, Hua-Gen; Gidley, David W.; Burke, Peter A.</p> <p>2005-06-01</p> <p><span class="hlt">Porous</span> low-dielectric constant (low-κ) SiCOH thin films deposited using a plasma-enhanced chemical-vapor deposition have been comprehensively characterized before and after exposure to a reactive-ion-etch-type plasma of N2 and H2 chemistry. The low-κ film studied in this work is a carbon-doped silicon oxide film with a dielectric constant (κ) of 2.5. Studies show that a top dense layer is formed as a result of significant surface film densification after exposure to N2/H2 plasma while the underlying bulk layer remains largely unchanged. The top dense layer is found to seal the <span class="hlt">porous</span> bulk SiCOH film. SiCOH films experienced significant thickness reduction, κ increase, and leakage current degradation after plasma exposure, accompanied by density increase, pore collapse, carbon depletion, and moisture content increase in the top dense layer. Both film densification and removal processes during N2/H2 plasma treatment were found to play important roles in the thickness reduction and κ increase of this <span class="hlt">porous</span> low-κ SiCOH film. A model based upon mutually limiting film densification and removal processes is proposed for the continuous thickness reduction during plasma exposure. A combination of surface film densification, thickness ratio increase of top dense layer to bulk layer, and moisture content increase results in the increase in κ value of this SiCOH film.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22456537','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22456537"><span id="translatedtitle">Differential <span class="hlt">impact</span> of REM sleep deprivation on cytoskeletal proteins of brain regions <span class="hlt">involved</span> in sleep regulation.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Rodríguez-Vázquez, Jennifer; Camacho-Arroyo, Ignacio; Velázquez-Moctezuma, Javier</p> <p>2012-01-01</p> <p>Rapid eye movement (REM) sleep is <span class="hlt">involved</span> in memory consolidation, which implies synaptic plasticity. This process requires protein synthesis and the reorganization of the neural cytoskeleton. REM sleep deprivation (REMSD) has an <span class="hlt">impact</span> on some neuronal proteins <span class="hlt">involved</span> in synaptic plasticity, such as glutamate receptors and postsynaptic density protein 95, but its effects on cytoskeletal proteins is unknown. In this study, the effects of REMSD on the content of the cytoskeletal proteins MAP2 and TAU were analyzed. Adult female rats were submitted to selective REMSD by using the multiple platform technique. After 24, 48 or 72 h of REMSD, rats were decapitated and the following brain areas were dissected: pons, preoptic area, hippocampus and frontal cortex. Protein extraction and Western blot were performed. Results showed an increase in TAU content in the pons, preoptic area and hippocampus after 24 h of REMSD, while in the frontal cortex a significant increase in TAU content was observed after 72 h of REMSD. A TAU content decrease was observed in the hippocampus after 48 h of REMSD. Interestingly, a marked increase in TAU content was observed after 72 h of REMSD. MAP2 content only increased in the preoptic area at 24 h, and in the frontal cortex after 24 and 72 h of REMSD, without significant changes in the pons and hippocampus. These results support the idea that REM sleep plays an important role in the organization of neural cytoskeleton, and that this effect is tissue-specific.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_2");'>2</a></li> <li><a href="#" onclick='return showDiv("page_3");'>3</a></li> <li class="active"><span>4</span></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_4 --> <div id="page_5" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_3");'>3</a></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li class="active"><span>5</span></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="81"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=sss&pg=2&id=ED517488','ERIC'); return false;" href="http://eric.ed.gov/?q=sss&pg=2&id=ED517488"><span id="translatedtitle">The Role of Student Support Services in Encouraging Student <span class="hlt">Involvement</span> and Its <span class="hlt">Impact</span> on Student Perceptions and Academic Experiences</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Kelley-Hall, Caren</p> <p>2010-01-01</p> <p>The purpose of this study was to explore the role of Student Support Services (SSS) in encouraging student <span class="hlt">involvement</span> and its <span class="hlt">impact</span> on student perceptions and academic experiences in three technical colleges in upstate South Carolina. By examining Alexander Astin's theory of student <span class="hlt">involvement</span> in the services provided by the program, a better…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27030954','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27030954"><span id="translatedtitle">Numerical modelling of biophysicochemical effects on multispecies reactive transport in <span class="hlt">porous</span> media <span class="hlt">involving</span> Pseudomonas putida for potential microbial enhanced oil recovery application.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Sivasankar, P; Rajesh Kanna, A; Suresh Kumar, G; Gummadi, Sathyanarayana N</p> <p>2016-07-01</p> <p>pH and resident time of injected slug plays a critical role in characterizing the reservoir for potential microbial enhanced oil recovery (MEOR) application. To investigate MEOR processes, a multispecies (microbes-nutrients) reactive transport model in <span class="hlt">porous</span> media was developed by coupling kinetic and transport model. The present work differs from earlier works by explicitly determining parametric values required for kinetic model by experimental investigations using Pseudomonas putida at different pH conditions and subsequently performing sensitivity analysis of pH, resident time and water saturation on concentrations of microbes, nutrients and biosurfactant within reservoir. The results suggest that nutrient utilization and biosurfactant production are found to be maximum at pH 8 and 7.5 respectively. It is also found that the sucrose and biosurfactant concentrations are highly sensitive to pH rather than reservoir microbial concentration, while at larger resident time and water saturation, the microbial and nutrient concentrations were lesser due to enhanced dispersion.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/872975','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/872975"><span id="translatedtitle">Rigid <span class="hlt">porous</span> filter</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Chiang, Ta-Kuan; Straub, Douglas L.; Dennis, Richard A.</p> <p>2000-01-01</p> <p>The present invention <span class="hlt">involves</span> a <span class="hlt">porous</span> rigid filter including a plurality of concentric filtration elements having internal flow passages and forming external flow passages there between. The present invention also <span class="hlt">involves</span> a pressure vessel containing the filter for the removal of particulates from high pressure particulate containing gases, and further <span class="hlt">involves</span> a method for using the filter to remove such particulates. The present filter has the advantage of requiring fewer filter elements due to the high surface area-to-volume ratio provided by the filter, requires a reduced pressure vessel size, and exhibits enhanced mechanical design properties, improved cleaning properties, configuration options, modularity and ease of fabrication.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26501893','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26501893"><span id="translatedtitle">Gatekeeping and its <span class="hlt">impact</span> on father <span class="hlt">involvement</span> among Black South Africans in rural KwaZulu-Natal.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Makusha, Tawanda; Richter, Linda</p> <p>2016-01-01</p> <p><span class="hlt">Involved</span> and caring fatherhood contributes to the health and wellbeing of children, women and men. The corollary is also true - men, women and children are affected when fathers are not <span class="hlt">involved</span> or supportive of their children. Many factors affect fathers' <span class="hlt">involvement</span>, including women's attitudes, the history and nature of the relationship between mother and father, and the cultural context. This study explores gatekeeping and its <span class="hlt">impact</span> on father <span class="hlt">involvement</span> among Black South Africans in rural KwaZulu-Natal. Among married couples, gatekeeping occurs with respect to childcare and housework through women's attempts to validate their maternal identity according to socially and culturally constructed gender roles. Among unmarried, non-resident parents, women control father-child contact and <span class="hlt">involvement</span>, with mothers and/or their families either facilitating or inhibiting father <span class="hlt">involvement</span>. In this context, we found that cultural gatekeeping had a huge <span class="hlt">impact</span> on father <span class="hlt">involvement</span>, with the non-payment of inhlawulo or lobola regulating father-child <span class="hlt">involvement</span>. In a country like South Africa, where there is high non-marital fertility and father-child non-residence, future research, parenting and family programmes should focus on strategies that encourage positive paternal <span class="hlt">involvement</span> as well as maternal and cultural support for father <span class="hlt">involvement</span>, regardless of parental relationship and residence status.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26501893','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26501893"><span id="translatedtitle">Gatekeeping and its <span class="hlt">impact</span> on father <span class="hlt">involvement</span> among Black South Africans in rural KwaZulu-Natal.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Makusha, Tawanda; Richter, Linda</p> <p>2016-01-01</p> <p><span class="hlt">Involved</span> and caring fatherhood contributes to the health and wellbeing of children, women and men. The corollary is also true - men, women and children are affected when fathers are not <span class="hlt">involved</span> or supportive of their children. Many factors affect fathers' <span class="hlt">involvement</span>, including women's attitudes, the history and nature of the relationship between mother and father, and the cultural context. This study explores gatekeeping and its <span class="hlt">impact</span> on father <span class="hlt">involvement</span> among Black South Africans in rural KwaZulu-Natal. Among married couples, gatekeeping occurs with respect to childcare and housework through women's attempts to validate their maternal identity according to socially and culturally constructed gender roles. Among unmarried, non-resident parents, women control father-child contact and <span class="hlt">involvement</span>, with mothers and/or their families either facilitating or inhibiting father <span class="hlt">involvement</span>. In this context, we found that cultural gatekeeping had a huge <span class="hlt">impact</span> on father <span class="hlt">involvement</span>, with the non-payment of inhlawulo or lobola regulating father-child <span class="hlt">involvement</span>. In a country like South Africa, where there is high non-marital fertility and father-child non-residence, future research, parenting and family programmes should focus on strategies that encourage positive paternal <span class="hlt">involvement</span> as well as maternal and cultural support for father <span class="hlt">involvement</span>, regardless of parental relationship and residence status. PMID:26501893</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015NatSR...510900X','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015NatSR...510900X"><span id="translatedtitle">Systematic Analysis of the Genetic Variability That <span class="hlt">Impacts</span> SUMO Conjugation and Their <span class="hlt">Involvement</span> in Human Diseases</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Xu, Hao-Dong; Shi, Shao-Ping; Chen, Xiang; Qiu, Jian-Ding</p> <p>2015-07-01</p> <p>Protein function has been observed to rely on select essential sites instead of requiring all sites to be indispensable. Small ubiquitin-related modifier (SUMO) conjugation or sumoylation, which is a highly dynamic reversible process and its outcomes are extremely diverse, ranging from changes in localization to altered activity and, in some cases, stability of the modified, has shown to be especially valuable in cellular biology. Motivated by the significance of SUMO conjugation in biological processes, we report here on the first exploratory assessment whether sumoylation related genetic variability <span class="hlt">impacts</span> protein functions as well as the occurrence of diseases related to SUMO. Here, we defined the SUMOAMVR as sumoylation related amino acid variations that affect sumoylation sites or enzymes <span class="hlt">involved</span> in the process of connectivity, and categorized four types of potential SUMOAMVRs. We detected that 17.13% of amino acid variations are potential SUMOAMVRs and 4.83% of disease mutations could lead to SUMOAMVR with our system. More interestingly, the statistical analysis demonstrates that the amino acid variations that directly create new potential lysine sumoylation sites are more likely to cause diseases. It can be anticipated that our method can provide more instructive guidance to identify the mechanisms of genetic diseases.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=volunteering&pg=5&id=ED558305','ERIC'); return false;" href="http://eric.ed.gov/?q=volunteering&pg=5&id=ED558305"><span id="translatedtitle">The <span class="hlt">Impact</span> of Elementary Teachers' Perceptions and Practices to Promote Parental <span class="hlt">Involvement</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Lattimore, Myra T.</p> <p>2013-01-01</p> <p>Parental <span class="hlt">involvement</span>, defined as the educational engagement of parents in activities such as <span class="hlt">involvement</span> in PTA, volunteering, and Science/Math night, promotes academic success. Lack of parental <span class="hlt">involvement</span> is associated with lower academic performance. The purpose of this correlational study was to determine the relationship between parent…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Endpoint&pg=5&id=ED557531','ERIC'); return false;" href="http://eric.ed.gov/?q=Endpoint&pg=5&id=ED557531"><span id="translatedtitle">Science Homework with Video Directions for Parents: The <span class="hlt">Impact</span> on Parental <span class="hlt">Involvement</span> and Academic Achievement</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Hooker, Kathy L.</p> <p>2014-01-01</p> <p>The benefits of effective parental <span class="hlt">involvement</span> in education have been well documented and can be far reaching. When educators make an effort to <span class="hlt">involve</span> families, parental <span class="hlt">involvement</span> can be even more meaningful. Homework is a commonly practiced and accepted connection between school and home and affords parents many opportunities to interact with…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=69633&keyword=effect+AND+enzymes&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50&CFID=79059160&CFTOKEN=60568133','EPA-EIMS'); return false;" href="http://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=69633&keyword=effect+AND+enzymes&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50&CFID=79059160&CFTOKEN=60568133"><span id="translatedtitle">BIODEGRADATION DURING CONTAMINANT TRANSPORT IN <span class="hlt">POROUS</span> MEDIA. 4. <span class="hlt">IMPACT</span> OF MICROBIAL LAG AND BACTERIAL CELL GROWTH. (R825415)</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p><h2>Abstract</h2><p>Miscible-displacement experiments were conducted to examine the <span class="hlt">impact</span> of microbial lag and bacterial cell growth on the transport of salicylate, a model hydrocarbon compound. The <span class="hlt">impacts</span> of these processes were examined separately, as well as jointly, to dete...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/25325703','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/25325703"><span id="translatedtitle"><span class="hlt">Impact</span> of redox-active polymer molecular weight on the electrochemical properties and transport across <span class="hlt">porous</span> separators in nonaqueous solvents.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Nagarjuna, Gavvalapalli; Hui, Jingshu; Cheng, Kevin J; Lichtenstein, Timothy; Shen, Mei; Moore, Jeffrey S; Rodríguez-López, Joaquín</p> <p>2014-11-19</p> <p>Enhancing the ionic conductivity across the electrolyte separator in nonaqueous redox flow batteries (NRFBs) is essential for improving their performance and enabling their widespread utilization. Separating redox-active species by size exclusion without greatly impeding the transport of supporting electrolyte is a potentially powerful alternative to the use of poorly performing ion-exchange membranes. However, this strategy has not been explored possibly due to the lack of suitable redox-active species that are easily varied in size, remain highly soluble, and exhibit good electrochemical properties. Here we report the synthesis, electrochemical characterization, and transport properties of redox-active poly(vinylbenzyl ethylviologen) (RAPs) with molecular weights between 21 and 318 kDa. The RAPs reported here show very good solubility (up to at least 2.0 M) in acetonitrile and propylene carbonate. Ultramicroelectrode voltammetry reveals facile electron transfer with E1/2 ∼ -0.7 V vs Ag/Ag(+)(0.1 M) for the viologen 2+/+ reduction at concentrations as high as 1.0 M in acetonitrile. Controlled potential bulk electrolysis indicates that 94-99% of the nominal charge on different RAPs is accessible and that the electrolysis products are stable upon cycling. The dependence of the diffusion coefficient on molecular weight suggests the adequacy of the Stokes-Einstein formalism to describe RAPs. The size-selective transport properties of LiBF4 and RAPs across commercial off-the-shelf (COTS) separators such as Celgard 2400 and Celgard 2325 were tested. COTS <span class="hlt">porous</span> separators show ca. 70 times higher selectivity for charge balancing ions (Li(+)BF4(-)) compared to high molecular weight RAPs. RAPs rejection across these separators showed a strong dependence on polymer molecular weight as well as the pore size; the rejection increased with both increasing polymer molecular weight and reduction in pore size. Significant rejection was observed even for rpoly/rpore (polymer</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25325703','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25325703"><span id="translatedtitle"><span class="hlt">Impact</span> of redox-active polymer molecular weight on the electrochemical properties and transport across <span class="hlt">porous</span> separators in nonaqueous solvents.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Nagarjuna, Gavvalapalli; Hui, Jingshu; Cheng, Kevin J; Lichtenstein, Timothy; Shen, Mei; Moore, Jeffrey S; Rodríguez-López, Joaquín</p> <p>2014-11-19</p> <p>Enhancing the ionic conductivity across the electrolyte separator in nonaqueous redox flow batteries (NRFBs) is essential for improving their performance and enabling their widespread utilization. Separating redox-active species by size exclusion without greatly impeding the transport of supporting electrolyte is a potentially powerful alternative to the use of poorly performing ion-exchange membranes. However, this strategy has not been explored possibly due to the lack of suitable redox-active species that are easily varied in size, remain highly soluble, and exhibit good electrochemical properties. Here we report the synthesis, electrochemical characterization, and transport properties of redox-active poly(vinylbenzyl ethylviologen) (RAPs) with molecular weights between 21 and 318 kDa. The RAPs reported here show very good solubility (up to at least 2.0 M) in acetonitrile and propylene carbonate. Ultramicroelectrode voltammetry reveals facile electron transfer with E1/2 ∼ -0.7 V vs Ag/Ag(+)(0.1 M) for the viologen 2+/+ reduction at concentrations as high as 1.0 M in acetonitrile. Controlled potential bulk electrolysis indicates that 94-99% of the nominal charge on different RAPs is accessible and that the electrolysis products are stable upon cycling. The dependence of the diffusion coefficient on molecular weight suggests the adequacy of the Stokes-Einstein formalism to describe RAPs. The size-selective transport properties of LiBF4 and RAPs across commercial off-the-shelf (COTS) separators such as Celgard 2400 and Celgard 2325 were tested. COTS <span class="hlt">porous</span> separators show ca. 70 times higher selectivity for charge balancing ions (Li(+)BF4(-)) compared to high molecular weight RAPs. RAPs rejection across these separators showed a strong dependence on polymer molecular weight as well as the pore size; the rejection increased with both increasing polymer molecular weight and reduction in pore size. Significant rejection was observed even for rpoly/rpore (polymer</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015WRR....51.9094G','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015WRR....51.9094G"><span id="translatedtitle">The <span class="hlt">impact</span> of pore structure and surface roughness on capillary trapping for 2-D and 3-D <span class="hlt">porous</span> media: Comparison with percolation theory</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Geistlinger, Helmut; Ataei-Dadavi, Iman; Mohammadian, Sadjad; Vogel, Hans-Jörg</p> <p>2015-11-01</p> <p>We study the <span class="hlt">impact</span> of pore structure and surface roughness on capillary trapping of nonwetting gas phase during imbibition with water for capillary numbers between 10-7 and 5 × 10-5, within glass beads, natural sands, glass beads monolayers, and 2-D micromodels. The materials exhibit different roughness of the pore-solid interface. We found that glass beads and natural sands, which exhibit nearly the same grain size distribution, pore size distribution, and connectivity, showed a significant difference of the trapped gas phase of about 15%. This difference can be explained by the microstructure of the pore-solid interface. Based on the visualization of the trapping dynamics within glass beads monolayers and 2-D micromodels, we could show that bypass trapping controls the trapping process in glass beads monolayers, while snap-off trapping controls the trapping process in 2-D micromodels. We conclude that these different trapping processes are the reason for the different trapping efficiency, when comparing glass beads packs with natural sand packs. Moreover, for small capillary numbers of 10-6, we found that the cluster size distribution of trapped gas clusters of all 2-D and 3-D <span class="hlt">porous</span> media can be described by a universal power law behavior predicted from percolation theory. This cannot be expected a priori for 2-D <span class="hlt">porous</span> media, because bicontinuity of the two bulk phases is violated. Obviously, bicontinuity holds for the thin-film water phase and the bulk gas phase. The snap-off trapping process leads to ordinary bond percolation in front of the advancing bulk water phase and is the reason for the observed universal power law behavior in 2-D micromodels with rough surfaces.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=social+AND+support&pg=6&id=EJ1063771','ERIC'); return false;" href="http://eric.ed.gov/?q=social+AND+support&pg=6&id=EJ1063771"><span id="translatedtitle">Who Can Help Working Students? The <span class="hlt">Impact</span> of Graduate School <span class="hlt">Involvement</span> and Social Support on School-Work Facilitation</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Wyland, Rebecca L.; Winkel, Doan E.; Lester, Scott W.; Hanson-Rasmussen, Nancy</p> <p>2015-01-01</p> <p>A significant number of employees attend graduate school, and the <span class="hlt">impact</span> of the student role may be substantial and valuable to the work-life literature. In this study the authors examine whether psychological <span class="hlt">involvement</span> in graduate school increases school-work facilitation. Further, they suggest that employers and graduate schools can provide…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=%22Mixing+of+concrete%22+OR+Mortars&id=ED546183','ERIC'); return false;" href="http://eric.ed.gov/?q=%22Mixing+of+concrete%22+OR+Mortars&id=ED546183"><span id="translatedtitle">The <span class="hlt">Impact</span> of <span class="hlt">Involvement</span> in Mortar Board Senior Honor Society on Lifelong Views of Civic Engagement and Leadership</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Turner, Daniel James</p> <p>2012-01-01</p> <p>This study examines the <span class="hlt">impact</span> that <span class="hlt">involvement</span> in Mortar Board National Senior Honor Society has on lifelong views of civic engagement and leadership. Mortar Board Senior Honor Society is a collegiate honor society established in 1918 that recognizes students for their outstanding contributions to their college or university community in the…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1013030','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1013030"><span id="translatedtitle">Variably <span class="hlt">porous</span> structures</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Braun, Paul V.; Yu, Xindi</p> <p>2011-01-18</p> <p>A method of making a monolithic <span class="hlt">porous</span> structure, comprises electrodepositing a material on a template; removing the template from the material to form a monolithic <span class="hlt">porous</span> structure comprising the material; and electropolishing the monolithic <span class="hlt">porous</span> structure.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016Icar..268..102M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016Icar..268..102M"><span id="translatedtitle">Survivability of copper projectiles during hypervelocity <span class="hlt">impacts</span> in <span class="hlt">porous</span> ice: A laboratory investigation of the survivability of projectiles <span class="hlt">impacting</span> comets or other bodies</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>McDermott, K. H.; Price, M. C.; Cole, M.; Burchell, M. J.</p> <p>2016-04-01</p> <p>During hypervelocity <span class="hlt">impact</span> (>a few km s-1) the resulting cratering and/or disruption of the target body often outweighs interest on the outcome of the projectile material, with the majority of projectiles assumed to be vaporised. However, on Earth, fragments, often metallic, have been recovered from <span class="hlt">impact</span> sites, meaning that metallic projectile fragments may survive a hypervelocity <span class="hlt">impact</span> and still exist within the wall, floor and/or ejecta of the <span class="hlt">impact</span> crater post-<span class="hlt">impact</span>. The discovery of the remnant impactor composition within the craters of asteroids, planets and comets could provide further information regarding the <span class="hlt">impact</span> history of a body. Accordingly, we study in the laboratory the survivability of 1 and 2 mm diameter copper projectiles fired onto ice at speeds between 1.00 and 7.05 km s-1. The projectile was recovered intact at speeds up to 1.50 km s-1, with no ductile deformation, but some surface pitting was observed. At 2.39 km s-1, the projectile showed increasing ductile deformation and broke into two parts. Above velocities of 2.60 km s-1 increasing numbers of projectile fragments were identified post <span class="hlt">impact</span>, with the mean size of the fragments decreasing with increasing <span class="hlt">impact</span> velocity. The decrease in size also corresponds with an increase in the number of projectile fragments recovered, as with increasing shock pressure the projectile material is more intensely disrupted, producing smaller and more numerous fragments. The damage to the projectile is divided into four classes with increasing speed and shock pressure: (1) minimal damage, (2) ductile deformation, start of break up, (3) increasing fragmentation, and (4) complete fragmentation. The implications of such behaviour is considered for specific examples of <span class="hlt">impacts</span> of metallic impactors onto Solar System bodies, including LCROSS <span class="hlt">impacting</span> the Moon, iron meteorites onto Mars and NASA's "Deep <span class="hlt">Impact</span>" mission where a spacecraft <span class="hlt">impacted</span> a comet.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/FR-2011-12-09/pdf/2011-31690.pdf','FEDREG'); return false;" href="https://www.gpo.gov/fdsys/pkg/FR-2011-12-09/pdf/2011-31690.pdf"><span id="translatedtitle">76 FR 76935 - <span class="hlt">Impact</span> of Implementing the Chemical Weapons Convention (CWC) on Commercial Activities <span class="hlt">Involving</span>...</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collection.action?collectionCode=FR">Federal Register 2010, 2011, 2012, 2013, 2014</a></p> <p></p> <p>2011-12-09</p> <p>... Bureau of Industry and Security <span class="hlt">Impact</span> of Implementing the Chemical Weapons Convention (CWC) on... implementation of the Chemical Weapons Convention (CWC), through the Chemical Weapons Convention Implementation Act (CWCIA), and the Chemical Weapons Convention Regulations (CWCR), has had on commercial...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25894592','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25894592"><span id="translatedtitle"><span class="hlt">Impact</span> of home care management on the <span class="hlt">involvement</span> of informal caregivers by formal caregivers.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>van Wieringen, Marieke; Broese van Groenou, Marjolein I; Groenewegen, Peter</p> <p>2015-01-01</p> <p>This study explores the link between management characteristics of home care agencies and the <span class="hlt">involvement</span> of informal caregivers in caregiving. Based on a study of policy documents of two agencies and semi-structured interviews with five team managers and 31 formal caregivers, we conclude that, although the importance of <span class="hlt">involving</span> informal caregivers is emphasized in official documentation, actual contact with informal caregivers is often lacking. Comparison of the work processes of the two agencies shows that contact with informal caregivers and their potential <span class="hlt">involvement</span> are enhanced by smaller teams, less task division, and clarity about the responsibilities of formal caregivers.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3755281','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3755281"><span id="translatedtitle"><span class="hlt">Porous</span> Carbon Nanoparticle Networks with Tunable Absorbability</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Dai, Wei; Kim, Seong Jin; Seong, Won-Kyeong; Kim, Sang Hoon; Lee, Kwang-Ryeol; Kim, Ho-Young; Moon, Myoung-Woon</p> <p>2013-01-01</p> <p><span class="hlt">Porous</span> carbon materials with high specific surface areas and superhydrophobicity have attracted much research interest due to their potential application in the areas of water filtration, water/oil separation, and oil-spill cleanup. Most reported superhydrophobic <span class="hlt">porous</span> carbon materials are fabricated by complex processes <span class="hlt">involving</span> the use of catalysts and high temperatures but with low throughput. Here, we present a facile single-step method for fabricating <span class="hlt">porous</span> carbon nanoparticle (CNP) networks with selective absorbability for water and oils via the glow discharge of hydrocarbon plasma without a catalyst at room temperature. <span class="hlt">Porous</span> CNP networks were grown by the continuous deposition of CNPs at a relatively high deposition pressure. By varying the fluorine content, the <span class="hlt">porous</span> CNP networks exhibited tunable repellence against liquids with various degrees of surface tension. These <span class="hlt">porous</span> CNP networks could be applied for the separation of not only water/oil mixtures but also mixtures of liquids with different surface tension levels. PMID:23982181</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/23982181','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/23982181"><span id="translatedtitle"><span class="hlt">Porous</span> carbon nanoparticle networks with tunable absorbability.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Dai, Wei; Kim, Seong Jin; Seong, Won-Kyeong; Kim, Sang Hoon; Lee, Kwang-Ryeol; Kim, Ho-Young; Moon, Myoung-Woon</p> <p>2013-01-01</p> <p><span class="hlt">Porous</span> carbon materials with high specific surface areas and superhydrophobicity have attracted much research interest due to their potential application in the areas of water filtration, water/oil separation, and oil-spill cleanup. Most reported superhydrophobic <span class="hlt">porous</span> carbon materials are fabricated by complex processes <span class="hlt">involving</span> the use of catalysts and high temperatures but with low throughput. Here, we present a facile single-step method for fabricating <span class="hlt">porous</span> carbon nanoparticle (CNP) networks with selective absorbability for water and oils via the glow discharge of hydrocarbon plasma without a catalyst at room temperature. <span class="hlt">Porous</span> CNP networks were grown by the continuous deposition of CNPs at a relatively high deposition pressure. By varying the fluorine content, the <span class="hlt">porous</span> CNP networks exhibited tunable repellence against liquids with various degrees of surface tension. These <span class="hlt">porous</span> CNP networks could be applied for the separation of not only water/oil mixtures but also mixtures of liquids with different surface tension levels. PMID:23982181</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_3");'>3</a></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li class="active"><span>5</span></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_5 --> <div id="page_6" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li class="active"><span>6</span></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="101"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013NatSR...3E2524D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013NatSR...3E2524D"><span id="translatedtitle"><span class="hlt">Porous</span> Carbon Nanoparticle Networks with Tunable Absorbability</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Dai, Wei; Kim, Seong Jin; Seong, Won-Kyeong; Kim, Sang Hoon; Lee, Kwang-Ryeol; Kim, Ho-Young; Moon, Myoung-Woon</p> <p>2013-08-01</p> <p><span class="hlt">Porous</span> carbon materials with high specific surface areas and superhydrophobicity have attracted much research interest due to their potential application in the areas of water filtration, water/oil separation, and oil-spill cleanup. Most reported superhydrophobic <span class="hlt">porous</span> carbon materials are fabricated by complex processes <span class="hlt">involving</span> the use of catalysts and high temperatures but with low throughput. Here, we present a facile single-step method for fabricating <span class="hlt">porous</span> carbon nanoparticle (CNP) networks with selective absorbability for water and oils via the glow discharge of hydrocarbon plasma without a catalyst at room temperature. <span class="hlt">Porous</span> CNP networks were grown by the continuous deposition of CNPs at a relatively high deposition pressure. By varying the fluorine content, the <span class="hlt">porous</span> CNP networks exhibited tunable repellence against liquids with various degrees of surface tension. These <span class="hlt">porous</span> CNP networks could be applied for the separation of not only water/oil mixtures but also mixtures of liquids with different surface tension levels.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4776699','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4776699"><span id="translatedtitle"><span class="hlt">Impact</span> on the individual: what do patients and carers gain, lose and expect from being <span class="hlt">involved</span> in research?</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Ashcroft, Joanne; Wykes, Til; Taylor, Joseph; Crowther, Adam; Szmukler, George</p> <p>2016-01-01</p> <p>Abstract Background: Study feasibility and deliverability can benefit from <span class="hlt">involving</span> patients and carers in the research process, known as patient and public <span class="hlt">involvement</span> (PPI). There is less evidence on the experiences of patients and carers themselves and we require more information across a range of studies, health conditions and research stages. Aims: This study explored how patients and carers in eight diagnostic research specialties have been <span class="hlt">involved</span> in research, their motivations and the <span class="hlt">impact</span> <span class="hlt">involvement</span> had on them. Method: 143 patients and carers across the Clinical Research Network (CRN) responded to an online semi-structured questionnaire (developed using participatory methodology). Quantitative and qualitative data were analysed. Results: A range of benefits were reported, including providing a life focus and an improved relationship with illness. Less positive experiences regarding time and money and lack of acknowledgement were also reported, along with suggestions for improvement. Conclusions: PPI confers many benefits on patients and carers which could increase PPI recruitment if made explicit. More <span class="hlt">involvement</span> in study recruitment and dissemination would increase the effectiveness of PPI input. <span class="hlt">Involving</span> a more varied socioeconomic demographic and at an earlier stage is vital. Financial support for lower earners and greater feedback following <span class="hlt">involvement</span> should also be explored. PMID:26733079</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013Nanos...5.2835Z','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013Nanos...5.2835Z"><span id="translatedtitle">Electrospinning-thermal treatment synthesis: a general strategy to decorate highly <span class="hlt">porous</span> nanotubes on both internal and external side-walls with metal oxide/noble metal nanoparticles</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Zhao, Haitao; Lu, Bingan; Xu, Jing; Xie, Erqing; Wang, Taihong; Xu, Zhi</p> <p>2013-03-01</p> <p>The hybrid structure of nanoparticle-decorated highly <span class="hlt">porous</span> nanotubes combines the advantages of large specific surface areas of nanoparticles and anisotropic properties of highly <span class="hlt">porous</span> nanotubes, which is desirable for many applications, including batteries, photoelectrochemical water splitting, and catalysis. Here, we report a novel emulsion electrospinning-thermal treatment method to synthesize the nanoparticles deposited on both side walls of nanotubes with two unique characteristics: (1) large loading amount of nanoparticles per highly <span class="hlt">porous</span> nanotubes (with the morphology of nanoparticles); (2) intimate contact between nanoparticles and highly <span class="hlt">porous</span> nanotubes. Both features are advantageous for the above applications that <span class="hlt">involve</span> both surface reactions and charge transportation processes. Moreover, the emulsion electrospinning-thermal treatment method is simple and straightforward, with which we have successfully decorated various highly <span class="hlt">porous</span> metal oxide nanotubes with metal oxide or noble metal nanoparticles. The new method will have an <span class="hlt">impact</span> on diverse technologies such as lithium ion batteries, catalysts, and photoelectrochemical devices.The hybrid structure of nanoparticle-decorated highly <span class="hlt">porous</span> nanotubes combines the advantages of large specific surface areas of nanoparticles and anisotropic properties of highly <span class="hlt">porous</span> nanotubes, which is desirable for many applications, including batteries, photoelectrochemical water splitting, and catalysis. Here, we report a novel emulsion electrospinning-thermal treatment method to synthesize the nanoparticles deposited on both side walls of nanotubes with two unique characteristics: (1) large loading amount of nanoparticles per highly <span class="hlt">porous</span> nanotubes (with the morphology of nanoparticles); (2) intimate contact between nanoparticles and highly <span class="hlt">porous</span> nanotubes. Both features are advantageous for the above applications that <span class="hlt">involve</span> both surface reactions and charge transportation processes. Moreover, the</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/1986049','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/1986049"><span id="translatedtitle">The <span class="hlt">impact</span> of elder health, caregiver <span class="hlt">involvement</span>, and global stress on two dimensions of caregiver burden.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Miller, B; McFall, S; Montgomery, A</p> <p>1991-01-01</p> <p>This study examined the simultaneous effects of an elder's health, caregiver <span class="hlt">involvement</span>, and stress on caregiver burden, addressing the questions: (a) What are the direct and indirect effects of level of elder's impairment, caregiver <span class="hlt">involvement</span>, and stress on personal and interpersonal burden? (b) How do these relationships differ between spouse and adult-child caregivers? Data were from the 1982 National Long Term Care Survey. Results using linear structural relations analysis showed the effect of a frail elder's health and functioning on personal and interpersonal burden is mediated by task <span class="hlt">involvement</span> and perceived global stress. Contrary to expectation, there were few differences in the direct effect of each dimension of health, functional limitations, cognitive status, and global health rating on each dimension of burden. Although the results suggested mean differences between spouse and adult child caregivers on key variables, there were no differences by family relationship in the system of relationships that comprise the process linking health and burden.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4919665','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4919665"><span id="translatedtitle">The <span class="hlt">impact</span> of transitions between two-fluid and three-fluidphases on fluid configuration and fluid-fluid interfacial areain <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Carroll, Kenneth C.; McDonald, Kieran; Marble, Justin; Russo, Ann E.; Brusseau, Mark L.</p> <p>2016-01-01</p> <p>Multiphase-fluid distribution and flow is inherent in numerous areas of hydrology. Yet, pore-scale characterization of transitions between two and three immiscible-fluids is limited. The objective of this study was to examine the <span class="hlt">impact</span> of such transitions on the pore-scale configuration of organic liquid in a multi-fluid system comprising natural <span class="hlt">porous</span> media. Three-dimensional images of an organic liquid (trichloroethene) in two-phase (organic-liquid/water) and three-phase (air/organic-liquid/water) systems were obtained using X-ray microtomography before and after drainage and imbibition. Upon transition from a two-phase to a three-phase system, a significant portion of the organic liquid (intermediate wetting fluid) was observed to exist as lenses and films in contact with air (nonwetting fluid). In these cases, the air was either encased by or contiguous to the organic liquid. The presence of air resulted in an increase in the surface-area-to-volume ratios for the organic-liquid blobs. Upon imbibition, the air was displaced downgradient, and concomitantly, the morphology of the organic-liquid blobs no longer in contact with air reverted to that characteristic of a two-phase distribution (i.e., more spherical blobs and ganglia). This change in morphology resulted in a reduction in the surface-area-to-volume ratio. These results illustrate the <span class="hlt">impact</span> of transitions between two-phase and three-phase conditions on fluid configuration, and they demonstrate the malleable nature of fluid configuration under dynamic, multiphase-flow conditions. The results have implications for characterizing and modeling pore-scale flow and mass-transfer processes. PMID:27350722</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015WRR....51.7189C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015WRR....51.7189C"><span id="translatedtitle">The <span class="hlt">impact</span> of transitions between two-fluid and three-fluid phases on fluid configuration and fluid-fluid interfacial area in <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Carroll, Kenneth C.; McDonald, Kieran; Marble, Justin; Russo, Ann E.; Brusseau, Mark L.</p> <p>2015-09-01</p> <p>Multiphase-fluid distribution and flow is inherent in numerous areas of hydrology. Yet pore-scale characterization of transitions between two and three immiscible fluids is limited. The objective of this study was to examine the <span class="hlt">impact</span> of such transitions on the pore-scale configuration of organic liquid in a multifluid system comprising natural <span class="hlt">porous</span> media. Three-dimensional images of an organic liquid (trichloroethene) in two-phase (organic-liquid/water) and three-phase (air/organic-liquid/water) systems were obtained using X-ray microtomography before and after drainage and imbibition. Upon transition from a two-phase to a three-phase system, a significant portion of the organic liquid (intermediate wetting fluid) was observed to exist as lenses and films in contact with air (nonwetting fluid). In these cases, the air was either encased by or contiguous to the organic liquid. The presence of air resulted in an increase in the surface-area-to-volume ratios for the organic-liquid blobs. Upon imbibition, the air was displaced downgradient, and concomitantly, the morphology of the organic-liquid blobs no longer in contact with air reverted to that characteristic of a two-phase distribution (i.e., more spherical blobs and ganglia). This change in morphology resulted in a reduction in the surface-area-to-volume ratio. These results illustrate the <span class="hlt">impact</span> of transitions between two-phase and three-phase conditions on fluid configuration, and they demonstrate the malleable nature of fluid configuration under dynamic, multiphase-flow conditions. The results have implications for characterizing and modeling pore-scale flow and mass transfer processes.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014Fract..2240007Z','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014Fract..2240007Z"><span id="translatedtitle">Pore Structure Reconstruction and Moisture Migration in <span class="hlt">Porous</span> Media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Zheng, Jiayi; Shi, Xing; Shi, Juan; Chen, Zhenqian</p> <p>2014-09-01</p> <p>Three kinds of <span class="hlt">porous</span> media (isotropic, perpendicular anisotropic and parallel anisotropic <span class="hlt">porous</span> media) with the same porosity, different pore size distributions and fractal spectral dimensions were reconstructed by random growth method. It was aimed to theoretically study the <span class="hlt">impact</span> of microscopic pore structure on water vapor diffusion process in <span class="hlt">porous</span> media. The results show that pore size distribution can only denote the static characteristics of <span class="hlt">porous</span> media but cannot effectively reflect the dynamic transport characteristics of <span class="hlt">porous</span> media. Fractal spectral dimension can effectively analyze and reflect pores connectivity and moisture dynamic transport properties of <span class="hlt">porous</span> media from the microscopic perspective. The pores connectivity and water vapor diffusion performance in pores of <span class="hlt">porous</span> media get better with the increase of fractal spectral dimension of <span class="hlt">porous</span> media. Fractal spectral dimension of parallel anisotropic <span class="hlt">porous</span> media is more than that of perpendicular anisotropic <span class="hlt">porous</span> media. Fractal spectral dimension of isotropic <span class="hlt">porous</span> media is between parallel anisotropic <span class="hlt">porous</span> media and perpendicular anisotropic <span class="hlt">porous</span> media. Other macroscopic parameters such as equilibrium diffusion coefficient of water vapor, water vapor concentration variation at right boundary in equilibrium, the time when water vapor diffusion process reaches a stable state also can characterize the pores connectivity and water vapor diffusion properties of <span class="hlt">porous</span> media.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=art+AND+prison&pg=6&id=ED076092','ERIC'); return false;" href="http://eric.ed.gov/?q=art+AND+prison&pg=6&id=ED076092"><span id="translatedtitle">Perspectives on Prison Legal Services: Needs, <span class="hlt">Impact</span>, and the Potential for Law School <span class="hlt">Involvement</span>.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Finkelstein, M. Marvin</p> <p></p> <p>This document presents the results of a systematic study of the <span class="hlt">impact</span> of student legal services on correctional institutions. Legal service projects were established in three New England prisons to assess the validity of the legal problems claimed by prison inmates and to process those found to be worthwhile. What resulted was a cataloging of the…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/FR-2010-11-15/pdf/2010-28689.pdf','FEDREG'); return false;" href="https://www.gpo.gov/fdsys/pkg/FR-2010-11-15/pdf/2010-28689.pdf"><span id="translatedtitle">75 FR 69630 - <span class="hlt">Impact</span> of Implementation of the Chemical Weapons Convention on Commercial Activities <span class="hlt">Involving</span>...</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collection.action?collectionCode=FR">Federal Register 2010, 2011, 2012, 2013, 2014</a></p> <p></p> <p>2010-11-15</p> <p>... Bureau of Industry and Security <span class="hlt">Impact</span> of Implementation of the Chemical Weapons Convention on Commercial... implementation of the Chemical Weapons Convention (CWC), through the Chemical Weapons Convention Implementation Act (CWCIA) and the Chemical Weapons Convention Regulations (CWCR), has had on commercial...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4217264','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4217264"><span id="translatedtitle">Characteristics of bony changes and tooth displacement in the mandibular cystic lesion <span class="hlt">involving</span> the <span class="hlt">impacted</span> third molar</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Lee, Jin-Hyeok; Kim, Sung-Min; Kim, Hak-Jin; Jeon, Kug-Jin; Park, Kwang-Ho</p> <p>2014-01-01</p> <p>Objectives The purpose of this retrospective study is to find the differentiating characteristics of cystic and cystic-appearing lesions that <span class="hlt">involve</span> the <span class="hlt">impacted</span> mandibular third molar by analyzing panoramic radiographs and computed tomography images, and to aid the preoperative diagnosis. Materials and Methods Eighty-one patients who had a mandibular cystic or cystic-appearing lesion that <span class="hlt">involved</span> <span class="hlt">impacted</span> mandibular third molar and underwent cyst enucleation were included in the study. The preoperative panoramic radiograph and computed tomography findings were analyzed in accordance to the histopathologic type. Results Most of the cystic lesions containing the mandibular third molar were diagnosed as a dentigerous cyst (77.8%). The occurrence of mesio-distal displacement of the third molar was more frequent in the odontogenic keratocyst (71.4%) and in the ameloblastoma (85.7%) than in the dentigerous cyst (19.1%). Downward displacement was primarily observed in each group. Odontogenic keratocyst and ameloblastoma showed more aggressive growth pattern with higher rate of bony discontinuity and cortical bone expansion than in dentigerous cyst. Conclusion When evaluating mandibular cystic lesions <span class="hlt">involving</span> the <span class="hlt">impacted</span> mandibular third molar, dentigerous cyst should first be suspected. However, when the third molar displacement and cortical bone absorption are observed, then odontogenic keratocyst or ameloblastoma should be considered. PMID:25368835</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/25431978','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/25431978"><span id="translatedtitle">Family <span class="hlt">involvement</span> in music <span class="hlt">impacts</span> participation of children with cochlear implants in music education and music activities.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Driscoll, Virginia; Gfeller, Kate; Tan, Xueli; See, Rachel L; Cheng, Hsin-Yi; Kanemitsu, Mikiko</p> <p>2015-05-01</p> <p>Objective Children with cochlear implants (CIs) participate in musical activities in school and daily lives. Considerable variability exists regarding the amount of music <span class="hlt">involvement</span> and enjoyment. Using the Music Engagement Questionnaire-Preschool/Elementary (MEQ-P/E), we wanted to determine patterns of musical participation and the <span class="hlt">impact</span> of familial factors on engagement. Methods Parents of 32 children with CIs (16 preschool and 16 elementary) completed a questionnaire regarding the musical <span class="hlt">involvement</span> of their child with an implant and a normal-hearing (NH) sibling (if one existed). We compared CI children's <span class="hlt">involvement</span> to that of their NH siblings as well as across groups of children with and without CIs. Correlations between parent ratings of music importance, demographic factors, and <span class="hlt">involvement</span> of CI and NH children were conducted within and across groups. Results No significant differences were found between children with CIs and NH siblings, meaning children from the same family showed similar levels of musical <span class="hlt">involvement</span>. When compared at the same developmental stage, no significant differences were found between preschool children with and without CIs. Parents who rated the importance of music as 'low' or 'middle' had children (NH and CI) who were less <span class="hlt">involved</span> in music activities. Children whose parents rated music importance as 'high' were <span class="hlt">involved</span> in monthly to weekly music activities with 81.25% reporting daily music listening. Conclusion Despite a less-than-ideal auditory signal for music, preschool and school-aged CI children enjoy and are <span class="hlt">involved</span> in musical experiences. Families who enjoy and spend a greater amount of time <span class="hlt">involved</span> in music tend to have children who also engage more actively in music. PMID:25431978</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25431978','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25431978"><span id="translatedtitle">Family <span class="hlt">involvement</span> in music <span class="hlt">impacts</span> participation of children with cochlear implants in music education and music activities.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Driscoll, Virginia; Gfeller, Kate; Tan, Xueli; See, Rachel L; Cheng, Hsin-Yi; Kanemitsu, Mikiko</p> <p>2015-05-01</p> <p>Objective Children with cochlear implants (CIs) participate in musical activities in school and daily lives. Considerable variability exists regarding the amount of music <span class="hlt">involvement</span> and enjoyment. Using the Music Engagement Questionnaire-Preschool/Elementary (MEQ-P/E), we wanted to determine patterns of musical participation and the <span class="hlt">impact</span> of familial factors on engagement. Methods Parents of 32 children with CIs (16 preschool and 16 elementary) completed a questionnaire regarding the musical <span class="hlt">involvement</span> of their child with an implant and a normal-hearing (NH) sibling (if one existed). We compared CI children's <span class="hlt">involvement</span> to that of their NH siblings as well as across groups of children with and without CIs. Correlations between parent ratings of music importance, demographic factors, and <span class="hlt">involvement</span> of CI and NH children were conducted within and across groups. Results No significant differences were found between children with CIs and NH siblings, meaning children from the same family showed similar levels of musical <span class="hlt">involvement</span>. When compared at the same developmental stage, no significant differences were found between preschool children with and without CIs. Parents who rated the importance of music as 'low' or 'middle' had children (NH and CI) who were less <span class="hlt">involved</span> in music activities. Children whose parents rated music importance as 'high' were <span class="hlt">involved</span> in monthly to weekly music activities with 81.25% reporting daily music listening. Conclusion Despite a less-than-ideal auditory signal for music, preschool and school-aged CI children enjoy and are <span class="hlt">involved</span> in musical experiences. Families who enjoy and spend a greater amount of time <span class="hlt">involved</span> in music tend to have children who also engage more actively in music.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4420640','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4420640"><span id="translatedtitle">Family <span class="hlt">involvement</span> in music <span class="hlt">impacts</span> participation of children with cochlear implants in music education and music activities</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Driscoll, Virginia; Gfeller, Kate; Tan, Xueli; See, Rachel L.; Cheng, Hsin-Yi; Kanemitsu, Mikiko</p> <p>2014-01-01</p> <p>Objective Children with cochlear implants (CIs) participate in musical activities in school and daily lives. Considerable variability exists regarding the amount of music <span class="hlt">involvement</span> and enjoyment. Using the Music Engagement Questionnaire-Preschool/Elementary (MEQ-P/E), we wanted to determine patterns of musical participation and the <span class="hlt">impact</span> of familial factors on engagement. Methods Parents of 32 children with CIs (16 preschool, 16 elementary) completed a questionnaire regarding the musical <span class="hlt">involvement</span> of their child with an implant and a normal-hearing (NH) sibling (if one existed). We compared CI children's <span class="hlt">involvement</span> to that of their NH siblings as well as across groups of children with and without CIs. Correlations between parent ratings of music importance, demographic factors, and <span class="hlt">involvement</span> of CI and NH children were conducted within and across groups. Results No significant differences were found between children with CIs and NH siblings, meaning children from the same family showed similar levels of musical <span class="hlt">involvement</span>. When compared at the same developmental stage, no significant differences were found between preschool children with and without CIs. Parents who rated the importance of music as “low” or “middle” had children (NH and CI) who were less <span class="hlt">involved</span> in music activities. Children whose parents rated music importance as “high” were <span class="hlt">involved</span> in monthly to weekly music activities with 81.25% reporting daily music listening. Conclusion Despite a less-than-ideal auditory signal for music, preschool and school-aged CI children enjoy and are <span class="hlt">involved</span> in musical experiences. Families who enjoy and spend a greater amount of time <span class="hlt">involved</span> in music tend to have children who also engage more actively in music. PMID:25431978</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/895764','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/895764"><span id="translatedtitle">Resolving the <span class="hlt">Impact</span> of Biological Processes on Water Transport in Unsaturated <span class="hlt">Porous</span> Media Through Nuclear Magnetic Resonance Micro-Imaging</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Seymour, Joseph D.</p> <p>2005-06-01</p> <p>The magnetic resonance microscopy (MRM) work at Montana State University has extended the imaging of a single biofilm in a 1 mm capillary reactor to correlate T2 magnetic relaxation maps displaying biofilm structure with the corresponding velocity patterns in three dimensions in a Staphylococcus epidermidis biofilm fouled square capillary. A square duct geometry is chosen to provide correlation with existing experiments and simulations, as research bioreactors tend to be of square or rectangular cross section for optical or microelectrode access. The spatially resolved velocity data provide details on the <span class="hlt">impact</span> of biofilm induced advection on mass transport from the bulk fluid to the biofilm and through the capillary bioreactor.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011AGUFM.H53N..02P','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011AGUFM.H53N..02P"><span id="translatedtitle">The 2D versus 3D imaging trade-off: The <span class="hlt">impact</span> of over- or under-estimating small throats for simulating permeability in <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Peters, C. A.; Crandell, L. E.; Um, W.; Jones, K. W.; Lindquist, W. B.</p> <p>2011-12-01</p> <p>Geochemical reactions in the subsurface can alter the porosity and permeability of a <span class="hlt">porous</span> medium through mineral precipitation and dissolution. While effects on porosity are relatively well understood, changes in permeability are more difficult to estimate. In this work, pore-network modeling is used to estimate the permeability of a <span class="hlt">porous</span> medium using pore and throat size distributions. These distributions can be determined from 2D Scanning Electron Microscopy (SEM) images of thin sections or from 3D X-ray Computed Tomography (CT) images of small cores. Each method has unique advantages as well as unique sources of error. 3D CT imaging has the advantage of reconstructing a 3D pore network without the inherent geometry-based biases of 2D images but is limited by resolutions around 1 μm. 2D SEM imaging has the advantage of higher resolution, and the ability to examine sub-grain scale variations in porosity and mineralogy, but is limited by the small size of the sample of pores that are quantified. A pore network model was created to estimate flow permeability in a sand-packed experimental column investigating reaction of sediments with caustic radioactive tank wastes in the context of the Hanford, WA site. Before, periodically during, and after reaction, 3D images of the <span class="hlt">porous</span> medium in the column were produced using the X2B beam line facility at the National Synchrotron Light Source (NSLS) at Brookhaven National Lab. These images were interpreted using 3DMA-Rock to characterize the pore and throat size distributions. After completion of the experiment, the column was sectioned and imaged using 2D SEM in backscattered electron mode. The 2D images were interpreted using erosion-dilation to estimate the pore and throat size distributions. A bias correction was determined by comparison with the 3D image data. A special image processing method was developed to infer the pore space before reaction by digitally removing the precipitate. The different sets of pore</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Socialization&pg=5&id=EJ1061287','ERIC'); return false;" href="http://eric.ed.gov/?q=Socialization&pg=5&id=EJ1061287"><span id="translatedtitle">The <span class="hlt">Impact</span> of Racial Socialization on the Academic Performance and Prosocial <span class="hlt">Involvement</span> of Black Emerging Adults</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>White-Johnson, Rhonda L.</p> <p>2015-01-01</p> <p>Despite evidence linking racial socialization processes to the functioning of Black youth, the effect of these parenting practices among Black college students is less clear. This study examined the relationship among racial socialization messages, academic performance, and prosocial <span class="hlt">involvement</span> for 295 Black college students. Results revealed…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=corporate+AND+culture&id=EJ948410','ERIC'); return false;" href="http://eric.ed.gov/?q=corporate+AND+culture&id=EJ948410"><span id="translatedtitle">The <span class="hlt">Impact</span> of Japanese Corporate Transnationalism on Men's <span class="hlt">Involvement</span> in Family Life and Relationships</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Yasuike, Akiko</p> <p>2011-01-01</p> <p>This study examines the ways in which Japanese corporate transnationalism affects husbands' <span class="hlt">involvement</span> in family life and marital relationships primarily from a perspective of wives. It is based on interviews with 22 Japanese wives and 4 husbands. Studies of Japanese corporate transnationalism treat men as mere supervisors to local workers or…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=maternal+AND+paternal+AND+parenting&pg=3&id=EJ835041','ERIC'); return false;" href="http://eric.ed.gov/?q=maternal+AND+paternal+AND+parenting&pg=3&id=EJ835041"><span id="translatedtitle">The Differential <span class="hlt">Impact</span> of Early Father and Mother <span class="hlt">Involvement</span> on Later Student Achievement</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>McBride, Brent A.; Dyer, W. Justin; Liu, Ying; Brown, Geoffrey L.; Hong, Sungjin</p> <p>2009-01-01</p> <p>The purpose of this exploratory study was to examine the direct and indirect effects of early parenting on later parental school <span class="hlt">involvement</span> and student achievement. The sample, pulled from the 1st and 2nd waves of the Child Development Supplement data set of the Panel Study of Income Dynamics, consisted of 390 children age 2-5 at Time 1 and their…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED365917.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED365917.pdf"><span id="translatedtitle">Adolescent Abortion and Mandated Parental <span class="hlt">Involvement</span>: The <span class="hlt">Impact</span> of Back Alley Laws on Young Women.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Flinn, Susan; And Others</p> <p></p> <p>This document notes that many states have passed, or are considering, laws that would mandate parental consent for, or notification of, a young woman's decision to obtain an abortion. Constructed in a question-and-answer format, the document then examines a number of issues concerned with such mandated parental <span class="hlt">involvement</span>. It examines who is…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Theater&pg=5&id=EJ754300','ERIC'); return false;" href="http://eric.ed.gov/?q=Theater&pg=5&id=EJ754300"><span id="translatedtitle">Do a Little Dance: The <span class="hlt">Impact</span> on Students when Librarians Get <span class="hlt">Involved</span> in Extracurricular Activities</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Kasperek, Sheila; Johnson, Amber; Fotta, Katie; Craig, Francis</p> <p>2007-01-01</p> <p>One hundred fifty-two undergraduate students at Mansfield University of Pennsylvania were surveyed to determine if the <span class="hlt">involvement</span> of their liaison librarian in theater productions and orchestra had an effect on their relationship with the library. The study shows positive and statistically significant results for students who participated in…</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li class="active"><span>6</span></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_6 --> <div id="page_7" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li class="active"><span>7</span></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="121"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=child+AND+star&pg=3&id=ED562888','ERIC'); return false;" href="http://eric.ed.gov/?q=child+AND+star&pg=3&id=ED562888"><span id="translatedtitle">Parent <span class="hlt">Involvement</span> and the <span class="hlt">Impact</span> on Student Achievement in Grades 2-5</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Thurber, Yvonne Marie</p> <p>2013-01-01</p> <p>This quantitative research study examined the relationship between student achievement in reading and mathematics on the STAR (Standardized Test for the Assessment of Reading and Mathematics) and parent <span class="hlt">involvement</span> in specific character development activities. The research design was quantitative in nature and conducted in two similar elementary…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/17717544','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/17717544"><span id="translatedtitle">High-<span class="hlt">impact</span> medical journals and peace: a history of <span class="hlt">involvement</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Bloom, Joshua D; Sambunjak, Dario; Sondorp, Egbert</p> <p>2007-01-01</p> <p>The aim of this study is to explore the positions of five leading general medical journals (The Lancet, British Medical Journal--BMJ, Journal of American Medical Association--JAMA, New England Journal of Medicine--NEJM, and Annals of Internal Medicine--AIM) toward the issues of collective violence. We calculated the proportion of war-related articles in the total number of articles published in these five high-<span class="hlt">impact</span> journals, and in the total number of articles indexed in PubMed during the last 60 years. The results showed a continuous increase in the proportion of war-related articles. Our findings suggest that the leading general medical journals have taken an active editorial stance toward the issues of war and peace. We conclude that high-<span class="hlt">impact</span> medical journals can make an important contribution to efforts aimed at reducing the risks and consequences of war and violence.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/20969922','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/20969922"><span id="translatedtitle">Approaches to mitigate the <span class="hlt">impact</span> of dissolved organic matter on the adsorption of synthetic organic contaminants by <span class="hlt">porous</span> carbonaceous sorbents</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Yanping Guo; Abhishek Yadav; Tanju Karanfil</p> <p>2007-11-15</p> <p>Adsorption of trichloroethylene (TCE) and atrazine, two synthetic organic contaminants (SOCs) having different optimum adsorption pore regions, by four activated carbons and an activated carbon fiber (ACF) was examined. Adsorbents included two coconut-shell based granular activated carbons (GACs), two coal-based GACs (F400 and HD4000) and a phenol formaldehyde-based activated carbon fiber. The selected adsorbents had a wide range of pore size distributions but similar surface acidity and hydrophobicity. Single solute and preloading (with a dissolved organic matter (DOM)) isotherms were performed. Single solute adsorption results showed that (i) the adsorbents having higher amounts of pores with sizes about the dimensions of the adsorbate molecules exhibited higher uptakes, (ii) there were some pore structure characteristics, which were not completely captured by pore size distribution analysis, that also affected the adsorption, and (iii) the BET surface area and total pore volume were not the primary factors controlling the adsorption of SOCs. The preloading isotherm results showed that for TCE adsorbing primarily in pores <10 {angstrom}, the highly microporous ACF and GACs, acting like molecular sieves, exhibited the highest uptakes. For atrazine with an optimum adsorption pore region of 10-20 {angstrom}, which overlaps with the adsorption region of some DOM components, the GACs with a broad pore size distribution and high pore volumes in the 10-20 {angstrom} region had the least <span class="hlt">impact</span> of DOM on the adsorption. 25 refs., 3 figs., 3 tabs.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22852528','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22852528"><span id="translatedtitle">Considering the air quality <span class="hlt">impacts</span> of bioenergy crop production: a case study <span class="hlt">involving</span> Arundo donax.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Porter, William C; Barsanti, Kelley C; Baughman, Eowyn C; Rosenstiel, Todd N</p> <p>2012-09-01</p> <p>The expanding production of bioenergy crops may <span class="hlt">impact</span> regional air quality through the production of volatile organic compounds such as isoprene. To investigate the effects of isoprene-emitting crops on air quality, specifically ozone (O(3)) and secondary organic aerosol (SOA) formation, we performed a series of model runs using the Weather Research and Forecasting model with Chemistry (WRF/Chem) coupled with the Model of Emissions of Gases and Aerosols from Nature (MEGAN) simulating a proposed cropland conversion to the giant cane Arundo donax for biomass production. Cultivation of A. donax in the relatively clean air of northeastern Oregon resulted in an average increase in 8 h O(3) levels of 0.52 ppb, while SOA was largely unaffected (<+0.01 μg m(-3)). Conversions in U.S. regions with reduced air quality (eastern Texas and northern Illinois) resulted in average 8 h O(3) increases of 2.46 and 3.97 ppb, respectively, with daily increases up to 15 ppb in the Illinois case, and daytime SOA increases up to 0.57 μg m(-3). While cultivation of isoprene-emitting bioenergy crops may be appropriate at some scales and in some regions, other areas may experience increased O(3) and SOA, highlighting the need to consider isoprene emissions when evaluating potential regional <span class="hlt">impacts</span> of bioenergy crop production.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25252283','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25252283"><span id="translatedtitle">Inertial sensing-based pre-<span class="hlt">impact</span> detection of falls <span class="hlt">involving</span> near-fall scenarios.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lee, Jung Keun; Robinovitch, Stephen N; Park, Edward J</p> <p>2015-03-01</p> <p>Although near-falls (or recoverable imbalances) are common episodes for many older adults, they have received a little attention and were not considered in the previous laboratory-based fall assessments. Hence, this paper addresses near-fall scenarios in addition to the typical falls and activities of daily living (ADLs). First, a novel vertical velocity-based pre-<span class="hlt">impact</span> fall detection method using a wearable inertial sensor is proposed. Second, to investigate the effect of near-fall conditions on the detection performance and feasibility of the vertical velocity as a fall detection parameter, the detection performance of the proposed method (Method 1) is evaluated by comparing it to that of an acceleration-based method (Method 2) for the following two different discrimination cases: falls versus ADLs (i.e., excluding near-falls) and falls versus non-falls (i.e., including near-falls). Our experiment results show that both methods produce similar accuracies for the fall versus ADL detection case; however, Method 1 exhibits a much higher accuracy than Method 2 for the fall versus non-fall detection case. This result demonstrates the superiority of the vertical velocity over the peak acceleration as a fall detection parameter when the near-fall conditions are included in the non-fall category, in addition to its capability of detecting pre-<span class="hlt">impact</span> falls.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009AGUFM.H13C0981Y','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009AGUFM.H13C0981Y"><span id="translatedtitle">Numerical and experimental investigation of the <span class="hlt">impact</span> of organic chemical mixtures on DNAPL migration and distribution in unsaturated <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Yoon, H.; Oostrom, M.; Wietsma, T. W.; Valocchi, A. J.; Werth, C. J.</p> <p>2009-12-01</p> <p>Two intermediate-scale flow cell experiments were conducted in order to account for the <span class="hlt">impact</span> of organic chemical mixtures and wastewater properties on dense non-aqueous phase liquid (DNAPL) migration and distribution in a layered vadose zone. The flow cell was packed with two sandy soils including an embedded fine sand lens. For the two experiments, pure carbon tetrachloride (CT) and an organic mixture containing CT and three different surface-active chemicals were injected at the top of the flow cell, respectively. Numerous photos and video images were taken, and a dual-energy gamma radiation system was used to measure initial and final NAPL saturation profiles in the flow cell. For both cases, the NAPL front reached the top interface of coarse- and fine-grained sands very quickly. After the NAPL front reached the bottom of the fine lens, the pure CT quickly penetrated through the bottom of fine lens, resulting in multiple fingers at the interface of fine and coarse sands, while the mixture moved horizontally at the bottom of the fine lens without penetrating, resulting in higher NAPL saturations in the fine lens. Continuum-based multiphase flow simulation results predicted that the pure CT would penetrate through the bottom of the fine lens, while the mixture would not. Simulation results indicate that higher density, lower viscosity, and higher surface tension values for pure CT relative to the mixture can increase the total NAPL pressure of pure CT at the interface of the fine lens when the CT front reaches the bottom of the fine lens, resulting in overcoming the capillary barrier effect at the interface. However, simulations significantly under-predicted the amount of CT penetrating through the fine lens. The effect of water saturation and chemical properties on finger formation will be discussed. The effect of organic and aqueous phase properties on NAPL distribution at the field scale will be also explored through a case study.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/18619707','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/18619707"><span id="translatedtitle"><span class="hlt">Impact</span> of nonaqueous phase liquid (NAPL) source zone architecture on mass removal mechanisms in strongly layered heterogeneous <span class="hlt">porous</span> media during soil vapor extraction.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Yoon, Hongkyu; Werth, Charles J; Valocchi, Albert J; Oostrom, Mart</p> <p>2008-08-20</p> <p>An existing multiphase flow simulator was modified in order to determine the effects of four mechanisms on NAPL mass removal in a strongly layered heterogeneous vadose zone during soil vapor extraction (SVE): a) NAPL flow, b) diffusion and dispersion from low permeability zones, c) slow desorption from sediment grains, and d) rate-limited dissolution of trapped NAPL. The <span class="hlt">impacts</span> of water and NAPL saturation distribution, NAPL-type (i.e., free, residual, or trapped) distribution, and spatial heterogeneity of the permeability field on these mechanisms were evaluated. Two different initial source zone architectures (one with and one without trapped NAPL) were considered and these architectures were used to evaluate seven different SVE scenarios. For all runs, slow diffusion from low permeability zones that gas flow bypassed was a dominant factor for diminished SVE effectiveness at later times. This effect was more significant at high water saturation due to the decrease of gas-phase relative permeability. Transverse dispersion contributed to fast NAPL mass removal from the low permeability layer in both source zone architectures, but longitudinal dispersion did not affect overall mass removal time. Both slow desorption from sediment grains and rate-limited mass transfer from trapped NAPL only marginally affected removal times. However, mass transfer from trapped NAPL did affect mass removal at later time, as well as the NAPL distribution. NAPL flow from low to high permeability zones contributed to faster mass removal from the low permeability layer, and this effect increased when water infiltration was eliminated. These simulations indicate that if trapped NAPL exists in heterogeneous <span class="hlt">porous</span> media, mass transfer can be improved by delivering gas directly to zones with trapped NAPL and by lowering the water content, which increases the gas relative permeability and changes trapped NAPL to free NAPL.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/946665','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/946665"><span id="translatedtitle"><span class="hlt">Impact</span> of nonaqueous phase liquid (NAPL) source zone architecture on mass removal mechanisms in strongly layered heterogeneous <span class="hlt">porous</span> media during soil vapor extraction</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Yoon, Hongkyu; Werth, Charlie; Valocchi, Albert J.; Oostrom, Martinus</p> <p>2008-09-26</p> <p>An existing multiphase flow simulator was modified in order to determine the effects of four mechanisms on NAPL mass removal in a strongly layered heterogeneous vadose zone during soil vapor extraction (SVE): a) NAPL flow, b) diffusion and dispersion from low permeability zones, c) slow desorption from sediment grains, and d) rate-limited dissolution of trapped NAPL. The <span class="hlt">impact</span> of water and NAPL saturation distribution, NAPL type (i.e., free, residual, or trapped) distribution, and spatial heterogeneity of the permeability field on these mechanisms were evaluated. Two different initial source zone architectures (one with and one without trapped NAPL) were considered and these architectures were used to evaluate seven different SVE scenarios. For all runs, slow diffusion from low permeability zones that gas flow bypassed was a dominant factor for diminished SVE effectiveness at later times. This effect was more significant at high water saturation due to the decrease of gas-phase relative permeability. Transverse dispersion contributed to fast NAPL mass removal from the low permeability layer in both source zone architectures, but longitudinal dispersion did not affect overall mass removal time. Both slow desorption from sediment grains and rate-limited mass transfer from trapped NAPL only marginally affected removal times. However, mass transfer from trapped NAPL did affect mass removal at late time, as well as the NAPL distribution. NAPL flow from low to high permeability zones contributed to faster mass removal from the low permeability layer, and this effect increased when water infiltration was eliminated. These simulations indicate that if trapped NAPL exists in heterogeneous <span class="hlt">porous</span> media, mass transfer can be improved by delivering gas directly to zones with trapped NAPL and by lowering the water content, which increases the gas relative permeability and changes trapped NAPL to free NAPL.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/10902377','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/10902377"><span id="translatedtitle"><span class="hlt">Impact</span> of marketing work-place diversity on employee job <span class="hlt">involvement</span> and organizational commitment.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Kirby, S L; Richard, O C</p> <p>2000-06-01</p> <p>Much of the debate about managing work-force diversity concerns the rationale for the procedures used and the outcomes produced by programs perceived to be unfair. The authors explored the role of organizational justice in diversity initiatives; they examined which of 6 diversity arguments (T. H. Cox & S. Blake, 1991) were most often used by U.S. firms and accepted by employees. They also surveyed U.S. workers about diversity issues at work; the problem-solving diversity argument was related to higher employee job <span class="hlt">involvement</span> and organizational commitment, even though the respondents ranked the resource-acquisition argument as the most acceptable. The authors also found that many organizational-justice issues still need to be resolved, even in those organizations with diversity-management programs. PMID:10902377</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/10902377','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/10902377"><span id="translatedtitle"><span class="hlt">Impact</span> of marketing work-place diversity on employee job <span class="hlt">involvement</span> and organizational commitment.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Kirby, S L; Richard, O C</p> <p>2000-06-01</p> <p>Much of the debate about managing work-force diversity concerns the rationale for the procedures used and the outcomes produced by programs perceived to be unfair. The authors explored the role of organizational justice in diversity initiatives; they examined which of 6 diversity arguments (T. H. Cox & S. Blake, 1991) were most often used by U.S. firms and accepted by employees. They also surveyed U.S. workers about diversity issues at work; the problem-solving diversity argument was related to higher employee job <span class="hlt">involvement</span> and organizational commitment, even though the respondents ranked the resource-acquisition argument as the most acceptable. The authors also found that many organizational-justice issues still need to be resolved, even in those organizations with diversity-management programs.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19980201262','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19980201262"><span id="translatedtitle">Department of Physics' <span class="hlt">Involvement</span> of the <span class="hlt">Impact</span> Testing Project of the High Speed Civil Transport Program (HSCT)</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>VonMeerwall, Ernst D.</p> <p>1994-01-01</p> <p>The project <span class="hlt">involved</span> the <span class="hlt">impact</span> testing of a kevlar-like woven polymer material, PBO. The purpose was to determine whether this material showed any promise as a lightweight replacement material for jet engine fan containment. The currently used metal fan containment designs carry a high drag penalty due to their weight. Projectiles were fired at samples of PBO by means of a 0.5 inch diameter Helium powered gun. The Initial plan was to encase the samples inside a purpose-built steel "hot box" for heating and ricochet containment. The research associate's responsibility was to develop the data acquisition programs and techniques necessary to determine accurately the <span class="hlt">impacting</span> projectile's velocity. Beyond this, the Research Associate's duties include any physical computations, experimental design, and data analysis necessary.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1989SPIE..986..200M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1989SPIE..986..200M"><span id="translatedtitle">Development of <span class="hlt">porous</span> glass fiber optic sensors</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Macedo, P. B.; Barkatt, A.; Feng, X.; Finger, S. M.; Hojaji, H.</p> <p>1989-06-01</p> <p><span class="hlt">Porous</span> glass fiber optic sensors in which the <span class="hlt">porous</span> sensor tip is an integral part of the fiber optic, have been developed and found to be rugged and reliable, due to their monolithic structure and large interior surface area for attachment of active species. The sensor portion of the fiber is made <span class="hlt">porous</span> by selective leaching of a specially formulated borosilicate glass fiber, resulting in a strong, monolithic structure where the sensor portion of the fiber remains integrally attached to the rest of the fiber, essentially eliminating losses at the sensor-light pipe interface. The process for constructing <span class="hlt">porous</span> glass fiber optic sensors <span class="hlt">involves</span> fiber pulling, phase separation, selective leaching, attachment of the active reagent, and integration with other optical elements. A broad range of sensors based on this technology could be developed by using different active species, such as enzymes and other biochemicals, which could be bonded to the interior surface of the <span class="hlt">porous</span> glass sensor.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26457370','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26457370"><span id="translatedtitle">The <span class="hlt">impact</span> of emotional <span class="hlt">involvement</span> on online service buying decisions: an event-related potentials perspective.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Zhao, Meina; Wang, Jing; Han, Weiwei</p> <p>2015-12-01</p> <p>When examining a buying process, changes in human brain signals and their event-related potential (ERP) components can be considered a reflection of the consumers' emotions. In this experiment, participants were shown 12 products and related services that were available for purchase. After recording ERP components, we used a questionnaire to measure the individuals' emotional <span class="hlt">involvement</span> toward the services (i.e. the same services shown in the stimuli) of the 12 products to measure the emotional valence of the services. The emotional ERP components and the late positive potential (LPP) were elicited under the service conditions and distributed over the left frontal regions. We determined that the services may evoke an LPP and that services with a high emotional value may evoke a larger LPP, which suggests that positive emotion may be measured using the LPP amplitude in the left frontal regions. This result helps elucidate whether positive emotions are stimulated during the product-service system decision-making process and helps understand the emotional valences of different services. Our analysis of the emotional motivation of the consumer suggests that the LPP may be useful as an emotional indicator for measuring consumers' evaluation of services that provides a neural view of product-service system buying decisions. PMID:26457370</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26457370','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26457370"><span id="translatedtitle">The <span class="hlt">impact</span> of emotional <span class="hlt">involvement</span> on online service buying decisions: an event-related potentials perspective.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Zhao, Meina; Wang, Jing; Han, Weiwei</p> <p>2015-12-01</p> <p>When examining a buying process, changes in human brain signals and their event-related potential (ERP) components can be considered a reflection of the consumers' emotions. In this experiment, participants were shown 12 products and related services that were available for purchase. After recording ERP components, we used a questionnaire to measure the individuals' emotional <span class="hlt">involvement</span> toward the services (i.e. the same services shown in the stimuli) of the 12 products to measure the emotional valence of the services. The emotional ERP components and the late positive potential (LPP) were elicited under the service conditions and distributed over the left frontal regions. We determined that the services may evoke an LPP and that services with a high emotional value may evoke a larger LPP, which suggests that positive emotion may be measured using the LPP amplitude in the left frontal regions. This result helps elucidate whether positive emotions are stimulated during the product-service system decision-making process and helps understand the emotional valences of different services. Our analysis of the emotional motivation of the consumer suggests that the LPP may be useful as an emotional indicator for measuring consumers' evaluation of services that provides a neural view of product-service system buying decisions.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26213084','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26213084"><span id="translatedtitle"><span class="hlt">Impact</span> of different techniques <span class="hlt">involving</span> contact with lees on the volatile composition of cider.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Antón-Díaz, María José; Suárez Valles, Belén; Mangas-Alonso, Juan José; Fernández-García, Ovidio; Picinelli-Lobo, Anna</p> <p>2016-01-01</p> <p>The effect of different treatments <span class="hlt">involving</span> contact with natural lees on the aromatic profile of cider has been evaluated. Comparing with the untreated ciders, the contact with lees brought about a significant increase of the concentrations of most of the volatile compounds analysed, in particular fatty acids, alcohols, ethyl esters and 3-ethoxy-1-propanol. The opposite was observed among fusel acetate esters and 4-vinylguaiacol. The addition of β-glucanase enhanced the increase of ethyl octanoate, but produced a decrease in the contents of decanoic acid and all of the major volatiles excepting acetaldehyde, ethyl acetate and acetoine, whereas the application of oxygen influenced the rise of the level of 3-ethoxy-1-propanol only. The olfactometric profiles also revealed significant effects of the treatment with lees for ethyl propionate, diacetyl, cis-3-hexenol, acetic acid, benzyl alcohol, and m-cresol, while the addition of oxygen significantly influenced the perception of ethyl hexanoate, 1-octen-3-one, 3-methyl-2-butenol, t-3-hexenol and c-3-hexenol. PMID:26213084</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4623853','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4623853"><span id="translatedtitle">The <span class="hlt">impact</span> of emotional <span class="hlt">involvement</span> on online service buying decisions: an event-related potentials perspective</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Wang, Jing; Han, Weiwei</p> <p>2015-01-01</p> <p>When examining a buying process, changes in human brain signals and their event-related potential (ERP) components can be considered a reflection of the consumers’ emotions. In this experiment, participants were shown 12 products and related services that were available for purchase. After recording ERP components, we used a questionnaire to measure the individuals’ emotional <span class="hlt">involvement</span> toward the services (i.e. the same services shown in the stimuli) of the 12 products to measure the emotional valence of the services. The emotional ERP components and the late positive potential (LPP) were elicited under the service conditions and distributed over the left frontal regions. We determined that the services may evoke an LPP and that services with a high emotional value may evoke a larger LPP, which suggests that positive emotion may be measured using the LPP amplitude in the left frontal regions. This result helps elucidate whether positive emotions are stimulated during the product-service system decision-making process and helps understand the emotional valences of different services. Our analysis of the emotional motivation of the consumer suggests that the LPP may be useful as an emotional indicator for measuring consumers’ evaluation of services that provides a neural view of product-service system buying decisions. PMID:26457370</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014PhDT.......213M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014PhDT.......213M"><span id="translatedtitle">Synthesis of silica based <span class="hlt">porous</span> nanomaterials</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Mueller, Paul S.</p> <p></p> <p>Silica is one of the most abundant elements on the planet, has flexible bonding properties and generally excellent stability. Because of these properties, silica has been a vital component in technologies ranging from ancient glassware to modern supercomputers. Silica is able to form a wide range of materials both alone and as a component of larger material frameworks. <span class="hlt">Porous</span> silica based nanomaterials are rapidly growing in importance because of their many applications in a wide variety of fields. This thesis focuses on the synthesis of silica based <span class="hlt">porous</span> nanomaterials: nanocrystalline zeolites, mesoporous silica nanoparticles, and iron oxide core/shell nanocomposites. The synthetic conditions of these materials were varied in order to maximize efficiency, minimize environmental <span class="hlt">impact</span>, and produce high quality material with far reaching potential applications. The materials were characterized by physicochemical techniques including Transmission Electron Microscopy, Dynamic Light Scattering, Powder X-Ray Diffraction, Solid State NMR, and Nitrogen Adsorption Isotherms. The materials were evaluated and conditions were controlled to produce high yields of quality nanomaterials and hypothesize methods for further synthetic control. The products will be used in studies <span class="hlt">involving</span> nanoparticle toxicity, environmental remediation, and drug delivery.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/24906461','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/24906461"><span id="translatedtitle">The <span class="hlt">impact</span> of self-concept and college <span class="hlt">involvement</span> on the first-year success of medical students in China.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Zhou, Ying-Xue; Ou, Chun-Quan; Zhao, Zhi-Tao; Wan, Cheng-Song; Guo, Cui; Li, Li; Chen, Ping-Yan</p> <p>2015-03-01</p> <p>Students' first-year academic success plays a critical role on their overall development in college, which implies the need to concentrate on identifying ways to improve students' first-year academic success. Different from most research on the subject, this study attempted to combine the sociological perspective of college <span class="hlt">impact</span> with a psychological perspective to synthetically explore the causal relationship of specific types of self-concept and college <span class="hlt">involvement</span> with academic success of medical students. A longitudinal study was conducted using 519 matriculates at a medical university in mainland China. We conducted the Cooperative Institutional Research Program freshmen survey and the Your First College Year survey to collect data of the pre-college and college academic and social self-concept, college <span class="hlt">involvement</span> components, and some input characteristics. The academic success was measured by the first-year grade point average. A pathway analysis was conducted and showed the following results. Having high academic self-concept, being engaged in class and putting effort in homework or study directly contributes to increasing college achievement. Students' pre-college achievement and self-concept, faculty interaction, and homework <span class="hlt">involvement</span> positively affected students' college academic self-concept development, which indirectly improved average grade point. These findings contribute to our understanding of a student's ability to interact with his or her collegiate environment and to experience academic success. PMID:24906461</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3639501','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3639501"><span id="translatedtitle"><span class="hlt">Porous</span> Shape Memory Polymers</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Hearon, Keith; Singhal, Pooja; Horn, John; Small, Ward; Olsovsky, Cory; Maitland, Kristen C.; Wilson, Thomas S.; Maitland, Duncan J.</p> <p>2013-01-01</p> <p><span class="hlt">Porous</span> shape memory polymers (SMPs) include foams, scaffolds, meshes, and other polymeric substrates that possess <span class="hlt">porous</span> three-dimensional macrostructures. <span class="hlt">Porous</span> SMPs exhibit active structural and volumetric transformations and have driven investigations in fields ranging from biomedical engineering to aerospace engineering to the clothing industry. The present review article examines recent developments in <span class="hlt">porous</span> SMPs, with focus given to structural and chemical classification, methods of characterization, and applications. We conclude that the current body of literature presents <span class="hlt">porous</span> SMPs as highly interesting smart materials with potential for industrial use. PMID:23646038</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4261929','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4261929"><span id="translatedtitle">The <span class="hlt">impact</span> of parent <span class="hlt">involvement</span> in an effective adolescent risk reduction intervention on sexual risk communication and adolescent outcomes</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Wang, Bo; Stanton, Bonita; Deveaux, Lynette; Li, Xiaoming; Koci, Veronica; Lunn, Sonja</p> <p>2014-01-01</p> <p>Parent <span class="hlt">involvement</span> in prevention efforts targeting adolescents increases the <span class="hlt">impact</span> of such programs. However, the majority of risk-reduction intervention programs that are implemented through schools do not include parents, in part because most existing parental interventions require significant time commitment by parents. We designed a brief parent-adolescent sexual risk communication intervention to be delivered with an effective HIV prevention intervention as part of a randomized, controlled trial among 2564 grade 10 students and their parents in The Bahamas. Mixed effects modeling analysis was conducted to evaluate the effect of the brief parent-adolescent communication intervention using four waves of longitudinal data. Results indicate that a brief parent-adolescent communication intervention is effective in improving parent-adolescent communication on sex-related issues and perceived parental monitoring as well as the youth's condom use skills and self-efficacy. There is a marginal effect on consistent condom use. In addition, there is an apparent dose effect of the brief parent intervention on perceived parent-adolescent sexual risk communication and adolescent outcomes. These findings suggest that adolescent risk reduction interventions should include a brief parent-adolescent communication intervention which should be reinforced by periodic boosters in order to enhance the <span class="hlt">impact</span> of adolescent HIV prevention programs. PMID:25490732</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li class="active"><span>7</span></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_7 --> <div id="page_8" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li class="active"><span>8</span></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="141"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/25490732','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/25490732"><span id="translatedtitle">The <span class="hlt">impact</span> of parent <span class="hlt">involvement</span> in an effective adolescent risk reduction intervention on sexual risk communication and adolescent outcomes.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wang, Bo; Stanton, Bonita; Deveaux, Lynette; Li, Xiaoming; Koci, Veronica; Lunn, Sonja</p> <p>2014-12-01</p> <p>Parent <span class="hlt">involvement</span> in prevention efforts targeting adolescents increases the <span class="hlt">impact</span> of such programs. However, the majority of risk-reduction intervention programs that are implemented through schools do not include parents, in part because most existing parental interventions require significant time commitment by parents. We designed a brief parent-adolescent sexual risk communication intervention to be delivered with an effective HIV prevention intervention as part of a randomized, controlled trial among 2,564 grade 10 students and their parents in the Bahamas. Mixed effects modeling analysis was conducted to evaluate the effect of the brief parent-adolescent communication intervention using four waves of longitudinal data. Results indicate that a brief parent-adolescent communication intervention is effective in improving parent-adolescent communication on sex-related issues and perceived parental monitoring as well as the youth's condom use skills and self-efficacy. There is a marginal effect on consistent condom use. In addition, there is an apparent dose effect of the brief parent intervention on perceived parent-adolescent sexual risk communication and adolescent outcomes. These findings suggest that adolescent risk reduction interventions should include a brief parent-adolescent communication intervention that should be reinforced by periodic boosters in order to enhance the <span class="hlt">impact</span> of adolescent HIV prevention programs. PMID:25490732</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24050754','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24050754"><span id="translatedtitle">Differences in distal lower extremity tissue masses and mass ratios exist in athletes of sports <span class="hlt">involving</span> repetitive <span class="hlt">impacts</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Schinkel-Ivy, Alison; Burkhart, Timothy A; Andrews, David M</p> <p>2014-01-01</p> <p>This study aimed to examine the effects of sex and sport on the tissue composition of the distal lower extremity of varsity athletes, in sports that <span class="hlt">involve</span> repetitive-<span class="hlt">impact</span> loading patterns. Fat mass, lean mass, bone mineral content and wobbling mass were predicted for the leg and leg + foot segments of varsity basketball, cross-country, soccer and volleyball athletes. The absolute masses were normalised to body mass, and also expressed relative to each other as ratios. Females and males differed on most normalised tissue masses and ratios by 11-101%. Characteristic differences were found in the normalised tissue masses across sports, with the lowest and highest values displayed by cross-country and volleyball (female)/basketball (male) athletes, respectively. Conversely, cross-country athletes had the highest wobbling mass:bone mineral content and lean mass:bone mineral content ratios for females by 10% and 16%, respectively. The differences between sports may be explained in part by different <span class="hlt">impact</span> loading patterns characteristic of each sport. Tissue mass ratio differences between sports may suggest that the ratios of soft to rigid tissues are optimised by the body in response to typical loading patterns, and may therefore be useful in investigations of distal lower extremity injury mechanisms in athletes.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000PhDT.......270C&link_type=ABSTRACT','NASAADS'); return false;" href="http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000PhDT.......270C&link_type=ABSTRACT"><span id="translatedtitle">Binary <span class="hlt">porous</span> convection</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Carey, Michael Richard</p> <p></p> <p>Binary <span class="hlt">porous</span> convection falls into the larger category of pattern formation---a symmetry breaking instability which creates a spatially periodic structure within a homogeneous system. The experiments and model presented in this dissertation indicate that an essential piece of physics is missing from the standard Darcian picture used to describe pattern formation in a <span class="hlt">porous</span> medium convection system. Present theory predicts a bifurcation to an oscillatory state at onset for a binary mixture in a <span class="hlt">porous</span> media over a wide range of experimental parameters (Brand and Steinberg, Physics Letters 93A 333 (1983)). This theory is inadequate in explaining the predominant large amplitude, backward, stationary overturning convection state observed in our experiments after transients have decayed. Convection experiments were visualized with magnetic resonance imaging and performed with a foam medium in slot and cylindrical geometries as well as a rectangular, packed bead system with water-ethanol mixtures. We explore the possibility that the difference between theory and experiment is due to enhanced solutal mixing not included in previous theories. The enhanced mixing of the fluid produces an effective diffusion coefficient that largely suppresses gradients in the concentration field, resulting in single-fluid like behavior. We model the experimental system with a Lorenz truncation of the binary Darcy equations with enhanced mixing. This model predicts results qualitatively similar to experiments: a forward bifurcation to small amplitude oscillations with a secondary backward bifurcation to large amplitude stationary convection. We have also developed an experimental nuclear magnetic resonance technique that measures the effective diffusion coefficient, D = D(v), as a function of velocity, v, for the individual species of the binary mixture simultaneously. However, the mixing effect measured in plug flow experiments is roughly two to three orders of magnitude too small to have</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016JLTP..185..138M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016JLTP..185..138M"><span id="translatedtitle">Adsorption on Highly Ordered <span class="hlt">Porous</span> Alumina</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Mistura, Giampaolo; Bruschi, Lorenzo; Lee, Woo</p> <p>2016-10-01</p> <p><span class="hlt">Porous</span> anodic aluminum oxide (AAO) is characterized by a regular arrangement of the pores with a narrow pore size distribution over extended areas, uniform pore depth, and solid pore walls without micropores. Thanks to significant improvements in anodization techniques, structural engineering of AAO allows to accurately tailor the pore morphology. These features make <span class="hlt">porous</span> AAO an excellent substrate to study adsorption phenomena. In this paper, we review recent experiments <span class="hlt">involving</span> the adsorption in <span class="hlt">porous</span> AAO. Particular attention will be devoted to adsorption in straight and structured pores with a closed end which shed new light on fundamental issues like the origin of hysteresis in closed end pores and the nature of evaporation from ink-bottle pores. The results will be compared to those obtained in other synthetic materials like <span class="hlt">porous</span> silicon and silica.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/20850235','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/20850235"><span id="translatedtitle"><span class="hlt">Impact</span> of <span class="hlt">involved</span> field radiotherapy in partial response after doxorubicin-based chemotherapy for advanced aggressive non-Hodgkin's lymphoma</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Moser, Elizabeth C. . E-mail: e.c.moser@lumc.nl; Kluin-Nelemans, Hanneke C.; Carde, Patrice; Meerwaldt, Jacobus H.; Tirelli, Umberto; Aleman, Berthe M.P.; Baars, Joke; Thomas, Jose; Glabbeke, Martine van; Noordijk, Evert M.</p> <p>2006-11-15</p> <p>Purpose: Whether salvage therapy in patients with advanced aggressive non-Hodgkin's lymphoma (NHL) in partial remission (PR) should consist of radiotherapy or autologous stem-cell transplantation (ASCT) is debatable. We evaluated the <span class="hlt">impact</span> of radiotherapy on outcome in PR patients treated in four successive European Organization for Research and Treatment of Cancer trials for aggressive NHL. Patients and Methods: Records of 974 patients (1980-1999) were reviewed regarding initial response, final outcome, and type and timing of salvage treatment. After 8 cycles of doxorubicin-based chemotherapy, 227 NHL patients were in PR and treated: 114 received <span class="hlt">involved</span> field radiotherapy, 16 ASCT, 93 second-line chemotherapy, and 4 were operated. Overall survival (OS) and progression-free survival (PFS) after radiotherapy were estimated (Kaplan-Meier method) and compared with other treatments (log-rank). <span class="hlt">Impact</span> on survival was evaluated by multivariate analysis (Cox proportional hazards model). Results: The median PFS in PR patients was 4.2 years and 48% remained progression-free at 5 years. Half of the PR patients converted to a complete remission. After conversion, survival was comparable to patients directly in complete remission. Radiotherapy resulted in better OS and PFS compared with other treatments, especially in patients with low to intermediate International Prognostic Index score, bulky disease, or nodal disease only. Correction by multivariate analysis for prognostic factors such as stage, bulky disease, and number of extranodal locations showed that radiotherapy was clearly the most significant factor affecting both OS and PFS. Conclusion: This retrospective analysis demonstrates that radiotherapy can be effective for patients in PR after fully dosed chemotherapy; assessment in a randomized trial (radiotherapy vs. ASCT) is justified.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25519766','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25519766"><span id="translatedtitle"><span class="hlt">Impact</span> of intraoperative magnetic resonance imaging and functional neuronavigation on surgical outcome in patients with gliomas <span class="hlt">involving</span> language areas.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Zhang, Jiashu; Chen, Xiaolei; Zhao, Yan; Wang, Fei; Li, Fangye; Xu, Bainan</p> <p>2015-04-01</p> <p>Balancing the benefit of extensive tumor resection with the consequence of potential postoperative language deficits remains a challenge in glioma surgery <span class="hlt">involving</span> language areas. This study is designed to evaluate the <span class="hlt">impact</span> of intraoperative magnetic resonance imaging (iMRI) and functional neuronavigation on surgical outcome in patients with gliomas <span class="hlt">involving</span> language areas. Two hundred seventeen patients were prospectively enrolled, 124 in the study group underwent iMRI and functional neuronavigation-guided microsurgery and 93 in the control group underwent conventional navigation-guided microsurgery. Extent of tumor volume resection (EoR) and rate of gross total resection (rGTR) were calculated perioperatively. Aphasia quotient (AQ) was assessed to evaluate the change of language function perioperatively and at 6-month follow-up. Survival outcome for glioblastoma, including progression-free survival (PFS) and overall survival (OS), were recorded. In 198 glioma patients (112 in the study group and 86 in the control group), EoR (95.50 versus 89.85%, p < 0.001) and rGTR (69.60 versus 47.70%, p = 0.002) were significantly higher in the study group, and language functions were also better at 6-month follow-up in the study group (87.47 versus 78.73, p = 0.001). Furthermore, postoperative new aphasia occurred in 34.8% of the control group, whereas it occurred only in 2.3% of the study group (p < 0.001). In addition, PFS (12.5 versus 6.6 m, p = 0.003) and OS (19.6 versus 13.0 m, p < 0.001) for patients with glioblastomas were dramatically prolonged in the study group than in the control group. These results indicated that iMRI and functional neuronavigation may help maximize tumor resection, minimize language deficits in patients with gliomas <span class="hlt">involving</span> language areas, and improve survival time for patients with glioblastomas.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/5177290','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/biblio/5177290"><span id="translatedtitle">Ventilation of <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Neeper, D.A.</p> <p>1994-02-22</p> <p>Methods are presented for distributing gases throughout the interstices of <span class="hlt">porous</span> materials and removing volatile substances from the interstices of <span class="hlt">porous</span> materials. Continuous oscillation of pressures and flows results in increased penetration of the interstices by flowing gases and increased transport of gaseous components out of the interstices. The invention is particularly useful in soil vapor extraction. 10 figures.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/869166','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/869166"><span id="translatedtitle">Ventilation of <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Neeper, Donald A.</p> <p>1994-01-01</p> <p>Methods for distributing gases throughout the interstices of <span class="hlt">porous</span> materials and removing volatile substances from the interstices of <span class="hlt">porous</span> materials. Continuous oscillation of pressures and flows results in increased penetration of the interstices by flowing gases and increased transport of gaseous components out of the interstices. The invention is particularly useful in soil vapor extraction.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/415139','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/415139"><span id="translatedtitle"><span class="hlt">Porous</span> silicon gettering</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Tsuo, Y.S.; Menna, P.; Al-Jassim, M.</p> <p>1995-08-01</p> <p>We have studied a novel extrinsic gettering method that utilizes the very large surface areas, produced by <span class="hlt">porous</span> silicon etch on both front and back surfaces of the silicon wafer, as gettering sites. In this method, a simple and low-cost chemical etching is used to generate the <span class="hlt">porous</span> silicon layers. Then, a high-flux solar furnace (HFSF) is used to provide high-temperature annealing and the required injection of silicon interstitials. The gettering sites, along with the gettered impurities, can be easily removed at the end the process. The <span class="hlt">porous</span> silicon removal process consists of oxidizing the <span class="hlt">porous</span> silicon near the end the gettering process followed by sample immersion in HF acid. Each <span class="hlt">porous</span> silicon gettering process removes up to about 10 {mu}m of wafer thickness. This gettering process can be repeated so that the desired purity level is obtained.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=high+AND+involvement+AND+product&pg=5&id=ED547953','ERIC'); return false;" href="http://eric.ed.gov/?q=high+AND+involvement+AND+product&pg=5&id=ED547953"><span id="translatedtitle">The <span class="hlt">Impact</span> of <span class="hlt">Involvement</span> of African American Parents on Students' Achievement in a Middle School</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Lopez, Raquel</p> <p>2012-01-01</p> <p>This applied dissertation was designed to provide better understanding of issues related to parental <span class="hlt">involvement</span> to school officials and scholars. The parental <span class="hlt">involvement</span> at the school was very low and academic achievement was also low. The school leaders were requested to increase parental <span class="hlt">involvement</span> and the School Improvement Plan specified…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23651639','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23651639"><span id="translatedtitle">The <span class="hlt">impact</span> of sexual enhancement alcohol expectancies and risky behavior on alcohol-<span class="hlt">involved</span> rape among college women.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Messman-Moore, Terri L; Ward, Rose Marie; DeNardi, Kathleen A</p> <p>2013-04-01</p> <p>A structural equation model examined sexual enhancement alcohol expectancies, heavy episodic drinking (HED), and risky sexual behavior as correlates of alcohol-<span class="hlt">involved</span> rape in a sample of 353 college women. Prevalence of alcohol-<span class="hlt">involved</span> rape was 15.6%. Sexual enhancement alcohol expectancies were indirectly associated with alcohol-<span class="hlt">involved</span> rape via increased levels of HED, greater likelihood of sex while intoxicated, and number of sex partners. All forms of risky behavior were associated with alcohol-<span class="hlt">involved</span> rape although HED had the strongest relationship. Findings suggest continued focus on women's positive alcohol expectancies and HED as risk factors for alcohol-<span class="hlt">involved</span> rape. Implications for intervention will be discussed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4067891','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4067891"><span id="translatedtitle">Exploring perceived barriers, drivers, <span class="hlt">impacts</span> and the need for evaluation of public <span class="hlt">involvement</span> in health and social care research: a modified Delphi study</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Snape, D; Kirkham, J; Britten, N; Froggatt, K; Gradinger, F; Lobban, F; Popay, Jennie; Wyatt, K; Jacoby, Ann</p> <p>2014-01-01</p> <p>Objective To explore areas of consensus and conflict in relation to perceived public <span class="hlt">involvement</span> (PI) barriers and drivers, perceived <span class="hlt">impacts</span> of PI and ways of evaluating PI approaches in health and social care research. Background Internationally and within the UK the recognition of potential benefits of PI in health and social care research is gathering momentum and PI is increasingly identified by organisations as a prerequisite for funding. However, there is relatively little examination of the <span class="hlt">impacts</span> of PI and how those <span class="hlt">impacts</span> might be measured. Design Mixed method, three-phase, modified Delphi technique, conducted as part of a larger MRC multiphase project. Sample Clinical and non-clinical academics, members of the public, research managers, commissioners and funders. Findings This study found high levels of consensus about the most important barriers and drivers to PI. There was acknowledgement that tokenism was common in relation to PI; and strong support for the view that demonstrating the <span class="hlt">impacts</span> and value of PI was made more difficult by tokenistic practice. PI was seen as having intrinsic value; nonetheless, there was clear support for the importance of evaluating its <span class="hlt">impact</span>. Research team cohesion and appropriate resources were considered essential to effective PI implementation. Panellists agreed that PI can be challenging, but can be facilitated by clear guidance, together with models of good practice and measurable standards. Conclusions This study is the first to present empirical evidence of the opinions voiced by key stakeholders on areas of consensus and conflict in relation to perceived PI barriers and drivers, perceived <span class="hlt">impacts</span> of PI and the need to evaluate PI. As such it further contributes to debate around best practice in PI, the potential for tokenism and how best to evaluate the <span class="hlt">impacts</span> of PI. These findings have been used in the development of the Public <span class="hlt">Involvement</span> <span class="hlt">Impact</span> Assessment Framework (PiiAF), an online resource which offers</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=influence+AND+%22the+assessment%22&pg=4&id=EJ1017601','ERIC'); return false;" href="http://eric.ed.gov/?q=influence+AND+%22the+assessment%22&pg=4&id=EJ1017601"><span id="translatedtitle">The <span class="hlt">Impact</span> of Teachers' and Supervisors' <span class="hlt">Involvement</span> on Students' Skill and Affective Development in Service-Learning</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Leemen, Lee</p> <p>2013-01-01</p> <p>The study reported an assessment of a university-wide curriculum-based service learning program and, based on the assessment data, analyzed the <span class="hlt">impact</span> of teachers' and supervisors' <span class="hlt">involvement</span> on students' skill and affective learning outcomes. The study (n=750) showed that in general the students agreed that their participation in…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=african+AND+governance&pg=7&id=ED513677','ERIC'); return false;" href="http://eric.ed.gov/?q=african+AND+governance&pg=7&id=ED513677"><span id="translatedtitle">An Investigation of the <span class="hlt">Impact</span> of Student Government <span class="hlt">Involvement</span> at One Public Historically Black University on the Career Choice of African American Student Participants</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Laosebikan-Buggs, Morolake O.</p> <p>2009-01-01</p> <p>The purpose of this study was to investigate student participation in collegiate student governance, the <span class="hlt">impact</span> of that <span class="hlt">involvement</span> and its influence on career choice for African-American participants, and to enlighten educators about role and value of collegiate student government participation. If participation in student government and…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016AdWR...95...61Z','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016AdWR...95...61Z"><span id="translatedtitle">A lattice Boltzmann study on the <span class="hlt">impact</span> of the geometrical properties of <span class="hlt">porous</span> media on the steady state relative permeabilities on two-phase immiscible flows</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Zhang, Duo; Papadikis, K.; Gu, Sai</p> <p>2016-09-01</p> <p>In the current paper, the effect of the geometrical characteristics of 2-D <span class="hlt">porous</span> media on the relative permeability in immiscible two-phase flows is studied. The generation of the different artificial <span class="hlt">porous</span> media is performed using a Boolean model based on a random distribution of overlapping circles/ellipses, the size and shape of which are chosen to satisfy the specific Minkowski functionals (i.e. volume fraction, solid line contour length, connectivity). The study aims to identify how each different Minkowski functional affects the relative permeability of each phase at various saturations of the non-wetting phase. A 2-D multi-relaxation time (MRT) lattice Boltzmann model (LBM) that can handle high density ratios is employed in the simulation. The relationship between the driving forces G and the relative permeabilities of the two phases for every artificial structure is quantified. It is found that for high non-wetting phase saturations (fully connected flow), a non-linear relationship exists between the non-wetting phase flow rate and the driving force, whilst this relationship becomes linear at higher magnitudes of the latter. The force magnitude required to approach the linear region is highly influenced by the pore size distribution and the connectivity of the solid phase. For lower non-wetting phase saturation values, its relative permeability in the linear regime decreases as the fraction of small pores in the structure increases and the non-wetting phase flow becomes disconnected. A strong influence of the solid phase connectivity is also observed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1064437','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1064437"><span id="translatedtitle">Preparation of asymmetric <span class="hlt">porous</span> materials</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Coker, Eric N.</p> <p>2012-08-07</p> <p>A method for preparing an asymmetric <span class="hlt">porous</span> material by depositing a <span class="hlt">porous</span> material film on a flexible substrate, and applying an anisotropic stress to the <span class="hlt">porous</span> media on the flexible substrate, where the anisotropic stress results from a stress such as an applied mechanical force, a thermal gradient, and an applied voltage, to form an asymmetric <span class="hlt">porous</span> material.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20080004797','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20080004797"><span id="translatedtitle">Fabricating <span class="hlt">porous</span> silicon carbide</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Shor, Joseph S. (Inventor); Kurtz, Anthony D. (Inventor)</p> <p>1994-01-01</p> <p>The formation of <span class="hlt">porous</span> SiC occurs under electrochemical anodization. A sample of SiC is contacted electrically with nickel and placed into an electrochemical cell which cell includes a counter electrode and a reference electrode. The sample is encapsulated so that only a bare semiconductor surface is exposed. The electrochemical cell is filled with an HF electrolyte which dissolves the SiC electrochemically. A potential is applied to the semiconductor and UV light illuminates the surface of the semiconductor. By controlling the light intensity, the potential and the doping level, a <span class="hlt">porous</span> layer is formed in the semiconductor and thus one produces <span class="hlt">porous</span> SiC.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1041028','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1041028"><span id="translatedtitle"><span class="hlt">POROUS</span> WALL, HOLLOW GLASS MICROSPHERES</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Sexton, W.</p> <p>2012-06-30</p> <p>Hollow Glass Microspheres (HGM) is not a new technology. All one has to do is go to the internet and Google{trademark} HGM. Anyone can buy HGM and they have a wide variety of uses. HGM are usually between 1 to 100 microns in diameter, although their size can range from 100 nanometers to 5 millimeters in diameter. HGM are used as lightweight filler in composite materials such as syntactic foam and lightweight concrete. In 1968 a patent was issued to W. Beck of the 3M{trademark} Company for 'Glass Bubbles Prepared by Reheating Solid Glass Particles'. In 1983 P. Howell was issued a patent for 'Glass Bubbles of Increased Collapse Strength' and in 1988 H. Marshall was issued a patent for 'Glass Microbubbles'. Now Google{trademark}, <span class="hlt">Porous</span> Wall, Hollow Glass Microspheres (PW-HGMs), the key words here are <span class="hlt">Porous</span> Wall. Almost every article has its beginning with the research done at the Savannah River National Laboratory (SRNL). The Savannah River Site (SRS) where SRNL is located has a long and successful history of working with hydrogen and its isotopes for national security, energy, waste management and environmental remediation applications. This includes more than 30 years of experience developing, processing, and implementing special ceramics, including glasses for a variety of Department of Energy (DOE) missions. In the case of glasses, SRS and SRNL have been <span class="hlt">involved</span> in both the science and engineering of vitreous or glass based systems. As a part of this glass experience and expertise, SRNL has developed a number of niches in the glass arena, one of which is the development of <span class="hlt">porous</span> glass systems for a variety of applications. These <span class="hlt">porous</span> glass systems include sol gel glasses, which include both xerogels and aerogels, as well as phase separated glass compositions, that can be subsequently treated to produce another unique type of porosity within the glass forms. The <span class="hlt">porous</span> glasses can increase the surface area compared to 'normal glasses of a 1 to 2 order of</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1013836','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1013836"><span id="translatedtitle">Method to prepare nanoparticles on <span class="hlt">porous</span> mediums</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Vieth, Gabriel M [Knoxville, TN; Dudney, Nancy J [Oak Ridge, TN; Dai, Sheng [Knoxville, TN</p> <p>2010-08-10</p> <p>A method to prepare <span class="hlt">porous</span> medium decorated with nanoparticles <span class="hlt">involves</span> contacting a suspension of nanoparticles in an ionic liquid with a <span class="hlt">porous</span> medium such that the particles diffuse into the pores of the medium followed by heating the resulting composition to a temperature equal to or greater than the thermal decomposition temperature of the ionic liquid resulting in the removal of the liquid portion of the suspension. The nanoparticles can be a metal, an alloy, or a metal compound. The resulting compositions can be used as catalysts, sensors, or separators.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/EJ1032271.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/EJ1032271.pdf"><span id="translatedtitle">The <span class="hlt">Impact</span> of a Collaborative Family <span class="hlt">Involvement</span> Program on Latino Families and Children's Educational Performance</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>O'Donnell, Julie; Kirkner, Sandra L.</p> <p>2014-01-01</p> <p>Latino families highly value education and are committed to their children's educational success; however, Latino students often experience educational challenges. Well-designed family <span class="hlt">involvement</span> programs can encourage Latino families, especially new immigrants or monolingual Spanish-speakers, to increase their <span class="hlt">involvement</span> resulting in…</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li class="active"><span>8</span></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_8 --> <div id="page_9" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li class="active"><span>9</span></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="161"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/EJ1092708.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/EJ1092708.pdf"><span id="translatedtitle">Predictors of Parent <span class="hlt">Involvement</span> and Their <span class="hlt">Impact</span> on Access of Postsecondary Education Facilitators among White and American Indian Parents</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Bardhoshi, Gerta; Duncan, Kelly; Schweinle, Amy</p> <p>2016-01-01</p> <p>This study examined demographic factors as predictors of parent <span class="hlt">involvement</span> (engagement with school, support of learning, support of child) among parents of children that attended a school implementing a college access program. The authors also examined whether <span class="hlt">involvement</span> predicted access of postsecondary education facilitators in parents, when…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=high+AND+involvement+AND+product&id=ED557858','ERIC'); return false;" href="http://eric.ed.gov/?q=high+AND+involvement+AND+product&id=ED557858"><span id="translatedtitle">Beginning High School Teachers' Perceptions of <span class="hlt">Involvement</span> in Professional Learning Communities and Its <span class="hlt">Impact</span> on Teacher Retention</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Lovett, Helen Tomlinson</p> <p>2013-01-01</p> <p>The purpose of this study was to examine beginning high school teachers' perceptions of <span class="hlt">involvement</span> in Professional Learning Communities in southeastern North Carolina and to determine whether beginning teachers' perceptions of <span class="hlt">involvement</span> in Professional Learning Communities influenced their decisions to move to another location, stay in…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1018059','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1018059"><span id="translatedtitle">Metal filled <span class="hlt">porous</span> carbon</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Gross, Adam F.; Vajo, John J.; Cumberland, Robert W.; Liu, Ping; Salguero, Tina T.</p> <p>2011-03-22</p> <p>A <span class="hlt">porous</span> carbon scaffold with a surface and pores, the <span class="hlt">porous</span> carbon scaffold containing a primary metal and a secondary metal, where the primary metal is a metal that does not wet the surface of the pores of the carbon scaffold but wets the surface of the secondary metal, and the secondary metal is interspersed between the surface of the pores of the carbon scaffold and the primary metal.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005JSG....27.1469J&link_type=ABSTRACT','NASAADS'); return false;" href="http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005JSG....27.1469J&link_type=ABSTRACT"><span id="translatedtitle">The <span class="hlt">impact</span> of syn-faulting porosity reduction on damage zone architecture in <span class="hlt">porous</span> sandstone: an outcrop example from the Moab Fault, Utah</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Johansen, Tord Erlend Skeie; Fossen, Haakon; Kluge, Richard</p> <p>2005-08-01</p> <p>Deformation structures in the Jurassic Moab Member of the Entrada Sandstone have been studied in the Courthouse area where two major fault segments (Segments A and B) of the Moab Fault are connected. Field data show that Segment A developed from an early stage of (thick) deformation band formation and that distinctively thinner deformation bands and fractures were subsequently added to its damage zone at a later stage. Only the second stage is expressed along Segment B. Geometric and kinematic evidence indicates that Segment B linked with Segment A at the time when Segment A (and its thick deformation bands) was already present in the Courthouse area. We attribute the transition from thick deformation bands to thin deformation bands to pore-space reduction caused by syn-faulting quartz dissolution and precipitation that changed the mechanical properties of the rock. In this model, thin deformation bands formed as porosity was reduced during quartz diagenesis. The observations underscore the importance of syn-kinematic diagenetic changes and the variation in small-scale structures along faults that apparently formed during the same faulting event in <span class="hlt">porous</span> sandstones.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015JPS...287..422T','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015JPS...287..422T"><span id="translatedtitle"><span class="hlt">Impact</span> of micro-<span class="hlt">porous</span> layer on liquid water distribution at the catalyst layer interface and cell performance in a polymer electrolyte membrane fuel cell</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Tabe, Yutaka; Aoyama, Yusuke; Kadowaki, Kazumasa; Suzuki, Kengo; Chikahisa, Takemi</p> <p>2015-08-01</p> <p>In polymer electrolyte membrane fuel cells, a gas diffusion layer (GDL) with a micro-<span class="hlt">porous</span> layer (MPL) gives better anti-flooding performance than GDLs without an MPL. To investigate the function and mechanism of the MPL to suppress water flooding, the liquid water distribution at the cathode catalyst layer (CL) surface are observed by a freezing method; in the method liquid water is immobilized in ice form by rapid freezing, followed by disassembling the cell for observations. The ice covered area is quantified by image processing and cells with and without an MPL are compared. The results show that the MPL suppresses water accumulation at the interface due to smaller pore size and finer contact with the CL, and this results in less water flooding. Investigation of ice formed after -10 °C cold start shutdowns and the temporary performance deterioration at ordinary temperatures also indicates a significant influence of the liquid water accumulating at the interface. The importance of the fine contact between CL and MPL, the relative absence of gaps, is demonstrated by a gas diffusion electrode (GDE) which is directly coated with catalyst ink on the surface of the MPL achieving finer contact of the layers.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2010EGUGA..12.4017A','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2010EGUGA..12.4017A"><span id="translatedtitle">Resurgence flows in <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Adler, Pierre; Mityushev, Vladimir</p> <p>2010-05-01</p> <p> which relate distant points of the continuous medium. These two structures have already been studied separately in previous works (see (1) and the literature therein). Networks were addressed by graph theory and an extensive literature has been devoted to studies of <span class="hlt">porous</span> media on the Darcy scale. For sake of simplicity, a simple physical presentation and elementary solutions are first given for one dimensional structures which display unexpected features such as an apparent back flow which goes against the main pressure gradient. Then, a general formulation is proposed which <span class="hlt">involves</span> some non local aspects. When the sizes of the connection zones between the network and the continuous medium are assumed to be small with respect to any linear size in the continuous medium, analytical solutions are obtained in two or three dimensions for spatially periodic structures which are adequate to model spatially homogenous media. The equivalent permeability of the medium is determined. Some elementary examples are worked out in two and three dimensions. Paradoxical flow patterns are obtained with back flow even with local resurgences (3). Unsteady problems are presently studied. (1) P.M. Adler, Fractures and fracture networks, Kluwer, 1999. (2) P.M. Adler, <span class="hlt">Porous</span> media. Geometry and transport. Butterworth-Heinemann, Stoneham, Ma, 1992. (3) P. M. Adler, V. Mityushev, Resurgence flows in <span class="hlt">porous</span> media, Phys. Rev. E 79, 026310, 2009.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20030059013','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20030059013"><span id="translatedtitle">Application of Passive <span class="hlt">Porous</span> Treatment to Slat Trailing Edge Noise</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Khorrami, Mehdi R.; Choudhari, Meelan M.</p> <p>2003-01-01</p> <p><span class="hlt">Porous</span> trailing-edge treatment is investigated as a passive means for slat noise reduction by using time-accurate simulations based on Reynolds-averaged Navier-Stokes equations. For the model scale high-lift configuration used during previous experiments in the Low-Turbulence Pressure Tunnel at NASA Langley Research Center, application of the proposed treatment over a minute fraction of the slat surface area is shown to mitigate the noise <span class="hlt">impact</span> of the trailing edge, with no measurable aerodynamic penalty. Assessment of the pressure fluctuations in the vicinity of the treated edge indicates a potential noise reduction in excess of 20 dB. The primary mechanism underlying this reduction is related to the reduced strength of Strouhal shedding from the finite thickness trailing edge. A secondary effect of the treatment <span class="hlt">involves</span> an upward shift in the Strouhal-shedding frequency to a frequency band of reduced auditory sensitivity in a full-scale application.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015HMT....51..313M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015HMT....51..313M"><span id="translatedtitle">Scaling heat and mass flow through <span class="hlt">porous</span> media during pyrolysis</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Maes, Julien; Muggeridge, Ann H.; Jackson, Matthew D.; Quintard, Michel; Lapene, Alexandre</p> <p>2015-03-01</p> <p>The modelling of heat and mass flow through <span class="hlt">porous</span> media in the presence of pyrolysis is complex because various physical and chemical phenomena need to be represented. In addition to the transport of heat by conduction and convection, and the change of properties with varying pressure and temperature, these processes <span class="hlt">involve</span> transport of mass by convection, evaporation, condensation and pyrolysis chemical reactions. Examples of such processes include pyrolysis of wood, thermal decomposition of polymer composite and in situ upgrading of heavy oil and oil shale. The behaviours of these systems are difficult to predict as relatively small changes in the material composition can significantly change the thermophysical properties. Scaling reduces the number of parameters in the problem statement and quantifies the relative importance of the various dimensional parameters such as permeability, thermal conduction and reaction constants. This paper uses inspectional analysis to determine the minimum number of dimensionless scaling groups that describe the decomposition of a solid <span class="hlt">porous</span> material into a gas in one dimension. Experimental design is then used to rank these scaling groups in terms of their importance in describing the outcome of two example processes: the thermal decomposition of heat shields formed from polymer composites and the in situ upgrading of heavy oils and oil shales. A sensitivity analysis is used to divide these groups into three sets (primary, secondary and insignificant), thus identifying the combinations of solid and fluid properties that have the most <span class="hlt">impact</span> on the performance of the different processes.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Critical+AND+sociological+AND+theory&pg=3&id=EJ1051177','ERIC'); return false;" href="http://eric.ed.gov/?q=Critical+AND+sociological+AND+theory&pg=3&id=EJ1051177"><span id="translatedtitle">The <span class="hlt">Impact</span> of Self-Concept and College <span class="hlt">Involvement</span> on the First-Year Success of Medical Students in China</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Zhou, Ying-Xue; Ou, Chun-Quan; Zhao, Zhi-Tao; Wan, Cheng-Song; Guo, Cui; Li, Li; Chen, Ping-Yan</p> <p>2015-01-01</p> <p>Students' first-year academic success plays a critical role on their overall development in college, which implies the need to concentrate on identifying ways to improve students' first-year academic success. Different from most research on the subject, this study attempted to combine the sociological perspective of college <span class="hlt">impact</span> with a…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=msds&pg=2&id=EJ780334','ERIC'); return false;" href="http://eric.ed.gov/?q=msds&pg=2&id=EJ780334"><span id="translatedtitle">The <span class="hlt">Impact</span> of Partner Training on the Communicative <span class="hlt">Involvement</span> of Students with Multiple and Severe Disability in Special Schools</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Foreman, Phil; Arthur-Kelly, Michael; Pascoe, Sue</p> <p>2007-01-01</p> <p>Background: The outcomes of a pilot program of staff development in communication support in the context of observed changes in student behaviour states and interactive abilities are reported. Participant reports about the <span class="hlt">impact</span> of the program on their professional practices are included. Method: Six teachers and six teacher aides in special…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=KREBS&pg=5&id=EJ842258','ERIC'); return false;" href="http://eric.ed.gov/?q=KREBS&pg=5&id=EJ842258"><span id="translatedtitle">The <span class="hlt">Impact</span> of Residential and Nonresidential Drug Treatment on Recidivism among Drug-<span class="hlt">Involved</span> Probationers: A Survival Analysis</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Krebs, Christopher P.; Strom, Kevin J.; Koetse, Willem H.; Lattimore, Pamela K.</p> <p>2009-01-01</p> <p>A variety of approaches for addressing drug use and drug-related crime among the nearly 5 million offenders on community supervision in the United States has been tried and evaluated, but questions remain about which policies or programs are most effective. The authors use a large data set to assess the <span class="hlt">impact</span> of residential and nonresidential…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/5687531','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/5687531"><span id="translatedtitle">Factors <span class="hlt">involved</span> in evaluating ground water <span class="hlt">impacts</span> of deep coal mine drainage. [Pumping tests of wells drilled into the coal seam and development of mathematical models; detailed discussion</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Davis, P.R.; Walton, W.C.</p> <p>1982-10-01</p> <p>The determination of probable ground water <span class="hlt">impacts</span> of proposed deep coal mining is required as part of permit applications. <span class="hlt">Impact</span> prediction generally <span class="hlt">involves</span> well production test analysis and modeling of ground water systems associated with coal seams. Well production tests are often complicated due to the relatively low permeabilities of sandstones and shales of ground water systems. The effects of the release of water stored within finite diameter production wells must be considered. Well storage capacity appreciably affects early well production test time drawdown or time recovery data. Low pumping rates, limited cones of depression, and length of required pumping periods are important well production test design factors. Coal seam ground water system models are usually multilayered and leaky artesian. Mine shafts partially penetrate the ground water system. Simulation of coal mine drainage often <span class="hlt">involves</span> the horizontal permeability and storage coefficient of the coal seam zone, vertical permeablities of sandstones and shales (aquifer) above and below the coal seam zone, and the hydrologic properties of the source bed above the aquifer overlying the coal seam zone. Ground water level declines in both the coal seam zone and source bed near land surface are necessary factors in <span class="hlt">impact</span> analysis. An example of evaluation studies in southwest Indiana will illustrate factors <span class="hlt">involved</span> in deep coal mine drainage modeling efforts.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Rectification&id=EJ1032408','ERIC'); return false;" href="http://eric.ed.gov/?q=Rectification&id=EJ1032408"><span id="translatedtitle">Policy and the <span class="hlt">Impact</span> on Placement, <span class="hlt">Involvement</span>, and Progress in General Education: Critical Issues That Require Rectification</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Ryndak, Diane Lea; Taub, Debbie; Jorgensen, Cheryl M.; Gonsier-Gerdin, Jean; Arndt, Katrina; Sauer, Janet; Ruppar, Andrea L.; Morningstar, Mary E.; Allcock, Heather</p> <p>2014-01-01</p> <p>Students with significant disabilities continue to be among the most segregated in schools. In this article, we argue that the principles of least restrictive environment and <span class="hlt">involvement</span> and progress in the general curriculum have been interpreted in ways that perpetuate segregation, rather than increasing students' access to meaningful…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=diabetes&pg=3&id=EJ1028945','ERIC'); return false;" href="http://eric.ed.gov/?q=diabetes&pg=3&id=EJ1028945"><span id="translatedtitle"><span class="hlt">Impact</span> of a District-Wide Diabetes Prevention Programme <span class="hlt">Involving</span> Health Education for Children and the Community</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Sheeladevi, Sethu; Sagar, Jayanthi; Pujari, Siddharth; Rani, Padmaja Kumari</p> <p>2014-01-01</p> <p>Objective: To present results from a district-wide diabetes prevention programme <span class="hlt">involving</span> health education for school children and the local community. Method: The model of health education that was utilized aimed to secure lifestyle changes and the identification of diabetes risk by school children (aged 9-12 years). The children acted as health…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/15813540','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/15813540"><span id="translatedtitle">The effect of electron beam irradiation on forensic evidence. 1. Latent print recovery on <span class="hlt">porous</span> and non-<span class="hlt">porous</span> surfaces.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Ramotowski, Robert S; Regen, Erin M</p> <p>2005-03-01</p> <p>The recent use of the postal system as a means of delivering anthrax spores via several contaminated envelopes has led to the selective irradiation of mail. These as yet unsolved attacks and the U.S. Postal Service's decision to irradiate certain types of mail has led to some unexpected complications. The high doses of radiation required to destroy biological agents like anthrax are sufficient to induce damage to other materials present in the envelope. There have been reports of damage to many different items that have been subjected to irradiation, including paper, precious gems, plastic, computer discs, and electronics. However, few studies have examined the effect of such treatments on items of forensic interest. In this paper, the authors focused on the <span class="hlt">impact</span> of the irradiation process on the ability to visualize latent prints. This experiment <span class="hlt">involved</span> using several donors, substrates (both <span class="hlt">porous</span> and non-<span class="hlt">porous</span>), and visualization reagents. The results indicate that the irradiation process can have a detrimental effect on the success of certain visualization reagents.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/230563','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/230563"><span id="translatedtitle">Parametric study of boiling heat transfer in <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Shi, B.; Jones, B.G.; Pan, C.</p> <p>1996-04-01</p> <p>Detailed numerical modeling and parametric variation studies were conducted on boiling heat transfer processes in <span class="hlt">porous</span> deposits with emphasis on applications associated with light water nuclear power reactor systems. The processes of boiling heat transfer in the <span class="hlt">porous</span> corrosion deposits typically <span class="hlt">involve</span> phase changes in finite volumetric regions in the <span class="hlt">porous</span> media. The study examined such processes in two <span class="hlt">porous</span> media configurations, without chimneys (homogeneous <span class="hlt">porous</span> structures) and with chimneys (heterogeneous <span class="hlt">porous</span> structures). A 1-D model and a 2-D model were developed to simulate two-phase flows with phase changes, without dry-out, inside the <span class="hlt">porous</span> media for both structural configurations. For closure of the governing equations, an empirical correlation of the evaporation rate for phase changes inside the <span class="hlt">porous</span> media was introduced. In addition, numerical algorithms were developed to solve the coupled nonlinear equations of mass, momentum, energy, capillary pressure, and evaporation rate. The distributions of temperature, thermodynamic saturation, liquid pressure, vapor pressure, liquid velocity, and vapor velocity were predicted. Furthermore, the effects of heat flux, system pressure, porosity, particle diameter, chimney population density, chimney radius, and crud thickness on the all superheat, critical heat flux, and minimum saturation were examined. The predictions were found to be in good agreement with the available experimental results.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/21869999','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/21869999"><span id="translatedtitle"><span class="hlt">Porous</span> silicon nanowires.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Qu, Yongquan; Zhou, Hailong; Duan, Xiangfeng</p> <p>2011-10-01</p> <p>In this mini-review, we summarize recent progress in the synthesis, properties and applications of a new type of one-dimensional nanostructures-single crystalline <span class="hlt">porous</span> silicon nanowires. The growth of <span class="hlt">porous</span> silicon nanowires starting from both p- and n-type Si wafers with a variety of dopant concentrations can be achieved through either one-step or two-step reactions. The mechanistic studies indicate the dopant concentration of Si wafers, oxidizer concentration, etching time and temperature can affect the morphology of the as-etched silicon nanowires. The <span class="hlt">porous</span> silicon nanowires are both optically and electronically active and have been explored for potential applications in diverse areas including photocatalysis, lithium ion batteries, gas sensors and drug delivery.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/5866567','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/5866567"><span id="translatedtitle">Foams in <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Marsden, S.S.</p> <p>1986-07-01</p> <p>In 1978 a literature search on selective blocking of fluid flow in <span class="hlt">porous</span> media was done by Professor S.S. Marsden and two of his graduate students, Tom Elson and Kern Huppy. This was presented as SUPRI Report No. TR-3 entitled ''Literature Preview of the Selected Blockage of Fluids in Thermal Recovery Projects.'' Since then a lot of research on foam in <span class="hlt">porous</span> media has been done on the SUPRI project and a great deal of new information has appeared in the literature. Therefore we believed that a new, up-to-date search should be done on foam alone, one which would be helpful to our students and perhaps of interest to others. This is a chronological survey showing the development of foam flow, blockage and use in <span class="hlt">porous</span> media, starting with laboratory studies and eventually getting into field tests and demonstrations. It is arbitrarily divided into five-year time periods. 81 refs.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1040878','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1040878"><span id="translatedtitle"><span class="hlt">Porous</span> material neutron detector</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Diawara, Yacouba; Kocsis, Menyhert</p> <p>2012-04-10</p> <p>A neutron detector employs a <span class="hlt">porous</span> material layer including pores between nanoparticles. The composition of the nanoparticles is selected to cause emission of electrons upon detection of a neutron. The nanoparticles have a maximum dimension that is in the range from 0.1 micron to 1 millimeter, and can be sintered with pores thereamongst. A passing radiation generates electrons at one or more nanoparticles, some of which are scattered into a pore and directed toward a direction opposite to the applied electrical field. These electrons travel through the pore and collide with additional nanoparticles, which generate more electrons. The electrons are amplified in a cascade reaction that occurs along the pores behind the initial detection point. An electron amplification device may be placed behind the <span class="hlt">porous</span> material layer to further amplify the electrons exiting the <span class="hlt">porous</span> material layer.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=104339&keyword=Geology&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50&CFID=68461589&CFTOKEN=21992975','EPA-EIMS'); return false;" href="http://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=104339&keyword=Geology&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50&CFID=68461589&CFTOKEN=21992975"><span id="translatedtitle">FLUID TRANSPORT THROUGH <span class="hlt">POROUS</span> MEDIA</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>Fluid transport through <span class="hlt">porous</span> media is a relevant topic to many scientific and engineering fields. Soil scientists, civil engineers, hydrologists and hydrogeologists are concerned with the transport of water, gases and nonaqueous phase liquid contaminants through <span class="hlt">porous</span> earth m...</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li class="active"><span>9</span></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_9 --> <div id="page_10" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li class="active"><span>10</span></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="181"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4459695','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4459695"><span id="translatedtitle">What Difference Does Patient and Public <span class="hlt">Involvement</span> Make and What Are Its Pathways to <span class="hlt">Impact</span>? Qualitative Study of Patients and Researchers from a Cohort of Randomised Clinical Trials</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Dudley, Louise; Gamble, Carrol; Preston, Jennifer; Buck, Deborah; Hanley, Bec; Williamson, Paula; Young, Bridget</p> <p>2015-01-01</p> <p>Background Patient and public <span class="hlt">involvement</span> (PPI) is advocated in clinical trials yet evidence on how to optimise its <span class="hlt">impact</span> is limited. We explored researchers' and PPI contributors' accounts of the <span class="hlt">impact</span> of PPI within trials and factors likely to influence its <span class="hlt">impact</span>. Methods Semi-structured qualitative interviews with researchers and PPI contributors accessed through a cohort of randomised clinical trials. Analysis of transcripts of audio-recorded interviews was informed by the principles of the constant comparative method, elements of content analysis and informant triangulation. Results We interviewed 21 chief investigators, 10 trial managers and 17 PPI contributors from 28 trials. The accounts of informants within the same trials were largely in agreement. Over half the informants indicted PPI had made a difference within a trial, through contributions that influenced either an aspect of a trial, or how researchers thought about a trial. According to informants, the opportunity for PPI to make a difference was influenced by two main factors: whether chief investigators had goals and plans for PPI and the quality of the relationship between the research team and the PPI contributors. Early <span class="hlt">involvement</span> of PPI contributors and including them in responsive (e.g. advisory groups) and managerial (e.g. trial management groups) roles were more likely to achieve <span class="hlt">impact</span> compared to late <span class="hlt">involvement</span> and oversight roles (e.g. trial steering committees). Conclusion Those seeking to enhance PPI in trials should develop goals for PPI at an early stage that fits the needs of the trial, plan PPI implementation in accordance with these goals, invest in developing good relationships between PPI contributors and researchers, and favour responsive and managerial roles for contributors in preference to oversight-only roles. These features could be used by research funders in judging PPI in trial grant applications and to inform policies to optimise PPI within trials. PMID:26053063</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009AGUFM.H14B..09A','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009AGUFM.H14B..09A"><span id="translatedtitle">Resurgence flows in <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Adler, P. M.; Mityushev, V.</p> <p>2009-12-01</p> <p> been studied separately in previous works (see (1) and the literature therein). Networks were addressed by graph theory and an extensive literature has been devoted to studies of <span class="hlt">porous</span> media on the Darcy scale. For sake of simplicity, a simple physical presentation and elementary solutions are first given for one dimensional structures which display unexpected features such as an apparent back flow which goes against the main pressure gradient. Then, a general formulation is proposed which <span class="hlt">involves</span> some non local aspects. When the sizes of the connection zones between the network and the continuous medium are assumed to be small with respect to any linear size in the continuous medium, analytical solutions are obtained in two or three dimensions for spatially periodic structures which are adequate to model spatially homogenous media. The equivalent permeability of the medium is determined. Some elementary examples are worked out in two and three dimensions. Paradoxical flow patterns are obtained with back flow even with local resurgences. Unsteady problems are presently studied. (1) Adler, P.M. <span class="hlt">Porous</span> media. Geometry and transport. Butterworth-Heinemann, Stoneham, Ma, 1992.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/416137','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/416137"><span id="translatedtitle"><span class="hlt">Porous</span> silicon gettering</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Tsuo, Y.S.; Menna, P.; Pitts, J.R.</p> <p>1996-05-01</p> <p>The authors have studied a novel extrinsic gettering method that uses the large surface areas produced by a <span class="hlt">porous</span>-silicon etch as gettering sites. The annealing step of the gettering used a high-flux solar furnace. They found that a high density of photons during annealing enhanced the impurity diffusion to the gettering sites. The authors used metallurgical-grade Si (MG-Si) prepared by directional solidification casing as the starting material. They propose to use <span class="hlt">porous</span>-silicon-gettered MG-Si as a low-cost epitaxial substrate for polycrystalline silicon thin-film growth.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://ntrs.nasa.gov/search.jsp?R=19910000511&hterms=porous+membrane&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3Dporous%2Bmembrane','NASA-TRS'); return false;" href="http://ntrs.nasa.gov/search.jsp?R=19910000511&hterms=porous+membrane&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3Dporous%2Bmembrane"><span id="translatedtitle">Chemically Layered <span class="hlt">Porous</span> Solids</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Koontz, Steve</p> <p>1991-01-01</p> <p>Aerogels and other <span class="hlt">porous</span> solids in which surfaces of pores have chemical properties varying with depth below macroscopic surfaces prepared by sequences of chemical treatments. <span class="hlt">Porous</span> glass or silica bead treated to make two depth zones having different chemical properties. Beads dropped along tube filled with flowing gas containing atomic oxygen, generated in microwave discharge. General class of materials treatable include oxides of aluminum, silicon, zirconium, tin, titanium, and nickel, and mixtures of these oxides. Potential uses of treated materials include chromatographic separations, membrane separations, controlled releases of chemicals, and catalysis.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1289998','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1289998"><span id="translatedtitle"><span class="hlt">Porous</span> block nanofiber composite filters</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Ginley, David S.; Curtis, Calvin J.; Miedaner, Alexander; Weiss, Alan J.; Paddock, Arnold</p> <p>2016-08-09</p> <p><span class="hlt">Porous</span> block nano-fiber composite (110), a filtration system (10) and methods of using the same are disclosed. An exemplary <span class="hlt">porous</span> block nano-fiber composite (110) includes a <span class="hlt">porous</span> block (100) having one or more pores (200). The <span class="hlt">porous</span> block nano-fiber composite (110) also includes a plurality of inorganic nano-fibers (211) formed within at least one of the pores (200).</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3796997','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3796997"><span id="translatedtitle"><span class="hlt">Porous</span> metal for orthopedics implants</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Matassi, Fabrizio; Botti, Alessandra; Sirleo, Luigi; Carulli, Christian; Innocenti, Massimo</p> <p>2013-01-01</p> <p>Summary <span class="hlt">Porous</span> metal has been introduced to obtain biological fixation and improve longevity of orthopedic implants. The new generation of <span class="hlt">porous</span> metal has intriguing characteristics that allows bone healing and high osteointegration of the metallic implants. This article gives an overview about biomaterials properties of the contemporary class of highly <span class="hlt">porous</span> metals and about the clinical use in orthopaedic surgery. PMID:24133527</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23416226','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23416226"><span id="translatedtitle">Radioactive characterization of the main materials <span class="hlt">involved</span> in the titanium dioxide production process and their environmental radiological <span class="hlt">impact</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Mantero, J; Gazquez, M J; Bolivar, J P; Garcia-Tenorio, R; Vaca, F</p> <p>2013-06-01</p> <p>A study about the distribution of several radionuclides from the uranium and the thorium series radionuclides along the production process of a typical NORM industry devoted to the production of titanium dioxide has been performed. With this end the activity concentrations in raw materials, final product, co-products, and wastes of the production process have been determined by both gamma-ray and alpha-particle spectrometry. The main raw material used in the studied process (ilmenite) presents activity concentrations of around 300 Bq kg(-1) for Th-series radionuclides and 100 Bq kg(-1) for the U-series ones. These radionuclides in the industrial process are distributed in the different steps of the production process according mostly to the chemical behaviour of each radioelement, following different routes. As an example, most of the radium remains associated with the un-dissolved material waste, with activity concentrations around 3 kBq kg(-1) of (228)Ra and around 1 kBq kg(-1) of (226)Ra, while the final commercial products (TiO2 pigments and co-products) contain negligible amounts of radioactivity. The obtained results have allowed assessing the possible public radiological <span class="hlt">impact</span> associated with the use of the products and co-products obtained in this type of industry, as well as the environmental radiological <span class="hlt">impact</span> associated with the solid residues and liquid generated discharges.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014WRR....50.3933A','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014WRR....50.3933A"><span id="translatedtitle">Analysis of the <span class="hlt">impact</span> of surface layer properties on evaporation from <span class="hlt">porous</span> systems using column experiments and modified definition of characteristic length</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Assouline, Shmuel; Narkis, Kfir; Gherabli, Rivka; Lefort, Philippe; Prat, Marc</p> <p>2014-05-01</p> <p>The hydraulic properties of the layer at the vicinity of the soil surface have significant <span class="hlt">impact</span> on evaporation and could be harnessed to reduce water losses. The effect of the properties of the upper layer on the evolution of phase distribution during the evaporation process is first illustrated from three-dimensional pore network simulations. This effect is then studied from experiments carried out on soil columns under laboratory conditions. Comparisons between homogeneous columns packed with coarse (sand) and fine (sandy loam) materials and heterogeneous columns packed with layers of fine overlying coarse material and coarse overlying fine material of different thicknesses are performed to assess the <span class="hlt">impact</span> of upper layer properties on evaporation. Experiments are analyzed using the classical approach based on the numerical solution of Richards equation and semianalytical theoretical predictions. The theoretical analysis is based on the clear distinction between two drying regimes, namely, the capillary regime and the gravity-capillary regime, which are the prevailing regimes in our experiments. Simple relationships enabling to estimate the duration of stage 1 evaporation (S1) for both regimes are proposed. In particular, this led to defining the characteristic length for the gravity-capillary regime from the consideration of viscous effects at low water content differently from available expressions. The duration of S1, during which most of the water losses occur, for both the homogeneous and two-layer columns is presented and discussed. Finally, the <span class="hlt">impact</span> of liquid films and its consequences on the soil hydraulic conductivity function are briefly discussed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24629567','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24629567"><span id="translatedtitle">Attitudes toward hiring applicants with mental illness and criminal justice <span class="hlt">involvement</span>: the <span class="hlt">impact</span> of education and experience.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Batastini, Ashley B; Bolanos, Angelea D; Morgan, Robert D</p> <p>2014-01-01</p> <p>Individuals with mental health diagnoses, as well as those <span class="hlt">involved</span> in the criminal justice system, experience a number of barriers in the recovery and reintegration progress, including access to stable, prosocial employment opportunities. Employment for these populations is important for establishing financial security, reducing unstructured leisure time, increasing self-worth, and improving interpersonal skills. However, research has demonstrated that individuals with psychiatric and/or criminal backgrounds may experience stigmatizing attitudes from employers that impede their ability to find adequate work. This study aimed to evaluate stigmatizing beliefs toward hypothetical applicants who indicated a mental health history, a criminal history, or both, as well as the effectiveness of psychoeducation in reducing stigma. Participants consisted of 465 individuals recruited from a large university who completed a series of online questions about a given applicant. Results of this study varied somewhat across measures of employability, but were largely consistent with extant research suggesting that mental illness and criminal justice <span class="hlt">involvement</span> serve as deterrents when making hiring decisions. Overall, psychoeducation appeared to reduce stigma for hiring decisions when the applicant presented with a criminal history. Unfortunately, similar findings were not revealed when applicants presented with a psychiatric or a psychiatric and criminal history. Implications and limitations of these findings are presented, along with suggestions for future research.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/24629567','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/24629567"><span id="translatedtitle">Attitudes toward hiring applicants with mental illness and criminal justice <span class="hlt">involvement</span>: the <span class="hlt">impact</span> of education and experience.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Batastini, Ashley B; Bolanos, Angelea D; Morgan, Robert D</p> <p>2014-01-01</p> <p>Individuals with mental health diagnoses, as well as those <span class="hlt">involved</span> in the criminal justice system, experience a number of barriers in the recovery and reintegration progress, including access to stable, prosocial employment opportunities. Employment for these populations is important for establishing financial security, reducing unstructured leisure time, increasing self-worth, and improving interpersonal skills. However, research has demonstrated that individuals with psychiatric and/or criminal backgrounds may experience stigmatizing attitudes from employers that impede their ability to find adequate work. This study aimed to evaluate stigmatizing beliefs toward hypothetical applicants who indicated a mental health history, a criminal history, or both, as well as the effectiveness of psychoeducation in reducing stigma. Participants consisted of 465 individuals recruited from a large university who completed a series of online questions about a given applicant. Results of this study varied somewhat across measures of employability, but were largely consistent with extant research suggesting that mental illness and criminal justice <span class="hlt">involvement</span> serve as deterrents when making hiring decisions. Overall, psychoeducation appeared to reduce stigma for hiring decisions when the applicant presented with a criminal history. Unfortunately, similar findings were not revealed when applicants presented with a psychiatric or a psychiatric and criminal history. Implications and limitations of these findings are presented, along with suggestions for future research. PMID:24629567</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://ntrs.nasa.gov/search.jsp?R=19950065537&hterms=hydrophobic&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D10%26Ntt%3Dhydrophobic','NASA-TRS'); return false;" href="http://ntrs.nasa.gov/search.jsp?R=19950065537&hterms=hydrophobic&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D10%26Ntt%3Dhydrophobic"><span id="translatedtitle">Hydrophobic, <span class="hlt">Porous</span> Battery Boxes</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Bragg, Bobby J.; Casey, John E., Jr.</p> <p>1995-01-01</p> <p>Boxes made of <span class="hlt">porous</span>, hydrophobic polymers developed to contain aqueous potassium hydroxide electrolyte solutions of zinc/air batteries while allowing air to diffuse in as needed for operation. Used on other types of batteries for in-cabin use in which electrolytes aqueous and from which gases generated during operation must be vented without allowing electrolytes to leak out.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/6370269','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/biblio/6370269"><span id="translatedtitle"><span class="hlt">Porous</span> metallic bodies</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Landingham, R.L.</p> <p>1984-03-13</p> <p><span class="hlt">Porous</span> metallic bodies having a substantially uniform pore size of less than about 200 microns and a density of less than about 25 percent theoretical, as well as the method for making them, are disclosed. Group IIA, IIIB, IVB, VB, and rare earth metal hydrides a</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/22011916','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/22011916"><span id="translatedtitle">NUMERICAL MODELING OF THE 2009 <span class="hlt">IMPACT</span> EVENT ON JUPITER</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Pond, Jarrad W. T.; Palotai, Csaba; Gabriel, Travis; Harrington, Joseph; Rebeli, Noemi; Korycansky, Donald G.</p> <p>2012-02-01</p> <p>We have investigated the 2009 July <span class="hlt">impact</span> event on Jupiter using the ZEUS-MP 2 three-dimensional hydrodynamics code. We studied the <span class="hlt">impact</span> itself and the following plume development. Eight impactors were considered: 0.5 km and 1 km <span class="hlt">porous</span> ({rho} = 1.760 g cm{sup -3}) and non-<span class="hlt">porous</span> ({rho} = 2.700 g cm{sup -3}) basalt impactors, and 0.5 km and 1 km <span class="hlt">porous</span> ({rho} = 0.600 g cm{sup -3}) and non-<span class="hlt">porous</span> ({rho} = 0.917 g cm{sup -3}) ice impactors. The simulations consisted of these bolides colliding with Jupiter at an incident angle of {theta} = 69 Degree-Sign from the vertical and with an <span class="hlt">impact</span> velocity of v = 61.4 km s{sup -1}. Our simulations show the development of relatively larger, faster plumes created after <span class="hlt">impacts</span> <span class="hlt">involving</span> 1 km diameter bodies. Comparing simulations of the 2009 event with simulations of the Shoemaker-Levy 9 (SL9) events reveals a difference in plume development, with the higher incident angle of the 2009 <span class="hlt">impact</span> leading to a shallower terminal depth and a smaller and slower plume. We also studied the amount of dynamical chaos present in the simulations conducted at the 2009 incident angle. Compared to the chaos of the SL9 simulations, where {theta} Almost-Equal-To 45 Degree-Sign , we find no significant difference in chaos at the higher 2009 incident angle.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22122497','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22122497"><span id="translatedtitle">Processes <span class="hlt">involved</span> in client-nominated relationship building incidents: Client attachment, attachment to therapist, and session <span class="hlt">impact</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Janzen, Jennifer; Fitzpatrick, Marilyn; Drapeau, Martin</p> <p>2008-09-01</p> <p>Thirty volunteer clients of trainee therapists nominated an incident that was critical in the development of their therapeutic relationship. Clients completed the Client Attachment to Therapist Scale (CATS), the Experiences in Close Relationships Scale (ECRS), and the Session <span class="hlt">Impacts</span> Scale (SIS). Clients reported an increase in attachment security with their therapists, along with perceptions of support and relief and increasing exploration following the relationship building incident. While clients' avoidant attachment was unrelated to attachment to the therapist prior to the incidents, in subsequent sessions avoidance was related to a change in secure attachment to therapist. Finally, client attachment to therapist but not general attachment was significantly related to in-session exploration. Findings are discussed in light of attachment theory and convergence with findings from the field of social psychology. (PsycINFO Database Record (c) 2010 APA, all rights reserved).</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27184892','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27184892"><span id="translatedtitle">Clinical and economic <span class="hlt">impact</span> of a specific BCG vaccination program implemented in Prato, central Italy, <span class="hlt">involving</span> foreign newborns on hospitalizations.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Bellini, Irene; Nastasi, Antonino; Boccalini, Sara</p> <p>2016-09-01</p> <p>In Tuscany (Central Italy), the average annual notification rate of tuberculosis (TB) in the years 2007-2012 was 7.5-9.8 per 100,000 people, with the Local Health Unit of Prato (LHU4) showing the highest rate compared to the other regional area. Therefore, in order to reduce the burden of TB, foreign newborns in the LHU4 are being given the Bacillus Calmette-Guérin (BCG) vaccine since 2000. The aim of this study is to assess the <span class="hlt">impact</span> of BCG vaccination in Prato, in terms of TB-related hospitalizations and costs. The regional archive containing all TB-related discharges and costs in the period 2007-2014 was consulted. Data regarding foreigners living in the LHU4 who have been vaccinated since 2000 were compared with those living in the other Tuscan LHUs and never vaccinated. These populations were then disaggregated by a threshold age of 15 y. After calculating the standardized hospitalization rates, the expected number of hospitalizations for TB among unvaccinated adults (in both populations) was found to be similar in the LHU4 and the other LHUs (165 vs. 156). However, expected number of hospitalizations among children in the other Tuscan LHUs (67) was double that of the LHU4 (34). If the same vaccine had been administrated everywhere, each year 29 hospitalizations could have been avoided and EUR 343,525 saved. Overall, BCG vaccinations cost EUR 14,879 in the LHU4, but 69 hospitalizations were avoided and EUR 107,435 saved. The introduction of the BCG immunization program in the LHU4 of Prato has led to significant reductions in the clinical and economic <span class="hlt">impact</span> of TB.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3514091','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3514091"><span id="translatedtitle">Ratio of <span class="hlt">involved</span>/uninvolved immunoglobulin quantification by Hevylite™ assay: clinical and prognostic <span class="hlt">impact</span> in multiple myeloma</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p></p> <p>2012-01-01</p> <p>Background HevyLite™ is a new, recently developed method that facilitates separate quantification of the kappa- and lambda-bounded amounts of a given immunoglobulin (Ig). Using this method, we measured intact immunoglobulin (heavy/light chain; HLC) IgG-kappa, IgG-lambda, IgA-kappa, IgA-lambda individually, as well as their deriving ratios (HLCR) in a series of IgG or IgA multiple myeloma (MM) patients, to investigate and assess the contribution of these tests to disease evaluation. Patients and methods HevyLite™ assays were used in sera from 130 healthy individuals (HI) and 103 MM patients, at time of diagnosis. In patients, the level of paraprotein was IgG in 78 (52 IgG-kappa, 26 IgG-lambda) and IgΑ in 25 (13 IgΑ-kappa, 12 IgΑ-lambda). Durie-Salmon and International Staging System stages were evenly distributed. Symptomatic patients (n = 77) received treatment while asymptomatic ones (n = 26) were followed. Patients' median follow-up was at 32.6 months. HLCR was calculated with the <span class="hlt">involved</span> Ig (either G or A) as numerator. Results In HI, median IgG-kappa was 6.85, IgG-lambda 3.81, IgA-kappa 1.19 and IgA-lambda 0.98 g/L. The corresponding median <span class="hlt">involving</span> HLC values in MM patients were 25.8, 23.45, 28.9 and 36.4 g/L. HLC-IgG related to anemia, high serum free light chain ratio and extensive bone marrow infiltration, while high HLCR correlated with the same plus increased β2-microglobulin. In addition, increased HLCR and the presence of immunoparesis correlated with time to treatment. Patients with high HLCR had a significantly shorter survival (p = 0.022); HLCR retained its prognostic value in multivariate analysis. Conclusions HLC and HLCR quantify the precise amount of the <span class="hlt">involved</span> immunoglobulin more accurately than other methods; moreover, they carry prognostic information regarding survival in MM patients. PMID:23211046</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2010JNano...4d3513H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2010JNano...4d3513H"><span id="translatedtitle"><span class="hlt">Porous</span> silicon and <span class="hlt">porous</span> polymer substrates for optical chemical sensors</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Hajj-Hassan, Mohamad; Kim, Sung-Jin; Cheung, Maurice C.; Yao, Lei; Chodavarapu, Vamsy; Cartwright, Alexander</p> <p>2010-07-01</p> <p>Mesoporous materials, such as <span class="hlt">porous</span> silicon and <span class="hlt">porous</span> polymer gratings (Bragg structures), offer an attractive platform for the encapsulation of chemical and biological recognition elements. These materials include the advantages of high surface to volume ratio, biocompatibility, functionality with various recognition elements, and the ability to modify the material surface/volume properties and porosity. Two <span class="hlt">porous</span> structures were used for chemical and biological sensing: <span class="hlt">porous</span> silicon and <span class="hlt">porous</span> polymer photonic bandgap structures. Specifically, a new dry etching manufacturing technique employing xenon difluoride (XeF2) based etching was used to produce <span class="hlt">porous</span> silicon <span class="hlt">Porous</span> silicon continues to be extensively researched for various optical and electronic devices and applications in chemical and biological sensing are abundant. The dry etching technique to manufacture <span class="hlt">porous</span> silicon offers a simple and efficient alternative to the traditional wet electrochemical etching using hydrofluoric acid. This new <span class="hlt">porous</span> silicon material was characterized for its pore size and morphology using top and cross-sectional views from scanning electron microscopy. Its optical properties were determined by angular dependence of reflectance measurements. A new class of holographically ordered <span class="hlt">porous</span> polymer gratings that are an extension of holographic polymer dispersed liquid crystal (H-PDLC) structures. As an alternative structure and fabrication process, <span class="hlt">porous</span> polymer gratings that include a volatile solvent as the phase separation fluid was fabricated. <span class="hlt">Porous</span> silicon and <span class="hlt">porous</span> polymer materials were used as substrates to encapsulate gaseous oxygen (O2) responsive luminophores in their nanostructured pores. These substrate materials behave as optical interference filters that allow efficient and selective detection of the wavelengths of interest in optical sensors.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/244573','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/244573"><span id="translatedtitle">Small scale flow processes in aqueous heterogeneous <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Rashidi, M.; Dickenson, E.</p> <p>1996-04-01</p> <p>Small scale flow processes in aqueous heterogeneous <span class="hlt">porous</span> systems have been studied experimentally via novel nonintrusive fluorescence imaging techniques. The techniques <span class="hlt">involve</span> 3D visualization and quantification of flow fields within a refractive index-matched transparent <span class="hlt">porous</span> column. The refractive index-matching yields a transparent <span class="hlt">porous</span> medium, free from any scattering and refraction at the solid-liquid interfaces, as a result allowing direct optical probing at any point within the <span class="hlt">porous</span> system. By illuminating the <span class="hlt">porous</span> regions within the column with a planar sheet of laser beam, flow processes through the <span class="hlt">porous</span> medium can be observed microscopically, and qualitative and quantitative in-pore transport information can be obtained at a good resolution and a good accuracy. A CCD camera is used to record the fluorescent images at every vertical plane location while sweeping back and forth across the column. These digitized flow images are then analyzed and accumulated over a 3D volume within the column. Series of flow experiments in aqueous, refractive index-matched, <span class="hlt">porous</span> systems packed with natural mineral particles have been performed successfully in these laboratories.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/927603','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/927603"><span id="translatedtitle">SRNL <span class="hlt">POROUS</span> WALL GLASS MICROSPHERES</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Wicks, G; Leung Heung, L; Ray Schumacher, R</p> <p>2008-04-15</p> <p>The Savannah River National Laboratory (SRNL) has developed a new medium for storage of hydrogen and other gases. This <span class="hlt">involves</span> fabrication of thin, <span class="hlt">Porous</span> Walled, Hollow Glass Microspheres (PW-HGMs), with diameters generally in the range of 1 to several hundred microns. What is unique about the glass microballons is that porosity has been induced and controlled within the thin, one micron thick walls, on the scale of 10 to several thousand Angstroms. This porosity results in interesting properties including the ability to use these channels to fill the microballons with special absorbents and other materials, thus providing a contained environment even for reactive species. Gases can now enter the microspheres and be retained on the absorbents, resulting in solid-state and contained storage of even reactive species. Also, the porosity can be altered and controlled in various ways, and even used to filter mixed gas streams within a system. SRNL is <span class="hlt">involved</span> in about a half dozen different programs <span class="hlt">involving</span> these PW-HGMs and an overview of some of these activities and results emerging are presented.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2003PhDT........23Z','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2003PhDT........23Z"><span id="translatedtitle"><span class="hlt">Porous</span> bioactive materials</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Zhang, Kai</p> <p></p> <p>Bioactive materials chemically bond to tissues through the development of biologically active apatite. <span class="hlt">Porous</span> structures in biomaterials are designed to enhance bioactivity, grow artificial tissues and achieve better integration with host tissues in the body. The goal of this research is to design, fabricate and characterize novel <span class="hlt">porous</span> bioactive materials. 3D ordered macroporous bioactive glasses (3DOM-BGs, pore size: 200--1000 nm) were prepared using a sol-gel process and colloidal crystal templates. 3DOM-BGs are more bioactive and degradable than mesoporous (pore size <50 nm) sol-gel BGs in simulated body fluid (SBF). Apatite formation and 3DOM-BG degradation rates increased with the decrease of soaking ratio. Apatite induction time in SBF increased with 3DOM-BG calcination temperature (600--800°C). Apatite formation and 3DOMBG degradation were slightly enhanced for a phosphate containing composition. Large 3DOM-BG particles formed less apatite and degraded less completely as compared with small particles. An increase in macropore size slowed down 3DOM-BG degradation and apatite formation processes. After heating the converted apatite at a temperature higher than 700°C, highly crystalline hydroxyapatite and a minor tri-calcium phosphate phase formed. 3DOM-BGs have potential applications as bone/periodontal fillers, and drugs and biological factors delivery agents. Anchoring artificial soft tissues (e.g., cartilage) to native bone presents a challenge. <span class="hlt">Porous</span> polymer/bioactive glass composites are candidate materials for engineering artificial soft tissue/bone interfaces. <span class="hlt">Porous</span> composites consisting of polymer matrices (e.g., polysulfone, polylactide, and polyurethane) and bioactive glass particles were prepared by polymer phase separation techniques adapted to include ceramic particles. Composites (thickness: 200--500 mum) have asymmetric structures with dense top layers and <span class="hlt">porous</span> structures beneath. <span class="hlt">Porous</span> structures consist of large pores (>100 mum) in a</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li class="active"><span>10</span></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_10 --> <div id="page_11" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li class="active"><span>11</span></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="201"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/27087103','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/27087103"><span id="translatedtitle">Study investigating the <span class="hlt">impact</span> of pharmacist <span class="hlt">involvement</span> on the outcomes of diabetes medication therapy adherence program Malaysia.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lim, Phei Ching; Lim, Kelvin; Embee, Zubaidah Che; Hassali, Mohamed Azmi; Thiagarajan, Anuradha; Khan, Tahir Mehmood</p> <p>2016-03-01</p> <p><span class="hlt">Involvement</span> of pharmacists in improving medication adherence among diabetic patients is recognized globally. In Malaysian healthcare system, pharmacists are also operating health services i.e. Diabetes Medication Therapy Adherence Clinic (DMTAC). This study aimed to assess the clinical outcomes of patients managed by pharmacists (DMTAC), in a Malaysian hospital setting. This was an open labelled randomised study. Type 2 diabetes patients with HbA1c ≥8% were recruited and arbitrarily divided into the intervention group (usual care plus DMTAC) and the non-intervention group (usual care only). Those enrolled in the intervention group were scheduled for follow-up for eight consecutive visits. Improvements in lab results were compared longitudinally (pre and post analysis) between the groups. Data analysis was done using PASW 18® version. A total of 76 patients were enrolled, with 39 patients in the intervention group and 37 patients in the non-intervention group. Mean HbA1c (-0.90% vs. -0.08%, p=0.011) and fasting blood glucose levels (-3.45 mmol.l vs. +0.79 mmol/l, p=0.002) reduced significantly between the intervention group vs. non-intervention group. Total cholesterol and low-density lipoprotein cholesterol (LDL-C) were also significantly reduced in the intervention group (TC -0.34 mmol/l, p=0.018) (LDL -0.45 mmol/l, p=0.001). In conclusion, pharmacists managed DMTAC significantly improved glycaemic control and lipid profile of diabetic patients. PMID:27087103</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27087103','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27087103"><span id="translatedtitle">Study investigating the <span class="hlt">impact</span> of pharmacist <span class="hlt">involvement</span> on the outcomes of diabetes medication therapy adherence program Malaysia.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lim, Phei Ching; Lim, Kelvin; Embee, Zubaidah Che; Hassali, Mohamed Azmi; Thiagarajan, Anuradha; Khan, Tahir Mehmood</p> <p>2016-03-01</p> <p><span class="hlt">Involvement</span> of pharmacists in improving medication adherence among diabetic patients is recognized globally. In Malaysian healthcare system, pharmacists are also operating health services i.e. Diabetes Medication Therapy Adherence Clinic (DMTAC). This study aimed to assess the clinical outcomes of patients managed by pharmacists (DMTAC), in a Malaysian hospital setting. This was an open labelled randomised study. Type 2 diabetes patients with HbA1c ≥8% were recruited and arbitrarily divided into the intervention group (usual care plus DMTAC) and the non-intervention group (usual care only). Those enrolled in the intervention group were scheduled for follow-up for eight consecutive visits. Improvements in lab results were compared longitudinally (pre and post analysis) between the groups. Data analysis was done using PASW 18® version. A total of 76 patients were enrolled, with 39 patients in the intervention group and 37 patients in the non-intervention group. Mean HbA1c (-0.90% vs. -0.08%, p=0.011) and fasting blood glucose levels (-3.45 mmol.l vs. +0.79 mmol/l, p=0.002) reduced significantly between the intervention group vs. non-intervention group. Total cholesterol and low-density lipoprotein cholesterol (LDL-C) were also significantly reduced in the intervention group (TC -0.34 mmol/l, p=0.018) (LDL -0.45 mmol/l, p=0.001). In conclusion, pharmacists managed DMTAC significantly improved glycaemic control and lipid profile of diabetic patients.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/22056354','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/22056354"><span id="translatedtitle">The <span class="hlt">Impact</span> of Extent and Location of Mediastinal Lymph Node <span class="hlt">Involvement</span> on Survival in Stage III Non-Small Cell Lung Cancer Patients Treated With Definitive Radiotherapy</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Fernandes, Annemarie T.; Mitra, Nandita; Xanthopoulos, Eric; Evans, Tracey; Stevenson, James; Langer, Corey; Kucharczuk, John C.; Lin, Lilie; Rengan, Ramesh</p> <p>2012-05-01</p> <p>Purpose: Several surgical series have identified subcarinal, contralateral, and multilevel nodal <span class="hlt">involvement</span> as predictors of poor overall survival in patients with Stage III non-small-cell lung cancer (NSCLC) treated with definitive resection. This retrospective study evaluates the <span class="hlt">impact</span> of extent and location of mediastinal lymph node (LN) <span class="hlt">involvement</span> on survival in patients with Stage III NSCLC treated with definitive radiotherapy. Methods and Materials: We analyzed 106 consecutive patients with T1-4 N2-3 Stage III NSCLC treated with definitive radiotherapy at University of Pennsylvania between January 2003 and February 2009. For this analysis, mediastinal LN stations were divided into four mutually exclusive groups: supraclavicular, ipsilateral mediastinum, contralateral mediastinum, and subcarinal. Patients' conditions were then analyzed according to the extent of <span class="hlt">involvement</span> and location of mediastinal LN stations. Results: The majority (88%) of patients received sequential or concurrent chemotherapy. The median follow-up time for survivors was 32.6 months. By multivariable Cox modeling, chemotherapy use (hazard ratio [HR]: 0.21 [95% confidence interval (CI): 0.07-0.63]) was associated with improved overall survival. Increasing primary tumor [18F]-fluoro-2-deoxy-glucose avidity (HR: 1.11 [CI: 1.06-1.19]), and subcarinal <span class="hlt">involvement</span> (HR: 2.29 [CI: 1.11-4.73]) were significant negative predictors of overall survival. On univariate analysis, contralateral nodal <span class="hlt">involvement</span> (HR: 0.70 [CI: 0.33-1.47]), supraclavicular nodal <span class="hlt">involvement</span> (HR: 0.78 [CI: 0.38-1.67]), multilevel nodal <span class="hlt">involvement</span> (HR: 0.97 [CI: 0.58-1.61]), and tumor size (HR: 1.04 [CI: 0.94-1.14]) did not predict for overall survival. Patients with subcarinal <span class="hlt">involvement</span> also had lower rates of 2-year nodal control (51.2% vs. 74.9%, p = 0.047) and 2-year distant control (28.4% vs. 61.2%, p = 0.043). Conclusions: These data suggest that the factors that determine oncologic outcome in Stage III NSCLC</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20100011118','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20100011118"><span id="translatedtitle">Strong, Lightweight, <span class="hlt">Porous</span> Materials</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Leventis, Nicholas; Meador, Mary Ann B.; Johnston, James C.; Fabrizio, Eve F.; Ilhan, Ulvi</p> <p>2007-01-01</p> <p>A new class of strong, lightweight, <span class="hlt">porous</span> materials has been invented as an outgrowth of an effort to develop reinforced silica aerogels. The new material, called X-Aerogel is less hygroscopic, but no less <span class="hlt">porous</span> and of similar density to the corresponding unmodified aerogels. However, the property that sets X-Aerogels apart is their mechanical strength, which can be as much as two and a half orders of magnitude stronger that the unmodified aerogels. X-Aerogels are envisioned to be useful for making extremely lightweight, thermally insulating, structural components, but they may also have applications as electrical insulators, components of laminates, catalyst supports, templates for electrode materials, fuel-cell components, and filter membranes.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/874843','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/874843"><span id="translatedtitle"><span class="hlt">Porous</span> polymer media</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Shepodd, Timothy J.</p> <p>2002-01-01</p> <p>Highly crosslinked monolithic <span class="hlt">porous</span> polymer materials for chromatographic applications. By using solvent compositions that provide not only for polymerization of acrylate monomers in such a fashion that a <span class="hlt">porous</span> polymer network is formed prior to phase separation but also for exchanging the polymerization solvent for a running buffer using electroosmotic flow, the need for high pressure purging is eliminated. The polymer materials have been shown to be an effective capillary electrochromatographic separations medium at lower field strengths than conventional polymer media. Further, because of their highly crosslinked nature these polymer materials are structurally stable in a wide range of organic and aqueous solvents and over a pH range of 2-12.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/864745','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/864745"><span id="translatedtitle"><span class="hlt">Porous</span> electrode preparation method</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Arons, Richard M.; Dusek, Joseph T.</p> <p>1983-01-01</p> <p>A <span class="hlt">porous</span> sintered plaque is provided with a bimodal porosity that is especially well suited for use as an electrode within a molten carbonate fuel cell. The coarse porosity is sufficient for admitting gases into contact with the reaction surfaces while the fine porosity is wetted with and retains molten electrolyte on the reaction sites. The electrode structure is prepared by providing a very fine powder of such as nickel oxide and blending the powder with a suitable decomposable binder to form a solid mass. The mass is comminuted into agglomerate size particles substantially larger than the fine oxide particles and formed into a cohesive compact for subsequent sintering. Sintering is carried out at sufficient conditions to bind the agglomerates together into a <span class="hlt">porous</span> structure having both coarse and fine porosity. Where lithiated nickel oxide cathodes are prepared, the sintering conditions can be moderate enough to retain substantial quantities of lithium within the electrode for adequate conductivity.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/7008502','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/biblio/7008502"><span id="translatedtitle"><span class="hlt">Porous</span> electrode preparation method</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Arons, R.M.; Dusek, J.T.</p> <p>1983-10-18</p> <p>A <span class="hlt">porous</span> sintered plaque is provided with a bimodal porosity that is especially well suited for use as an electrode within a molten carbonate fuel cell. The coarse porosity is sufficient for admitting gases into contact with the reaction surfaces while the fine porosity is wetted with and retains molten electrolyte on the reaction sites. The electrode structure is prepared by providing a very fine powder of such as nickel oxide and blending the powder with a suitable decomposable binder to form a solid mass. The mass is comminuted into agglomerate size particles substantially larger than the fine oxide particles and formed into a cohesive compact for subsequent sintering. Sintering is carried out at sufficient conditions to bind the agglomerates together into a <span class="hlt">porous</span> structure having both coarse and fine porosity. Where lithiated nickel oxide cathodes are prepared, the sintering conditions can be moderate enough to retain substantial quantities of lithium within the electrode for adequate conductivity. 2 figs.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1996APS..OFM..CG01P','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1996APS..OFM..CG01P"><span id="translatedtitle">The Study of <span class="hlt">Porous</span> Media with AC Electrokinetics</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Pengra, David B.; Wong, Po-Zen</p> <p>1996-11-01</p> <p>Electrokinetic phenomena, which <span class="hlt">involve</span> the coupling of fluid and electric currents, are present in many <span class="hlt">porous</span> media systems. They arise from the presence of a space charge layer at the fluid/solid interface, and depend on characteristics of the interface and properties of the <span class="hlt">porous</span> material. Although understood for years, electrokinetic phenomena have been typically too weak to use as an experimental probe of such systems. Recently we have shown that modern instrumentation, based on AC excitations, can be used to measure electrokinetic response in <span class="hlt">porous</span> rock. From the measurements we derive the permeability of the rock exactly, and study other physicochemical properties. We review electrokinetic theory, describe our results for <span class="hlt">porous</span> rock, and discuss present research using the AC techniques. Research supported by the Gas Research Institute, Contract 5090-260-1953, and National Science Foundation Grant DMR-9405672.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/377002','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/377002"><span id="translatedtitle">Determination of the heat transfer coefficients in <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Kim, L.V.</p> <p>1994-06-01</p> <p>The process of transpiration cooling is considered. Methods are suggested for estimating the volumetric coefficient of heat transfer with the use of a two-temperature model and the surface heat transfer coefficient at entry into a <span class="hlt">porous</span> wall. The development of new technology under conditions of increasing heat loads puts the search for effective methods of heat transfer enhancement in the forefront of theoretical investigations. One of the promising trends in the solution of this problem is the use of <span class="hlt">porous</span> materials (PM) in the elements of power units. For thermal protection against convective or radiative heat fluxes, the method of transpiration cooling is successfully used. The mechanism operative in the thermal protection <span class="hlt">involves</span> the injection of a coolant through a <span class="hlt">porous</span> medium to produce a screen over the contour of a body in a flow for removing heat energy from the skeleton of the <span class="hlt">porous</span> material.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26667637','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26667637"><span id="translatedtitle">Complications after Total <span class="hlt">Porous</span> Implant Ear Reconstruction and Their Management.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lewin, Sheryl</p> <p>2015-12-01</p> <p>Microtia reconstruction using <span class="hlt">porous</span> polyethylene implants has become an established alternative to autologous costal cartilage techniques. Few surgeons are trained in <span class="hlt">porous</span> implant ear reconstruction (PIER), leading to a relative lack of understanding of the nuances of this type of surgery. The risks of exposure, infection, and fracture of the implant have further discouraged surgeons from performing PIERs. Meticulous technique and proper management of complications are critical to the success of surgeries <span class="hlt">involving</span> <span class="hlt">porous</span> implants (Medpor, Su-Por). There are a limited number of articles in the literature that report the management of complications of <span class="hlt">porous</span> implant auricular reconstruction. The purpose of this work is to present a comprehensive review of the management of complications with PIER based on over 10 years of experience with this surgical technique. PMID:26667637</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009PhDT........12O','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009PhDT........12O"><span id="translatedtitle">Amplified detection of protease activity using <span class="hlt">porous</span> silicon nanostructures</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Orosco, Manuel</p> <p></p> <p>This dissertation will focus on harnessing the optical properties of <span class="hlt">porous</span> silicon to sense protease activity. Electrochemical etching of polished silicon wafers produces <span class="hlt">porous</span> silicon with unique optical properties such as Fabry-Perot fringes or a dielectric mirror reflecting specific wavelengths. <span class="hlt">Porous</span> silicon optical transducers are coupled to a biochemical reaction (protease activity) and optically measured in a label-free manner. The first chapter is an introductory chapter discussing the current methods of detecting protease activity. Also discussed is the use of <span class="hlt">porous</span> silicon for label-free sensing. The second chapter discusses the use of thin protein layers that are spin coated on the surface of a <span class="hlt">porous</span> silicon film and excluded from the <span class="hlt">porous</span> matrix based on size. When active proteases are introduced to the protein layer, small peptide fragments are generated, causing a change in refractive index from low to high. This can be used as a tool to monitor protease activity and amplify the signal to the naked eye. To extend on the second chapter, a double layered <span class="hlt">porous</span> silicon film with the first layer have large pores and the second layer etched below having small pores was used for sensing protease activity. Proteases are adsorbed into the first layer and introduction of whole protein substrate produces small peptide fragments that can enter the second layer (changing the effective optical thickness). The fourth chapter describes a method of using luminescent transducers coupled to protein films. An "on-off" sensor using protein coated luminescent <span class="hlt">porous</span> silicon was used to detect a decrease in the intensity of luminescence due to degradation of the protein film. An "off-on" sensor <span class="hlt">involved</span> a fluorescent dye housed in the <span class="hlt">porous</span> film and capped with a protein coating. The release of the dye is caused by the action of a protease causing an increase in fluorescent intensity from the dye.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26023142','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26023142"><span id="translatedtitle"><span class="hlt">Porous</span> materials. Function-led design of new <span class="hlt">porous</span> materials.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Slater, Anna G; Cooper, Andrew I</p> <p>2015-05-29</p> <p><span class="hlt">Porous</span> solids are important as membranes, adsorbents, catalysts, and in other chemical applications. But for these materials to find greater use at an industrial scale, it is necessary to optimize multiple functions in addition to pore structure and surface area, such as stability, sorption kinetics, processability, mechanical properties, and thermal properties. Several different classes of <span class="hlt">porous</span> solids exist, and there is no one-size-fits-all solution; it can therefore be challenging to choose the right type of <span class="hlt">porous</span> material for a given job. Computational prediction of structure and properties has growing potential to complement experiment to identify the best <span class="hlt">porous</span> materials for specific applications.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/878217','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/878217"><span id="translatedtitle">Simulation of penetration into <span class="hlt">porous</span> geologic media</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Vorobiev, O Y; Liu, B T; Lomov, I N; Antoun, T</p> <p>2005-05-31</p> <p>We present a computational study on the penetration of steel projectiles into <span class="hlt">porous</span> geologic materials. The purpose of the study is to extend the range of applicability of a recently developed constitutive model to simulations <span class="hlt">involving</span> projectile penetration into geologic media. The constitutive model is non-linear, thermodynamically consistent, and properly invariant under superposed rigid body motions. The equations are valid for large deformations and they are hyperelastic in the sense that the stress tensor is related to a derivative of the Helmholtz free energy. The model uses the mathematical structure of plasticity theory to capture the basic features of the mechanical response of geological materials including the effects of bulking, yielding, damage, <span class="hlt">porous</span> compaction and loading rate on the material response. The new constitutive model has been successfully used to simulate static laboratory tests under a wide range of triaxial loading conditions, and dynamic spherical wave propagation tests in both dry and saturated geologic media.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3600995','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3600995"><span id="translatedtitle"><span class="hlt">Porous</span> microsphere and its applications</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Cai, Yunpeng; Chen, Yinghui; Hong, Xiaoyun; Liu, Zhenguo; Yuan, Weien</p> <p>2013-01-01</p> <p><span class="hlt">Porous</span> microspheres have drawn great attention in the last two decades for their potential applications in many fields, such as carriers for drugs, absorption and desorption of substances, pulmonary drug delivery, and tissue regeneration. The application of <span class="hlt">porous</span> microspheres has become a feasible way to address existing problems. In this essay, we give a brief introduction of the <span class="hlt">porous</span> microsphere, its characteristics, preparation methods, applications, and a brief summary of existing problems and research tendencies. PMID:23515359</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/6730037','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/6730037"><span id="translatedtitle">Natural convection in <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Prasad, V.; Hussain, N.A.</p> <p>1986-01-01</p> <p>This book presents the papers given at a conference on free convection in <span class="hlt">porous</span> materials. Topics considered at the conference included heat transfer, nonlinear temperature profiles and magnetic fields, boundary conditions, concentrated heat sources in stratified <span class="hlt">porous</span> media, free convective flow in a cavity, heat flux, laminar mixed convection flow, and the onset of convection in a <span class="hlt">porous</span> medium with internal heat generation and downward flow.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4377735','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4377735"><span id="translatedtitle">The <span class="hlt">impact</span> of patients’ <span class="hlt">involvement</span> in cooking on their mortality and morbidity: A 19-year follow-up of patients diagnosed with type 2 diabetes mellitus</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Siersma, Volkert; Køster-Rasmussen, Rasmus; Olivarius, Niels De Fine; Waldorff, Frans Boch</p> <p>2015-01-01</p> <p>Abstract Objective. This study explored the <span class="hlt">impact</span> of <span class="hlt">involvement</span> in cooking on long-term morbidity and mortality among patients newly diagnosed with type 2 diabetes mellitus (T2DM). Design and subjects. Data are from the population-based study Diabetes Care in General Practice. In baseline questionnaires, 1348 patients newly diagnosed with T2DM gave information on how frequently they consumed a warm main meal and how often they cooked it themselves. The selected patients were followed up for 19 years in the Danish National Patient Registry and the Danish Register of Causes of Death. Main outcome measures. This study analysed the association between <span class="hlt">involvement</span> in cooking and each of seven pre-specified outcomes was analysed in Cox regression models with stepwise adjustment for possible confounders and mediators. Results. 92% of the patients with T2DM consumed a warm main meal = five times per week. Among these, women who cooked for themselves less than once a week had a higher risk of diabetes-related deaths (HR 1.86 [95% CI 1.03–3.35], p = 0.039) and stroke (HR 2.47 [95% CI 1.08–5.65], p = 0.033), after adjustment for confounders. For men, infrequent cooking was not related to increased risk for the outcomes investigated. Conclusions. In patients newly diagnosed with T2DM and with a regular intake of warm main meals, infrequent <span class="hlt">involvement</span> in cooking was associated with an increased risk of diabetes-related death and stroke for women, but not for men. General practitioners should pay special attention to managing diabetes treatment in female patients newly diagnosed with T2DM who report infrequent <span class="hlt">involvement</span> in cooking. PMID:25592166</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19960009264','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19960009264"><span id="translatedtitle">Selective formation of <span class="hlt">porous</span> silicon</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Fathauer, Robert W. (Inventor); Jones, Eric W. (Inventor)</p> <p>1993-01-01</p> <p>A pattern of <span class="hlt">porous</span> silicon is produced in the surface of a silicon substrate by forming a pattern of crystal defects in said surface, preferably by applying an ion milling beam through openings in a photoresist layer to the surface, and then exposing said surface to a stain etchant, such as HF:HNO3:H2O. The defected crystal will preferentially etch to form a pattern of <span class="hlt">porous</span> silicon. When the amorphous content of the <span class="hlt">porous</span> silicon exceeds 70 percent, the <span class="hlt">porous</span> silicon pattern emits visible light at room temperature.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19940011487','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19940011487"><span id="translatedtitle">Selective formation of <span class="hlt">porous</span> silicon</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Fathauer, Jones (Inventor)</p> <p>1993-01-01</p> <p>A pattern of <span class="hlt">porous</span> silicon is produced in the surface of a silicon substrate by forming a pattern of crystal defects in said surface, preferably by applying an ion milling beam through openings in a photoresist layer to the surface, and then exposing said surface to a stain etchant, such as HF:HNO3:H20. The defected crystal will preferentially etch to form a pattern of <span class="hlt">porous</span> silicon. When the amorphous content of the <span class="hlt">porous</span> silicon exceeds 70 percent, the <span class="hlt">porous</span> silicon pattern emits visible light at room temperature.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/22122787','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/22122787"><span id="translatedtitle">Amorphization and reduction of thermal conductivity in <span class="hlt">porous</span> silicon by irradiation with swift heavy ions</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Newby, Pascal J.; Canut, Bruno; Bluet, Jean-Marie; Lysenko, Vladimir; Gomes, Severine; Isaiev, Mykola; Burbelo, Roman; Chantrenne, Patrice; Frechette, Luc G.</p> <p>2013-07-07</p> <p>In this article, we demonstrate that the thermal conductivity of nanostructured <span class="hlt">porous</span> silicon is reduced by amorphization and also that this amorphous phase in <span class="hlt">porous</span> silicon can be created by swift (high-energy) heavy ion irradiation. <span class="hlt">Porous</span> silicon samples with 41%-75% porosity are irradiated with 110 MeV uranium ions at six different fluences. Structural characterisation by micro-Raman spectroscopy and SEM imaging show that swift heavy ion irradiation causes the creation of an amorphous phase in <span class="hlt">porous</span> Si but without suppressing its <span class="hlt">porous</span> structure. We demonstrate that the amorphization of <span class="hlt">porous</span> silicon is caused by electronic-regime interactions, which is the first time such an effect is obtained in crystalline silicon with single-ion species. Furthermore, the <span class="hlt">impact</span> on the thermal conductivity of <span class="hlt">porous</span> silicon is studied by micro-Raman spectroscopy and scanning thermal microscopy. The creation of an amorphous phase in <span class="hlt">porous</span> silicon leads to a reduction of its thermal conductivity, up to a factor of 3 compared to the non-irradiated sample. Therefore, this technique could be used to enhance the thermal insulation properties of <span class="hlt">porous</span> Si. Finally, we show that this treatment can be combined with pre-oxidation at 300 Degree-Sign C, which is known to lower the thermal conductivity of <span class="hlt">porous</span> Si, in order to obtain an even greater reduction.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/15348161','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/15348161"><span id="translatedtitle">Characterization of <span class="hlt">porous</span> hydroxyapatite.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Hing, K A; Best, S M; Bonfield, W</p> <p>1999-03-01</p> <p>Hydroxyapatite has been considered for use in the repair of osseous defects for the last 20 years. Recent developments have led to interest in the potential of <span class="hlt">porous</span> hydroxyapatite as a synthetic bone graft. However, despite considerable activity in this field, regarding assessment of the biological response to such materials, the basic materials characterization is often inadequate. This paper documents the characterization of the chemical composition, mechanical integrity, macro- and microstructure of a <span class="hlt">porous</span> hydroxyapatite, Endobon (E. Merck GmbH), intended for the bone-graft market. Specimens possesed a range of apparent densities from 0.35 to 1.44 g cm(-3). Chemical analysis demonstrated that the natural apatite precursor of Endobon was not converted to pure hydroxyapatite, but retained many of the ionic substituents found in bone mineral, notably carbonate, sodium and magnesium ions. Investigation of the microstructure illustrated that the struts of the material were not fully dense, but had retained some traces of the network of osteocyte lacunae. Macrostructural analysis demonstrated the complex inter-relationship between the structural features of an open pore structure. Both pore size and connectivity were found to be inversely dependent on apparent density. Furthermore, measurement of pore aspect ratio and orientation demonstrated a relationship between apparent density and the degree of macrostructural anisotropy within the specimens, while, it was also noted that pore connectivity was sensitive to anisotropy. Compression testing demonstrated the effect of apparent density and macrostructural anisotropy on the mechanical properties. An increase in apparent density from 0.38 to 1.25 g cm(-3) resulted in increases in ultimate compressive stress and compressive modulus of 1 to 11 MPa and 0.2 to 3.1 GPa, respectively. Furthermore, anisotropic high density (> 0.9 g cm(-3)) specimens were found to possess lower compressive moduli than isotropic specimens</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li class="active"><span>11</span></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_11 --> <div id="page_12" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li class="active"><span>12</span></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="221"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20080012236','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20080012236"><span id="translatedtitle">Crosslinked, <span class="hlt">porous</span>, polyacrylate beads</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Rembaum, Alan (Inventor); Yen, Shiao-Ping S. (Inventor); Dreyer, William J. (Inventor)</p> <p>1977-01-01</p> <p>Uniformly-shaped, <span class="hlt">porous</span>, round beads are prepared by the co-polymerization of an acrylic monomer and a cross-linking agent in the presence of 0.05 to 5% by weight of an aqueous soluble polymer such as polyethylene oxide. Cross-linking proceeds at high temperature above about 50.degree. C or at a lower temperature with irradiation. Beads of even shape and even size distribution of less than 2 micron diameter are formed. The beads will find use as adsorbents in chromatography and as markers for studies of cell surface receptors.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20080006886','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20080006886"><span id="translatedtitle">Crosslinked, <span class="hlt">porous</span>, polyacrylate beads</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Rembaum, Alan (Inventor); Yen, Shiao-Ping Siao (Inventor); Dreyer, William J. (Inventor)</p> <p>1976-01-01</p> <p>Uniformly-shaped, <span class="hlt">porous</span>, round beads are prepared by the co-polymerization of an acrylic monomer and a cross-linking agent in the presence of 0.05 to 5% by weight of an aqueous soluble polymer such as polyethylene oxide. Cross-linking proceeds at high temperature above about 50.degree.C or at a lower temperature with irradiation. Beads of even shape and even size distribution of less than 2 micron diameter are formed. The beads will find use as adsorbents in chromatography and as markers for studies of cell surface receptors.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20080006880','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20080006880"><span id="translatedtitle">Small, <span class="hlt">porous</span> polyacrylate beads</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Rembaum, Alan (Inventor); Yen, Shiao-Ping Siao (Inventor); Dreyer, William J. (Inventor)</p> <p>1976-01-01</p> <p>Uniformly-shaped, <span class="hlt">porous</span>, round beads are prepared by the co-polymerization of an acrylic monomer and a cross-linking agent in the presence of 0.05 to 5% by weight of an aqueous soluble polymer such as polyethylene oxide. Cross-linking proceeds at high temperature above about 50.degree.C or at a lower temperature with irradiation. Beads of even shape and even size distribution of less than 2 micron diameter are formed. The beads will find use as adsorbents in chromatography and as markers for studies of cell surface receptors.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22869206','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22869206"><span id="translatedtitle">The Citizenship Project part II: <span class="hlt">impact</span> of a citizenship intervention on clinical and community outcomes for persons with mental illness and criminal justice <span class="hlt">involvement</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Clayton, Ashley; O'Connell, Maria J; Bellamy, Chyrell; Benedict, Patricia; Rowe, Michael</p> <p>2013-03-01</p> <p>This study assessed the effectiveness of an intervention based on a theoretical framework of citizenship on reducing psychiatric symptoms, alcohol use, and drug use, and increasing quality of life for persons with serious mental illness (SMI) and criminal justice <span class="hlt">involvement</span>. One-hundred fourteen adults with SMI and a history of criminal justice <span class="hlt">involvement</span> participated in a 2 × 3 longitudinal randomized controlled trial of a four-month citizenship intervention versus usual services. Linear mixed model analyses were used to assess the intervention's <span class="hlt">impact</span> on quality of life, symptoms, and substance use. After controlling for baseline covariates, participants in the experimental condition reported significantly increased quality of life, greater satisfaction with and amount of activity, higher satisfaction with work, and reduced alcohol and drug use over time. However, individuals in the experimental condition also reported increased anxiety/depression and agitation at 6 months (but not 12 months) and significantly increased negative symptoms at 12 months. Findings suggest that community-oriented, citizenship interventions for persons with SMI and criminal justice histories may facilitate improved clinical and community outcomes in some domains, but some negative clinical findings suggest the need for post-intervention support for intervention participants. Implications for practice and future research are discussed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012PSST...21e5018L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012PSST...21e5018L"><span id="translatedtitle">Theoretical vibrational-excitation cross sections and rate coefficients for electron-<span class="hlt">impact</span> resonant collisions <span class="hlt">involving</span> rovibrationally excited N2 and NO molecules</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Laporta, V.; Celiberto, R.; Wadehra, J. M.</p> <p>2012-10-01</p> <p>Electron-<span class="hlt">impact</span> vibrational-excitation cross sections, <span class="hlt">involving</span> rovibrationally excited N2 and NO molecules, are calculated for collisions occurring through the nitrogen resonant electronic state N_2^-(X\\,^2\\!\\Pi_g) , and the three resonant states of nitric oxide NO-(3Σ-, 1Δ, 1Σ+). Complete sets of cross sections have been obtained for all possible transitions <span class="hlt">involving</span> 68 vibrational levels of N_2(X\\,{}^1\\!\\Sigma_g^+) and 55 levels of NO(X 2Π), for incident electron energy between 0.1 and 10 eV. In order to study the rotational motion in the resonant processes, cross sections have also been computed for rotationally elastic transitions characterized by the rotational quantum number J running from 0 to 150. The calculations are performed within the framework of the local complex potential model, using potential energies and widths optimized to reproduce the experimental cross sections available in the literature. Rate coefficients are calculated for transitions between all vibrational levels by assuming a Maxwellian electron energy distribution function in the temperature range from 0.1 to 100 eV. All numerical data are available at http://users.ba.cnr.it/imip/cscpal38/phys4entry/database.html</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1997ApPhA..65....5J','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1997ApPhA..65....5J"><span id="translatedtitle">Fullerene-doped <span class="hlt">porous</span> glasses</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Joshi, M. P.; Kukreja, L. M.; Rustagi, K. C.</p> <p></p> <p>We report the doping of C60 in <span class="hlt">porous</span> glass by diffusion in solution phase at room temperature. The presence of C60 in the doped <span class="hlt">porous</span> glass was confirmed spectroscopically. We also report the changes in optical absorption spectrum and intensity-dependent transmission of 30 ns laser pulses at 527 nm in these materials.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/865714','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/865714"><span id="translatedtitle"><span class="hlt">Porous</span> metallic bodies</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Landingham, Richard L.</p> <p>1985-01-01</p> <p><span class="hlt">Porous</span> metallic bodies having a substantially uniform pore size of less than about 200 microns and a density of less than about 25 percent theoretical, as well as the method for making them, are disclosed. Group IIA, IIIB, IVB, VB, and rare earth metal hydrides are heated in a confining container at a controlled rate to a temperature of about greater than the temperature at which the hydride decomposes. Hydrogen is removed from the container and the remaining metal is heated during a second stage to a temperature greater than the temperature at which it was previously heated but not greater than the temperature of 1/2 to 2/3 the temperature at which the metal melts at a controlled rate. The resulting <span class="hlt">porous</span> metallic body produced has a density less than about 25 percent theoretical and a pore size of less than about 200 microns. The metallic particles of the present invention have high inner surface area and possess minimum resistance to gas flow.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/23319518','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/23319518"><span id="translatedtitle">Wetting of <span class="hlt">Porous</span> Solids.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Patkar, Saket; Chaudhuri, Parag</p> <p>2013-01-10</p> <p>This paper presents a simple, three stage method to simulate the mechanics of wetting of <span class="hlt">porous</span> solid objects, like sponges and cloth, when they interact with a fluid. In the first stage, we model the absorption of fluid by the object when it comes in contact with the fluid. In the second stage, we model the transport of absorbed fluid inside the object, due to diffusion, as a flow in a deforming, unstructured mesh. The fluid diffuses within the object depending on saturation of its various parts and other body forces. Finally, in the third stage, over-saturated parts of the object shed extra fluid by dripping. The simulation model is motivated by the physics of imbibition of fluids into <span class="hlt">porous</span> solids in the presence of gravity. It is phenomenologically capable of simulating wicking and imbibition, dripping, surface flows over wet media, material weakening and volume expansion due to wetting. The model is inherently mass conserving and works for both thin 2D objects like cloth and for 3D volumetric objects like sponges. It is also designed to be computationally efficient and can be easily added to existing cloth, soft body and fluid simulation pipelines. PMID:23319518</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/23846102','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/23846102"><span id="translatedtitle">Wetting of <span class="hlt">porous</span> solids.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Patkar, Saket; Chaudhuri, Parag</p> <p>2013-09-01</p> <p>This paper presents a simple, three stage method to simulate the mechanics of wetting of <span class="hlt">porous</span> solid objects, like sponges and cloth, when they interact with a fluid. In the first stage, we model the absorption of fluid by the object when it comes in contact with the fluid. In the second stage, we model the transport of absorbed fluid inside the object, due to diffusion, as a flow in a deforming, unstructured mesh. The fluid diffuses within the object depending on saturation of its various parts and other body forces. Finally, in the third stage, oversaturated parts of the object shed extra fluid by dripping. The simulation model is motivated by the physics of imbibition of fluids into <span class="hlt">porous</span> solids in the presence of gravity. It is phenomenologically capable of simulating wicking and imbibition, dripping, surface flows over wet media, material weakening, and volume expansion due to wetting. The model is inherently mass conserving and works for both thin 2D objects like cloth and for 3D volumetric objects like sponges. It is also designed to be computationally efficient and can be easily added to existing cloth, soft body, and fluid simulation pipelines. PMID:23846102</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/22287819','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/22287819"><span id="translatedtitle">Analysis of the <span class="hlt">impact</span> of professional <span class="hlt">involvement</span> in evidence generation for the HTA Process, subproject "cochlear implants": methodology, results and recommendations.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Berrettini, S; Arslan, E; Baggiani, A; Burdo, S; Cassandro, E; Cuda, D; Filipo, R; Rossi, P Giorgi; Mancini, P; Martini, A; Quaranta, A; Quaranta, N; Turchetti, G; Forli, F</p> <p>2011-10-01</p> <p>The aim of Health Technology Assessment (HTA) is to provide decision-makers, distributors and recipients with information on the effectiveness, cost and <span class="hlt">impact</span> of health technologies. The present study constitutes a subproject within the wider project "Analysis of the <span class="hlt">impact</span> of professional <span class="hlt">involvement</span> in evidence generation for the HTA process", which is part of the strategic programme "Transfer of the results of the research in clinical practice and organisation of healthcare services", coordinated by Laziosanità - Agency of Public Healthcare of the Lazio Region and AgeNaS (National Agency for Regional Healthcare Services). The objectives of the present subproject (cochlear implants) are as follows: a) to produce a report regarding the health <span class="hlt">impact</span> of cochlear implants (CI) on their recipients, through a systematic review of literature and extensive selection of relative studies, combining the outcomes with metanalytical techniques. Output: report on the indications of usage in the groups of population for which benefits are controversial; b) to create a registry of patients using cochlear implants. The registry should contain a selection of anagraphic and clinical information relative to patient follow-up in order to assess factors associated with safety and <span class="hlt">impact</span> on cochlear implant users. This source of information is essential for future observational studies. This was divided into 4 phases: 1(st) phase: definition of key participants in the assessment process; 2(nd) phase: definition of methods and timing of "Aims" (definition of the objective); 3(rd) phase: definition of the methods and times of the "assessment process", 4(th) phase: production of the final report. From the analysis of systematic reviews and italian and international guidelines, the Working Group members approved recommendations on the following topics: results after CI in children in relation to age at implantation, bilateral CI in children, CI in deaf children with associated</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19780019129','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19780019129"><span id="translatedtitle">Application of <span class="hlt">porous</span> materials for laminar flow control</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Pearce, W. E.</p> <p>1978-01-01</p> <p>Fairly smooth <span class="hlt">porous</span> materials were elected for study Doweave; Fibermetal; Dynapore; and perforated titanium sheet. Factors examined include: surface smoothness; suction characteristics; porosity; surface <span class="hlt">impact</span> resistance; and strain compatibility. A laminar flow control suction glove arrangement was identified with material combinations compatible with thermal expansion and structural strain.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2001PhRvE..63b1508H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2001PhRvE..63b1508H"><span id="translatedtitle">Infiltration through <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Hwang, W.; Redner, S.</p> <p>2001-02-01</p> <p>We study the kinetics of infiltration in which contaminant particles, which are suspended in a flowing carrier fluid, penetrate a <span class="hlt">porous</span> medium. The progress of the ``invader'' particles is impeded by their trapping on active ``defender'' sites which are on the surfaces of the medium. As the defenders are used up, the invader penetrates further and ultimately breaks through. We study this process in the regime where the particles are much smaller than the pores so that the permeability change due to trapping is negligible. We develop a family of microscopic models of increasing realism to determine the propagation velocity of the invasion front, as well as the shapes of the invader and defender profiles. The predictions of our model agree qualitatively with experimental results on breakthrough times and the time dependence of the invader concentration at the output. Our results also provide practical guidelines for improving the design of deep bed filters in which infiltration is the primary separation mechanism.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/765956','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/765956"><span id="translatedtitle">Combustion in <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Dillon, J.</p> <p>1999-09-01</p> <p>A 2.8-liter tube-shaped combustion vessel was constructed to study flame propagation and quenching in <span class="hlt">porous</span> media. For this experiment, hydrogen-air flames propagating horizontally into abed of 6 mm diameter glass beads were studied. Measurements of pressure and temperature along the length of the tube were used to observe flame propagation of quenching. The critical hydrogen concentration for Hz-air mixtures was found to be 11.5%, corresponding to a critical Peclet number of Pe* = 37. This value is substantially less than the value of Pe* = 65 quoted in the literature, for example Babkin et al. (1991). It is hypothesized that buoyancy and a dependence of Pe on the Lewis number account for the discrepancy between these two results.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014AGUFM.B41L..04H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014AGUFM.B41L..04H"><span id="translatedtitle">Biogenic Cracks in <span class="hlt">Porous</span> Rock</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Hemmerle, A.; Hartung, J.; Hallatschek, O.; Goehring, L.; Herminghaus, S.</p> <p>2014-12-01</p> <p>Microorganisms growing on and inside <span class="hlt">porous</span> rock may fracture it by various processes. Some of the mechanisms of biofouling and bioweathering are today identified and partially understood but most emphasis is on chemical weathering, while mechanical contributions have been neglected. However, as demonstrated by the perseverance of a seed germinating and cracking up a concrete block, the turgor pressure of living organisms can be very significant. Here, we present results of a systematic study of the effects of the mechanical forces of growing microbial populations on the weathering of <span class="hlt">porous</span> media. We designed a model <span class="hlt">porous</span> medium made of glass beads held together by polydimethylsiloxane (PDMS), a curable polymer. The rheological properties of the <span class="hlt">porous</span> medium, whose shape and size are tunable, can be controlled by the ratio of crosslinker to base used in the PDMS (see Fig. 1). Glass and PDMS being inert to most chemicals, we are able to focus on the mechanical processes of biodeterioration, excluding any chemical weathering. Inspired by recent measurements of the high pressure (~0.5 Mpa) exerted by a growing population of yeasts trapped in a microfluidic device, we show that yeast cells can be cultured homogeneously within <span class="hlt">porous</span> medium until saturation of the <span class="hlt">porous</span> space. We investigate then the effects of such an inner pressure on the mechanical properties of the sample. Using the same model system, we study also the complex interplay between biofilms and <span class="hlt">porous</span> media. We focus in particular on the effects of pore size on the penetration of the biofilm within the <span class="hlt">porous</span> sample, and on the resulting deformations of the matrix, opening new perspectives into the understanding of life in complex geometry. Figure 1. Left : cell culture growing in a model <span class="hlt">porous</span> medium. The white spheres represent the grains, bonds are displayed in grey, and microbes in green. Right: microscopy picture of glass beads linked by PDMS bridges, scale bar: 100 μm.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/17729137','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/17729137"><span id="translatedtitle"><span class="hlt">Impact</span> of lowering the legal blood alcohol concentration limit to 0.03 on male, female and teenage drivers <span class="hlt">involved</span> alcohol-related crashes in Japan.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Desapriya, E; Shimizu, S; Pike, I; Subzwari, S; Scime, G</p> <p>2007-09-01</p> <p>In June of 2002, a revision to part of the Road Traffic Act drastically increased the penalties for drinking and driving offences in Japan. Most notably, the legal blood alcohol concentration (BAC) limit for driving was lowered from 0.05 mg/ml to 0.03 mg/ml. The rationale for the new lower BAC limit was predicated on the assumption that drinking drivers will comply with the new, lower limit by reducing the amount of alcohol they consume prior to driving, thereby lowering their risk of crash <span class="hlt">involvement</span>. This, in turn, would lead to fewer alcohol-related crashes. A key limitation of previous lower BAC evaluation research in determining the effectiveness of lower legal BAC limit policies is the assumption of population homogeneity in responding to the laws. The present analysis is unique in this perspective and focuses on the evaluation of the <span class="hlt">impact</span> of BAC limit reduction on different segments of the population. The chief objective of this research is to quantify the extent to which lowering the legal limit of BAC has reduced male, female and teenager <span class="hlt">involvement</span> in motor vehicle crashes in Japan since 2002. Most notably, the introduction of reduced BAC limit legislation resulted in a statistically significant decrease in the number of alcohol-impaired drivers on the road in Japan, indicating responsiveness to the legal change among adults and teenagers. In addition, this preliminary assessment appears to indicate that the implementation of 0.03 BAC laws and other associated activities are associated with statistically significant reductions in alcohol-<span class="hlt">involved</span> motor vehicle crashes. In comparison, the rates of total crashes showed no statistically significant decline nor increase in the period following the introduction of the BAC law, indicating that the lower BAC limit only had an effect on alcohol-related crashes in Japan. The evidence suggests that the lower BAC legal limit and perceived risk of detection are the two most important factors resulting in a</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20140001874','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20140001874"><span id="translatedtitle">Regeneratively Cooled <span class="hlt">Porous</span> Media Jacket</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Mungas, Greg (Inventor); Fisher, David J. (Inventor); London, Adam Pollok (Inventor); Fryer, Jack Merrill (Inventor)</p> <p>2013-01-01</p> <p>The fluid and heat transfer theory for regenerative cooling of a rocket combustion chamber with a <span class="hlt">porous</span> media coolant jacket is presented. This model is used to design a regeneratively cooled rocket or other high temperature engine cooling jacket. Cooling jackets comprising impermeable inner and outer walls, and <span class="hlt">porous</span> media channels are disclosed. Also disclosed are <span class="hlt">porous</span> media coolant jackets with additional structures designed to transfer heat directly from the inner wall to the outer wall, and structures designed to direct movement of the coolant fluid from the inner wall to the outer wall. Methods of making such jackets are also disclosed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1998PhDT.......108P','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1998PhDT.......108P"><span id="translatedtitle">Light emission from <span class="hlt">porous</span> silicon</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Penczek, John</p> <p></p> <p>The continuous evolution of silicon microelectronics has produced significant gains in electronic information processing. However, greater improvements in performance are expected by utilizing optoelectronic techniques. But these techniques have been severely limited in silicon- based optoelectronics due to the lack of an efficient silicon light emitter. The recent observation of efficient light emission from <span class="hlt">porous</span> silicon offer a promising opportunity to develop a suitable silicon light source that is compatible with silicon microelectronics. This dissertation examined the <span class="hlt">porous</span> silicon emission mechanism via photoluminescence, and by a novel device structure for <span class="hlt">porous</span> silicon emitters. The investigation first examined the correlation between <span class="hlt">porous</span> silicon formation conditions (and subsequent morphology) with the resulting photoluminescence properties. The quantum confinement theory for <span class="hlt">porous</span> silicon light emission contends that the morphology changes induced by the different formation conditions determine the optical properties of <span class="hlt">porous</span> silicon. The photoluminescence spectral shifts measured in this study, in conjunction with TEM analysis and published morphological data, lend support to this theory. However, the photoluminescence spectral broadening was attributed to electronic wavefunction coupling between adjacent silicon nanocrystals. An novel device structure was also investigated in an effort to improve current injection into the <span class="hlt">porous</span> silicon layer. The selective etching properties of <span class="hlt">porous</span> silicon were used to create a p-i-n structure with crystalline silicon contacts to the <span class="hlt">porous</span> silicon layer. The resulting device was found to have unique characteristics, with a negative differential resistance region and current-induced emission that spanned from 400 nm to 5500 nm. The negative differential resistance was correlated to resistive heating effects in the device. A numerical analysis of thermal emission spectra from silicon films, in addition to</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=control+AND+postural&pg=7&id=ED080564','ERIC'); return false;" href="http://eric.ed.gov/?q=control+AND+postural&pg=7&id=ED080564"><span id="translatedtitle">On <span class="hlt">Involvement</span>.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Greene, Michael B.</p> <p></p> <p><span class="hlt">Involvement</span> Ratings In Settings (IRIS), a multi-dimensional non-verbal scale of <span class="hlt">involvement</span> adaptable to a time-sampling method of data collection, was constructed with the aid of the videotapes of second-grade Follow Through classrooms made by CCEP. Scales were defined through observations of <span class="hlt">involved</span> and alienated behavior, and the IRIS was…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016EML....12...17J','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016EML....12...17J"><span id="translatedtitle">Fabrication and characterization of <span class="hlt">porous</span> silicon nanowires</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Jung, Daeyoon; Cho, Soo Gyeong; Moon, Taeho; Sohn, Honglae</p> <p>2016-01-01</p> <p>We report the synthesis of <span class="hlt">porous</span> silicon nanowires through the metalassisted chemical etching of <span class="hlt">porous</span> silicon in a solution of hydrofluoric acid and hydrogen peroxide. The morphology of <span class="hlt">porous</span> silicon nanowires was characterized by scanning electron microscopy and transmission electron microscopy. The etch rate of the <span class="hlt">porous</span> silicon nanowires was faster than that of silicon nanowires, but slower than that of <span class="hlt">porous</span> silicon. The <span class="hlt">porous</span> silicon nanowires distributed uniformly on the entire <span class="hlt">porous</span> silicon layer and the tips of the <span class="hlt">porous</span> silicon nanowires congregated together. The single crystalline and sponge-like <span class="hlt">porous</span> structure with the pore diameters of less than 5 nm was confirmed for the <span class="hlt">porous</span> silicon nanowires. [Figure not available: see fulltext.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/22475958','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/22475958"><span id="translatedtitle">Efficient visible-light photocatalytic performance of cuprous oxide <span class="hlt">porous</span> nanosheet arrays</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Li, Xianghua; Wang, Jianqiang; Cao, Minhua</p> <p>2015-10-15</p> <p>Graphical Abstract: We demonstrated a facile and efficient process for fabricating Cu{sub 2}O <span class="hlt">porous</span> nanosheet arrays on Cu mesh. Benefiting from the 1D array structure and <span class="hlt">porous</span> structure, the as-prepared Cu{sub 2}O sample exhibited significantly improved photocatalytic activity for methyl orange degradation under visible light irradiation. - Highlights: • Cu{sub 2}O <span class="hlt">porous</span> nanosheet arrays on Cu mesh were synthesized via the facile and efficient process. • The Cu{sub 2}O sample exhibited the 1D array structure and <span class="hlt">porous</span> nanosheet morphology. • The as-prepared Cu{sub 2}O <span class="hlt">porous</span> nanosheet arrays exhibited significantly improved photocatalytic activity. - Abstract: One-dimensional nanostructures are of great interest for a wide range of applications. In this work, we demonstrated the fabrication of visible-light-responsive Cu{sub 2}O <span class="hlt">porous</span> nanosheet arrays. The synthesis <span class="hlt">involved</span> the growth of Cu(OH){sub 2} nanosheet arrays on Cu mesh by solution-based corrosion and thermal transformation of Cu(OH){sub 2} nanosheet to Cu{sub 2}O <span class="hlt">porous</span> nanosheets on Cu mesh. Benefiting from the one dimensional array structure and <span class="hlt">porous</span> structure, the as-prepared Cu{sub 2}O <span class="hlt">porous</span> nanosheet arrays exhibited significantly improved photocatalytic activity for methyl orange degradation under visible light irradiation.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li class="active"><span>12</span></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_12 --> <div id="page_13" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li class="active"><span>13</span></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="241"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20100011222','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20100011222"><span id="translatedtitle">Freeze Tape Casting of Functionally Graded <span class="hlt">Porous</span> Ceramics</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Sofie, Stephen W.</p> <p>2007-01-01</p> <p>Freeze tape casting is a means of making preforms of ceramic sheets that, upon subsequent completion of fabrication processing, can have anisotropic and/or functionally graded properties that notably include aligned and graded porosity. Freeze tape casting was developed to enable optimization of the microstructures of <span class="hlt">porous</span> ceramic components for use as solid oxide electrodes in fuel cells: Through alignment and grading of pores, one can tailor surface areas and diffusion channels for flows of gas and liquid species <span class="hlt">involved</span> in fuel-cell reactions. Freeze tape casting offers similar benefits for fabrication of optimally <span class="hlt">porous</span> ceramics for use as catalysts, gas sensors, and filters.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014PhDT.......309S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014PhDT.......309S"><span id="translatedtitle">Processing and Modeling of <span class="hlt">Porous</span> Copper Using Sintering Dissolution Process</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Salih, Mustafa Abualgasim Abdalhakam</p> <p></p> <p>The growth of <span class="hlt">porous</span> metal has produced materials with improved properties as compared to non-metals and solid metals. <span class="hlt">Porous</span> metal can be classified as either open cell or closed cell. Open cell allows a fluid media to pass through it. Closed cell is made up of adjacent sealed pores with shared cell walls. Metal foams offer higher strength to weight ratios, increased <span class="hlt">impact</span> energy absorption, and a greater tolerance to high temperatures and adverse environmental conditions when compared to bulk materials. Copper and its alloys are examples of these, well known for high strength and good mechanical, thermal and electrical properties. In the present study, the <span class="hlt">porous</span> Cu was made by a powder metallurgy process, using three different space holders, sodium chloride, sodium carbonate and potassium carbonate. Several different samples have been produced, using different ratios of volume fraction. The densities of the <span class="hlt">porous</span> metals have been measured and compared to the theoretical density calculated using an equation developed for these foams. The <span class="hlt">porous</span> structure was determined with the removal of spacer materials through sintering process. The sintering process of each spacer material depends on the melting point of the spacer material. Processing, characterization, and mechanical properties were completed. These tests include density measurements, compression tests, computed tomography (CT) and scanning electron microscopy (SEM). The captured morphological images are utilized to generate the object-oriented finite element (OOF) analysis for the <span class="hlt">porous</span> copper. <span class="hlt">Porous</span> copper was formed with porosities in the range of 40-66% with density ranges from 3 to 5.2 g/cm3. A study of two different methods to measure porosity was completed. OOF (Object Oriented Finite Elements) is a desktop software application for studying the relationship between the microstructure of a material and its overall mechanical, dielectric, or thermal properties using finite element models based on</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/17930146','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/17930146"><span id="translatedtitle">Hydraulic contacts controlling water flow across <span class="hlt">porous</span> grains.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Carminati, A; Kaestner, A; Flühler, H; Lehmann, P; Or, D; Lehmann, E; Stampanoni, M</p> <p>2007-08-01</p> <p>Water flow between <span class="hlt">porous</span> grains varies widely depending on the water distribution in contacts between grains. The hydraulic behavior of contacts varies from highly conductive when water fills the contacts to a bottleneck to flow as water pressure drops and contact asperities rapidly drain. Such changes greatly <span class="hlt">impact</span> the hydraulic conductivity of <span class="hlt">porous</span> grain packs such as aggregated soil. The dominant driving force of water flow across contacts is capillarity, often quantified relative to gravity and viscous forces using the capillary and Bond numbers. For fast water infiltration, viscous forces dominate. For simplicity we modeled the water distribution between spherical <span class="hlt">porous</span> grains whose surfaces are covered by spherical bumps of much smaller radii. We provide experimental evidence obtained by neutron radiography and synchrotron-based x-ray tomographic microscopy documenting transitions in the flow behavior across contacts.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25615192','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25615192"><span id="translatedtitle">Anomalous transport and chaotic advection in homogeneous <span class="hlt">porous</span> media.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lester, D R; Metcalfe, G; Trefry, M G</p> <p>2014-12-01</p> <p>The topological complexity inherent to all <span class="hlt">porous</span> media imparts persistent chaotic advection under steady flow conditions, which, in concert with the no-slip boundary condition, generates anomalous transport. We explore the <span class="hlt">impact</span> of this mechanism upon longitudinal dispersion via a model random <span class="hlt">porous</span> network and develop a continuous-time random walk that predicts both preasymptotic and asymptotic transport. In the absence of diffusion, the ergodicity of chaotic fluid orbits acts to suppress longitudinal dispersion from ballistic to superdiffusive transport, with asymptotic variance scaling as σ(L)(2)(t)∼t(2)/(ln t)(3). These results demonstrate that anomalous transport is inherent to homogeneous <span class="hlt">porous</span> media and has significant implications for macrodispersion.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/25615192','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/25615192"><span id="translatedtitle">Anomalous transport and chaotic advection in homogeneous <span class="hlt">porous</span> media.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lester, D R; Metcalfe, G; Trefry, M G</p> <p>2014-12-01</p> <p>The topological complexity inherent to all <span class="hlt">porous</span> media imparts persistent chaotic advection under steady flow conditions, which, in concert with the no-slip boundary condition, generates anomalous transport. We explore the <span class="hlt">impact</span> of this mechanism upon longitudinal dispersion via a model random <span class="hlt">porous</span> network and develop a continuous-time random walk that predicts both preasymptotic and asymptotic transport. In the absence of diffusion, the ergodicity of chaotic fluid orbits acts to suppress longitudinal dispersion from ballistic to superdiffusive transport, with asymptotic variance scaling as σ(L)(2)(t)∼t(2)/(ln t)(3). These results demonstrate that anomalous transport is inherent to homogeneous <span class="hlt">porous</span> media and has significant implications for macrodispersion. PMID:25615192</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011AGUFM.H53L..08F&link_type=ABSTRACT','NASAADS'); return false;" href="http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011AGUFM.H53L..08F&link_type=ABSTRACT"><span id="translatedtitle">OPM: The Open <span class="hlt">Porous</span> Media Initiative</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Flemisch, B.; Flornes, K. M.; Lie, K.; Rasmussen, A.</p> <p>2011-12-01</p> <p>The principal objective of the Open <span class="hlt">Porous</span> Media (OPM) initiative is to develop a simulation suite that is capable of modeling industrially and scientifically relevant flow and transport processes in <span class="hlt">porous</span> media and bridge the gap between the different application areas of <span class="hlt">porous</span> media modeling, including reservoir mechanics, CO2 sequestration, biological systems, and product development of engineered media. The OPM initiative will provide a long-lasting, efficient, and well-maintained open-source software for flow and transport in <span class="hlt">porous</span> media built on modern software principles. The suite is released under the GNU General Public License (GPL). Our motivation is to provide a means to unite industry and public research on simulation of flow and transport in <span class="hlt">porous</span> media. For academic users, we seek to provide a software infrastructure that facilitates testing of new ideas on models with industry-standard complexity, while at the same time giving the researcher control over discretization and solvers. Similarly, we aim to accelerate the technology transfer from academic institutions to professional companies by making new research results available as free software of professional standard. The OPM initiative is currently supported by six research groups in Norway and Germany and funded by existing grants from public research agencies as well as from Statoil Petroleum and Total E&P Norge. However, a full-scale development of the OPM initiative requires substantially more funding and <span class="hlt">involvement</span> of more research groups and potential end users. In this talk, we will provide an overview of the current activities in the OPM initiative. Special emphasis will be given to the demonstration of the synergies achieved by combining the strengths of individual open-source software components. In particular, a new fully implicit solver developed within the DUNE-based simulator DuMux could be enhanced by the ability to read industry-standard Eclipse input files and to run on</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2007SPIE.6799E..07S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2007SPIE.6799E..07S"><span id="translatedtitle">Interfacing <span class="hlt">porous</span> silicon with biomolecules</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Sweetman, Martin J.; Graney, Sean D.; Voelcker, Nicolas H.</p> <p>2007-12-01</p> <p>The control of protein binding into nanostructured <span class="hlt">porous</span> surfaces is highly relevant to the development of advanced biosensors and other biodevices. Here, an investigation of the covalent immobilisation of a model protein (albumin) onto <span class="hlt">porous</span> silicon (pSi) films was conducted using a new alkene linker, the synthesis of which was developed. This alkene linker contained both hydrophobic and hydrophilic (oligoethylene glycol) sections and terminated in a protected thiol. The alkene was attached to freshly etched <span class="hlt">porous</span> silicon via thermal hydrosilylation, where further surface reactions resulted in the attachment of a maleimido N-hydroxysuccinimidyl (NHS) heterobifunctional crosslinker. Albumin was then covalently immobilised on the <span class="hlt">porous</span> silicon layer through reaction of the protein's amine groups and the NHS functional group of the crosslinker. Surface modification reactions were monitored by infrared spectroscopy and interferometric reflectance spectroscopy. Protein binding was monitored by infrared spectroscopy, fluorescence imaging and atomic force microscopy.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1150645','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1150645"><span id="translatedtitle"><span class="hlt">Porous</span> substrates filled with nanomaterials</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Worsley, Marcus A.; Baumann, Theodore F.; Satcher, Jr., Joe H.; Stadermann, Michael</p> <p>2014-08-19</p> <p>A composition comprising: at least one <span class="hlt">porous</span> carbon monolith, such as a carbon aerogel, comprising internal pores, and at least one nanomaterial, such as carbon nanotubes, disposed uniformly throughout the internal pores. The nanomaterial can be disposed in the middle of the monolith. In addition, a method for making a monolithic solid with both high surface area and good bulk electrical conductivity is provided. A <span class="hlt">porous</span> substrate having a thickness of 100 microns or more and comprising macropores throughout its thickness is prepared. At least one catalyst is deposited inside the <span class="hlt">porous</span> substrate. Subsequently, chemical vapor deposition is used to uniformly deposit a nanomaterial in the macropores throughout the thickness of the <span class="hlt">porous</span> substrate. Applications include electrical energy storage, such as batteries and capacitors, and hydrogen storage.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1040865','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1040865"><span id="translatedtitle"><span class="hlt">Porous</span> light-emitting compositions</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Burrell, Anthony K.; McCleskey, Thomas Mark; Jia, Quanxi; Bauer, Eve; Mueller, Alexander H.</p> <p>2012-04-17</p> <p>Light-emitting devices are prepared by coating a <span class="hlt">porous</span> substrate using a polymer-assisted deposition process. Solutions of metal precursor and soluble polymers having binding properties for metal precursor were coated onto <span class="hlt">porous</span> substrates. The coated substrates were heated at high temperatures under a suitable atmosphere. The result was a substrate with a conformal coating that did not substantially block the pores of the substrate.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25500631','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25500631"><span id="translatedtitle">Additively manufactured <span class="hlt">porous</span> tantalum implants.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wauthle, Ruben; van der Stok, Johan; Amin Yavari, Saber; Van Humbeeck, Jan; Kruth, Jean-Pierre; Zadpoor, Amir Abbas; Weinans, Harrie; Mulier, Michiel; Schrooten, Jan</p> <p>2015-03-01</p> <p>The medical device industry's interest in open <span class="hlt">porous</span>, metallic biomaterials has increased in response to additive manufacturing techniques enabling the production of complex shapes that cannot be produced with conventional techniques. Tantalum is an important metal for medical devices because of its good biocompatibility. In this study selective laser melting technology was used for the first time to manufacture highly <span class="hlt">porous</span> pure tantalum implants with fully interconnected open pores. The architecture of the <span class="hlt">porous</span> structure in combination with the material properties of tantalum result in mechanical properties close to those of human bone and allow for bone ingrowth. The bone regeneration performance of the <span class="hlt">porous</span> tantalum was evaluated in vivo using an orthotopic load-bearing bone defect model in the rat femur. After 12 weeks, substantial bone ingrowth, good quality of the regenerated bone and a strong, functional implant-bone interface connection were observed. Compared to identical <span class="hlt">porous</span> Ti-6Al-4V structures, laser-melted tantalum shows excellent osteoconductive properties, has a higher normalized fatigue strength and allows for more plastic deformation due to its high ductility. It is therefore concluded that this is a first step towards a new generation of open <span class="hlt">porous</span> tantalum implants manufactured using selective laser melting.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/25500631','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/25500631"><span id="translatedtitle">Additively manufactured <span class="hlt">porous</span> tantalum implants.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wauthle, Ruben; van der Stok, Johan; Amin Yavari, Saber; Van Humbeeck, Jan; Kruth, Jean-Pierre; Zadpoor, Amir Abbas; Weinans, Harrie; Mulier, Michiel; Schrooten, Jan</p> <p>2015-03-01</p> <p>The medical device industry's interest in open <span class="hlt">porous</span>, metallic biomaterials has increased in response to additive manufacturing techniques enabling the production of complex shapes that cannot be produced with conventional techniques. Tantalum is an important metal for medical devices because of its good biocompatibility. In this study selective laser melting technology was used for the first time to manufacture highly <span class="hlt">porous</span> pure tantalum implants with fully interconnected open pores. The architecture of the <span class="hlt">porous</span> structure in combination with the material properties of tantalum result in mechanical properties close to those of human bone and allow for bone ingrowth. The bone regeneration performance of the <span class="hlt">porous</span> tantalum was evaluated in vivo using an orthotopic load-bearing bone defect model in the rat femur. After 12 weeks, substantial bone ingrowth, good quality of the regenerated bone and a strong, functional implant-bone interface connection were observed. Compared to identical <span class="hlt">porous</span> Ti-6Al-4V structures, laser-melted tantalum shows excellent osteoconductive properties, has a higher normalized fatigue strength and allows for more plastic deformation due to its high ductility. It is therefore concluded that this is a first step towards a new generation of open <span class="hlt">porous</span> tantalum implants manufactured using selective laser melting. PMID:25500631</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2010ApSS..257..446S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2010ApSS..257..446S"><span id="translatedtitle">Influence of mechanochemical activation in various media on structure of <span class="hlt">porous</span> and non-<span class="hlt">porous</span> silicas</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Sydorchuk, V.; Khalameida, S.; Zazhigalov, V.; Skubiszewska-Zięba, J.; Leboda, R.; Wieczorek-Ciurowa, K.</p> <p>2010-11-01</p> <p>Influence of mechanochemical activation on <span class="hlt">porous</span> structure and surface properties of <span class="hlt">porous</span> and non-<span class="hlt">porous</span> silicas in air, water and ethanol has been studied. Milled samples have been investigated with help of nitrogen adsorption-desorption, mercury porometry, thermogravimetric analysis, FTIR and ESR spectroscopy. It has been revealed that destruction of <span class="hlt">porous</span> structure of silicagel at dry milling and, on the contrary, formation of <span class="hlt">porous</span> silica from non-<span class="hlt">porous</span> powders (aerosils) during treatment in liquid media occurs.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015JMPSo..84..436M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015JMPSo..84..436M"><span id="translatedtitle">An analytical model for <span class="hlt">porous</span> single crystals with ellipsoidal voids</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Mbiakop, A.; Constantinescu, A.; Danas, K.</p> <p>2015-11-01</p> <p>A rate-(in)dependent constitutive model for <span class="hlt">porous</span> single crystals with arbitrary crystal anisotropy (e.g., FCC, BCC, HCP, etc.) containing general ellipsoidal voids is developed. The proposed model, denoted as modified variational model (MVAR), is based on the nonlinear variational homogenization method, which makes use of a linear comparison <span class="hlt">porous</span> material to estimate the response of the nonlinear <span class="hlt">porous</span> single crystal. Periodic multi-void finite element simulations are used in order to validate the MVAR for a large number of parameters including cubic (FCC, BCC) and hexagonal (HCP) crystal anisotropy, various creep exponents (i.e., nonlinearity), several stress triaxiality ratios, general void shapes and orientations and various porosity levels. The MVAR model, which <span class="hlt">involves</span> a priori no calibration parameters, is found to be in good agreement with the finite element results for all cases considered in the rate-dependent context. The model is then used in a predictive manner to investigate the complex response of <span class="hlt">porous</span> single crystals in several cases with strong coupling between the anisotropy of the crystal and the (morphological) anisotropy induced by the shape and orientation of the voids. Finally, a simple way of calibrating the MVAR with just two adjustable parameters is depicted in the rate-independent context so that an excellent agreement with the FE simulation results is obtained. In this last case, this proposed model can be thought as a generalization of the Gurson model in the context of <span class="hlt">porous</span> single crystals and general ellipsoidal void shapes and orientations.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/21499737','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/21499737"><span id="translatedtitle"><span class="hlt">Impact</span> of Cranial Irradiation Added to Intrathecal Conditioning in Hematopoietic Cell Transplantation in Adult Acute Myeloid Leukemia With Central Nervous System <span class="hlt">Involvement</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Mayadev, Jyoti S.; Douglas, James G.; Storer, Barry E.; Appelbaum, Frederick R.; Storb, Rainer</p> <p>2011-05-01</p> <p>Purpose: Neither the prognostic importance nor the appropriate management of central nervous system (CNS) <span class="hlt">involvement</span> is known for patients with acute myeloid leukemia (AML) undergoing hematopoietic cell transplantation (HCT). We examined the <span class="hlt">impact</span> of a CNS irradiation boost to standard intrathecal chemotherapy (ITC). Methods and Materials: From 1995 to 2005, a total of 648 adult AML patients received a myeloablative HCT: 577 patients were CNS negative (CNS-), and 71 were CNS positive (CNS+). Of the 71 CNS+ patients, 52 received intrathecal chemotherapy alone (CNS+ITC), and 19 received ITC plus an irradiation boost (CNS+RT). Results: The CNS-, CNS+ITC, and CNS+RT patients had 1- and 5-year relapse-free survivals (RFS) of 43% and 35%, 15% and 6%, and 37% and 32%, respectively. CNS+ITC patients had a statistically significant worse RFS compared with CNS- patients (hazard ratio [HR], 2.65; 95% confidence interval [CI], 2.0-3.6; p < 0.0001). CNS+RT patients had improved relapse free survival over that of CNS+ITC patients (HR, 0.45; 95% CI, 0.2-0.8; p = 0.01). The 1- and 5-year overall survivals (OS) of patients with CNS-, CNS+ITC, and CNS+RT, were 50% and 38%, 21% and 6%, and 53% and 42%, respectively. The survival of CNS+RT were significantly better than CNS+ITC patients (p = 0.004). After adjusting for known risk factors, CNS+RT patients had a trend toward lower relapse rates and reduced nonrelapse mortality. Conclusions: CNS+ AML is associated with a poor prognosis. The role of a cranial irradiation boost to intrathecal chemotherapy appears to mitigate the risk of CNS disease, and needs to be further investigated to define optimal treatment strategies.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/22136546','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/22136546"><span id="translatedtitle">A <span class="hlt">POROUS</span>, LAYERED HELIOPAUSE</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Swisdak, M.; Drake, J. F.; Opher, M. E-mail: drake@umd.edu</p> <p>2013-09-01</p> <p>The picture of the heliopause (HP)-the boundary between the domains of the Sun and the local interstellar medium (LISM)-as a pristine interface with a large rotation in the magnetic field fails to describe recent Voyager 1 (V1) data. Magnetohydrodynamic (MHD) simulations of the global heliosphere reveal that the rotation angle of the magnetic field across the HP at V1 is small. Particle-in-cell simulations, based on cuts through the MHD model at V1's location, suggest that the sectored region of the heliosheath (HS) produces large-scale magnetic islands that reconnect with the interstellar magnetic field while mixing LISM and HS plasma. Cuts across the simulation reveal multiple, anti-correlated jumps in the number densities of LISM and HS particles, similar to those observed, at the magnetic separatrices. A model is presented, based on both the observations and simulations, of the HP as a <span class="hlt">porous</span>, multi-layered structure threaded by magnetic fields. This model further suggests that contrary to the conclusions of recent papers, V1 has already crossed the HP.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013PhDT........26D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013PhDT........26D"><span id="translatedtitle">Stability of Chromium Carbide/Chromium Oxide Based <span class="hlt">Porous</span> Ceramics in Supercritical Water</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Dong, Ziqiang</p> <p></p> <p>This research was aimed at developing <span class="hlt">porous</span> ceramics as well as ceramic-metal composites that can be potentially used in Gen-IV supercritical water reactors (SCWR). The research mainly includes two parts: 1) fabricating and engineering the <span class="hlt">porous</span> ceramics and <span class="hlt">porous</span> ceramic-metal composite; 2) Evaluating the stability of the <span class="hlt">porous</span> ceramics in SCW environments. Reactive sintering in carbonaceous environments was used to fabricate <span class="hlt">porous</span> Cr3C2/Cr2O3-based ceramic. A new process consisting of freeze casting and reactive sintering has also been successfully developed to fabricate highly <span class="hlt">porous</span> Cr3C 2 ceramics with multiple interconnected pores. Various amounts of cobalt powders were mixed with ceramic oxides in order to modify the <span class="hlt">porous</span> structure and property of the <span class="hlt">porous</span> carbide obtained by reactive sintering. The hardness of the M(Cr,Co)7C3-Co composite has been evaluated and rationalized based on the solid solution of cobalt in the ceramic phase, the composite effect of soft Co metal and the <span class="hlt">porous</span> structure of the ceramic materials. Efforts have also been made in fabricating and evaluating interpenetrating Cr3C2-Cu composites formed by infiltrating liquid copper into <span class="hlt">porous</span> Cr3C2. The corrosion evaluation mainly focused on assessing the stability of <span class="hlt">porous</span> Cr3C2 and Cr2O3 under various SCW conditions. The corrosion tests showed that the <span class="hlt">porous</span> Cr3C 2 is stable in SCW at temperatures below 425°C. However, cracking and disintegrating of the <span class="hlt">porous</span> Cr3C2 occurred when the SCW temperature increased above 425°C. Mechanisms of the corrosion attack were also investigated. The <span class="hlt">porous</span> Cr2O3 obtained by oxidizing the <span class="hlt">porous</span> Cr3C2 was exposed to various SCW environments. It was found that the stability of Cr 2O 3 was dependent on its morphology and the SCW testing conditions. Increasing SCW temperature increased the dissociation rate of the Cr2O 3. Adding proper amount of Y2O3 can increase the stability of the <span class="hlt">porous</span> Cr2O3 in SCW. It was also concluded that decreasing</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Romance&pg=2&id=EJ1039711','ERIC'); return false;" href="http://eric.ed.gov/?q=Romance&pg=2&id=EJ1039711"><span id="translatedtitle">The <span class="hlt">Impact</span> of Direct <span class="hlt">Involvement</span> I and Direct <span class="hlt">Involvement</span> II Experiences on Secondary School Students' Social Capital, as Measured by Co-Cognitive Factors of the Operation Houndstooth Intervention Theory</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Sands, Michelle M.; Heilbronner, Nancy N.</p> <p>2014-01-01</p> <p>A mixed-methods study grounded in Renzulli's Operation Houndstooth Intervention Theory examined the <span class="hlt">impact</span> of different types of volunteer experiences on the six co-cognitive factors (Optimism, Courage, Romance With a Topic/Discipline, Sensitivity to Human Concerns, Physical/Mental Energy, and Vision/Sense of Destiny) associated with the…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009PhDT........85K','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009PhDT........85K"><span id="translatedtitle">In-situ growth of <span class="hlt">porous</span> alumino-silicates and fabrication of nano-<span class="hlt">porous</span> membranes</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Kodumuri, Pradeep</p> <p>2009-12-01</p> <p>Feasibility of depositing continuous films of nano-<span class="hlt">porous</span> alumino-silicates, primarily zeolites and MCM-41, on metallic and non-metallic substrates was examined with an aim to develop membranes for separation of gaseous mixtures and also for application as hydrogen storage material. Mesoporous silica was deposited in-side the pores of these nano-<span class="hlt">porous</span> disks with an aim to develop membranes for selective separations. Our study <span class="hlt">involves</span> supported zeolite film growth on substrates using in-situ hydrothermal synthesis. Faujasite, Silicalite and Mesoporous silica have been grown on various metallic and non-metallic supports. Metallic substrates used for film growth included anodized titanium, sodium hydroxide treated Titanium, Anodized aluminum, and sintered copper. A non-metallic substrate used was nano-<span class="hlt">porous</span> aluminum oxide. Zeolite film growth was characterized using Scanning Electron Microscope (AMRAY 1820) and High Resolution Transmission electron microscope. Silicalite was found to grow uniformly on all the substrates to form a uniform and closely packed film. Faujasite tends to grow in the form of individual particles which do not inter-grow like silicalite to form a continuous film. Mesoporous silica was found to grow uniformly on anodized aluminum compared to growth on sintered copper and anodized titanium. Mesoporous silica growth on AnodiscRTM was found to cover more than half the surface of the substrate. Commercially obtained AnodiscRTM was found to have cylindrical channels of the pore branching into each other and since we needed pore channels of uniform dimension for Mesoporous silica growth, we have fabricated nano-<span class="hlt">porous</span> alumina with uniform pore channels. Nano-<span class="hlt">porous</span> alumina membranes containing uniform distribution of through thickness cylindrical pore channels were fabricated using anodization of aluminum disks. Free-standing nano-<span class="hlt">porous</span> alumina membranes were used as templates for electro-deposition in order to fabricate nickel and palladium nano</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26975034','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26975034"><span id="translatedtitle">Absorption of impinging water droplet in <span class="hlt">porous</span> stones.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lee, J B; Radu, A I; Vontobel, P; Derome, D; Carmeliet, J</p> <p>2016-06-01</p> <p>This paper presents an experimental investigation and numerical analysis of the absorption of water droplets <span class="hlt">impacting</span> <span class="hlt">porous</span> stones. The absorption process of an impinging droplet is here fully characterized from spreading to evaporation in terms of absorbed mass during droplet depletion and moisture content distribution in a time-resolved manner for three different natural stones. High-speed imaging and neutron radiography are used to quantify moisture absorption in <span class="hlt">porous</span> stones of varying moisture properties from deposition until depletion. During <span class="hlt">impact</span> and spreading, the droplet exhibits a dynamic non-wetting behavior. At maximum spreading, the droplet undergoes pinning, resulting into the contact radius remaining constant until droplet depletion. Absorption undergoes two phases: initially, absorption is hindered due a contact resistance attributed to entrapped air; afterwards, a more perfect capillary contact occurs and absorption goes on until depletion, concurrently with evaporation and further redistribution. A finite-element numerical model for isothermal unsaturated moisture transport in <span class="hlt">porous</span> media captures the phases of mass absorption in good agreement with the experimental data. Droplet spreading and absorption are highly determined by the <span class="hlt">impact</span> velocity of the droplet, while moisture content redistribution after depletion is much less dependent on <span class="hlt">impact</span> conditions.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011PhDT........76M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011PhDT........76M"><span id="translatedtitle">Modeling isothermal and non-isothermal flows in <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Mohseni Languri, Ehsan</p> <p>2011-12-01</p> <p>A complete understanding of the physics of flow and heat transfer phenomena in <span class="hlt">porous</span> media is vital for accurate simulation of flow processes in industrial applications. In one such application pertaining to liquid composite molding (LCM) for manufacturing polymer composites, the fiber preforms used in LCM as reinforcements are limited not only to the single-scale <span class="hlt">porous</span> media in the form of random fiber-mats, but also include dual-scale <span class="hlt">porous</span> media in the form of woven or stitched fiber-mats. The conventional flow physics is not able to model the resin filling process in LCM <span class="hlt">involving</span> the dual-scale <span class="hlt">porous</span> media. In this study, the flow in dual-scale <span class="hlt">porous</span> media is studied in order to predict the permeability of these fiber mats. The effect of aspect ratio of the fiber preform on the accuracy and flow during permeability estimation in single- and dual-scale <span class="hlt">porous</span> media is analyzed experimentally and numerically. Flow of liquid in a free channel bounded on one side by <span class="hlt">porous</span> medium is studied next, and two well-known boundary conditions of stress continuity and stress jump at the interface of the two regions are evaluated numerically. A point-wise solution for Stokes flow through periodic and non periodic <span class="hlt">porous</span> media (made of cylindrical particles) adjacent to the free channel is presented using the Imite element based CFD software COMSOL. The efficacy of the two interfacial conditions is evaluated after volume averaging the point-wise velocity using a long averaging volume, also called the representative elementary volume or REV, and then comparing such a volume-averaged velocity profile with the available analytical solution. The investigation is carried out for five different porosities at three different Reynolds numbers to cover a wide range of applications. The presence of randomly-placed cylinders during the creation of non-periodic <span class="hlt">porous</span> media damps out spatial fluctuations in the averaged velocity observed in periodic <span class="hlt">porous</span> media. The analytical</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li class="active"><span>13</span></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_13 --> <div id="page_14" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li class="active"><span>14</span></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="261"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20110011143','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20110011143"><span id="translatedtitle">Acoustic Absorption in <span class="hlt">Porous</span> Materials</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Kuczmarski, Maria A.; Johnston, James C.</p> <p>2011-01-01</p> <p>An understanding of both the areas of materials science and acoustics is necessary to successfully develop materials for acoustic absorption applications. This paper presents the basic knowledge and approaches for determining the acoustic performance of <span class="hlt">porous</span> materials in a manner that will help materials researchers new to this area gain the understanding and skills necessary to make meaningful contributions to this field of study. Beginning with the basics and making as few assumptions as possible, this paper reviews relevant topics in the acoustic performance of <span class="hlt">porous</span> materials, which are often used to make acoustic bulk absorbers, moving from the physics of sound wave interactions with <span class="hlt">porous</span> materials to measurement techniques for flow resistivity, characteristic impedance, and wavenumber.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19720000753','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19720000753"><span id="translatedtitle">Joining <span class="hlt">porous</span> components to solid metal structures</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Fortini, A.; Tulisiak, G.</p> <p>1972-01-01</p> <p>Process for joining <span class="hlt">porous</span> metal material to solid metal structure without cracking or blockage of <span class="hlt">porous</span> component is described. Procedures of electron beam welding and electroforming are discussed. Illustration of microstructure resulting from process is included.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/911718','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/911718"><span id="translatedtitle">FLUID FLOW, SOLUTE MIXING AND PRECIPITATION IN <span class="hlt">POROUS</span> MEDIA</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Redden, George D; Y. Fang; T.D. Scheibe; A.M. Tartakovsky; Fox, Don T; Fujita, Yoshiko; White, Timothy A</p> <p>2006-09-01</p> <p> carbonate ions came into contact along a parallel flow boundary and mixed by dispersion and diffusion. The result is the propagation of calcium carbonate precipitates along the solution-solution boundary in the direction of flow. As carbonate precipitates fill the pore space mixing of the two solutions is restricted and therefore precipitation, flow, and transport are coupled. The distribution of carbonate phases is a complex interaction <span class="hlt">involving</span> precipitation and dissolution kinetics, which are functions of pore-scale saturation indices and solute ratios, heterogeneous vs. homogeneous nucleation and growth mechanisms and changes in porosity and flow. Experimental and modeling results illustrate challenges in understanding the macroscopic and microscopic phenomena that depend on solute mixing, the relevance of molecular and pore-scale processes to the macroscopic behavior, and potential <span class="hlt">impact</span> on metal mobility in <span class="hlt">porous</span> media. Mineral precipitation and changes in porosity are simulated at the pore-scale using the Smooth Particle Hydrodynamics method. Macroscopic simulations were performed using discretized, continuum-scale modeling with parameterization representing macroscopic media properties. One of the modeling goals is to use pore-scale simulations to provide the basis for parameterization of macroscopic (more practical) model predictions.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/868499','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/868499"><span id="translatedtitle">Metal recovery from <span class="hlt">porous</span> materials</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Sturcken, Edward F.</p> <p>1992-01-01</p> <p>A method for recovering plutonium and other metals from materials by leaching comprising the steps of incinerating the materials to form a <span class="hlt">porous</span> matrix as the residue of incineration, immersing the matrix into acid in a microwave-transparent pressure vessel, sealing the pressure vessel, and applying microwaves so that the temperature and the pressure in the pressure vessel increase. The acid for recovering plutonium can be a mixture of HBF.sub.4 and HNO.sub.3 and preferably the pressure is increased to at least 100 PSI and the temperature to at least 200.degree. C. The <span class="hlt">porous</span> material can be pulverized before immersion to further increase the leach rate.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=sage+AND+journals&pg=4&id=EJ835531','ERIC'); return false;" href="http://eric.ed.gov/?q=sage+AND+journals&pg=4&id=EJ835531"><span id="translatedtitle">Parental <span class="hlt">Involvement</span> in Latina/Latino-<span class="hlt">Impacted</span> Schools in the Midwest: Recognizing the Role and Function of Home-Based Knowledge and Practices</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Lopez, Gerardo R.; Vazquez, Vanessa A.</p> <p>2006-01-01</p> <p>This qualitative research study aims to provide rich narratives of parental <span class="hlt">involvement</span> in households of newcomer Latino immigrants in the Midwest. A total of 20 families participated in this 4-month research study. Findings suggest that parents do get <span class="hlt">involved</span> in traditional ways but view "consejos" (the giving of sage advice) as a form of…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED545474.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED545474.pdf"><span id="translatedtitle">The <span class="hlt">Impact</span> of Family <span class="hlt">Involvement</span> on the Education of Children Ages 3 to 8: A Focus on Literacy and Math Achievement Outcomes and Social-Emotional Skills</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Van Voorhis, Frances L.; Maier, Michelle F.; Epstein, Joyce L.; Lloyd, Chrishana M.</p> <p>2013-01-01</p> <p>This report summarizes research conducted primarily over the past 10 years on how families' <span class="hlt">involvement</span> in children's learning and development through activities at home and at school affects the literacy, mathematics, and social-emotional skills of children ages 3 to 8. A total of 95 studies of family <span class="hlt">involvement</span> are reviewed. These…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED414533.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED414533.pdf"><span id="translatedtitle"><span class="hlt">Impact</span> of School-Related, Community-Based, and Parental-<span class="hlt">Involvement</span> Activities on Achievement of At-Risk Youth in the High School Setting.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Young, Barbara N.; Helton, Carol; Whitley, Marilyn E.</p> <p></p> <p>If teenagers do not find support at school, home, or in the community, then they will find it with peers, gangs, or other means. Subsequently, the importance of extra-curricular <span class="hlt">involvement</span> for at-risk youth is reported in this paper; to what extent this <span class="hlt">involvement</span> had potential to influence performance in academics is also examined. Involvement…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=service+AND+customer&pg=3&id=ED552368','ERIC'); return false;" href="http://eric.ed.gov/?q=service+AND+customer&pg=3&id=ED552368"><span id="translatedtitle">Multi-Generational Perspectives: How They Interact and <span class="hlt">Impact</span> Service to Students and Their Families in an Age of Highly-<span class="hlt">Involved</span> Parents</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Wawrzusin, Andrea C.</p> <p>2013-01-01</p> <p>Although there have always been differences in how generations navigate decision-making in higher education, highly <span class="hlt">involved</span> parents have led to conflicting inter-generational educational expectations. This research study investigated the phenomenon of parental <span class="hlt">involvement</span> and how meanings on educational expectations vary depending on generation.…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1014938','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1014938"><span id="translatedtitle">Enhancement of thermal stability of <span class="hlt">porous</span> bodies comprised of stainless steel or an alloy</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Bischoff, Brian L.; Sutton, Theodore G.; Judkins, Roddie R.; Armstrong, Timothy R.; Adcock, Kenneth D.</p> <p>2010-11-09</p> <p>A method for treating a <span class="hlt">porous</span> item constructed of metal powder, such as a powder made of Series 400 stainless steel, <span class="hlt">involves</span> a step of preheating the <span class="hlt">porous</span> item to a temperature of between about 700 and 900.degree. C. degrees in an oxidizing atmosphere and then sintering the body in an inert or reducing atmosphere at a temperature which is slightly below the melting temperature of the metal which comprises the <span class="hlt">porous</span> item. The thermal stability of the resulting item is enhanced by this method so that the item retains its porosity and metallic characteristics, such as ductility, at higher (e.g. near-melting) temperatures.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/441854','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/biblio/441854"><span id="translatedtitle">Process of preparing tritiated <span class="hlt">porous</span> silicon</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Tam, S.W.</p> <p>1997-02-18</p> <p>A process of preparing tritiated <span class="hlt">porous</span> silicon is described in which <span class="hlt">porous</span> silicon is equilibrated with a gaseous vapor containing HT/T{sub 2} gas in a diluent for a time sufficient for tritium in the gas phase to replace hydrogen present in the pore surfaces of the <span class="hlt">porous</span> silicon. 1 fig.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/870840','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/870840"><span id="translatedtitle">Process of preparing tritiated <span class="hlt">porous</span> silicon</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Tam, Shiu-Wing</p> <p>1997-01-01</p> <p>A process of preparing tritiated <span class="hlt">porous</span> silicon in which <span class="hlt">porous</span> silicon is equilibrated with a gaseous vapor containing HT/T.sub.2 gas in a diluent for a time sufficient for tritium in the gas phase to replace hydrogen present in the pore surfaces of the <span class="hlt">porous</span> silicon.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED221973.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED221973.pdf"><span id="translatedtitle">Parent <span class="hlt">Involvement</span>.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>LaCrosse, Ed</p> <p></p> <p>The paper discusses the rationale and guidelines for parent <span class="hlt">involvement</span> in HCEEP (Handicapped Children's Early Education Program) projects. Ways of assessing parents' needs are reviewed, as are four types of services to meet the identified needs: parent education, direct participation, parent counseling, and parent provided programs. Materials and…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015PhDT.......340S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015PhDT.......340S"><span id="translatedtitle">Engineered Surface Properties of <span class="hlt">Porous</span> Tungsten from Cryogenic Machining</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Schoop, Julius Malte</p> <p></p> <p><span class="hlt">Porous</span> tungsten is used to manufacture dispenser cathodes due to it refractory properties. Surface porosity is critical to functional performance of dispenser cathodes because it allows for an impregnated ceramic compound to migrate to the emitting surface, lowering its work function. Likewise, surface roughness is important because it is necessary to ensure uniform wetting of the molten impregnate during high temperature service. Current industry practice to achieve surface roughness and surface porosity requirements <span class="hlt">involves</span> the use of a plastic infiltrant during machining. After machining, the infiltrant is baked and the cathode pellet is impregnated. In this context, cryogenic machining is investigated as a substitutionary process for the current plastic infiltration process. Along with significant reductions in cycle time and resource use, surface quality of cryogenically machined un-infiltrated (as-sintered) <span class="hlt">porous</span> tungsten has been shown to significantly outperform dry machining. The present study is focused on examining the relationship between machining parameters and cooling condition on the as-machined surface integrity of <span class="hlt">porous</span> tungsten. The effects of cryogenic pre-cooling, rake angle, cutting speed, depth of cut and feed are all taken into consideration with respect to machining-induced surface morphology. Cermet and Polycrystalline diamond (PCD) cutting tools are used to develop high performance cryogenic machining of <span class="hlt">porous</span> tungsten. Dry and pre-heated machining were investigated as a means to allow for ductile mode machining, yet severe tool-wear and undesirable smearing limited the feasibility of these approaches. By using modified PCD cutting tools, high speed machining of <span class="hlt">porous</span> tungsten at cutting speeds up to 400 m/min is achieved for the first time. Beyond a critical speed, brittle fracture and built-up edge are eliminated as the result of a brittle to ductile transition. A model of critical chip thickness ( hc ) effects based on cutting</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013EGUGA..1511914L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013EGUGA..1511914L"><span id="translatedtitle">Instability of fluid flow over saturated <span class="hlt">porous</span> medium</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Lyubimova, Tatyana; Kolchanova, Ekaterina; Lyubimov, Dmitry</p> <p>2013-04-01</p> <p>We investigate the stability of a fluid flow over a saturated <span class="hlt">porous</span> medium. The problem is of importance due to the applications to washing out of contaminants from the bottom layer of vegetation, whose properties are similar to the properties of <span class="hlt">porous</span> medium. In the case of <span class="hlt">porous</span> medium with the relatively high permeability and porosity the flow <span class="hlt">involves</span> a part of the fluid saturating the <span class="hlt">porous</span> medium, with the tangential fluid velocity drop occurring because of the resistance of the solid matrix. The drop leads to the instability analogous to Kelvin-Helmholtz one accompanied by the formation of travelling waves. In the present paper we consider a two-layer system consisting of a pure fluid layer and a <span class="hlt">porous</span> layer saturated by the fluid located underneath. The system is bounded by a rigid surface at the bottom and a non-deformable free surface at the top. It is under the gravity and inclined at a slight angle to the horizontal axis. The boundary conditions at the interface between the fluid and <span class="hlt">porous</span> layers are the continuity of fluid velocities and the balance of normal and tangential stresses taking into account the resistance of the solid matrix with respect to the fluid flow near the interface [1-2]. The problem is solved in the framework of the Brinkman model applying the classical shooting algorithm with orthogonalization. The stability boundaries of the stationary fluid flow over the saturated <span class="hlt">porous</span> medium with respect to the small oscillatory perturbations are obtained for the various values of the Darcy number and the ratio of the <span class="hlt">porous</span> layer thickness to the full thickness of the system d. It was shown that at the d > 0.5 with increasing the <span class="hlt">porous</span> layer thickness (or with decreasing of the fluid layer thickness) the stability threshold rises. This is because of the fact that the instability is primarily caused by perturbations located in the fluid layer. At the d < 0.5 the reduction of the <span class="hlt">porous</span> layer thickness leads to the stability threshold</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27644452','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27644452"><span id="translatedtitle">Superhydrophobic <span class="hlt">porous</span> networks for enhanced droplet shedding.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Liu, Yahua; Wang, Zuankai</p> <p>2016-09-20</p> <p>Recent research has shown that the use of submillimeter-scale tapered post arrays could generate the so-called pancake bouncing, which is characterized by the fast shedding of impinging drops from the surface in a pancake shape without undergoing the retraction stage as observed on conventional superhydrophobic surfaces. Despite this exciting discovery, the fabrication of this unique superhydrophobic surface with tapered post arrays <span class="hlt">involves</span> complex processes, hindering its wide applications in practical sectors. Here, we report on the facile strategy to prepare a new hierarchical multilayered superhydrophobic surface directly from commercially available <span class="hlt">porous</span> matrix that allows for efficient drop shedding. Further study shows that the enhanced drop mobility observed on such a surface is attributed to the synergistic cooperation of hierarchical structures endowing an adequate energy storage and effective energy release. The facile fabrication of superhydrophobic surface with enhanced drop mobility may find many practical applications including anti-icing, dropwise condensation and self-cleaning.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016NatSR...633817L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016NatSR...633817L"><span id="translatedtitle">Superhydrophobic <span class="hlt">porous</span> networks for enhanced droplet shedding</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Liu, Yahua; Wang, Zuankai</p> <p>2016-09-01</p> <p>Recent research has shown that the use of submillimeter-scale tapered post arrays could generate the so-called pancake bouncing, which is characterized by the fast shedding of impinging drops from the surface in a pancake shape without undergoing the retraction stage as observed on conventional superhydrophobic surfaces. Despite this exciting discovery, the fabrication of this unique superhydrophobic surface with tapered post arrays <span class="hlt">involves</span> complex processes, hindering its wide applications in practical sectors. Here, we report on the facile strategy to prepare a new hierarchical multilayered superhydrophobic surface directly from commercially available <span class="hlt">porous</span> matrix that allows for efficient drop shedding. Further study shows that the enhanced drop mobility observed on such a surface is attributed to the synergistic cooperation of hierarchical structures endowing an adequate energy storage and effective energy release. The facile fabrication of superhydrophobic surface with enhanced drop mobility may find many practical applications including anti-icing, dropwise condensation and self-cleaning.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5028764','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5028764"><span id="translatedtitle">Superhydrophobic <span class="hlt">porous</span> networks for enhanced droplet shedding</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Liu, Yahua; Wang, Zuankai</p> <p>2016-01-01</p> <p>Recent research has shown that the use of submillimeter-scale tapered post arrays could generate the so-called pancake bouncing, which is characterized by the fast shedding of impinging drops from the surface in a pancake shape without undergoing the retraction stage as observed on conventional superhydrophobic surfaces. Despite this exciting discovery, the fabrication of this unique superhydrophobic surface with tapered post arrays <span class="hlt">involves</span> complex processes, hindering its wide applications in practical sectors. Here, we report on the facile strategy to prepare a new hierarchical multilayered superhydrophobic surface directly from commercially available <span class="hlt">porous</span> matrix that allows for efficient drop shedding. Further study shows that the enhanced drop mobility observed on such a surface is attributed to the synergistic cooperation of hierarchical structures endowing an adequate energy storage and effective energy release. The facile fabrication of superhydrophobic surface with enhanced drop mobility may find many practical applications including anti-icing, dropwise condensation and self-cleaning. PMID:27644452</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/27644452','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/27644452"><span id="translatedtitle">Superhydrophobic <span class="hlt">porous</span> networks for enhanced droplet shedding.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Liu, Yahua; Wang, Zuankai</p> <p>2016-01-01</p> <p>Recent research has shown that the use of submillimeter-scale tapered post arrays could generate the so-called pancake bouncing, which is characterized by the fast shedding of impinging drops from the surface in a pancake shape without undergoing the retraction stage as observed on conventional superhydrophobic surfaces. Despite this exciting discovery, the fabrication of this unique superhydrophobic surface with tapered post arrays <span class="hlt">involves</span> complex processes, hindering its wide applications in practical sectors. Here, we report on the facile strategy to prepare a new hierarchical multilayered superhydrophobic surface directly from commercially available <span class="hlt">porous</span> matrix that allows for efficient drop shedding. Further study shows that the enhanced drop mobility observed on such a surface is attributed to the synergistic cooperation of hierarchical structures endowing an adequate energy storage and effective energy release. The facile fabrication of superhydrophobic surface with enhanced drop mobility may find many practical applications including anti-icing, dropwise condensation and self-cleaning. PMID:27644452</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2006Nanot..17..901Z','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2006Nanot..17..901Z"><span id="translatedtitle">Fabrication of <span class="hlt">porous</span> electrospun nanofibres</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Zhang, Y. Z.; Feng, Y.; Huang, Z.-M.; Ramakrishna, S.; Lim, C. T.</p> <p>2006-02-01</p> <p>Immiscible biopolymers of gelatin (Gt) and polycaprolactone (PCL) were first electrospun into a biomimicking composite fibre of Gt/PCL. Based on a phase separation study of the electrospun fibres, a leaching method was employed to generate 3D <span class="hlt">porous</span> nanofibres by selectively removing the water soluble component of gelatin in a 37 °C aqueous solution of phosphate buffered saline. It was found that leaching treatment gave rise to a unique nanotopography containing grooves, ridges and elliptical pores on the surface as well as inside of the resultant individual nanofibres. Brunauer-Emmett-Teller (BET) area measurement indicated that the formed 3D <span class="hlt">porous</span> fibres also brought in a pronounced increase of the surface area of fibres. The BET surface area of the <span class="hlt">porous</span> fibres was observed to be about 2.4 times that of the precursor fibres, up to 15.84 m2 g-1 at its relatively large size of 800 nm diameter. The 3D <span class="hlt">porous</span> fibres herein prepared could have considerable value for uses in developing highly integrated cell-scaffold tissue complexes and other industrial applications.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/21254921','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/21254921"><span id="translatedtitle">Neural Tissue as <span class="hlt">Porous</span> Media</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Basser, Peter J.</p> <p>2008-12-05</p> <p>The fields of MR in <span class="hlt">Porous</span> Media and Neuroradiology have largely developed separately during the past two decades with little appreciation of the problems, challenges and methodologies of the other. However, this trend is clearly changing and possibilities for significant cross-fertilization and synergies are now being realized.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li class="active"><span>14</span></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_14 --> <div id="page_15" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li class="active"><span>15</span></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="281"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/228041','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/228041"><span id="translatedtitle">Whey drying on <span class="hlt">porous</span> carriers</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Mitura, E.; Kaminski, W.</p> <p>1996-05-01</p> <p>Whey is treated very often as a waste which pollutes the natural environment. Whey which is a valuable source of protein, lacrose, vitamins and mineral salts should be utilized completely. The present paper is a proposal of whey drying on <span class="hlt">porous</span> carriers. It is proved experimentally that the proposed drying method guarantees good product quality.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/10162698','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/10162698"><span id="translatedtitle">Metal recovery from <span class="hlt">porous</span> materials</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Sturcken, E.F.</p> <p>1991-01-01</p> <p>The present invention relates to recovery of metals. More specifically, the present invention relates to the recovery of plutonium and other metals from <span class="hlt">porous</span> materials using microwaves. The United States Government has rights in this invention pursuant to Contract No. DE-AC09-89SR18035 between the US Department of Energy and Westinghouse Savannah River Company.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19680000438','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19680000438"><span id="translatedtitle">Hydrostatic testing of <span class="hlt">porous</span> assemblies</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Bigelow, W. L.</p> <p>1968-01-01</p> <p>Pores of the material were plugged with dust particles suspended in water. The plugging material used was a standard test dust prepared as a slurry in distilled water. This technique provides a permanent high-integrity seal for <span class="hlt">porous</span> material without affecting its physical properties, yet permitting pressure testing to verify structural adequacy.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3989372','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3989372"><span id="translatedtitle">Environmental concentrations of the selective serotonin reuptake inhibitor fluoxetine <span class="hlt">impact</span> specific behaviors <span class="hlt">involved</span> in reproduction, feeding and predator avoidance in the fish Pimephales promelas (fathead minnow)</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Weinberger, Joel; Klaper, Rebecca</p> <p>2014-01-01</p> <p>Pharmaceuticals and personal care products (PPCP) have been found in surface waters worldwide, but little is understood of their effects on the wildlife that inhabit these waters. Fluoxetine (Prozac; Eli Lilly), a highly prescribed selective serotonin reuptake inhibitor (SSRI), is a commonly found PPCP in surface water. The purpose of this project was to determine if environmentally relevant concentrations of fluoxetine <span class="hlt">impact</span> behavior that is important for population survival in native fish species, including reproduction, feeding and predator avoidance. Chronic 4-week exposures were conducted with doses ranging from 100 ng/L to 100 μg/L to cover a range of environmentally relevant concentrations up to higher concentrations comparable to other published studies with the same drug that have documented various physiological <span class="hlt">impacts</span>. Pimephales promelas (fathead minnow), a species native to North America, was used as it conducts a range of specific mating behaviors and therefore serves as an excellent model of specific <span class="hlt">impacts</span> on brain function. Fluoxetine concentrations as low as 1 μg/L, a concentration that has been found in many freshwater environments, were found to significantly <span class="hlt">impact</span> mating behavior, specifically nest building and defending in male fish. Males were also found to display aggression, isolation, and repetitive behaviors at higher concentrations. Female mating behavior was largely unaffected. In addition, predator avoidance behaviors in males and females were also <span class="hlt">impacted</span> at 1 μg/L. Feeding was <span class="hlt">impacted</span> at 10 μg/L and in the highest exposure (100 μg/L), egg production was limited by deaths of females due to significant male aggressive behaviors in first two weeks of exposure. Specific behavioral changes occurred at each concentration (most noticeably 1 μg/L and 100 μg/L) indicating a dose dependent effect that triggered different responses at lower exposures versus higher exposures or differential <span class="hlt">impacts</span> of dose depending on brain region</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2007AGUFM.S53B1273M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2007AGUFM.S53B1273M"><span id="translatedtitle">Spectral-Element Simulations of Wave Propagation in <span class="hlt">Porous</span> Media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Morency, C.; Tromp, J.</p> <p>2007-12-01</p> <p>Biot theory has been extensively used in the petroleum industry, where seismic surveys are performed to determine the physical properties of reservoir rocks. The theory is also of broad general interest when a physical understanding of the coupling between solid and fluid phases is desired. One fundamental result of Biot theory is the prediction of a second compressional wave, which attenuates rapidly, often referred to as "type II" or "Biot's slow compressional wave", in addition to the classical fast compressional and shear waves. The mathematical formulation of wave propagation in <span class="hlt">porous</span> media developed by Biot is based upon the principle of virtual work, ignoring processes at the microscopic level. Moreover, even if the Biot formulations are claimed to be valid for non-uniform porosity, gradients in porosity are not explicitly incorporated in the original theory. More recent studies focused on averaging techniques to derive the macroscopic <span class="hlt">porous</span> medium equations from the microscale, and made an attempt to derive an expression for the change in porosity, but there is still room for clarification of such an expression, and to properly integrate the effects of gradients in porosity. We aim to present a straightforward derivation of the main equations describing wave propagation in <span class="hlt">porous</span> media, with a particular emphasis on the effects of gradients in porosity. We also present a two dimensional numerical implementation of these equations using a spectral-element method. Finally, we have performed different benchmarks to validate our method, <span class="hlt">involving</span> acoustic-poroelastic waves interaction and wave propagation in heterogenous <span class="hlt">porous</span> media.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20080006974','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20080006974"><span id="translatedtitle"><span class="hlt">Porous</span> silicon carbide (SIC) semiconductor device</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Shor, Joseph S. (Inventor); Kurtz, Anthony D. (Inventor)</p> <p>1996-01-01</p> <p><span class="hlt">Porous</span> silicon carbide is fabricated according to techniques which result in a significant portion of nanocrystallites within the material in a sub 10 nanometer regime. There is described techniques for passivating <span class="hlt">porous</span> silicon carbide which result in the fabrication of optoelectronic devices which exhibit brighter blue luminescence and exhibit improved qualities. Based on certain of the techniques described <span class="hlt">porous</span> silicon carbide is used as a sacrificial layer for the patterning of silicon carbide. <span class="hlt">Porous</span> silicon carbide is then removed from the bulk substrate by oxidation and other methods. The techniques described employ a two-step process which is used to pattern bulk silicon carbide where selected areas of the wafer are then made <span class="hlt">porous</span> and then the <span class="hlt">porous</span> layer is subsequently removed. The process to form <span class="hlt">porous</span> silicon carbide exhibits dopant selectivity and a two-step etching procedure is implemented for silicon carbide multilayers.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013PhFl...25g6102A','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013PhFl...25g6102A"><span id="translatedtitle">Attenuation of shock waves propagating through nano-structured <span class="hlt">porous</span> materials</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Al-Qananwah, Ahmad K.; Koplik, Joel; Andreopoulos, Yiannis</p> <p>2013-07-01</p> <p><span class="hlt">Porous</span> materials have long been known to be effective in energy absorption and shock wave attenuation. These properties make them attractive in blast mitigation strategies. Nano-structured materials have an even greater potential for blast mitigation because of their high surface-to-volume ratio, a geometric parameter which substantially attenuates shock wave propagation. A molecular dynamics approach was used to explore the effects of this remarkable property on the behavior of traveling shocks <span class="hlt">impacting</span> on solid materials. The computational setup included a moving piston, a gas region and a target solid wall with and without a <span class="hlt">porous</span> structure. The gas and <span class="hlt">porous</span> solid were modeled by Lennard-Jones-like and effective atom potentials, respectively. The shock wave is resolved in space and time and its reflection from a solid wall is gradual, due to the wave's finite thickness, and entails a self-interaction as the reflected wave travels through the incoming incident wave. Cases investigated include a free standing <span class="hlt">porous</span> structure, a <span class="hlt">porous</span> structure attached to a wall and <span class="hlt">porous</span> structures with graded porosity. The effects of pore shape and orientation have been also documented. The results indicate that placing a nano-<span class="hlt">porous</span> material layer in front of the target wall reduced the stress magnitude and the energy deposited inside the solid by about 30 percent, while at the same time substantially decreasing the loading rate.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23650917','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23650917"><span id="translatedtitle">Undermining patient and public engagement and limiting its <span class="hlt">impact</span>: the consequences of the Health and Social Care Act 2012 on collective patient and public <span class="hlt">involvement</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Tritter, Jonathan Q; Koivusalo, Meri</p> <p>2013-06-01</p> <p>Patient and public <span class="hlt">involvement</span> has been at the heart of UK health policy for more than two decades. This commitment to putting patients at the heart of the British National Health Service (NHS) has become a central principle helping to ensure equity, patient safety and effectiveness in the health system. The recent Health and Social Care Act 2012 is the most significant reform of the NHS since its foundation in 1948. More radically, this legislation undermines the principle of patient and public <span class="hlt">involvement</span>, public accountability and returns the power for prioritisation of health services to an unaccountable medical elite. This legislation marks a sea-change in the approach to patient and public <span class="hlt">involvement</span> in the UK and signals a shift in the commitment of the UK government to patient-centred care.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26657931','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26657931"><span id="translatedtitle">Hydromagnetic Flow and Heat Transfer over a <span class="hlt">Porous</span> Oscillating Stretching Surface in a Viscoelastic Fluid with <span class="hlt">Porous</span> Medium.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Khan, Sami Ullah; Ali, Nasir; Abbas, Zaheer</p> <p>2015-01-01</p> <p>An analysis is carried out to study the heat transfer in unsteady two-dimensional boundary layer flow of a magnetohydrodynamics (MHD) second grade fluid over a <span class="hlt">porous</span> oscillating stretching surface embedded in <span class="hlt">porous</span> medium. The flow is induced due to infinite elastic sheet which is stretched periodically. With the help of dimensionless variables, the governing flow equations are reduced to a system of non-linear partial differential equations. This system has been solved numerically using the finite difference scheme, in which a coordinate transformation is used to transform the semi-infinite physical space to a bounded computational domain. The influence of the <span class="hlt">involved</span> parameters on the flow, the temperature distribution, the skin-friction coefficient and the local Nusselt number is shown and discussed in detail. The study reveals that an oscillatory sheet embedded in a fluid-saturated <span class="hlt">porous</span> medium generates oscillatory motion in the fluid. The amplitude and phase of oscillations depends on the rheology of the fluid as well as on the other parameters coming through imposed boundary conditions, inclusion of body force term and permeability of the <span class="hlt">porous</span> medium. It is found that amplitude of flow velocity increases with increasing viscoelastic and mass suction/injection parameters. However, it decreases with increasing the strength of the applied magnetic field. Moreover, the temperature of fluid is a decreasing function of viscoelastic parameter, mass suction/injection parameter and Prandtl number. PMID:26657931</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26657931','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26657931"><span id="translatedtitle">Hydromagnetic Flow and Heat Transfer over a <span class="hlt">Porous</span> Oscillating Stretching Surface in a Viscoelastic Fluid with <span class="hlt">Porous</span> Medium.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Khan, Sami Ullah; Ali, Nasir; Abbas, Zaheer</p> <p>2015-01-01</p> <p>An analysis is carried out to study the heat transfer in unsteady two-dimensional boundary layer flow of a magnetohydrodynamics (MHD) second grade fluid over a <span class="hlt">porous</span> oscillating stretching surface embedded in <span class="hlt">porous</span> medium. The flow is induced due to infinite elastic sheet which is stretched periodically. With the help of dimensionless variables, the governing flow equations are reduced to a system of non-linear partial differential equations. This system has been solved numerically using the finite difference scheme, in which a coordinate transformation is used to transform the semi-infinite physical space to a bounded computational domain. The influence of the <span class="hlt">involved</span> parameters on the flow, the temperature distribution, the skin-friction coefficient and the local Nusselt number is shown and discussed in detail. The study reveals that an oscillatory sheet embedded in a fluid-saturated <span class="hlt">porous</span> medium generates oscillatory motion in the fluid. The amplitude and phase of oscillations depends on the rheology of the fluid as well as on the other parameters coming through imposed boundary conditions, inclusion of body force term and permeability of the <span class="hlt">porous</span> medium. It is found that amplitude of flow velocity increases with increasing viscoelastic and mass suction/injection parameters. However, it decreases with increasing the strength of the applied magnetic field. Moreover, the temperature of fluid is a decreasing function of viscoelastic parameter, mass suction/injection parameter and Prandtl number.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4682809','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4682809"><span id="translatedtitle">Hydromagnetic Flow and Heat Transfer over a <span class="hlt">Porous</span> Oscillating Stretching Surface in a Viscoelastic Fluid with <span class="hlt">Porous</span> Medium</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Khan, Sami Ullah; Ali, Nasir; Abbas, Zaheer</p> <p>2015-01-01</p> <p>An analysis is carried out to study the heat transfer in unsteady two-dimensional boundary layer flow of a magnetohydrodynamics (MHD) second grade fluid over a <span class="hlt">porous</span> oscillating stretching surface embedded in <span class="hlt">porous</span> medium. The flow is induced due to infinite elastic sheet which is stretched periodically. With the help of dimensionless variables, the governing flow equations are reduced to a system of non-linear partial differential equations. This system has been solved numerically using the finite difference scheme, in which a coordinate transformation is used to transform the semi-infinite physical space to a bounded computational domain. The influence of the <span class="hlt">involved</span> parameters on the flow, the temperature distribution, the skin-friction coefficient and the local Nusselt number is shown and discussed in detail. The study reveals that an oscillatory sheet embedded in a fluid-saturated <span class="hlt">porous</span> medium generates oscillatory motion in the fluid. The amplitude and phase of oscillations depends on the rheology of the fluid as well as on the other parameters coming through imposed boundary conditions, inclusion of body force term and permeability of the <span class="hlt">porous</span> medium. It is found that amplitude of flow velocity increases with increasing viscoelastic and mass suction/injection parameters. However, it decreases with increasing the strength of the applied magnetic field. Moreover, the temperature of fluid is a decreasing function of viscoelastic parameter, mass suction/injection parameter and Prandtl number. PMID:26657931</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4001693','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4001693"><span id="translatedtitle"><span class="hlt">Involvement</span> of patients or their representatives in quality management functions in EU hospitals: implementation and <span class="hlt">impact</span> on patient-centred care strategies</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Groene, Oliver; Sunol, Rosa; Klazinga, Niek S.; Wang, Aolin; Dersarkissian, Maral; Thompson, Caroline A.; Thompson, Andrew; Arah, Onyebuchi A.; Klazinga, N; Kringos, DS; Lombarts, MJMH; Plochg, T; Lopez, MA; Secanell, M; Sunol, R; Vallejo, P; Bartels, P; Kristensen, S; Michel, P; Saillour-Glenisson, F; Vlcek, F; Car, M; Jones, S; Klaus, E; Bottaro, S; Garel, P; Saluvan, M; Bruneau, C; Depaigne-Loth, A; Shaw, C; Hammer, A; Ommen, O; Pfaff, H; Groene, O; Botje, D; Wagner, C; Kutaj-Wasikowska, H; Kutryba, B; Escoval, A; Lívio, A; Eiras, M; Franca, M; Leite, I; Almeman, F; Kus, H; Ozturk, K; Mannion, R; Arah, OA; DerSarkissian, M; Thompson, CA; Wang, A; Thompson, A</p> <p>2014-01-01</p> <p>Objective The objective of this study was to describe the <span class="hlt">involvement</span> of patients or their representatives in quality management (QM) functions and to assess associations between levels of <span class="hlt">involvement</span> and the implementation of patient-centred care strategies. Design A cross-sectional, multilevel study design that surveyed quality managers and department heads and data from an organizational audit. Setting Randomly selected hospitals (n = 74) from seven European countries (The Czech Republic, France, Germany, Poland, Portugal, Spain and Turkey). Participants Hospital quality managers (n = 74) and heads of clinical departments (n = 262) in charge of four patient pathways (acute myocardial infarction, stroke, hip fracture and deliveries) participated in the data collection between May 2011 and February 2012. Main Outcome Measures Four items reflecting essential patient-centred care strategies based on an on-site hospital visit: (1) formal survey seeking views of patients and carers, (2) written policies on patients' rights, (3) patient information literature including guidelines and (4) fact sheets for post-discharge care. The main predictors were patient <span class="hlt">involvement</span> in QM at the (i) hospital level and (ii) pathway level. Results Current levels of <span class="hlt">involving</span> patients and their representatives in QM functions in European hospitals are low at hospital level (mean score 1.6 on a scale of 0 to 5, SD 0.7), but even lower at departmental level (mean 0.6, SD 0.7). We did not detect associations between levels of <span class="hlt">involving</span> patients and their representatives in QM functions and the implementation of patient-centred care strategies; however, the smallest hospitals were more likely to have implemented patient-centred care strategies. Conclusions There is insufficient evidence that <span class="hlt">involving</span> patients and their representatives in QM leads to establishing or implementing strategies and procedures that facilitate patient-centred care; however, lack of evidence should not be</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011PhDT.......261C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011PhDT.......261C"><span id="translatedtitle">Neovascularization within <span class="hlt">porous</span> PEG hydrogels</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Chiu, Yu-Chieh</p> <p></p> <p>The goal of this work described was to develop techniques that can be used to enhance vascularized tissue formation in PEG-based hydrogels. In the first part of the study a technique was developed to generate <span class="hlt">porous</span> PEG hydrogels using a salt leaching technique. This technique was then used to examine the role of pore size on vascularization and tissue remodeling in <span class="hlt">porous</span> PEG hydrogel in vitro and in vitro. Both in vitro and in vivo studies showed that vessel invasion was pore size dependent. In addition, a thin layer of inflammatory tissue was observed between PEG hydrogel and blood vessels that formed within the gels. The <span class="hlt">porous</span> PEG hydrogels were very stable in vitro and in vivo and did not exhibit any signs of degradation. Hydrogels used in tissue engineering need to exhibit controlled degradation. In order to address the stability of PEG hydrogels, <span class="hlt">porous</span> hydrogels were rendered using degradable PEG-co-(L-Lactic acid) diacrylate PEG-PLLA-DA. This polymer is degraded via hydrolysis of the PLLA chains. The hydrogels were found to exhibit autofluorescence that allowed for the unique ability to nondestructively image hydrogel structure under fully swelled conditions using confocal microscopy. Interestingly, pore size remained stable though out the study, and was not a function of degradation. In addition, degradation time of <span class="hlt">porous</span> PEG-LLA-DA hydrogels was influenced by polymer concentration. Compressive modulus was a function of polymer concentration and pore size and decreased during hydrogel degradation. The incorporation of cell adhesion sequences into the hydrogel showed that they can support cell adhesion with morphology varying with pore size. This technique could be used to tailor <span class="hlt">porous</span> biodegradable scaffolds for tissue engineering applications. In the final portion of this thesis a poly-lysine (PLL) molecule was synthesized in order to allow clustering of adhesion sequences in PEG hydrogels. Clusters of peptide sequences have been shown to enhance cell</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://ntrs.nasa.gov/search.jsp?R=19990027885&hterms=porous+material&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D40%26Ntt%3Dporous%2Bmaterial','NASA-TRS'); return false;" href="http://ntrs.nasa.gov/search.jsp?R=19990027885&hterms=porous+material&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D40%26Ntt%3Dporous%2Bmaterial"><span id="translatedtitle">Advanced <span class="hlt">Porous</span> Coating for Low-Density Ceramic Insulation Materials</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Leiser, Daniel B.; Churchward, Rex; Katvala, Victor; Stewart, David; Balter, Aliza</p> <p>1988-01-01</p> <p>The need for improved coatings on low-density reusable surface insulation (RSI) materials used on the space shuttle has stimulated research into developing tougher coatings. The processing of a new <span class="hlt">porous</span> composite "coating" for RST called toughened unipiece fibrous insulation Is discussed. Characteristics including performance in a simulated high-speed atmospheric entry, morphological structure before and after this exposure, resistance to <span class="hlt">Impact</span>, and thermal response to a typical heat pulse are described. It is shown that this coating has improved <span class="hlt">impact</span> resistance while maintaining optical and thermal properties comparable to the previously available reaction-cured glass coating.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2005APS..SHK.T2005C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2005APS..SHK.T2005C"><span id="translatedtitle">A Compaction Model for Highly <span class="hlt">Porous</span> Silica Powder.</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Church, P. D.; Tsembelis, K.</p> <p>2005-07-01</p> <p>This paper describes research to develop an equation of state to describe the behaviour of a highly <span class="hlt">porous</span> silica powder. It shows that whilst molecular modelling techniques can be readily applied to develop a description of a compact material the description of the compaction process is more problematic. An empirical model, based upon the Lennard-Jones potential, has been shown to be capable of describing the compaction process observed in simple experiments. This development and application of the model in the Eulerian hydrocode GRIM to reproduce experimental plate <span class="hlt">impact</span> data over a wide range of <span class="hlt">impact</span> velocities is described and the results compared with experimental data.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED531947.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED531947.pdf"><span id="translatedtitle">Teenagers' Significant Experiences in Areas of Arts: A Study of the Subjectively Felt <span class="hlt">Impact</span> and Some Qualitative Aspects of Experiences <span class="hlt">Involving</span> Productive Arts Activities</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Finnas, Leif</p> <p>2012-01-01</p> <p>As a part of a larger project, this study focused primarily on Finland-Swedish ninth-graders' "productive" arts experiences (<span class="hlt">involving</span> music-making, acting, writing, painting/drawing, dancing), as these had been reported when the pupils had been asked to write down descriptions of "strong" experiences in arts areas (music, dramatic art, literature…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=scott+AND+courts&pg=4&id=EJ805599','ERIC'); return false;" href="http://eric.ed.gov/?q=scott+AND+courts&pg=4&id=EJ805599"><span id="translatedtitle">The <span class="hlt">Impact</span> of Gender and Family Processes on Mental Health and Substance Use Issues in a Sample of Court-<span class="hlt">Involved</span> Female and Male Adolescents</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Gavazzi, Stephen M.; Lim, Ji-Young; Yarcheck, Courtney M.; Bostic, Jennifer M.; Scheer, Scott D.</p> <p>2008-01-01</p> <p>Greater empirical attention directed toward gender-sensitive assessment strategies that concentrate on family-specific factors is thought to be both timely and necessary, especially with regard to outcome variables associated with mental health and substance abuse in at-risk adolescent populations. A sample of 2,646 court-<span class="hlt">involved</span> adolescents was…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/23313642','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/23313642"><span id="translatedtitle">Platelets self-assemble into <span class="hlt">porous</span> nacre during freeze casting.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Hunger, Philipp M; Donius, Amalie E; Wegst, Ulrike G K</p> <p>2013-03-01</p> <p>Nacre possesses a remarkable combination of mechanical properties. Its high stiffness, strength and toughness are attributed to a highly aligned structure of aragonite platelets "glued" together by a small fraction (∼5vol%) of polymer; theoretically it can be described by a shear-lag model of staggered tensile elements between which loads are transferred via shear. Despite extensive research, it has not been possible yet to manufacture this aligned structure as a bulk material of considerable volume with a fast and easy production process. Particularly <span class="hlt">porous</span> materials would benefit from enhanced wall material properties to compensate for performance loss due to their high porosity. An important application for such <span class="hlt">porous</span> materials are tissue scaffolds for bone substitution. Bone, like nacre, exhibits excellent mechanical properties, particularly an exceptionally high toughness, because of its composite structure of hydroxyapatite platelets aligned in a ∼35vol% polymer matrix. Through the freeze casting process, which results in a fast and straightforward self-assembly of platelet-shaped particles during directional solidification, highly <span class="hlt">porous</span> bulk materials with nacre-like cell walls can now be created. This <span class="hlt">porous</span> nacre outperforms by a factor of 1.5-4 in terms of stiffness, strength and toughness materials that have the same amount of porosity but do not exhibit the nacre-like microarchitecture. The self-assembly process presented in this study thus has tremendous potential for the creation of highly <span class="hlt">porous</span>, yet mechanically strong tissue scaffolds for low or medium load bearing bone substitute materials. Due to the versatility of the freeze casting process, materials with a self-assembled cell wall structure can be created from high-aspect ratio particles of all material classes. This enables material optimization for a great variety of applications such as <span class="hlt">impact</span> protection, filtration, catalysis, energy generation and storage, in addition to those with</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/21342302','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/21342302"><span id="translatedtitle">Experimental evidence for the phenotypic <span class="hlt">impact</span> of admixture between wild and biocontrol Asian ladybird (Harmonia axyridis) <span class="hlt">involved</span> in the European invasion.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Turgeon, J; Tayeh, A; Facon, B; Lombaert, E; De Clercq, P; Berkvens, N; Lundgren, J G; Estoup, A</p> <p>2011-05-01</p> <p>Hybridization can fuel evolutionary processes during biological invasions. The harlequin ladybird Harmonia axyridis has long been used as a biocontrol agent before the species became invasive worldwide. Previous analysis based on microsatellite data has shown that European invasive populations bear traces of admixture between an eastern North American source, which is at the origin of the worldwide invasion, and biocontrol strains used in Europe. In this study, we tested the hypothesis that this early admixture event may have fostered the European invasion by <span class="hlt">impacting</span> on the phenotypes of wild European populations. Mean life history traits of experimental F(1) hybrids are compared with pure parental sources and wild European crosses. Our results reveal a biased <span class="hlt">impact</span> whereby North American beetles benefitted from being admixed with European biocontrol strains. Resemblance between experimental hybrids and wild European invasive crosses further suggests a long-lasting effect of admixture that may still be at work and fostering invasiveness.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/7278897','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/biblio/7278897"><span id="translatedtitle">Metal recovery from <span class="hlt">porous</span> materials</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Sturcken, E.F.</p> <p>1992-10-13</p> <p>A method is described for recovering plutonium and other metals from materials by leaching comprising the steps of incinerating the materials to form a <span class="hlt">porous</span> matrix as the residue of incineration, immersing the matrix into acid in a microwave-transparent pressure vessel, sealing the pressure vessel, and applying microwaves so that the temperature and the pressure in the pressure vessel increase. The acid for recovering plutonium can be a mixture of HBF[sub 4] and HNO[sub 3] and preferably the pressure is increased to at least 100 PSI and the temperature to at least 200 C. The <span class="hlt">porous</span> material can be pulverized before immersion to further increase the leach rate.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li class="active"><span>15</span></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_15 --> <div id="page_16" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li class="active"><span>16</span></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="301"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006SPIE.6159E..23D&link_type=ABSTRACT','NASAADS'); return false;" href="http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006SPIE.6159E..23D&link_type=ABSTRACT"><span id="translatedtitle"><span class="hlt">Porous</span> glasses for optical sensors</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Dorosz, Dominik; Procyk, Bernadeta</p> <p>2006-03-01</p> <p>Microporous glasses from the Na II0-B II0 3-Si0 II system can be obtained by appropriate thermal and chemical treatment. During the thermal treatment the separation of the borate phase from the silicon skeleton has been occurred. The borates are in the form small drops joined to each other. In the course of chemical treatment the borates become leached in water, water solutions of acids or basis and the glass becomes <span class="hlt">porous</span>. Microporous glasses may find application in many branches of science and engineering. The applications depend on the internal arrangement, size and shape of pores. These parameters may be in a wide range modified by a change of the chemical composition. The received <span class="hlt">porous</span> glass was used as an element in optical fibre NO II sensor. The specific coloration reaction between organic reagents and NO II in the pores was occurred. It is possible to detection of 10-50 ppm NO II level.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/5328729','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/biblio/5328729"><span id="translatedtitle"><span class="hlt">Porous</span>-electrode preparation method</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Arons, R.M.; Dusek, J.T.</p> <p>1981-09-17</p> <p>A <span class="hlt">porous</span> sintered plaque is provided with a bimodal porosity that is especially well suited for use as an electrode within a molten carbonate fuel cell. The coarse porosity is sufficient for admitting gases into contact with the reaction surfaces while the fine porosity is wetted with and retains molten electrolyte on the reaction sites. The electrode structure is prepared by providing a very fine powder such as nickel oxide and blending the powder with a suitable decomposable binder to form a solid mass. The mass is comminuted into agglomerate size particles substantially larger than the fine oxide particles and formed into a cohesive compact for subsequent sintering. Sintering is carried out at sufficient conditions to bind the agglomerates together into a <span class="hlt">porous</span> structure having both coarse and fine porosity. Where lithiated nickel oxide cathodes are prepared, the sintering conditions can be moderate enough to retain substantial quantities of lithium within the electrode for adequate conductivity.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016PhRvP...5d4020M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016PhRvP...5d4020M"><span id="translatedtitle">Large Deformations of a Soft <span class="hlt">Porous</span> Material</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>MacMinn, Christopher W.; Dufresne, Eric R.; Wettlaufer, John S.</p> <p>2016-04-01</p> <p>Compressing a <span class="hlt">porous</span> material will decrease the volume of the pore space, driving fluid out. Similarly, injecting fluid into a <span class="hlt">porous</span> material can expand the pore space, distorting the solid skeleton. This poromechanical coupling has applications ranging from cell and tissue mechanics to geomechanics and hydrogeology. The classical theory of linear poroelasticity captures this coupling by combining Darcy's law with Terzaghi's effective stress and linear elasticity in a linearized kinematic framework. Linear poroelasticity is a good model for very small deformations, but it becomes increasingly inappropriate for moderate to large deformations, which are common in the context of phenomena such as swelling and damage, and for soft materials such as gels and tissues. The well-known theory of large-deformation poroelasticity combines Darcy's law with Terzaghi's effective stress and nonlinear elasticity in a rigorous kinematic framework. This theory has been used extensively in biomechanics to model large elastic deformations in soft tissues and in geomechanics to model large elastoplastic deformations in soils. Here, we first provide an overview and discussion of this theory with an emphasis on the physics of poromechanical coupling. We present the large-deformation theory in an Eulerian framework to minimize the mathematical complexity, and we show how this nonlinear theory simplifies to linear poroelasticity under the assumption of small strain. We then compare the predictions of linear poroelasticity with those of large-deformation poroelasticity in the context of two uniaxial model problems: fluid outflow driven by an applied mechanical load (the consolidation problem) and compression driven by a steady fluid throughflow. We explore the steady and dynamical errors associated with the linear model in both situations, as well as the <span class="hlt">impact</span> of introducing a deformation-dependent permeability. We show that the error in linear poroelasticity is due primarily to kinematic</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/7189244','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/7189244"><span id="translatedtitle">Theoretical studies of non-Newtonian and Newtonian fluid flow through <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Wu, Yu-Shu.</p> <p>1990-02-01</p> <p>A comprehensive theoretical study has been carried out on the flow behavior of both single and multiple phase non-Newtonian fluids in <span class="hlt">porous</span> media. This work is divided into three parts: development of numerical and analytical solutions; theoretical studies of transient flow of non-Newtonian fluids in <span class="hlt">porous</span> media; and applications of well test analysis and displacement efficiency evaluation to field problems. A fully implicit, integral finite difference model has been developed for simulation of non-Newtonian and Newtonian fluid flow through <span class="hlt">porous</span> media. Several commonly-used rheological models of power-law and Bingham plastic non-Newtonian fluids have been incorporated in the simulator. A Buckley-Leverett type analytical solution for one-dimensional, immiscible displacement <span class="hlt">involving</span> non-Newtonian fluids in <span class="hlt">porous</span> media has been developed. An integral method is also presented for the study of transient flow of Bingham fluids in <span class="hlt">porous</span> media. In addition, two well test analysis methods have been developed for analyzing pressure transient tests of power-law and Bingham fluids, respectively. Applications are included to demonstrate this new technology. The physical mechanisms <span class="hlt">involved</span> in immiscible displacement with non-Newtonian fluids in <span class="hlt">porous</span> media have been studied using the Buckley-Leverett type analytical solution. In another study, an idealized fracture model has been used to obtain some insights into the flow of a power-law fluid in a double-porosity medium. Transient flow of a general pseudoplastic fluid has been studied numerically. 125 refs., 91 figs., 12 tabs.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1986EOSTr..67T..92B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1986EOSTr..67T..92B"><span id="translatedtitle">Transport phenomena in <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Bear, Jacob; Corapcioglu, M. Yavuz</p> <p></p> <p>The Advanced Study Institute on Fundamentals of Transport Phenomena in <span class="hlt">Porous</span> Media, held July 14-23, 1985 in Newark, Del. and directed by Jacob Bear (Israel Institute of Technology, Haifa) and M. Yavuz Corapcioglu (City College of New York), under the auspices of NATO, was a sequel to the NATO Advanced Study Institute (ASI) held in 1982 (proceedings published as Fundamentals of Transport Phenomena in <span class="hlt">Porous</span> Media, J. Bear, and M.Y. Corapcioglu (Ed.), Martinus Nijhoff, Dordrecht, the Netherlands, 1984). The meeting was attended by 106 participants and lecturers from 21 countries.As in the first NATO/ASI, the objective of this meeting—which was a combination of a conference of experts and a teaching institute— was to present and discuss selected topics of transport in <span class="hlt">porous</span> media. In selecting topics and lecturers, an attempt was made to bridge the gap that sometimes exists between research and practice. An effort was also made to demonstrate the unified approach to the transport of mass of a fluid phase, components of a fluid phase, momentum, and heat in a <span class="hlt">porous</span> medium domain. The void space may be occupied by a single fluid phase or by a number of such phases; each fluid may constitute a multicomponent system; the solid matrix may be deformable; and the whole process of transport in the system may take place under nonisothermal conditions, with or without phase changes. Such phenomena are encountered in a variety of disciplines, e.g., petroleum engineering, civil engineering (in connection with groundwater flow and contamination), soil mechanics, and chemical engineering. One of the goals of the 1985 NATO/ASI, as in the 1982 institute, was to bring together experts from all these disciplines and enhance communication among them.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27322845','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27322845"><span id="translatedtitle">General Synthesis of <span class="hlt">Porous</span> Mixed Metal Oxide Hollow Spheres with Enhanced Supercapacitive Properties.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wang, Qinghong; Zhu, Yuxuan; Xue, Jing; Zhao, Xinsheng; Guo, Zaiping; Wang, Chao</p> <p>2016-07-13</p> <p><span class="hlt">Porous</span> mixed metal oxide (MMO) hollow spheres present high specific surface areas, abundant electrochemically active sites, and outstanding electrochemical properties, showing potential applications in energy storage. A hydro/solvothermal process, followed by a calcination process, can be a viable method for producing uniform <span class="hlt">porous</span> metal oxide hollow spheres. Unfortunately, this method usually <span class="hlt">involves</span> harsh synthetic conditions such as high temperature and intricate processing. Herein, we report a general and facile "ion adsorption-annealing" approach for the fabrication of uniform <span class="hlt">porous</span> MMO hollow spheres. The size and shell thickness of the as-obtained hollow spheres can be adjusted by the carbohydrate sphere templates and the solution concentration. Electrochemical measurements of the MMO hollow spheres demonstrate excellent supercapacitive properties, which may be due to the small size, ultrathin shells, and fine <span class="hlt">porous</span> structure.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015NRL....10..384T','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015NRL....10..384T"><span id="translatedtitle">Fabrication and Characterization of Monodisperse Magnetic <span class="hlt">Porous</span> Nickel Microspheres as Novel Catalysts</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Teng, Chao; He, Jie; Zhu, Lili; Ren, Lianbing; Chen, Jiwei; Hong, Mei; Wang, Yong</p> <p>2015-10-01</p> <p>A facile and efficient hard-templating strategy is reported for the preparation of <span class="hlt">porous</span> nickel microspheres with excellent uniformity and strong magnetism. The strategy <span class="hlt">involves</span> impregnation of <span class="hlt">porous</span> polymer microspheres with nickel precursors, calcination to remove the template, followed by thermal reduction. The morphology, structure, and the property of the Ni microspheres were characterized by scanning electron microscopy, X-ray powder diffraction, N2 adsorption-desorption isotherms, thermogravimetric analysis, and magnetic hysteresis measurement. The obtained <span class="hlt">porous</span> nickel microspheres were monodispersed with a particle size of 0.91 μm and crystallite size of 52 nm. Their saturation magnetization was much higher than that of Ni nanoparticles. The unique <span class="hlt">porous</span> nanostructured Ni microspheres possess catalytic activity and excellent recyclability, as demonstrated in the catalytic reduction of 4-nitrophenol to 4-aminophenol. The micropherical Ni catalysts could be easily separated either by an external magnetic field or by simple filtration.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/244538','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/244538"><span id="translatedtitle">Microscale transport in <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Rashidi, M.; Rinker, R.</p> <p>1996-04-01</p> <p>In-pore transport processes in homogeneous and heterogeneous <span class="hlt">porous</span> media have been investigated using novel 3D imaging techniques. The experimental system consists of a clear column packed with clear particles and a refractive index-matched fluid seeded with fluorescent tracers and an organic solute dye. By illuminating the <span class="hlt">porous</span> regions within the column with a planar sheet of laser beam, flow and transport processes through the <span class="hlt">porous</span> medium can be observed microscopically, and qualitative and quantitative in-pore transport information can be obtained at a good resolution and a high accuracy. Fluorescent images are captured and recorded at every vertical plane location while sweeping back and forth across the test section. These digitized transport images are then analyzed and accumulated over a 3D volume within the column. This paper reports on pore-scale observations of velocity, chemical concentration, and fluxes. Tests were undertaken with two separate columns. One is a rectangular column for chemical transport and bioremediation studies in aqueous heterogeneous systems and the other is a cylindrical column for flow and transport investigations in nonaqueous homogeneous systems.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/18355029','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/18355029"><span id="translatedtitle"><span class="hlt">Porous</span> devices derived from co-continuous polymer blends as a route for controlled drug release.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Salehi, Pouneh; Sarazin, Pierre; Favis, Basil D</p> <p>2008-04-01</p> <p>In this study we examine the release profile of bovine serum albumin (BSA) from a <span class="hlt">porous</span> polymer matrix derived from a co-continuous polymer blend. The porosity is generated through the selective extraction of one of the continuous phases. This is the first study to examine the approach of using morphologically tailored co-continuous polymer blends as a template for generating <span class="hlt">porous</span> polymer materials for use in controlled release. A method for the preparation of polymeric capsules is introduced, and the effect of matrix pore size and surface area on the BSA release profile is investigated. Furthermore, the effect of surface charge on release is examined by surface modification of the <span class="hlt">porous</span> substrate using layer-by-layer deposition techniques. Synthetic, nonerodible polymer, high-density polyethylene (HDPE), was used as a model substrate prepared by melt blending with two different styrene-ethylene-butylene copolymers. Blends with HDPE allow for the preparation of <span class="hlt">porous</span> substrates with small pore sizes (300 and 600 nm). A blend of polylactide (PLA) and polystyrene was also used to prepare <span class="hlt">porous</span> PLA with a larger pore size (1.5 microm). The extents of interconnectivity, surface area, and pore dimension of the prepared <span class="hlt">porous</span> substrates were examined via gravimetric solvent extraction, BET nitrogen adsorption, mercury porosimetry, and image analysis of scanning electron microscopy micrographs. With a loading protocol into the <span class="hlt">porous</span> HDPE and PLA <span class="hlt">involving</span> the alternate application of pressure and vacuum, it is shown that virtually the entire <span class="hlt">porous</span> network was accessible to BSA loading, and loading efficiencies of between 80% and 96% were obtained depending on the pore size of the carrier and the applied pressure. The release profile of BSA from the microporous structure was monitored by UV spectrophotometry. The influence of pore size, surface area, surface charge, and number of deposited layers is demonstrated. It is shown that an effective closed-cell structure</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2007AGUFM.H33H1717T','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2007AGUFM.H33H1717T"><span id="translatedtitle">Macroscopic properties of fractured <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Thovert, J.; Mourzenko, V. V.; Adler, P. M.</p> <p>2007-12-01</p> <p>The determination of the local fields in fractured <span class="hlt">porous</span> media is a challenging problem, because of the multiple scales that are <span class="hlt">involved</span> and of the possible nonlinearity of the governing equations. The purpose of this paper is to provide an overall view of the numerical technique which has been used to solve numerous problems. It is based on a three-dimensional discrete description of the fracture network and of the embedding matrix. Any fracture network geometry, any type of boundary condition, and any distribution of the fracture and matrix properties can be addressed, without simplifying approximations. The first step is to mesh the fracture network as it is by triangles of a controlled size. This meshing by an advancing front technique is done successively for each fracture and the intersections between fractures are taken into account. Then, the space in between the fractures is meshed by tetrahedra by the advancing front technique again. The faces of the tetrahedra which are in contact with fractures, coincide with the corresponding triangles in these fractures. The performances of these meshing codes will be illustrated by a few examples. The second step consists in discretizing the conservation equations by the finite volume technique. Specific properties are given to each fracture such as a surface permeability or a joint rigidity. This general technique has been applied to the basic and most important properties of fracture networks and of fractured <span class="hlt">porous</span> media (1). These properties are single and two phase flows, wether they are accompagnied or not by dispersion of a solute and mechanical properties possibly coupled with flow. These applications will be briefly illustrated by some examples, including when possible comparison with real data. Ref: (1) P.M. Adler, V.V. Mourzenko, J.-F. Thovert, I. Bogdanov, in Dynamics of fluids and transport in fractured rock, ed. B. Faybishenko, Geophysical Monograph Series, 162, 33, 2005.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22190767','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22190767"><span id="translatedtitle">Photocatalytic Properties of <span class="hlt">Porous</span> Silicon Nanowires.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Qu, Yongquan; Zhong, Xing; Li, Yujing; Liao, Lei; Huang, Yu; Duan, Xiangfeng</p> <p>2010-01-01</p> <p><span class="hlt">Porous</span> silicon nanowires are synthesized through metal assisted wet-chemical etch of highly-doped silicon wafer. The resulted <span class="hlt">porous</span> silicon nanowires exhibit a large surface area of 337 m(2)·g(-1) and a wide spectrum absorption across the entire ultraviolet, visible and near infrared regime. We further demonstrate that platinum nanoparticles can be loaded onto the surface of the <span class="hlt">porous</span> silicon nanowires with controlled density. These combined advancements make the <span class="hlt">porous</span> silicon nanowires an interesting material for photocatalytic applications. We show that the <span class="hlt">porous</span> silicon nanowires and platinum nanoparticle loaded <span class="hlt">porous</span> silicon nanowires can be used as effective photocatalysts for photocatalytic degradation of organic dyes and toxic pollutants under visible irradiation, and thus are of significant interest for organic waste treatment and environmental remediation.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2006SPIE.6037..246D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2006SPIE.6037..246D"><span id="translatedtitle">Nano-explosions in <span class="hlt">porous</span> silicon</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>du Plessis, Monuko; Conradie, Corrie</p> <p>2006-01-01</p> <p>The explosive properties of <span class="hlt">porous</span>-silicon, impregnated with an oxidant, were researched. The electrochemical etching of <span class="hlt">porous</span> silicon layers was investigated, and a <span class="hlt">porous</span> layer structural model is proposed to model the pore and crystallite dimensions of the <span class="hlt">porous</span> layer. A gravimetric experimental technique is described whereby the pore dimensions and specific surface area can be determined. A new relationship between pore size and specific surface area was established. The types of oxidants and their properties, as well as the impregnation of the <span class="hlt">porous</span> layers by different oxidants, were researched. It was observed that the filling of the pores by the oxidant is a function of pore diameter, specific surface area and type of oxidant used. The experimentally observed explosive properties are a function of silicon resistivity, <span class="hlt">porous</span> layer porosity and pore dimensions. It was found that there is an optimum pore size for the most energetic explosion. Future applications for this new technology are proposed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20130000617','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20130000617"><span id="translatedtitle">Thermally conductive <span class="hlt">porous</span> element-based recuperators</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Du, Jian Hua (Inventor); Chow, Louis C (Inventor); Lin, Yeong-Ren (Inventor); Wu, Wei (Inventor); Kapat, Jayanta (Inventor); Notardonato, William U. (Inventor)</p> <p>2012-01-01</p> <p>A heat exchanger includes at least one hot fluid flow channel comprising a first plurality of open cell <span class="hlt">porous</span> elements having first gaps there between for flowing a hot fluid in a flow direction and at least one cold fluid flow channel comprising a second plurality of open cell <span class="hlt">porous</span> elements having second gaps therebetween for flowing a cold fluid in a countercurrent flow direction relative to the flow direction. The thermal conductivity of the <span class="hlt">porous</span> elements is at least 10 W/mK. A separation member is interposed between the hot and cold flow channels for isolating flow paths associated these flow channels. The first and second plurality of <span class="hlt">porous</span> elements at least partially overlap one another to form a plurality of heat transfer pairs which transfer heat from respective ones of the first <span class="hlt">porous</span> elements to respective ones of the second <span class="hlt">porous</span> elements through the separation member.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012AIPC.1453..333H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012AIPC.1453..333H"><span id="translatedtitle">Analysis of vortex flow through <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Hassanipour, Fatemeh</p> <p>2012-05-01</p> <p>This study presents a numerical analysis of a two-dimensional flow propagating through <span class="hlt">porous</span> media. The vortical flow is produced by a piston-cylinder vortex ring generator. The objective is to understand the flow behavior in <span class="hlt">porous</span> media as a function of impingement velocity and <span class="hlt">porous</span> media properties, e.g. porosity and permeability. The results show that the formation of vortices and flow pattern in <span class="hlt">porous</span> media strongly depend on the permeability of the <span class="hlt">porous</span> media but only has a weak dependence on the porosity and Reynolds number. The average vorticity over the <span class="hlt">porous</span> media is calculated for various velocities, porosities and permeabilities. The results reveal that when Reynolds number is low, neither porosity nor permeability have any significant effect on average vorticity. However for high Reynolds numbers, the average vorticity is affected by permeability but not by porosity.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1234217','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1234217"><span id="translatedtitle">A Scoping Analysis Of The <span class="hlt">Impact</span> Of SiC Cladding On Late-Phase Accident Progression <span class="hlt">Involving</span> Core–Concrete Interaction</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Farmer, M. T.</p> <p>2015-11-01</p> <p>The overall objective of the current work is to carry out a scoping analysis to determine the <span class="hlt">impact</span> of ATF on late phase accident progression; in particular, the molten core-concrete interaction portion of the sequence that occurs after the core debris fails the reactor vessel and relocates into containment. This additional study augments previous work by including kinetic effects that govern chemical reaction rates during core-concrete interaction. The specific ATF considered as part of this study is SiC-clad UO<sub>2</sub>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4516172','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4516172"><span id="translatedtitle">NEIGHBORHOOD CHARACTERISTICS AND SEXUAL INTIMATE PARTNER VIOLENCE AGAINST WOMEN AMONG LOW-INCOME, DRUG-<span class="hlt">INVOLVED</span> NEW YORK CITY RESIDENTS: RESULTS FROM THE <span class="hlt">IMPACT</span> STUDIES</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Frye, Victoria; Blaney, Shannon; Cerda, Magdalena; Vlahov, David; Galea, Sandro; Ompad, Danielle C.</p> <p>2015-01-01</p> <p>We assessed relations among neighborhood characteristics and sexual intimate partner violence against women (SIPVAW), among low-income, drug-<span class="hlt">involved</span>, women (N=360) and men (N=670) in New York City between 2005 and 2009. Six percent of women (n=22) and 5% of men (n=33) reported experiencing and perpetrating SIPVAW in the past year with a main partner. In adjusted mixed models among women, neighborhood ethnic heterogeneity was significantly, negatively associated with SIPVAW victimization. In adjusted logistic models among men, neighborhood collective efficacy was significantly, positively associated with SIPVAW perpetration. Novel theoretical frameworks are needed to guide research on neighborhoods and partner violence. PMID:25062819</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/14519543','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/14519543"><span id="translatedtitle">The <span class="hlt">impact</span> of motor activity on intracerebral ERPs: P3 latency variability in modified auditory odd-ball paradigms <span class="hlt">involving</span> a motor task.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Kanovský, Petr; Streitová, Hana; Klajblová, Hana; Bares, Martin; Daniel, Pavel; Rektor, Ivan</p> <p>2003-09-01</p> <p>The P3 wave of event-related potentials was recorded with intracranial electrodes in 24 epileptic patients during the pre-surgical evaluation of epilepsy surgery. Three different cognitive auditory paradigms were used: (1) odd-ball paradigm with no output required (PGI) where patients had simply to recognize target tones, (2) odd-ball with motor response (PGII), where patients had to press a button in response to target tones, and (3) odd-ball with both counting task and motor response (PGIII), where patients had to recognize target tones, press a button in response to them, and count their number. The occurrence of P3 potential, its latency and amplitude, and the dependence of P3 latency on the task complexity were calculated. Identifiable P3 potentials in all the three paradigms were recorded from locations in mesial cortex (18 locations mesial temporal, eight locations mesial frontal, two locations mesial parietal) and lateral sites (eight sites lateral temporal, five lateral frontal, and two lateral parietal). P3 latency values ranged from 257 to 320 ms in all explored cortical areas when PGI was used; they significantly increased or decreased during PGII and PGIII, depending on the task and structure explored. In the mesial temporal cortex, the changes of P3 latency between paradigms were minimal. In the mesial parietal cortex, there was significant P3 delay in both PGII and PGIII relative to PGI. In the mesial frontal cortex, there was a significant latency decrease in PGII, and practically identical mean latency in PGI and PGIII. In all lateral cortices (temporal, frontal and parietal), there was always a P3 latency increase in PGII and PGIII relative to PGI, the most significant results being observed in the parietal and frontal lateral areas. The results support the multi-generator theory of P3. Prolongation of the mean P3 latency in lateral frontal and parietal cortices when the paradigm <span class="hlt">involved</span> the execution of a motor task might reflect specific gating</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1162233','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1162233"><span id="translatedtitle">Final Report - Montana State University - Microbial Activity and Precipitation at Solution-Solution Mixing Zones in <span class="hlt">Porous</span> Media</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Gerlach, Robin</p> <p>2014-10-31</p> <p>Background. The use of biological and chemical processes that degrade or immobilize contaminants in subsurface environments is a cornerstone of remediation technology. The enhancement of biological and chemical processes in situ, <span class="hlt">involves</span> the transport, displacement, distribution and mixing of one or more reactive agents. Biological and chemical reactions all require diffusive transport of solutes to reaction sites at the molecular scale and accordingly, the success of processes at the meter-scale and larger is dictated by the success of phenomena that occur at the micron-scale. However, current understanding of scaling effects on the mixing and delivery of nutrients in biogeochemically dynamic <span class="hlt">porous</span> media systems is limited, despite the limitations this imposes on the efficiency and effectiveness of the remediation challenges at hand. Objectives. We therefore proposed to experimentally characterize and computationally describe the growth, evolution, and distribution of microbial activity and mineral formation as well as changes in transport processes in <span class="hlt">porous</span> media that receive two or more reactive amendments. The model system chosen for this project was based on a method for immobilizing 90Sr, which <span class="hlt">involves</span> stimulating microbial urea hydrolysis with ensuing mineral precipitation (CaCO3), and co-precipitation of Sr. Studies at different laboratory scales were used to visualize and quantitatively describe the spatial relationships between amendment transport and consumption that stimulate the production of biomass and mineral phases that subsequently modify the permeability and heterogeneity of <span class="hlt">porous</span> media. Biomass growth, activity, and mass deposition in mixing zones was investigated using two-dimensional micro-model flow cells as well as flow cells that could be analyzed using synchrotron-based x-ray tomography. Larger-scale flow-cell experiments were conducted where the spatial distribution of media properties, flow, segregation of biological activity and</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://ntrs.nasa.gov/search.jsp?R=19930000586&hterms=transpiration&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3Dtranspiration','NASA-TRS'); return false;" href="http://ntrs.nasa.gov/search.jsp?R=19930000586&hterms=transpiration&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3Dtranspiration"><span id="translatedtitle">Transpiration Control Of Aerodynamics Via <span class="hlt">Porous</span> Surfaces</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Banks, Daniel W.; Wood, Richard M.; Bauer, Steven X. S.</p> <p>1993-01-01</p> <p>Quasi-active <span class="hlt">porous</span> surface used to control pressure loading on aerodynamic surface of aircraft or other vehicle, according to proposal. In transpiration control, one makes small additions of pressure and/or mass to cavity beneath surface of <span class="hlt">porous</span> skin on aerodynamic surface, thereby affecting rate of transpiration through <span class="hlt">porous</span> surface. <span class="hlt">Porous</span> skin located on forebody or any other suitable aerodynamic surface, with cavity just below surface. Device based on concept extremely lightweight, mechanically simple, occupies little volume in vehicle, and extremely adaptable.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1255215','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1255215"><span id="translatedtitle"><span class="hlt">Porous</span> media heat transfer for injection molding</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Beer, Neil Reginald</p> <p>2016-05-31</p> <p>The cooling of injection molded plastic is targeted. Coolant flows into a <span class="hlt">porous</span> medium disposed within an injection molding component via a <span class="hlt">porous</span> medium inlet. The <span class="hlt">porous</span> medium is thermally coupled to a mold cavity configured to receive injected liquid plastic. The <span class="hlt">porous</span> medium beneficially allows for an increased rate of heat transfer from the injected liquid plastic to the coolant and provides additional structural support over a hollow cooling well. When the temperature of the injected liquid plastic falls below a solidifying temperature threshold, the molded component is ejected and collected.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li class="active"><span>16</span></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_16 --> <div id="page_17" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li class="active"><span>17</span></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="321"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013EML.....9..783C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013EML.....9..783C"><span id="translatedtitle">Bimodal <span class="hlt">porous</span> gold opals for molecular sensing</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Chae, Weon-Sik; Yu, Hyunung; Ham, Sung-Kyoung; Lee, Myung-Jin; Jung, Jin-Seung; Robinson, David B.</p> <p>2013-11-01</p> <p>We have fabricated bimodal <span class="hlt">porous</span> gold skeletons by double-templating routes using poly(styrene) colloidal opals as templates. The fabricated gold skeletons show a bimodal pore-size distribution, with small pores within spheres and large pores between spheres. The templated bimodal <span class="hlt">porous</span> gold skeletons were applied in Raman scattering experiments to study sensing efficiency for probe molecules. We found that the bimodal <span class="hlt">porous</span> gold skeletons showed obvious enhancement of Raman scattering signals versus that of the unimodal <span class="hlt">porous</span> gold which only has interstitial pores of several hundred nanometers.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4501219','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4501219"><span id="translatedtitle">Designing and testing lightweight shoulder prostheses with hybrid actuators for movements <span class="hlt">involved</span> in typical activities of daily living and <span class="hlt">impact</span> absorption</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Sekine, Masashi; Kita, Kahori; Yu, Wenwei</p> <p>2015-01-01</p> <p>Unlike forearm amputees, transhumeral amputees have residual stumps that are too small to provide a sufficient range of operation for their prosthetic parts to perform usual activities of daily living. Furthermore, it is difficult for small residual stumps to provide sufficient <span class="hlt">impact</span> absorption for safe manipulation in daily living, as intact arms do. Therefore, substitution of upper limb function in transhumeral amputees requires a sufficient range of motion and sufficient viscoelasticity for shoulder prostheses under critical weight and dimension constraints. We propose the use of two different types of actuators, ie, pneumatic elastic actuators (PEAs) and servo motors. PEAs offer high power-to-weight performance and have intrinsic viscoelasticity in comparison with motors or standard industrial pneumatic cylinder actuators. However, the usefulness of PEAs in large working spaces is limited because of their short strokes. Servo motors, in contrast, can be used to achieve large ranges of motion. In this study, the relationship between the force and stroke of PEAs was investigated. The <span class="hlt">impact</span> absorption of both types of actuators was measured using a single degree-of-freedom prototype to evaluate actuator compliance for safety purposes. Based on the fundamental properties of the actuators identified, a four degree-of-freedom robotic arm is proposed for prosthetic use. The configuration of the actuators and functional parts was designed to achieve a specified range of motion and torque calculated from the results of a simulation of typical movements performed in usual activities of daily living. Our experimental results showed that the requirements for the shoulder prostheses could be satisfied. PMID:26185472</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED104543.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED104543.pdf"><span id="translatedtitle">Preparing Teachers for Parent <span class="hlt">Involvement</span>.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Safran, Daniel</p> <p></p> <p>This paper examines the potential <span class="hlt">impact</span> of parent <span class="hlt">involvement</span> in the formal education of their children and suggests ways that teacher education can be restructured to prepare teachers to work with parents. This paper attempts to answer five questions: (1) Why should parents be <span class="hlt">involved</span> in the formal education of their children? (2) Why should…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011AGUFM.B41H..03J','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011AGUFM.B41H..03J"><span id="translatedtitle"><span class="hlt">Impact</span> of Scale-Dependent Coupled Processes on Solute Fate and Transport in the Critical Zone: Case Studies <span class="hlt">Involving</span> Inorganic and Radioactive Contaminants</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Jardine, P. M.; Gentry, R. W.</p> <p>2011-12-01</p> <p>Soil, the thin veneer of matter covering the Earths surface that supports a web of living diversity, is often abused through anthropogenic inputs of toxic waste. This subsurface regime, coupled with life sustaining surface water and groundwater is known as the "Critical Zone". The disposal of radioactive and toxic organic and inorganic waste generated by industry and various government agencies has historically <span class="hlt">involved</span> shallow land burial or the use of surface impoundments in unsaturated soils and sediments. Presently, contaminated sites have been closing rapidly and many remediation strategies have chosen to leave contaminants in-place. As such, contaminants will continue to interact with the geosphere and investigations on long term changes and interactive processes is imperative to verify risks. In this presentation we provide a snap-shot of subsurface science research from the past 25 y that seeks to provide an improved understanding and predictive capability of multi-scale contaminant fate and transport processes in heterogeneous unsaturated and saturated environments. Investigations focus on coupled hydrological, geochemical, and microbial processes that control reactive contaminant transport and that <span class="hlt">involve</span> multi-scale fundamental research ranging from the molecular scale (e.g. synchrotrons, electron sources, arrays) to in situ plume interrogation strategies at the macroscopic scale (e.g. geophysics, field biostimulation, coupled processes monitoring). We show how this fundamental research is used to provide multi-process, multi-scale predictive monitoring and modeling tools that can be used at contaminated sites to (1) inform and improve the technical basis for decision making, and (2) assess which sites are amenable to natural attenuation and which would benefit from source zone remedial intervention.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22921844','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22921844"><span id="translatedtitle">Foam-oil interaction in <span class="hlt">porous</span> media: implications for foam assisted enhanced oil recovery.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Farajzadeh, R; Andrianov, A; Krastev, R; Hirasaki, G J; Rossen, W R</p> <p>2012-11-15</p> <p>The efficiency of a foam displacement process in enhanced oil recovery (EOR) depends largely on the stability of foam films in the presence of oil. Experimental studies have demonstrated the detrimental <span class="hlt">impact</span> of oil on foam stability. This paper reviews the mechanisms and theories (disjoining pressure, coalescence and drainage, entering and spreading of oil, oil emulsification, pinch-off, etc.) suggested in the literature to explain the <span class="hlt">impact</span> of oil on foam stability in the bulk and <span class="hlt">porous</span> media. Moreover, we describe the existing approaches to foam modeling in <span class="hlt">porous</span> media and the ways these models describe the oil effect on foam propagation in <span class="hlt">porous</span> media. Further, we present various ideas on an improvement of foam stability and longevity in the presence of oil. The outstanding questions regarding foam-oil interactions and modeling of these interactions are pointed out.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/10148699','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/10148699"><span id="translatedtitle">DDT modeling and shock compression experiments of <span class="hlt">porous</span> or damaged energetic materials</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Baer, M.R.; Anderson, M.U.; Graham, R.A.</p> <p>1994-05-01</p> <p>In this presentation, we present modeling of DDT in <span class="hlt">porous</span> energetic materials and experimental studies of a time-resolved, shock compression of highly <span class="hlt">porous</span> inert and reactive materials. This combined theoretical and experimental studies explore the nature of the microscale processes of consolidation, deformation and reaction which are key features of the shock response of <span class="hlt">porous</span> or damaged energetic materials. The theoretical modeling is based on the theory of mixtures in which multiphase mixtures are treated in complete nonequilibrium allowing for internal boundary effects associated mass/momentum and energy exchange between phases, relative flow, rate-dependent compaction behavior, multistage chemistry and interphase boundary effects. Numerous studies of low-velocity <span class="hlt">impacts</span> using a high resolution adaptive finite element method are presented which replicate experimental observations. The incorporation of this model into multi-material hydrocode analysis will be discussed to address the effects of confinement and its influence on accelerated combustion behavior. The experimental studies will focus on the use of PVDF piezoelectric polymer stress-rate gauge to precisely measure the input and propagating shock stress response of <span class="hlt">porous</span> materials. In addition to single constituent <span class="hlt">porous</span> materials, such as granular HMX, we have resolved shock waves in <span class="hlt">porous</span> composite intermetallic powders that confirm a dispersive wave nature which is highly morphologically and material dependent. This document consists of viewgraphs from the poster session.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/22318045','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/22318045"><span id="translatedtitle">ZnO/<span class="hlt">porous</span>-Si and TiO{sub 2}/<span class="hlt">porous</span>-Si nanocomposite nanopillars</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Wang, Dong Yan, Yong; Schaaf, Peter; Sharp, Thomas; Schönherr, Sven; Ronning, Carsten; Ji, Ran</p> <p>2015-01-01</p> <p><span class="hlt">Porous</span> Si nanopillar arrays are used as templates for atomic layer deposition of ZnO and TiO{sub 2}, and thus, ZnO/<span class="hlt">porous</span>-Si and TiO{sub 2}/<span class="hlt">porous</span>-Si nanocomposite nanopillars are fabricated. The diffusion of the precursor molecules into the inside of the <span class="hlt">porous</span> structure occurs via Knudsen diffusion and is strongly limited by the small pore size. The luminescence of the ZnO/<span class="hlt">porous</span>-Si nanocomposite nanopillars is also investigated, and the optical emission can be changed and even quenched after a strong plasma treatment. Such nanocomposite nanopillars are interesting for photocatalysis and sensors.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22955799','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22955799"><span id="translatedtitle">Health-related quality of life in Turkish patients with ankylosing spondylitis: <span class="hlt">impact</span> of peripheral <span class="hlt">involvement</span> on quality of life in terms of disease activity, functional status, severity of pain, and social and emotional functioning.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Yılmaz, Ozlem; Tutoğlu, Ahmet; Garip, Yeşim; Ozcan, Esra; Bodur, Hatice</p> <p>2013-05-01</p> <p>Ankylosing spondylitis (AS) affects sacroiliac joints at early stages and may <span class="hlt">involve</span> the axial skeleton at later stages of disease. Peripheral <span class="hlt">involvement</span> usually occurs in lower extremities. When it develops early in the disease course, it is a predictor of more aggressive disease. The aim of this study is to evaluate health-related quality of life (HRQoL) in AS and to assess the <span class="hlt">impact</span> of peripheral <span class="hlt">involvement</span> on HRQoL domains in terms of disease activity, functional status, pain, and social and emotional functioning. Seventy-four AS patients were included. Peripheral <span class="hlt">involvement</span> was present in 51.35 % of the patients. In 65.79 % of these cases the hips, in 31.58 % the knees, in 18.42 % the shoulders and in 13.16 % the ankles were affected. Patients were evaluated by Ankylosing Spondylitis Quality of Life (ASQoL), Short Form-36 (SF-36), Bath Ankylosing Spondylitis Disease Activity Index (BASDAI), Ankylosing Spondylitis Disease Activity Score (ASDAS) and Bath Ankylosing Spondylitis Functional Index (BASFI). ASQoL was strongly correlated with ASDAS, BASDAI, BASFI, and Bath Ankylosing Spondylitis Metrology Index (BASMI), severity of total pain, night pain, fatigue, morning stiffness and ESR. ASDAS and BASDAI showed the strongest correlation with ASQoL. Severity of total pain, functional status and severity of night pain followed it, respectively. Patients with peripheral <span class="hlt">involvement</span> scored significantly lower in all subgroups of SF36 and significantly higher in ASDAS, BASDAI, BASFI, BASMI and ASQoL scores and levels of pain, night pain, fatigue and morning stiffness. Peripheral <span class="hlt">involvement</span> is associated with more active disease and functional disability and has a negative influence on HRQoL including physical, social and emotional functioning.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25991267','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25991267"><span id="translatedtitle">The <span class="hlt">Impact</span> of eHealth and mHealth on doctor behavior and patient <span class="hlt">involvement</span>: an Israeli and Portuguese comparative approach.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Catan, Gabriel; Espanha, Rita; Veloso Mendes, Rita; Toren, Orly; Chinitz, David</p> <p>2015-01-01</p> <p>Based on the experience of a Short Term Scientific Mission (STSM) promoted by COST Net and developed in CIES/ISCTE-IUL (Portugal), this paper presents a reflection about the implementation of Information & Communication Technologies (ICT) in the healthcare sector in Israel and Portugal. Specifically, we focus on the <span class="hlt">impacts</span> of ICT or eHealth on patient empowerment, as perceived by doctors and managers in order to better comprehend the role of national policy and explore the options for building a national strategy regarding ICT in healthcare. The experience of the Portuguese healthcare system was selected and compared to the results found in a similar research in Israel. Methodologically, in-depth interviews with the Ministry of Health, the private sector, patients associations and researches were used to collect data. Purposeful sampling was used to select respondents, and secondary sources were used for triangulation. The findings of the research work show that the increased deployment of ICT has furthered patient empowerment (1). From the doctors' perspective, while ICT has provided more information in the long-run, changes of these magnitudes were not easy in the beginning. These findings were similar in both countries. The work concludes that ICT tools were successfully implemented and the general perception is that they have been beneficial. The work provides information in order to understand and improve ICT services. Additionally, the results suggest alternatives for future investments in these technologies.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/25991267','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/25991267"><span id="translatedtitle">The <span class="hlt">Impact</span> of eHealth and mHealth on doctor behavior and patient <span class="hlt">involvement</span>: an Israeli and Portuguese comparative approach.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Catan, Gabriel; Espanha, Rita; Veloso Mendes, Rita; Toren, Orly; Chinitz, David</p> <p>2015-01-01</p> <p>Based on the experience of a Short Term Scientific Mission (STSM) promoted by COST Net and developed in CIES/ISCTE-IUL (Portugal), this paper presents a reflection about the implementation of Information & Communication Technologies (ICT) in the healthcare sector in Israel and Portugal. Specifically, we focus on the <span class="hlt">impacts</span> of ICT or eHealth on patient empowerment, as perceived by doctors and managers in order to better comprehend the role of national policy and explore the options for building a national strategy regarding ICT in healthcare. The experience of the Portuguese healthcare system was selected and compared to the results found in a similar research in Israel. Methodologically, in-depth interviews with the Ministry of Health, the private sector, patients associations and researches were used to collect data. Purposeful sampling was used to select respondents, and secondary sources were used for triangulation. The findings of the research work show that the increased deployment of ICT has furthered patient empowerment (1). From the doctors' perspective, while ICT has provided more information in the long-run, changes of these magnitudes were not easy in the beginning. These findings were similar in both countries. The work concludes that ICT tools were successfully implemented and the general perception is that they have been beneficial. The work provides information in order to understand and improve ICT services. Additionally, the results suggest alternatives for future investments in these technologies. PMID:25991267</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2008AGUFM.S11B1731H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2008AGUFM.S11B1731H"><span id="translatedtitle">Infrasound Sensor and <span class="hlt">Porous</span>-Hose Filter Characterization Results</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Hart, D. M.; Harris, J. M.</p> <p>2008-12-01</p> <p>The Ground-Based Nuclear Explosion Monitoring Research and Development (GNEM R&D) program at Sandia National Laboratories (SNL) is regarded as the primary center for unbiased expertise in testing and evaluation of geophysical sensors and instrumentation for nuclear explosion monitoring. Over the past year much of our work has focused in the area of infrasound sensor characterization through the continuing development of an infrasound sensor characterization test-bed. Our main areas of focus have been in new sensor characterization and understanding the effects of <span class="hlt">porous</span>-hose filters for reducing acoustic background signals. Three infrasound sensors were evaluated for characteristics of instrument response, linearity and self-noise. The sensors tested were Chaparral Physics model 2.5 low-gain, New Mexico Tech All-Sensor and the Inter-Mountain Labs model SS avalanche sensor. For the infrasound sensors tested, the test results allow us to conclude that two of the three sensors had sufficiently quiet noise floor to be at or below the Acoustic low-noise model from 0.1 to 7 Hz, which make those sensors suitable to explosion monitoring. The other area of focus has been to understand the characteristics of <span class="hlt">porous</span>-hose filters used at some monitoring sites. For this, an experiment was designed in which two infrasound sensors were co- located. One sensor was connected to a typical <span class="hlt">porous</span>-hose spatial filter consisting of eight individual hoses covering a 30m aperture and the second sensor was left open to unimpeded acoustic input. Data were collected for several days, power spectrum computed for two-hour windows and the relative gain of the <span class="hlt">porous</span>-hose filters were estimated by dividing the power spectrum. The <span class="hlt">porous</span>-hose filter appears to attenuate less than 3 dB (rel 1 Pa**2/Hz) below 0.1 Hz and as much as 25 dB at 1 Hz and between 20 to 10 dB above 10 Hz. Several more experiments will be designed to address the effects of different characteristics of the individual <span class="hlt">porous</span></p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26663760','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26663760"><span id="translatedtitle">Prevalence of Cervical Enamel Projection and Its <span class="hlt">Impact</span> on Furcation <span class="hlt">Involvement</span> in Mandibular Molars: A Cone-Beam Computed Tomography Study in Koreans.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lim, Hyun-Chang; Jeon, Seok-Kyun; Cha, Jae-Kook; Lee, Jung-Seok; Choi, Seong-Ho; Jung, Ui-Won</p> <p>2016-03-01</p> <p>This study evaluated the prevalence of cervical enamel projections (CEPs) in mandibular molars, and analyzed the correlation between CEPs and furcation <span class="hlt">involvement</span> (FI) based on cone-beam computed tomography (CBCT) data in a Korean population. CBCT images obtained from March 2012 to August 2012 were analyzed. CEPs and FI on the buccal and lingual surface were classified in three-dimensionally reconstructed images and cross-sectional views, and the correlation between these two parameters was analyzed. In total, 982 teeth in 425 patients were analyzed. The overall prevalence rate of CEPs was 76% (71% and 27% on the buccal and lingual surfaces, respectively). Grade I CEPs were the most common, followed by CEPs of grades II and III. There was a statistically significant, but negligible correlation between the CEP grade and the degree of FI on the buccal and lingual surfaces. Within the limitations of this cross-sectional study, a high prevalence of CEPs were found in a Korean population, but the role of CEPs in provoking FI appeared not to be decisive.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25866120','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25866120"><span id="translatedtitle">Social <span class="hlt">Impact</span> of Stigma Regarding Tuberculosis Hindering Adherence to Treatment: A Cross Sectional Study <span class="hlt">Involving</span> Tuberculosis Patients in Rajshahi City, Bangladesh.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Chowdhury, Md Rocky Khan; Rahman, Md Shafiur; Mondal, Md Nazrul Islam; Sayem, Abu; Billah, Baki</p> <p>2015-01-01</p> <p>Stigma, considered a social disease, is more apparent in developing societies which are driven by various social affairs, and influences adherence to treatment. The aim of the present study was to examine levels of social stigma related to tuberculosis (TB) in sociodemographic context and identify the effects of sociodemographic factors on stigma. The study sample consisted of 372 TB patients. Data were collected using stratified sampling with simple random sampling techniques. T tests, chi-square tests, and binary logistic regression analysis were performed to examine correlations between stigma and sociodemographic variables. Approximately 85.9% of patients had experienced stigma. The most frequent indicator of the stigma experienced by patients <span class="hlt">involved</span> problems taking part in social programs (79.5%). Mean levels of stigma were significantly higher in women (55.5%), illiterate individuals (60.8%), and villagers (60.8%) relative to those of other groups. Chi-square tests revealed that education, monthly family income, and type of patient (pulmonary and extrapulmonary) were significantly associated with stigma. Binary logistic regression analysis demonstrated that stigma was influenced by sex, education, and type of patient. Stigma is one of the most important barriers to treatment adherence. Therefore, in interventions that aim to reduce stigma, strong collaboration between various institutions is essential.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1994PhFl....6.2515S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1994PhFl....6.2515S"><span id="translatedtitle">Simplified modeling of transition to detonation in <span class="hlt">porous</span> energetic materials</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Stewart, D. Scott; Asay, Blaine W.; Prasad, Kuldeep</p> <p>1994-07-01</p> <p>A simplified model that can predict the transitions from compaction to detonation and shock to detonation is given with the aim of describing experiments in beds of <span class="hlt">porous</span> HMX. In the case of compaction to detonation, the energy of early <span class="hlt">impact</span> generates a slowly moving, convective-reactive deflagration that expands near the piston face and evolves in a manner that is characteristic of confined deflagration to detonation transition. A single-phase state variable theory is adopted in contrast to a two-phase axiomatic mixture theory. The ability of the <span class="hlt">porous</span> material to compact is treated as an endothermic process. Reaction is treated as an exothermic process. The algebraic (Rankine-Hugoniot) steady wave analysis is given for inert compaction waves and steady detonation waves in a piston supported configuration, typical of the experiments carried out in <span class="hlt">porous</span> HMX. A structure analysis of the steady compaction wave is given. Numerical simulations of deflagration to detonation are carried out for parameters that describe an HMX-like material and compared with the experiments. The simple model predicts the high density plug that is observed in the experiments and suggests that the leading front of the plug is a secondary compaction wave. A shock to detonation transition is also numerically simulated.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/7239172','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/7239172"><span id="translatedtitle">Simplified modeling of transition to detonation in <span class="hlt">porous</span> energetic materials</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Stewart, D.S. ); Asay, B.W. ); Prasad, K. )</p> <p>1994-07-01</p> <p>A simplified model that can predict the transitions from compaction to detonation and shock to detonation is given with the aim of describing experiments in beds of <span class="hlt">porous</span> HMX. In the case of compaction to detonation, the energy of early <span class="hlt">impact</span> generates a slowly moving, convective-reactive deflagration that expands near the piston face and evolves in a manner that is characteristic of confined deflagration to detonation transition. A single-phase state variable theory is adopted in contrast to a two-phase axiomatic mixture theory. The ability of the <span class="hlt">porous</span> material to compact is treated as an endothermic process. Reaction is treated as an exothermic process. The algebraic (Rankine--Hugoniot) steady wave analysis is given for inert compaction waves and steady detonation waves in a piston supported configuration, typical of the experiments carried out in <span class="hlt">porous</span> HMX. A structure analysis of the steady compaction wave is given. Numerical simulations of deflagration to detonation are carried out for parameters that describe an HMX-like material and compared with the experiments. The simple model predicts the high density plug that is observed in the experiments and suggests that the leading front of the plug is a secondary compaction wave. A shock to detonation transition is also numerically simulated.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4316955','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4316955"><span id="translatedtitle">Biocompatibility and osteogenic properties of <span class="hlt">porous</span> tantalum</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>WANG, QIAN; ZHANG, HUI; LI, QIJIA; YE, LEI; GAN, HONGQUAN; LIU, YINGJIE; WANG, HUI; WANG, ZHIQIANG</p> <p>2015-01-01</p> <p><span class="hlt">Porous</span> tantalum has been reported to be a promising material for use in bone tissue engineering. In the present study, the biocompatibility and osteogenic properties of <span class="hlt">porous</span> tantalum were studied in vitro and in vivo. The morphology of <span class="hlt">porous</span> tantalum was observed using scanning electron microscopy (SEM). Osteoblasts were cultured with <span class="hlt">porous</span> tantalum, and cell morphology, adhesion and proliferation were investigated using optical microscopy and SEM. In addition, <span class="hlt">porous</span> tantalum rods were implanted in rabbits, and osteogenesis was observed using laser scanning confocal microscopy and hard tissue slice examination. The osteoblasts were observed to proliferate over time and adhere to the tantalum surface and pore walls, exhibiting a variety of shapes and intercellular connections. The <span class="hlt">porous</span> tantalum rod connected tightly with the host bone. At weeks 2 and 4 following implantation, new bone and small blood vessels were observed at the tantalum-host bone interface and pores. At week 10 after the <span class="hlt">porous</span> tantalum implantation, new bone tissue was observed at the tantalum-host bone interface and pores. By week 12, the tantalum-host bone interface and pores were covered with new bone tissue and the bone trabeculae had matured and connected directly with the materials. Therefore, the results of the present study indicate that <span class="hlt">porous</span> tantalum is non-toxic, biocompatible and a promising material for use in bone tissue engineering applications. PMID:25667628</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19680000331','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19680000331"><span id="translatedtitle">Electron beam selectively seals <span class="hlt">porous</span> metal filters</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Snyder, J. A.; Tulisiak, G.</p> <p>1968-01-01</p> <p>Electron beam welding selectively seals the outer surfaces of <span class="hlt">porous</span> metal filters and impedances used in fluid flow systems. The outer surface can be sealed by melting a thin outer layer of the <span class="hlt">porous</span> material with an electron beam so that the melted material fills all surface pores.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1265277','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1265277"><span id="translatedtitle">Thiazolothiazole-linked <span class="hlt">porous</span> organic polymers</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Zhu, Xiang; Tian, Chengcheng; Jin, Tian; Wang, Jitong; Mahurin, Shannon Mark; Mei, Wenwen; Xiong, Yan; Hu, Jun; Feng, Xinliang; Liu, Honglai; Dai, Sheng</p> <p>2014-10-07</p> <p>In this study, thiazolothiazole-linked <span class="hlt">porous</span> organic polymers have been synthesized from a facile catalyst-free condensation reaction between aldehydes and dithiooxamide under solvothermal conditions. The resultant <span class="hlt">porous</span> frameworks exhibit a highly selective uptake of CO<sub>2</sub> over N<sub>2</sub> under ambient conditions.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/pages/biblio/1265277-thiazolothiazole-linked-porous-organic-polymers','SCIGOV-DOEP'); return false;" href="http://www.osti.gov/pages/biblio/1265277-thiazolothiazole-linked-porous-organic-polymers"><span id="translatedtitle">Thiazolothiazole-linked <span class="hlt">porous</span> organic polymers</span></a></p> <p><a target="_blank" href="http://www.osti.gov/pages">DOE PAGES</a></p> <p>Zhu, Xiang; Tian, Chengcheng; Jin, Tian; Wang, Jitong; Mahurin, Shannon Mark; Mei, Wenwen; Xiong, Yan; Hu, Jun; Feng, Xinliang; Liu, Honglai; et al</p> <p>2014-10-07</p> <p>In this study, thiazolothiazole-linked <span class="hlt">porous</span> organic polymers have been synthesized from a facile catalyst-free condensation reaction between aldehydes and dithiooxamide under solvothermal conditions. The resultant <span class="hlt">porous</span> frameworks exhibit a highly selective uptake of CO2 over N2 under ambient conditions.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26920536','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26920536"><span id="translatedtitle">Postprandial kinetics of gene expression of proteins <span class="hlt">involved</span> in the digestive process in rainbow trout (O. mykiss) and <span class="hlt">impact</span> of diet composition.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Borey, Marion; Panserat, Stephane; Surget, Anne; Cluzeaud, Marianne; Plagnes-Juan, Elisabeth; Herman, Alexandre; Lazzarotto, Viviana; Corraze, Geneviève; Médale, Françoise; Lauga, Beatrice; Burel, Christine</p> <p>2016-08-01</p> <p>The <span class="hlt">impact</span> of increased incorporation of plant ingredients on diets for rainbow trout was evaluated in terms of gene expression of gastric (gastric lipase, pepsinogen) and intestinal (prolidase, maltase, phospholipase A2) digestive enzymes and nutrient transporters (peptide and glucose transporters), as well as of postprandial levels of plasma glucose, triglycerides and total free amino acids. For that purpose, trout alevins were fed from the start of exogenous feeding one of three different experimental diets: a diet rich in fish meal and fish oil (FM-FO), a plant-based diet (noFM-noFO) totally free from fish meal and fish oil, but containing plant ingredients and a Mixed diet (Mixed) intermediate between the FM-FO and noFM-noFO diets. After 16 months of rearing, all fish were left unfed for 72 h and then given a single meal to satiation. Blood, stomach and anterior intestine were sampled before the meal and at 2, 6 and 12 h after this meal. The postprandial kinetics of gene expression of gastric and intestinal digestive enzymes and nutrient transporters were then followed in trout fed the FM-FO diet. The postprandial profiles showed that the expression of almost all genes studied was stimulated by the presence of nutrients in the digestive tract of trout, but the timing (appearance of peaks) varied between genes. Based on these data, we have focused on the molecular response to dietary factors in the stomach and the intestine at 6 and 12 h after feeding, respectively. The reduction in FM and FO levels of dietary incorporation induced a significant decrease in the gene expression of gastric lipase, GLUT2 and PEPT1. The plasma glucose and triglycerides levels were also reduced in trout fed the noFM-noFO diet. Consequently, the present study suggests a decrease in digestive capacities in trout fed a diet rich in plant ingredients.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li class="active"><span>17</span></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_17 --> <div id="page_18" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li class="active"><span>18</span></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="341"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26920536','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26920536"><span id="translatedtitle">Postprandial kinetics of gene expression of proteins <span class="hlt">involved</span> in the digestive process in rainbow trout (O. mykiss) and <span class="hlt">impact</span> of diet composition.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Borey, Marion; Panserat, Stephane; Surget, Anne; Cluzeaud, Marianne; Plagnes-Juan, Elisabeth; Herman, Alexandre; Lazzarotto, Viviana; Corraze, Geneviève; Médale, Françoise; Lauga, Beatrice; Burel, Christine</p> <p>2016-08-01</p> <p>The <span class="hlt">impact</span> of increased incorporation of plant ingredients on diets for rainbow trout was evaluated in terms of gene expression of gastric (gastric lipase, pepsinogen) and intestinal (prolidase, maltase, phospholipase A2) digestive enzymes and nutrient transporters (peptide and glucose transporters), as well as of postprandial levels of plasma glucose, triglycerides and total free amino acids. For that purpose, trout alevins were fed from the start of exogenous feeding one of three different experimental diets: a diet rich in fish meal and fish oil (FM-FO), a plant-based diet (noFM-noFO) totally free from fish meal and fish oil, but containing plant ingredients and a Mixed diet (Mixed) intermediate between the FM-FO and noFM-noFO diets. After 16 months of rearing, all fish were left unfed for 72 h and then given a single meal to satiation. Blood, stomach and anterior intestine were sampled before the meal and at 2, 6 and 12 h after this meal. The postprandial kinetics of gene expression of gastric and intestinal digestive enzymes and nutrient transporters were then followed in trout fed the FM-FO diet. The postprandial profiles showed that the expression of almost all genes studied was stimulated by the presence of nutrients in the digestive tract of trout, but the timing (appearance of peaks) varied between genes. Based on these data, we have focused on the molecular response to dietary factors in the stomach and the intestine at 6 and 12 h after feeding, respectively. The reduction in FM and FO levels of dietary incorporation induced a significant decrease in the gene expression of gastric lipase, GLUT2 and PEPT1. The plasma glucose and triglycerides levels were also reduced in trout fed the noFM-noFO diet. Consequently, the present study suggests a decrease in digestive capacities in trout fed a diet rich in plant ingredients. PMID:26920536</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22156920','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22156920"><span id="translatedtitle">Chondroitin sulfate N-acetylgalactosaminyltransferase-1 (CSGalNAcT-1) <span class="hlt">involved</span> in chondroitin sulfate initiation: <span class="hlt">Impact</span> of sulfation on activity and specificity.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Gulberti, Sandrine; Jacquinet, Jean-Claude; Chabel, Matthieu; Ramalanjaona, Nick; Magdalou, Jacques; Netter, Patrick; Coughtrie, Michael W H; Ouzzine, Mohamed; Fournel-Gigleux, Sylvie</p> <p>2012-04-01</p> <p>Glycosaminoglycan (GAG) assembly initiates through the formation of a linkage tetrasaccharide region serving as a primer for both chondroitin sulfate (CS) and heparan sulfate (HS) chain polymerization. A possible role for sulfation of the linkage structure and of the constitutive disaccharide unit of CS chains in the regulation of CS-GAG chain synthesis has been suggested. To investigate this, we determined whether sulfate substitution of galactose (Gal) residues of the linkage region or of N-acetylgalactosamine (GalNAc) of the disaccharide unit influences activity and specificity of chondroitin sulfate N-acetylgalactosaminyltransferase-1 (CSGalNAcT-1), a key glycosyltransferase of CS biosynthesis. We synthesized a series of sulfated and unsulfated analogs of the linkage oligosaccharide and of the constitutive unit of CS and tested these molecules as potential acceptor substrates for the recombinant human CSGalNAcT-1. We show here that sulfation at C4 or C6 of the Gal residues markedly influences CSGalNAcT-1 initiation activity and catalytic efficiency. Kinetic analysis indicates that CSGalNAcT-1 exhibited 3.6-, 1.6-, and 2.2-fold higher enzymatic efficiency due to lower K(m) values toward monosulfated trisaccharides substituted at C4 or C6 position of Gal1, and at C6 of Gal2, respectively, compared with the unsulfated oligosaccharide. This highlights the critical influence of Gal substitution on both CSGalNAcT-1 activity and specifity. No GalNAcT activity was detected toward sulfated and unsulfated analogs of the CS constitutive disaccharide (GlcA-β1,3-GalNAc), indicating that CSGalNAcT-1 was <span class="hlt">involved</span> in initiation but not in elongation of CS chains. Our results strongly suggest that sulfation of the linkage region acts as a regulatory signal in CS chain initiation.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009EGUGA..11.5234B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009EGUGA..11.5234B"><span id="translatedtitle"><span class="hlt">Porous</span> Soil as Complex Network</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Benito, R. M.; Santiago, A.; Cárdenas, J. P.; Tarquis, A. M.; Borondo, F.; Losada, J. C.</p> <p>2009-04-01</p> <p>We present a complex network model based on a heterogeneous preferential attachment scheme [1,2] to quantify the structure of <span class="hlt">porous</span> soils [3]. Under this perspective pores are represented by nodes and the space for the flow of fluids between them are represented by links. Pore properties such as position and size are described by fixed states in a metric space, while an affinity function is introduced to bias the attachment probabilities of links according to these properties. We perform an analytical and numerical study of the degree distributions in the soil model and show that under reasonable conditions all the model variants yield a multiscaling behavior in the connectivity degrees, leaving a empirically testable signature of heterogeneity in the topology of pore networks. References [1] A. Santiago and R. M. Benito, "Emergence of multiscaling in heterogeneous complex networks". Int. J. Mod. Phys. C 18, 1591 (2007). [2] A. Santiago and R. M. Benito, "An extended formalism for preferential attachment in heterogeneous complex networks". Europhys. Lett. 82, 58004 (2008). [3] A. Santiago, R. M. Benito, J. P. Cárdenas, J. C. Losada, A. M. Tarquis and F. Borondo, "Multiscaling of <span class="hlt">porous</span> soils as heterogeneous complex networks". Nonl. Proc. Geophys. 15, 1-10 (2008).</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1021902','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1021902"><span id="translatedtitle">Microelectromechanical pump utilizing <span class="hlt">porous</span> silicon</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Lantz, Jeffrey W.; Stalford, Harold L.</p> <p>2011-07-19</p> <p>A microelectromechanical (MEM) pump is disclosed which includes a <span class="hlt">porous</span> silicon region sandwiched between an inlet chamber and an outlet chamber. The <span class="hlt">porous</span> silicon region is formed in a silicon substrate and contains a number of pores extending between the inlet and outlet chambers, with each pore having a cross-section dimension about equal to or smaller than a mean free path of a gas being pumped. A thermal gradient is provided along the length of each pore by a heat source which can be an electrical resistance heater or an integrated circuit (IC). A channel can be formed through the silicon substrate so that inlet and outlet ports can be formed on the same side of the substrate, or so that multiple MEM pumps can be connected in series to form a multi-stage MEM pump. The MEM pump has applications for use in gas-phase MEM chemical analysis systems, and can also be used for passive cooling of ICs.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2015NatCo...6E6083J&link_type=ABSTRACT','NASAADS'); return false;" href="http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2015NatCo...6E6083J&link_type=ABSTRACT"><span id="translatedtitle">Aerosol generation by raindrop <span class="hlt">impact</span> on soil</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Joung, Young Soo; Buie, Cullen R.</p> <p>2015-01-01</p> <p>Aerosols are investigated because of their significant <span class="hlt">impact</span> on the environment and human health. To date, windblown dust and sea salt from sea spray through bursting bubbles have been considered the chief mechanisms of environmental aerosol dispersion. Here we investigate aerosol generation from droplets hitting wettable <span class="hlt">porous</span> surfaces including various classifications of soil. We demonstrate that droplets can release aerosols when they influence <span class="hlt">porous</span> surfaces, and these aerosols can deliver elements of the <span class="hlt">porous</span> medium to the environment. Experiments on various <span class="hlt">porous</span> media including soil and engineering materials reveal that knowledge of the surface properties and <span class="hlt">impact</span> conditions can be used to predict when frenzied aerosol generation will occur. This study highlights new phenomena associated with droplets on <span class="hlt">porous</span> media that could have implications for the investigation of aerosol generation in the environment.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25586153','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25586153"><span id="translatedtitle">Aerosol generation by raindrop <span class="hlt">impact</span> on soil.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Joung, Young Soo; Buie, Cullen R</p> <p>2015-01-01</p> <p>Aerosols are investigated because of their significant <span class="hlt">impact</span> on the environment and human health. To date, windblown dust and sea salt from sea spray through bursting bubbles have been considered the chief mechanisms of environmental aerosol dispersion. Here we investigate aerosol generation from droplets hitting wettable <span class="hlt">porous</span> surfaces including various classifications of soil. We demonstrate that droplets can release aerosols when they influence <span class="hlt">porous</span> surfaces, and these aerosols can deliver elements of the <span class="hlt">porous</span> medium to the environment. Experiments on various <span class="hlt">porous</span> media including soil and engineering materials reveal that knowledge of the surface properties and <span class="hlt">impact</span> conditions can be used to predict when frenzied aerosol generation will occur. This study highlights new phenomena associated with droplets on <span class="hlt">porous</span> media that could have implications for the investigation of aerosol generation in the environment.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016E%26ES...36a2021B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016E%26ES...36a2021B"><span id="translatedtitle">Adsorption isotherm of non-azeotropic solution onto <span class="hlt">porous</span> adsorbents</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Bono, A.; Ramlan, N. A.; Anisuzzaman, S. M.; Chu, C. M.; Farm, Y. Y.</p> <p>2016-06-01</p> <p>Adsorption isotherm is essential component in the understanding of the adsorption process. Several methods of the measurements, analysis and interpretation of adsorption from solution have been reported in the literature. Most of the measurements of adsorption isotherm from solution were <span class="hlt">involved</span> the measurement of excess isotherm conducted at low region of sorbates concentration. Direct interpretation of excess adsorption isotherm as adsorption isotherm is always been practice. Therefore, in this work a study on the measurement of the adsorption isotherm from solution of non-azeotropic organic solvent mixture onto <span class="hlt">porous</span> adsorbents for whole range of liquid concentration was conducted. The study included the measurement of excess adsorption isotherm using conventional technique. Theoretical analysis and interpretation of adsorption isotherm from the excess isotherm were conducted using Pseudo Ideal Adsorption, Gibbs Dividing Plane Model and Langmuir-Fruendlich binary isotherm model. For organic solvents, acetone and propanol were chosen as the adsorbates due to the non-azeotropic properties in the mixture. Activated carbon and silicalite were chosen as adsorbents due to the different in their porosity such as macro <span class="hlt">porous</span> and micro <span class="hlt">porous</span> structure. The result of the study has revealed that the adsorption isotherm of non-azeotropic mixture onto activated carbon and silicalite can be interpreted as monolayer type of adsorption.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24407681','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24407681"><span id="translatedtitle">Microscale simulation of particle deposition in <span class="hlt">porous</span> media.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Boccardo, Gianluca; Marchisio, Daniele L; Sethi, Rajandrea</p> <p>2014-03-01</p> <p>In this work several geometries, each representing a different <span class="hlt">porous</span> medium, are considered to perform detailed computational fluid dynamics simulation for fluid flow, particle transport and deposition. Only Brownian motions and steric interception are accounted for as deposition mechanisms. Firstly pressure drop in each <span class="hlt">porous</span> medium is analyzed in order to determine an effective grain size, by fitting the results with the Ergun law. Then grid independence is assessed. Lastly, particle transport in the system is investigated via Eulerian steady-state simulations, where particle concentration is solved for, not following explicitly particles' trajectories, but solving the corresponding advection-diffusion equation. An assumption was made in considering favorable collector-particle interactions, resulting in a "perfect sink" boundary condition for the collectors. The gathered simulation data are used to calculate the deposition efficiency due to Brownian motions and steric interception. The original Levich law for one simple circular collector is verified; subsequently <span class="hlt">porous</span> media constituted by a packing of collectors are scrutinized. Results show that the interactions between the different collectors result in behaviors which are not in line with the theory developed by Happel and co-workers, highlighting a different dependency of the deposition efficiency on the dimensionless groups <span class="hlt">involved</span> in the relevant correlations.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014AGUFM.H13P..01O','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014AGUFM.H13P..01O"><span id="translatedtitle">Pore Scale View of Fluid Displacement Fronts in <span class="hlt">Porous</span> Media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Or, D.; Moebius, F.</p> <p>2014-12-01</p> <p>The macroscopically smooth and regular motion of fluid fronts in <span class="hlt">porous</span> media is composed of abrupt pore-scale interfacial jumps <span class="hlt">involving</span> intense interfacial energy release marked by pressure bursts and acoustic emissions. The characteristics of these pore scale events affect residual phase entrapment and the resulting unsaturated transport properties behind the front. Experimental studies using acoustic emissions technique (AE), rapid imaging, and pressure measurements help characterize pore scale processes during drainage and imbibition in model <span class="hlt">porous</span> media. Imbibition and drainage produce different AE signatures (obeying a power law). For rapid drainage, AE signals persist long after cessation of front motion indicative of redistribution and interfacial relaxation. Rapid imaging revealed that interfacial jumps exceed mean front velocity and are highly inertial (Re>1000). Imaged pore invasion volumes and pore volumes deduced from waiting times between pressure fluctuations were in remarkable agreement with geometric pores. Differences between invaded volumes and geometrical pores increase with increasing capillary numbers due to shorter pore evacuation times and onset of simultaneous invasion events. A new mechanistic model for interfacial motions through a pore-throat network enabled systematic evaluation of inertia in interfacial dynamics. Results suggest that in contrast to great sensitivity of pore scale dynamics to variations in pore geometry and boundary conditions, inertia exerts only a minor effect on average phase entrapment. Pore scale invasion events paint a complex picture of rapid and inertial motions and provide new insights on mechanisms at displacement fronts essential for improving the macroscopic description of multiphase flow in <span class="hlt">porous</span> media.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26422294','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26422294"><span id="translatedtitle">Development Trends in <span class="hlt">Porous</span> Adsorbents for Carbon Capture.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Sreenivasulu, Bolisetty; Sreedhar, Inkollu; Suresh, Pathi; Raghavan, Kondapuram Vijaya</p> <p>2015-11-01</p> <p>Accumulation of greenhouse gases especially CO2 in the atmosphere leading to global warming with undesirable climate changes has been a serious global concern. Major power generation in the world is from coal based power plants. Carbon capture through pre- and post- combustion technologies with various technical options like adsorption, absorption, membrane separations, and chemical looping combustion with and without oxygen uncoupling have received considerable attention of researchers, environmentalists and the stake holders. Carbon capture from flue gases can be achieved with micro and meso <span class="hlt">porous</span> adsorbents. This review covers carbonaceous (organic and metal organic frameworks) and noncarbonaceous (inorganic) <span class="hlt">porous</span> adsorbents for CO2 adsorption at different process conditions and pore sizes. Focus is also given to noncarbonaceous micro and meso <span class="hlt">porous</span> adsorbents in chemical looping combustion <span class="hlt">involving</span> insitu CO2 capture at high temperature (>400 °C). Adsorption mechanisms, material characteristics, and synthesis methods are discussed. Attention is given to isosteric heats and characterization techniques. The options to enhance the techno-economic viability of carbon capture techniques by integrating with CO2 utilization to produce industrially important chemicals like ammonia and urea are analyzed. From the reader's perspective, for different classes of materials, each section has been summarized in the form of tables or figures to get a quick glance of the developments.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25669275','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25669275"><span id="translatedtitle">Acoustics of <span class="hlt">porous</span> materials with partially opened porosity.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Leclaire, P; Dupont, T; Panneton, R</p> <p>2013-12-01</p> <p>A theoretical and experimental study of the acoustic properties of <span class="hlt">porous</span> materials containing dead-end (or partially opened) porosity was recently proposed by Dupont, Leclaire, Sicot, Gong, and Panneton [J. Appl. Phys. 110, 094903 (2011)]. The present article provides a description of partially opened porosity systems and their numerous potential applications in the general context of the study of <span class="hlt">porous</span> materials, the classical models describing them, and the characterization techniques. It is shown that the dead-end pore effect can be treated independently and that the description of this effect can be associated with any acoustic model of <span class="hlt">porous</span> media. Different theoretical developments describing the dead-end porosity effect are proposed. In particular, a model <span class="hlt">involving</span> the average effective length of the dead-end pores is presented. It is also shown that if the dead-end effect can be treated separately, the transfer matrix method is particularly well suited for the description of single or multilayer systems with dead-end porosity.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4752468','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4752468"><span id="translatedtitle">HMGB1 Is <span class="hlt">Involved</span> in IFN-α Production and TRAIL Expression by HIV-1-Exposed Plasmacytoid Dendritic Cells: <span class="hlt">Impact</span> of the Crosstalk with NK Cells</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Formaglio, Pauline; Melki, Marie-Thérèse; Charbit, Bruno; Herbeuval, Jean-Philippe; Gougeon, Marie-Lise</p> <p>2016-01-01</p> <p>Plasmacytoid dendritic cells (pDCs) are innate sensors of viral infections and important mediators of antiviral innate immunity through their ability to produce large amounts of IFN-α. Moreover, Toll-like receptor 7 (TLR7) and 9 (TLR9) ligands, such as HIV and CpG respectively, turn pDCs into TRAIL-expressing killer pDCs able to lyse HIV-infected CD4+ T cells. NK cells can regulate antiviral immunity by modulating pDC functions, and pDC production of IFN-α as well as cell–cell contact is required to promote NK cell functions. Impaired pDC-NK cell crosstalk was reported in the setting of HIV-1 infection, but the <span class="hlt">impact</span> of HIV-1 on TRAIL expression and innate antiviral immunity during this crosstalk is unknown. Here, we report that low concentrations of CCR5-tropic HIV-1Ba-L promote the release of pro-inflammatory cytokines such as IFN-α, TNF-α, IFN-γ and IL-12, and CCR5-interacting chemokines (MIP-1α and MIP-1β) in NK-pDCs co-cultures. At high HIV-1BaL concentrations, the addition of NK cells did not promote the release of these mediators, suggesting that once efficiently triggered by the virus, pDCs could not integrate new activating signals delivered by NK cells. However, high HIV-1BaL concentrations were required to trigger IFN-α-mediated TRAIL expression at the surface of both pDCs and NK cells during their crosstalk. Interestingly, we identified the alarmin HMGB1, released at pDC-NK cell synapse, as an essential trigger for the secretion of IFN-α and IFN-related soluble mediators during the interplay of HIV-1 exposed pDCs with NK cells. Moreover, HMGB1 was found crucial for mTRAIL translocation to the plasma membrane of both pDCs and NK cells during their crosstalk following pDC exposure to HIV-1. Data from serum analyses of circulating HMGB1, HMGB1-specific antibodies, sTRAIL and IP-10 in a cohort of 67 HIV-1+ patients argue for the in vivo relevance of these observations. Altogether, these findings identify HMGB1 as a trigger for IFN</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013EGUGA..1513748B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013EGUGA..1513748B"><span id="translatedtitle"><span class="hlt">Impact</span> of fracture stratigraphy on the paleohydrogeology of the Madison limestone in two basement <span class="hlt">involved</span> folds in the Bighorn Basin (Wyoming, USA)</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Barbier, Mickael; Leprêtre, Rémi; Hamon, Youri; Callot, Jean-Paul; Gasparrini, Marta; Daniel, Jean-Marc; Lacombe, Olivier</p> <p>2013-04-01</p> <p>Based on the study of the Madison Limestone at Sheep Mountain and Rattlesnake Mountain, a unique outcrop dataset including (1) facies and diagenenitc analyses, (2) vertical persistence and cement stratigraphy of vein sets and (3) fluid inclusions thermometry are used to demonstrate (i) the importance of the eo-diagenetic phases on reservoirs petrophysical and mechanical properties, and (ii) the <span class="hlt">impact</span> of folding and fracturing on paleo-hydrogeology. The different phases of porosity and permeability development of the carbonates of the Madison Limestone occurred mainly during the syn-depositional eogenesis, the postponed eogenesis (reflux of brine during LFS3) and during the karstification at the end of the Mississippian. The early sealing by the Amsden Formation during the Early Pennsylvanian, limited the vertical exchanges and initiated the confinement of the Madison "aquifer". The burial of the Madison Limestone leaded to the occlusion of the pore network due to the calcite cementation in the distal parts of the platform whereas it leaded to the pore network development due to the crystallization of dolomite in proximal parts. Quantification of the vertical persistence of fractures shows that Sheep Mountain and Rattlesnake Mountain differ by the vertical persistence of the pre-folding Laramide vein sets, which are strictly bed-confined in Sheep Mountain but cut across bedding at Rattlesnake Mountain, whereas the syn-folding veins are through-going in both. The emplacement chronology and the various sources of the fluids responsible for the paragenetic sequence are based on isotope chemistry and fluid inclusions analysis of the matrix and vein cements. At Sheep Mountain and Rattlesnake Mountain, the two cements related to the burial are characterized by isotopic signatures of marine formation waters that were diluted during the karstification of the Madison Platform at the end of Mississippian. Meteoric fluids, presumably migrating during the Cenomanian from Wind</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016EGUGA..18.3949B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016EGUGA..18.3949B"><span id="translatedtitle">Effect of sequential release of NAPLs on NAPL migration in <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Bang, Woohui; Yeo, In Wook</p> <p>2016-04-01</p> <p>NAPLs (Non-aqueous phase liquids) are common groundwater contaminants and are classified as LNAPLs (Light non-aqueous phase liquids) and DNAPLs (Dense non-aqueous phase liquids) according to relative density for water. Due to their low solubility in water, NAPLs remain for a long time in groundwater, and they pose a serious environmental problem. Therefore, understanding NAPLs migration in <span class="hlt">porous</span> media is essential for effective NAPLs remediation. DNAPLs tend to move downward through the water table by gravity force because its density is higher than water. However, if DNAPLs do not have sufficient energy which breaks capillary force of <span class="hlt">porous</span> media, they will just accumulate above capillary zone or water table. Mobile phase of LNAPLs rises and falls depending on fluctuation of water table, and it could change the wettability of <span class="hlt">porous</span> media from hydrophilic to hydrophobic. This could <span class="hlt">impacts</span> on the migration characteristics of subsequently-released DNAPLs. LNAPLs and DNAPLs are sometime disposed at the same place (for example, the Hill air force base, USA). Therefore, this study focuses on the effect of sequential release of NAPLs on NAPLs (in particular, DNAPL) migration in <span class="hlt">porous</span> media. We have conducted laboratory experiments. Gasoline, which is known to change wettability of <span class="hlt">porous</span> media from hydrophilic to intermediate, and TCE (Trichloroethylene) were used as LNAPL and DNAPL, respectively. Glass beads with the grain size of 1 mm and 2 mm were prepared for two sets of <span class="hlt">porous</span> media. Gasoline and TCE was dyed for visualization. First, respective LNAPL and DNAPL of 10 ml were separately released into prepared <span class="hlt">porous</span> media. For the grain size of 2 mm glass beads, LNAPL became buoyant above the water table, and DNAPL just moved downward through <span class="hlt">porous</span> media. However, for the experiment with the grain size of 1 mm glass beads, NAPLs behaved very differently. DNAPL did not migrate downward below and just remained above the water table due to capillary pressure of</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/1005634','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/1005634"><span id="translatedtitle">Measurement and Estimation of Organic-Liquid/Water Interfacial Areas for Several Natural <span class="hlt">Porous</span> Media</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Brusseau, M.L.; Narter, M.; Schnaar, G.; Marble, J.</p> <p>2009-06-01</p> <p>The objective of this study was to quantitatively characterize the <span class="hlt">impact</span> of <span class="hlt">porous</span>-medium texture on interfacial area between immiscible organic liquid and water residing within natural <span class="hlt">porous</span> media. Synchrotron X-ray microtomography was used to obtain high-resolution, three-dimensional images of solid and liquid phases in packed columns. The image data were processed to generate quantitative measurements of organic-liquid/water interfacial area and of organic-liquid blob sizes. Ten <span class="hlt">porous</span> media, comprising a range of median grain sizes, grain-size distributions, and geochemical properties, were used to evaluate the <span class="hlt">impact</span> of <span class="hlt">porous</span>-medium texture on interfacial area. The results show that fluid-normalized specific interfacial area (A{sub f}) and maximum specific interfacial area (A{sub m}) correlate very well to inverse median grain diameter. These functionalities were shown to result from a linear relationship between effective organic-liquid blob diameter and median grain diameter. These results provide the basis for a simple method for estimating specific organic-liquid/water interfacial area as a function of fluid saturation for a given <span class="hlt">porous</span> medium. The availability of a method for which the only parameter needed is the simple-to-measure median grain diameter should be of great utility for a variety of applications.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014APS..DFDM15007J','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014APS..DFDM15007J"><span id="translatedtitle">Drop Impingement Induced Dispersal of Microorganisms and Contaminants Within <span class="hlt">Porous</span> Media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Joung, Young Soo; Ge, Zhifei; Buie, Cullen</p> <p>2014-11-01</p> <p>We investigate migration of chemicals and microbes with aerosol generated by drop impingement on <span class="hlt">porous</span> media. In our previous work we found that aerosol generation from droplets hitting <span class="hlt">porous</span> media within a specific range of the Weber number (We) and a modified Pelect number (Pe). We and Pe reflect the <span class="hlt">impact</span> condition of droplets and the wetting properties of <span class="hlt">porous</span> media, respectively. The relationship between We and Pe can be expressed by a third dimensionless group, the Washburn Reynolds number (ReW = We/Pe). In a specific range of ReW, hundreds of aerosol particles can be generated within milliseconds of drop impingement. In this work we investigate if microbes such as Corynebacterium glutamicum, a soil bacterium, and chemicals such as Rhodamine B can be dispersed by aerosols generated from droplet <span class="hlt">impact</span>. Experimentally, C. glutamicum and Rhodamine B are permeated into <span class="hlt">porous</span> media. Then drop impingements are conducted on the <span class="hlt">porous</span> media with different We and Pe in an airflow tunnel. We quantitatively investigate the volume and speed of aerosol migration as a function of ReW of the drop impingement and Re of the airflow. Results of this study will shed light upon the dispersal of elemental compounds and microbes within soils due to aerosol generated by rainfall.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://ntrs.nasa.gov/search.jsp?R=20090024823&hterms=porous+material&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D90%26Ntt%3Dporous%2Bmaterial','NASA-TRS'); return false;" href="http://ntrs.nasa.gov/search.jsp?R=20090024823&hterms=porous+material&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D90%26Ntt%3Dporous%2Bmaterial"><span id="translatedtitle">Ballistic Performance of <span class="hlt">Porous</span>-Ceramic, Thermal-Protection-Systems</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Christiansen, E. L.; Davis, B. A.; Miller, J. E.; Bohl, W. E.; Foreman, C. D.</p> <p>2009-01-01</p> <p><span class="hlt">Porous</span>-ceramic, thermal protection systems are used heavily in current reentry vehicles like the Space Shuttle and are currently being proposed for the next generation of manned spacecraft, Orion. These materials insulate the structural components of a spacecraft against the intense thermal environments of atmospheric reentry. Furthermore, these materials are also highly exposed to space environmental hazards like meteoroid and orbital debris <span class="hlt">impacts</span>. This paper discusses recent <span class="hlt">impact</span> testing up to 9 km/s, and the findings of the influence of material equation-of-state on the simulation of the <span class="hlt">impact</span> event to characterize the ballistic performance of these materials. These results will be compared with heritage models1 for these materials developed from testing at lower velocities. Assessments of predicted spacecraft risk based upon these tests and simulations will also be discussed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012PhDT.......246T','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012PhDT.......246T"><span id="translatedtitle">Micro/macroscopic fluid flow in open cell fibrous structures and <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Tamayol, Ali</p> <p></p> <p>Fibrous <span class="hlt">porous</span> materials are <span class="hlt">involved</span> in a wide range of applications including composite fabrication, filtration, compact heat exchangers, fuel cell technology, and tissue engineering to name a few. Fibrous structures, such as metalfoams, have unique characteristics such as low weight, high porosity, high mechanical strength, and high surface to volume ratio. More importantly, in many applications the fibrous microstructures can be tailored to meet a range of requirements. Therefore, fibrous materials have the potential to be used in emerging sustainable energy conversion applications. The first step for analyzing transport phenomena in <span class="hlt">porous</span> materials is to determine the micro/macroscopic flow-field inside the medium. In applications where the <span class="hlt">porous</span> media is confined in a channel, the system performance is tightly related to the flow properties of the <span class="hlt">porous</span> medium and its interaction with the channel walls, i.e., macroscopic velocity distribution. Therefore, the focus of the study has been on: developing new mechanistic model(s) for determining permeability and inertial coefficient of fibrous <span class="hlt">porous</span> materials; investigating the effects of microstructural and mechanical parameters such as porosity, fiber orientation, mechanical compression, and fiber distribution on the flow properties and pressure drop of fibrous structures; determining the macroscopic flow-field in confined <span class="hlt">porous</span> media where the <span class="hlt">porous</span> structure fills the channel cross-section totally or partially. A systematic approach has been followed to study different aspects of the flow through fibrous materials. The complex microstructure of real materials has been modelled using unit cells that have been assumed to be repeated throughout the media. Implementing various exact and approximate analytical techniques such as integral technique, point matching, blending rules, and scale analysis the flow properties of such media have been modelled; the targeted properties include permeability and inertial</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/770682','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/770682"><span id="translatedtitle">Dynamic magnetic compaction of <span class="hlt">porous</span> materials</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p></p> <p>1998-10-29</p> <p>IAP Research began development of the Dynamic Magnetic Compaction (DMC) process three years before the CRADA was established. IAP Research had experimentally demonstrated the feasibility of the process, and conducted a basic market survey. IAP identified and opened discussions with industrial partners and established the basic commercial cost structure. The purpose of this CRADA project was to predict and verify optimum pressure vs. time history for the compaction of <span class="hlt">porous</span> copper and tungsten. LLNL modeled the rapid compaction of powdered material from an initial density of about 30% theoretical maximum to more than 90% theoretical maximum. The compaction simulations were benchmarked against existing data and new data was acquired by IAP Research. The modeling was used to perform parameter studies on the pressure loading time history, initial porosity and temperature. LLNL ran simulations using codes CALE or NITO and compared the simulations with published compaction data and equation of state (EOS) data. This project did not <span class="hlt">involve</span> the development or modification of software code. CALE and NITO were existing software programs at LLNL. No modification of these programs occurred within the scope of the CRADA effort.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3627417','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3627417"><span id="translatedtitle">BLOOD TRIGGERED RAPID RELEASE <span class="hlt">POROUS</span> NANOCAPSULES</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Gustafson, Tiffany P.; Dergunov, Sergey A.; Akers, Walter J.; Cao, Qian; Magalotti, Selena; Achilefu, Samuel; Pinkhassik, Eugene; Berezin, Mikhail Y.</p> <p>2013-01-01</p> <p>Rapid-release drug delivery systems present a new paradigm in emergency care treatments. Such systems combine a long shelf life with the ability to provide a significant dose of the drug to the bloodstream in the shortest period of time. Until now, development of delivery formulations has concentrated on slow release systems to ensure a steady concentration of the drug. To address the need for quick release system, we created hollow polyacrylate nanocapsules with nanometer-thin <span class="hlt">porous</span> walls. Burst release occurs upon interaction with blood components that leads to escape of the cargo. The likely mechanism of release <span class="hlt">involves</span> a conformational change of the polymer shell caused by binding albumin. To demonstrate this concept, a near-infrared fluorescent dye indocyanine green (ICG) was incorporated inside the nanocapsules. ICG-loaded nanocapsules demonstrated remarkable shelf life in aqueous buffers with no release of ICG for twelve months. Rapid release of the dye was demonstrated first in vitro using albumin solution and serum. SEM and light scattering analysis demonstrated the retention of the nanocapsule architecture after the release of the dye upon contact with albumin. In vivo studies using fluorescence lifetime imaging confirmed quick discharge of ICG from the nanocapsules following intravenous injection. PMID:23606942</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li class="active"><span>18</span></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_18 --> <div id="page_19" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li class="active"><span>19</span></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="361"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/27524071','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/27524071"><span id="translatedtitle">Engineered <span class="hlt">porous</span> scaffolds for periprosthetic infection prevention.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Iviglia, Giorgio; Cassinelli, Clara; Bollati, Daniele; Baino, Francesco; Torre, Elisa; Morra, Marco; Vitale-Brovarone, Chiara</p> <p>2016-11-01</p> <p>Periprosthetic infection is a consequence of implant insertion procedures and strategies for its prevention <span class="hlt">involve</span> either an increase in the rate of new bone formation or the release of antibiotics such as vancomycin. In this work we combined both strategies and developed a novel, multifunctional three-dimensional <span class="hlt">porous</span> scaffold that was produced using hydroxyapatite (HA) and β-tricalcium phosphate (β-TCP), coupled with a pectin (PEC)-chitosan (CHIT) polyelectrolyte (PEI), and loaded with vancomycin (VCA). By this approach, a controlled vancomycin release was achieved and serial bacterial dilution test demonstrated that, after 1week, the engineered construct still inhibits the bacterial growth. Degradation tests show an excellent behavior in a physiological and acidic environment (<10% of mass loss). Furthermore, the PEI coating shows an anti-inflammatory response, and good cell proliferation and migration were demonstrated in vitro using osteoblast SAOS-2 cell line. This new engineered construct exhibits excellent properties both as an antibacterial material and as a stimulator of bone formation, which makes it a good candidate to contrast periprosthetic infection. PMID:27524071</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/948405','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/948405"><span id="translatedtitle">Evaluation of Sampling Tools for Environmental Sampling of Bacterial Endospores from <span class="hlt">Porous</span> and Non-<span class="hlt">porous</span> Surfaces</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Valentine, Nancy B.; Butcher, Mark G.; Su, Yin-Fong; Jarman, Kristin H.; Matzke, Melissa M.; Webb-Robertson, Bobbie-Jo M.; Panisko, Ellen A.; Seiders, Barbara AB; Wahl, Karen L.</p> <p>2008-03-08</p> <p>Aims: Having and executing a well-defined and validated sampling protocol is critical following a purposeful release of a biological agent for response and recovery activities, for clinical and epidemiological analysis and for forensic purposes. The objective of this study was to address the need for validated sampling and analysis methods called out by the General Accounting Office and others to systematically compare the collection efficiency of various swabs and wipes for collection of bacterial endospores from five different surfaces, both <span class="hlt">porous</span> and non-<span class="hlt">porous</span>. This study was also designed to test the collection and extraction solutions used for endospore recovery from swabs and wipes. Methods and Results: Eight collection tools were used, five swabs and three wipes. Three collection/preservation solutions were evaluated: sterile E-pure® water, phosphate buffered saline (PBS), and phosphate buffered saline with 0.3% Tween (PBST). An Ink Jet Aerosol Generator (IJAG) was used to apply Bacillus subtilis endospores to five <span class="hlt">porous</span> and non-<span class="hlt">porous</span> surfaces. The collection efficiencies of the swabs and wipes were compared using a statistical multiple comparison analysis. Results indicated that wipes tend to have higher collection efficiency than swabs. Of the swabs tested, the recovery from most of the surfaces was highest with the polyurethane foam swab. Conclusions: The ScottPure® wipe had the highest collection efficiency and PBST was the best collection solution of those tested. Significance and <span class="hlt">Impact</span> of Study: Validated sampling for potential biological warfare is of significant importance and this study answered some relevant questions.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26583741','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26583741"><span id="translatedtitle">Evaluation of a numerical simulation model for a system coupling atmospheric gas, surface water and unsaturated or saturated <span class="hlt">porous</span> medium.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Hibi, Yoshihiko; Tomigashi, Akira; Hirose, Masafumi</p> <p>2015-12-01</p> <p>Numerical simulations that couple flow in a surface fluid with that in a <span class="hlt">porous</span> medium are useful for examining problems of pollution that <span class="hlt">involve</span> interactions among the atmosphere, surface water and groundwater, including, for example, saltwater intrusion along coasts. We previously developed a numerical simulation method for simulating a coupled atmospheric gas, surface water, and groundwater system (called the ASG method) that employs a saturation equation for flow in a <span class="hlt">porous</span> medium; this equation allows both the void fraction of water in the surface system and water saturation in the <span class="hlt">porous</span> medium to be solved simultaneously. It remained necessary, however, to evaluate how global pressure, including gas pressure, water pressure, and capillary pressure, should be specified at the boundary between the surface and the <span class="hlt">porous</span> medium. Therefore, in this study, we derived a new equation for global pressure and integrated it into the ASG method. We then simulated water saturation in a <span class="hlt">porous</span> medium and the void fraction of water in a surface system by the ASG method and reproduced fairly well the results of two column experiments. Next, we simulated water saturation in a <span class="hlt">porous</span> medium (sand) with a bank, by using both the ASG method and a modified Picard (MP) method. We found only a slight difference in water saturation between the ASG and MP simulations. This result confirmed that the derived equation for global pressure was valid for a <span class="hlt">porous</span> medium, and that the global pressure value could thus be used with the saturation equation for <span class="hlt">porous</span> media. Finally, we used the ASG method to simulate a system coupling atmosphere, surface water, and a <span class="hlt">porous</span> medium (110m wide and 50m high) with a trapezoidal bank. The ASG method was able to simulate the complex flow of fluids in this system and the interaction between the <span class="hlt">porous</span> medium and the surface water or the atmosphere.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015JCHyd.183..121H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015JCHyd.183..121H"><span id="translatedtitle">Evaluation of a numerical simulation model for a system coupling atmospheric gas, surface water and unsaturated or saturated <span class="hlt">porous</span> medium</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Hibi, Yoshihiko; Tomigashi, Akira; Hirose, Masafumi</p> <p>2015-12-01</p> <p>Numerical simulations that couple flow in a surface fluid with that in a <span class="hlt">porous</span> medium are useful for examining problems of pollution that <span class="hlt">involve</span> interactions among the atmosphere, surface water and groundwater, including, for example, saltwater intrusion along coasts. We previously developed a numerical simulation method for simulating a coupled atmospheric gas, surface water, and groundwater system (called the ASG method) that employs a saturation equation for flow in a <span class="hlt">porous</span> medium; this equation allows both the void fraction of water in the surface system and water saturation in the <span class="hlt">porous</span> medium to be solved simultaneously. It remained necessary, however, to evaluate how global pressure, including gas pressure, water pressure, and capillary pressure, should be specified at the boundary between the surface and the <span class="hlt">porous</span> medium. Therefore, in this study, we derived a new equation for global pressure and integrated it into the ASG method. We then simulated water saturation in a <span class="hlt">porous</span> medium and the void fraction of water in a surface system by the ASG method and reproduced fairly well the results of two column experiments. Next, we simulated water saturation in a <span class="hlt">porous</span> medium (sand) with a bank, by using both the ASG method and a modified Picard (MP) method. We found only a slight difference in water saturation between the ASG and MP simulations. This result confirmed that the derived equation for global pressure was valid for a <span class="hlt">porous</span> medium, and that the global pressure value could thus be used with the saturation equation for <span class="hlt">porous</span> media. Finally, we used the ASG method to simulate a system coupling atmosphere, surface water, and a <span class="hlt">porous</span> medium (110 m wide and 50 m high) with a trapezoidal bank. The ASG method was able to simulate the complex flow of fluids in this system and the interaction between the <span class="hlt">porous</span> medium and the surface water or the atmosphere.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016DPS....4831812Y','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016DPS....4831812Y"><span id="translatedtitle">Effect of oblique <span class="hlt">impact</span> on <span class="hlt">impact</span> strength of planetesimals</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Yasui, Minami; Yoshida, Yusaku; Matsue, Kazuma; Takano, Shota; Arakawa, Masahiko; Ogawa, Kazunori; Okamoto, Chisato</p> <p>2016-10-01</p> <p>Collisional processes among planetesimals have played an important role for the formation and the evolution of the bodies in the solar system. Some researchers conducted <span class="hlt">impact</span> experiments to examine the effects of target material, <span class="hlt">impact</span> velocity, etc., on the <span class="hlt">impact</span> strength. Planetesimals could collide with each other at various <span class="hlt">impact</span> angles. Therefore, the effect of <span class="hlt">impact</span> angle on the <span class="hlt">impact</span> strength should be examined, but there are only a few studies about oblique <span class="hlt">impact</span> experiments. In this study, we conducted oblique <span class="hlt">impact</span> experiments of <span class="hlt">porous</span> gypsum and glass spheres simulating planetesimals and examined the effect of the <span class="hlt">impact</span> angle on the <span class="hlt">impact</span> strength.We used a <span class="hlt">porous</span> gypsum sphere and a glass sphere as a target. We carried out <span class="hlt">impact</span> experiments by using two-stage H2 gas gun at Kobe University. A polycarbonate spherical projectile was accelerated at 2 to 7 km/s. The <span class="hlt">impact</span> angle, θ, changed from 10° to 90° (90° at a head-on <span class="hlt">impact</span>). The <span class="hlt">impact</span> phenomena were observed by a high-speed camera to measure the fragment velocities.The <span class="hlt">impact</span> strength Q* is defined as an energy density Q, which is the kinetic energy of impactor normalized by the target mass, when the largest fragment mass is half of the original target mass. In both cases of <span class="hlt">porous</span> gypsum and glass targets, the Q* became larger as the θ decreased. We reanalyzed our results by using the effective energy density, Qc*, defined as Qsin2θ and we found that the results of oblique <span class="hlt">impacts</span> matched with those of a head-on <span class="hlt">impact</span>. Furthermore, the relationship between the Qc and the normalized largest fragment mass, ml/Mt, could be fitted by ml/Mt=A×Qc-p and the parameters, A and p, were 82.2 and 0.72 for a <span class="hlt">porous</span> gypsum target and 1.1×106 and 2.12 for a glass target, respectively. We defined the <span class="hlt">impact</span> strength Qc* by using the Qc, and the Qc* was about 1000 J/kg for both targets. The power p for a glass target was about 3 times larger than that for a <span class="hlt">porous</span> gypsum target. This means</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/866190','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/866190"><span id="translatedtitle">Method of preparing thin <span class="hlt">porous</span> sheets of ceramic material</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Swarr, Thomas E.; Nickols, Richard C.; Krasij, Myron</p> <p>1987-03-24</p> <p>A method of forming thin <span class="hlt">porous</span> sheets of ceramic material for use as electrodes or other components in a molten carbonate fuel cell is disclosed. The method <span class="hlt">involves</span> spray drying a slurry of fine ceramic particles in liquid carrier to produce generally spherical agglomerates of high porosity and a rough surface texture. The ceramic particles may include the electrode catalyst and the agglomerates can be calcined to improve mechanical strength. After slurrying with suitable volatile material and binder tape casting is used to form sheets that are sufficiently strong for further processing and handling in the assembly of a high temperature fuel cell.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/6256776','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/biblio/6256776"><span id="translatedtitle">Method of preparing thin <span class="hlt">porous</span> sheets of ceramic material</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Swarr, T.E.; Nickols, R.C.; Krasij, M.</p> <p>1984-05-23</p> <p>A method of forming thin <span class="hlt">porous</span> sheets of ceramic material for use as electrodes or other components in a molten carbonate fuel cell is disclosed. The method <span class="hlt">involves</span> spray drying a slurry of fine ceramic particles in liquid carrier to produce generally spherical agglomerates of high porosity and a rough surface texture. The ceramic particles may include the electrode catalyst and the agglomerates can be calcined to improve mechanical strength. After slurrying with suitable volatile material and binder tape casting is used to form sheets that are sufficiently strong for further processing and handling in the assembly of a high temperature fuel cell.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED094863.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED094863.pdf"><span id="translatedtitle">Evaluating Parent <span class="hlt">Involvement</span>. Issue Paper No. 1.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Safran, Daniel</p> <p></p> <p>This paper poses a series of questions to assist programs in deciding what it is about parent <span class="hlt">involvement</span> that they wish to evaluate. The questions focus on the nature of parent <span class="hlt">involvement</span>, why parent <span class="hlt">involvement</span> is needed, and what evaluation of parent <span class="hlt">involvement</span> should include. A conceptual framework for research on the <span class="hlt">impact</span> of parent…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=71493&keyword=physical+AND+modeling+AND+hydraulic&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50&CFID=70299272&CFTOKEN=60237992','EPA-EIMS'); return false;" href="http://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=71493&keyword=physical+AND+modeling+AND+hydraulic&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50&CFID=70299272&CFTOKEN=60237992"><span id="translatedtitle">VIRUS TRANSPORT IN PHYSICALLY AND GEOCHEMICALLY HETEROGENEOUS SUBSURFACE <span class="hlt">POROUS</span> MEDIA. (R826179)</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p><p>A two-dimensional model for virus transport in physically and geochemically heterogeneous subsurface <span class="hlt">porous</span> media is presented. The model <span class="hlt">involves</span> solution of the advection–dispersion equation, which additionally considers virus inactivation in the solution, as well as ...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1016458','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1016458"><span id="translatedtitle">Foam Transport in <span class="hlt">Porous</span> Media - A Review</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Zhang, Z. F.; Freedman, Vicky L.; Zhong, Lirong</p> <p>2009-11-11</p> <p> transport of foam in <span class="hlt">porous</span> media is complicated in that the number of lamellae present governs flow characteristics such as viscosity, relative permeability, fluid distribution, and interactions between fluids. Hence, foam is a non-Newtonian fluid. During transport, foam destruction and formation occur. The net result of the two processes determines the foam texture (i.e., bubble density). Some of the foam may be trapped during transport. According to the <span class="hlt">impacts</span> of the aqueous and gas flow rates, foam flow generally has two regimes – weak and strong foam. There is also a minimum pressure gradient to initiate foam flow and a critical capillary for foam to be sustained. Similar to other fluids, the transport of foam is described by Darcy’s law with the exception that the foam viscosity is variable. Three major approaches to modeling foam transport in <span class="hlt">porous</span> media are the empirical, semi-empirical, and mechanistic methods. Mechanistic approaches can be complete in principal but may be difficult to obtain reliable parameters, whereas empirical and semi-empirical approaches can be limited by the detail used to describe foam rheology and mobility. Mechanistic approaches include the bubble population-balance model, the network/percolation theory, the catastrophe theory, and the filtration theory. Among these methods, all were developed for modeling polyhedral foam with the exception that the method based on the filtration theory was for the ball foam (microfoam).</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009JMEP...18..765M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009JMEP...18..765M"><span id="translatedtitle">Enhanced Biocompatibility of <span class="hlt">Porous</span> Nitinol</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Munroe, Norman; Pulletikurthi, Chandan; Haider, Waseem</p> <p>2009-08-01</p> <p><span class="hlt">Porous</span> Nitinol (PNT) has found vast applications in the medical industry as interbody fusion devices, synthetic bone grafts, etc. However, the tendency of the PNT to corrode is anticipated to be greater as compared to solid nitinol since there is a larger surface area in contact with body fluids. In such cases, surface preparation is known to play a major role in a material’s biocompatibility. In an effort to check the effect of surface treatments on the in vitro corrosion properties of PNT, in this investigation, they were subjected to different surface treatments such as boiling in water, dry heating, and passivation. The localized corrosion resistance of alloys before and after each treatment was evaluated in phosphate buffer saline solution (PBS) using cyclic polarization tests in accordance with ASTM F 2129-08.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2772207','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2772207"><span id="translatedtitle">Enhanced Biocompatibility of <span class="hlt">Porous</span> Nitinol</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Munroe, Norman; Pulletikurthi, Chandan; Haider, Waseem</p> <p>2009-01-01</p> <p><span class="hlt">Porous</span> Nitinol (PNT) has found vast applications in the medical industry as interbody fusion devices, synthetic bone grafts, etc. However, the tendency of the PNT to corrode is anticipated to be greater as compared to solid nitinol since there is a larger surface area in contact with body fluids. In such cases, surface preparation is known to play a major role in a material’s biocompatibility. In an effort to check the effect of surface treatments on the in vitro corrosion properties of PNT, in this investigation, they were subjected to different surface treatments such as boiling in water, dry heating, and passivation. The localized corrosion resistance of alloys before and after each treatment was evaluated in phosphate buffer saline solution (PBS) using cyclic polarization tests in accordance with ASTM F 2129-08. PMID:19956797</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1998PhDT.......116R','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1998PhDT.......116R"><span id="translatedtitle">Nonlinear flow in <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Rojas, Sergio Jesus</p> <p>1998-07-01</p> <p>Numerical solutions of the Navier-Stokes equations in two-dimensional quasi-periodic and quasi-isotropic random media were obtained to analyze the local and large scale aspects of finite Reynolds number flow. For Reynolds number less than one, the results show a first correction to Darcy's law which is cubic in the Darcy (averaged) velocity, while for Reynolds number greater than one, the results are in agreement with Forchheimer equation. That is, the correction to Darcy's law is quadratic in the average (Darcy) velocity. The cubic correction to Darcy's law support Mei and Auriault's (1991) theoretical study, based on homogenization theory. In addition, the results show support to a unifying empirical equation describing fluid flow in <span class="hlt">porous</span> media of similar structure, first proposed by Beavers and Sparrow (1969). Also, the results show agreement, except by a multiplicative constant, with Sangani and Acrivos (1982) equation for the drag on dilute array of cylinders.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/18447537','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/18447537"><span id="translatedtitle">A new stereolithography experimental <span class="hlt">porous</span> flow device.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Crandall, Dustin; Ahmadi, Goodarz; Leonard, Douglas; Ferer, Martin; Smith, Duane H</p> <p>2008-04-01</p> <p>A new method for constructing laboratory-scale <span class="hlt">porous</span> media with increased pore-level variabilities for two-phase flow experiments is presented here. These devices have been created with stereolithography directly on glass, thus improving the stability of the model created with this precision rapid construction technique. The method of construction and improved parameters are discussed in detail, followed by a brief comparison of two-phase drainage results for air invasion into the water-saturated <span class="hlt">porous</span> medium. Flow through the model <span class="hlt">porous</span> medium is shown to substantiate theoretical fractal predictions.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/11543122','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/11543122"><span id="translatedtitle">Comets as <span class="hlt">porous</span> aggregates of interstellar dust.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Greenberg, J M; Remo, J L</p> <p>1997-05-30</p> <p>A comet model is derived based on the interstellar dust chemical composition in dense molecular and diffuse clouds resulting from their subsequent chemical interactions and UV photoprocessing. The collapsing presolar nebula leads to a <span class="hlt">porous</span> aggregate model for comet nuclei, from which is derived certain physical properties that include thermal conductivity and tensile strength. The <span class="hlt">porous</span> morphological structure is also shown to imply anomalous (expansion rather than contraction) behavior when subjected to strong shock waves, which is supported by recent shock experiments on (<span class="hlt">porous</span>) carbonaceous chondrite material.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/4139336','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/biblio/4139336"><span id="translatedtitle">METHOD OF IMPREGNATING A <span class="hlt">POROUS</span> MATERIAL</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Steele, G.N.</p> <p>1960-06-01</p> <p>A method of impregnating a <span class="hlt">porous</span> body with an inorganic uranium- containing salt is outlined and comprises dissolving a water-soluble uranium- containing salt in water; saturating the intercommunicating pores of the <span class="hlt">porous</span> body with the salt solution; infusing ammonia gas into the intercommunicating pores of the body, the ammonia gas in water chemically reacting with the water- soluble uranium-containing salt in the water solvent to form a nonwater-soluble uranium-containing precipitant; and evaporating the volatile unprecipitated products from the intercommunicating pores whereby the uranium-containing precipitate is uniformly distributed in the intercommunicating peres of the <span class="hlt">porous</span> body.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/10115127','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/10115127"><span id="translatedtitle">Silicon micromachining based on <span class="hlt">porous</span> silicon formation</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Guilinger, T.R.; Kelly, M.J.; Stevenson, J.O.; Howard, A.; Houston, J.E.; Tsao, S.S.</p> <p>1991-12-31</p> <p>We describe a new electrochemical processing technique based on <span class="hlt">porous</span> silicon formation that can produce surface and buried insulators, conductors, and sacrificial layers required for silicon micromachining to fabricate micromechanical devices and sensors. Porosity and thickness of <span class="hlt">porous</span> silicon layers for micromachining can be controlled to a relative precision better than 0.3% for porosities ranging from 20--80% and thicknesses ranging from sub- micron to hundreds of microns. The technique of using <span class="hlt">porous</span> silicon has important implications for microfabrication of silicon electromechanical devices and sensors. The high relative precision in realizing a given thickness is superior to that obtained with conventional chemical etches. 8 refs.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/5947363','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/5947363"><span id="translatedtitle">Silicon micromachining based on <span class="hlt">porous</span> silicon formation</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Guilinger, T.R.; Kelly, M.J.; Stevenson, J.O.; Howard, A.; Houston, J.E.; Tsao, S.S.</p> <p>1991-01-01</p> <p>We describe a new electrochemical processing technique based on <span class="hlt">porous</span> silicon formation that can produce surface and buried insulators, conductors, and sacrificial layers required for silicon micromachining to fabricate micromechanical devices and sensors. Porosity and thickness of <span class="hlt">porous</span> silicon layers for micromachining can be controlled to a relative precision better than 0.3% for porosities ranging from 20--80% and thicknesses ranging from sub- micron to hundreds of microns. The technique of using <span class="hlt">porous</span> silicon has important implications for microfabrication of silicon electromechanical devices and sensors. The high relative precision in realizing a given thickness is superior to that obtained with conventional chemical etches. 8 refs.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/27377976','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/27377976"><span id="translatedtitle">Enzymatic Biofuel Cells on <span class="hlt">Porous</span> Nanostructures.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wen, Dan; Eychmüller, Alexander</p> <p>2016-09-01</p> <p>Biofuel cells (BFCs) that utilize enzymes as catalysts represent a new sustainable and renewable energy technology. Numerous efforts have been directed to improve the performance of the enzymatic BFCs (EBFCs) with respect to power output and operational stability for further applications in portable power sources, self-powered electrochemical sensing, implantable medical devices, etc. The latest advances in EBFCs based on <span class="hlt">porous</span> nanoarchitectures over the past 5 years are detailed here. <span class="hlt">Porous</span> matrices from carbon, noble metals, and polymers promote the development of EBFCs through the electron transfer and mass transport benefits. Some key issues regarding how these nanostructured <span class="hlt">porous</span> media improve the performance of EBFCs are also discussed. PMID:27377976</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23486830','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23486830"><span id="translatedtitle"><span class="hlt">Porous</span> silicene as a hydrogen purification membrane.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Hu, Wei; Wu, Xiaojun; Li, Zhenyu; Yang, Jinlong</p> <p>2013-04-28</p> <p>We investigated theoretically the hydrogen permeability and selectivity of a <span class="hlt">porous</span> silicene membrane via first-principles calculations. The subnanometer pores of the silicene membrane are designed as divacancy defects with octagonal and pentagonal rings (585-divacancy). The <span class="hlt">porous</span> silicene exhibits high selectivity comparable with graphene-based membranes for hydrogen over various gas molecules (N2, CO, CO2, CH4, and H2O). The divacancy defects in silicene are chemically inert to the considered gas molecules. Our results suggest that the <span class="hlt">porous</span> silicene membrane is expected to find great potential in gas separation and filtering applications.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li class="active"><span>19</span></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_19 --> <div id="page_20" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li class="active"><span>20</span></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="381"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016EGUGA..1810215B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016EGUGA..1810215B"><span id="translatedtitle">Dynamics of water evaporation from saline <span class="hlt">porous</span> media with mixed wettability</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Bergstad, Mina; Shokri, Nima</p> <p>2016-04-01</p> <p>Understanding of the dynamics of salt transport and precipitation in <span class="hlt">porous</span> media during evaporation is of crucial concern in various environmental and hydrological applications such as soil salinization, rock weathering, terrestrial ecosystem functioning, microbiological activities and biodiversity in vadose zone. Vegetation, plant growth and soil organisms can be severely limited in salt-affected land. This process is influenced by the complex interaction among atmospheric conditions, transport properties of <span class="hlt">porous</span> media and properties of the evaporating solution (1-5). We investigated effects of mixed wettability conditions on salt precipitation during evaporation from saline <span class="hlt">porous</span> media. To do so, we conducted a series of evaporation experiments with sand mixtures containing different fractions of hydrophobic grains saturated with NaCl solutions. The dynamics of salt precipitation at the surface of sand columns (mounted on digital balances to record the evaporation curves) as well as the displacement of the receding drying front (the interface between wet and partially wet zone) were recorded using an automatic imaging system at well-defined time intervals. The experiments were conducted with sand packs containing 0, 25, 40, 50, 65, and 80% fraction of hydrophobic grains. All experiments were conducted in an environmental chamber in which the relative humidity and ambient temperature were kept constant at 30% and 30 C, respectively. Our results show that partial wettability conditions had minor <span class="hlt">impacts</span> on the evaporative mass losses from saline sand packs due to the presence of salt. This is significantly different than what is normally observed during evaporation from mixed wettability <span class="hlt">porous</span> media saturated with pure water (6). In our experiments, increasing the fraction of hydrophobic grains did not result in any notable reduction of the evaporative mass losses from saline <span class="hlt">porous</span> media. Our results show that the presence of hydrophobic grains on the surface</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009PhDT........77N&link_type=ABSTRACT','NASAADS'); return false;" href="http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009PhDT........77N&link_type=ABSTRACT"><span id="translatedtitle">Computational characterization of diffusive mass transfer in <span class="hlt">porous</span> solid oxide fuel cell components</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Nelson, George J.</p> <p></p> <p>Diffusive mass transport within <span class="hlt">porous</span> SOFC components is explored using two modeling approaches that can better inform the SOFC electrode design process. These approaches include performance metrics for electrode cross-sectional design and a fractal approach for modeling mass transport within the pore structure of the electrode reaction zone. The performance metrics presented are based on existing analytical models for transport within SOFC electrodes. These metrics include a correction factor for button-cell partial pressure predictions and two forms of dimensionless reactant depletion current density. The performance <span class="hlt">impacts</span> of multi-dimensional transport phenomena are addressed through the development of design maps that capture the trade-offs inherent in the reduction of mass transport losses within SOFC electrode cross-sections. As a complement to these bulk electrode models, a fractal model is presented for modeling diffusion within the electrochemically active region of an SOFC electrode. The <span class="hlt">porous</span> electrode is separated into bulk and reaction zone regions, with the bulk electrode modeled in one-dimension based on the dusty-gas formalism. The reaction zone is modeled in detail with a two-dimensional finite element model using a regular Koch pore cross-section as a fractal template for the pore structure. Drawing on concepts from the analysis of <span class="hlt">porous</span> catalysts, this model leads to a straightforward means of assessing the performance <span class="hlt">impacts</span> of reaction zone microstructure. Together, the modeling approaches presented provide key insights into the <span class="hlt">impacts</span> of bulk and microstructural geometry on the performance of <span class="hlt">porous</span> SOFC components.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015Geomo.228..608Z','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015Geomo.228..608Z"><span id="translatedtitle">Trajectories of saltating sand particles behind a <span class="hlt">porous</span> fence</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Zhang, Ning; Lee, Sang Joon; Chen, Ting-Guo</p> <p>2015-01-01</p> <p>Trajectories of aeolian sand particles behind a <span class="hlt">porous</span> wind fence embedded in a simulated atmospheric boundary layer were visualized experimentally, to investigate the shelter effect of the fence on sand saltation. Two sand samples, one collected from a beach (d = 250 μm) and the other from a desert (d = 100 μm), were tested in comparison with the previous studies of a 'no-fence' case. A wind fence (ε = 38.5%) was installed on a flat sand bed filled with each sand sample. A high-speed photography technique and the particle tracking velocimetry (PTV) method were employed to reconstruct the trajectories of particles saltating behind the fence. The collision processes of these sand particles were analyzed, momentum and kinetic energy transfer between saltating particles and ground surface were also investigated. In the wake region, probability density distributions of the <span class="hlt">impact</span> velocities agree well with the pattern of no-fence case, and can be explained by a log-normal law. The horizontal component of <span class="hlt">impact</span> velocity for the beach sand is decreased by about 54%, and about 76% for the desert sand. Vertical restitution coefficients of bouncing particles are smaller than 1.0 due to the presence of the wind fence. The saltating particles lose a large proportion of their energy during the collision process. These results illustrate that the <span class="hlt">porous</span> wind fence effectively abates the further evolution of saltating sand particles.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/19475967','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/19475967"><span id="translatedtitle">Quantifying volatile organic compounds in <span class="hlt">porous</span> media: effects of sampling method attributes, contaminant characteristics and environmental conditions.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Oesterreich, Ryan C; Siegrist, Robert L</p> <p>2009-04-15</p> <p>Understanding how sampling methods can <span class="hlt">impact</span> the accuracy of volatile organic compound (VOC) measurements in samples of soil and subsurface <span class="hlt">porous</span> media is often critical to sound decision making during characterization and remediation of VOC contaminated sites. In this study, the accuracy of VOC measurements was investigated using an experimental apparatus packed with sandy <span class="hlt">porous</span> media and contaminated with known levels of VOCs, which could be sampled using different methods under variable, but controlled, conditions. Five sampling methods were examined representing different degrees of <span class="hlt">porous</span> media disaggregation and duration of atmospheric exposure (MDE) that can occur during sample acquisition and preservation in the field. Three pervasive VOCs were studied (1,1,1-trichloroethane, trichloroethylene, tetrachloroethylene) at low and high concentration levels. Five <span class="hlt">porous</span> media temperatures were examined ranging from 5 to 80 degrees C to represent ambient or thermal remediation conditions and two water saturation levels were used to mimic vadose zone and groundwater zone conditions. The results of this research demonstrated that sampling method attributes can <span class="hlt">impact</span> the accuracy of VOC measurements in <span class="hlt">porous</span> media by causing negative bias in VOC concentration data ranging from near 0 to 90% or more. The magnitude of the negative bias is dependent on the attributes of the sampling method used (i.e., level of MDE) and interactions with key contaminant properties and environmental conditions (i.e., VOC KH, <span class="hlt">porous</span> media temperature, water saturation level).</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016JPhD...49F5301J','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016JPhD...49F5301J"><span id="translatedtitle">Enhancement of a dynamic <span class="hlt">porous</span> model considering compression-release hysteresis behavior: application to graphite</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Jodar, B.; Seisson, G.; Hébert, D.; Bertron, I.; Boustie, M.; Berthe, L.</p> <p>2016-08-01</p> <p>Because of their shock wave attenuation properties, <span class="hlt">porous</span> materials and foams are increasingly used for various applications such as graphite in the aerospace industry and polyurethane (PU) foams in biomedical engineering. For these two materials, the absence of residual compaction after compression and release cycles limits the efficiency of the usual numerical dynamic <span class="hlt">porous</span> models such as P-α and POREQST. In this paper, we suggest a simple enhancement of the latter in order to take into account the compression-release hysteresis behavior experimentally observed for the considered materials. The new model, named H-POREQST, was implemented into a Lagrangian hydrocode and tested for simulating plate <span class="hlt">impact</span> experiments at moderate pressure onto a commercial grade of <span class="hlt">porous</span> graphite (EDM3). It proved to be in far better agreement with experimental data than the original model which encourages us to pursue numerical tests and developments.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/10117349','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/10117349"><span id="translatedtitle">Multiphase flow in fractured <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Firoozabadi, A.</p> <p>1995-02-01</p> <p>The major goal of this research project was to improve the understanding of the gas-oil two-phase flow in fractured <span class="hlt">porous</span> media. In addition, miscible displacement was studied to evaluate its promise for enhanced recovery.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20050160254','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20050160254"><span id="translatedtitle">Drag Measurements of <span class="hlt">Porous</span> Plate Acoustic Liners</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Wolter, John D.</p> <p>2005-01-01</p> <p>This paper presents the results of direct drag measurements on a variety of <span class="hlt">porous</span> plate acoustic liners. The existing literature describes numerous studies of drag on <span class="hlt">porous</span> walls with injection or suction, but relatively few of drag on <span class="hlt">porous</span> plates with neither injection nor suction. Furthermore, the porosity of the <span class="hlt">porous</span> plate in existing studies is much lower than typically used in acoustic liners. In the present work, the acoustic liners consisted of a perforated face sheet covering a bulk acoustic absorber material. Factors that were varied in the experiment were hole diameter, hole pattern, face sheet thickness, bulk material type, and size of the gap (if any) between the face sheet and the absorber material.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/12075343','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/12075343"><span id="translatedtitle">Ordered <span class="hlt">porous</span> materials for emerging applications.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Davis, Mark E</p> <p>2002-06-20</p> <p>"Space--the final frontier." This preamble to a well-known television series captures the challenge encountered not only in space travel adventures, but also in the field of <span class="hlt">porous</span> materials, which aims to control the size, shape and uniformity of the <span class="hlt">porous</span> space and the atoms and molecules that define it. The past decade has seen significant advances in the ability to fabricate new <span class="hlt">porous</span> solids with ordered structures from a wide range of different materials. This has resulted in materials with unusual properties and broadened their application range beyond the traditional use as catalysts and adsorbents. In fact, <span class="hlt">porous</span> materials now seem set to contribute to developments in areas ranging from microelectronics to medical diagnosis.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/21294739','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/21294739"><span id="translatedtitle"><span class="hlt">Porous</span> Matrixes for Immobilization of Radioactive Wastes</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Ershov, B.G.; Minaev, A.A.; Afonin, M.M.; Kuznetsov, D.G.</p> <p>2007-07-01</p> <p>The process was studied and the technology developed to obtain a highly <span class="hlt">porous</span> coke based material with the solid dispersed filler (zirconium dioxide); properties and technological characteristics of the material were investigated. Technological process was developed for the fabrication of products out of the highly <span class="hlt">porous</span> high melting compound (zirconium carbide). Technology for the fabrication of products out of the highly <span class="hlt">porous</span> high melting compound bypassing the necessity of obtaining the dry radioactive feed powders and allows producing the material with a wide range of compositions and properties. In this paper we describe a technological process for the fabrication of materials, assuming the impregnation of a <span class="hlt">porous</span> zirconium carbide form by the liquid highly concentrated solution of actinides followed by the decomposition of the obtained product during the thermal treatment to form stable oxides. We are investigating the properties of the final form as a possible target in a nuclear reactors to use neutrons to burn up the actinides. (authors)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22990753','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22990753"><span id="translatedtitle">Methane storage in advanced <span class="hlt">porous</span> materials.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Makal, Trevor A; Li, Jian-Rong; Lu, Weigang; Zhou, Hong-Cai</p> <p>2012-12-01</p> <p>The need for alternative fuels is greater now than ever before. With considerable sources available and low pollution factor, methane is a natural choice as petroleum replacement in cars and other mobile applications. However, efficient storage methods are still lacking to implement the application of methane in the automotive industry. Advanced <span class="hlt">porous</span> materials, metal-organic frameworks and <span class="hlt">porous</span> organic polymers, have received considerable attention in sorptive storage applications owing to their exceptionally high surface areas and chemically-tunable structures. In this critical review we provide an overview of the current status of the application of these two types of advanced <span class="hlt">porous</span> materials in the storage of methane. Examples of materials exhibiting high methane storage capacities are analyzed and methods for increasing the applicability of these advanced <span class="hlt">porous</span> materials in methane storage technologies described.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009ZaMP...60..138I','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009ZaMP...60..138I"><span id="translatedtitle">Thermal effects in orthotropic <span class="hlt">porous</span> elastic beams</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Iaşan, D.</p> <p>2009-01-01</p> <p>This paper is concerned with the linear theory of anisotropic <span class="hlt">porous</span> elastic bodies. The extension and bending of orthotropic <span class="hlt">porous</span> elastic cylinders subjected to a plane temperature field is investigated. The work is motivated by the recent interest in the using of the orthotropic <span class="hlt">porous</span> elastic solid as model for bones and various engineering materials. First, the thermoelastic deformation of inhomogeneous beams whose constitutive coefficients are independent of the axial coordinate is studied. Then, the extension and bending effects in orthotropic cylinders reinforced by longitudinal rods are investigated. The three-dimensional problem is reduced to the study of two-dimensional problems. The method is used to solve the problem of an orthotropic <span class="hlt">porous</span> circular cylinder with a special kind of inhomogeneity.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011PhDT.......205M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011PhDT.......205M"><span id="translatedtitle">Synthesis and gas adsorption study of <span class="hlt">porous</span> metal-organic framework materials</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Mu, Bin</p> <p></p> <p>Metal-organic frameworks (MOFs) or <span class="hlt">porous</span> coordination polymers (PCPs) have become the focus of intense study over the past decade due to their potential for advancing a variety of applications including air purification, gas storage, adsorption separations, catalysis, gas sensing, drug delivery, and so on. These materials have some distinct advantages over traditional <span class="hlt">porous</span> materials such as the well-defined structures, uniform pore sizes, chemically functionalized sorption sites, and potential for postsynthetic modification, etc. Thus, synthesis and adsorption studies of <span class="hlt">porous</span> MOFs have increased substantially in recent years. Among various prospective applications, air purification is one of the most immediate concerns, which has urgent requirements to improve current nuclear, biological, and chemical (NBC) filters <span class="hlt">involving</span> commercial and military purposes. Thus, the major goal of this funded project is to search, synthesize, and test these novel hybrid <span class="hlt">porous</span> materials for adsorptive removal of toxic industrial chemicals (TICs) and chemical warfare agents (CWAs), and to install the benchmark for new-generation NBC filters. The objective of this study is three-fold: (i) Advance our understanding of coordination chemistry by synthesizing novel MOFs and characterizing these <span class="hlt">porous</span> coordination polymers; (ii) Evaluate <span class="hlt">porous</span> MOF materials for gasadsorption applications including CO2 capture, CH4 storage, other light gas adsorption and separations, and examine the chemical and physical properties of these solid adsorbents including thermal stability and heat capacity of MOFs; (iii) Evaluate <span class="hlt">porous</span> MOF materials for next-generation NBC filter media by adsorption breakthrough measurements of TICs on MOFs, and advance our understanding about structureproperty relationships of these novel adsorbents.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1990JVSJ...33..637S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1990JVSJ...33..637S"><span id="translatedtitle">Development Of <span class="hlt">Porous</span> Glass Fiber Optic Sensors</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Macedo, P. B.; Barkatt, Aa.; Feng, X.; Finger, S. M.; Hojaji, H.; Laberge, N.; Mohr, R.; Penafiel, M.; Saad, E.</p> <p></p> <p>A method for producing rugged, continuous <span class="hlt">porous</span> glass fiber optic sensors was developed. pH and temperature sensors based on this technology have been successfully produced. The sensor portion of the fiber is made <span class="hlt">porous</span> by selective leaching of a specially formulated borosilicate glass fiber. This results in a strong, monolithic structure where the sensor portion of the fiber remains integrally attached to the rest of the fiber (which acts as a light pipe), essentially eliminating losses at the sensor-light pipe interface. Pore size in the sensor can be controllably varied by modifying heat treatment conditions, making these sensors suitable for chemical concentration measurements in liquids and gases. Appropriate dyes were chemically bonded by silanization to the large interior surface area of the <span class="hlt">porous</span> sensors to produce the pH and temperature sensors. Cresol red and phenol red were used for pH and pinacyanol chloride was used for temperature sensing. The sensitivity of these devices can be controlled by varying the concentration of the chemically bonded dye and the length of the <span class="hlt">porous</span> region. Optical absorbance measurements were made in the visible range. The tip of the sensors was coated with a thin, <span class="hlt">porous</span> layer of gold to reflect the incident light, resulting in a double pass across the <span class="hlt">porous</span> sensor. Experimental measurements were made over a pH range of 3 to 8 and a temperature range of 28-70 C. These <span class="hlt">porous</span> glass fiber optic sensors were found to be rugged and reliable due to their monolithic structure and large interior surface area for attachment of active species. A broad range of sensors based on this technology could be developed by using different active species, such as enzymes and other biochemicals, which could be bonded to the interior surface of the <span class="hlt">porous</span> glass sensor.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2002IJNAM..26..831C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2002IJNAM..26..831C"><span id="translatedtitle">Micromechanics of saturated and unsaturated <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Chateau, Xavier; Dormieux, Luc</p> <p>2002-07-01</p> <p>The homogenization method is used to determine the formulation of the behaviour of both saturated and unsaturated <span class="hlt">porous</span> media. This approach makes it possible to assess the validity of the effective stress concept as a function of the properties of the <span class="hlt">porous</span> media at the microscopic scale. Furthermore, the influence of the morphologies of the solid and fluid phases on the macroscopic behaviour is studied. The strain induced by drying is examined as a function of the morphological properties.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://ntrs.nasa.gov/search.jsp?R=20050210230&hterms=ion+exchange&qs=N%3D0%26Ntk%3DAll%26Ntx%3Dmode%2Bmatchall%26Ntt%3Dion%2Bexchange','NASA-TRS'); return false;" href="http://ntrs.nasa.gov/search.jsp?R=20050210230&hterms=ion+exchange&qs=N%3D0%26Ntk%3DAll%26Ntx%3Dmode%2Bmatchall%26Ntt%3Dion%2Bexchange"><span id="translatedtitle"><span class="hlt">Porous</span> Ceramic Spheres from Ion Exchange Resin</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Dynys, Fred</p> <p>2005-01-01</p> <p>A commercial cation ion exchange resin, cross-linked polystyrene, has been successfully used as a template to fabricate 20 to 50 micron <span class="hlt">porous</span> ceramic spheres. Ion exchange resins have dual template capabilities. Pore architecture of the ceramic spheres can be altered by changing the template pattern. Templating can be achieved by utilizing the internal <span class="hlt">porous</span> structure or the external surface of the resin beads. Synthesis methods and chemical/physical characteristics of the ceramic spheres will be reported.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1083909','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1083909"><span id="translatedtitle"><span class="hlt">Porous</span> polymeric materials for hydrogen storage</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Yu, Luping; Liu, Di-Jia; Yuan, Shengwen; Yang, Junbing</p> <p>2013-04-02</p> <p>A <span class="hlt">porous</span> polymer, poly-9,9'-spirobifluorene and its derivatives for storage of H.sub.2 are prepared through a chemical synthesis method. The <span class="hlt">porous</span> polymers have high specific surface area and narrow pore size distribution. Hydrogen uptake measurements conducted for these polymers determined a higher hydrogen storage capacity at the ambient temperature over that of the benchmark materials. The method of preparing such polymers, includes oxidatively activating solids by CO.sub.2/steam oxidation and supercritical water treatment.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/864009','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/864009"><span id="translatedtitle">Method for preparing <span class="hlt">porous</span> metal hydride compacts</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Ron, Moshe; Gruen, Dieter M.; Mendelsohn, Marshall H.; Sheft, Irving</p> <p>1981-01-01</p> <p>A method for preparing <span class="hlt">porous</span> metallic-matrix hydride compacts which can be repeatedly hydrided and dehydrided without disintegration. A mixture of a finely divided metal hydride and a finely divided matrix metal is contacted with a poison which prevents the metal hydride from dehydriding at room temperature and atmospheric pressure. The mixture of matrix metal and poisoned metal hydride is then compacted under pressure at room temperature to form <span class="hlt">porous</span> metallic-matrix hydride compacts.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/5136537','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/biblio/5136537"><span id="translatedtitle">Method for preparing <span class="hlt">porous</span> metal hydride compacts</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Ron, M.; Gruen, D.M.; Mendelsohn, M.H.; Sheft, I.</p> <p>1980-01-21</p> <p>A method for preparing <span class="hlt">porous</span> metallic-matrix hydride compacts which can be repeatedly hydrided and dehydrided without disintegration. A mixture of a finely divided metal hydride and a finely divided matrix metal is contacted with a poison which prevents the metal hydride from dehydriding at room temperature and atmospheric pressure. The mixture of matrix metal and poisoned metal hydride is then compacted under pressure at room temperature to form <span class="hlt">porous</span> metallic-matrix hydride compacts.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://ntrs.nasa.gov/search.jsp?R=19750030238&hterms=porous+material&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D70%26Ntt%3Dporous%2Bmaterial','NASA-TRS'); return false;" href="http://ntrs.nasa.gov/search.jsp?R=19750030238&hterms=porous+material&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D70%26Ntt%3Dporous%2Bmaterial"><span id="translatedtitle">Heat transfer characteristics of <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Singh, B. S.; Dybbs, A.</p> <p>1974-01-01</p> <p>An investigation was conducted regarding the relative effects of conduction and convection in a saturated <span class="hlt">porous</span> medium. A method reported by Singh et al. (1973) is used to determine the effective thermal conductivity of the saturated <span class="hlt">porous</span> material. Heat transfer measurements are conducted under conditions of forced convection of the saturated liquid parallel and countercurrent to the flow of heat. The results are compared with the data obtained with the aid of an analytical model.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/934774','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/934774"><span id="translatedtitle">Continuous time random walk analysis of solute transport in fractured <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Cortis, Andrea; Cortis, Andrea; Birkholzer, Jens</p> <p>2008-06-01</p> <p>The objective of this work is to discuss solute transport phenomena in fractured <span class="hlt">porous</span> media, where the macroscopic transport of contaminants in the highly permeable interconnected fractures can be strongly affected by solute exchange with the <span class="hlt">porous</span> rock matrix. We are interested in a wide range of rock types, with matrix hydraulic conductivities varying from almost impermeable (e.g., granites) to somewhat permeable (e.g., <span class="hlt">porous</span> sandstones). In the first case, molecular diffusion is the only transport process causing the transfer of contaminants between the fractures and the matrix blocks. In the second case, additional solute transfer occurs as a result of a combination of advective and dispersive transport mechanisms, with considerable <span class="hlt">impact</span> on the macroscopic transport behavior. We start our study by conducting numerical tracer experiments employing a discrete (microscopic) representation of fractures and matrix. Using the discrete simulations as a surrogate for the 'correct' transport behavior, we then evaluate the accuracy of macroscopic (continuum) approaches in comparison with the discrete results. However, instead of using dual-continuum models, which are quite often used to account for this type of heterogeneity, we develop a macroscopic model based on the Continuous Time Random Walk (CTRW) framework, which characterizes the interaction between the fractured and <span class="hlt">porous</span> rock domains by using a probability distribution function of residence times. A parametric study of how CTRW parameters evolve is presented, describing transport as a function of the hydraulic conductivity ratio between fractured and <span class="hlt">porous</span> domains.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li class="active"><span>20</span></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_20 --> <div id="page_21" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li class="active"><span>21</span></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="401"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016GeoRL..43.4426B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016GeoRL..43.4426B"><span id="translatedtitle">Evaporation of NaCl solution from <span class="hlt">porous</span> media with mixed wettability</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Bergstad, Mina; Shokri, Nima</p> <p>2016-05-01</p> <p>Evaporation of saline water from <span class="hlt">porous</span> media is ubiquitous in many processes including soil salinization, crop production, and CO2 sequestration in deep saline acquirer. It is controlled by the transport properties of <span class="hlt">porous</span> media, atmospheric conditions, and properties of the evaporating saline solution. In the present study, the effects of mixed wettability conditions on the general dynamics of water evaporation from <span class="hlt">porous</span> media saturated with NaCl solution were investigated. To do so, we conducted a comprehensive series of evaporation experiments using sand mixtures containing different fractions of hydrophobic grains saturated with NaCl solutions. Our results showed that increasing fraction of hydrophobic grains in the mixed wettability sand pack had minor <span class="hlt">impact</span> on the evaporative mass losses due to the presence of salt whose precipitation patterns were significantly influenced by the mixed wettability condition. Through macroscale and microscale investigations, we found formation of patchy efflorescence in the case of mixed wettability sand pack as opposed to crusty efflorescence in the case of completely hydrophilic <span class="hlt">porous</span> media. Furthermore, the presence of salty water and hydrophobic grains in the sand pack significantly influenced the general dynamics and morphology of the receding drying front. Our results extend the understanding of the saline water evaporation from <span class="hlt">porous</span> media with direct applications to various hydrological and engineering processes.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/12636279','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/12636279"><span id="translatedtitle">Analysis of bacterial random motility in a <span class="hlt">porous</span> medium using magnetic resonance imaging and immunomagnetic labeling.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Sherwood, Juli L; Sung, James C; Ford, Roseanne M; Fernandez, Erik J; Maneval, James E; Smith, James A</p> <p>2003-02-15</p> <p>In this study, we demonstrate the application of immunomagnetic labeling and magnetic resonance imaging (MRI) for the noninvasive visualization of changes in bacterial density distributions as a function of time in a water-saturated <span class="hlt">porous</span> medium. Magnetite particles (50-60 nm diameter) were attached via a monoclonal antibody to the surface' of Escherichia coli K12 NR50 cells. The cells maintained their motility after labeling, and the presence of the magnetite did not significantly alter cell swimming speed. Diffusive migration for both motile and nonmotile E. coli through a <span class="hlt">porous</span> medium with a particle-diameter distribution of 250-300 microm was compared. The movement of the nonmotile cells was described by an effective random motility coefficient consistent with Brownian diffusion of a nonmotile colloid. An effective coefficient determined a priori from bacterial motility in an aqueous medium and properties of the <span class="hlt">porous</span> medium adequately described the movement of the motile cells. The ability to noninvasively visualize bacterial concentrations within an opaque <span class="hlt">porous</span> medium in real time provides researchers with a powerful tool for studying bacterial transport in <span class="hlt">porous</span> media. This is important for understanding the <span class="hlt">impact</span> of bacterial transport on remediation strategies for environmental cleanup of polluted groundwater.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25873105','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25873105"><span id="translatedtitle">Extreme Flexibility in a Zeolitic Imidazolate Framework: <span class="hlt">Porous</span> to Dense Phase Transition in Desolvated ZIF-4.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wharmby, Michael T; Henke, Sebastian; Bennett, Thomas D; Bajpe, Sneha R; Schwedler, Inke; Thompson, Stephen P; Gozzo, Fabia; Simoncic, Petra; Mellot-Draznieks, Caroline; Tao, Haizheng; Yue, Yuanzheng; Cheetham, Anthony K</p> <p>2015-05-26</p> <p>Desolvated zeolitic imidazolate framework ZIF-4(Zn) undergoes a discontinuous <span class="hlt">porous</span> to dense phase transition on cooling through 140 K, with a 23 % contraction in unit cell volume. The structure of the non-<span class="hlt">porous</span>, low temperature phase was determined from synchrotron X-ray powder diffraction data and its density was found to be slightly less than that of the densest ZIF phase, ZIF-zni. The mechanism of the phase transition <span class="hlt">involves</span> a cooperative rotation of imidazolate linkers resulting in isotropic framework contraction and pore space minimization. DFT calculations established the energy of the new structure relative to those of the room temperature phase and ZIF-zni, while DSC measurements indicate the entropic stabilization of the <span class="hlt">porous</span> room temperature phase at temperatures above 140 K.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/13828','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/13828"><span id="translatedtitle">Optimization of Fluid Front Dynamics in <span class="hlt">Porous</span> Media Using Rate Control: I. Equal Mobility Fluids</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Sundaryanto, Bagus; Yortsos, Yanis C.</p> <p>1999-10-18</p> <p>In applications <span class="hlt">involving</span> this injection of a fluid in a <span class="hlt">porous</span> medium to displace another fluid, a main objective is the maximization of the displacement efficiency. For a fixed arrangement of injection and production points (sources and sinks), such optimization is possible by controlling the injection rate policy. Despite its practical relevance, however, this aspect has received scant attention in the literature. In this paper, a fundamental approach based on optimal control theory, for the case when the fluids are miscible, of equal viscosity and in the absence of dispersion and gravity effects. Both homogeneous and heterogeneous <span class="hlt">porous</span> media are considered. From a fluid dynamics viewpoint, this is a problem in the deformation of material lines in <span class="hlt">porous</span> media, as a function of time-varying injection rates.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/25873105','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/25873105"><span id="translatedtitle">Extreme Flexibility in a Zeolitic Imidazolate Framework: <span class="hlt">Porous</span> to Dense Phase Transition in Desolvated ZIF-4.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wharmby, Michael T; Henke, Sebastian; Bennett, Thomas D; Bajpe, Sneha R; Schwedler, Inke; Thompson, Stephen P; Gozzo, Fabia; Simoncic, Petra; Mellot-Draznieks, Caroline; Tao, Haizheng; Yue, Yuanzheng; Cheetham, Anthony K</p> <p>2015-05-26</p> <p>Desolvated zeolitic imidazolate framework ZIF-4(Zn) undergoes a discontinuous <span class="hlt">porous</span> to dense phase transition on cooling through 140 K, with a 23 % contraction in unit cell volume. The structure of the non-<span class="hlt">porous</span>, low temperature phase was determined from synchrotron X-ray powder diffraction data and its density was found to be slightly less than that of the densest ZIF phase, ZIF-zni. The mechanism of the phase transition <span class="hlt">involves</span> a cooperative rotation of imidazolate linkers resulting in isotropic framework contraction and pore space minimization. DFT calculations established the energy of the new structure relative to those of the room temperature phase and ZIF-zni, while DSC measurements indicate the entropic stabilization of the <span class="hlt">porous</span> room temperature phase at temperatures above 140 K. PMID:25873105</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/965134','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/965134"><span id="translatedtitle">Desiccation of unsaturated <span class="hlt">porous</span> media: Intermediate-scale experiments and numerical simulation</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Oostrom, Martinus; Wietsma, Thomas W.; Dane, J. H.; Truex, Michael J.; Ward, Anderson L.</p> <p>2009-08-01</p> <p>Soil desiccation (drying) is recognized as a potentially robust vadose zone remediation process <span class="hlt">involving</span> water evaporation induced by air injection and extraction. Desiccation has the potential to immobilize contaminants and could potentially improve access for other gas-phase treatments by reducing water saturation and therefore increasing sediment gas-phase permeability. Before this technology could be deployed in the field, concerns related to energy limitations, osmotic effects, and potential contaminant remobilization after rewetting need to be addressed. A series of detailed wedge-shaped, intermediate-scale laboratory experiments in unsaturated homogeneous and simple heterogeneous systems was conducted to improve the understanding of the <span class="hlt">impact</span> of energy balance issues on soil desiccation. The experiments were simulated with the multifluid flow simulator STOMP, using independently obtained hydraulic and thermal <span class="hlt">porous</span> medium properties. In all the experiments, the injection of dry air proved to be an effective means for removing essentially all moisture from the test media. Evaporative cooling was observed which generally decreased with increased distance from the gas inlet chamber. Observations of temperature in fine-grained sands in the heterogeneous systems show two local temperature minima associated with the cooling. The first one occurs because of evaporation in the adjacent medium-grained sand whereas the second minimum is attributed to evaporative cooling in the fine-grained sand itself. Results of the laboratory tests were simulated accurately when thermal properties of the flow cell walls and insulation material were taken into account, indicating that the proper physics were incorporated into the simulator.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/17952792','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/17952792"><span id="translatedtitle">Critical pathway analysis to determine key uncertainties in net <span class="hlt">impacts</span> on disease burden in Bangladesh of arsenic mitigation <span class="hlt">involving</span> the substitution of arsenic bearing for groundwater drinking water supplies.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Adamson, George C D; Polya, David A</p> <p>2007-10-01</p> <p>It has been increasingly recognised that calculation of the disease burden due to populations, such as in Bangladesh, extensively using hazardous arsenic bearing well waters, must explicitly account for the trade-off between diarrhoeal disease incidence and that of arsenic-related diseases. This is because it is likely that moves to alternative drinking water sources, be they surface waters or even more distant groundwaters, without further mitigation would result in a concurrent increase in diarrhoeal disease. In this paper, we update the model of Lokuge of the effects of such arsenic mitigation on disease burden in Bangladesh, using updated population data and background disease estimates. We run a critical pathway analysis on the model using Standardised Mortality Ratios (SMRs) for diabetes mellitus and ischemic heart disease from different epidemiological studies recently reviewed by Navas-Acien. Our analysis agrees with that of Lokuge that mitigation simply <span class="hlt">involving</span> the substitution of a range of surface waters for well water sources with As > 50 microg/L would have a net positive <span class="hlt">impact</span> on disease burden, as determined by deaths and Disability Life Adjusted Years (DALYs). In contrast, however, there is considerable ambiguity in the analogous results for mitigation for all the population exposed to well water with As > 10 microg/L. Depending upon the data source chosen for diabetes mellitus and ischaemic heart disease SMRs, such mitigation is modelled to have either a positive or a negative net <span class="hlt">impact</span> on overall disease burden. The modelled negative <span class="hlt">impacts</span> are entirely commensurate with the rationale for seeking groundwater as an alternative to surface waters as a drinking water supply, and highlight the practical requirement for multiple mitigation strategies, including those directed at ensuring the microbiological safety and continued protection of any alternative water supplies. Our study highlights the need for (i) adequate epidemiological studies</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/17952792','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/17952792"><span id="translatedtitle">Critical pathway analysis to determine key uncertainties in net <span class="hlt">impacts</span> on disease burden in Bangladesh of arsenic mitigation <span class="hlt">involving</span> the substitution of arsenic bearing for groundwater drinking water supplies.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Adamson, George C D; Polya, David A</p> <p>2007-10-01</p> <p>It has been increasingly recognised that calculation of the disease burden due to populations, such as in Bangladesh, extensively using hazardous arsenic bearing well waters, must explicitly account for the trade-off between diarrhoeal disease incidence and that of arsenic-related diseases. This is because it is likely that moves to alternative drinking water sources, be they surface waters or even more distant groundwaters, without further mitigation would result in a concurrent increase in diarrhoeal disease. In this paper, we update the model of Lokuge of the effects of such arsenic mitigation on disease burden in Bangladesh, using updated population data and background disease estimates. We run a critical pathway analysis on the model using Standardised Mortality Ratios (SMRs) for diabetes mellitus and ischemic heart disease from different epidemiological studies recently reviewed by Navas-Acien. Our analysis agrees with that of Lokuge that mitigation simply <span class="hlt">involving</span> the substitution of a range of surface waters for well water sources with As > 50 microg/L would have a net positive <span class="hlt">impact</span> on disease burden, as determined by deaths and Disability Life Adjusted Years (DALYs). In contrast, however, there is considerable ambiguity in the analogous results for mitigation for all the population exposed to well water with As > 10 microg/L. Depending upon the data source chosen for diabetes mellitus and ischaemic heart disease SMRs, such mitigation is modelled to have either a positive or a negative net <span class="hlt">impact</span> on overall disease burden. The modelled negative <span class="hlt">impacts</span> are entirely commensurate with the rationale for seeking groundwater as an alternative to surface waters as a drinking water supply, and highlight the practical requirement for multiple mitigation strategies, including those directed at ensuring the microbiological safety and continued protection of any alternative water supplies. Our study highlights the need for (i) adequate epidemiological studies</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/27285778','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/27285778"><span id="translatedtitle">A novel strategy for the preparation of <span class="hlt">porous</span> microspheres and its application in peptide drug loading.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wei, Yi; Wang, Yuxia; Zhang, Huixia; Zhou, Weiqing; Ma, Guanghui</p> <p>2016-09-15</p> <p>A new strategy is developed to prepare <span class="hlt">porous</span> microspheres with narrow size distribution for peptides controlled release, <span class="hlt">involving</span> a fabrication of <span class="hlt">porous</span> microspheres without any porogens followed by a pore closing process. Amphiphilic polymers with different hydrophobic segments (poly(monomethoxypolyethylene glycol-co-d,l-lactide) (mPEG-PLA), poly(monomethoxypolyethylene glycol-co-d,l-lactic-co-glycolic acid) (mPEG-PLGA)) are employed as microspheres matrix to prepare <span class="hlt">porous</span> microspheres based on a double emulsion-premix membrane emulsification technique combined with a solvent evaporation method. Both microspheres possess narrow size distribution and <span class="hlt">porous</span> surface, which are mainly caused by (a) hydrophilic polyethylene glycol (PEG) segments absorbing water molecules followed by a water evaporation process and (b) local explosion of microspheres due to fast evaporation of dichloromethane (MC). Importantly, mPEG-PLGA microspheres have a honeycomb like structure while mPEG-PLA microspheres have a solid structure internally, illustrating that the different hydrophobic segments could modulate the affinity between solvent and matrix polymer and influence the phase separation rate of microspheres matrix. Long term release patterns are demonstrated with pore-closed microspheres, which are prepared from mPEG-PLGA microspheres loading salmon calcitonin (SCT). These results suggest that it is potential to construct <span class="hlt">porous</span> microspheres for drug sustained release using permanent geometric templates as new porogens. PMID:27285778</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/6217714','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/6217714"><span id="translatedtitle">Model for high rate gas flows in deformable and reactive <span class="hlt">porous</span> beds</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Weston, A M</p> <p>1985-01-08</p> <p>This report presents the development of a one dimensional planar Lagrange hydrodynamic computer model which describes the processes preceding detonation. The model treats gas flow, deflagration, and compaction in a <span class="hlt">porous</span> bed of reactive material. The early part of deflagration to detonation experiment with <span class="hlt">porous</span> HMX is simulated. Sensitivity of the simulation calculation to ignition and burn rate parameters is illustrated and discussed. The effects of changing the mean particle size of the <span class="hlt">porous</span> material are investigated. There is widespread interest in runaway reaction hazards that may be associated with porosity in propellant and explosive materials. Experimentally, such reactions are initiated and observed in long, thick walled hollow tubes, filled with a granular <span class="hlt">porous</span> bed of reactive material. We will present comparisons with an experiment on <span class="hlt">porous</span> HMX to illustrate details of the model and to point out what we believe are important features of the observed phenomenon. A geometric finite element cell is devised that allows gas to flow through a compacting matrix. The experimental simulation considers the DDT process from initial squib burn through the onset of general matrix deflagration (convective burning), to the development of a fully dense compaction wave. While this simulation did not calculate turnover to detonation, it did illustrate that the transition occurred as soon as the compaction wave became fully dense. It is shown that deflagration and gas permeation lags compaction at the time of transition. This suggests that the actual transition <span class="hlt">involves</span> an additional compaction dependent process. 18 references, 20 figures, 3 tables.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20060021945','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20060021945"><span id="translatedtitle">Conceptual Design of a Condensing Heat Exchanger for Space Systems Using <span class="hlt">Porous</span> Media</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Hasan, Mohammad M.; Khan, Lutful I.; Nayagam, Vedha; Balasubramaniam, Ramaswamy</p> <p>2006-01-01</p> <p>Condensing heat exchangers are used in many space applications in the thermal and humidity control systems. In the International Space Station (ISS), humidity control is achieved by using a water cooled fin surface over which the moist air condenses, followed by "slurper bars" that take in both the condensate and air into a rotary separator and separates the water from air. The use of a cooled <span class="hlt">porous</span> substrate as the condensing surface provides and attractive alternative that combines both heat removal as well as liquid/gas separation into a single unit. By selecting the pore sizes of the <span class="hlt">porous</span> substrate a gravity independent operation may also be possible with this concept. Condensation of vapor into and on the <span class="hlt">porous</span> surface from the flowing air and the removal of condensate from the <span class="hlt">porous</span> substrate are the critical processes <span class="hlt">involved</span> in the proposed concept. This paper describes some preliminary results of the proposed condensate withdrawal process and discusses the on-going design and development work of a <span class="hlt">porous</span> media based condensing heat exchanger at the NASA Glenn Research Center in collaboration with NASA Johnson Space Center.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3051409','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3051409"><span id="translatedtitle">Bioconjugate functionalization of thermally carbonized <span class="hlt">porous</span> silicon using a radical coupling reaction†</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Sciacca, Beniamino; Alvarez, Sara D.; Geobaldo, Francesco; Sailor, Michael J.</p> <p>2011-01-01</p> <p>The high stability of Salonen’s thermally carbonized <span class="hlt">porous</span> silicon (TCPSi) has attracted attention for environmental and biochemical sensing applications, where corrosion-induced zero point drift of <span class="hlt">porous</span> silicon-based sensor elements has historically been a significant problem. Prepared by the high temperature reaction of <span class="hlt">porous</span> silicon with acetylene gas, the stability of this silicon carbide-like material also poses a challenge—many sensor applications require a functionalized surface, and the low reactivity of TCPSi has limited the ability to chemically modify its surface. This work presents a simple reaction to modify the surface of TCPSi with an alkyl carboxylate. The method <span class="hlt">involves</span> radical coupling of a dicarboxylic acid (sebacic acid) to the TCPSi surface using a benzoyl peroxide initiator. The grafted carboxylic acid species provides a route for bioconjugate chemical modification, demonstrated in this work by coupling propylamine to the surface carboxylic acid group through the intermediacy of pentafluorophenol and 1-ethyl-3-[3-dimethylaminopropyl]carbodiimide hydrochloride (EDC). The stability of the carbonized <span class="hlt">porous</span> Si surface, both before and after chemical modification, is tested in phosphate buffered saline solution and found to be superior to either hydrosilylated (with undecylenic acid) or thermally oxidized <span class="hlt">porous</span> Si surfaces. PMID:20967329</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27285778','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27285778"><span id="translatedtitle">A novel strategy for the preparation of <span class="hlt">porous</span> microspheres and its application in peptide drug loading.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wei, Yi; Wang, Yuxia; Zhang, Huixia; Zhou, Weiqing; Ma, Guanghui</p> <p>2016-09-15</p> <p>A new strategy is developed to prepare <span class="hlt">porous</span> microspheres with narrow size distribution for peptides controlled release, <span class="hlt">involving</span> a fabrication of <span class="hlt">porous</span> microspheres without any porogens followed by a pore closing process. Amphiphilic polymers with different hydrophobic segments (poly(monomethoxypolyethylene glycol-co-d,l-lactide) (mPEG-PLA), poly(monomethoxypolyethylene glycol-co-d,l-lactic-co-glycolic acid) (mPEG-PLGA)) are employed as microspheres matrix to prepare <span class="hlt">porous</span> microspheres based on a double emulsion-premix membrane emulsification technique combined with a solvent evaporation method. Both microspheres possess narrow size distribution and <span class="hlt">porous</span> surface, which are mainly caused by (a) hydrophilic polyethylene glycol (PEG) segments absorbing water molecules followed by a water evaporation process and (b) local explosion of microspheres due to fast evaporation of dichloromethane (MC). Importantly, mPEG-PLGA microspheres have a honeycomb like structure while mPEG-PLA microspheres have a solid structure internally, illustrating that the different hydrophobic segments could modulate the affinity between solvent and matrix polymer and influence the phase separation rate of microspheres matrix. Long term release patterns are demonstrated with pore-closed microspheres, which are prepared from mPEG-PLGA microspheres loading salmon calcitonin (SCT). These results suggest that it is potential to construct <span class="hlt">porous</span> microspheres for drug sustained release using permanent geometric templates as new porogens.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1992AIPC..268..421H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1992AIPC..268..421H"><span id="translatedtitle">Photoluminescence properties of <span class="hlt">porous</span> silicon</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Heben, M. J.; Xiao, Y.; McCullough, J. M.; Tsuo, Y. S.; Pankove, J. I.; Deb, S. K.</p> <p>1992-12-01</p> <p>A <span class="hlt">porous</span> silicon (PS) layer can be produced on a crystalline silicon substrate by electrochemical or chemical etching in hydrofluoric acid (HF) solutions. There are many properties that make PS thin films interesting for photovoltaic applications, such as a possible direct band gap that can be adjusted between 1.5 and 1.9 eV, textured surfaces for light trapping, the potential for low cost and large-area fabrication, and the possibility of tandem cell structures with Si. We report the fabrication of large area PS (up to 3` diameter) with quite uniform photoluminescence (PL) properties, and studies of the effects of post-hydrogenation treatments on the intensity and stability of the PL from PS. We have observed that a remote-plasma processing treatment can increase the PL emission intensity from PS prepared under certain conditions by 100 times or more. The emission band is narrower and centered more toward the blue for the remote-plasma processed sample, and the PL emission intensity does not degrade in an air ambient over a period of at least several weeks. This result indicates that PS has the potential to become a stable and useful optoelectronic material.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://ntrs.nasa.gov/search.jsp?R=19910025976&hterms=nebular+hypothesis&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3Dnebular%2Bhypothesis','NASA-TRS'); return false;" href="http://ntrs.nasa.gov/search.jsp?R=19910025976&hterms=nebular+hypothesis&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3Dnebular%2Bhypothesis"><span id="translatedtitle">Xenon fractionation in <span class="hlt">porous</span> planetesimals</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Zahnle, Kevin; Pollack, James B.; Kasting, James F.</p> <p>1990-01-01</p> <p>The distinctively fractionated Xe on Mars and earth may have its root in a common source from which both planets accreted. Beginning with Ozima and Nakazawa's (1980) hypothesis that terrestrial Xe fractionation was caused by gravitational separation of adsorbed solar nebular gases inside large <span class="hlt">porous</span> planetesimals, it is pointed out that Xe would have been trapped as the planetesimal grew and pores were squeezed shut by lithostatic pressure. It is shown that enough fractionated Xe to supply the earth could have been trapped this way. The degree of fractionation is controlled by the lithostatic pressure at the pore-closing front and so would have been roughly the same for all large planetesimals. The predicted degree of fractionation agrees well with that preserved in terrestrial and Martian Xe. Relative to Xe, this source is strongly depleted in other noble gases. In contrast to the original Ozima and Nakazawa hypothesis, the present hypothesis predicts the observed fractionation, and it allows planetary accretion to occur after the dissipation of the solar nebula.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/11537194','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/11537194"><span id="translatedtitle">Xenon fractionation in <span class="hlt">porous</span> planetesimals.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Zahnle, K; Pollack, J B; Kasting, J F</p> <p>1990-01-01</p> <p>The distinctively fractionated Xe on Mars and Earth may have its root in a common source from which both planets accreted. We begin with Ozima and Nakazawa's hypothesis that terrestrial Xe fractionation was caused by gravitational separation of adsorbed solar nebular gases inside large <span class="hlt">porous</span> planetesimals. We point out that Xe would have been trapped as the planetesimal grew and pores were squeezed shut by lithostatic pressure. We show that enough fractionated Xe to supply the Earth could have been trapped this way. The degree of fractionation is controlled by the lithostatic pressure at the pore-closing front and so would have been roughly the same for all large planetesimals. The predicted degree of fractionation agrees well with that preserved in terrestrial and martian Xe. Relative to Xe, this source is strongly depleted in other noble gases. In contrast to the original Ozima and Nakazawa hypothesis, our hypothesis predicts the observed fractionation, and it allows planetary accretion to occur after the dissipation of the solar nebula. The required planetesimals are large, representing a class of object now extinct in the solar system.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/11537194','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/11537194"><span id="translatedtitle">Xenon fractionation in <span class="hlt">porous</span> planetesimals.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Zahnle, K; Pollack, J B; Kasting, J F</p> <p>1990-01-01</p> <p>The distinctively fractionated Xe on Mars and Earth may have its root in a common source from which both planets accreted. We begin with Ozima and Nakazawa's hypothesis that terrestrial Xe fractionation was caused by gravitational separation of adsorbed solar nebular gases inside large <span class="hlt">porous</span> planetesimals. We point out that Xe would have been trapped as the planetesimal grew and pores were squeezed shut by lithostatic pressure. We show that enough fractionated Xe to supply the Earth could have been trapped this way. The degree of fractionation is controlled by the lithostatic pressure at the pore-closing front and so would have been roughly the same for all large planetesimals. The predicted degree of fractionation agrees well with that preserved in terrestrial and martian Xe. Relative to Xe, this source is strongly depleted in other noble gases. In contrast to the original Ozima and Nakazawa hypothesis, our hypothesis predicts the observed fractionation, and it allows planetary accretion to occur after the dissipation of the solar nebula. The required planetesimals are large, representing a class of object now extinct in the solar system. PMID:11537194</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015CRMec.343..533S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015CRMec.343..533S"><span id="translatedtitle">Lattice Boltzmann formulation for flows with acoustic <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Sun, Chenghai; Pérot, Franck; Zhang, Raoyang; Lew, Phoi-Tack; Mann, Adrien; Gupta, Vinit; Freed, David M.; Staroselsky, Ilya; Chen, Hudong</p> <p>2015-10-01</p> <p><span class="hlt">Porous</span> materials are commonly used in various industrial systems such as ducts, HVAC, hoods, mufflers, in order to introduce acoustic absorption and to reduce the radiated acoustics levels. For problems <span class="hlt">involving</span> flow-induced noise mechanisms and explicit interactions between turbulent source regions, numerical approaches remain a challenging task <span class="hlt">involving</span>, on the one hand, the coupling between unsteady flow calculations and acoustics simulations and, on the other hand, the development of advanced and sensitive numerical schemes. In this paper, acoustic materials are explicitly modeled in lattice Boltzmann simulations using equivalent fluid regions having arbitrary porosity and resistivity. Numerical simulations are compared to analytical derivations as well as experiments and semi-empirical models to validate the approach.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2010PhDT.......264M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2010PhDT.......264M"><span id="translatedtitle">Modeling imbibition of liquids into rigid and swelling <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Masoodi, Reza</p> <p></p> <p>In <span class="hlt">porous</span> media studies, imbibition is the spontaneous movement of a liquid into a <span class="hlt">porous</span> medium under the influence of capillary forces. It is also known by the name wicking, and can sometimes be aided by an external pressure, as in the case of forced infiltration of liquid polymers into a bed of fibermats. In this study, the imbibition of liquids into <span class="hlt">porous</span> media in important engineering applications is studied. A relatively new approach of using the single-phase flow behind a clearly-defined liquid front in a <span class="hlt">porous</span> medium has been adopted in this work to model imbibition or wicking. Such an approach employs Darcy's law in conjunction with the continuity equation to model the liquid flow behind the front. First the modeling of liquid flow in polymer wicks is undertaken. A new formula to predict the capillary suction-pressure at the liquid fronts in commercial wicks made of sintering the polymer beads was proposed. Later, a more general formula was derived and verified for estimating the capillary suction pressure in any kind of <span class="hlt">porous</span> substance. We compared the performance of the proposed Darcy's-law based approach with that of the Lucas-Washburn equation; some new methods were suggested to improve the accuracy of these two dominant methods for modeling the liquid transport in aforementioned wicks. Our Darcy's law based modeling approach is superior to the previous Washburn Equation based approaches as the former can be easily extended to 2-D and 3-D unlike the latter. The 3-D liquid flow in the wicks was studied numerically using PORE-FLOW(c), an in-house computer program to model <span class="hlt">porous</span>-media flows. For the first time, the finite element/control volume (FE/CV) algorithm is employed to solve the moving- boundary problem encountered in wicking. A good validation is achieved against the 1-D wicking-flow analytical solution as well as a 3-D wicking experiment <span class="hlt">involving</span> a wick with two different cross-sections. A special case of wicking, in which both the external</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3506525','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3506525"><span id="translatedtitle">Nanostructures formed by displacement of <span class="hlt">porous</span> silicon with copper: from nanoparticles to <span class="hlt">porous</span> membranes</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p></p> <p>2012-01-01</p> <p>The application of <span class="hlt">porous</span> silicon as a template for the fabrication of nanosized copper objects is reported. Three different types of nanostructures were formed by displacement deposition of copper on <span class="hlt">porous</span> silicon from hydrofluoric acid-based solutions of copper sulphate: (1) copper nanoparticles, (2) quasi-continuous copper films, and (3) free <span class="hlt">porous</span> copper membranes. Managing the parameters of <span class="hlt">porous</span> silicon (pore sizes, porosity), deposition time, and wettability of the copper sulphate solution has allowed to achieve such variety of the copper structures. Elemental and structural analyses of the obtained structures are presented. Young modulus measurements of the <span class="hlt">porous</span> copper membrane have been carried out and its modest activity in surface enhanced Raman spectroscopy is declared. PMID:22916840</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li class="active"><span>21</span></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_21 --> <div id="page_22" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li class="active"><span>22</span></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="421"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25656560','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25656560"><span id="translatedtitle">From <span class="hlt">porous</span> gold nanocups to <span class="hlt">porous</span> nanospheres and solid particles--a new synthetic approach.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Ihsan, Ayesha; Katsiev, Habib; Alyami, Noktan; Anjum, Dalaver H; Khan, Waheed S; Hussain, Irshad</p> <p>2015-05-15</p> <p>We report a versatile approach for the synthesis of <span class="hlt">porous</span> gold nanocups, <span class="hlt">porous</span> gold nanospheres and solid gold nanoparticles. Gold nanocups are formed by the slow reduction of gold salt (HAuCl4⋅3H2O) using aminoantipyrene (AAP) as a reducing agent. Adding polyvinylpyrrolidone (PVP) to the gold salt followed by reduction with AAP resulted in the formation of <span class="hlt">porous</span> gold nanospheres. Microwave irradiation of both of these <span class="hlt">porous</span> gold particles resulted in the formation of slightly smaller but solid gold particles. All these nanoparticles are thoroughly characterized by UV-visible spectroscopy, scanning electron microscopy (SEM), high resolution transmission electron microscopy (HR-TEM) and bright-field tomography. Due to the larger size, <span class="hlt">porous</span> nature, low density and higher surface area, these nanomaterials may have interesting applications in catalysis, drug delivery, phototherapy and sensing.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22916840','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22916840"><span id="translatedtitle">Nanostructures formed by displacement of <span class="hlt">porous</span> silicon with copper: from nanoparticles to <span class="hlt">porous</span> membranes.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Bandarenka, Hanna; Redko, Sergey; Smirnov, Aleksandr; Panarin, Andrei; Terekhov, Sergei; Nenzi, Paolo; Balucani, Marco; Bondarenko, Vitaly</p> <p>2012-01-01</p> <p>The application of <span class="hlt">porous</span> silicon as a template for the fabrication of nanosized copper objects is reported. Three different types of nanostructures were formed by displacement deposition of copper on <span class="hlt">porous</span> silicon from hydrofluoric acid-based solutions of copper sulphate: (1) copper nanoparticles, (2) quasi-continuous copper films, and (3) free <span class="hlt">porous</span> copper membranes. Managing the parameters of <span class="hlt">porous</span> silicon (pore sizes, porosity), deposition time, and wettability of the copper sulphate solution has allowed to achieve such variety of the copper structures. Elemental and structural analyses of the obtained structures are presented. Young modulus measurements of the <span class="hlt">porous</span> copper membrane have been carried out and its modest activity in surface enhanced Raman spectroscopy is declared.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/20849094','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/20849094"><span id="translatedtitle">Direct imprinting of <span class="hlt">porous</span> substrates: a rapid and low-cost approach for patterning <span class="hlt">porous</span> nanomaterials.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Ryckman, Judson D; Liscidini, Marco; Sipe, J E; Weiss, S M</p> <p>2011-05-11</p> <p>This work describes a technique for one-step, direct patterning of <span class="hlt">porous</span> nanomaterials, including insulators, semiconductors, and metals without the need for intermediate polymer processing or dry etching steps. Our process, which we call "direct imprinting of <span class="hlt">porous</span> substrates (DIPS)", utilizes reusable stamps with micro- and nanoscale features that are applied directly to a <span class="hlt">porous</span> material to selectively compress or crush the <span class="hlt">porous</span> network. The stamp pattern is transferred to the <span class="hlt">porous</span> material with high fidelity, vertical resolution below 5 nm, and lateral resolution below 100 nm. The process is performed in less than one minute at room temperature and at standard atmospheric pressure. We have demonstrated structures ranging from subwavelength optical components to microparticles and present exciting avenues for applications including surface-enhanced Raman spectroscopy (SERS), label-free biosensors, and drug delivery.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015AGUFM.H41C1325C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015AGUFM.H41C1325C"><span id="translatedtitle">Comparison of the Shan-Chen and Color-Fluid Models in Lattice Boltzmann Simulation of Two-Phase Flow in <span class="hlt">Porous</span> Media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Chen, Y.; Valocchi, A. J.; Kohanpur, A. H.; Freiburg, J. T.</p> <p>2015-12-01</p> <p>Direct numerical simulation of multiphase flow in <span class="hlt">porous</span> media is an important tool for understanding pore-scale processes affecting transport and fate of supercritical CO2 in saline reservoirs. The lattice Boltzmann method, based on microscopic models and mesoscopic kinetic equations, is particularly well suited for fluid flow simulations <span class="hlt">involving</span> interfacial dynamics and complex boundaries. In this study, we compare the Shan-Chen and color-fluid model in lattice Boltzmann simulation of multiphase flow in <span class="hlt">porous</span> media. The original models were proposed two decades ago, and suffer from significant spurious currents as well as other numerical limitations. Therefore, the latest developments of the two models are employed, which allows consideration of density and viscosity contrasts relevant to geological sequestration in saline reservoirs. Previous studies of the comparison of the two models were mostly done in simple geometries, and demonstrated that the Shan-Chen model suffered from more serious numerical errors than the color-fluid model, although the latter is more computationally demanding. The real <span class="hlt">impact</span> on multiphase flow in <span class="hlt">porous</span> media has not been studied in detail. In this investigation, we employ realistic fluid parameters and perform numerical simulations in geometries based on micro-CT images of rock cores. The fluid displacement patterns and the relative permeability obtained by simulations will be used to evaluate the two models. The computational cost of the two models will also be presented for comparison. This work was supported as part of the Center for Geologic Storage of CO2, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/21072297','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/21072297"><span id="translatedtitle">Entropy-induced separation of star polymers in <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Blavats'ka, V.; Ferber, C. von; Holovatch, Yu.</p> <p>2006-09-15</p> <p>We present a quantitative picture of the separation of star polymers in a solution where part of the volume is influenced by a <span class="hlt">porous</span> medium. To this end, we study the <span class="hlt">impact</span> of long-range-correlated quenched disorder on the entropy and scaling properties of f-arm star polymers in a good solvent. We assume that the disorder is correlated on the polymer length scale with a power-law decay of the pair correlation function g(r){approx}r{sup -a}. Applying the field-theoretical renormalization group approach we show in a double expansion in {epsilon}=4-d and {delta}=4-a that there is a range of correlation strengths {delta} for which the disorder changes the scaling behavior of star polymers. In a second approach we calculate for fixed space dimension d=3 and different values of the correlation parameter a the corresponding scaling exponents {gamma}{sub f} that govern entropic effects. We find that {gamma}{sub f}-1, the deviation of {gamma}{sub f} from its mean field value is amplified by the disorder once we increase {delta} beyond a threshold. The consequences for a solution of diluted chain and star polymers of equal molecular weight inside a <span class="hlt">porous</span> medium are that star polymers exert a higher osmotic pressure than chain polymers and in general higher branched star polymers are expelled more strongly from the correlated <span class="hlt">porous</span> medium. Surprisingly, polymer chains will prefer a stronger correlated medium to a less or uncorrelated medium of the same density while the opposite is the case for star polymers.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014AGUFM.H33D0849B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014AGUFM.H33D0849B"><span id="translatedtitle">Observations of Chemical Transport and Reaction in <span class="hlt">Porous</span> Media in 3D with Applications to Understanding the Role of Heterogeneity in Reactive Transport</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Boon, M.; Niu, B.; Krevor, S. C.</p> <p>2014-12-01</p> <p>Processes <span class="hlt">involving</span> feedbacks between chemical reaction and fluid flow through <span class="hlt">porous</span> media are poorly understood. Non-reactive and reactive core flooding experiments have been carried out in sandstone and two carbonate cores with varying degrees of heterogeneity. The dispersion, mixing and reaction of chemical components in an aqueous solution injected into rock cores were visualised in 3D with the use of chemical dopants and a medical x-ray CT scanner. With regards to solid-fluid reactions, the <span class="hlt">impact</span> of rock dissolution on subsequent chemical transport was observed by injecting a carefully selected acidic solution. Simultaneous observations of the permeability evolution were made along with analysis of the effluent chemistry using an ICP-MS. This has resulted in a high quality 3D data set of the space and time evolution of the concentration of aqueous chemical components in non-reactive and reactive core-flooding experiments in rocks with different degrees of heterogeneity in combination with precise data of the effluent composition and rock permeability. This will allow us to assess the effect of flow and transport heterogeneity on upscaled effective reaction rates. Furthermore, these observations can be used as a future benchmark test for numerical models for chemical transport and fluid-solid reactions and in the development of upscaling techniques for accurate and efficient modelling of chemical processes during flow in <span class="hlt">porous</span> media.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26212784','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26212784"><span id="translatedtitle">Numerical investigation of nanoparticles transport in anisotropic <span class="hlt">porous</span> media.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Salama, Amgad; Negara, Ardiansyah; El Amin, Mohamed; Sun, Shuyu</p> <p>2015-10-01</p> <p>In this work the problem related to the transport of nanoparticles in anisotropic <span class="hlt">porous</span> media is investigated numerically using the multipoint flux approximation. Anisotropy of <span class="hlt">porous</span> media properties is an essential feature that exists almost everywhere in subsurface formations. In anisotropic media, the flux and the pressure gradient vectors are no longer collinear and therefore interesting patterns emerge. The transport of nanoparticles in subsurface formations is affected by several complex processes including surface charges, heterogeneity of nanoparticles and soil grain collectors, interfacial dynamics of double-layer and many others. We use the framework of the theory of filtration in this investigation. Processes like particles deposition, entrapment, as well as detachment are accounted for. From the numerical methods point of view, traditional two-point flux finite difference approximation cannot handle anisotropy of media properties. Therefore, in this work we use the multipoint flux approximation (MPFA). In this technique, the flux components are affected by more neighboring points as opposed to the mere two points that are usually used in traditional finite volume methods. We also use the experimenting pressure field approach which automatically constructs the global system of equations by solving multitude of local problems. This approach facilitates to a large extent the construction of the global system. A set of numerical examples is considered <span class="hlt">involving</span> two-dimensional rectangular domain. A source of nanoparticles is inserted in the middle of the anisotropic layer. We investigate the effects of both anisotropy angle and anisotropy ratio on the transport of nanoparticles in saturated <span class="hlt">porous</span> media. It is found that the concentration plume and porosity contours follow closely the principal direction of anisotropy of permeability of the central domain.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2002PhRvE..65c6318K','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2002PhRvE..65c6318K"><span id="translatedtitle">Lattice Boltzmann simulation of chemical dissolution in <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Kang, Qinjun; Zhang, Dongxiao; Chen, Shiyi; He, Xiaoyi</p> <p>2002-03-01</p> <p>In this paper, we develop a lattice Boltzmann model for simulating the transport and reaction of fluids in <span class="hlt">porous</span> media. To simulate such a system, we account for the interaction of forced convection, molecular diffusion, and surface reaction. The problem is complicated by the evolution of the <span class="hlt">porous</span> media geometry due to chemical reactions, which may significantly and continuously modify the hydrologic properties of the media. The particular application that motivates the present study is acid stimulation, a common technique used to increase production from petroleum reservoirs. This technique <span class="hlt">involves</span> the injection of acid (e.g., hydrochloric acid, HCl, acetic acid, HAc) into the formation to dissolve minerals comprising the rock. As acid is injected, highly conductive channels or ``wormholes'' may be formed. The dissolution of carbonate rocks in 0.5M HCl and 0.5M HAc is simulated with the lattice Boltzmann model developed in this study. The dependence of dissolution process and the geometry of the final wormhole pattern on the acid type and the injection rate is studied. The results agree qualitatively with the experimental and theoretical analyses of others and substantiate the previous finding that there exists an optimal injection rate at which the wormhole is formed as well as the number of pore volumes of the injected fluid to break through is minimized. This study also confirms the experimentally observed phenomenon that the optimal injection rate decreases and the corresponding minimized number of pore volumes to break through increases as the acid is changed from HCl to HAc. Simulations suggest that the proposed lattice Boltzmann model may serve as an alternative reliable quantitative approach to study chemical dissolution in <span class="hlt">porous</span> media.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/11909255','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/11909255"><span id="translatedtitle">Lattice Boltzmann simulation of chemical dissolution in <span class="hlt">porous</span> media.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Kang, Qinjun; Zhang, Dongxiao; Chen, Shiyi; He, Xiaoyi</p> <p>2002-03-01</p> <p>In this paper, we develop a lattice Boltzmann model for simulating the transport and reaction of fluids in <span class="hlt">porous</span> media. To simulate such a system, we account for the interaction of forced convection, molecular diffusion, and surface reaction. The problem is complicated by the evolution of the <span class="hlt">porous</span> media geometry due to chemical reactions, which may significantly and continuously modify the hydrologic properties of the media. The particular application that motivates the present study is acid stimulation, a common technique used to increase production from petroleum reservoirs. This technique <span class="hlt">involves</span> the injection of acid (e.g., hydrochloric acid, HCl, acetic acid, HAc) into the formation to dissolve minerals comprising the rock. As acid is injected, highly conductive channels or "wormholes" may be formed. The dissolution of carbonate rocks in 0.5M HCl and 0.5M HAc is simulated with the lattice Boltzmann model developed in this study. The dependence of dissolution process and the geometry of the final wormhole pattern on the acid type and the injection rate is studied. The results agree qualitatively with the experimental and theoretical analyses of others and substantiate the previous finding that there exists an optimal injection rate at which the wormhole is formed as well as the number of pore volumes of the injected fluid to break through is minimized. This study also confirms the experimentally observed phenomenon that the optimal injection rate decreases and the corresponding minimized number of pore volumes to break through increases as the acid is changed from HCl to HAc. Simulations suggest that the proposed lattice Boltzmann model may serve as an alternative reliable quantitative approach to study chemical dissolution in <span class="hlt">porous</span> media.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26212784','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26212784"><span id="translatedtitle">Numerical investigation of nanoparticles transport in anisotropic <span class="hlt">porous</span> media.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Salama, Amgad; Negara, Ardiansyah; El Amin, Mohamed; Sun, Shuyu</p> <p>2015-10-01</p> <p>In this work the problem related to the transport of nanoparticles in anisotropic <span class="hlt">porous</span> media is investigated numerically using the multipoint flux approximation. Anisotropy of <span class="hlt">porous</span> media properties is an essential feature that exists almost everywhere in subsurface formations. In anisotropic media, the flux and the pressure gradient vectors are no longer collinear and therefore interesting patterns emerge. The transport of nanoparticles in subsurface formations is affected by several complex processes including surface charges, heterogeneity of nanoparticles and soil grain collectors, interfacial dynamics of double-layer and many others. We use the framework of the theory of filtration in this investigation. Processes like particles deposition, entrapment, as well as detachment are accounted for. From the numerical methods point of view, traditional two-point flux finite difference approximation cannot handle anisotropy of media properties. Therefore, in this work we use the multipoint flux approximation (MPFA). In this technique, the flux components are affected by more neighboring points as opposed to the mere two points that are usually used in traditional finite volume methods. We also use the experimenting pressure field approach which automatically constructs the global system of equations by solving multitude of local problems. This approach facilitates to a large extent the construction of the global system. A set of numerical examples is considered <span class="hlt">involving</span> two-dimensional rectangular domain. A source of nanoparticles is inserted in the middle of the anisotropic layer. We investigate the effects of both anisotropy angle and anisotropy ratio on the transport of nanoparticles in saturated <span class="hlt">porous</span> media. It is found that the concentration plume and porosity contours follow closely the principal direction of anisotropy of permeability of the central domain. PMID:26212784</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/21768033','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/21768033"><span id="translatedtitle"><span class="hlt">Porous</span> piezoceramics: theory, technology, and properties.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Rybyanets, Andrey N</p> <p>2011-07-01</p> <p>A comprehensive review of porosity origin, microstructure peculiarities, fabrication methods, and mathematical models, as well as systematic experimental data for different <span class="hlt">porous</span> piezoceramics with 3-0/3-3 connectivity is presented. New families of <span class="hlt">porous</span> piezoceramics based on lead zirconate titanate (PZT), lead titanate, lead metaniobate, and sodiumpotassium niobate compositions, with properties combining better parameters of PZT, PN-type ceramics, and 1-3 composites are introduced. Piezoelectric resonance analysis methods for automatic iterative evaluation of complex material parameters and the full sets of complex constants for different <span class="hlt">porous</span> piezoceramics are presented. Numerical FEM calculations were critically compared with the results of various approximated formulas, unit cell models, and experimental data for different <span class="hlt">porous</span> piezoceramics. Microstructural and physical mechanisms of losses and dispersion in <span class="hlt">porous</span> piezoceramics, as well as technological aspects of their large-scale manufacture and application in ultrasonic devices were considered. The results of SEM microstructure analysis and microstructure-properties interrelations were discussed. Recent advances in fabrication methods for nano- and microporous piezoceramics and ceramic piezocomposites were discussed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016NRL....11...43O','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016NRL....11...43O"><span id="translatedtitle">Effect of Graphene Oxide on the Properties of <span class="hlt">Porous</span> Silicon</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Olenych, Igor B.; Aksimentyeva, Olena I.; Monastyrskii, Liubomyr S.; Horbenko, Yulia Yu.; Partyka, Maryan V.; Luchechko, Andriy P.; Yarytska, Lidia I.</p> <p>2016-02-01</p> <p>We studied an effect of the graphene oxide (GO) layer on the optical and electrical properties of <span class="hlt">porous</span> silicon (PS) in hybrid PS-GO structure created by electrochemical etching of silicon wafer and deposition of GO from water dispersion on PS. With the help of scanning electron microscopy (SEM), atomic-force microscopy (AFM), and Fourier transform infrared (FTIR) spectroscopy, it was established that GO formed a thin film on the PS surface and is partly embedded in the pores of PS. A comparative analysis of the FTIR spectra for the PS and PS-GO structures confirms the passivation of the PS surface by the GO film. This film has a sufficient transparency for excitation and emission of photoluminescence (PL). Moreover, GO modifies PL spectrum of PS, shifting the PL maximum by 25 nm towards lower energies. GO deposition on the surface of the <span class="hlt">porous</span> silicon leads to the change in the electrical parameters of PS in AC and DC modes. By means of current-voltage characteristics (CVC) and impedance spectroscopy, it is shown that the <span class="hlt">impact</span> of GO on electrical characteristics of PS manifests in reduced capacitance and lower internal resistance of hybrid structures.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014JPhCS.500r2030P','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014JPhCS.500r2030P"><span id="translatedtitle">Modelling dynamic compaction of <span class="hlt">porous</span> materials with the overstress approach</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Partom, Y.</p> <p>2014-05-01</p> <p>To model compaction of a <span class="hlt">porous</span> material we need 1) an equation of state of the <span class="hlt">porous</span> material in terms of the equation of state of its matrix, and 2) a compaction law. For an equation of state it is common to use Herrmann's suggestion, as in his Pα model. For a compaction law it is common to use a quasi-static compaction relation obtained from 1) a meso-scale model (as in Carroll and Holt's spherical shell model), or from 2) quasi-static tests. Here we are interested in dynamic compaction, like in a planar <span class="hlt">impact</span> test. In dynamic compaction the state may change too fast for the state point to follow the quasi-static compaction curve. We therefore get an overstress situation. The state point moves out of the quasi-static compaction boundary, and only with time collapses back towards it at a certain rate. In this way the dynamic compaction event becomes rate dependent. In the paper we first write down the rate equations for dynamic compaction according to the overstress approach. We then implement these equations in a hydro-code and run some examples. We show how the overstress rate parameter can be calibrated from tests.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26741883','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26741883"><span id="translatedtitle"><span class="hlt">Porous</span> Silicon's Photoactivity in Water: Insights into Environmental Fate.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Moor, Kyle J; Cates, Ezra L; Kim, Jae-Hong</p> <p>2016-01-19</p> <p>Interest in <span class="hlt">porous</span> silicon (pSi) (and, more broadly, silicon nanoparticles (NPs)) has increased along with their concomitant use in various commercial and consumer products, yet little is known about their behavior in the natural environment. In this study, we have investigated the photosensitization, optical, and surface properties of pSi as a function of time in aqueous systems. Samples were prepared via an anodic electrochemical etching procedure, resulting in pSi particles with diameters of ca. 500 nm, composed of a <span class="hlt">porous</span> network of Si nanocrystallites of 2-4 nm. Initially, pSi particles generated significant amounts of (1)O2, yet they rapidly lost much of this ability due to the formation of an oxide layer on the surface, as determined by X-ray photoelectron spectroscopy, which likely prevented further photosensitization events. Addition of natural organic matter (NOM) did not significantly <span class="hlt">impact</span> pSi's photosensitization abilities. The pSi lacked any intrinsic bactericidal properties on Escherichia coli and did not produce enough (1)O2 to considerably affect populations of a model virus, PR772, highlighting its relatively benign nature toward microbial communities. Results from this study suggest that the photoactivity of pSi is unlikely to persist in aqueous systems and that it may instead behave more similarly to silica particles from an environmental perspective. PMID:26741883</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26741883','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26741883"><span id="translatedtitle"><span class="hlt">Porous</span> Silicon's Photoactivity in Water: Insights into Environmental Fate.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Moor, Kyle J; Cates, Ezra L; Kim, Jae-Hong</p> <p>2016-01-19</p> <p>Interest in <span class="hlt">porous</span> silicon (pSi) (and, more broadly, silicon nanoparticles (NPs)) has increased along with their concomitant use in various commercial and consumer products, yet little is known about their behavior in the natural environment. In this study, we have investigated the photosensitization, optical, and surface properties of pSi as a function of time in aqueous systems. Samples were prepared via an anodic electrochemical etching procedure, resulting in pSi particles with diameters of ca. 500 nm, composed of a <span class="hlt">porous</span> network of Si nanocrystallites of 2-4 nm. Initially, pSi particles generated significant amounts of (1)O2, yet they rapidly lost much of this ability due to the formation of an oxide layer on the surface, as determined by X-ray photoelectron spectroscopy, which likely prevented further photosensitization events. Addition of natural organic matter (NOM) did not significantly <span class="hlt">impact</span> pSi's photosensitization abilities. The pSi lacked any intrinsic bactericidal properties on Escherichia coli and did not produce enough (1)O2 to considerably affect populations of a model virus, PR772, highlighting its relatively benign nature toward microbial communities. Results from this study suggest that the photoactivity of pSi is unlikely to persist in aqueous systems and that it may instead behave more similarly to silica particles from an environmental perspective.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4770411','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4770411"><span id="translatedtitle">Morphology-dependent Electrochemical Enhancements of <span class="hlt">Porous</span> Carbon as Sensitive Determination Platform for Ascorbic Acid, Dopamine and Uric Acid</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Cheng, Qin; Ji, Liudi; Wu, Kangbing; Zhang, Weikang</p> <p>2016-01-01</p> <p>Using starch as the carbon precursor and different-sized ZnO naoparticles as the hard template, a series of <span class="hlt">porous</span> carbon materials for electrochemical sensing were prepared. Experiments of scanning electron microscopy, transmission electron microscopy and Nitrogen adsorption-desorption isotherms reveal that the particle size of ZnO has big <span class="hlt">impacts</span> on the <span class="hlt">porous</span> morphology and surface area of the resulting carbon materials. Through ultrasonic dispersion of <span class="hlt">porous</span> carbon and subsequent solvent evaporation, different sensing interfaces were constructed on the surface of glassy carbon electrode (GCE). The electrochemical behaviors of ascorbic acid (AA), dopamine (DA) and uric acid (UA) were studied. On the surface of <span class="hlt">porous</span> carbon materials, the accumulation efficiency and electron transfer ability of AA, DA and UA are improved, and consequently their oxidation signals enhance greatly. Moreover, the interface enhancement effects of <span class="hlt">porous</span> carbon are also controlled by the particle size of hard template. The constructed <span class="hlt">porous</span> carbon interface displays strong signal amplification ability and holds great promise in constructing a sensitive platform for the simultaneous determination of AA, DA and UA. PMID:26924080</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4483870','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4483870"><span id="translatedtitle">The application of <span class="hlt">porous</span> tantalum cylinder to the repair of comminuted bone defects: a study of rabbit firearm injuries</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Ren, Bo; Zhai, Zhenbo; Guo, Kai; Liu, Yanpu; Hou, Weihuan; Zhu, Qingsheng; Zhu, Jinyu</p> <p>2015-01-01</p> <p>The aim of this study is to investigate the effect of <span class="hlt">porous</span> tantalum material in repair tibial defects caused by firearm injuries in a rabbit model. A multifunctional biological <span class="hlt">impact</span> machine was used to establish a rabbit tibial defect model of firearm injury. <span class="hlt">Porous</span> tantalum rods were processed into a hollow cylinder. Kirschner wires were used for intramedullary fixation. We compared the differences of the bone ingrowth of the <span class="hlt">porous</span> tantalum material by gross observations, X-rays and histological evaluations. The radiographic observations revealed that fibrous tissue covered the material surface after 4 weeks, and periosteal reactions and new bone callus extending materials appeared after 8 weeks. After 16 weeks, the calluses of the firearm injury group were completely wrapped around a <span class="hlt">porous</span> tantalum material. The group with the highest Lane-Sandhu X-rays cores was the firearm injury and tantalum implant group, and the blank control group exhibited the lowest scores. The histological evaluations revealed that the presence of new bone around the biomaterial had grown into the <span class="hlt">porous</span> tantalum. By the 16th week, the areas of bone tissue of the firearm injury group was significant higher than that of non-firearm injury group (P<0.05). The comminuted fractures treated with tantalum cylinders exhibited greater bone ingrowth in the firearm injury group. In conditions of firearm injuries, the <span class="hlt">porous</span> tantalum biomaterial exhibited bone ingrowth that was beneficial to the treatment of bone defects. PMID:26131078</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016NatSR...622309C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016NatSR...622309C"><span id="translatedtitle">Morphology-dependent Electrochemical Enhancements of <span class="hlt">Porous</span> Carbon as Sensitive Determination Platform for Ascorbic Acid, Dopamine and Uric Acid</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Cheng, Qin; Ji, Liudi; Wu, Kangbing; Zhang, Weikang</p> <p>2016-02-01</p> <p>Using starch as the carbon precursor and different-sized ZnO naoparticles as the hard template, a series of <span class="hlt">porous</span> carbon materials for electrochemical sensing were prepared. Experiments of scanning electron microscopy, transmission electron microscopy and Nitrogen adsorption-desorption isotherms reveal that the particle size of ZnO has big <span class="hlt">impacts</span> on the <span class="hlt">porous</span> morphology and surface area of the resulting carbon materials. Through ultrasonic dispersion of <span class="hlt">porous</span> carbon and subsequent solvent evaporation, different sensing interfaces were constructed on the surface of glassy carbon electrode (GCE). The electrochemical behaviors of ascorbic acid (AA), dopamine (DA) and uric acid (UA) were studied. On the surface of <span class="hlt">porous</span> carbon materials, the accumulation efficiency and electron transfer ability of AA, DA and UA are improved, and consequently their oxidation signals enhance greatly. Moreover, the interface enhancement effects of <span class="hlt">porous</span> carbon are also controlled by the particle size of hard template. The constructed <span class="hlt">porous</span> carbon interface displays strong signal amplification ability and holds great promise in constructing a sensitive platform for the simultaneous determination of AA, DA and UA.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26131078','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26131078"><span id="translatedtitle">The application of <span class="hlt">porous</span> tantalum cylinder to the repair of comminuted bone defects: a study of rabbit firearm injuries.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Ren, Bo; Zhai, Zhenbo; Guo, Kai; Liu, Yanpu; Hou, Weihuan; Zhu, Qingsheng; Zhu, Jinyu</p> <p>2015-01-01</p> <p>The aim of this study is to investigate the effect of <span class="hlt">porous</span> tantalum material in repair tibial defects caused by firearm injuries in a rabbit model. A multifunctional biological <span class="hlt">impact</span> machine was used to establish a rabbit tibial defect model of firearm injury. <span class="hlt">Porous</span> tantalum rods were processed into a hollow cylinder. Kirschner wires were used for intramedullary fixation. We compared the differences of the bone ingrowth of the <span class="hlt">porous</span> tantalum material by gross observations, X-rays and histological evaluations. The radiographic observations revealed that fibrous tissue covered the material surface after 4 weeks, and periosteal reactions and new bone callus extending materials appeared after 8 weeks. After 16 weeks, the calluses of the firearm injury group were completely wrapped around a <span class="hlt">porous</span> tantalum material. The group with the highest Lane-Sandhu X-rays cores was the firearm injury and tantalum implant group, and the blank control group exhibited the lowest scores. The histological evaluations revealed that the presence of new bone around the biomaterial had grown into the <span class="hlt">porous</span> tantalum. By the 16th week, the areas of bone tissue of the firearm injury group was significant higher than that of non-firearm injury group (P<0.05). The comminuted fractures treated with tantalum cylinders exhibited greater bone ingrowth in the firearm injury group. In conditions of firearm injuries, the <span class="hlt">porous</span> tantalum biomaterial exhibited bone ingrowth that was beneficial to the treatment of bone defects.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015EGUGA..17.7867J','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015EGUGA..17.7867J"><span id="translatedtitle">Thermo-Hydro-Mechanical Evolution of Transport Properties in <span class="hlt">Porous</span> Media: From Laboratory to the Groß-Schönebeck Geothermal Reservoir.</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Jacquey, Antoine; Cacace, Mauro; Blöcher, Guido; Watanabe, Norihiro; Scheck-Wenderoth, Magadalena</p> <p>2015-04-01</p> <p>Quantifying variations of transport properties of <span class="hlt">porous</span> material, which are porosity and permeability is of special interest for geothermal applications. Variations of these properties result from the coupling between rock deformation and thermal processes. Significant pore pressure and temperature changes can occur during injection and production of fluid. Such changes have a direct <span class="hlt">impact</span> on the stress-field affecting the geothermal reservoir performance. Understanding the coupling between deformation of the <span class="hlt">porous</span> material and variation of its properties for mass and energy transfer is therefore a major focus for any geothermal operations. Deformation of a <span class="hlt">porous</span> material filled with fluid is based on variations of bulk and pore volumes and affects therefore the basic transport properties of the rock. Variations of the transport properties can be expressed by theoretical formulations based on experimental observations and then integrated into numerical models which can be used to predict reservoir performance at the field scale. The aim of this study is to develop a complete poro- and thermoelastic formulation capable of explaining and quantifying fluid-rock interactions in a context of geothermal applications. In a first step, formulations to quantify porosity variations are tested with the open-source finite element method based software OpenGeoSys (Kolditz et al. 2012) and compared to laboratory experiments to constrain the parameters <span class="hlt">involved</span>. Numerical description of the physical phenomena <span class="hlt">involved</span> for such behavior requires to account for the coupling between deformation, thermal and hydraulic processes and the relations between different scales. Three different formulations with H-M coupling are studied which are based on the theories of poroelasticity and crack closure (Zimmerman 1991, Blöcher et al. 2013 and Chin et al. 2000). These three formulations are tested on two different kinds of sandstones (Flechtinger and Bentheimer sandstones) by comparing</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li class="active"><span>22</span></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_22 --> <div id="page_23" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li class="active"><span>23</span></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li><a href="#" onclick='return showDiv("page_25");'>25</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="441"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2003PhDT.......242L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2003PhDT.......242L"><span id="translatedtitle">Wave propagation through <span class="hlt">porous</span> media containing two immiscible fluids</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Lo, Wei-Cheng</p> <p></p> <p> by the inclusion of relative acceleration vectors as independent constitutive variables. The resulting momentum balance equations governing immiscible two-phase flows in deformable <span class="hlt">porous</span> media then account for the reaction of fluids to an acceleration of the solid matrix. A mathematical model was proposed to quantify the <span class="hlt">impact</span> of elastic wave excitation on a fluid-containing <span class="hlt">porous</span> medium by formulating a boundary value problem for a core sample packed with unconsolidated sand permeated by water, a simpler system than current laboratory experiments investigating seismic stimulation. (Abstract shortened by UMI.)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016EJPh...37e5102C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016EJPh...37e5102C"><span id="translatedtitle">Fluid dynamics in <span class="hlt">porous</span> media with Sailfish</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Coelho, Rodrigo C. V.; Neumann, Rodrigo F.</p> <p>2016-09-01</p> <p>In this work we show the application of Sailfish to the study of fluid dynamics in <span class="hlt">porous</span> media. Sailfish is an open-source software based on the lattice-Boltzmann method. This application of computational fluid dynamics is of particular interest to the oil and gas industry and the subject could be a starting point for an undergraduate or graduate student in physics or engineering. We built artificial samples of <span class="hlt">porous</span> media with different porosities and used Sailfish to simulate the fluid flow through them in order to calculate their permeability and tortuosity. We also present a simple way to obtain the specific superficial area of <span class="hlt">porous</span> media using Python libraries. To contextualise these concepts, we analyse the applicability of the Kozeny-Carman equation, which is a well-known permeability-porosity relation, to our artificial samples.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/21618747','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/21618747"><span id="translatedtitle">Magnetic and <span class="hlt">porous</span> molecule-based materials.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Roques, Nans; Mugnaini, Veronica; Veciana, Jaume</p> <p>2010-01-01</p> <p>In this chapter, we give an overview of the recent state-of-the-art research of <span class="hlt">porous</span> and magnetic molecule-based materials. The subject is introduced by a section devoted to the fundamentals of magnetism in molecular magnets, with special attention to the design strategies to prepare molecular magnetic materials. We will then focus on the two main families of materials combining porosity and magnetism: the purely organic and the metal-organic <span class="hlt">porous</span> magnetic materials. For both families, a selection of the most representative examples has been made. A complete section is devoted to magnetic and <span class="hlt">porous</span> materials with flexible frameworks, an area of emerging importance in this field, because of their wide range of applications. Finally, we conclude with a brief overview on the most recent approaches for the future development of these materials.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016HyInt.237..105Y','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016HyInt.237..105Y"><span id="translatedtitle">Iron films deposited on <span class="hlt">porous</span> alumina substrates</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Yamada, Yasuhiro; Tanabe, Kenichi; Nishida, Naoki; Kobayashi, Yoshio</p> <p>2016-12-01</p> <p>Iron films were deposited on <span class="hlt">porous</span> alumina substrates using an arc plasma gun. The pore sizes (120 - 250 nm) of the substrates were controlled by changing the temperature during the anodic oxidation of aluminum plates. Iron atoms penetrated into pores with diameters of less than 160 nm, and were stabilized by forming γ-Fe, whereas α-Fe was produced as a flat plane covering the pores. For <span class="hlt">porous</span> alumina substrates with pore sizes larger than 200 nm, the deposited iron films contained many defects and the resulting α-Fe had smaller hyperfine magnetic fields. In addition, only a very small amount of γ-Fe was obtained. It was demonstrated that the composition and structure of an iron film can be affected by the surface morphology of the <span class="hlt">porous</span> alumina substrate on which the film is grown.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2002ApSS..195..117D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2002ApSS..195..117D"><span id="translatedtitle">Sorption properties of <span class="hlt">porous</span> melamine formaldehyde resins</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Deryło-Marczewska, Anna; Goworek, Jacek; Kusak, Ryszard; Zgrajka, Wojciech</p> <p>2002-07-01</p> <p>Three types of melamine-formaldehyde <span class="hlt">porous</span> sorbents were synthesized by using the fumed silica as an inorganic template. The changes in polymerization conditions lead to a differentiation of the porosity and surface area of these materials. This synthesis allowed preparing the materials of narrow pore size distributions with pore sizes over the range 2.8-6.8 nm, and specific surface areas up to 250 m 2/g. The analysis of pore structure was based on the comparison of nitrogen adsorption isotherms on a given <span class="hlt">porous</span> sorbent and a standard nonporous polymer. Additionally the measurements of thermal stability and swelling of synthesized polymers were made. Adsorption of organic substances from aqueous solutions on <span class="hlt">porous</span> polymers was also investigated.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/867359','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/867359"><span id="translatedtitle">Joining of <span class="hlt">porous</span> silicon carbide bodies</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Bates, Carl H.; Couhig, John T.; Pelletier, Paul J.</p> <p>1990-05-01</p> <p>A method of joining two <span class="hlt">porous</span> bodies of silicon carbide is disclosed. It entails utilizing an aqueous slip of a similar silicon carbide as was used to form the <span class="hlt">porous</span> bodies, including the sintering aids, and a binder to initially join the <span class="hlt">porous</span> bodies together. Then the composite structure is subjected to cold isostatic pressing to form a joint having good handling strength. Then the composite structure is subjected to pressureless sintering to form the final strong bond. Optionally, after the sintering the structure is subjected to hot isostatic pressing to further improve the joint and densify the structure. The result is a composite structure in which the joint is almost indistinguishable from the silicon carbide pieces which it joins.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016AIPC.1728b0547A','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016AIPC.1728b0547A"><span id="translatedtitle">Investigation of heat transfer in <span class="hlt">porous</span> duct</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Athani, Abdulgaphur; Khan, T. M. Yunus</p> <p>2016-05-01</p> <p>Investigation of heat transfer in a square <span class="hlt">porous</span> duct is carried out. The <span class="hlt">porous</span> medium is sandwiched between inner and outer surface of a square duct. The flow is assumed to follow the Darcy law. The governing momentum and energy equations are non-dimensionalised and then converted to algebraic form of equations using finite element method. Galerkin method is used to transform the partial differential equations into simpler algebraic equations then solved in a iterative manner to arrive at the solution. The results are presented with respect to various geometric and physical parameters such as depth of <span class="hlt">porous</span> medium, Rayleigh number etc. It is found that the isotherms and the streamlines take symmetrical position along the vertical central line of square duct. The isotherms are penetrated into deeper area at upper half of duct as compared to lower half.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011APS..DFDG25003G','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011APS..DFDG25003G"><span id="translatedtitle">A liquid bridge connecting moving <span class="hlt">porous</span> surfaces</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Gharib, Morteza; Gat, Amir; Navaz, Homayun</p> <p>2011-11-01</p> <p>We study the coupled problem of a liquid bridge connecting two <span class="hlt">porous</span> surfaces where the gap between the surfaces is an externally controlled function of time. The relative motion between the surfaces affects the geometry and the pressure distribution of the liquid bridge, thus influencing the diffusion speed and penetration topology within the <span class="hlt">porous</span> material. Utilizing the lubrication approximation and Darcy's phenomenological law we obtain a relation between the diffusion into the <span class="hlt">porous</span> surface and the relative motion between the surfaces. A scheme to control the diffusion topology is presented and illustrated for the case of conical penetration topology with an arbitrary cone opening angle. Analytic expressions describing the penetration topology for the case of constant speed of the surfaces and the relative motion between the surfaces required to create a conical penetration topology are obtained and compared to experimental and numerical data. This project was supported by the Defense Threat Reduction Agency (DTRA), Award Number: 330233-A.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/20442561','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/20442561"><span id="translatedtitle">Ear reconstruction with <span class="hlt">porous</span> polyethylene implants.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Berghaus, Alexander; Stelter, Klaus; Naumann, Andreas; Hempel, John Martin</p> <p>2010-01-01</p> <p>This article describes a surgical technique using <span class="hlt">porous</span> polyethylene as the framework material for ear reconstruction. In comparison to the use of rib cartilage, <span class="hlt">porous</span> polyethylene - first described by Berghaus in 1982 - provides better definition and projection as well as congruency with the opposite side. Hospitalization time is significantly shorter. There are less surgical interventions than with traditional microtia operations that use rib cartilage, and the patient is spared the additional procedure needed to remove the rib cartilage, with all the associated complications as well as the resulting thorax scar. Also, reconstruction can take place at an earlier age, which is advantageous for those concerned. Using <span class="hlt">porous</span> polyethylene as the frame material, a temporoparietal flap and full-thickness skin cover, we have been able to achieve very convincing results over recent years.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015EPJST.224.2949R','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015EPJST.224.2949R"><span id="translatedtitle"><span class="hlt">Porous</span> ferroelectrics for energy harvesting applications</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Roscow, J.; Zhang, Y.; Taylor, J.; Bowen, C. R.</p> <p>2015-11-01</p> <p>This paper provides an overview of energy harvesting using ferroelectric materials, with a particular focus on the energy harvesting capabilities of <span class="hlt">porous</span> ferroelectric ceramics for both piezo- and pyroelectric harvesting. The benefits of introducing porosity into ferro- electrics such as lead zirconate titanate (PZT) has been known for over 30 years, but the potential advantages for energy harvesting from both ambient vibrations and temperature fluctuations have not been studied in depth. The article briefly discusses piezoelectric and pyro- electric energy harvesting, before evaluating the potential benefits of <span class="hlt">porous</span> materials for increasing energy harvesting figures of merits and electromechanical/electrothermal coupling factors. Established processing routes are evaluated in terms of the final <span class="hlt">porous</span> structure and the resulting effects on the electrical, thermal and mechanical properties.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2016EJPh...37e5102C&link_type=ABSTRACT','NASAADS'); return false;" href="http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2016EJPh...37e5102C&link_type=ABSTRACT"><span id="translatedtitle">Fluid dynamics in <span class="hlt">porous</span> media with Sailfish</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Coelho, Rodrigo C. V.; Neumann, Rodrigo F.</p> <p>2016-09-01</p> <p>In this work we show the application of Sailfish to the study of fluid dynamics in <span class="hlt">porous</span> media. Sailfish is an open-source software based on the lattice-Boltzmann method. This application of computational fluid dynamics is of particular interest to the oil and gas industry and the subject could be a starting point for an undergraduate or graduate student in physics or engineering. We built artificial samples of <span class="hlt">porous</span> media with different porosities and used Sailfish to simulate the fluid flow through them in order to calculate their permeability and tortuosity. We also present a simple way to obtain the specific superficial area of <span class="hlt">porous</span> media using Python libraries. To contextualise these concepts, we analyse the applicability of the Kozeny–Carman equation, which is a well-known permeability–porosity relation, to our artificial samples.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2007ZaMP...58..646S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2007ZaMP...58..646S"><span id="translatedtitle">Flow past a <span class="hlt">porous</span> approximate spherical shell</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Srinivasacharya, D.</p> <p>2007-07-01</p> <p>In this paper, the creeping flow of an incompressible viscous liquid past a <span class="hlt">porous</span> approximate spherical shell is considered. The flow in the free fluid region outside the shell and in the cavity region of the shell is governed by the Navier Stokes equation. The flow within the <span class="hlt">porous</span> annulus region of the shell is governed by Darcy’s Law. The boundary conditions used at the interface are continuity of the normal velocity, continuity of the pressure and Beavers and Joseph slip condition. An exact solution for the problem is obtained. An expression for the drag on the <span class="hlt">porous</span> approximate spherical shell is obtained. The drag experienced by the shell is evaluated numerically for several values of the parameters governing the flow.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015CQGra..32v4010W','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015CQGra..32v4010W"><span id="translatedtitle"><span class="hlt">Porous</span> plug for Gravity Probe B</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Wang, Suwen; Everitt, C. W. Francis; Frank, David J.; Lipa, John A.; Muhlfelder, Barry F.</p> <p>2015-11-01</p> <p>The confinement of superfluid helium for a Dewar in space poses a unique challenge due to its propensity to minimize thermal gradients by essentially viscous-free counterflow. This poses the risk of losing liquid through a vent pipe, reducing the efficiency of the cooling process. To confine the liquid helium in the Gravity Probe B (GP-B) flight Dewar, a <span class="hlt">porous</span> plug technique was invented at Stanford University. Here, we review the history of the <span class="hlt">porous</span> plug and its development, and describe the physics underlying its operation. We summarize a few missions that employed <span class="hlt">porous</span> plugs, some of which preceded the launch of GP-B. The design, manufacture and flight performance of the GP-B plug are described, and its use resulted in the successful operation of the 2441 l flight Dewar on-orbit for 17.3 months.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2005AGUFM.H21E1383A','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2005AGUFM.H21E1383A"><span id="translatedtitle">Cryptosporidium Parvum Transport Through Natural <span class="hlt">Porous</span> Media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Araujo, J. B.; Santamaria, J.; Blandford, W. P.; Gerba, C. P.; Brusseau, M. L.</p> <p>2005-12-01</p> <p>The objective of this study was to quantify the transport of Cryptosporidium parvum through saturated natural <span class="hlt">porous</span> media. A series of miscible-displacement experiments were conducted, varying the properties of the <span class="hlt">porous</span> media and electrolyte solution to help elucidate retention mechanisms. Significant removal (~99%) of oocysts was observed for transport in a sandy soil. Similar removals were also observed for experiments conducted with deionized water in place of the 0.01M NaCl electrolyte solution and experiments with a sub sample of the sandy soil that was treated with nitric acid. Effluent recoveries were greater for experiments conducted using coarser <span class="hlt">porous</span> media. These results indicate straining contributed to the retention of Cryptosporidium parvum in our system.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/12750792','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/12750792"><span id="translatedtitle">Identification and mapping of a major gene (Ft1) <span class="hlt">involved</span> in fructification time in the interspecific cross Coffea pseudozanguebariae x C. liberica var. Dewevrei: <span class="hlt">impact</span> on caffeine content and seed weight.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Akaffou, D S; Ky, C L; Barre, P; Hamon, S; Louarn, J; Noirot, M</p> <p>2003-05-01</p> <p>Fructification time was studied in the interspecific cross Coffea pseudozanguebariae x C. liberica var. Dewevrei (PSE x DEW). Parental species, F(1) hybrids and offspring of the first backcross generation (BC(1)), consisting of F(1) x PSE (BCPSE) and F(1) x DEW (BCDEW) plants, were observed. Fructification time can be split into two independent visual phases: the full-growth period, from blooming up to the end of fruit growth, and the maturation phase, defined by the green to red color change. Fructification time was found to be an additive trait. The full-growth period showed a bimodal distribution in the BCDEW hybrid, suggesting the <span class="hlt">involvement</span> of Ft1, a major gene that was mapped on linkage group E. The main effects of Ft1 were to lower caffeine content and 100-seed weight, without any <span class="hlt">impact</span> on chlorogenic acid, trigonelline and sucrose contents. Two molecular markers were identified that bracket Ft1 and which could be used for early marker-assisted selection.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25047379','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25047379"><span id="translatedtitle">Tools, harmonization and standardization procedures of the <span class="hlt">impact</span> and outcome evaluation indices obtained during a kindergarten-based, family-<span class="hlt">involved</span> intervention to prevent obesity in early childhood: the ToyBox-study.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Mouratidou, T; Miguel, M L; Androutsos, O; Manios, Y; De Bourdeaudhuij, I; Cardon, G; Kulaga, Z; Socha, P; Galcheva, S; Iotova, V; Payr, A; Koletzko, B; Moreno, L A</p> <p>2014-08-01</p> <p>The ToyBox-intervention is a kindergarten-based, family-<span class="hlt">involved</span> intervention targeting multiple lifestyle behaviours in preschool children, their teachers and their families. This intervention was conducted in six European countries, namely Belgium, Bulgaria, Germany, Greece, Poland and Spain. The aim of this paper is to provide a descriptive overview of the harmonization and standardization procedures of the baseline and follow-up evaluation of the study (and substudies). Steps related to the study's operational, standardization and harmonization procedures as well as the <span class="hlt">impact</span> and outcome evaluation assessment tools used are presented. Experiences from the project highlight the importance of safeguarding the measurement process to minimize data heterogeneity derived from potential measurement error and country-by-country differences. In addition, it was made clear that continuing quality control and support is an important component of such studies. For this reason, well-supported communication channels, such as regular email updates and teleconferences, and regular internal and external meetings to ensure smooth and accurate implementation were in place during the study. The ToyBox-intervention and its harmonized and standardized procedures can serve as a successful case study for future studies evaluating the efficacy of similar interventions.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24411349','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24411349"><span id="translatedtitle">Hydroxyapatite-silver nanoparticles coatings on <span class="hlt">porous</span> polyurethane scaffold.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Ciobanu, Gabriela; Ilisei, Simona; Luca, Constantin</p> <p>2014-02-01</p> <p>The present paper is focused on a study regarding the possibility of obtaining hydroxyapatite-silver nanoparticle coatings on <span class="hlt">porous</span> polyurethane scaffold. The method applied is based on a combined strategy <span class="hlt">involving</span> hydroxyapatite biomimetic deposition on polyurethane surface using a Supersaturated Calcification Solution (SCS), combined with silver ions reduction and in-situ crystallization processes on hydroxyapatite-polyurethane surface by sample immersing in AgNO3 solution. The morphology, composition and phase structure of the prepared samples were characterized by scanning electron microscopy coupled with energy dispersive X-ray spectroscopy (SEM-EDX), X-ray diffraction (XRD), UV-Vis spectroscopy and X-ray photoelectron spectroscopy (XPS) measurements. The data obtained show that a layer of hydroxyapatite was deposited on <span class="hlt">porous</span> polyurethane support and the silver nanoparticles (average size 34.71 nm) were dispersed among and even on the hydroxyapatite crystals. Hydroxyapatite/polyurethane surface acts as a reducer and a stabilizing agent for silver ions. The surface plasmon resonance peak in UV-Vis absorption spectra showed an absorption maximum at 415 nm, indicating formation of silver nanoparticles. The hydroxyapatite-silver polyurethane scaffolds were tested against Staphylococcus aureus and Escherichia coli and the obtained data were indicative of good antibacterial properties of the materials.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1996PApGe.147...25C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1996PApGe.147...25C"><span id="translatedtitle">Absorption of strain waves in <span class="hlt">porous</span> media at seismic frequencies</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Chelidze, T. L.; Spetzler, H. A.; Sobolev, G. A.</p> <p>1996-06-01</p> <p>An understanding of strain wave propagation in fluid containing <span class="hlt">porous</span> rocks is important in reservoir geophysics and in the monitoring in underground water in the vicinity of nuclear and toxic waste sites, earthquake prediction, etc. Both experimental and theoretical research are far from providing a complete explanation of dissipation mechanisms, especially the observation of an unexpectedly strong dependence of attenuation Q -1 on the chemistry of the solid and liquid phase <span class="hlt">involved</span>. Traditional theories of proelasticity do not take these effects into account. In this paper the bulk of existing experimental data and theoretical models is reviewed briefly in order to elecidate the effect of environmental factors on the attenuation of seismic waves. Low fluid concentrations are emphasized. Thermodynamical analysis shows that changes in surface energy caused by weak mechanical disturbances can explain observed values of attenuation in real rocks. Experimental dissipation isotherms are interpreted in terms of monolayered surface adsorption of liquid films as described by Langmuir's equation. In order to describe surface dissipation in consolidated rocks, a surface tension term is added to the pore pressure term in the O'Connell-Budiansky proelastic equation for effective moduli of <span class="hlt">porous</span> and fractured rocks. Theoretical calculations by this modified model, using reasonable values for elastic parameters, surface energy, crack density and their geometry, lead to results which qualitatively agree with experimental data obtained at low fluid contents.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/15005278','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/15005278"><span id="translatedtitle">Synthesis and characterization of <span class="hlt">porous</span> hydroxyapatite and hydroxyapatite coatings</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Nieh, T G; Choi, B W; Jankowski, A F</p> <p>2000-10-25</p> <p>A technique is developed to construct bulk hydroxyapatite (HAp) with different cellular structures. The technique <span class="hlt">involves</span> the initial synthesis of nanocrystalline hydroxyapatite powder from an aqueous solution using water-soluble compounds and then followed by spray drying into agglomerated granules. The granules were further cold pressed and sintered into bulks at elevated temperatures. The sintering behavior of the HAp granules was characterized and compared with those previously reported. Resulting from the fact that the starting HAp powders were extremely fine, a relatively low activation energy for sintering was obtained. In the present study, both <span class="hlt">porous</span> and dense structures were produced by varying powder morphology and sintering parameters. <span class="hlt">Porous</span> structures consisting of open cells were constructed. Sintered structures were characterized using scanning electron microscopy and x-ray tomography. In the present paper, hydroxyapatite coatings produced by magnetron sputtering on silicon and titanium substrates will also be presented. The mechanical properties of the coatings were measured using nanoindentation techniques and microstructures examined using transmission electron microscopy.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22781743','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22781743"><span id="translatedtitle">Ultrafast excited state deactivation of doped <span class="hlt">porous</span> anodic alumina membranes.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Makhal, Abhinandan; Sarkar, Soumik; Pal, Samir Kumar; Yan, Hongdan; Wulferding, Dirk; Cetin, Fatih; Lemmens, Peter</p> <p>2012-08-01</p> <p>Free-standing, bi-directionally permeable and ultra-thin anodic aluminum oxide (AAO) membranes establish attractive templates (host) for the synthesis of nano-dots and rods of various materials (guest). This is due to their chemical and structural integrity and high periodicity on length scales of 5-150 nm which are often used to host photoactive nano-materials for various device applications including dye-sensitized solar cells. In the present study, AAO membranes are synthesized by using electrochemical methods and a detailed structural characterization using FEG-SEM, XRD and TGA confirms the porosity and purity of the material. Defect-mediated photoluminescence quenching of the <span class="hlt">porous</span> AAO membrane in the presence of an electron accepting guest organic molecule (benzoquinone) is studied by means of steady-state and picosecond/femtosecond-resolved luminescence measurements. Using time-resolved luminescence transients, we have also revealed light harvesting of complexes of <span class="hlt">porous</span> alumina impregnated with inorganic quantum dots (Maple Red) or gold nanowires. Both the Förster resonance energy transfer and the nano-surface energy transfer techniques are employed to examine the observed quenching behavior as a function of the characteristic donor-acceptor distances. The experimental results will find their relevance in light harvesting devices based on AAOs combined with other materials <span class="hlt">involving</span> a decisive energy/charge transfer dynamics.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li class="active"><span>23</span></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li><a href="#" onclick='return showDiv("page_25");'>25</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_23 --> <div id="page_24" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li class="active"><span>24</span></li> <li><a href="#" onclick='return showDiv("page_25");'>25</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="461"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19730000164','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19730000164"><span id="translatedtitle">Liquid metal <span class="hlt">porous</span> matrix sliding electrical contact: A concept</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Ferguson, H.</p> <p>1973-01-01</p> <p>Concept utilizes <span class="hlt">porous</span> metal or nonmetal matrix containing liquid metal in <span class="hlt">porous</span> structure and confines liquid metal to contact area between rotor and brush by capillary forces. System may also be used to lubricate bearing systems.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26920663','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26920663"><span id="translatedtitle">Synthesis, characterization, and evaluation of a superficially <span class="hlt">porous</span> particle with unique, elongated pore channels normal to the surface.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wei, Ta-Chen; Mack, Anne; Chen, Wu; Liu, Jia; Dittmann, Monika; Wang, Xiaoli; Barber, William E</p> <p>2016-04-01</p> <p>In recent years, superficially <span class="hlt">porous</span> particles (SPPs) have drawn great interest because of their special particle characteristics and improvement in separation efficiency. Superficially <span class="hlt">porous</span> particles are currently manufactured by adding silica nanoparticles onto solid cores using either a multistep multilayer process or one-step coacervation process. The pore size is mainly controlled by the size of the silica nanoparticles and the tortuous pore channel geometry is determined by how those nanoparticles randomly aggregate. Such tortuous pore structure is also similar to that of all totally <span class="hlt">porous</span> particles used in HPLC today. In this article, we report on the development of a next generation superficially <span class="hlt">porous</span> particle with a unique pore structure that includes a thinner shell thickness and ordered pore channels oriented normal to the particle surface. The method of making the new superficially <span class="hlt">porous</span> particles is a process called pseudomorphic transformation (PMT), which is a form of micelle templating. Porosity is no longer controlled by randomly aggregated nanoparticles but rather by micelles that have an ordered liquid crystal structure. The new particle possesses many advantages such as a narrower particle size distribution, thinner <span class="hlt">porous</span> layer with high surface area and, most importantly, highly ordered, non-tortuous pore channels oriented normal to the particle surface. This PMT process has been applied to make 1.8-5.1μm SPPs with pore size controlled around 75Å and surface area around 100m(2)/g. All particles with different sizes show the same unique pore structure with tunable pore size and shell thickness. The <span class="hlt">impact</span> of the novel pore structure on the performance of these particles is characterized by measuring van Deemter curves and constructing kinetic plots. Reduced plate heights as low as 1.0 have been achieved on conventional LC instruments. This indicates higher efficiency of such particles compared to conventional totally <span class="hlt">porous</span> and</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/22213663','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/22213663"><span id="translatedtitle">Explosion propagation in inert <span class="hlt">porous</span> media.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Ciccarelli, G</p> <p>2012-02-13</p> <p><span class="hlt">Porous</span> media are often used in flame arresters because of the high surface area to volume ratio that is required for flame quenching. However, if the flame is not quenched, the flow obstruction within the <span class="hlt">porous</span> media can promote explosion escalation, which is a well-known phenomenon in obstacle-laden channels. There are many parallels between explosion propagation through <span class="hlt">porous</span> media and obstacle-laden channels. In both cases, the obstructions play a duel role. On the one hand, the obstruction enhances explosion propagation through an early shear-driven turbulence production mechanism and then later by shock-flame interactions that occur from lead shock reflections. On the other hand, the presence of an obstruction can suppress explosion propagation through momentum and heat losses, which both impede the unburned gas flow and extract energy from the expanding combustion products. In obstacle-laden channels, there are well-defined propagation regimes that are easily distinguished by abrupt changes in velocity. In <span class="hlt">porous</span> media, the propagation regimes are not as distinguishable. In <span class="hlt">porous</span> media the entire flamefront is affected, and the effects of heat loss, turbulence and compressibility are smoothly blended over most of the propagation velocity range. At low subsonic propagation speeds, heat loss to the <span class="hlt">porous</span> media dominates, whereas at higher supersonic speeds turbulence and compressibility are important. This blending of the important phenomena results in no clear transition in propagation mechanism that is characterized by an abrupt change in propagation velocity. This is especially true for propagation velocities above the speed of sound where many experiments performed with fuel-air mixtures show a smooth increase in the propagation velocity with mixture reactivity up to the theoretical detonation wave velocity. PMID:22213663</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014JCHyd.166...23G','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014JCHyd.166...23G"><span id="translatedtitle">Guar gum solutions for improved delivery of iron particles in <span class="hlt">porous</span> media (Part 1): <span class="hlt">Porous</span> medium rheology and guar gum-induced clogging</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Gastone, Francesca; Tosco, Tiziana; Sethi, Rajandrea</p> <p>2014-10-01</p> <p>The present work is the first part of a comprehensive study on the use of guar gum to improve delivery of microscale zero-valent iron particles in contaminated aquifers. Guar gum solutions exhibit peculiar shear thinning properties, with high viscosity in static conditions and lower viscosity in dynamic conditions: this is beneficial both for the storage of MZVI dispersions, and also for the injection in <span class="hlt">porous</span> media. In the present paper, the processes associated with guar gum injection in <span class="hlt">porous</span> media are studied performing single-step and multi-step filtration tests in sand-packed columns. The experimental results of single-step tests performed by injecting guar gum solutions prepared at several concentrations and applying different dissolution procedures evidenced that the presence of residual undissolved polymeric particles in the guar gum solution may have a relevant negative <span class="hlt">impact</span> on the permeability of the <span class="hlt">porous</span> medium, resulting in evident clogging. The most effective preparation procedure which minimizes the presence of residual particles is dissolution in warm water (60 °C) followed by centrifugation (procedure T60C). The multi-step tests (i.e. injection of guar gum at constant concentration with a step increase of flow velocity), performed at three polymer concentrations (1.5, 3 and 4 g/l) provided information on the rheological properties of guar gum solutions when flowing through a <span class="hlt">porous</span> medium at variable discharge rates, which mimic the injection in radial geometry. An experimental protocol was defined for the rheological characterization of the fluids in <span class="hlt">porous</span> media, and empirical relationships were derived for the quantification of rheological properties and clogging with variable injection rate. These relationships will be implemented in the second companion paper (Part II) in a radial transport model for the simulation of large-scale injection of MZVI-guar gum slurries.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/25065767','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/25065767"><span id="translatedtitle">Guar gum solutions for improved delivery of iron particles in <span class="hlt">porous</span> media (part 1): <span class="hlt">porous</span> medium rheology and guar gum-induced clogging.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Gastone, Francesca; Tosco, Tiziana; Sethi, Rajandrea</p> <p>2014-10-01</p> <p>The present work is the first part of a comprehensive study on the use of guar gum to improve delivery of microscale zero-valent iron particles in contaminated aquifers. Guar gum solutions exhibit peculiar shear thinning properties, with high viscosity in static conditions and lower viscosity in dynamic conditions: this is beneficial both for the storage of MZVI dispersions, and also for the injection in <span class="hlt">porous</span> media. In the present paper, the processes associated with guar gum injection in <span class="hlt">porous</span> media are studied performing single-step and multi-step filtration tests in sand-packed columns. The experimental results of single-step tests performed by injecting guar gum solutions prepared at several concentrations and applying different dissolution procedures evidenced that the presence of residual undissolved polymeric particles in the guar gum solution may have a relevant negative <span class="hlt">impact</span> on the permeability of the <span class="hlt">porous</span> medium, resulting in evident clogging. The most effective preparation procedure which minimizes the presence of residual particles is dissolution in warm water (60°C) followed by centrifugation (procedure T60C). The multi-step tests (i.e. injection of guar gum at constant concentration with a step increase of flow velocity), performed at three polymer concentrations (1.5, 3 and 4g/l) provided information on the rheological properties of guar gum solutions when flowing through a <span class="hlt">porous</span> medium at variable discharge rates, which mimic the injection in radial geometry. An experimental protocol was defined for the rheological characterization of the fluids in <span class="hlt">porous</span> media, and empirical relationships were derived for the quantification of rheological properties and clogging with variable injection rate. These relationships will be implemented in the second companion paper (Part II) in a radial transport model for the simulation of large-scale injection of MZVI-guar gum slurries. PMID:25065767</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25065767','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25065767"><span id="translatedtitle">Guar gum solutions for improved delivery of iron particles in <span class="hlt">porous</span> media (part 1): <span class="hlt">porous</span> medium rheology and guar gum-induced clogging.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Gastone, Francesca; Tosco, Tiziana; Sethi, Rajandrea</p> <p>2014-10-01</p> <p>The present work is the first part of a comprehensive study on the use of guar gum to improve delivery of microscale zero-valent iron particles in contaminated aquifers. Guar gum solutions exhibit peculiar shear thinning properties, with high viscosity in static conditions and lower viscosity in dynamic conditions: this is beneficial both for the storage of MZVI dispersions, and also for the injection in <span class="hlt">porous</span> media. In the present paper, the processes associated with guar gum injection in <span class="hlt">porous</span> media are studied performing single-step and multi-step filtration tests in sand-packed columns. The experimental results of single-step tests performed by injecting guar gum solutions prepared at several concentrations and applying different dissolution procedures evidenced that the presence of residual undissolved polymeric particles in the guar gum solution may have a relevant negative <span class="hlt">impact</span> on the permeability of the <span class="hlt">porous</span> medium, resulting in evident clogging. The most effective preparation procedure which minimizes the presence of residual particles is dissolution in warm water (60°C) followed by centrifugation (procedure T60C). The multi-step tests (i.e. injection of guar gum at constant concentration with a step increase of flow velocity), performed at three polymer concentrations (1.5, 3 and 4g/l) provided information on the rheological properties of guar gum solutions when flowing through a <span class="hlt">porous</span> medium at variable discharge rates, which mimic the injection in radial geometry. An experimental protocol was defined for the rheological characterization of the fluids in <span class="hlt">porous</span> media, and empirical relationships were derived for the quantification of rheological properties and clogging with variable injection rate. These relationships will be implemented in the second companion paper (Part II) in a radial transport model for the simulation of large-scale injection of MZVI-guar gum slurries.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/16324681','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/16324681"><span id="translatedtitle">Review on subsurface colloids and colloid-associated contaminant transport in saturated <span class="hlt">porous</span> media.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Kanti Sen, Tushar; Khilar, Kartic C</p> <p>2006-02-28</p> <p>In this review article, the authors present up-to-date developments on experimental, modeling and field studies on the role of subsurface colloidal fines on contaminant transport in saturated <span class="hlt">porous</span> media. It is a complex phenomenon in <span class="hlt">porous</span> media <span class="hlt">involving</span> several basic processes such as colloidal fines release, dispersion stabilization, migration and fines entrapment/plugging at the pore constrictions and adsorption at solid/liquid interface. The effects of these basic processes on the contaminant transport have been compiled. Here the authors first present the compilation on in situ colloidal fines sources, release, stabilization of colloidal dispersion and migration which are a function of physical and chemical conditions of subsurface environment and finally their role in inorganic and organic contaminants transport in <span class="hlt">porous</span> media. The important aspects of this article are as follows: (i) it gives not only complete compilation on colloidal fines-facilitated contaminant transport but also reviews the new role of colloidal fines in contaminant retardation due to plugging of pore constrictions. This plugging phenomenon also depends on various factors such as concentration of colloidal fines, superficial velocity and bead-to-particle size ratio. This plugging-based contaminant transport can be used to develop containment technique in soil and groundwater remediation. (ii) It also presents the importance of critical salt concentration (CSC), critical ionic strength for mixed salt, critical shear stressor critical particle concentration (CPC) on in situ colloidal fines release and migration and consequently their role on contaminant transport in <span class="hlt">porous</span> media. (iii) It also reviews another class of colloidal fines called biocolloids and their transport in <span class="hlt">porous</span> media. Finally, the authors highlight the future research based on their critical review on colloid-associated contaminant transport in saturated <span class="hlt">porous</span> media. PMID:16324681</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23323515','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23323515"><span id="translatedtitle">Photoelectrochemical properties of cadmium chalcogenide-sensitized textured <span class="hlt">porous</span> zinc oxide plate electrodes.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Emin, Saim; Fanetti, Mattia; Abdi, Fatwa F; Lisjak, Darja; Valant, Matjaz; van de Krol, Roel; Dam, Bernard</p> <p>2013-02-01</p> <p>We report the photoelectrochemical (PEC) performance of textured <span class="hlt">porous</span> ZnO and CdX-coated ZnO films (X = S, Se). <span class="hlt">Porous</span> ZnO films were grown with a platelike morphology on F-doped SnO(2) (FTO) substrates. The growth of ZnO films <span class="hlt">involves</span> a two-step procedure. In the first step, we electrochemically grew simonkolleite (Zn(5)(OH)(8)Cl(2)·H(2)O) plate films. Annealing of the simonkolleite at 450 °C results in textured <span class="hlt">porous</span> ZnO films. The as-obtained <span class="hlt">porous</span> ZnO electrodes were then used in PEC studies. To increase the light-harvesting efficiency, we sensitized these ZnO electrodes with CdS and CdSe quantum dots, using the so-called "successive ion layer adsorption and reaction (SILAR) method". As expected, the photocurrent density systematically increases when going from ZnO to ZnO/CdS to ZnO/CdSe. The highest photocurrent, ∼3.1 mA/cm(2) at 1.2 V vs RHE, was obtained in the CdSe-sensitized ZnO electrodes, because of their enhanced absorption in the visible range. Additionally, quantum efficiency values as high as 90% were achieved with the textured <span class="hlt">porous</span> ZnO films. These results demonstrate that both CdS and CdSe-sensitized textured <span class="hlt">porous</span> ZnO electrodes could be potentially useful materials in light-harvesting applications.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/16324681','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/16324681"><span id="translatedtitle">Review on subsurface colloids and colloid-associated contaminant transport in saturated <span class="hlt">porous</span> media.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Kanti Sen, Tushar; Khilar, Kartic C</p> <p>2006-02-28</p> <p>In this review article, the authors present up-to-date developments on experimental, modeling and field studies on the role of subsurface colloidal fines on contaminant transport in saturated <span class="hlt">porous</span> media. It is a complex phenomenon in <span class="hlt">porous</span> media <span class="hlt">involving</span> several basic processes such as colloidal fines release, dispersion stabilization, migration and fines entrapment/plugging at the pore constrictions and adsorption at solid/liquid interface. The effects of these basic processes on the contaminant transport have been compiled. Here the authors first present the compilation on in situ colloidal fines sources, release, stabilization of colloidal dispersion and migration which are a function of physical and chemical conditions of subsurface environment and finally their role in inorganic and organic contaminants transport in <span class="hlt">porous</span> media. The important aspects of this article are as follows: (i) it gives not only complete compilation on colloidal fines-facilitated contaminant transport but also reviews the new role of colloidal fines in contaminant retardation due to plugging of pore constrictions. This plugging phenomenon also depends on various factors such as concentration of colloidal fines, superficial velocity and bead-to-particle size ratio. This plugging-based contaminant transport can be used to develop containment technique in soil and groundwater remediation. (ii) It also presents the importance of critical salt concentration (CSC), critical ionic strength for mixed salt, critical shear stressor critical particle concentration (CPC) on in situ colloidal fines release and migration and consequently their role on contaminant transport in <span class="hlt">porous</span> media. (iii) It also reviews another class of colloidal fines called biocolloids and their transport in <span class="hlt">porous</span> media. Finally, the authors highlight the future research based on their critical review on colloid-associated contaminant transport in saturated <span class="hlt">porous</span> media.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20110011349','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20110011349"><span id="translatedtitle">Ballistic Performance of <span class="hlt">Porous</span>-Ceramic, Thermal Protection Systems</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Miller, J. E.; Bohl, W. E.; Christiansen, Eric C.; Davis, B. A.; Foreman, C. D.</p> <p>2011-01-01</p> <p><span class="hlt">Porous</span>-ceramic, thermal protection systems are used heavily in current reentry vehicles like the Orbiter, and they are currently being proposed for the next generation of US manned spacecraft, Orion. These systems insulate reentry critical components of a spacecraft against the intense thermal environments of atmospheric reentry. Additionally, these materials are highly exposed to space environment hazards like solid particle <span class="hlt">impacts</span>. This paper discusses <span class="hlt">impact</span> studies up to 10 km/s on 8 lb/cu ft alumina-fiber-enhanced-thermal-barrier (AETB8) tiles coated with a toughened-unipiece-fibrous-insulation/ reaction-cured-glass layer (TUFI/RCG). A semi-empirical, first principals <span class="hlt">impact</span> model that describes projectile dispersion is described that provides excellent agreement with observations over a broad range of <span class="hlt">impact</span> velocities, obliquities and projectile materials. Model extensions to look at the implications of greater than 10 GPa equation of state is also discussed. Predicted penetration probabilities for a vehicle visiting the International Space Station is 60% lower for orbital debris and 95% lower for meteoroids with this model compared to an energy scaled approach.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011APS..SHK.Q6001M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011APS..SHK.Q6001M"><span id="translatedtitle">Ballistic Performance of <span class="hlt">Porous</span>-Ceramic, Thermal Protection Systems</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Miller, Joshua; Bohl, William; Christiansen, Eric; Davis, B. Alan; Foreman, Cory</p> <p>2011-06-01</p> <p><span class="hlt">Porous</span>-ceramic, thermal protection systems are used heavily in current reentry vehicles like the Orbiter, and they are currently being proposed for the next generation of US manned spacecraft, Orion. These systems insulate reentry critical components of a spacecraft against the intense thermal environments of atmospheric reentry. Additionally, these materials are also highly exposed to space environment hazards like solid particle <span class="hlt">impacts</span>. This paper discusses <span class="hlt">impact</span> testing up to 9.65 km/s on one of these systems. The materials considered are 8 lb/ft3 alumina-fiber-enhanced-thermal-barrier (AETB8) tiles coated with a toughened-unipiece-fibrous-insulation/reaction-cured-glass layer (TUFI/RCG). A semi-empirical, first principals <span class="hlt">impact</span> model that describes projectile dispersion is described that provides excellent agreement with observations over a broad range of <span class="hlt">impact</span> velocities, obliquities and projectile materials. A model extension to look at the implications of greater than 10 GPa equation of state measurements is also discussed. Predicted penetration probabilities for a vehicle visiting the International Space Station is 60% lower for orbital debris and 95% lower for meteoroids with this model compared to an energy scaled approach.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012AIPC.1426...84M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012AIPC.1426...84M"><span id="translatedtitle">Ballistic performance of <span class="hlt">porous</span>-ceramic, thermal protection systems</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Miller, Joshua E.; Bohl, William E.; Christiansen, Eric C.; Davis, Bruce A.; Foreman, Cory D.</p> <p>2012-03-01</p> <p><span class="hlt">Porous</span>-ceramic, thermal protection systems are used heavily in current reentry vehicles like the Orbiter, and they are currently being proposed for the next generation of US manned spacecraft, Orion. These systems insulate reentry critical components of a spacecraft against the intense thermal environments of atmospheric reentry. Additionally, these materials are highly exposed to space environment hazards like solid particle <span class="hlt">impacts</span>. This paper discusses <span class="hlt">impact</span> studies up to 10 km/s on 8 lb/ft3 alumina-fiber-enhanced-thermal-barrier (AETB8) tiles coated with a toughened-unipiece-fibrousinsulation/ reaction-cured-glass layer (TUFI/RCG). A semi-empirical, first principles <span class="hlt">impact</span> model that describes projectile dispersion is described that provides excellent agreement with observations over a broad range of <span class="hlt">impact</span> velocities, obliquities and projectile materials. Model extensions to look at the implications of greater than 10 GPa equation of state is also discussed. Predicted penetration probabilities for a vehicle visiting the International Space Station is 60% lower for orbital debris and 95% lower for meteoroids with this model compared to an energy scaled approach.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/929726','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/929726"><span id="translatedtitle"><span class="hlt">Porous</span> ceramic scaffolds with complex architectures</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Saiz, Eduardo; Munch, Etienne; Franco, Jaime; Deville, Sylvain; Hunger, Phillip; Saiz, Eduardo; Tomsia, Antoni P.</p> <p>2008-03-15</p> <p>This work compares two novel techniques for the fabrication of ceramic scaffolds for bone tissue engineering with complex porosity: robocasting and freeze casting. Both techniques are based on the preparation of concentrated ceramic suspensions with suitable properties for the process. In robocasting, the computer-guided deposition of the suspensions is used to build <span class="hlt">porous</span> materials with designed three dimensional (3-D) geometries and microstructures. Freeze casting uses ice crystals as a template to form <span class="hlt">porous</span> lamellar ceramic materials. Preliminary results on the compressive strengths of the materials are also reported.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1034299','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1034299"><span id="translatedtitle"><span class="hlt">Porous</span> polymeric materials for hydrogen storage</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Yu, Luping; Liu, Di-Jia; Yuan, Shengwen; Yang, Junbing</p> <p>2011-12-13</p> <p><span class="hlt">Porous</span> polymers, tribenzohexazatriphenylene, poly-9,9'-spirobifluorene, poly-tetraphenyl methane and their derivatives for storage of H.sub.2 prepared through a chemical synthesis method. The <span class="hlt">porous</span> polymers have high specific surface area and narrow pore size distribution. Hydrogen uptake measurements conducted for these polymers determined a higher hydrogen storage capacity at the ambient temperature over that of the benchmark materials. The method of preparing such polymers, includes oxidatively activating solids by CO.sub.2/steam oxidation and supercritical water treatment.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://ntrs.nasa.gov/search.jsp?R=19940000664&hterms=stains&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D70%26Ntt%3Dstains','NASA-TRS'); return false;" href="http://ntrs.nasa.gov/search.jsp?R=19940000664&hterms=stains&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D70%26Ntt%3Dstains"><span id="translatedtitle">Making <span class="hlt">Porous</span> Luminescent Regions In Silicon Wafers</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Fathauer, Robert W.; Jones, Eric W.</p> <p>1994-01-01</p> <p>Regions damaged by ion implantation stain-etched. <span class="hlt">Porous</span> regions within single-crystal silicon wafers fabricated by straightforward stain-etching process. Regions exhibit visible photoluminescence at room temperature and might constitute basis of novel class of optoelectronic devices. Stain-etching process has advantages over recently investigated anodic-etching process. Process works on both n-doped and p-doped silicon wafers. Related development reported in article, "<span class="hlt">Porous</span> Si(x)Ge(1-x) Layers Within Single Crystals of Si," (NPO-18836).</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/20798314','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/20798314"><span id="translatedtitle">An adaptable peptide-based <span class="hlt">porous</span> material.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Rabone, J; Yue, Y-F; Chong, S Y; Stylianou, K C; Bacsa, J; Bradshaw, D; Darling, G R; Berry, N G; Khimyak, Y Z; Ganin, A Y; Wiper, P; Claridge, J B; Rosseinsky, M J</p> <p>2010-08-27</p> <p><span class="hlt">Porous</span> materials find widespread application in storage, separation, and catalytic technologies. We report a crystalline <span class="hlt">porous</span> solid with adaptable porosity, in which a simple dipeptide linker is arranged in a regular array by coordination to metal centers. Experiments reinforced by molecular dynamics simulations showed that low-energy torsions and displacements of the peptides enabled the available pore volume to evolve smoothly from zero as the guest loading increased. The observed cooperative feedback in sorption isotherms resembled the response of proteins undergoing conformational selection, suggesting an energy landscape similar to that required for protein folding. The flexible peptide linker was shown to play the pivotal role in changing the pore conformation.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016AIPC.1738U0139S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016AIPC.1738U0139S"><span id="translatedtitle">Mixed convection opposing flow in <span class="hlt">porous</span> annulus</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Salman, Ahmed N. J.; Kamangar, Sarfaraz; Al-Rashed, Abdullah A. A. A.; Khan, T. M. Yunus; Khaleed, H. M. T.</p> <p>2016-06-01</p> <p>The current work investigates the mixed convection flow in a vertical <span class="hlt">porous</span> annulus embedded with fluid saturated <span class="hlt">porous</span> medium. The annulus is isothermally heated discretely at 20%, 35% and 50% of the height of cylinder at the center of annulus. Darcy law with thermal non-equilibrium approach is considered. The governing partial differential equations are solved using Finite Element Method (FEM). The effects of Peclet number Pe and conductivity ratio Kr on heat transfer and fluid flow is discussed It is found that the applied velocity in the downward direction, in case of an opposing flow, does not allow the thermal energy to reach from a hot to a cold surface.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/1230132','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/1230132"><span id="translatedtitle">Nonisothermal Two-Phase <span class="hlt">Porous</span> Flow</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p></p> <p>1992-02-21</p> <p>NORIA is a finite element program that simultaneously solves four nonlinear parabolic, partial differential equations that describe the transport of water, water vapor, air, and energy through partially saturated <span class="hlt">porous</span> media. NORIA is designed for the analysis of two-dimensional, non-isothermal, unsaturated <span class="hlt">porous</span> flow problems. Nearly all material properties, such as permeability, can either be set to constant values or defined as functions of the dependent and independent variables by user-supplied subroutines. The gas phase is taken to be ideal. NORIA is intended to solve nonisothermal problems in which large gradients are expected in the gas pressure.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015JMMM..396..237M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015JMMM..396..237M"><span id="translatedtitle">Novel hybrid multifunctional magnetoelectric <span class="hlt">porous</span> composite films</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Martins, P.; Gonçalves, R.; Lopes, A. C.; Venkata Ramana, E.; Mendiratta, S. K.; Lanceros-Mendez, S.</p> <p>2015-12-01</p> <p>Novel multifunctional <span class="hlt">porous</span> films have been developed by the integration of magnetic CoFe2O4 (CFO) nanoparticles into poly(vinylidene fluoride)-Trifuoroethylene (P(VDF-TrFE)), taking advantage of the synergies of the magnetostrictive filler and the piezoelectric polymer. The <span class="hlt">porous</span> films show a piezoelectric response with an effective d33 coefficient of -22 pC/N-1, a maximum magnetization of 12 emu g-1 and a maximum magnetoelectric coefficient of 9 mV cm-1 Oe-1. In this way, a multifunctional membrane has been developed suitable for advanced applications ranging from biomedical to water treatment.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/1230132-nonisothermal-two-phase-porous-flow','SCIGOV-ESTSC'); return false;" href="http://www.osti.gov/scitech/biblio/1230132-nonisothermal-two-phase-porous-flow"><span id="translatedtitle">Nonisothermal Two-Phase <span class="hlt">Porous</span> Flow</span></a></p> <p><a target="_blank" href=""></a></p> <p></p> <p>1992-02-21</p> <p>NORIA is a finite element program that simultaneously solves four nonlinear parabolic, partial differential equations that describe the transport of water, water vapor, air, and energy through partially saturated <span class="hlt">porous</span> media. NORIA is designed for the analysis of two-dimensional, non-isothermal, unsaturated <span class="hlt">porous</span> flow problems. Nearly all material properties, such as permeability, can either be set to constant values or defined as functions of the dependent and independent variables by user-supplied subroutines. The gas phase ismore » taken to be ideal. NORIA is intended to solve nonisothermal problems in which large gradients are expected in the gas pressure.« less</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li class="active"><span>24</span></li> <li><a href="#" onclick='return showDiv("page_25");'>25</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_24 --> <div id="page_25" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li class="active"><span>25</span></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="481"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://ntrs.nasa.gov/search.jsp?R=19850000111&hterms=perforation+mine+back&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D90%26Ntt%3Dperforation%2Bmine%2Bback','NASA-TRS'); return false;" href="http://ntrs.nasa.gov/search.jsp?R=19850000111&hterms=perforation+mine+back&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D90%26Ntt%3Dperforation%2Bmine%2Bback"><span id="translatedtitle">Quasi-<span class="hlt">Porous</span> Plug With Vortex Chamber</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Walsh, J. V.</p> <p>1985-01-01</p> <p>Pressure-letdown valve combines quasi-<span class="hlt">porous</span>-plug and vortex-chamber in one controllable unit. Valve useful in fossil-energy plants for reducing pressures in such erosive two-phase process streams as steam/water, coal slurries, or combustion gases with entrained particles. Quasi-<span class="hlt">Porous</span> Plug consists of plenums separated by perforated plates. Number or size of perforations increases with each succeeding stage to compensate for expansion. In Vortex Chamber, control flow varies to control swirl and therefore difference between inlet and outlet pressures.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://ntrs.nasa.gov/search.jsp?R=19900000024&hterms=porous+material&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D40%26Ntt%3Dporous%2Bmaterial','NASA-TRS'); return false;" href="http://ntrs.nasa.gov/search.jsp?R=19900000024&hterms=porous+material&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D40%26Ntt%3Dporous%2Bmaterial"><span id="translatedtitle">Predicting Pressure Drop In <span class="hlt">Porous</span> Materials</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Lawing, Pierce L.</p> <p>1990-01-01</p> <p>Theory developed to predict drop in pressure based on drag of individual fibers. Simple correlation method for data also developed. Helps in predicting flow characteristics of many strain-isolation pad (SIP) glow geometries in Shuttle Orbiter tile system. Also helps in predicting venting characteristics of tile assemblies during ascent and leakage of hot gas under tiles during descent. Useful in study of mechanics of flows through fibrous and <span class="hlt">porous</span> media, and procedures applicable to purged fiberglass insulation, dialysis filters, and other fibrous and <span class="hlt">porous</span> media.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2006AIPC..845...37B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2006AIPC..845...37B"><span id="translatedtitle">Dynamic Compaction Modeling of <span class="hlt">Porous</span> Silica Powder</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Borg, John P.; Schwalbe, Larry; Cogar, John; Chapman, D. J.; Tsembelis, K.; Ward, Aaron; Lloyd, Andrew</p> <p>2006-07-01</p> <p>A computational analysis of the dynamic compaction of <span class="hlt">porous</span> silica is presented and compared with experimental measurements. The experiments were conducted at Cambridge University's one-dimensional flyer plate facility. The experiments shock loaded samples of silica dust of various initial <span class="hlt">porous</span> densities up to a pressure of 2.25 GPa. The computational simulations utilized a linear Us-Up Hugoniot. The compaction events were modeled with CTH, a 3D Eulerian hydrocode developed at Sandia National Laboratory. Simulated pressures at two test locations are presented and compared with measurements.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/10120802','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/10120802"><span id="translatedtitle">Transport of subsurface bacteria in <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Bales, R.C.; Arnold, R.G.; Gerba, C.P.</p> <p>1995-02-01</p> <p>The primary objective of this study was to develop tools with which to measure the advective transport of microorganisms through <span class="hlt">porous</span> media. These tools were then applied to investigate the sorptive properties of representative microorganisms that were selected at random from the DOE`s deep subsurface collection of bacterial, maintained at Florida State University. The transport screening procedure that arose from this study was also used to investigate biological factors that affect the transport/sorption of biocolloids during their movement through <span class="hlt">porous</span> media with the bulk advective flow.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/27322176','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/27322176"><span id="translatedtitle">General Preparation of Three-Dimensional <span class="hlt">Porous</span> Metal Oxide Foams Coated with Nitrogen-Doped Carbon for Enhanced Lithium Storage.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lu, Ke; Xu, Jiantie; Zhang, Jintao; Song, Bin; Ma, Houyi</p> <p>2016-07-13</p> <p><span class="hlt">Porous</span> metal oxide architectures coated with a thin layer of carbon are attractive materials for energy storage applications. Here, a series of <span class="hlt">porous</span> metal oxide (e.g., vanadium oxides, molybdenum oxides, manganese oxides) foams with/without nitrogen-doped carbon (N-C) coating have been synthesized via a general surfactant-assisted template method, <span class="hlt">involving</span> the formation of <span class="hlt">porous</span> metal oxides coated with 1-hexadecylamine (HDA) and a subsequent thermal treatment. The presence of HDA is of importance for the formation of a <span class="hlt">porous</span> structure, and the successive pyrolysis of such a nitrogen-containing surfactant generates nitrogen-doped carbon (N-C) coated on the surface of metal oxides, which also provides a facile way to adjust the valence states of metal oxides via the carbothermal reduction reaction. When used as electrode materials, the highly <span class="hlt">porous</span> metal oxides with N-C coating exhibited enhanced performance for lithium ion storage, thanks to the unique 3D structures associated with highly <span class="hlt">porous</span> structure and thin N-C coating. Typically, the <span class="hlt">porous</span> metal oxides (V2O5, MoO3, MnO2) exhibited discharge capacities of 286, 303, and 463 mAh g(-1) at current densities of 30 and 100 mA g(-1), respectively. In contrast, the metal oxides with low valences and carbon coating (VO2@N-C, MoO2@N-C, and MnO@N-C) exhibited improved capacities of 461, 613, and 892 mAh g(-1). The capacity retentions of about 87.5, 80.2, and 85.0% for VO2@N-C, MoO2@N-C, and MnO@N-C were achieved after 600 cycles, suggesting the acceptable cycling stability. The present strategy would provide general guidance for preparing <span class="hlt">porous</span> metal oxide foams with enhanced lithium storage performances. PMID:27322176</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27322176','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27322176"><span id="translatedtitle">General Preparation of Three-Dimensional <span class="hlt">Porous</span> Metal Oxide Foams Coated with Nitrogen-Doped Carbon for Enhanced Lithium Storage.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lu, Ke; Xu, Jiantie; Zhang, Jintao; Song, Bin; Ma, Houyi</p> <p>2016-07-13</p> <p><span class="hlt">Porous</span> metal oxide architectures coated with a thin layer of carbon are attractive materials for energy storage applications. Here, a series of <span class="hlt">porous</span> metal oxide (e.g., vanadium oxides, molybdenum oxides, manganese oxides) foams with/without nitrogen-doped carbon (N-C) coating have been synthesized via a general surfactant-assisted template method, <span class="hlt">involving</span> the formation of <span class="hlt">porous</span> metal oxides coated with 1-hexadecylamine (HDA) and a subsequent thermal treatment. The presence of HDA is of importance for the formation of a <span class="hlt">porous</span> structure, and the successive pyrolysis of such a nitrogen-containing surfactant generates nitrogen-doped carbon (N-C) coated on the surface of metal oxides, which also provides a facile way to adjust the valence states of metal oxides via the carbothermal reduction reaction. When used as electrode materials, the highly <span class="hlt">porous</span> metal oxides with N-C coating exhibited enhanced performance for lithium ion storage, thanks to the unique 3D structures associated with highly <span class="hlt">porous</span> structure and thin N-C coating. Typically, the <span class="hlt">porous</span> metal oxides (V2O5, MoO3, MnO2) exhibited discharge capacities of 286, 303, and 463 mAh g(-1) at current densities of 30 and 100 mA g(-1), respectively. In contrast, the metal oxides with low valences and carbon coating (VO2@N-C, MoO2@N-C, and MnO@N-C) exhibited improved capacities of 461, 613, and 892 mAh g(-1). The capacity retentions of about 87.5, 80.2, and 85.0% for VO2@N-C, MoO2@N-C, and MnO@N-C were achieved after 600 cycles, suggesting the acceptable cycling stability. The present strategy would provide general guidance for preparing <span class="hlt">porous</span> metal oxide foams with enhanced lithium storage performances.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20090027707','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20090027707"><span id="translatedtitle">Ballistic Performance of <span class="hlt">Porous</span> Ceramic Thermal Protection Systems at 9 km/s</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Miller, Joshua E.; Bohl, W. E.; Foreman, C. D.; Christiansen, Eric L.; Davis, B. A.</p> <p>2009-01-01</p> <p><span class="hlt">Porous</span>-ceramic, thermal-protection-systems are used heavily in current reentry vehicles like the Orbiter, and they are currently being proposed for the next generation of manned spacecraft, Orion. These materials insulate the structural components and sensitive electronic components of a spacecraft against the intense thermal environments of atmospheric reentry. Furthermore, these materials are also highly exposed to space environmental hazards like meteoroid and orbital debris <span class="hlt">impacts</span>. This paper discusses recent <span class="hlt">impact</span> testing up to 9 km/s on ceramic tiles similar to those used on the Orbiter. These tiles have a <span class="hlt">porous</span>-batting of nominally 8 lb/cubic ft alumina-fiber-enhanced-thermal-barrier (AETB8) insulating material coated with a damage-resistant, toughened-unipiece-fibrous-insulation (TUFI) layer.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2012-title40-vol32/pdf/CFR-2012-title40-vol32-sec761-267.pdf','CFR2012'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2012-title40-vol32/pdf/CFR-2012-title40-vol32-sec761-267.pdf"><span id="translatedtitle">40 CFR 761.267 - Sampling non-<span class="hlt">porous</span> surfaces.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2012&page.go=Go">Code of Federal Regulations, 2012 CFR</a></p> <p></p> <p>2012-07-01</p> <p>... 40 Protection of Environment 32 2012-07-01 2012-07-01 false Sampling non-<span class="hlt">porous</span> surfaces. 761.267... PROHIBITIONS Cleanup Site Characterization Sampling for PCB Remediation Waste in Accordance with § 761.61(a)(2) § 761.267 Sampling non-<span class="hlt">porous</span> surfaces. (a) Sample large, nearly flat, non-<span class="hlt">porous</span> surfaces by...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2014-title40-vol31/pdf/CFR-2014-title40-vol31-sec761-267.pdf','CFR2014'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2014-title40-vol31/pdf/CFR-2014-title40-vol31-sec761-267.pdf"><span id="translatedtitle">40 CFR 761.267 - Sampling non-<span class="hlt">porous</span> surfaces.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2014&page.go=Go">Code of Federal Regulations, 2014 CFR</a></p> <p></p> <p>2014-07-01</p> <p>... 40 Protection of Environment 31 2014-07-01 2014-07-01 false Sampling non-<span class="hlt">porous</span> surfaces. 761.267... PROHIBITIONS Cleanup Site Characterization Sampling for PCB Remediation Waste in Accordance with § 761.61(a)(2) § 761.267 Sampling non-<span class="hlt">porous</span> surfaces. (a) Sample large, nearly flat, non-<span class="hlt">porous</span> surfaces by...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2013-title40-vol32/pdf/CFR-2013-title40-vol32-sec761-267.pdf','CFR2013'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2013-title40-vol32/pdf/CFR-2013-title40-vol32-sec761-267.pdf"><span id="translatedtitle">40 CFR 761.267 - Sampling non-<span class="hlt">porous</span> surfaces.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2013&page.go=Go">Code of Federal Regulations, 2013 CFR</a></p> <p></p> <p>2013-07-01</p> <p>... 40 Protection of Environment 32 2013-07-01 2013-07-01 false Sampling non-<span class="hlt">porous</span> surfaces. 761.267... PROHIBITIONS Cleanup Site Characterization Sampling for PCB Remediation Waste in Accordance with § 761.61(a)(2) § 761.267 Sampling non-<span class="hlt">porous</span> surfaces. (a) Sample large, nearly flat, non-<span class="hlt">porous</span> surfaces by...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2011-title40-vol31/pdf/CFR-2011-title40-vol31-sec761-267.pdf','CFR2011'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2011-title40-vol31/pdf/CFR-2011-title40-vol31-sec761-267.pdf"><span id="translatedtitle">40 CFR 761.267 - Sampling non-<span class="hlt">porous</span> surfaces.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2011&page.go=Go">Code of Federal Regulations, 2011 CFR</a></p> <p></p> <p>2011-07-01</p> <p>... 40 Protection of Environment 31 2011-07-01 2011-07-01 false Sampling non-<span class="hlt">porous</span> surfaces. 761.267... PROHIBITIONS Cleanup Site Characterization Sampling for PCB Remediation Waste in Accordance with § 761.61(a)(2) § 761.267 Sampling non-<span class="hlt">porous</span> surfaces. (a) Sample large, nearly flat, non-<span class="hlt">porous</span> surfaces by...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1129389','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1129389"><span id="translatedtitle">Microfluidic devices and methods including <span class="hlt">porous</span> polymer monoliths</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Hatch, Anson V; Sommer, Gregory J; Singh, Anup K; Wang, Ying-Chih; Abhyankar, Vinay V</p> <p>2014-04-22</p> <p>Microfluidic devices and methods including <span class="hlt">porous</span> polymer monoliths are described. Polymerization techniques may be used to generate <span class="hlt">porous</span> polymer monoliths having pores defined by a liquid component of a fluid mixture. The fluid mixture may contain iniferters and the resulting <span class="hlt">porous</span> polymer monolith may include surfaces terminated with iniferter species. Capture molecules may then be grafted to the monolith pores.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/21180168','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/21180168"><span id="translatedtitle">Anomalous Diffusion Mediated by Atom Deposition into a <span class="hlt">Porous</span> Substrate</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Brault, Pascal; Bauchire, Jean-Marc; Josserand, Christophe; Caillard, Amaeel; Charles, Christine; Boswell, Rod W.</p> <p>2009-01-30</p> <p>Constant flux atom deposition into a <span class="hlt">porous</span> medium is shown to generate a dense overlayer and a diffusion profile. Scaling analysis shows that the overlayer acts as a dynamic control for atomic diffusion in the <span class="hlt">porous</span> substrate. This is modeled by generalizing the <span class="hlt">porous</span> diffusion equation with a time-dependent diffusion coefficient equivalent to a nonlinear rescaling of time.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1227358','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1227358"><span id="translatedtitle">Microfluidic devices and methods including <span class="hlt">porous</span> polymer monoliths</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Hatch, Anson V.; Sommer, Gregory j.; Singh, Anup K.; Wang, Ying-Chih; Abhyankar, Vinay</p> <p>2015-12-01</p> <p>Microfluidic devices and methods including <span class="hlt">porous</span> polymer monoliths are described. Polymerization techniques may be used to generate <span class="hlt">porous</span> polymer monoliths having pores defined by a liquid component of a fluid mixture. The fluid mixture may contain iniferters and the resulting <span class="hlt">porous</span> polymer monolith may include surfaces terminated with iniferter species. Capture molecules may then be grafted to the monolith pores.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/21090883','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/21090883"><span id="translatedtitle">Form birefringence in <span class="hlt">porous</span> semiconductors and dielectrics: A review</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Golovan', L. A. Kashkarov, P. K.; Timoshenko, V. Yu.</p> <p>2007-07-15</p> <p>The phenomenon of optical anisotropy in <span class="hlt">porous</span> semiconductors and dielectrics (<span class="hlt">porous</span> silicon, gallium phosphide, and alumina) and photonic crystal structures formed on their basis is reviewed. It is shown that anisotropic nanostructuring of initially isotropic media leads to the occurrence of strong birefringence. Applicability of the effective-medium model to description of the form birefringence in <span class="hlt">porous</span> semiconductors and dielectrics is discussed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2010-title40-vol30/pdf/CFR-2010-title40-vol30-sec761-267.pdf','CFR'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2010-title40-vol30/pdf/CFR-2010-title40-vol30-sec761-267.pdf"><span id="translatedtitle">40 CFR 761.267 - Sampling non-<span class="hlt">porous</span> surfaces.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2010&page.go=Go">Code of Federal Regulations, 2010 CFR</a></p> <p></p> <p>2010-07-01</p> <p>... 40 Protection of Environment 30 2010-07-01 2010-07-01 false Sampling non-<span class="hlt">porous</span> surfaces. 761.267...) § 761.267 Sampling non-<span class="hlt">porous</span> surfaces. (a) Sample large, nearly flat, non-<span class="hlt">porous</span> surfaces by dividing the surface into roughly square portions approximately 2 meters on each side. Follow the procedures...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015EGUGA..17.3560D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015EGUGA..17.3560D"><span id="translatedtitle">Vorticity and upscaled dispersion in 3D heterogeneous <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Di Dato, Mariaines; Chiogna, Gabriele; de Barros, Felipe; Bellin, Alberto; Fiori, Aldo</p> <p>2015-04-01</p> <p>Modeling flow in <span class="hlt">porous</span> media is relevant for many environmental, energy and industrial applications. From an environmental perspective, the relevance of <span class="hlt">porous</span> media flow becomes evident in subsurface hydrology. In general, flow in natural <span class="hlt">porous</span> media is creeping, yet the large variability in the hydraulic conductivity values encountered in natural aquifers leads to highly heterogeneous flow fields. This natural variability in the conductivity field will affect both dilution rates of chemical species and reactive mixing. A physical consequence of this heterogeneity is also the presence of a various localized kinematical features such as straining, shearing and vorticity in aquifers, which will influence the shape of solute clouds and its fate and transport. This work aims in fundamentally characterizing the vorticity field in spatially heterogeneous flow fields as a function of their statistical properties in order to analyze the <span class="hlt">impact</span> on transport processes. In our study, three-dimensional <span class="hlt">porous</span> formations are constructed with an ensemble of N independent, non-overlapping spheroidal inclusions submerged into an homogeneous matrix, of conductivity K0. The inclusions are randomly located in a domain of volume W and are fully characterized by the geometry of spheroid (oblate or prolate), their conductivity K (random and drawn from a given probability density function fκ), the centroid location ¯x, the axes ratio e, the orientation of the rotational axis (α1,α2) and the volume w. Under the assumption of diluted medium, the flow problem is solved analitically by means of only two parameters: the conductivity contrast κ = K/K0 and the volume fraction n = Nw/W . Through the variation of these parameters of the problem, it is possible to approximate the structure of natural heterogeneous <span class="hlt">porous</span> media. Using a random distribution of the orientation of the inclusions, we create media defined by the same global anisotropy f = Iz/Ix but different micro</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004PhDT.......220C&link_type=ABSTRACT','NASAADS'); return false;" href="http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004PhDT.......220C&link_type=ABSTRACT"><span id="translatedtitle">Characterization of <span class="hlt">porous</span> media and refractory materials</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Chen, Xin</p> <p></p> <p>Because of its unique advantages on energy savings and casting complex shapes, Lost Foam Casting (LFC) has been widely used as a replacement to the conventional techniques (sand and investment castings). In order to continuously improve the quality of the Lost Foam Casting process for reducing scrap rate and increasing energy savings, the US Department of Energy sponsored the present study to develop new characterization techniques for enhancing the understanding of the fundamental properties of the refractory materials used in the Lost Foam Casting process. In this study, new techniques are proposed to characterize the refractory materials' properties such as particle size, particle shape, rheological behavior, transport properties, microstructure, thickness, as well as packing properties. The microstructure information obtained from the proposed technique is found to be well correlated with the transport properties of the <span class="hlt">porous</span> coating materials. A procedure using a three-dimensional computational fluid dynamics code is developed to simulate experimental gas flow data for solving complex boundary value problems. In this study, the effects of dilution and dispersion on the coating properties such as transport properties and microstructures are also investigated. Results show that the dilution and dispersion have opposing influences on the pore size and transport properties. In addition, this study also includes another part of the permeability system, the un-bonded granular materials used in the Lost Foam Casting process. A three-dimensional (3-D) computer program is developed to simulate the packing behavior of granular materials at a loose state using a "drop and roll" method. This study provides a systematic characterization of the LFC refractory coating slurries, dried refractory coating, and the granular media. This study also demonstrates the application of proposed characterization techniques for coating quality control using statistical process control</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016CPM.....3..429G','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016CPM.....3..429G"><span id="translatedtitle">Instationary compaction wave propagation in highly <span class="hlt">porous</span> cohesive granular media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Gunkelmann, Nina; Ringl, Christian; Urbassek, Herbert M.</p> <p>2016-07-01</p> <p>We study the collision of a highly <span class="hlt">porous</span> granular aggregate of adhesive \\upmu m-sized silica grains with a hard wall using a granular discrete element method. A compaction wave runs through the granular sample building up an inhomogeneous density profile. The compaction is independent of the length of the aggregate, within the regime of lengths studied here. Also short pulses, as they might be exerted by a piston pushing the granular material, excite a compaction wave that runs through the entire material. The speed of the compaction wave is larger than the <span class="hlt">impact</span> velocity but considerably smaller than the sound speed. The wave speed is related to the compaction rate at the colliding surface and the average slope of the linear density profile.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2013PhRvE..87c2144W&link_type=ABSTRACT','NASAADS'); return false;" href="http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2013PhRvE..87c2144W&link_type=ABSTRACT"><span id="translatedtitle">Anomalous transport in weakly heterogeneous geological <span class="hlt">porous</span> media</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Wang, Yan</p> <p>2013-03-01</p> <p>Anomalous transport is found to be ubiquitous in complex geological formations and it has a paramount <span class="hlt">impact</span> on petroleum engineering and groundwater sciences. This process can be well described by the continuous time random walk (CTRW) model, in which the probability density function w(t) of a particle's transition time t follows a power law for large t: w(t)˜t-1-α (0<α<2). In this work, based on the CTRW theory, a semifractional advection-diffusion equation is proposed to model the anomalous transport for 1<α<2, which is, as evidenced by field and numerical experiments, possibly the typical situation for many complex geological <span class="hlt">porous</span> media with weakly heterogeneous microstructures.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li class="active"><span>25</span></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_25 --> <center> <div class="footer-extlink text-muted"><small>Some links on this page may take you to non-federal websites. 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