Science.gov

Sample records for media processes mediaphysics

  1. Statistical physics of media processes: Mediaphysics

    NASA Astrophysics Data System (ADS)

    Kuznetsov, Dmitri V.; Mandel, Igor

    2007-04-01

    The processes of mass communications in complicated social or sociobiological systems such as marketing, economics, politics, animal populations, etc. as a subject for the special scientific subbranch-“mediaphysics”-are considered in its relation with sociophysics. A new statistical physics approach to analyze these phenomena is proposed. A keystone of the approach is an analysis of population distribution between two or many alternatives: brands, political affiliations, or opinions. Relative distances between a state of a “person's mind” and the alternatives are measures of propensity to buy (to affiliate, or to have a certain opinion). The distribution of population by those relative distances is time dependent and affected by external (economic, social, marketing, natural) and internal (influential propagation of opinions, “word of mouth”, etc.) factors, considered as fields. Specifically, the interaction and opinion-influence field can be generalized to incorporate important elements of Ising-spin-based sociophysical models and kinetic-equation ones. The distributions were described by a Schrödinger-type equation in terms of Green's functions. The developed approach has been applied to a real mass-media efficiency problem for a large company and generally demonstrated very good results despite low initial correlations of factors and the target variable.

  2. Memory Processes in Media Effects.

    ERIC Educational Resources Information Center

    Kellermann, Kathy

    1985-01-01

    Explores the role of memory in mediating mass communication effects. Examines (1) the nature of memory, (2) issues in retention and recall of media messages, (3) methods of promoting retention and recall of media messages, and (4) implications of memory processes for mass media effects. (PD)

  3. Composite media for ion processing

    DOEpatents

    Mann, Nick R.; Wood, Donald J.; Todd, Terry A.; Sebesta, Ferdinand

    2009-12-08

    Composite media, systems, and devices for substantially removing, or otherwise processing, one or more constituents of a fluid stream. The composite media comprise a plurality of beads, each having a matrix substantially comprising polyacrylonitrile (PAN) and supporting one or more active components which are effective in removing, by various mechanisms, one or more constituents from a fluid stream. Due to the porosity and large surface area of the beads, a high level of contact is achieved between composite media of the present invention and the fluid stream being processed. Further, the homogeneity of the beads facilitates use of the beads in high volume applications where it is desired to effectively process a large volume of flow per unit of time.

  4. Tribochemical processes in organic media

    SciTech Connect

    Chigarenko, G.G.; Barchan, G.P.; Ponomarenko, A.G.

    1982-11-01

    Investigates the influence of the chemical structure of a number of organic compounds of different classes on their lubricating properties and the processes in the friction zone. Uses monohydric, dihydric, and trihydric alcohols, aldehydes, alkylcarboxylic acids, dialkyl ethers, esters of monocarboxylic and dicarboxylic acids, and esters of hydroxy-acids as the lubricating medium. Finds that when friction takes place in a medium consisting of an organic compound that is less active than acids or aldehydes, an equilibrium optimal quantity of acid is formed by tribochemical means, and this tends to give a substantial reduction of the coefficient of friction and wear. Concludes that the formation of carboxyl-containing organic compounds is one of the tribochemical processes that are necessary to improve lubricity.

  5. Ion processing element with composite media

    DOEpatents

    Mann, Nick R.; Tranter, Troy J.; Todd, Terry A.; Sebesta, Ferdinand

    2009-03-24

    An ion processing element employing composite media disposed in a porous substrate, for facilitating removal of selected chemical species from a fluid stream. The ion processing element includes a porous fibrous glass substrate impregnated by composite media having one or more active components supported by a matrix material of polyacrylonitrile. The active components are effective in removing, by various mechanisms, one or more constituents from a fluid stream passing through the ion processing element. Due to the porosity and large surface area of both the composite medium and the substrate in which it is disposed, a high degree of contact is achieved between the active component and the fluid stream being processed. Further, the porosity of the matrix material and the substrate facilitates use of the ion processing element in high volume applications where it is desired to effectively process a high volume flows.

  6. Ion processing element with composite media

    DOEpatents

    Mann, Nick R.; Tranter, Troy J.; Todd, Terry A.; Sebesta, Ferdinand

    2003-02-04

    An ion processing element employing composite media disposed in a porous substrate, for facilitating removal of selected chemical species from a fluid stream. The ion processing element includes a porous fibrous glass substrate impregnated by composite media having one or more active components supported by a matrix material of polyacrylonitrile. The active components are effective in removing, by various mechanisms, one or more constituents from a fluid stream passing through the ion processing element. Due to the porosity and large surface area of both the composite medium and the substrate in which it is disposed, a high degree of contact is achieved between the active component and the fluid stream being processed. Further, the porosity of the matrix material and the substrate facilitates use of the ion processing element in high volume applications where it is desired to effectively process a high volume flows.

  7. Coupled transport processes in semipermeable media

    SciTech Connect

    Carnahan, C.L.; Jacobsen, J.S.

    1990-04-01

    The thermodynamics of irreversible processes (TTIP) is used to derive governing equations and phenomenological equations for transport processes and chemical reactions in water-saturated semipermeable media. TTIP is based on three fundamental postulates. The first postulate, the assumption of local equilibrium, allows the formulation of balance equations for entropy. These equations are the bases for the derivation of governing equations for the thermodynamic variables, temperature, pressure, and composition. The governing equations involve vector fluxes of heat and mass and scalar rates of chemical reactions; in accordance with the second postulate of TTIP, these fluxes and rates are related, respectively, to all scalar driving forces (gradients of thermodynamic variables) acting within the system. The third postulate of TTIP states equality (the Onsager reciprocal relations) between certain of the phenomenological coefficients relating forces and fluxes. The description by TTIP of a system undergoing irreversible processes allows consideration of coupled transport processes such as thermal osmosis, chemical osmosis, and ultrafiltration. The coupled processes can make significant contributions to flows of mass and energy in slightly permeable, permselective geological materials such as clays and shales.

  8. Coupled transport processes in semipermeable media

    SciTech Connect

    Jacobsen, J.S.; Carnahan, C.L.

    1990-04-01

    A numerical simulator has been developed to investigate the effects of coupled processes on heat and mass transport in semipermeable media. The governing equations on which the simulator is based were derived using the thermodynamics of irreversible processes. The equations are nonlinear and have been solved numerically using the n-dimensional Newton's method. As an example of an application, the numerical simulator has been used to investigate heat and solute transport in the vicinity of a heat source buried in a saturated clay-like medium, in part to study solute transport in bentonite packing material surrounding a nuclear waste canister. The coupled processes considered were thermal filtration, thermal osmosis, chemical osmosis and ultrafiltration. In the simulations, heat transport by coupled processes was negligible compared to heat conduction, but pressure and solute migration were affected. Solute migration was retarded relative to the uncoupled case when only chemical osmosis was considered. When both chemical osmosis and thermal osmosis were included, solute migration was enhanced. 18 refs., 20 figs.

  9. Modeling microbial processes in porous media

    NASA Astrophysics Data System (ADS)

    Murphy, Ellyn M.; Ginn, Timothy R.

    The incorporation of microbial processes into reactive transport models has generally proceeded along two separate lines of investigation: (1) transport of bacteria as inert colloids in porous media, and (2) the biodegradation of dissolved contaminants by a stationary phase of bacteria. Research over the last decade has indicated that these processes are closely linked. This linkage may occur when a change in metabolic activity alters the attachment/detachment rates of bacteria to surfaces, either promoting or retarding bacterial transport in a groundwater-contaminant plume. Changes in metabolic activity, in turn, are controlled by the time of exposure of the microbes to electron acceptors/donor and other components affecting activity. Similarly, metabolic activity can affect the reversibility of attachment, depending on the residence time of active microbes. Thus, improvements in quantitative analysis of active subsurface biota necessitate direct linkages between substrate availability, metabolic activity, growth, and attachment/detachment rates. This linkage requires both a detailed understanding of the biological processes and robust quantitative representations of these processes that can be tested experimentally. This paper presents an overview of current approaches used to represent physicochemical and biological processes in porous media, along with new conceptual approaches that link metabolic activity with partitioning of the microorganism between the aqueous and solid phases. Résumé L'introduction des processus microbiologiques dans des modèles de transport réactif a généralement suivi deux voies différentes de recherches: (1) le transport de bactéries sous forme de colloïdes inertes en milieu poreux, et (2) la biodégradation de polluants dissous par une phase stationnaire de bactéries. Les recherches conduites au cours des dix dernières années indiquent que ces processus sont intimement liés. Cette liaison peut intervenir lorsqu

  10. Granular media filtration: old process, new thoughts.

    PubMed

    Lawler, D F; Nason, J A

    2006-01-01

    The design of granular media filters has evolved over many years so that modern filters have larger media sizes and higher filtration velocities than in earlier times. The fundamental understanding of filtration has also improved over time, with current models that account reasonably for all characteristics of the media, the suspension and the filter operation. The methodology for design, however, has not kept pace with these improvements; current designs are based on pilot plants, past experience, or a simple guideline (the ratio of the bed depth to media grain size). We propose that design should be based universally on a characteristic removal length, with the provision of a bed depth that is some multiple of that characteristic length. This characteristic removal length is calculated using the most recent (and most complete) fundamental model and is based on the particle size with the minimum removal efficiency in a filter. The multiple of the characteristic length that yields the required bed depth has been calibrated to existing, successful filters.

  11. Dip-moveout processing by Fourier transform in anisotropic media

    SciTech Connect

    Anderson, J.; Tsvankin, I.

    1994-12-01

    Conventional dip-moveout (DMO) processing is designed for isotropic media and cannot handle angle-dependent velocity. The authors show that Hale`s isotropic DMO algorithm remains valid for elliptical anisotropy but may lead to serious errors for non-elliptical transversely isotropic models, even if velocity anisotropy is moderate. Here, they present an extension of Hale`s constant-velocity DMO method to anisotropic media. The DMO operator, to be applied to normal-moveout (NMO) corrected data, is based on the analytic expression for NMO velocity for dipping reflectors given by Tsvankin (1995a). Since the anisotropic DMO depends on the elastic parameters of the medium, it should be preceded by an inversion procedure designed to obtain the NMO velocity as a function of ray parameter. Another complication introduced by anisotropy is the influence of nonhyperbolic moveout not accounted for in the DMO operator. However, for spreads typical in conventional acquisition design, deviations from hyperbolic moveout for P-waves are not significant. Impulse responses and synthetic examples for typical transversely isotropic models with a vertical symmetry axis (VTI) demonstrate the accuracy and efficiency of this DMO technique. Once the inversion step has been completed, the NMO-DMO sequence does not take any more computing time than that for the generic Hale`s method in isotropic media. Their anisotropic DMO operator is not limited to VTI media; it can be applied in the same fashion in symmetry planes of more complicated models such as orthorhombic.

  12. (Central) Auditory Processing: the impact of otitis media

    PubMed Central

    Borges, Leticia Reis; Paschoal, Jorge Rizzato; Colella-Santos, Maria Francisca

    2013-01-01

    OBJECTIVE: To analyze auditory processing test results in children suffering from otitis media in their first five years of age, considering their age. Furthermore, to classify central auditory processing test findings regarding the hearing skills evaluated. METHODS: A total of 109 students between 8 and 12 years old were divided into three groups. The control group consisted of 40 students from public school without a history of otitis media. Experimental group I consisted of 39 students from public schools and experimental group II consisted of 30 students from private schools; students in both groups suffered from secretory otitis media in their first five years of age and underwent surgery for placement of bilateral ventilation tubes. The individuals underwent complete audiological evaluation and assessment by Auditory Processing tests. RESULTS: The left ear showed significantly worse performance when compared to the right ear in the dichotic digits test and pitch pattern sequence test. The students from the experimental groups showed worse performance when compared to the control group in the dichotic digits test and gaps-in-noise. Children from experimental group I had significantly lower results on the dichotic digits and gaps-in-noise tests compared with experimental group II. The hearing skills that were altered were temporal resolution and figure-ground perception. CONCLUSION: Children who suffered from secretory otitis media in their first five years and who underwent surgery for placement of bilateral ventilation tubes showed worse performance in auditory abilities, and children from public schools had worse results on auditory processing tests compared with students from private schools. PMID:23917659

  13. Twitter for Teaching: Can Social Media Be Used to Enhance the Process of Learning?

    ERIC Educational Resources Information Center

    Evans, Chris

    2014-01-01

    Can social media be used to enhance the process of learning by students in higher education? Social media have become widely adopted by students in their personal lives. However, the application of social media to teaching and learning remains to be fully explored. In this study, the use of the social media tool Twitter for teaching was…

  14. Electret processes in disordered systems based on liquid dispersion media

    NASA Astrophysics Data System (ADS)

    Shcherbachenko, L. A.; Maksimova, N. T.; Komarov, E. S.; Ruzhnikov, L. I.; Karnakov, V. A.; Baryshnikov, E. S.; Krasnov, D. A.; Troshev, A. A.; Baryshnikov, D. S.; Ezhova, L. I.

    2012-10-01

    Electret-thermal analysis (ETA) of disordered systems based on dispersed media is carried out. It is shown that the method of thermally stimulated currents makes it possible to estimate the structural changes occurring in a liquid dispersion medium. It is found that liquid water in a free state exhibits the electret properties. The observed multiple peaks on the thermally stimulated current curve are the evidence of the multicomponent nature of the "free water" system. The mechanisms of processes leading to the formation of the electret state in such systems are considered.

  15. Composite media for fluid stream processing, a method of forming the composite media, and a related method of processing a fluid stream

    DOEpatents

    Garn, Troy G; Law, Jack D; Greenhalgh, Mitchell R; Tranter, Rhonda

    2014-04-01

    A composite media including at least one crystalline aluminosilicate material in polyacrylonitrile. A method of forming a composite media is also disclosed. The method comprises dissolving polyacrylonitrile in an organic solvent to form a matrix solution. At least one crystalline aluminosilicate material is combined with the matrix solution to form a composite media solution. The organic solvent present in the composite media solution is diluted. The composite media solution is solidified. In addition, a method of processing a fluid stream is disclosed. The method comprises providing a beads of a composite media comprising at least one crystalline aluminosilicate material dispersed in a polyacrylonitrile matrix. The beads of the composite media are contacted with a fluid stream comprising at least one constituent. The at least one constituent is substantially removed from the fluid stream.

  16. Mechanical Clogging Processes in Unconsolidated Porous Media Near Pumping Wells

    NASA Astrophysics Data System (ADS)

    de Zwart, B.; Schotting, R.; Hassanizadeh, M.

    2003-12-01

    In the Netherlands water supply companies produce over more than one billion cubic meters of drinking water every year. About 2500 water wells are used to pump up the groundwater from aquifers in the Dutch subsurface. More than 50% of these wells will encounter a number of technical problems during their lifetime. The main problem is the decrease in capacity due to well clogging. Clogging shows up after a number of operation years and results in extra, expensive cleaning operations and in early replacement of the pumping wells. This problem has been acknowledged by other industries, for example the metal, petroleum, beer industry and underground storage projects. Well clogging is the result of a number of interacting mechanisms creating a complex problem in the subsurface. In most clogging cases mechanical mechanisms are involved. A large number of studies have been performed to comprehend these processes. Investigations on mechanical processes are focused on transport of small particles through pores and deposition of particles due to physical or physical-chemical processes. After a period of deposition the particles plug the pores and decrease the permeability of the medium. Particle deposition in porous media is usually modelled using filtration theory. In order to get the dynamics of clogging this theory is not sufficient. The porous media is continuously altered due to deposition and mobilization. Therefore the capture characteristics will also continuously change and deposition rates will change in time. A new formula is derived to describe (re)mobilization of particles and allow changing deposition rates. This approach incorporates detachment and reattachment of deposited particles. This work also includes derivation of the filtration theory in radial coordinates. A comparison between the radial filtration theory and the new formula will be shown.

  17. Using Social Media "Smartly" in the Admissions Process

    ERIC Educational Resources Information Center

    Parrot, Teresa Valerio; Tipton, Stacia

    2010-01-01

    Admissions officers around the country are hearing consistent calls to enhance their social media presence. Whether the pressure is from administrators, influential alumni, or peers across institutions, social media are touted as the next big thing in admissions marketing. But are social media strategies truly "strategic," or are they merely…

  18. Media Literacy Education in Turkey: An Evaluation of Media Processes and Ethical Codes

    ERIC Educational Resources Information Center

    Elma, Cevat; Kesten, Alper; Dicle, Abdullah N.; Uzun, Elif Mercan

    2010-01-01

    The purpose of this study is to evaluate school principals', teachers', parents', and students' opinions, arising from participation in a pilot program which used a media literacy curriculum in Turkey. The research population covers all seventh grade students who attended the media literacy course during the 2006-2007 academic year, in five pilot…

  19. Social media processes in disasters: Implications of emergent technology use.

    PubMed

    Murthy, Dhiraj; Gross, Alexander J

    2017-03-01

    This article seeks to extend social science scholarship on social media technology use during disruptive events. Though social media's role in times of crisis has been previously studied, much of this work tends to focus on first-responders and relief organizations. However, social media use during disasters tends to be decentralized and this organizational structure can promote different types of messages to top-down information systems. Using 142,786 geo-tagged tweets collected before and after Hurricane Sandy's US landfall as a case study, this article seeks to explore shifts in social media behavior during disruptive events and highlights that though Sandy disrupted routine life within Twitter, users responded to the disaster by employing humor, sharing photos, and checking into locations. We conclude that social media use during disruptive events is complex and understanding these nuanced behaviors is important across the social sciences.

  20. Examination of the mass media process and personal factors affecting the assessment of mass media-disseminated health information.

    PubMed

    Avcı, Kadriye; Çakır, Tülin; Avşar, Zakir; Üzel Taş, Hanife

    2015-06-01

    This study examined the mass media and personal characteristics leading to health communication inequality as well as the role of certain factors in health communication's mass media process. Using both sociodemographic variables and Maletzke's model as a basis, we investigated the relationship between selected components of the mass communication process, the receiving of reliable health information as a result of health communication, and the condition of its use. The study involved 1853 people in Turkey and was structured in two parts. The first part dealt with questions regarding sociodemographic characteristics, the use of the mass media and the public's ability to obtain health information from it, the public's perception of the trustworthiness of health information, and the state of translating this information into health-promoting behaviours. In the second part, questions related to the mass communication process were posed using a five-point Likert scale. This section tried to establish structural equation modelling using the judgements prepared on the basis of the mass media model. Through this study, it has been observed that sociodemographic factors such as education and age affect individuals' use of and access to communication channels; individuals' trust in and selection of health information from the programme content and their changing health behaviours (as a result of the health information) are related to both their perception of the mass communication process and to sociodemographic factors, but are more strongly related to the former.

  1. Integrating social media and social marketing: a four-step process.

    PubMed

    Thackeray, Rosemary; Neiger, Brad L; Keller, Heidi

    2012-03-01

    Social media is a group of Internet-based applications that allows individuals to create, collaborate, and share content with one another. Practitioners can realize social media's untapped potential by incorporating it as part of the larger social marketing strategy, beyond promotion. Social media, if used correctly, may help organizations increase their capacity for putting the consumer at the center of the social marketing process. The purpose of this article is to provide a template for strategic thinking to successfully include social media as part of the social marketing strategy by using a four-step process.

  2. Mass Media; A Worktext in the Processes of Modern Communication.

    ERIC Educational Resources Information Center

    Heintz, Ann Christine; And Others

    This workbook introduces key concepts and issues related to the mass media. Students perform activities related to these concepts and issues to understand the part they play in their own lives. The usual format consists of a probe, a lab, a focus, an interface, an investigation, and a simulation. For example, one probe is "What are some qualities…

  3. Exploring Media Processes and Project Applications: Rediscovering Shrinky Dinks

    ERIC Educational Resources Information Center

    Wolf Bordonaro, Gaelynn P.; Blake, Ann; Corrington, Deborah; Fanders, Tegan; Morley, Lauren

    2009-01-01

    Shrinky Dinks[R] are a plastic-sheet material that shrinks, hardens and thickens when heated in a traditional or toaster oven. The material was a favorite of generations, but many contemporary students and professionals in art have never had the opportunity to play with the unique media. This article discusses Shrinky Dinks and the importance of…

  4. Community Integration, Local Media Use, and Democratic Processes.

    ERIC Educational Resources Information Center

    McLeod, Jack M.; And Others

    1996-01-01

    Explicates the concept of community integration and its dimensions. Specifies structural and media antecedents and political consequences of these dimensions. Uses 15 indicators to test the hypothesis that integration is a multidimensional concept. Reveals that community integration has at least five dimensions: psychological attachment,…

  5. Cyberbullying behavior and adolescents' use of media with antisocial content: a cyclic process model.

    PubMed

    den Hamer, Anouk; Konijn, Elly A; Keijer, Micha G

    2014-02-01

    The present study examined the role of media use in adolescents' cyberbullying behavior. Following previous research, we propose a Cyclic Process Model of face-to-face victimization and cyberbullying through two mediating processes of anger/frustration and antisocial media content. This model was tested utilizing a cross-sectional design with adolescent participants (N=892). Exposure to antisocial media content was measured with a newly developed content-based scale (i.e., the C-ME), showing good psychometric qualities. Results of structural equation modeling showed that adolescents' exposure to antisocial media content was significantly associated with cyberbullying behavior, especially in adolescents who experienced anger and frustration due to face-to-face victimization. Goodness of fit indices demonstrated a good fit of the theoretical model to the data and indicated that exposure to antisocial media content acts as an amplifier in a cyclic process of victimization-related anger and cyberbullying behavior.

  6. Psychological Processes Promoting the Relation Between Exposure to Media Violence and Aggressive Behavior by the Viewer.

    ERIC Educational Resources Information Center

    Huesmann, L. Rowell

    1986-01-01

    Argues that the effect of media violence on individual differences in aggression is primarily the result of a cumulative learning process during childhood. Presents a developmental theory holding that a child's repeated viewing of media violence, in combination with other factors, can culminate in aggressive behavior patterns (including…

  7. Learning and Collective Knowledge Construction with Social Media: A Process-Oriented Perspective

    ERIC Educational Resources Information Center

    Kimmerle, Joachim; Moskaliuk, Johannes; Oeberst, Aileen; Cress, Ulrike

    2015-01-01

    Social media are increasingly being used for educational purposes. The first part of this article briefly reviews literature that reports on educational applications of social media tools. The second part discusses theories that may provide a basis for analyzing the processes that are relevant for individual learning and collective knowledge…

  8. Gaussian process modelling for uncertainty quantification in convectively-enhanced dissolution processes in porous media

    NASA Astrophysics Data System (ADS)

    Crevillén-García, D.; Wilkinson, R. D.; Shah, A. A.; Power, H.

    2017-01-01

    Numerical groundwater flow and dissolution models of physico-chemical processes in deep aquifers are usually subject to uncertainty in one or more of the model input parameters. This uncertainty is propagated through the equations and needs to be quantified and characterised in order to rely on the model outputs. In this paper we present a Gaussian process emulation method as a tool for performing uncertainty quantification in mathematical models for convection and dissolution processes in porous media. One of the advantages of this method is its ability to significantly reduce the computational cost of an uncertainty analysis, while yielding accurate results, compared to classical Monte Carlo methods. We apply the methodology to a model of convectively-enhanced dissolution processes occurring during carbon capture and storage. In this model, the Gaussian process methodology fails due to the presence of multiple branches of solutions emanating from a bifurcation point, i.e., two equilibrium states exist rather than one. To overcome this issue we use a classifier as a precursor to the Gaussian process emulation, after which we are able to successfully perform a full uncertainty analysis in the vicinity of the bifurcation point.

  9. Social Media and eBusiness: Cultural Impacts on the Influence Process in Consumer Communities

    NASA Astrophysics Data System (ADS)

    Chen, Yong; Chen, Hong; Xu, Li

    2016-08-01

    Social media has been used as an important tool by firms to influence consumers’ attitude and behavior. Influence occurs in consumer communities in social media because community members have the control of discovering, producing, sharing, and distributing information and because the spread out of their experiences and opinions in the format of electronic word-of-mouth forms emerging conformance. Prior research has explored how the influence occurring in online social media communities impacts consumers’ attitude and behavior (e.g., product attitude and purchase decision, effectual thinking and behavior, brand trust and brand loyalty). But because social media has the ability of global reach, cross-border factors should not be neglected in studying the influence process. As such, this paper adopts national cultural dimensions identified by Hofstede (1984), individualism/collectivism and power distance particularly, the index of cultural distance, and the social influence theory to explore how culture impacts the influence occurring in consumer communities in social media.

  10. Learning and Collective Knowledge Construction With Social Media: A Process-Oriented Perspective

    PubMed Central

    Kimmerle, Joachim; Moskaliuk, Johannes; Oeberst, Aileen; Cress, Ulrike

    2015-01-01

    Social media are increasingly being used for educational purposes. The first part of this article briefly reviews literature that reports on educational applications of social media tools. The second part discusses theories that may provide a basis for analyzing the processes that are relevant for individual learning and collective knowledge construction. We argue that a systems-theoretical constructivist approach is appropriate to examine the processes of educational social media use, namely, self-organization, the internalization of information, the externalization of knowledge, and the interplay of externalization and internalization providing the basis of a co-evolution of cognitive and social systems. In the third part we present research findings that illustrate and support this systems-theoretical framework. Concluding, we discuss the implications for educational design and for future research on learning and collective knowledge construction with social media. PMID:26246643

  11. Learning and Collective Knowledge Construction With Social Media: A Process-Oriented Perspective.

    PubMed

    Kimmerle, Joachim; Moskaliuk, Johannes; Oeberst, Aileen; Cress, Ulrike

    2015-04-03

    Social media are increasingly being used for educational purposes. The first part of this article briefly reviews literature that reports on educational applications of social media tools. The second part discusses theories that may provide a basis for analyzing the processes that are relevant for individual learning and collective knowledge construction. We argue that a systems-theoretical constructivist approach is appropriate to examine the processes of educational social media use, namely, self-organization, the internalization of information, the externalization of knowledge, and the interplay of externalization and internalization providing the basis of a co-evolution of cognitive and social systems. In the third part we present research findings that illustrate and support this systems-theoretical framework. Concluding, we discuss the implications for educational design and for future research on learning and collective knowledge construction with social media.

  12. Method of treating contaminated HEPA filter media in pulp process

    DOEpatents

    Hu, Jian S.; Argyle, Mark D.; Demmer, Ricky L.; Mondok, Emilio P.

    2003-07-29

    A method for reducing contamination of HEPA filters with radioactive and/or hazardous materials is described. The method includes pre-processing of the filter for removing loose particles. Next, the filter medium is removed from the housing, and the housing is decontaminated. Finally, the filter medium is processed as pulp for removing contaminated particles by physical and/or chemical methods, including gravity, flotation, and dissolution of the particles. The decontaminated filter medium is then disposed of as non-RCRA waste; the particles are collected, stabilized, and disposed of according to well known methods of handling such materials; and the liquid medium in which the pulp was processed is recycled.

  13. The Effect of ICEM on the Development Process of Educational Media in Hungary

    ERIC Educational Resources Information Center

    Tompa, Klara

    2004-01-01

    It is not an easy task to describe how an organization affects educational processes or events. First, the organization is a blend of multiple countries and changes dynamically; second, a segment of educational processes like the reforms of educational media are changing permanently as well. The changes are induced by institutional, legal,…

  14. Local media monitoring in process evaluation. Experiences from the Stockholm Diabetes Prevention Programme.

    PubMed

    Andersson, Camilla Maria; Bjärås, Gunilla; Tillgren, Per; Ostenson, Claes-Göran

    2007-01-01

    We present a rationale and approach for longitudinal analyses of media coverage and content, and illustrate how media monitoring can be used in process evaluations. Within a community-based diabetes prevention project, the Stockholm Diabetes Prevention Program, we analyzed the frequency, prominence, and framing of physical activity in local newspapers of three intervention and two control municipalities. In total, 2,128 stories and advertisements related to physical activity were identified between the years 1997 and 2002. Although stories about physical activity were relatively few (n = 224), they were prominently located in all five local newspapers. Physical activity was framed rather similarly in the municipalities. Health aspects, however, were expressed to a greater extent in stories in two of the intervention municipalities. A limited portion (14%) of the articles could be linked directly to the program. It is not possible to assess to what extent the program has had a disseminating effect on the newspapers' health-related content in general, due to weaknesses of the process tracking system and limitations of the study design. Implications for the design is that an evaluative framework should be preplanned and include data collection about media relationships, media's interest in public health, media coverage prior to the program and coverage in other media for comparisons of general trends in the reporting. The material and the current database, however, provide a good basis for quantitative content analysis and qualitative discourse analysis to yield information on the type, frequency, and content of health reporting in local newspapers.

  15. Chemical conversions in supercritical media: Environmentally sound approaches to processes and materials

    SciTech Connect

    Burns, C.; Borkowsky, S.; Buelow, S.; Langlois, D.; LeLacheur, R.; Mitchell, M.; Tumas, B.; Williams, P.; Waymouth, R.

    1996-07-01

    This is the final report of a two-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The aim of this effort was to evaluate the potential of supercritical fluids (SCF) as reaction media in an effort to develop new, environmentally-friendly methods for chemical synthesis or processing. The use of novel media creates the possibility of opening up substantially different chemical pathways, increasing selectivity (eliminating waste by-products), and enhancing reaction rates (decreasing hold-up times and saving energy). In addition, the use of SCF as reaction media facilitates downstream separations and mitigate or eliminate the need for hazardous solvents on scales from bench top to production. This project employed a highly interdisciplinary approach to investigate the utility of SCFs as reaction media for polymer synthesis and synthetic organic chemistry.

  16. Emotionally anesthetized: media violence induces neural changes during emotional face processing

    PubMed Central

    Stockdale, Laura A.; Morrison, Robert G.; Kmiecik, Matthew J.; Garbarino, James

    2015-01-01

    Media violence exposure causes increased aggression and decreased prosocial behavior, suggesting that media violence desensitizes people to the emotional experience of others. Alterations in emotional face processing following exposure to media violence may result in desensitization to others’ emotional states. This study used scalp electroencephalography methods to examine the link between exposure to violence and neural changes associated with emotional face processing. Twenty-five participants were shown a violent or nonviolent film clip and then completed a gender discrimination stop-signal task using emotional faces. Media violence did not affect the early visual P100 component; however, decreased amplitude was observed in the N170 and P200 event-related potentials following the violent film, indicating that exposure to film violence leads to suppression of holistic face processing and implicit emotional processing. Participants who had just seen a violent film showed increased frontal N200/P300 amplitude. These results suggest that media violence exposure may desensitize people to emotional stimuli and thereby require fewer cognitive resources to inhibit behavior. PMID:25759472

  17. Emotionally anesthetized: media violence induces neural changes during emotional face processing.

    PubMed

    Stockdale, Laura A; Morrison, Robert G; Kmiecik, Matthew J; Garbarino, James; Silton, Rebecca L

    2015-10-01

    Media violence exposure causes increased aggression and decreased prosocial behavior, suggesting that media violence desensitizes people to the emotional experience of others. Alterations in emotional face processing following exposure to media violence may result in desensitization to others' emotional states. This study used scalp electroencephalography methods to examine the link between exposure to violence and neural changes associated with emotional face processing. Twenty-five participants were shown a violent or nonviolent film clip and then completed a gender discrimination stop-signal task using emotional faces. Media violence did not affect the early visual P100 component; however, decreased amplitude was observed in the N170 and P200 event-related potentials following the violent film, indicating that exposure to film violence leads to suppression of holistic face processing and implicit emotional processing. Participants who had just seen a violent film showed increased frontal N200/P300 amplitude. These results suggest that media violence exposure may desensitize people to emotional stimuli and thereby require fewer cognitive resources to inhibit behavior.

  18. Synthesis CNTs Particle Based Abrasive Media for Abrasive Flow Machining Process

    NASA Astrophysics Data System (ADS)

    Kumar, Sonu; Murtaza, Q.; Walia, R. S.; Dhull, S.; Tyagi, P. K.

    2016-02-01

    Abrasive flow machining (AFM) is a modem fine finishing process used for intricate and internal finishing of components or parts. It is based on flowing of viscoelastic abrasive media over the surface to be fine finished. The abrasive media is the important parameter in the AFM process because of its ability to accurately abrade the predefined area along it flow path. In this study, an attempt is made to develop a new abrasive, alumina with Carbon non tubes (CNTs) in viscoelastic medium. CNT s in house produced through chemical vapour deposition technique and characterize through TEM. Performance evaluation of the new abrasive media is carried out by increasing content of CNT s with fixed extrusion pressure, viscosity of media and media flow rate as process parameters and surface finish improvement and material removal as process responses in AFM setup. Significantly improvement has been observed in material removal and maximum improvement of 100% has been observed in the surface finish on the inner cylindrical surface of the cast iron work piece.

  19. Communication as group process media of aircrew performance

    NASA Technical Reports Server (NTRS)

    Kanki, B. G.; Foushee, H. C.

    1989-01-01

    This study of group process was motivated by a high-fidelity flight simulator project in which aircrew performance was found to be better when the crew had recently flown together. Considering recent operating experience as a group-level input factor, aspects of the communication process between crewmembers (Captain and First Officer), were explored as a possible mediator to performance. Communication patterns were defined by a speech act typology adapted for the flightdeck setting and distinguished crews that had previously flown together (FT) from those that had not flown together (NFT). A more open communication channel with respect to information exchange and validation and greater First Officer participation in task-related topics was shown by FT crews while NFT crews engaged in more non-task discourse, a speech mode less structured by roles and probably serving a more interpersonal function. Relationships between the speech categories themselves, representing linguistic, and role-related interdependencies provide guidelines for interpreting the primary findings.

  20. Modeling evaporation from porous media influenced by atmospheric processes

    NASA Astrophysics Data System (ADS)

    Mosthaf, K.; Baber, K.; Flemisch, B.; Helmig, R.

    2012-04-01

    Modeling evaporation processes from partially saturated soils into the ambient air is a challenging task. It involves usually a variety of interacting processes and depends on the multitude of properties of the fluids and of the porous medium. Often, the ambient free-flow and the porous-medium compartments are modeled separately with a specification of the evaporation rate as boundary condition. We have developed a coupling concept, which allows the combined modeling of a free-flow and a porous-medium system under non-isothermal conditions with the evaporative fluxes across the soil-atmosphere interface as model output. It is based on flux continuity and local thermodynamic equilibrium at the interface. Darcy's law for multiple phases is used in the porous medium, whereas the ambient air flow is modeled as a compositional single-phase Stokes system. The concept has been implemented in the numerical simulator DuMux. A comparison of simulated and measured data from wind tunnel experiments performed in the group of D. Or (ETH Zürich) will be shown. Furthermore, the impact of several parameters, such as a varying wind velocity, temperature or different soil properties on the evaporation process has been analyzed in a numerical parameter study. The results will be presented and discussed.

  1. Double resonant processes in 1D nonlinear periodic media

    NASA Astrophysics Data System (ADS)

    Kuzmiak, Vladimir; Konotop, Vladimir

    2001-03-01

    We consider one-dimensional periodic structure consisting of alternating layers fabricated from the materials possessing \\chi^(2) nonlinearity and assume that the filling fraction and the dielectric permittivities of the slabs are chosen in such a way that resonant contions for the generation for the second and third harmonic are satisfied simultaneously. The possibility of such process is demonstrated in the structure consisting of the alternating slabs of AlGaAs and InSb. The wave evolution is described in terms of envelope function approach. By taking account three resonant waves one obtains a system of coupled-mode differential equations. One of the solutions which is of special importance is that of having a constant amplitude and the first and third harmonic having zero amplitude. We analyze the stability of the solutions and show that the use of the double resonance allows one to obtain difference generation. A particular example of such a process is fractional conversion ω arrow (2/3)ω which takes place with the participation of the mode with the frequency ω/3.

  2. Bio-objects and the media: the role of communication in bio-objectification processes

    PubMed Central

    Maeseele, Pieter; Allgaier, Joachim; Martinelli, Lucia

    2013-01-01

    The representation of biological innovations in and through communication and media practices is vital for understanding the nature of “bio-objects” and the process we call “bio-objectification.” This paper discusses two ideal-typical analytical approaches based on different underlying communication models, ie, the traditional (science- and media-centered) and media sociological (a multi-layered process involving various social actors in defining the meanings of scientific and technological developments) approach. In this analysis, the latter is not only found to be the most promising approach for understanding the circulation, (re)production, and (re)configuration of meanings of bio-objects, but also to interpret the relationship between media and science. On the basis of a few selected examples, this paper highlights how media function as a primary arena for the (re)production and (re)configuration of scientific and biomedical information with regards to bio-objects in the public sphere in general, and toward decision-makers, interest groups, and the public in specific. PMID:23771763

  3. Particulate removal processes and hydraulics of porous gravel media filters

    NASA Astrophysics Data System (ADS)

    Minto, J. M.; Phoenix, V. R.; Dorea, C. C.; Haynes, H.; Sloan, W. T.

    2013-12-01

    Sustainable urban Drainage Systems (SuDS) are rapidly gaining acceptance as a low-cost tool for treating urban runoff pollutants close to source. Road runoff water in particular requires treatment due to the presence of high levels of suspended particles and heavy metals adsorbed to these particles. The aim of this research is to elucidate the particle removal processes that occur within gravel filters that have so far been considered as 'black-box' systems. Based on these findings, a better understanding will be attained on what influences gravel filter removal efficiency and how this changes throughout their design life; leading to a more rational design of this useful technology. This has been achieved by tying together three disparate research elements: tracer residence time distribution curves of filters during clogging; 3D magnetic resonance imaging (MRI) of clogging filters and computational fluid dynamics (CFD) modelling of complex filter pore networks. This research relates column average changes in particle removal efficiency and tracer residence time distributions (RTDs) due to clogging with non-invasive measurement of the spatial variability in particle deposition. The CFD modelling provides a link between observed deposition patterns, flow velocities and wall shear stresses as well as the explanations for the change in RTD with clogging and the effect on particle transport. Results show that, as a filter clogs, particles take a longer, more tortuous path through the filter. This is offset by a reduction in filter volume resulting in higher flow velocities and more rapid particle transport. Higher velocities result in higher shear stresses and the development of preferential pathways in which the velocity exceeds the deposition threshold and the overall efficiency of the filter decreases. Initial pore geometry is linked to the pattern of deposition and subsequent formation of preferential pathways. These results shed light on the 'black-box' internal

  4. Cascade processes in stratified media: experiment and direct numerical simulation.

    NASA Astrophysics Data System (ADS)

    Sibgatullin, Ilias; Brouzet, Christophe; Joubaud, Sylvain; Ermanyuk, Evgeny; Dauxois, Thierry

    2016-04-01

    Internal gravity waves may transfer substantial part of energy in oceans and astrophysical objects, influence the background stratification, and angular momentum. Internal waves can be generated by convection in astrophysical objects, by tidal motion and interaction with orography in oceans. Internal and inertial waves obey similar system of equations. Due to very particular type of dispersive relation and the way internal waves are reflected from surfaces, in confined domains the monochromatic internal waves after sequence of reflections may form closed paths, the "wave attractors" [1]. Presently, linear theory of wave attractors is quite elaborated and a principal interest of research is focused on nonlinear regimes and unstable configurations, overturning events and mixing. We have performed direct numerical simulation of wave attractors which closely reproduces experiments [2] being carried out in Ecole Normal Superior de Lyon (ENS de Lyon). Direct numerical simulation is realized with the help of spectral element approach and code nek5000. Triadic resonance is confirmed as the first instability which appears on the most energetic ray of the attractor at sufficiently large forcing. With further increase of the forcing amplitude the daughter waves also become unstable resulting in a sophisticated cascade process which was first observed experimentally. For very high forcing amplitude interaction of focused waves with the walls results in appearance of small-scale folded structures. Their interaction with principal flow is the subject of further research. 1. Maas, L. R. M. & Lam, F.-P. A., Geometric focusing of internal waves. J. Fluid Mech, 1995,. 300, 1-41 2. Scolan, H., Ermanyuk, E., Dauxois, T., 2013, Physical Review Letters, 110, 234501

  5. A System for Processing and Shelving Works of Mixed Media Format.

    ERIC Educational Resources Information Center

    Mann, Thomas J.

    1979-01-01

    A system for processing and shelving mixed media works is described, the advantage of which is its ability to make value judgments reflecting the author's intention as to which format is primary. Security needs, storage space problems, and desirability of maintaining browsing capabilities are also incorporated in this system. (Author/MBR)

  6. Media Literacy and the Policymaking Process: A Framework for Understanding Influences on Potential Educational Policy Outputs.

    ERIC Educational Resources Information Center

    Yates, Bradford L.

    This paper examines some of the key public policy implications of the media literacy movement using D. Easton's (1965) model of the policymaking process. The model has six elements: (1) demands and supports; (2) policymakers; (3) policy outputs; (4) policy outcomes; (5) feedback; and (6) environment. Each element is vital to understanding the…

  7. The Role of Mass Media and Intergroup Relations in the Process of Newcomers' Assimilation.

    ERIC Educational Resources Information Center

    Shim, Jae Chul

    This paper reviews the group-related literature of intergroup relations and combines it with the existing theory of communications. Noting that communication scholars have recently entered this realm of intergoup relations and searched for the role of mass media in the process of ethnic newcomers' socialization, the paper conceptualizes…

  8. Heuristic versus Systematic Processing of Specialist versus Generalist Sources in Online Media

    ERIC Educational Resources Information Center

    Koh, Yoon Jeon; Sundar, S. Shyam

    2010-01-01

    In exploring why specialist sources (e.g., CNN.com) are more persuasive than generalist sources (e.g., CBS.com), this study examines theoretical mechanisms related to information-processing differences caused by these sources. When we have a chain of sources (Websites and agents) in online media, does specialization of one of them bias the…

  9. Suppression of two-photon resonantly enhanced nonlinear processes in extended media

    SciTech Connect

    Garrett, W.R.; Moore, M.A.; Payne, M.G.; Wunderlich, R.K.

    1988-11-01

    On the basis of combined experimental and theoretical studies of nonlinear processes associated with two-photon excitations near 3d and 4d states in Na, we show how resonantly enhanced stimulated hyper-Raman emission, parametric four-wave mixing processes and total resonant two-photon absorption can become severely suppressed through the actions of internally generated fields on the total atomic response in extended media. 7 refs., 3 figs.

  10. Lattice Boltzmann Method for Diffusion-Reaction-Transport Processes in Heterogeneous Porous Media

    NASA Astrophysics Data System (ADS)

    Xu, You-Sheng; Zhong, Yi-Jun; Huang, Guo-Xiang

    2004-07-01

    Based on the lattice Boltzmann method and general theory of fluids flowing in porous media, a numerical model is presented for the diffusion-reaction-transport (DRT) processes in porous media. As a test, we simulate a DRT process in a two-dimensional horizontal heterogeneous porous medium. The influence of gravitation in this case can be neglected, and the DRT process can be described by a strongly heterogeneous diagnostic test strip or a thin confined piece of soil with stochastically distributing property in horizontal directions. The results obtained for the relations between reduced fluid saturation S, concentration c1, and concentration c2 are shown by using the visualization computing technique. The computational efficiency and stability of the model are satisfactory.

  11. Switching industrial production processes from complex to defined media: method development and case study using the example of Penicillium chrysogenum

    PubMed Central

    2012-01-01

    Background Filamentous fungi are versatile cell factories and widely used for the production of antibiotics, organic acids, enzymes and other industrially relevant compounds at large scale. As a fact, industrial production processes employing filamentous fungi are commonly based on complex raw materials. However, considerable lot-to-lot variability of complex media ingredients not only demands for exhaustive incoming components inspection and quality control, but unavoidably affects process stability and performance. Thus, switching bioprocesses from complex to defined media is highly desirable. Results This study presents a strategy for strain characterization of filamentous fungi on partly complex media using redundant mass balancing techniques. Applying the suggested method, interdependencies between specific biomass and side-product formation rates, production of fructooligosaccharides, specific complex media component uptake rates and fungal strains were revealed. A 2-fold increase of the overall penicillin space time yield and a 3-fold increase in the maximum specific penicillin formation rate were reached in defined media compared to complex media. Conclusions The newly developed methodology enabled fast characterization of two different industrial Penicillium chrysogenum candidate strains on complex media based on specific complex media component uptake kinetics and identification of the most promising strain for switching the process from complex to defined conditions. Characterization at different complex/defined media ratios using only a limited number of analytical methods allowed maximizing the overall industrial objectives of increasing both, method throughput and the generation of scientific process understanding. PMID:22727013

  12. Localized electro-thermal processing: a new route to the patterning of magnetic recording media.

    PubMed

    Aziz, M M; Newman, D M; Sidwell, A; Wears, M L; Wright, C D

    2010-12-17

    Previous reports have detailed the fabrication of media able to support high density magnetic recording in both longitudinal and perpendicular formats by the global rapid thermal processing of sputtered non-magnetic precursor films. During processing in this manner a magnetic element is released from its nitride and agglomerates to form a random near mono-dispersion of magnetic nano-particles. Here we explore, primarily through modelling and simulation, the feasibility of processing similarly formulated precursor media not globally but locally. We investigate the potential of using conducting nano-probe tips to produce, via electro-thermal (Joule) heating, a nano-patterned recording medium in the form of regular arrays of magnetic islands in a non-magnetic host. In the first instance we concentrate on the simplest cobalt based precursor medium for which both initial simulation and experimental studies indicate the formation of magnetic islands with dimensions of the order of the tip diameter; this is relatively straightforward. The results signify that if practical production scenarios can be devised to produce technologically significant areas of recording media by the rapid multi-probe repetition of this technique, then processing in this manner offers a promising route to areal recording densities of perhaps 5 Terabit/in(2) even with the simplest cobalt media. We also note that the electro-thermal processing method is potentially extendable to the production of a wide variety of magnetic materials (e.g. PtCo, FeCo, NiFe alloys) and, applied via electrical nano-imprinting type techniques, to the production of a wide variety of patterned structures.

  13. Subdiffusion-absorption process in a system consisting of two different media

    NASA Astrophysics Data System (ADS)

    Kosztołowicz, Tadeusz

    2017-02-01

    Subdiffusion with reaction A +B →B is considered in a system which consists of two homogeneous media joined together; the A particles are mobile, whereas B are static. Subdiffusion and reaction parameters, which are assumed to be independent of time and space variables, can be different in both media. Particles A move freely across the border between the media. In each part of the system, the process is described by the subdiffusion-reaction equations with fractional time derivative. By means of the method presented in this paper, we derive both the fundamental solutions (the Green's functions) P(x, t) to the subdiffusion-reaction equations and the boundary conditions at the border between the media. One of the conditions demands the continuity of a flux and the other one contains the Riemann-Liouville fractional time derivatives ∂α1P (0+,t ) /∂tα1 =(D1/D2 ) ∂α2P (0-,t ) /∂tα2 , where the subdiffusion parameters α1, D1 and α2, D2 are defined in the regions x <0 and x >0 , respectively.

  14. 21 CFR 876.5885 - Tissue culture media for human ex vivo tissue and cell culture processing applications.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Tissue culture media for human ex vivo tissue and cell culture processing applications. 876.5885 Section 876.5885 Food and Drugs FOOD AND DRUG... DEVICES Therapeutic Devices § 876.5885 Tissue culture media for human ex vivo tissue and cell...

  15. 21 CFR 876.5885 - Tissue culture media for human ex vivo tissue and cell culture processing applications.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 8 2014-04-01 2014-04-01 false Tissue culture media for human ex vivo tissue and cell culture processing applications. 876.5885 Section 876.5885 Food and Drugs FOOD AND DRUG... DEVICES Therapeutic Devices § 876.5885 Tissue culture media for human ex vivo tissue and cell...

  16. 21 CFR 876.5885 - Tissue culture media for human ex vivo tissue and cell culture processing applications.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 8 2011-04-01 2011-04-01 false Tissue culture media for human ex vivo tissue and cell culture processing applications. 876.5885 Section 876.5885 Food and Drugs FOOD AND DRUG... DEVICES Therapeutic Devices § 876.5885 Tissue culture media for human ex vivo tissue and cell...

  17. 21 CFR 876.5885 - Tissue culture media for human ex vivo tissue and cell culture processing applications.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 8 2013-04-01 2013-04-01 false Tissue culture media for human ex vivo tissue and cell culture processing applications. 876.5885 Section 876.5885 Food and Drugs FOOD AND DRUG... DEVICES Therapeutic Devices § 876.5885 Tissue culture media for human ex vivo tissue and cell...

  18. 21 CFR 876.5885 - Tissue culture media for human ex vivo tissue and cell culture processing applications.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 8 2012-04-01 2012-04-01 false Tissue culture media for human ex vivo tissue and cell culture processing applications. 876.5885 Section 876.5885 Food and Drugs FOOD AND DRUG... DEVICES Therapeutic Devices § 876.5885 Tissue culture media for human ex vivo tissue and cell...

  19. Colloid release and transport processes in natural and model porous media

    SciTech Connect

    Roy, S.B.; Dzombak, D.A.

    1995-12-01

    Colloidal particles present in porous media may be released and transported over significant distances when contacted with water at low ionic strength. An understanding of this process is of environmental interest because suspended colloidal particles in groundwater may enhance the subsurface transport of contaminants that are sorbed on their surfaces. This research focused on the processes of colloid release and transport in natural porous media of interest in contaminant transport, i.e., high permeability materials with low fines contents. Our objective in this study was to examine the mechanisms of colloid release and transport in a natural sand, and two model systems: latex particles attached on glass beads, and kaolinite particles attached on glass beads. For the appropriate electrolyte conditions, the release of attached colloids from all three porous media was found to be substantial. The total amount of colloids released depended upon the electrolyte composition and concentration. Column effluent data could be described with an advective-dispersive transport equation for colloidal particles with first-order terms for colloid release and deposition rates, by changing the mass of colloids available for release at each electrolyte concentrations.

  20. Selection and Transmission Processes for Information in the Emerging Media Environment: Psychological Motives and Message Characteristics.

    PubMed

    Cappella, Joseph N; Kim, Hyun Suk; Albarracín, Dolores

    2015-07-01

    The emerging media environment introduced fundamental changes in the quality and format of information available to the public, which can now flexibly seek, alter, and disseminate the information they receive. Therefore, the two processes of information selection and information retransmission are crucial for understanding the reach of any information available in the online information environment. From this starting point, we examine the common psychological motives driving information selection and transmission of attitude-relevant information: Defense and accuracy motives adding a focus on interpersonal motives. We also review message factors that can activate psychological motives leading to selection of retransmission of information, such as the desire for novelty and emotional stimulation. We speculate about the directions for the next generation of research necessary to understand exposure as a core outcome in media effects research and theory.

  1. Selection and Transmission Processes for Information in the Emerging Media Environment: Psychological Motives and Message Characteristics

    PubMed Central

    Cappella, Joseph N.; Kim, Hyun Suk; Albarracín, Dolores

    2014-01-01

    The emerging media environment introduced fundamental changes in the quality and format of information available to the public, which can now flexibly seek, alter, and disseminate the information they receive. Therefore, the two processes of information selection and information retransmission are crucial for understanding the reach of any information available in the online information environment. From this starting point, we examine the common psychological motives driving information selection and transmission of attitude-relevant information: Defense and accuracy motives adding a focus on interpersonal motives. We also review message factors that can activate psychological motives leading to selection of retransmission of information, such as the desire for novelty and emotional stimulation. We speculate about the directions for the next generation of research necessary to understand exposure as a core outcome in media effects research and theory. PMID:26190944

  2. Volume Averaging Study of the Capacitive Deionization Process in Homogeneous Porous Media

    DOE PAGES

    Gabitto, Jorge; Tsouris, Costas

    2015-05-05

    Ion storage in porous electrodes is important in applications such as energy storage by supercapacitors, water purification by capacitive deionization, extraction of energy from a salinity difference and heavy ion purification. In this paper, a model is presented to simulate the charge process in homogeneous porous media comprising big pores. It is based on a theory for capacitive charging by ideally polarizable porous electrodes without faradaic reactions or specific adsorption of ions. A volume averaging technique is used to derive the averaged transport equations in the limit of thin electrical double layers. Transport between the electrolyte solution and the chargedmore » wall is described using the Gouy–Chapman–Stern model. The effective transport parameters for isotropic porous media are calculated solving the corresponding closure problems. Finally, the source terms that appear in the average equations are calculated using numerical computations. An alternative way to deal with the source terms is proposed.« less

  3. Volume Averaging Study of the Capacitive Deionization Process in Homogeneous Porous Media

    SciTech Connect

    Gabitto, Jorge; Tsouris, Costas

    2015-05-05

    Ion storage in porous electrodes is important in applications such as energy storage by supercapacitors, water purification by capacitive deionization, extraction of energy from a salinity difference and heavy ion purification. In this paper, a model is presented to simulate the charge process in homogeneous porous media comprising big pores. It is based on a theory for capacitive charging by ideally polarizable porous electrodes without faradaic reactions or specific adsorption of ions. A volume averaging technique is used to derive the averaged transport equations in the limit of thin electrical double layers. Transport between the electrolyte solution and the charged wall is described using the Gouy–Chapman–Stern model. The effective transport parameters for isotropic porous media are calculated solving the corresponding closure problems. Finally, the source terms that appear in the average equations are calculated using numerical computations. An alternative way to deal with the source terms is proposed.

  4. Multiphase Porous Media Modelling: A novel approach to predicting food processing performance.

    PubMed

    Khan, Md Imran H; Joardder, M U H; Kumar, Chandan; Karim, M A

    2016-07-20

    The development of a physics-based model of food processing is essential to improve the quality of processed food and optimise energy consumption. Food materials, particularly plant-based food materials, are complex in nature as they are porous and have hygroscopic properties. A multiphase porous media model for simultaneous heat and mass transfer can provide a realistic understanding of transport processes and thus can help to optimise energy consumption and improve food quality. Although the development of a multiphase porous media model for food processing is a challenging task because of its complexity, many researchers have attempted it. The primary aim of this paper is to present a comprehensive review of the multiphase models available in the literature for different methods of food processing, such as drying, frying, cooking, baking, heating and roasting. A critical review of the parameters that should be considered for multiphase modelling is presented which includes input parameters, material properties, simulation techniques and the hypotheses. A discussion on the general trends in outcomes, such as moisture saturation, temperature profile, pressure variation and evaporation patterns, is also presented. The paper concludes by considering key issues in the existing multiphase models and future directions for development of multiphase models.

  5. Evaluation, engineering and development of advanced cyclone processes. Final separating media evaluation and test report (FSMER). Appendices

    SciTech Connect

    1996-05-01

    This report consists of appendices pertaining to the separating media evaluation (calcium nitrate solution) and testing for an advanced cyclone process. Appendices include: materials safety data, aqueous medium regeneration, pH control strategy, and other notes and data.

  6. The use of physiological solutions or media in calcium phosphate synthesis and processing.

    PubMed

    Tas, A Cuneyt

    2014-05-01

    This review examined the literature to spot uses, if any, of physiological solutions/media for the in situ synthesis of calcium phosphates (CaP) under processing conditions (i.e. temperature, pH, concentration of inorganic ions present in media) mimicking those prevalent in the human hard tissue environments. There happens to be a variety of aqueous solutions or media developed for different purposes; sometimes they have been named as physiological saline, isotonic solution, cell culture solution, metastable CaP solution, supersaturated calcification solution, simulated body fluid or even dialysate solution (for dialysis patients). Most of the time such solutions were not used as the aqueous medium to perform the biomimetic synthesis of calcium phosphates, and their use was usually limited to the in vitro testing of synthetic biomaterials. This review illustrates that only a limited number of research studies used physiological solutions or media such as Earle's balanced salt solution, Bachra et al. solutions or Tris-buffered simulated body fluid solution containing 27mM HCO3(-) for synthesizing CaP, and these studies have consistently reported the formation of X-ray-amorphous CaP nanopowders instead of Ap-CaP or stoichiometric hydroxyapatite (HA, Ca10(PO4)6(OH)2) at 37°C and pH 7.4. By relying on the published articles, this review highlights the significance of the use of aqueous solutions containing 0.8-1.5 mMMg(2+), 22-27mM HCO3(-), 142-145mM Na(+), 5-5.8mM K(+), 103-133mM Cl(-), 1.8-3.75mM Ca(2+), and 0.8-1.67mM HPO4(2-), which essentially mimic the composition and the overall ionic strength of the human extracellular fluid (ECF), in forming the nanospheres of X-ray-amorphous CaP.

  7. Conservation Laws for Coupled Hydro-mechanical Processes in Unsaturated Porous Media: Theory and Implementation

    SciTech Connect

    Borja, R I; White, J A

    2010-02-19

    We develop conservation laws for coupled hydro-mechanical processes in unsaturated porous media using three-phase continuum mixture theory. From the first law of thermodynamics, we identify energy-conjugate variables for constitutive modeling at macroscopic scale. Energy conjugate expressions identified relate a certain measure of effective stress to the deformation of the solid matrix, the degree of saturation to the matrix suction, the pressure in each constituent phase to the corresponding intrinsic volume change of this phase, and the seepage forces to the corresponding pressure gradients. We then develop strong and weak forms of boundary-value problems relevant for 3D finite element modeling of coupled hydro-mechanical processes in unsaturated porous media. The paper highlights a 3D numerical example illustrating the advances in the solution of large-scale coupled finite element systems, as well as the challenges in developing more predictive tools satisfying the basic conservation laws and the observed constitutive responses for unsaturated porous materials.

  8. Lattice Boltzmann simulation of the gas-solid adsorption process in reconstructed random porous media.

    PubMed

    Zhou, L; Qu, Z G; Ding, T; Miao, J Y

    2016-04-01

    The gas-solid adsorption process in reconstructed random porous media is numerically studied with the lattice Boltzmann (LB) method at the pore scale with consideration of interparticle, interfacial, and intraparticle mass transfer performances. Adsorbent structures are reconstructed in two dimensions by employing the quartet structure generation set approach. To implement boundary conditions accurately, all the porous interfacial nodes are recognized and classified into 14 types using a proposed universal program called the boundary recognition and classification program. The multiple-relaxation-time LB model and single-relaxation-time LB model are adopted to simulate flow and mass transport, respectively. The interparticle, interfacial, and intraparticle mass transfer capacities are evaluated with the permeability factor and interparticle transfer coefficient, Langmuir adsorption kinetics, and the solid diffusion model, respectively. Adsorption processes are performed in two groups of adsorbent media with different porosities and particle sizes. External and internal mass transfer resistances govern the adsorption system. A large porosity leads to an early time for adsorption equilibrium because of the controlling factor of external resistance. External and internal resistances are dominant at small and large particle sizes, respectively. Particle size, under which the total resistance is minimum, ranges from 3 to 7 μm with the preset parameters. Pore-scale simulation clearly explains the effect of both external and internal mass transfer resistances. The present paper provides both theoretical and practical guidance for the design and optimization of adsorption systems.

  9. Optimize Operating Conditions on Fine Particle Grinding Process with Vertically Stirred Media Mill

    NASA Astrophysics Data System (ADS)

    Yang, Yang; Rowson, Neil; Ingram, Andy

    2016-11-01

    Stirred media mill recently is commonly utilized among mining process due to its high stressing intensity and efficiency. However, the relationship between size reduction and flow pattern within the mixing pot is still not fully understand. Thus, this work investigates fine particle grinding process within vertically stirred media mills by altering stirrer geometry, tip speed and solids loading. Positron Emitting Particle Tracking (PEPT) technology is utilized to plot routine of particles velocity map. By tacking trajectory of a single particle movement within the mixing vessel, the overall flow pattern is possible to be plotted. Ground calcium carbonate, a main product of Imerys, is chosen as feeding material (feed size D80 30um) mixed with water to form high viscous suspension. To obtain fine size product (normally D80 approximately 2um), large amount of energy is drawn by grinding mill to break particles through impact, shear attrition or compression or a combination of them. The results indicate higher energy efficient is obtained with more dilute suspension. The optimized stirrer proves more energy-saving performance by altering the slurry circulate. Imerys Minerals Limited.

  10. Thermodynamics of Irreversible Processes Applied to Solute Transport in Non Saturated Porous Media

    NASA Astrophysics Data System (ADS)

    Mathieu-Balster, I.; Sicard, J.

    1999-09-01

    Modeling of solute transport in non-saturated and non-isothermal porous media is dealt with by thermodynamics of irreversible processes. This rigorous approach enables us to consider the different kinds of transfer and the coupling. Every physical phenomenon as water phase transition and solute adsorption by the solid matrix can be taken into account. The final model may be applied to several fields such as civil engineering, agronomy, pollution and the assessment of radioactive waste repositories. A numerical modeling taking into account the effect of temperature gradient on solute transport (“Soret effect”) is in the process of implementation in the French software “CESAR-LCPC” of the “Laboratoire Central des Ponts et Chaussées”.

  11. Thermo-hydro-mechanical-chemical processes in fractured-porous media: Benchmarks and examples

    NASA Astrophysics Data System (ADS)

    Kolditz, O.; Shao, H.; Görke, U.; Kalbacher, T.; Bauer, S.; McDermott, C. I.; Wang, W.

    2012-12-01

    The book comprises an assembly of benchmarks and examples for porous media mechanics collected over the last twenty years. Analysis of thermo-hydro-mechanical-chemical (THMC) processes is essential to many applications in environmental engineering, such as geological waste deposition, geothermal energy utilisation, carbon capture and storage, water resources management, hydrology, even climate change. In order to assess the feasibility as well as the safety of geotechnical applications, process-based modelling is the only tool to put numbers, i.e. to quantify future scenarios. This charges a huge responsibility concerning the reliability of computational tools. Benchmarking is an appropriate methodology to verify the quality of modelling tools based on best practices. Moreover, benchmarking and code comparison foster community efforts. The benchmark book is part of the OpenGeoSys initiative - an open source project to share knowledge and experience in environmental analysis and scientific computation.

  12. Iodinated contrast media electro-degradation: process performance and degradation pathways.

    PubMed

    Del Moro, Guido; Pastore, Carlo; Di Iaconi, Claudio; Mascolo, Giuseppe

    2015-02-15

    The electrochemical degradation of six of the most widely used iodinated contrast media was investigated. Batch experiments were performed under constant current conditions using two DSA® electrodes (titanium coated with a proprietary and patented mixed metal oxide solution of precious metals such as iridium, ruthenium, platinum, rhodium and tantalum). The degradation removal never fell below 85% (at a current density of 64 mA/cm(2) with a reaction time of 150 min) when perchlorate was used as the supporting electrolyte; however, when sulphate was used, the degradation performance was above 80% (at a current density of 64 mA/cm(2) with a reaction time of 150 min) for all of the compounds studied. Three main degradation pathways were identified, namely, the reductive de-iodination of the aromatic ring, the reduction of alkyl aromatic amides to simple amides and the de-acylation of N-aromatic amides to produce aromatic amines. However, as amidotrizoate is an aromatic carboxylate, this is added via the decarboxylation reaction. The investigation did not reveal toxicity except for the lower current density used, which has shown a modest toxicity, most likely for some reaction intermediates that are not further degraded. In order to obtain total removal of the contrast media, it was necessary to employ a current intensity between 118 and 182 mA/cm(2) with energy consumption higher than 370 kWh/m(3). Overall, the electrochemical degradation was revealed to be a reliable process for the treatment of iodinated contrast media that can be found in contaminated waters such as hospital wastewater or pharmaceutical waste-contaminated streams.

  13. Process parameter dependent growth phenomena of naproxen nanosuspension manufactured by wet media milling.

    PubMed

    Bitterlich, A; Laabs, C; Krautstrunk, I; Dengler, M; Juhnke, M; Grandeury, A; Bunjes, H; Kwade, A

    2015-05-01

    The production of nanosuspensions has proved to be an effective method for overcoming bioavailability challenges of poorly water soluble drugs. Wet milling in stirred media mills and planetary ball mills has become an established top-down-method for producing such drug nanosuspensions. The quality of the resulting nanosuspension is determined by the stability against agglomeration on the one hand, and the process parameters of the mill on the other hand. In order to understand the occurring dependencies, a detailed screening study, not only on adequate stabilizers, but also on their optimum concentration was carried out for the active pharmaceutical ingredient (API) naproxen in a planetary ball mill. The type and concentration of the stabilizer had a pronounced influence on the minimum particle size obtained. With the best formulation the influence of the relevant process parameters on product quality was investigated to determine the grinding limit of naproxen. Besides the well known phenomenon of particle agglomeration, actual naproxen crystal growth and morphology alterations occurred during the process which has not been observed before. It was shown that, by adjusting the process parameters, those effects could be reduced or eliminated. Thus, besides real grinding and agglomeration a process parameter dependent ripening of the naproxen particles was identified to be a concurrent effect during the naproxen fine grinding process.

  14. ACTIVE MEDIA: Photoprocesses in laser-active media operating in the 400 nm range. II. Photochemical processes

    NASA Astrophysics Data System (ADS)

    Kuznetsova, Rimma T.; Kopylova, T. N.; Degtyarenko, K. M.; Sergeev, A. K.; Nesterenko, S. N.; Mayer, G. V.; Afanas'ev, N. B.; Vereskun, V. N.

    1996-09-01

    The quantum yield of phototransformations, the relative yields of photoproducts, and the half-life of active media based on 2-4(pyridyl)-5-(4-methophenyl) oxazole (4PyPO) and of the substituted derivatives of dipyrazolinylbenzene (PDPDP) were investigated as a function of the concentration of the solution, the length of the active medium, and the parameters of the pump pulses generated by an XeCl laser. The results obtained are interpreted with the help of the data on the lasing efficiency and on the induced-absorption spectra.

  15. Modeling coupled Thermo-Hydro-Mechanical processes including plastic deformation in geological porous media

    NASA Astrophysics Data System (ADS)

    Kelkar, S.; Karra, S.; Pawar, R. J.; Zyvoloski, G.

    2012-12-01

    There has been an increasing interest in the recent years in developing computational tools for analyzing coupled thermal, hydrological and mechanical (THM) processes that occur in geological porous media. This is mainly due to their importance in applications including carbon sequestration, enhanced geothermal systems, oil and gas production from unconventional sources, degradation of Arctic permafrost, and nuclear waste isolation. Large changes in pressures, temperatures and saturation can result due to injection/withdrawal of fluids or emplaced heat sources. These can potentially lead to large changes in the fluid flow and mechanical behavior of the formation, including shear and tensile failure on pre-existing or induced fractures and the associated permeability changes. Due to this, plastic deformation and large changes in material properties such as permeability and porosity can be expected to play an important role in these processes. We describe a general purpose computational code FEHM that has been developed for the purpose of modeling coupled THM processes during multi-phase fluid flow and transport in fractured porous media. The code uses a continuum mechanics approach, based on control volume - finite element method. It is designed to address spatial scales on the order of tens of centimeters to tens of kilometers. While large deformations are important in many situations, we have adapted the small strain formulation as useful insight can be obtained in many problems of practical interest with this approach while remaining computationally manageable. Nonlinearities in the equations and the material properties are handled using a full Jacobian Newton-Raphson technique. Stress-strain relationships are assumed to follow linear elastic/plastic behavior. The code incorporates several plasticity models such as von Mises, Drucker-Prager, and also a large suite of models for coupling flow and mechanical deformation via permeability and stresses

  16. A Communication Process: Electronic Media in Distance Education--A Review.

    ERIC Educational Resources Information Center

    George, Donald; And Others

    1989-01-01

    Reviews the current use of electronic media in distance education, emphasizing Canadian examples. Examines broadcast television, videotape, satellite, telephone, radio, audiocassette, and computer. Discusses trends in media use and institutional development, focusing on education as communication and on the importance of combining different media.…

  17. Combining natural language processing and network analysis to examine how advocacy organizations stimulate conversation on social media.

    PubMed

    Bail, Christopher Andrew

    2016-10-18

    Social media sites are rapidly becoming one of the most important forums for public deliberation about advocacy issues. However, social scientists have not explained why some advocacy organizations produce social media messages that inspire far-ranging conversation among social media users, whereas the vast majority of them receive little or no attention. I argue that advocacy organizations are more likely to inspire comments from new social media audiences if they create "cultural bridges," or produce messages that combine conversational themes within an advocacy field that are seldom discussed together. I use natural language processing, network analysis, and a social media application to analyze how cultural bridges shaped public discourse about autism spectrum disorders on Facebook over the course of 1.5 years, controlling for various characteristics of advocacy organizations, their social media audiences, and the broader social context in which they interact. I show that organizations that create substantial cultural bridges provoke 2.52 times more comments about their messages from new social media users than those that do not, controlling for these factors. This study thus offers a theory of cultural messaging and public deliberation and computational techniques for text analysis and application-based survey research.

  18. Combining natural language processing and network analysis to examine how advocacy organizations stimulate conversation on social media

    PubMed Central

    Bail, Christopher Andrew

    2016-01-01

    Social media sites are rapidly becoming one of the most important forums for public deliberation about advocacy issues. However, social scientists have not explained why some advocacy organizations produce social media messages that inspire far-ranging conversation among social media users, whereas the vast majority of them receive little or no attention. I argue that advocacy organizations are more likely to inspire comments from new social media audiences if they create “cultural bridges,” or produce messages that combine conversational themes within an advocacy field that are seldom discussed together. I use natural language processing, network analysis, and a social media application to analyze how cultural bridges shaped public discourse about autism spectrum disorders on Facebook over the course of 1.5 years, controlling for various characteristics of advocacy organizations, their social media audiences, and the broader social context in which they interact. I show that organizations that create substantial cultural bridges provoke 2.52 times more comments about their messages from new social media users than those that do not, controlling for these factors. This study thus offers a theory of cultural messaging and public deliberation and computational techniques for text analysis and application-based survey research. PMID:27694580

  19. Methods, media and systems for managing a distributed application running in a plurality of digital processing devices

    DOEpatents

    Laadan, Oren; Nieh, Jason; Phung, Dan

    2012-10-02

    Methods, media and systems for managing a distributed application running in a plurality of digital processing devices are provided. In some embodiments, a method includes running one or more processes associated with the distributed application in virtualized operating system environments on a plurality of digital processing devices, suspending the one or more processes, and saving network state information relating to network connections among the one or more processes. The method further include storing process information relating to the one or more processes, recreating the network connections using the saved network state information, and restarting the one or more processes using the stored process information.

  20. Talking Back to the Media Ideal: The Development and Validation of the Critical Processing of Beauty Images Scale

    ERIC Educational Resources Information Center

    Engeln-Maddox, Renee; Miller, Steven A.

    2008-01-01

    This article details the development of the Critical Processing of Beauty Images Scale (CPBI) and studies demonstrating the psychometric soundness of this measure. The CPBI measures women's tendency to engage in critical processing of media images featuring idealized female beauty. Three subscales were identified using exploratory factor analysis…

  1. Using media to improve the informed consent process for youth undergoing pediatric endoscopy and their parents

    PubMed Central

    Yeh, Debra M.; Chun, Stanford; Terrones, Laura; Huang, Jeannie S.

    2017-01-01

    Background and study aims Youth undergoing pediatric endoscopic procedures and their parents demonstrate suboptimal comprehension of the informed consent (IC) process. We developed informational videos discussing key IC elements for pediatric endoscopy and evaluated their effects on youth and parental comprehension of the IC process. Patients and methods A randomized controlled trial of the video intervention was performed among youth undergoing endoscopy and their parents at an academic children’s hospital. Randomization occurred at the time of enrollment using permutated blocks. Following the IC process with the proceduralist, subjects underwent structured interviews to assess IC comprehension. An Informed Consent Overall Score (ICOS: range 0 – 4) for comprehension was calculated. Results Seventy-seven pairs of children and their parents participated. Intervention recipients (N = 37 pairs) demonstrated higher ICOS scores as compared to control counterparts (mean (standard deviation): 3.6 (0.7) v. 2.9 (0.9), intervention v. control parents, P < 0.0001 and 2.7 (1.1) v. 1.7 (1.1), intervention v. control youth, P < 0.0001). Conclusions A media intervention addressing key elements of the IC process for pediatric endoscopy was effective in improving comprehension of IC for youth undergoing endoscopic procedures and their parents. PMID:28191495

  2. Going beyond exposure to local news media: an information-processing examination of public perceptions of food safety.

    PubMed

    Fleming, Kenneth; Thorson, Esther; Zhang, Yuyan

    2006-12-01

    The relationship between local news media and public perceptions of food safety was examined in a statewide telephone survey (n = 524). The theoretical framework of the study was based on a review of the social and psychological factors that affect public concerns about food safety, the relationship between mass communication and risk perception, and the thesis of information-processing strategies and its impact on learning from the news. The results show that information-processing strategies substantially mediated the relationship between local news media and public perceptions of food safety, with elaborative processing being more influential than active reflection in people's learning from the news media. Attention to local television had an independent effect, after demographics, awareness of food safety problems, and perceived safety of local food supply were statistically controlled. Other important predictors included gender, education, ethnicity, and perceived safety of local food supply.

  3. Modeling research on the response of geoelectric fields in a porous media seepage process

    NASA Astrophysics Data System (ADS)

    Zhou, Haitao; Gong, Xulong; Sun, Qiang; Yao, Yahui; Zhang, Rui

    2017-03-01

    Water seepage in rock and soil is a main inducing factor of accidents in many engineering fields such as tunnel engineering, mineral resource exploitation, and rock slopes. Water migration in rock and soil can lead to abnormal geoelectric fields due to the effects of diffusion, adsorption, filtration, and oxidation. This makes it possible to research the seepage law in porous media by measuring the response of geoelectric fields in this process. In this work, we carry out a physical simulation experiment to study the geoelectric field response occurring in the water-migration process. By analyzing the response of first electric potential, spontaneous potentials, and exciting current, we find that both the spontaneous potential and exciting current can reflect the change of seepage flow during the water-infiltration process. The exciting current and first electric potential is applicable to the seepage research on heterogeneous rock and soil, for they can accurately determine the position and velocity of the seepage. Real-time apparent resistivity not only indicates the infiltration area but also reflects the relative water content, i.e., the seepage reached saturation along with the reduction of the apparent resistivity.

  4. Accelerating Exploitation of Low-grade Intelligence through Semantic Text Processing of Social Media

    DTIC Science & Technology

    2013-06-01

    and emoticons . In addition to its unstructured nature, the sheer volume of social media communications sent during events of interest is overwhelming...time information contributed by large communities of social media users can be researched and searched for sources of information relevant to...national security. There is increasing acceptance within the intelligence community of the potential value of social media, but understandably some

  5. Methods, media, and systems for detecting attack on a digital processing device

    SciTech Connect

    Stolfo, Salvatore J.; Li, Wei-Jen; Keromylis, Angelos D.; Androulaki, Elli

    2014-07-22

    Methods, media, and systems for detecting attack are provided. In some embodiments, the methods include: comparing at least part of a document to a static detection model; determining whether attacking code is included in the document based on the comparison of the document to the static detection model; executing at least part of the document; determining whether attacking code is included in the document based on the execution of the at least part of the document; and if attacking code is determined to be included in the document based on at least one of the comparison of the document to the static detection model and the execution of the at least part of the document, reporting the presence of an attack. In some embodiments, the methods include: selecting a data segment in at least one portion of an electronic document; determining whether the arbitrarily selected data segment can be altered without causing the electronic document to result in an error when processed by a corresponding program; in response to determining that the arbitrarily selected data segment can be altered, arbitrarily altering the data segment in the at least one portion of the electronic document to produce an altered electronic document; and determining whether the corresponding program produces an error state when the altered electronic document is processed by the corresponding program.

  6. Methods, media, and systems for detecting attack on a digital processing device

    DOEpatents

    Stolfo, Salvatore J.; Li, Wei-Jen; Keromytis, Angelos D.; Androulaki, Elli

    2017-02-21

    Methods, media, and systems for detecting attack are provided. In some embodiments, the methods include: comparing at least part of a document to a static detection model; determining whether attacking code is included in the document based on the comparison of the document to the static detection model; executing at least part of the document; determining whether attacking code is included in the document based on the execution of the at least part of the document; and if attacking code is determined to be included in the document based on at least one of the comparison of the document to the static detection model and the execution of the at least part of the document, reporting the presence of an attack. In some embodiments, the methods include: selecting a data segment in at least one portion of an electronic document; determining whether the arbitrarily selected data segment can be altered without causing the electronic document to result in an error when processed by a corresponding program; in response to determining that the arbitrarily selected data segment can be altered, arbitrarily altering the data segment in the at least one portion of the electronic document to produce an altered electronic document; and determining whether the corresponding program produces an error state when the altered electronic document is processed by the corresponding program.

  7. Using hypnosis to disrupt face processing: mirrored-self misidentification delusion and different visual media

    PubMed Central

    Connors, Michael H.; Barnier, Amanda J.; Coltheart, Max; Langdon, Robyn; Cox, Rochelle E.; Rivolta, Davide; Halligan, Peter W.

    2014-01-01

    Mirrored-self misidentification delusion is the belief that one’s reflection in the mirror is not oneself. This experiment used hypnotic suggestion to impair normal face processing in healthy participants and recreate key aspects of the delusion in the laboratory. From a pool of 439 participants, 22 high hypnotisable participants (“highs”) and 20 low hypnotisable participants were selected on the basis of their extreme scores on two separately administered measures of hypnotisability. These participants received a hypnotic induction and a suggestion for either impaired (i) self-face recognition or (ii) impaired recognition of all faces. Participants were tested on their ability to recognize themselves in a mirror and other visual media – including a photograph, live video, and handheld mirror – and their ability to recognize other people, including the experimenter and famous faces. Both suggestions produced impaired self-face recognition and recreated key aspects of the delusion in highs. However, only the suggestion for impaired other-face recognition disrupted recognition of other faces, albeit in a minority of highs. The findings confirm that hypnotic suggestion can disrupt face processing and recreate features of mirrored-self misidentification. The variability seen in participants’ responses also corresponds to the heterogeneity seen in clinical patients. An important direction for future research will be to examine sources of this variability within both clinical patients and the hypnotic model. PMID:24994973

  8. Discontinuous percolation transitions in epidemic processes, surface depinning in random media, and Hamiltonian random graphs

    NASA Astrophysics Data System (ADS)

    Bizhani, Golnoosh; Paczuski, Maya; Grassberger, Peter

    2012-07-01

    Discontinuous percolation transitions and the associated tricritical points are manifest in a wide range of both equilibrium and nonequilibrium cooperative phenomena. To demonstrate this, we present and relate the continuous and first-order behaviors in two different classes of models: The first are generalized epidemic processes that describe in their spatially embedded version—either on or off a regular lattice—compact or fractal cluster growth in random media at zero temperature. A random graph version of these processes is mapped onto a model previously proposed for complex social contagion. We compute detailed phase diagrams and compare our numerical results at the tricritical point in d=3 with field theory predictions of Janssen [Phys. Rev. EPLEEE81539-375510.1103/PhysRevE.70.026114 70, 026114 (2004)]. The second class consists of exponential (“Hamiltonian,” i.e., formally equilibrium) random graph models and includes the Strauss and the two-star model, where “chemical potentials” control the densities of links, triangles, or two-stars. When the chemical potentials in either graph model are O(logN), the percolation transition can coincide with a first-order phase transition in the density of links, making the former also discontinuous. Hysteresis loops can then be of mixed order, with second-order behavior for decreasing link fugacity, and a jump (first order) when it increases.

  9. The Principal's Experience through the Process of Implementing Social Media in Schools

    ERIC Educational Resources Information Center

    Lovecchio, Michael J.

    2013-01-01

    As school districts struggle to identify the role social media will play both inside and outside of the classroom, educational leaders can no longer ignore the benefits that these tools provide to students, stakeholders and faculty members. The potential challenges facing school leaders working in schools that utilize social media is extensive.…

  10. Analyzing Public Discourse: Using Media Content Analysis to Understand the Policy Process

    ERIC Educational Resources Information Center

    Saraisky, Nancy Green

    2016-01-01

    One of the most basic and obvious sources of data for education policy analysis is text. This article discusses content analysis as an important part of the methodological toolbox for elucidating patterns and trends about education policy. Focusing specifically on media, I show how media content analysis can produce nuanced insights about the ways…

  11. The Use of Visual Media in the Service of Enriching Mental Thought Processes.

    ERIC Educational Resources Information Center

    Salomon, Gavriel

    1980-01-01

    Discusses the use of visual media as symbol systems that gather, package, and convey knowledge. Media's different and often unique symbol systems are looked at as potentially serving as cultivators of mental abilities. Forty-nine references are provided. (Author/CHC)

  12. Mortgaging the First Amendment: Strategic Use of the Regulatory Process and the Electronic Media.

    ERIC Educational Resources Information Center

    O'Donnell, Shawn

    This analysis of First Amendment rights for the electronic media recounts the stories of the broadcasting/cable industry must-carry compromise of 1986 and the failed codification of the Fairness Doctrine in 1987. It is noted that these cases were peculiar because, in each instance, the most powerful media in the country willingly sought abridgment…

  13. Consumable Process Development for Chemical Mechanical Planarization of Bit Patterned Media for Magnetic Storage Fabrication

    NASA Astrophysics Data System (ADS)

    Bonivel, Joseph T., Jr.

    2010-09-01

    As the superparamagnetic limit is reached, the magnetic storage industry looks to circumvent the barrier by implementing patterned media (PM) as a viable means to store and access data. Chemical mechanical polishing (CMP) is a semiconductor fabrication technique used to planarize surfaces and is investigated as a method to ensure that the PM is polished to surface roughness parameters that allow the magnetic read/write head to move seamlessly across the PM. Results from this research have implications in feasibility studies of utilizing CMP as the main planarization technique for PM fabrication. Benchmark data on the output parameters of the CMP process, for bit patterned media (BPM), based on the machine process parameters, pad properties, and slurry characteristics are optimized. The research was conducted in a systematic manner in which the optimized parameters for each phase are utilized in future phases. The optimum results from each of the phases provide an overall optimum characterization for BPM CMP. Results on the CMP machine input parameters indicate that for optimal surface roughness and material removal, low polish pressures and high velocities should be used on the BPM. Pad characteristics were monitored by non destructive technique and results indicate much faster deterioration of all padcharacteristics versus polish time of BPM when compared to IC CMP. The optimum pad for PM polishing was the IC 1400 dual layer Suba V pad with a shore hardness of 57, and a k-groove pattern. The final phase of polishing evaluated the slurry polishing properties and novel nanodiamond (ND) slurry was created and benchmarked on BPM. The resulting CMP output parameters were monitored and neither the ND slurry nor the thermally responsive polymer slurry performed better than the commercially available Cabot iCue slurry for MRR or surface roughness. Research results indicate CMP is a feasible planarization technique for PM fabrication, but successful implementation of CMP

  14. Effects of Test Media on Different EFL Test-Takers in Writing Scores and in the Cognitive Writing Process

    ERIC Educational Resources Information Center

    Zou, Xiao-Ling; Chen, Yan-Min

    2016-01-01

    The effects of computer and paper test media on EFL test-takers with different computer familiarity in writing scores and in the cognitive writing process have been comprehensively explored from the learners' aspect as well as on the basis of related theories and practice. The results indicate significant differences in test scores among the…

  15. VARIATIONS IN INSTRUCTIONAL MEDIA, PROCESSES, CONTENT AND APTITUDE VARIABLES IN RELATION TO EFFICIENCY OF COGNITIVE GOAL ATTAINMENT, VOLUME 1.

    ERIC Educational Resources Information Center

    FATTU, N. A.

    A SERIES OF STUDIES WAS UNDERTAKEN, DIRECTED TOWARD EXPLORATIONS OF INTERRELATIONSHIPS AMONG MEDIA, PROCESSES (INSTRUCTIONAL PREREQUISITES), CONTENT AND APTITUDE VARIABLES, AND ACHIEVEMENTS. EMPHASIS THROUGHOUT WAS ON (1) THE COGNITIVE DOMAIN AND (2) PROBLEMS INVOLVED IN APPLICATION OF KNOWLEDGE TO A PRACTICAL TEACHING SITUATION. "THE…

  16. Complete FDTD analysis of microwave heating processes in frequency-dependent and temperature dependent media

    SciTech Connect

    Torres, F.; Jecko, B.

    1997-01-01

    It is well known that the temperature rise in a material modifies its physical properties and, particularly, its dielectric permittivity. The dissipated electromagnetic power involved in microwave heating processes depending on {var_epsilon}({omega}), the electrical characteristics of the heated media must vary with the temperature to achieve realistic simulations. In this paper, the authors present a fast and accurate algorithm allowing, through a combined electromagnetic and thermal procedure, to take into account the influence of the temperature on the electrical properties of materials. First, the temperature dependence of the complex permittivity ruled by a Debye relaxation equation is investigated, and a realistic model is proposed and validated. Then, a frequency-dependent finite-differences time-domain ((FD){sup 2}TD) method is used to assess the instantaneous electromagnetic power lost by dielectric hysteresis. Within the same iteration, a time-scaled form of the heat transfer equation allows one to calculate the temperature distribution in the heated medium and then to correct the dielectric properties of the material using the proposed model. These new characteristics will be taken into account by the EM solver at the next iteration. This combined algorithm allows a significant reduction of computation time. An application to a microwave oven is proposed.

  17. Statistical media and process optimization for biotransformation of rice bran to vanillin using Pediococcus acidilactici.

    PubMed

    Kaur, Baljinder; Chakraborty, Debkumar

    2013-11-01

    An isolate of P. acidilactici capable of producing vanillin from rice bran was isolated from a milk product. Response Surface Methodology was employed for statistical media and process optimization for production of biovanillin. Statistical medium optimization was done in two steps involving Placket Burman Design and Central Composite Response Designs. The RSM optimized vanillin production medium consisted of 15% (w/v) rice bran, 0.5% (w/v) peptone, 0.1% (w/v) ammonium nitrate, 0.005% (w/v) ferulic acid, 0.005% (w/v) magnesium sulphate, and 0.1% (v/v) tween-80, pH 5.6, at a temperature of 37 degrees C under shaking conditions at 180 rpm. 1.269 g/L vanillin was obtained within 24 h of incubation in optimized culture medium. This is the first report indicating such a high vanillin yield obtained during biotransformation of ferulic acid to vanillin using a Pediococcal isolate.

  18. Examining the effects of media on learners' mental representations and cognitive processes in science

    NASA Astrophysics Data System (ADS)

    Carr, Adrienne L.

    This study examined the effects of television and video games as media on the science knowledge and understanding of middle school students in a Midwest, urban charter school. Twenty-five study participants were organized into eight focus groups. Each group, which comprised of three to four members, was introduced to one of two media types, a television show episode or video games, and then asked a series of questions prompting group dialogue. Results show that students were able to distinguish science ideas presented in the media and made science content connections from previous classroom learning. Implications suggest how teachers can utilize weapons of mass instruction, the tools of media technology, to fight against the challenges that plague our current system of education.

  19. Fundamental heat transfer processes related to phase change thermal storage media

    SciTech Connect

    Sparrow, E. M.; Ramsey, J. W.

    1981-01-01

    Research on fundamental heat transfer processes which occur in phase-change thermal storage systems is described. The research encompasses both melting and freezing, and includes both experiment and analysis. The status of four research problems is discussed. One of the freezing problems was focused on investigating, via experiment, the extent to which freezing can be enhanced by the attachment of fins to the external surface of a cooled vertical tube situated in a liquid phase-change medium. Very substantial enhancements were encountered which neutralize the degradation of freezing due to the thermal resistance of the frozen layer and to natural convection in the liquid phase. The second of the freezing problems was analytical in nature and sought to obtain solutions involving both the phase-change medium and the heat transfer fluid used either to add heat to or extract heat from the medium. For freezing on a plane wall, it was possible to obtain a closed-form analytical solution, while for freezing about a coolant-carrying circular tube, a new numerical methodology was devised to obtain finite-difference solutions. For melting, quantitative design-quality heat transfer coefficients were determined experimentally for melting adjacent to a heated vertical tube. These experiments explored the effects of solid-phase subcooling and of open versus closed top containment on the coefficients. A dimensionless correlation enables these results to be used for a wide range of phase-change media. Studies on melting of a phase-change material situated within a circular tube are in progress.

  20. Developing the Second Language Writing Process through Social Media-Based Interaction Tasks

    ERIC Educational Resources Information Center

    Gómez, Julian Esteban Zapata

    2015-01-01

    This paper depicts the results from a qualitative research study focused on finding out the effect of interaction through social media on the development of second language learners' written production from a private school in Medellín, Antioquia, Colombia. The study was framed within concepts such as "social interaction," "digital…

  1. Developing Critically Thoughtful, Media-Rich Lessons in Science: Process and Product

    ERIC Educational Resources Information Center

    Balcaen, Philip

    2008-01-01

    In this paper, I describe a professional development approach and a conceptual framework used to create critically thoughtful and media-rich science learning resources. Greater clarity about the nature of critical thinking and how to support teachers in learning to implement it are needed if we are to respond to broader calls for critical thinking…

  2. Utilization of Re-processed Anaerobically Digested Fiber from Dairy Manure as a Container Media Substrate

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The solid fraction (fiber) from the effluent of the anaerobic digestion of dairy manure by plug flow technology yields material that has consistent physical properties (total porosity, air filled porosity at saturation, and water holding capacity) to perform satisfactorily as a plant growth media su...

  3. Practical Tips to Help the Collaborative Process Work More Effectively in the School Library Media Program

    ERIC Educational Resources Information Center

    Collett, Amy

    2008-01-01

    In this article, the author presents six tips to help school library media specialists achieve effective collaboration with teachers: (1) Schedule a set time for collaboration meetings and use a meeting log; (2) Be flexible; (3) Be an advocate for collaboration; (4) Co-plan, co-teach, and co-access; (5) Be positive; and (6) Keep a meeting log, log…

  4. Factors influencing public risk-benefit considerations of nanotechnology: Assessing the effects of mass media, interpersonal communication, and elaborative processing.

    PubMed

    Ho, Shirley S; Scheufele, Dietram A; Corley, Elizabeth A

    2013-07-01

    This study examines the influence of mass media, interpersonal communication, and elaborative processing on public perception of benefits and risks of nanotechnology, based on a large-scale nationally representative telephone survey of U.S. adult citizens. Results indicate that cognitive processes in the form of news elaboration had a significant positive main effect on benefits outweigh risks perception. The influences of attention to science in newspapers, attention to science news on television, and interpersonal communication about science on public perception of benefits outweigh risks were moderated by elaborative processing, after controlling for socio-demographic variables, religious beliefs, trust in scientists, and scientific knowledge. The findings highlight the importance of elaborative processing when it comes to understanding how the mass media differentially influence public benefits outweigh risks perception of emerging technologies. Specifically, high elaborative processing emphasizes higher levels of perceived benefits outweigh risks than low elaborative processing. This study explores explanations for this phenomenon and offers implications for future research and policy.

  5. Fate and transport with material response characterization of green sorption media for copper removal via desorption process.

    PubMed

    Chang, Ni-Bin; Houmann, Cameron; Lin, Kuen-Song; Wanielista, Martin

    2016-07-01

    Multiple adsorption and desorption cycles are required to achieve the reliable operation of copper removal and recovery. A green sorption media mixture composed of recycled tire chunk, expanded clay aggregate, and coconut coir was evaluated in this study for its desorptive characteristics as a companion study of the corresponding adsorption process in an earlier publication. We conducted a screening of potential desorbing agents, batch desorption equilibrium and kinetic studies, and batch tests through 3 adsorption/desorption cycles. The desorbing agent screening revealed that hydrochloric acid has good potential for copper desorption. Equilibrium data fit the Freundlich isotherm, whereas kinetic data had high correlation with the Lagergren pseudo second-order model and revealed a rapid desorption reaction. Batch equilibrium data over 3 adsorption/desorption cycles showed that the coconut coir and media mixture were the most resilient, demonstrating they could be used through 3 or more adsorption/desorption cycles. FE-SEM imaging, XRD, and EDS analyses supported the batch adsorption and desorption results showing significant surface sorption of CuO species in the media mixture and coconut coir, followed by partial desorption using 0.1 M HCl as a desorbing agent.

  6. Processes affecting soil and groundwater contamination by DNAPL in low-permeability media

    SciTech Connect

    McWhorter, D.B.

    1996-08-01

    This paper is one of a set of focus papers intended to document the current knowledge relevant to the contamination and remediation of soils and ground water by dense, nonaqueous phase liquids (DNAPL). The emphasis is on low permeability media such as fractured clay and till and unconsolidated, stratified formations. Basic concepts pertaining to immiscible-fluid mixtures are described and used to discuss such aspects as DNAPL transport, dissolved-phase transport, and equilibrium mass distributions. Several implications for remediation are presented. 27 refs., 8 figs., 4 tabs.

  7. Social Media and Language Processing: How Facebook and Twitter Provide the Best Frequency Estimates for Studying Word Recognition.

    PubMed

    Herdağdelen, Amaç; Marelli, Marco

    2016-08-01

    Corpus-based word frequencies are one of the most important predictors in language processing tasks. Frequencies based on conversational corpora (such as movie subtitles) are shown to better capture the variance in lexical decision tasks compared to traditional corpora. In this study, we show that frequencies computed from social media are currently the best frequency-based estimators of lexical decision reaction times (up to 3.6% increase in explained variance). The results are robust (observed for Twitter- and Facebook-based frequencies on American English and British English datasets) and are still substantial when we control for corpus size.

  8. Oxidative leaching process with cupric ion in hydrochloric acid media for recovery of Pd and Rh from spent catalytic converters.

    PubMed

    Nogueira, C A; Paiva, A P; Oliveira, P C; Costa, M C; da Costa, A M Rosa

    2014-08-15

    The recycling of platinum-group metals from wastes such as autocatalytic converters is getting growing attention due to the scarcity of these precious metals and the market pressure originated by increase of demand in current and emerging applications. Hydrometallurgical treatment of such wastes is an alternative way to the most usual pyrometallurgical processes based on smelter operations. This paper focuses on the development of a leaching process using cupric chloride as oxidising agent, in HCl media, for recovery of palladium and rhodium from a spent catalyst. The chloride media allows the adequate conditions for oxidising and solubilising the metals, as demonstrated by equilibrium calculations based on thermodynamic data. The experimental study of the leaching process revealed that Pd solubilisation is clearly easier than that of Rh. The factors temperature, time, and HCl and Cu(2+) concentrations were significant regarding Pd and Rh leaching, the latter requiring higher factor values to achieve the same results. Leaching yields of 95% Pd and 86% Rh were achieved under optimised conditions (T = 80 °C, t = 4h, [HCl] = 6M, [Cu(2+)] = 0.3M).

  9. Visual analysis of immiscible displacement processes in porous media under ultrasound effect

    NASA Astrophysics Data System (ADS)

    Naderi, Khosrow; Babadagli, Tayfun

    2011-05-01

    The effect of sonic waves, in particular, ultrasonic radiation, on immiscible displacement in porous media and enhanced oil recovery has been of interest for more than five decades. Attempts were made to investigate the effect through core scale experimental or theoretical models. Visual experiments are useful to scrutinize the reason for improved oil recovery under acoustic waves of different frequency but are not abundant in literature. In this paper, we report observations and analyses as to the effects of ultrasonic energy on immiscible displacement and interaction of the fluid matrix visually in porous media through two-dimensional (2D) sand pack experiments. 2D glass bead models with different wettabilities were saturated with different viscosity oils and water was injected into the models. The experiments were conducted with and without ultrasound. Dynamic water injection experiments were preferred as they had both viscous and capillary forces in effect. The displacement patterns were evaluated both in terms of their shape, size, and the interface characteristics quantitatively and qualitatively to account for the effects of ultrasonic waves on the displacement and the reason for increased oil production under this type of sonic wave. More compact clusters were observed when ultrasonic energy was present in water-wet systems. In the oil-wet cases, more oil was produced after breakthrough when ultrasound was applied and no compact clusters were formed in contrast to the water-wet cases.

  10. Visual analysis of immiscible displacement processes in porous media under ultrasound effect.

    PubMed

    Naderi, Khosrow; Babadagli, Tayfun

    2011-05-01

    The effect of sonic waves, in particular, ultrasonic radiation, on immiscible displacement in porous media and enhanced oil recovery has been of interest for more than five decades. Attempts were made to investigate the effect through core scale experimental or theoretical models. Visual experiments are useful to scrutinize the reason for improved oil recovery under acoustic waves of different frequency but are not abundant in literature. In this paper, we report observations and analyses as to the effects of ultrasonic energy on immiscible displacement and interaction of the fluid matrix visually in porous media through two-dimensional (2D) sand pack experiments. 2D glass bead models with different wettabilities were saturated with different viscosity oils and water was injected into the models. The experiments were conducted with and without ultrasound. Dynamic water injection experiments were preferred as they had both viscous and capillary forces in effect. The displacement patterns were evaluated both in terms of their shape, size, and the interface characteristics quantitatively and qualitatively to account for the effects of ultrasonic waves on the displacement and the reason for increased oil production under this type of sonic wave. More compact clusters were observed when ultrasonic energy was present in water-wet systems. In the oil-wet cases, more oil was produced after breakthrough when ultrasound was applied and no compact clusters were formed in contrast to the water-wet cases.

  11. Characterization and identification of acrylic binding media: influence of UV light on the ageing process.

    PubMed

    Pintus, Valentina; Schreiner, Manfred

    2011-03-01

    This study characterizes and identifies two different acrylic binding media such as Plextol® D498 and Primal® AC33, which are widely used in modern and contemporary art. In order to investigate their fast photooxidative deterioration when exposed to ultraviolet (UV) light, ageing studies on these materials were carried out. For this purpose, pure synthetic materials but also mixed with different inorganic pigments were identified and characterized before and after UV exposure by means of pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS). Particular attention was paid to the comparison of two different analytical methods: (1) single-shot method based on a pyrolysis for the analysis of polymers and (2) double-shot method, which allows a unique combination of thermal desorption for the analysis of volatile compounds and pyrolysis of the polymers themselves. These analyses have been complemented by Fourier transform infrared spectroscopy-attenuated total reflectance (FTIR-ATR) studies. The comparison of the results obtained from unaged samples and UV-aged clearly showed material alterations as well as the formation of new products, which were recorded by FTIR-ATR. Generally, these changes were more pronounced when the acrylic binding media were mixed with pigments. The double-shot technique of Py-GC/MS additionally allowed the detection of the phenolic antioxidant in unaged Plextol® D498, but no oxidation products could be identified by Py-GC/MS in all samples.

  12. Process Performance of Secondary Effluent Granular Media Filtration with and without Preozonation.

    PubMed

    Merlo, Rion; De Las Casas, Carla; Henneman, Seppi; Witzgall, Robert; Yu, William; Ramberg, Steve; Parker, Denny; Ohlinger, Kurt

    2015-07-01

    A 10-month pilot study compared the performance of conventional granular media filtration (CGMF) with granular media filtration with preozonation (OGMF) to determine the effects of preozonation on filter performance. Filtration recoveries were lower for OGMF compared to CMGF when operated at a loading rate of 18.3 m/h. Operation at 18.3 m/h met turbidity requirements for California Department of Public Health Title 22 unrestricted reclaimed water requirements for both OGMF and CGMF. Preozonated secondary effluent at a transferred dose of 3 mg/L resulted in an increase in ultraviolet transmissivity (UVT) of approximately 6% and greater than 5-log inactivation of male-specific bacteriophage MS2. Wet weather flow events resulted in UVT decrease and a decline in MS2 inactivation to less than 3 log attributed to higher ozone demand in the secondary effluent. Preozonation increased N-nitrosodimethlyamine (NDMA) concentration approximately 10 times, but subsequent filtration reduced levels to secondary effluent values. A net increase in NDMA was observed at times.

  13. How scientists view the public, the media and the political process.

    PubMed

    Besley, John C; Nisbet, Matthew

    2013-08-01

    We review past studies on how scientists view the public, the goals of communication, the performance and impacts of the media, and the role of the public in policy decision-making. We add to these past findings by analyzing two recent large-scale surveys of scientists in the UK and US. These analyses show that scientists believe the public is uninformed about science and therefore prone to errors in judgment and policy preferences. Scientists are critical of media coverage generally, yet they also tend to rate favorably their own experience dealing with journalists, believing that such interactions are important both for promoting science literacy and for career advancement. Scientists believe strongly that they should have a role in public debates and view policy-makers as the most important group with which to engage. Few scientists view their role as an enabler of direct public participation in decision-making through formats such as deliberative meetings, and do not believe there are personal benefits for investing in these activities. Implications for future research are discussed, in particular the need to examine how ideology and selective information sources shape scientists' views.

  14. Saturation-dependent solute dispersivity in porous media: Pore-scale processes

    NASA Astrophysics Data System (ADS)

    Raoof, A.; Hassanizadeh, S. M.

    2013-04-01

    It is known that in variably saturated porous media, dispersion coefficient depends on Darcy velocity and water saturation. In one-dimensional flow, it is commonly assumed that the dispersion coefficient is a linear function of velocity. The coefficient of proportionality, called the dispersivity, is considered to depend on saturation. However, there is not much known about its dependence on saturation. In this study, we investigate, using a pore network model, how the longitudinal dispersivity varies nonlinearly with saturation. We schematize the porous medium as a network of pore bodies and pore throats with finite volumes. The pore space is modeled using the multidirectional pore-network concept, which allows for a distribution of pore coordination numbers. This topological property together with the distribution of pore sizes are used to mimic the microstructure of real porous media. The dispersivity is calculated by solving the mass balance equations for solute concentration in all network elements and averaging the concentrations over a large number of pores. We have introduced a new formulation of solute transport within pore space, where we account for different compartments of residual water within drained pores. This formulation makes it possible to capture the effect of limited mixing due to partial filling of the pores under variably saturated conditions. We found that dispersivity increases with the decrease in saturation, it reaches a maximum value, and then decreases with further decrease in saturation. To show the capability of our formulation to properly capture the effect of saturation on solute dispersion, we applied it to model the results of a reported experimental study.

  15. Hydrometallurgical process for the recovery of metal values from spent lithium-ion batteries in citric acid media.

    PubMed

    Chen, Xiangping; Zhou, Tao

    2014-11-01

    In this paper, a hydrometallurgical process has been proposed to recover valuable metals from spent lithium-ion batteries in citric acid media. Leaching efficiencies as high as 97%, 95%, 94%, and 99% of Ni, Co, Mn, and Li were achieved under the optimal leaching experimental conditions of citric acid concentration of 2 mol L(-1), leaching temperature of 80 °C, leaching time of 90 min, liquid-solid ratio of 30 ml g(-1), and 2 vol. % H2O2. For the metals recovery process, nickel and cobalt were selectively precipitated by dimethylglyoxime reagent and ammonium oxalate sequentially. Then manganese was extracted by Na-D2EHPA and the manganese-loaded D2EHPA was stripped with sulfuric acid. The manganese was recovered as MnSO4 in aqueous phase and D2EHPA could be reused after saponification. Finally, lithium was precipitated by 0.5 mol L(-1) sodium phosphate. Under their optimal conditions, the recovery percentages of Ni, Co, Mn, and Li can reach 98%, 97%, 98%, and 89%, respectively. This is a relatively simple route in which all metal values could be effectively leached and recovered in citric acid media.

  16. Droplet fragmentation: 3D imaging of a previously unidentified pore-scale process during multiphase flow in porous media

    PubMed Central

    Pak, Tannaz; Butler, Ian B.; Geiger, Sebastian; van Dijke, Marinus I. J.; Sorbie, Ken S.

    2015-01-01

    Using X-ray computed microtomography, we have visualized and quantified the in situ structure of a trapped nonwetting phase (oil) in a highly heterogeneous carbonate rock after injecting a wetting phase (brine) at low and high capillary numbers. We imaged the process of capillary desaturation in 3D and demonstrated its impacts on the trapped nonwetting phase cluster size distribution. We have identified a previously unidentified pore-scale event during capillary desaturation. This pore-scale event, described as droplet fragmentation of the nonwetting phase, occurs in larger pores. It increases volumetric production of the nonwetting phase after capillary trapping and enlarges the fluid−fluid interface, which can enhance mass transfer between the phases. Droplet fragmentation therefore has implications for a range of multiphase flow processes in natural and engineered porous media with complex heterogeneous pore spaces. PMID:25646491

  17. Plutonium scrap waste processing based on aqueous nitrate and chloride media

    SciTech Connect

    Navratil, J D

    1985-05-13

    A brief review of plutonium scrap aqueous waste processing technology at Rocky Flats is given. Nitric acid unit operations include dissolution and leaching, anion exchange purification and precipitation. Chloride waste processing consists of cation exchange and carbonate precipitation. Ferrite and carrier precipitation waste treatment processes are also described. 3 figs.

  18. Meta-analytic moderators of experimental exposure to media portrayals of women on female appearance satisfaction: Social comparisons as automatic processes.

    PubMed

    Want, Stephen C

    2009-09-01

    Experimental exposure to idealized media portrayals of women is thought to induce social comparisons in female viewers and thereby to be generally detrimental to female viewers' satisfaction with their own appearance. Through meta-analysis, the present paper examines the impact of moderators of this effect, some identified and updated from a prior meta-analysis and some that have hitherto received little attention. Participants' pre-existing appearance concerns and the processing instructions participants were given when exposed to media portrayals were found to significantly moderate effect sizes. With regard to processing instructions, a novel and counter-intuitive pattern was revealed; effect sizes were smallest when participants were instructed to focus on the appearance of women in media portrayals, and largest when participants processed the portrayals on a distracting, non-appearance dimension. These results are interpreted through a framework that suggests that social comparisons are automatic processes, the effects of which can be modified through conscious processing.

  19. [Process characteristics of zeolite media biological aerated filter for treating aquaculture wastewater].

    PubMed

    Jiang, Yi-feng; Liu, Da-hua; Sun, Tong-xi; Chen, Jian-meng

    2010-03-01

    In this study, an up-flow zeolite media biological aerated filter (ZBAF) was developed and employed for the treatment of aquaculture wastewater. The results showed that ZBAF could start up quickly after 7 d and 25 d in viewpoint of mineralization and nitrification. 0.25 m/h and 20:1 were found to be the optimal hydraulic loading and gas/water ratio, under which around 85% of COD and 70% of NH4+ -N were removed stably in the ZBAF. Through analysis of water quality and microorganism along the flow direction, the heterotrophic and nitrifying population occupied respectively in the bottom and top of the filter column, and lower DO concentration was regarded as the boundary zone for these two different groups of chemotrophic bacteria. The changing profiles of biomass (phospholipid-P) and activity (oxygen uptake rate) showed the similar mode along the height of ZBAF, and their maximum values of 114.12 nmol/g and 0.67 mg/(g x h) were detected at the bottom of the filter.

  20. Liquid-phase continuity and solute concentration dynamics during evaporation from porous media: Pore-scale processes near vaporization surface

    NASA Astrophysics Data System (ADS)

    Shokri, N.; Lehmann, P.; Or, D.

    2010-04-01

    Evaporation from porous media involves complex pore scale transport processes affecting liquid phase distribution and fluxes. Often, the initial evaporation rate is nearly constant and supplied by capillary flow from wetted zones below to the surface. Sustaining constant flow against gravity hinges on an upward capillary gradient and on liquid phase continuity with hydraulic conductivity sufficient for supplying evaporative flux. The pore scale liquid phase adjustments during evaporative displacement necessary for maintaining a constant flux have been postulated but rarely measured. In this study we employed detailed imaging using x-ray synchrotron radiation to study liquid phase distribution and dynamics at the most sensitive domain just below the surface of evaporating sand columns. Three-dimensional images at a resolution of 7 microns were obtained from sand column (mean particle size 0.6 mm) initially saturated with calcium iodide solution (4% by mass) to enhance image contrast. Detailed imaging of near-surface liquid phase distribution during evaporation confirmed phase continuity at micrometric scale and provided quantitative estimates of liquid conductance in agreement with values required to supply evaporative flux. Temporal variations in bulk salt concentrations determined from x-ray attenuation were proportional to evaporative water mass loss. Highly resolved salt concentration images revealed existence of evaporating chimneys that supply the bulk of evaporative demand. Delineated mass loss dynamics and salt distribution measured by the x-ray attenuation were in reasonable agreement with a simplified analytical convection-diffusion model for salt dynamics during evaporation from porous media.

  1. Selective separation of copper(II) and nickel(II) from aqueous media using the complexation-ultrafiltration process.

    PubMed

    Molinari, Raffaele; Poerio, Teresa; Argurio, Pietro

    2008-01-01

    The polyethylenimine (PEI) as complexing agent was used to study the complexation-ultrafiltration (CP-UF) process in the selective removal of Cu(II) from Ni(II) contained in aqueous media. Preliminary tests showed that optimal chemical conditions for Cu(II) and Ni(II) complexation by the PEI polymer were pH>6.0 and 8.0, respectively, and polymer/metal weight ratio of 3.0 and 6.0, respectively. The effect of some important operating parameters on process selectivity was studied by performing UF tests at different parameters: pH, polymer/metal weight ratio, transmembrane pressure (TMP), and membrane cut-off in a batch experimental set-up. It was observed that process selectivity was achieved by choosing the pH value for obtaining a preferential copper complexation (pH 6.0), and the polymer/metal ratio needed to bound only the copper ion (3.0). The selective separation by UF tests was performed by using both a laboratory aqueous solution and a real aqueous effluent (water from Emoli torrent, Rende (CS)). The Iris 30 membrane at TMP of 200 kPa (2 bar) for both aqueous media gave the best results. A complete nickel recovery was reached, and copper recovery was the highest for this membrane (94% and 92%). Besides at this pressure, a lower water amount was needed to obtain total nickel recovery by diafiltration. A little higher membrane fouling was obtained by using the river effluent due to the presence of dissolved organic and inorganic matter.

  2. Media milling process optimization for manufacture of drug nanoparticles using design of experiments (DOE).

    PubMed

    Nekkanti, Vijaykumar; Marwah, Ashwani; Pillai, Raviraj

    2015-01-01

    Design of experiments (DOE), a component of Quality by Design (QbD), is systematic and simultaneous evaluation of process variables to develop a product with predetermined quality attributes. This article presents a case study to understand the effects of process variables in a bead milling process used for manufacture of drug nanoparticles. Experiments were designed and results were computed according to a 3-factor, 3-level face-centered central composite design (CCD). The factors investigated were motor speed, pump speed and bead volume. Responses analyzed for evaluating these effects and interactions were milling time, particle size and process yield. Process validation batches were executed using the optimum process conditions obtained from software Design-Expert® to evaluate both the repeatability and reproducibility of bead milling technique. Milling time was optimized to <5 h to obtain the desired particle size (d90 < 400 nm). The desirability function used to optimize the response variables and observed responses were in agreement with experimental values. These results demonstrated the reliability of selected model for manufacture of drug nanoparticles with predictable quality attributes. The optimization of bead milling process variables by applying DOE resulted in considerable decrease in milling time to achieve the desired particle size. The study indicates the applicability of DOE approach to optimize critical process parameters in the manufacture of drug nanoparticles.

  3. Computer Assistance in Multi-Media Educational Publishing. IET Text-Processing Paper 2.

    ERIC Educational Resources Information Center

    Lefrere, Paul; Whalley, Peter

    The use of word processing and digital image processing to develop new methods for preparing and evaluating materials in the Open University and the implications of these developments are discussed. Recent developments in computer and educational technology are reported as they pertain to cost effectiveness both in production efficiency and…

  4. Media Education: Sociology Surveys

    ERIC Educational Resources Information Center

    Fedorov, Alexander

    2007-01-01

    In Russia as well as in foreign countries we can witness sort of the confusion of the terms of "media education" and "media literacy". There are quite a few differences in theoretical approaches to media education, to distinguishing of the most important aims, objectives, means of introduction into the teaching process, etc.…

  5. Applying traditional signal processing techniques to social media exploitation for situational understanding

    NASA Astrophysics Data System (ADS)

    Abdelzaher, Tarek; Roy, Heather; Wang, Shiguang; Giridhar, Prasanna; Al Amin, Md. Tanvir; Bowman, Elizabeth K.; Kolodny, Michael A.

    2016-05-01

    Signal processing techniques such as filtering, detection, estimation and frequency domain analysis have long been applied to extract information from noisy sensor data. This paper describes the exploitation of these signal processing techniques to extract information from social networks, such as Twitter and Instagram. Specifically, we view social networks as noisy sensors that report events in the physical world. We then present a data processing stack for detection, localization, tracking, and veracity analysis of reported events using social network data. We show using a controlled experiment that the behavior of social sources as information relays varies dramatically depending on context. In benign contexts, there is general agreement on events, whereas in conflict scenarios, a significant amount of collective filtering is introduced by conflicted groups, creating a large data distortion. We describe signal processing techniques that mitigate such distortion, resulting in meaningful approximations of actual ground truth, given noisy reported observations. Finally, we briefly present an implementation of the aforementioned social network data processing stack in a sensor network analysis toolkit, called Apollo. Experiences with Apollo show that our techniques are successful at identifying and tracking credible events in the physical world.

  6. Active biopolymers in green non-conventional media: a sustainable tool for developing clean chemical processes.

    PubMed

    Lozano, Pedro; Bernal, Juana M; Nieto, Susana; Gomez, Celia; Garcia-Verdugo, Eduardo; Luis, Santiago V

    2015-12-21

    The greenness of chemical processes turns around two main axes: the selectivity of catalytic transformations, and the separation of pure products. The transfer of the exquisite catalytic efficiency shown by enzymes in nature to chemical processes is an important challenge. By using appropriate reaction systems, the combination of biopolymers with supercritical carbon dioxide (scCO2) and ionic liquids (ILs) resulted in synergetic and outstanding platforms for developing (multi)catalytic green chemical processes, even under flow conditions. The stabilization of biocatalysts, together with the design of straightforward approaches for separation of pure products including the full recovery and reuse of enzymes/ILs systems, are essential elements for developing clean chemical processes. By understanding structure-function relationships of biopolymers in ILs, as well as for ILs themselves (e.g. sponge-like ionic liquids, SLILs; supported ionic liquids-like phases, SILLPs, etc.), several integral green chemical processes of (bio)catalytic transformation and pure product separation are pointed out (e.g. the biocatalytic production of biodiesel in SLILs, etc.). Other developments based on DNA/ILs systems, as pathfinder studies for further technological applications in the near future, are also considered.

  7. Nonlinear optical processing with Fabry-Perot interferometers containing phase recording media

    NASA Technical Reports Server (NTRS)

    Bartholomew, B. J.; Lee, S. H.

    1980-01-01

    New techniques in nonlinear optical processing are explored, based on the operation of intensity level selection as performed by a Fabry-Perot interferometer containing a phase object. The image being processed is recorded on a medium between the mirrors as a spatially varying phase shift less than pi. The interferometer only transmits light through those portions of the object that corresponds to a single value of the phase and hence to a single intensity level in the input. More complicated operations such as thresholding and analog-to-digital conversion are performed by modulating the light source as the different levels are selected. Photoresist and lithium niobate have been used as phase objects, and experimental data for both are presented. Three kinds of Fabry-Perot interferometers have been used to demonstrate nonlinear processing using coherent and incoherent light. Color images have been produced with black and white inputs and white light illumination.

  8. Effect of Different Electrode Materials on the Electropolymerization Process of Aniline in Nitric Acid Media

    NASA Astrophysics Data System (ADS)

    Li, Yaozong; Yi, Yun; Yang, Weifang; Liu, Xiaoqing; Li, Yuanyuan; Wang, Wei

    2017-02-01

    The electropolymerization process of aniline on different electrode surfaces such as Pt, Au, RuTi and polyaniline film in nitric acid solution containing 1 M aniline was investigated by cyclic voltammetry and electrochemical impedance spectroscopy. Proposed electrical equivalent circuits were used to give a further analysis. Results show that the electrode materials accelerate the aniline electropolymerization remarkably as a catalyst, especially the electrochemical oxidation process of monomer aniline to its cation radical, which is the key step to incur the electropolymerization reaction of aniline on the electrode surface. The polymerization of aniline on RuTi electrode has the lowest reaction resistance for its adsorption sites, and the catalytic effects of these different electrodes decrease in the order: RuTi > polyaniline film > Pt > Au. The results also show that several states of polyaniline films are formed during the potential linear scan process in nitric acid solution and the corresponding oxidation and reduction reaction are reversible.

  9. Upward and Downward: Social Comparison Processing of Thin Idealized Media Images

    ERIC Educational Resources Information Center

    Tiggemann, Marika; Polivy, Janet

    2010-01-01

    The present study aimed to investigate the role of social comparison processing in women's responses to thin idealized images. In particular, it was predicted that comparison with the images on the basis of appearance would lead to more negative outcomes than comparison on the basis of intelligence. A sample of 114 women viewed fashion magazine…

  10. Implementationof a modular software system for multiphysical processes in porous media

    NASA Astrophysics Data System (ADS)

    Naumov, Dmitri; Watanabe, Norihiro; Bilke, Lars; Fischer, Thomas; Lehmann, Christoph; Rink, Karsten; Walther, Marc; Wang, Wenqing; Kolditz, Olaf

    2016-04-01

    Subsurface georeservoirs are a candidate technology for large scale energy storage required as part of the transition to renewable energy sources. The increased use of the subsurface results in competing interests and possible impacts on protected entities. To optimize and plan the use of the subsurface in large scale scenario analyses,powerful numerical frameworks are required that aid process understanding and can capture the coupled thermal (T), hydraulic (H), mechanical (M), and chemical (C) processes with high computational efficiency. Due to having a multitude of different couplings between basic T, H, M, or C processes and the necessity to implement new numerical schemes the development focus has moved to software's modularity. The decreased coupling between the components results in two major advantages: easier addition of specialized processes and improvement of the code's testability and therefore its quality. The idea of modularization is implemented on several levels, in addition to library based separation of the previous code version, by using generalized algorithms available in the Standard Template Library and the Boost library, relying on efficient implementations of liner algebra solvers, using concepts when designing new types, and localization of frequently accessed data structures. This procedure shows certain benefits for a flexible high-performance framework applied to the analysis of multipurpose georeservoirs.

  11. Applying Schema Theory to Mass Media Information Processing: Moving toward a Formal Model.

    ERIC Educational Resources Information Center

    Wicks, Robert H.

    Schema theory may be significant in determining if and how news audiences process information. For any given news topic, people have from none to many schemata (cognitive structures that represent organized knowledge about a given concept or type of stimulus abstracted from prior experience) upon which to draw. Models of how schemata are used…

  12. Simulation of EOR (enhanced oil recovery) processes in stochastically generated permeable media

    SciTech Connect

    Waggoner, J.R.; Castillo, J.L.; Lake, L.W. . Dept. of Petroleum Engineering)

    1990-01-01

    Many enhanced oil recovery (EOR) processes involve injecting an agent, such as steam or CO{sub 2}, that is much more mobile than the resident oil. Other EOR processes attempt to improve sweep efficiency by adding polymer or surfactant to the injected water to create a favorable mobility ratio. This study examines the effect of statistically generated heterogeneity on miscible displacements at unfavorable and favorable mobility ratios. The principal goal is to delineate the effects of fingering, dispersion and channeling on volumetric sweep efficiency. Two-dimensional heterogeneous permeability fields are generated with variability (heterogeneity) and spatial correlation as characterizing parameters. Four levels of correlation and three of variability make up a 12 element matrix. At each element of the matrix, a miscible displacement simulation at unit mobility ratio shows the effect of the heterogeneity, and simulations at mobility ratios of 10 and 0.5 show the effect of viscous force differences combined with heterogeneity. 20 refs., 7 figs., 3 tabs.

  13. Optimizing the Presentation of Mental Health Information in Social Media: The Effects of Health Testimonials and Platform on Source Perceptions, Message Processing, and Health Outcomes.

    PubMed

    Quintero Johnson, Jessie M; Yilmaz, Gamze; Najarian, Kristy

    2016-08-30

    Using social media for the purpose of disseminating mental health information is a critical area of scientific inquiry for health communication professionals. The purpose of this study was to investigate whether the presence of a first-person testimonial in educational mental health information placed in Facebook and Twitter messages influenced college students' (N = 257) source perceptions, information processing, cognitive elaboration, health information recall, beliefs, and behavioral intentions. Results show that exposure to social media messages that featured mental health information embedded with a testimonial predicted less source homophily and more critical thoughts about the social media source, less systematic message processing, and less cognitive elaboration. Health information recall was significantly impacted by both the social media platform and message content such that participants in the testimonial condition on Facebook were more likely to recall the health facts in those messages whereas participants who viewed the testimonial in Twitter were less likely to recall the facts in those tweets. Compared to those who read Facebook messages, participants who read Twitter messages reported higher levels of systematic message processing. These findings suggest that the integration of health testimonials into social media messages might inadvertently provoke psychological resistance to mental health information, thereby reducing the persuasive impact of those messages.

  14. Transport processes and mutual interactions of three bacterial strains in saturated porous media

    NASA Astrophysics Data System (ADS)

    Stumpp, Christine; Lawrence, John R.; Hendry, M. Jim; Maloszewski, Pitor

    2010-05-01

    Transport processes of the bacterial strains Klebsiella oxytoca, Burkholderia cepacia G4PR-1 and Pseudomonas sp #5 were investigated in saturated column experiments to study the differences in transport characteristics and the mutual interactions of these strains during transport. Soil column experiments (114 mm long x 33 mm in diameter) were conducted with constant water velocities (3.9-5.7 cm/h) through a medium to coarse grained silica sand. All experiments were performed in freshly packed columns in quadruplicate. Chloride was used as tracer to determine the mean transit time, dispersivity and flow rate. It was injected as a pulse into the columns together with the bacterial strains suspended in artificial groundwater medium. In the first setup, each strain was investigated alone. In the second setup, transport processes were performed injecting two strains simultaneously. Finally, the transport characteristics were studied in successive experiments when one bacterium was resident on the sand grains prior to the introduction of the second strain. In all experiments the peak C/Co bacterial concentrations were attenuated with respect to the conservative tracer chloride and a well defined tailing was observed. A one dimensional mathematical model for advective-dispersive transport that accounts for irreversible and reversible sorption was used to analyze the bacterial breakthrough curves and tailing patterns. It was shown that the sorption parameters were different for the three strains that can be explained by the properties of the bacteria. For the species Klebsiella oxytoca and Burkholderia cepacia G4PR-the transport parameters were mostly in the same range independent of the experimental setup. However, Pseudomonas sp #5, which is a motile bacterium, showed differences in the breakthrough curves and sorption parameters during the experiments. The simultaneous and successive experiments indicated an influence on the reversible sorption processes when another

  15. Media Monopoly in Brazil.

    ERIC Educational Resources Information Center

    Amaral, Roberto; Guimaraes, Cesar

    1994-01-01

    Documents the process of broadcasting media development in Brazil, the failure of new technologies to produce democratization, and the barriers to democratization erected by monopolization and "metastasis." (SR)

  16. The Wave Processes in the Media Having Inelastic Hysteresis with Saturation of The Nonlinear Loss

    NASA Astrophysics Data System (ADS)

    Nazarov, V. E.; Kiyashko, S. B.

    2016-07-01

    We study theoretically the nonlinear wave processes during excitation of a longitudinal harmonic wave in an unbounded medium and the rod resonator with inelastic hysteresis and saturation of the amplitude-dependent loss. The nonlinear-wave characteristics in such systems, namely, the amplitude-dependent loss, variation in the wave-propagation velocity, the resonant-frequency shift, and the higher-harmonic amplitudes are determined. The results of the theoretical and experimental studies of nonlinear effects in the rod resonator of annealed polycrystalline copper are compared. The effective parameters of the hysteretic nonlinearity of this metal are evaluated.

  17. Suppression of flow pulsation activity by relaxation process of additive effect on viscous media transport

    NASA Astrophysics Data System (ADS)

    Kharlamov, S.; Dedeyev, P.; Meucci, L.; Shenderova, I.; Manastirniy, A.; Usenko, M.

    2015-11-01

    The article presents the analysis of the processes occurring together with the turbulent transfer of impulse in mixture of hydrocarbon fluid and polymer solutions (anti-turbulent additives). The study evaluates complex shear flows by popular theoretical and practical methods. Understanding of hydrodynamic and dissipative effects of laminar-turbulent transition tightening and turbulence suppression is provided. The peculiarities of "thin" flow structure in pipeline zones with complex shape walls are evaluated. Recommendations to forecast the local flow parameters, calculation of hydraulic resistance are given.

  18. Monte Carlo simulation with fixed steplength for diffusion processes in nonhomogeneous media

    NASA Astrophysics Data System (ADS)

    Ruiz Barlett, V.; Hoyuelos, M.; Mártin, H. O.

    2013-04-01

    Monte Carlo simulation is one of the most important tools in the study of diffusion processes. For constant diffusion coefficients, an appropriate Gaussian distribution of particle's steplengths can generate exact results, when compared with integration of the diffusion equation. It is important to notice that the same method is completely erroneous when applied to non-homogeneous diffusion coefficients. A simple alternative, jumping at fixed steplengths with appropriate transition probabilities, produces correct results. Here, a model for diffusion of calcium ions in the neuromuscular junction of the crayfish is used as a test to compare Monte Carlo simulation with fixed and Gaussian steplength.

  19. Thermal stresses in chemically hardening elastic media with application to the molding process

    NASA Technical Reports Server (NTRS)

    Levitsky, M.; Shaffer, B. W.

    1974-01-01

    A method has been formulated for the determination of thermal stresses in materials which harden in the presence of an exothermic chemical reaction. Hardening is described by the transformation of the material from an inviscid liquid-like state into an elastic solid, where intermediate states consist of a mixture of the two, in a ratio which is determined by the degree of chemical reaction. The method is illustrated in terms of an infinite slab cast between two rigid mold surfaces. It is found that the stress component normal to the slab surfaces vanishes in the residual state, so that removal of the slab from the mold leaves the remaining residual stress unchanged. On the other hand, the residual stress component parallel to the slab surfaces does not vanish. Its distribution is described as a function of the parameters of the hardening process.

  20. A comparison of ultrasound-based advanced oxidation processes for the removal of X-ray contrast media.

    PubMed

    Ning, B; Graham, N J D; Lickiss, P D

    2009-01-01

    The degradation of specific iodinated X-ray contrast media (ICM) compounds (viz: diatrizoate, iomeprol, iopromide, and iopamidol) by ultrasound irradiation in aqueous solution, with and without the presence of hydrogen peroxide or ozone, has been studied. Experiments were carried out at a constant ultrasound frequency of 20 kHz, at two power intensity values of 17.6 and 200.1 W cm(-2), and at five power densities up to 0.235 W ml(-1). Zero-order kinetic rate constants for the ICM degradation by ultrasound alone were calculated under certain sonication conditions. Pyrolysis appeared to contribute approximately 30%, and radical attack 70%, of the overall ICM degradation performance. The effect of ultrasound intensity on compound degradation (at a given power density) was found to play a negligible role, whereas ultrasound power density was found to be a major factor controlling the overall oxidation process under these conditions. The compound degradation by ultrasound alone was relatively minor, but the addition of hydrogen peroxide in the sonication process gave some improvement with a doubling in the degradation performance at the greatest applied peroxide concentration. The combination of gaseous ozone and ultrasound was found to be very effective in degrading ICM compounds and an almost complete compound removal could be achieved.

  1. Evolution of process control parameters during extended co-composting of green waste and solid fraction of cattle slurry to obtain growing media.

    PubMed

    Cáceres, Rafaela; Coromina, Narcís; Malińska, Krystyna; Marfà, Oriol

    2015-03-01

    This study aimed to monitor process parameters when two by-products (green waste - GW, and the solid fraction of cattle slurry - SFCS) were composted to obtain growing media. Using compost in growing medium mixtures involves prolonged composting processes that can last at least half a year. It is therefore crucial to study the parameters that affect compost stability as measured in the field in order to shorten the composting process at composting facilities. Two mixtures were prepared: GW25 (25% GW and 75% SFCS, v/v) and GW75 (75% GW and 25% SFCS, v/v). The different raw mixtures resulted in the production of two different growing media, and the evolution of process management parameters was different. A new parameter has been proposed to deal with attaining the thermophilic temperature range and maintaining it during composting, not only it would be useful to optimize composting processes, but also to assess the hygienization degree.

  2. Removal of artificial sweetener aspartame from aqueous media by electrochemical advanced oxidation processes.

    PubMed

    Lin, Heng; Oturan, Nihal; Wu, Jie; Sharma, Virender K; Zhang, Hui; Oturan, Mehmet A

    2017-01-01

    The degradation and mineralization of aspartame (ASP) in aqueous solution were investigated, for the first time, by electrochemical advanced oxidation processes (EAOPs) in which hydroxyl radicals were formed concomitantly in the bulk from Fenton reaction via in situ electrogenerated Fenton's reagent and at the anode surface from the water oxidation. Experiments were performed in an undivided cylindrical glass cell with a carbon-felt cathode and a Pt or boron-doped diamond (BDD) anode. The effect of Fe(2+) concentration and applied current on the degradation and mineralization kinetics of ASP was evaluated. The absolute rate constant for the reaction between ASP and OH was determined as (5.23 ± 0.02) × 10(9) M(-1) s(-1) by using the competition kinetic method. Almost complete mineralization of ASP was achieved with BDD anode at 200 mA constant current electrolysis. The formation and generation of the formed carboxylic acids (as ultimate end products before complete mineralization) and released inorganic ion were monitored by ion-exclusion high performance liquid chromatography (HPLC) and ion chromatography techniques, respectively. The global toxicity of the treated ASP solution during treatment was assessed by the Microtox(®) method using V. fischeri bacteria luminescence inhibition.

  3. Integrating Media into the Communication Classroom as an Experiential Learning Tool: A Guide To Processing and Debriefing.

    ERIC Educational Resources Information Center

    Hinck, Shelly Schaefer; And Others

    This paper shows how visual media may be used in the high school and college classroom to foster analytical, communicative, and interpretive skills traditionally developed through reading. It suggests that L. Joplin's (1985) 5-stage experiential learning model and Anita Covert's (1980) EDIT system can be used to teach a range of media. It…

  4. Insights Into Sill Formation Processes From Particle Image Velocimetry (PIV) Analysis of Layered Elastic Media Experiments

    NASA Astrophysics Data System (ADS)

    Kavanagh, J. L.; Boutelier, D. A.; Cruden, A. R.

    2012-12-01

    A key issue in magma intrusion mechanics is constraining the conditions required to initiate sill formation from feeder dykes. To investigate these processes, we present a series of layered gelatine analogue experiments monitored with a Particle Image Velocimetry (PIV) system to document the fluid dynamics in the magma and small-scale deformation processes in the host material as a sill is formed along a weak contact beneath a more rigid layer. Gelatine is a good crustal analogue material to study the dynamics of dyke and sill propagation in the crust. Although gelatine is viscoelastic, tests carried out using a rheometer show that at experimental conditions the gelatine behaves as an almost ideal elastic material at 5-10 °C. Forty litres of hot liquid gelatine is poured into a clear-perspex tank and left to solidify in a fridge at ~5 °C. Experiments are prepared comprising multiple layers, with small strength contrasts (comparable to those between crustal strata) created by varying the gelatine concentration and allowing sufficient time for it to reach the plateau Young's modulus. Both strong and weak interface strengths are investigated by varying the extent of welding between the layers. Injection of dyed water (the magma analogue) into the solid gelatine from below causes a penny-shaped experimental dyke to form. With a constant driving pressure, the propagating experimental dyke becomes arrested beneath a more rigid layer if the Young's modulus contrast is greater than 12%. In the case of a weak interface, a sill is formed by intrusion along the contact between the layers; if the interface is strong a blade-like dyke forms. To monitor displacements within the gelatine using the PIV technique, neutrally buoyant polyamide reflective particles are added to the gelatine during experiment preparation. Two high-speed cameras are positioned outside the tank in a plane perpendicular to the strike of the experimental feeder dyke, and parallel to a high-power laser

  5. A Quantitative and Qualitative Assessment of Verbal Short-Term Memory and Phonological Processing in 8-Year-Olds with a History of Repetitive Otitis Media

    ERIC Educational Resources Information Center

    Majerus, Steve; Amand, Pierre; Boniver, Vincent; Demanez, Jean-Pierre; Demanez, Laurent; Van der Linden, Martial

    2005-01-01

    Language outcome in children experiencing fluctuant hearing loss due to otitis media (OME) remains highly equivocal. In the current study, we assessed performance on highly sensitive verbal short-term memory (STM), new word learning and phonological processing tasks in 8-year-old children who had suffered from recurrent OME before the age of 3.…

  6. Building Library Media Collections: Analysis of Client Groups; Black Studies: A Bibliography; The Role of Evaluation in the Library Media Collection Development Process; [and]"Weeding": Reassessment of Library Media Collections.

    ERIC Educational Resources Information Center

    Maryland State Dept. of Education, Baltimore.

    Designed to aid elementary, middle, junior high, and high school library media staff in developing a quality collection, "Analysis of Client Groups" poses questions about students, faculty and administration, and parents and community. Brief discussions also consider methods for collecting data; review of student records; conversations…

  7. Development of Modeling Methods and Tools for Predicting Coupled Reactive Transport Processes in Porous Media at Multiple Scales

    SciTech Connect

    Clement, T Prabhakar; Barnett, Mark O; Zheng, Chunmiao; Jones, Norman L

    2010-05-05

    DE-FG02-06ER64213: Development of Modeling Methods and Tools for Predicting Coupled Reactive Transport Processes in Porous Media at Multiple Scales Investigators: T. Prabhakar Clement (PD/PI) and Mark O. Barnett (Auburn), Chunmiao Zheng (Univ. of Alabama), and Norman L. Jones (BYU). The objective of this project was to develop scalable modeling approaches for predicting the reactive transport of metal contaminants. We studied two contaminants, a radioactive cation [U(VI)] and a metal(loid) oxyanion system [As(III/V)], and investigated their interactions with two types of subsurface materials, iron and manganese oxyhydroxides. We also developed modeling methods for describing the experimental results. Overall, the project supported 25 researchers at three universities. Produced 15 journal articles, 3 book chapters, 6 PhD dissertations and 6 MS theses. Three key journal articles are: 1) Jeppu et al., A scalable surface complexation modeling framework for predicting arsenate adsorption on goethite-coated sands, Environ. Eng. Sci., 27(2): 147-158, 2010. 2) Loganathan et al., Scaling of adsorption reactions: U(VI) experiments and modeling, Applied Geochemistry, 24 (11), 2051-2060, 2009. 3) Phillippi, et al., Theoretical solid/solution ratio effects on adsorption and transport: uranium (VI) and carbonate, Soil Sci. Soci. of America, 71:329-335, 2007

  8. Macroscopic transport equations in many-body systems from microscopic exclusion processes in disordered media: a review

    NASA Astrophysics Data System (ADS)

    Galanti, Marta; Fanelli, Duccio; Piazza, Francesco

    2016-08-01

    Describing particle transport at the macroscopic or mesoscopic level in non-ideal environments poses fundamental theoretical challenges in domains ranging from inter and intra-cellular transport in biology to diffusion in porous media. Yet, often the nature of the constraints coming from many-body interactions or reflecting a complex and confining environment are better understood and modeled at the microscopic level. In this paper we review the subtle link between microscopic exclusion processes and the mean-field equations that ensue from them in the continuum limit. We show that in an inhomogeneous medium, i.e. when jumps are controlled by site-dependent hopping rates, one can obtain three different nonlinear advection-diffusion equations in the continuum limit, suitable for describing transport in the presence of quenched disorder and external fields, depending on the particular rule embodying site inequivalence at the microscopic level. In a situation that might be termed point-like scenario, when particles are treated as point-like objects, the effect of crowding as imposed at the microscopic level manifests in the mean-field equations only if some degree of inhomogeneity is enforced into the model. Conversely, when interacting agents are assigned a finite size, under the more realistic extended crowding framework, exclusion constraints persist in the unbiased macroscopic representation.

  9. Media Clips

    ERIC Educational Resources Information Center

    Vennebush, G. Patrick

    2004-01-01

    Media Clips aims to offer readers contemporary, authentic applications of quantitative reasoning based on print or electronic media. Clips may be in text or graphic format, and clip sources may be either print or electronic media.

  10. EPA/NSF ETV Equipment Verification Testing Plan for the Removal of Volatile Organic Chemical Contaminants by Adsorptive Media Processes

    EPA Science Inventory

    This document is the Environmental Technology Verification (ETV) Technology Specific Test Plan (TSTP) for evaluation of drinking water treatment equipment utilizing adsorptive media for synthetic organic chemical (SOC) removal. This TSTP is to be used within the structure provid...

  11. Fate and transport with material response characterization of green sorption media for copper removal via adsorption process.

    PubMed

    Chang, Ni-Bin; Houmann, Cameron; Lin, Kuen-Song; Wanielista, Martin

    2016-02-01

    Green adsorption media with the inclusion of renewable and recycled materials can be applied as a stormwater best management practice for copper removal. A green adsorption media mixture composed of recycled tire chunk, expanded clay aggregate, and coconut coir was physicochemically evaluated for its potential use in an upflow media filter. A suite of tests were conducted on the media mixture and the individual media components including studies of particle size distribution, isotherms, column adsorption and reaction kinetics. Isotherm test results revealed that the coconut coir had the highest affinity for copper (q(max) = 71.1 mg g(-1)), and that adsorption was maximized at a pH of 7.0. The coconut coir also performed the best under dynamic conditions, having an equilibrium uptake of 1.63 mg g(-1). FE-SEM imaging found a strong correlation between the porosity of the micro pore structure and the adsorptive capacity. The use of the green adsorption media mixture in isolation or the coconut coir with an expanded clay filtration chamber could be an effective and reliable stormwater best management practice for copper removal.

  12. Media matters.

    PubMed

    Martinez, L M

    1995-01-01

    The impact of the mass media on woman's status was addressed at two 1995 conferences: the Fourth World Conference on Women, held in Beijing, China, and the Congress of the World Association for Christian Communication, held in Puebla, Mexico. The globalization process facilitated by the mass media has served to increase the power of patriarchy, with no advantages to the cause of women's rights. Coverage of popular movements has been suppressed out of deference to male-controlled governments. Coverage of the Beijing Conference highlighted celebrities and personal stories, to the exclusion of the economic and political issues under debate. Television has commodified women, reinforcing their oppression. On the other hand, the alternative media, which tend to be decentralized, democratic, low-cost, and low in technology, are presenting women as subjects rather than objects and deconstructing gender stereotypes. Of concern, however, is the tendency of computer technology to widen the gap between social classes and developed and developing countries. Women must use information networks to disseminate information on women's rights and strengthen the links between women throughout the world.

  13. European MEDIA Programme: the role of 'language' and 'visual images' in the processes of constructing European culture and identity.

    PubMed

    Bozić-Vrbancić, Senka; Vrbancić, Mario; Orlić, Olga

    2008-12-01

    Questions of diversity and multiculturalism are at the heart of many discussions on European supranational identity within contemporary anthropology, sociology, cultural studies, linguistics and so on. Since we are living in a period marked by the economic and political changes which emerged after European unification, a call for a new analysis of heterogeneity, cultural difference and issues of belonging is not surprising. This call has been fuelled by the European Union's concern with "culture" as one of the main driving forces for constructing "European identity". While the official European policy describes European culture as common to all Europeans, Europe is also-seen as representing "unity in diversity". By analysing contemporary European MEDIA policies and programs this article attempts to contribute to a small but growing body of work that explores what role "language" and "visual images" play in the process of constructing European culture and supranational European identity. More specifically, the article explores the complex articulation of language and culture in order to analyse supranational imaginary of European identity as it is expressed through the simple slogan "Europe: unity in diversity". We initially grounded our interest in the politics of identity within the European Union within theoretical frameworks of "power and knowledge" and "identity and subjectivity". We consider contemporary debates in social sciences and humanities over the concepts of language", "culture" and "identity" as inseparable from each other (Ahmed 2000; Brah 1996, 2000; Butler 1993, Derrida 1981; Gilroy 2004; Laclau 1990). Cultural and postcolonial studies theorists (e.g. Brah 1996; Bhabha 1994; Hall 1992, 1996, among others) argue that concepts of "culture" and "identity" signify a historically variable nexus of social meanings. That is to say, "culture" and "identity" are discursive articulations. According to this view, "culture" and "identity" are not separate

  14. Media education.

    PubMed

    Strasburger, Victor C

    2010-11-01

    The American Academy of Pediatrics recognizes that exposure to mass media (eg, television, movies, video and computer games, the Internet, music lyrics and videos, newspapers, magazines, books, advertising) presents health risks for children and adolescents but can provide benefits as well. Media education has the potential to reduce the harmful effects of media and accentuate the positive effects. By understanding and supporting media education, pediatricians can play an important role in reducing harmful effects of media on children and adolescents.

  15. Cooperative catalysis of noncompatible catalysts through compartmentalization: wacker oxidation and enzymatic reduction in a one-pot process in aqueous media.

    PubMed

    Sato, Hirofumi; Hummel, Werner; Gröger, Harald

    2015-04-07

    A Wacker oxidation using CuCl/PdCl2 as a catalyst system was successfully combined with an enzymatic ketone reduction to convert styrene enantioselectively into 1-phenylethanol in a one-pot process, although the two reactions conducted in aqueous media are not compatible due to enzyme deactivation by Cu ions. The one-pot feasibility was achieved via compartmentalization of the reactions. Conducting the Wacker oxidation in the interior of a polydimethylsiloxane thimble enables diffusion of only the organic substrate and product into the exterior where the biotransformation takes place. Thus, the Cu ions detrimental to the enzyme are withheld from the reaction media of the biotransformation. In this one-pot process, which formally corresponds to an asymmetric hydration of alkenes, a range of 1-arylethanols were formed with high conversions and 98-99 % ee. In addition, the catalyst system of the Wacker oxidation was recycled 15 times without significant decrease in conversion.

  16. Preparation and use of media for protease-producing bacterial strains based on by-products from Cuttlefish (Sepia officinalis) and wastewaters from marine-products processing factories.

    PubMed

    Souissi, Nabil; Ellouz-Triki, Yosra; Bougatef, Ali; Blibech, Monia; Nasri, Moncef

    2008-01-01

    Cuttlefish powder (CFP) from Sepia officinalis by-products was prepared and tested as a fermentation substrate for microbial growth and protease production by several species of bacteria: Bacillus licheniformis, Bacillus subtilis, Pseudomonas aeruginosa, Bacillus cereus BG1, and Vibrio parahaemolyticus. All microorganisms studied grew well and produced protease activity when cultivated in medium containing only CFP indicating that the strains can obtain their carbon and nitrogen source requirements directly from whole by-product proteins. Moreover, it was found that the addition to the cuttlefish medium of diluted fishery wastewaters (FWW), generated by marine-products processing factories, enhanced the production of protease. Maximum activity was obtained when cells were grown in cuttlefish media containing 5-times or 10-times diluted FWW. Five-times diluted FWW enhanced protease production by B. cereus BG1 and B. subtilis by 467% and 75% more than control media, respectively. The enhancement could have been due to the high organic content or high salts in FWW. As a result, cuttlefish by-products powder enriched with diluted FWW was found to be a suitable growth media for protease-producing strains. This new process, which converts underutilized wastes (liquid and solid) into more marketable and acceptable forms, coupled with protease production, can be an alternative way to the biological treatment of solid and liquid wastes generated by the cuttlefish processing industry.

  17. Choosing Training Delivery Media.

    ERIC Educational Resources Information Center

    Hybert, Peter R.

    2000-01-01

    Focuses on decisionmaking about delivery media, and introduces CADDI's Performance-based, Accelerated, Customer-Stakeholder-driven Training & Development(SM) (PACT) Processes for training and development (T&D). Describes the media decisions that correspond with the design three levels of PACT: Curriculum Architecture Design, Modular Curriculum…

  18. The developmental effects of media-ideal internalization and self-objectification processes on adolescents' negative body-feelings, dietary restraint, and binge eating.

    PubMed

    Dakanalis, Antonios; Carrà, Giuseppe; Calogero, Rachel; Fida, Roberta; Clerici, Massimo; Zanetti, Maria Assunta; Riva, Giuseppe

    2015-08-01

    Despite accumulated experimental evidence of the negative effects of exposure to media-idealized images, the degree to which body image, and eating related disturbances are caused by media portrayals of gendered beauty ideals remains controversial. On the basis of the most up-to-date meta-analysis of experimental studies indicating that media-idealized images have the most harmful and substantial impact on vulnerable individuals regardless of gender (i.e., "internalizers" and "self-objectifiers"), the current longitudinal study examined the direct and mediated links posited in objectification theory among media-ideal internalization, self-objectification, shame and anxiety surrounding the body and appearance, dietary restraint, and binge eating. Data collected from 685 adolescents aged between 14 and 15 at baseline (47 % males), who were interviewed and completed standardized measures annually over a 3-year period, were analyzed using a structural equation modeling approach. Results indicated that media-ideal internalization predicted later thinking and scrutinizing of one's body from an external observer's standpoint (or self-objectification), which then predicted later negative emotional experiences related to one's body and appearance. In turn, these negative emotional experiences predicted subsequent dietary restraint and binge eating, and each of these core features of eating disorders influenced each other. Differences in the strength of these associations across gender were not observed, and all indirect effects were significant. The study provides valuable information about how the cultural values embodied by gendered beauty ideals negatively influence adolescents' feelings, thoughts and behaviors regarding their own body, and on the complex processes involved in disordered eating. Practical implications are discussed.

  19. Using new media to build social capital for health: a qualitative process evaluation study of participation in the CityNet project.

    PubMed

    Bolam, Bruce; McLean, Carl; Pennington, Andrew; Gillies, Pamela

    2006-03-01

    The present article presents an exploratory qualitative process evaluation study of 'Ambassador' participation in CityNet, an innovative information-communication technology-based (ICT) project that aims to build aspects of social capital and improve access to information and services among disadvantaged groups in Nottingham, UK. A purposive sample of 40 'Ambassadors' interviewees was gathered in three waves of data collection. The two emergent analytic themes highlighted how improvements in confidence, self-esteem and social networks produced via participation were mitigated by structural problems in devolving power within the project. This illustrates how concepts of power are important for understanding the process of health promotion interventions using new media.

  20. The role of mass media in adolescents' sexual behaviors: exploring the explanatory value of the three-step self-objectification process.

    PubMed

    Vandenbosch, Laura; Eggermont, Steven

    2015-04-01

    This longitudinal study (N = 730) explored whether the three-step process of self-objectification (internalization of appearance ideals, valuing appearance over competence, and body surveillance) could explain the influence of sexual media messages on adolescents' sexual behaviors. A structural equation model showed that reading sexualizing magazines (Time 1) was related to the internalization of appearance ideals and valuing appearance over competence (Time 2). In turn, the internalization of appearance ideals was positively associated with body surveillance and valuing appearance over competence (all at Time 2). Valuing appearance over competence was also positively associated with body surveillance (all at Time 2). Lastly, body surveillance (Time 2) positively related to the initiation of French kissing (Time 3) whereas valuing appearance over competence (Time 2) positively related to the initiation of sexual intercourse (Time 3). No significant relationship was observed for intimate touching. The discussion focused on the explanatory role of self-objectification in media effects on adolescents' sexual behaviors.

  1. Media, Gadgets.

    ERIC Educational Resources Information Center

    Journal of Chemical Education, 1981

    1981-01-01

    Summarizes papers presented at the Sixth Biennial Conference on Chemical Education describing new media and gadgets, particularly models, computers, and other media. A bibliography of 15 presented papers on these topics is attached. (CS)

  2. Media violence.

    PubMed

    Strasburger, V C

    1999-01-01

    For decades, media violence has been viewed as largely a Western problem. New studies indicate that Indian children have increasing access to the media and that media violence will subject them to the same problems as Western children: imitation, desensitization, fear, and inappropriate attitudes about violence and aggression. Solutions exist but will have to be implemented within the next decade to protect Indian children and adolescents from the harmful effects of media violence.

  3. Media multitasking in adolescence.

    PubMed

    Cain, Matthew S; Leonard, Julia A; Gabrieli, John D E; Finn, Amy S

    2016-12-01

    Media use has been on the rise in adolescents overall, and in particular, the amount of media multitasking-multiple media consumed simultaneously, such as having a text message conversation while watching TV-has been increasing. In adults, heavy media multitasking has been linked with poorer performance on a number of laboratory measures of cognition, but no relationship has yet been established between media-multitasking behavior and real-world outcomes. Examining individual differences across a group of adolescents, we found that more frequent media multitasking in daily life was associated with poorer performance on statewide standardized achievement tests of math and English in the classroom, poorer performance on behavioral measures of executive function (working memory capacity) in the laboratory, and traits of greater impulsivity and lesser growth mindset. Greater media multitasking had a relatively circumscribed set of associations, and was not related to behavioral measures of cognitive processing speed, implicit learning, or manual dexterity, or to traits of grit and conscientiousness. Thus, individual differences in adolescent media multitasking were related to specific differences in executive function and in performance on real-world academic achievement measures: More media multitasking was associated with poorer executive function ability, worse academic achievement, and a reduced growth mindset.

  4. New Media.

    ERIC Educational Resources Information Center

    Downtown Business Quarterly, 1998

    1998-01-01

    This theme issue explores lower Manhattan's burgeoning "New Media" industry, a growing source of jobs in lower Manhattan. The first article, "New Media Manpower Issues" (Rodney Alexander), addresses manpower, training, and workforce demands faced by new media companies in New York City. The second article, "Case Study:…

  5. Media Panel.

    ERIC Educational Resources Information Center

    Marklund, Inger, Ed.; Hanse, Mona-Britt, Ed.

    1984-01-01

    The Swedish Media Panel is a research program about children and young persons and their use of mass media. The aim of the ten-year (1975-1985) project is to explain how media habits originate, how they change as children grow older, what factors on the part of children themselves and in their surroundings may be connected with a certain use of…

  6. Social Media

    DTIC Science & Technology

    2010-05-01

    4 Table 2: Traditional Media Usage (% of consumers ...media can be described in terms of content authors and passive consumers . Traditional media sources have dominated the landscape of news distribution...delivering software as a continually-updated service that gets better the more people use it, consuming and remixing data from multiple sources

  7. Acceleration of split-field finite difference time-domain method for anisotropic media by means of graphics processing unit computing

    NASA Astrophysics Data System (ADS)

    Francés, Jorge; Bleda, Sergio; Álvarez, Mariela Lázara; Martínez, Francisco Javier; Márquez, Andres; Neipp, Cristian; Beléndez, Augusto

    2014-01-01

    The implementation of split-field finite difference time domain (SF-FDTD) applied to light-wave propagation through periodic media with arbitrary anisotropy method in graphics processing units (GPUs) is described. The SF-FDTD technique and the periodic boundary condition allow the consideration of a single period of the structure reducing the simulation grid. Nevertheless, the analysis of the anisotropic media implies considering all the electromagnetic field components and the use of complex notation. These aspects reduce the computational efficiency of the numerical method compared with the isotropic and nonperiodic implementation. Specifically, the implementation of the SF-FDTD in the Kepler family of GPUs of NVIDIA is presented. An analysis of the performance of this implementation is done, and several applications have been considered in order to estimate the possibilities provided by both the formalism and the implementation into GPU: binary phase gratings and twisted-nematic liquid crystal cells. Regarding the analysis of binary phase gratings, the validity of the scalar diffraction theory is evaluated by the comparison of the diffraction efficiencies predicted by SF-FDTD. The analysis for the second order of diffraction is extended, which is considered as a reference for the transmittance obtained by the SF-FDTD scheme for periodic media.

  8. Efficiently engineering pore-scale processes: The role of force dominance and topology during nonwetting phase trapping in porous media

    NASA Astrophysics Data System (ADS)

    Herring, Anna L.; Andersson, Linnéa; Schlüter, Steffen; Sheppard, Adrian; Wildenschild, Dorthe

    2015-05-01

    We investigate trapping of a nonwetting (NW) phase, air, within Bentheimer sandstone cores during drainage-imbibition flow experiments, as quantified on a three dimensional (3D) pore-scale basis via x-ray computed microtomography (X-ray CMT). The wetting (W) fluid in these experiments was deionized water doped with potassium iodide (1:6 by weight). We interpret these experiments based on the capillary-viscosity-gravity force dominance exhibited by the Bentheimer-air-brine system and compare to a wide range of previous drainage-imbibition experiments in different media and with different fluids. From this analysis, we conclude that viscous and capillary forces dominate in the Bentheimer-air-brine system as well as in the Bentheimer-supercritical CO2-brine system. In addition, we further develop the relationship between initial (post-drainage) NW phase connectivity and residual (post-imbibition) trapped NW phase saturation, while also taking into account initial NW phase saturation and imbibition capillary number. We quantify NW phase connectivity via a topological measure as well as by a statistical percolation metric. These metrics are evaluated for their utility and appropriateness in quantifying NW phase connectivity within porous media. Here, we find that there is a linear relationship between initial NW phase connectivity (as quantified by the normalized Euler number, χ ˆ) and capillary trapping efficiency; for a given imbibition capillary number, capillary trapping efficiency (residual NW phase saturation normalized by initial NW phase saturation) can decrease by up to 60% as initial NW phase connectivity increases from low connectivity (χ ˆ ≈ 0) to very high connectivity (χ ˆ ≈ 1). We propose that multiphase fluid-porous medium systems can be efficiently engineered to achieve a desired residual state (optimal NW phase saturation) by considering the dominant forces at play in the system along with the impacts of NW phase topology within the porous

  9. Efficient fabrication of high-capacity immobilized metal ion affinity chromatographic media: The role of the dextran-grafting process and its manipulation.

    PubMed

    Zhao, Lan; Zhang, Jingfei; Huang, Yongdong; Li, Qiang; Zhang, Rongyue; Zhu, Kai; Suo, Jia; Su, Zhiguo; Zhang, Zhigang; Ma, Guanghui

    2016-03-01

    Novel high-capacity Ni(2+) immobilized metal ion affinity chromatographic media were prepared through the dextran-grafting process. Dextran was grafted to an allyl-activated agarose-based matrix followed by functionalization for the immobilized metal ion affinity chromatographic media. With elaborate regulation of the allylation degree, dextran was completely or partly grafted to agarose microspheres, namely, completely dextran-grafted agarose microspheres and partly dextran-grafted ones, respectively. Confocal laser scanning microscope results demonstrated that a good adjustment of dextran-grafting degree was achieved, and dextran was distributed uniformly in whole completely dextran-grafted microspheres, while just distributed around the outside of the partly dextran-grafted ones. Flow hydrodynamic properties were improved greatly after the dextran-grafting process, and the flow velocity increased by about 30% compared with that of a commercial chromatographic medium (Ni Sepharose FF). A significant improvement of protein binding performance was also achieved by the dextran-grafting process, and partly dextran-grafted Ni(2+) chelating medium had a maximum binding capacity for His-tagged lactate dehydrogenase about 2.5 times higher than that of Ni Sepharose FF. The results indicated that this novel chromatographic medium is promising for applications in high-efficiency and large-scale protein purification.

  10. A review on advanced oxidation processes for the removal of taste and odor compounds from aqueous media.

    PubMed

    Antonopoulou, M; Evgenidou, E; Lambropoulou, D; Konstantinou, I

    2014-04-15

    In view of the global concern about the occurrence of taste and odor (T&O) compounds in waters for drinking water supply and the necessity for the development of more innovative and efficient technologies for water treatment and depuration, the focus of this study is to provide a state of the art overview on current knowledge for the application of advanced oxidation technologies for the treatment of T&O compounds in aquatic media. The most representative and newly emerging compounds belonging to the major groups of T&O compounds, such as geosmin, methylisoborneol, benzothiazoles, mercaptans and sulfides as well as aromatic and other miscellaneous T&O compounds, are included in the systematic overview. The current data has been compiled and extensively discussed in terms of the degree of degradation, reaction kinetics, effect of operational parameters and water quality, identity of intermediate and final products and possible transformation pathways.

  11. The influence of the Goos-Hänchen effect on seismic data processing and AVO in attenuating media

    NASA Astrophysics Data System (ADS)

    Wang, Zhiyong

    2015-11-01

    The Goos-Hänchen (GH) effect induced by the total reflection of an incident beam of P-wave from a low-impedance medium to a high-impedance medium at near- and post-critical angles was theoretically simulated and discussed. For both PP- and PSV-waves, there may be large GH shifts (GHS) and penetration depths (PD) for both lossless and attenuating media. As the Q-factor increases, or the frequency of the seismic wave decreases, the GH effect is increased. However, in attenuating media, there may be non-zero GHS and PD at all non-zero incident angles, not just post-critical angles. GHS may be either positive or negative, while PD is positive only. Compared to the Q-factor in the incident medium, the Q-factor in the transmission medium may play a more dominant role in the determination of reflection coefficients, GHS, and PD. The GH-induced normal moveout (NMO) discrepancy of the PSV-wave may be larger than that of the PP-wave. Due to the GH effect, there may be an angle discrepancy (at fixed offset) between the GH-modified incident angle and the traditional incident angle. In addition, the GH effect at a given offset may produce two or three reflected waves, from different incident angles. These results suggest that, within their assumptions, the GH effect may lead to errors in NMO estimates and the vertical location of the reflector. Furthermore, there may be errors in offsets, incident angles, and reflection amplitudes, in the analyses of the amplitude variation with offset (AVO). These GH effects might be more important for seismic data at fixed offsets and shallow layers, and for sonic log data, which might fall into the post-critical angle regime. Therefore, there may be a necessity to take into account the GH effect in the interpretation of wide-angle reflection data in NMO and AVO analyses.

  12. OpenGeoSys: an open-source initiative for numerical simulation of thermo-hydro-mechanical/chemical (THM/C) processes in porous media

    NASA Astrophysics Data System (ADS)

    Kolditz, O.

    2013-12-01

    In this paper we describe the OpenGeoSys (OGS) project, which is a scientific open-source initiative for numerical simulation of thermo-hydro-mechanical/chemical processes in porous media. The basic concept is to provide a flexible numerical framework (using primarily the Finite Element Method (FEM)) for solving multifield problems in porous and fractured media for applications in geoscience and hydrology. To this purpose OGS is based on an object-oriented FEM concept including a broad spectrum of interfaces for pre- and postprocessing. The OGS idea has been in development since the mid-eighties; meanwhile we are working on its 6th version. We provide a short historical note about the continuous process of concept and software development having evolved through Fortran, C, and C++ implementations. The idea behind OGS is to provide an open platform to the community, outfitted with professional software-engineering tools such as platform-independent compiling and automated benchmarking. A comprehensive benchmarking book has been prepared for publication. Benchmarking has been proven to be a valuable tool for cooperation between different developer teams, for example, for code comparison and validation purposes (DEVOVALEX, CO2BENCH and SSBENCH projects). On one hand, object-orientation (OO) provides a suitable framework for distributed code development; however, the parallelization of OO codes still lacks efficiency. High-performance-computing efficiency of OO codes is subject to future research (accompanying poster).

  13. Mixed Media

    ERIC Educational Resources Information Center

    Peterson, Erin

    2010-01-01

    While institutions do not often have a hook as compelling as an eagerly awaited movie, great content is critical for media relations success--and coupling it with the right distribution channel can ensure the story finds the right audience. Even better, retooling it for several media platforms can extend the life and reach of a story. The changes…

  14. Earned Media

    ERIC Educational Resources Information Center

    Sunshine, Alice

    2011-01-01

    "Earned media" is exactly what one thinks it is. The people who do the necessary work to earn coverage of their issue or battle are the ones who will get their story out to the public. Earning media coverage involves giving careful attention to the mechanics of reaching out to news outlets. Most people can learn the mechanics through…

  15. Event-centric media management

    NASA Astrophysics Data System (ADS)

    Scherp, Ansgar; Agaram, Srikanth; Jain, Ramesh

    2008-01-01

    The management of the vast amount of media assets captured at every day events such as meetings, birthday parties, vacation, and conferences has become an increasingly challenging problem. Today, most media management applications are media-centric. This means, they put the captured media assets into the center of the management. However, in recent years it has been proposed that events are a much better abstraction of human experience and thus provide a more appropriate means for managing media assets. Consequently, approaches that include events into their media management solution have been explored. However, they typically consider events only as some more metadata that can be extracted from the media assets. In addition, today's applications and approaches concentrate on particular problems such as event detection, tagging, sharing, classification, or clustering and are often focused on a single media type. In this paper, we argue for the benefits of an event-centric media management (EMMa) approach that looks at the problem of media management holistically. Based on a generic event model, we specify a media event model for the EMMa approach. The single phases and processes of the EMMa approach are defined in a general process chain for an event-centric media management, the EMMa cycle. This cycle follows the event concept throughout all phases and processes of the chain and puts the concept of events in the center of the media management. Based on the media event model and EMMa cycle, we design a component-based architecture for the EMMa approach and conduct an implementation of the approach.

  16. Processes, mechanisms, parameters, and modeling approaches for partially saturated flow in soil and rock media; Yucca Mountain Site Characterization Project

    SciTech Connect

    Wang, J.S.Y.; Narasimhan, T.N.

    1993-06-01

    This report discusses conceptual models and mathematical equations, analyzes distributions and correlations among hydrological parameters of soils and tuff, introduces new path integration approaches, and outlines scaling procedures to model potential-driven fluid flow in heterogeneous media. To properly model the transition from fracture-dominated flow under saturated conditions to matrix-dominated flow under partially saturated conditions, characteristic curves and permeability functions for fractures and matrix need to be improved and validated. Couplings from two-phase flow, heat transfer, solute transport, and rock deformation to liquid flow are also important. For stochastic modeling of alternating units of welded and nonwelded tuff or formations bounded by fault zones, correlations and constraints on average values of saturated permeability and air entry scaling factor between different units need to be imposed to avoid unlikely combinations of parameters and predictions. Large-scale simulations require efficient and verifiable numerical algorithms. New path integration approaches based on postulates of minimum work and mass conservation to solve flow geometry and potential distribution simultaneously are introduced. This verifiable integral approach, together with fractal scaling procedures to generate statistical realizations with parameter distribution, correlation, and scaling taken into account, can be used to quantify uncertainties and generate the cumulative distribution function for groundwater travel times.

  17. Connecting the molecular scale to the continuum scale for diffusion processes in smectite-rich porous media

    SciTech Connect

    Bourg, I.C.; Sposito, G.

    2009-12-01

    In this paper, we address the manner in which the continuum-scale diffusive properties of smectite-rich porous media arise from their molecular- and pore-scale features. Our starting point is a successful model of the continuum-scale apparent diffusion coefficient for water tracers and cations which decomposes it as a sum of pore-scale terms describing diffusion in macropore and interlayer 'compartments.' We then apply molecular dynamics (MD) simulations to determine molecular-scale diffusion coefficients D{sub interlayer} of water tracers and representative cations (Na{sup +}, Cs{sup +}, Sr{sup 2+}) in Na-smectite interlayers. We find that a remarkably simple expression relates D{sub interlayer} to the pore-scale parameter {delta}{sub nanopore} {<=} 1, a constrictivity factor that accounts for the lower mobility in interlayers as compared to macropores: {delta}{sub nanopore} = D{sub interlayer}/D{sub 0}, where D{sub 0} is the diffusion coefficient in bulk liquid water. Using this scaling expression, we can accurately predict the apparent diffusion coefficients of tracer H{sub 2}O, Na{sup +}, Sr{sup 2+} and Cs{sup +}+ in compacted Na-smectite-rich materials.

  18. Surface characterization and in vivo evaluation of laser sintered and machined implants followed by resorbable-blasting media process: A study in sheep

    PubMed Central

    Bowers, Michelle; Yoo, Daniel; Marin, Charles; Gil, Luiz; Shabaka, Nour; Goldstein, Matt; Janal, Malvin; Tovar, Nick; Bonfante, Estevam; Coelho, Paulo

    2016-01-01

    Background This study aimed to compare the histomorphometric and histological bone response to laser-sintered implants followed by resorbable-blasting media (RBM) process relative to standard machined/RBM surface treated implants. Material and Methods Six male sheep (n=6) received 2 Ti-6Al-4V implants (1 per surface) in each side of the mandible for 6 weeks in vivo. The histomorphometric parameters bone-implant contact (BIC) and bone area fraction occupancy (BAFO) were evaluated. Results Optical interferometry revealed higher Sa and Sq values for the laser-sintered/RBM surface in relation to standard/RBM implants. No significant differences in BIC were observed between the two groups (p>0.2), but significantly higher BAFO was observed for standard/RBM implants (p<0.01). Conclusions The present study demonstrated that both surfaces were biocompatible and osseoconductive, and the combination of laser sintering and RBM has no advantage over the standard machined implants with subsequent RBM. Key words:Dental implants, osseointegration, resorbable- blasting media, sheep, in vivo. PMID:26827064

  19. Media Publics and Media Trust.

    ERIC Educational Resources Information Center

    Gaziano, Cecilie; McGrath, Kristin

    To gain a perspective on the kinds of people who find newspapers and television to be high or low in credibility, a two-phase study combined demographic and other characteristics, media behavior, and attitudes toward the media. The first phase involved a series of focused group discussions, while the second was a national, representative sampling…

  20. Media violence.

    PubMed

    Cantor, J

    2000-08-01

    Research on the effects of media violence is not well understood by the general public. Despite this fact, there is an overwhelming consensus in the scientific literature about the unhealthy effects of media violence. Meta-analyses show that media-violence viewing consistently is associated with higher levels of antisocial behavior, ranging from the trivial (imitative violence directed against toys) to the serious (criminal violence), with many consequential outcomes in between (acceptance of violence as a solution to problems, increased feelings of hostility, and the apparent delivery of painful stimulation to another person). Desensitization is another well-documented effect of viewing violence, which is observable in reduced arousal and emotional disturbance while witnessing violence, the reduced tendency to intervene in a fight, and less sympathy for the victims of violence. Although there is evidence that youth who are already violent are more likely to seek out violent entertainment, there is strong evidence that the relationship between violence viewing and antisocial behavior is bidirectional. There is growing evidence that media violence also engenders intense fear in children which often lasts days, months, and even years. The media's potential role in solutions to these problems is only beginning to be explored, in investigations examining the uses and effects of movie ratings, television ratings, and the V-chip, and the effects of media literacy programs and public education efforts. Future research should explore important individual differences in responses to media violence and effective ways to intervene in the negative effects.

  1. The Emerging Neuroscience of Social Media.

    PubMed

    Meshi, Dar; Tamir, Diana I; Heekeren, Hauke R

    2015-12-01

    Social media use is a global phenomenon, with almost two billion people worldwide regularly using these websites. As Internet access around the world increases, so will the number of social media users. Neuroscientists can capitalize on the ubiquity of social media use to gain novel insights about social cognitive processes and the neural systems that support them. This review outlines social motives that drive people to use social media, proposes neural systems supporting social media use, and describes approaches neuroscientists can use to conduct research with social media. We close by noting important directions and ethical considerations of future research with social media.

  2. Media violence.

    PubMed

    Willis, E; Strasburger, V C

    1998-04-01

    American media are the most violent in the world, and American society is now paying a high price in terms of real life violence. Research has confirmed that mass media violence contributes to aggressive behavior, fear, and desensitization of violence. Television, movies, music videos, computer/video games are pervasive media and represent important influences on children and adolescents. Portraying rewards and punishments and showing the consequences of violence are probably the two most essential contextual factors for viewers as they interpret the meaning of what they are viewing on television. Public health efforts have emphasized public education, media literacy campaign for children and parents, and an increased use of technology to prevent access to certain harmful medial materials.

  3. Heat as a tracer for understanding transport processes in fractured media: Theory and field assessment from multiscale thermal push-pull tracer tests

    NASA Astrophysics Data System (ADS)

    Klepikova, Maria V.; Le Borgne, Tanguy; Bour, Olivier; Dentz, Marco; Hochreutener, Rebecca; Lavenant, Nicolas

    2016-07-01

    The characterization and modeling of heat transfer in fractured media is particularly challenging as the existence of fractures at multiple scales induces highly localized flow patterns. From a theoretical and numerical analysis of heat transfer in simple conceptual models of fractured media, we show that flow channeling has a significant effect on the scaling of heat recovery in both space and time. The late time tailing of heat recovery under channeled flow is shown to diverge from the T>(t>)∝t-1.5 behavior expected for the classical parallel plate model and follow the scaling T>(t>)∝1/t>(log⁡t>)2 for a simple channel modeled as a tube. This scaling, which differs significantly from known scalings in mobile-immobile systems, is of purely geometrical origin: late time heat transfer from the matrix to a channel corresponds dimensionally to a radial diffusion process, while heat transfer from the matrix to a plate may be considered as a one-dimensional process. This phenomenon is also manifested on the spatial scaling of heat recovery as flow channeling affects the decay of the thermal breakthrough peak amplitude and the increase of the peak time with scale. These findings are supported by the results of a field experimental campaign performed on the fractured rock site of Ploemeur. The scaling of heat recovery in time and space, measured from thermal breakthrough curves measured through a series of push-pull tests at different scales, shows a clear signature of flow channeling. The whole data set can thus be successfully represented by a multichannel model parametrized by the mean channel density and aperture. These findings, which bring new insights on the effect of flow channeling on heat transfer in fractured rocks, show how heat recovery in geothermal tests may be controlled by fracture geometry. In addition, this highlights the interest of thermal push-pull tests as a complement to solute tracers tests to infer fracture aperture and geometry.

  4. From Augmentation Media to Meme Media.

    ERIC Educational Resources Information Center

    Tanaka, Yuzuru

    Computers as meta media are now evolving from augmentation media vehicles to meme media vehicles. While an augmentation media system provides a seamlessly integrated environment of various tools and documents, meme media system provides further functions to edit and distribute tools and documents. Documents and tools on meme media can easily…

  5. APPLICATION OF A LUMPED-PROCESS MATHEMATICAL MODEL TO DISSOLUTION OF NON-UNIFORMLY DISTRIBUTED IMMISCIBLE LIQUID IN HETEROGENEOUS POROUS MEDIA

    PubMed Central

    Marble, J. C.; DiFilippo, E. L.; Zhang, Z.; Tick, G. R.; Brusseau, M. L.

    2010-01-01

    The use of a lumped-process mathematical model to simulate the complete dissolution of immiscible liquid non-uniformly distributed in physically heterogeneous porous-media systems was investigated. The study focused specifically on systems wherein immiscible liquid was poorly accessible to flowing water. Two representative, idealized scenarios were examined, one wherein immiscible liquid at residual saturation exists within a lower-permeability unit residing in a higher-permeability matrix, and one wherein immiscible liquid at higher saturation (a pool) exists within a higher-permeability unit adjacent to a lower-permeability unit. As expected, effluent concentrations were significantly less than aqueous solubility due to dilution and by-pass flow effects. The measured data were simulated with two mathematical models, one based on a simple description of the system and one based on a more complex description. The permeability field and the distribution of the immiscible-liquid zones were represented explicitly in the more complex, distributed-process model. The dissolution rate coefficient in this case represents only the impact of local-scale (and smaller) processes on dissolution, and the parameter values were accordingly obtained from the results of experiments conducted with one-dimensional, homogeneously-packed columns. In contrast, the system was conceptualized as a pseudo-homogeneous medium with immiscible liquid uniformly distributed throughout the system for the simpler, lumped-process model. With this approach, all factors that influence immiscible-liquid dissolution are incorporated into the calibrated dissolution rate coefficient, which in such cases serves as a composite or lumped term. The calibrated dissolution rate coefficients obtained from the simulations conducted with the lumped-process model were approximately two to three orders of magnitude smaller than the independently-determined values used for the simulations conducted with the

  6. A Subcultural Account of Media Effects

    ERIC Educational Resources Information Center

    Howitt, Dennis; Dembo, Richard

    1974-01-01

    A critical review and analysis of the literature on the effects--aggressive drive, behavior or attitude--of mass media violence, suggesting that the processes of media influence are more subtle than traditional effects formulations imply. (Author/SF)

  7. Combining MMOWGLI Social Media Brainstorming with Lexical Link Analysis (LLA) to Strengthen the DoD Acquisition Process

    DTIC Science & Technology

    2013-09-30

    founded Quantum Intelligence, Inc. She was principal investigator (PI) for six contracts awarded by the DoD Small Business Innovation Research (SBIR... Quantum Intelligence, Inc. CLA is a computer-based learning agent, or agent collaboration, capable of ingesting and processing data sources. We have...opportunities all need to be addressed consciously and consistently.  Following a series of deliberate experiments, long-term procedural improvements to the

  8. Estimation of fundamental kinetic parameters of polyhydroxybutyrate fermentation process of Azohydromonas australica using statistical approach of media optimization.

    PubMed

    Gahlawat, Geeta; Srivastava, Ashok K

    2012-11-01

    Polyhydroxybutyrate or PHB is a biodegradable and biocompatible thermoplastic with many interesting applications in medicine, food packaging, and tissue engineering materials. The present study deals with the enhanced production of PHB by Azohydromonas australica using sucrose and the estimation of fundamental kinetic parameters of PHB fermentation process. The preliminary culture growth inhibition studies were followed by statistical optimization of medium recipe using response surface methodology to increase the PHB production. Later on batch cultivation in a 7-L bioreactor was attempted using optimum concentration of medium components (process variables) obtained from statistical design to identify the batch growth and product kinetics parameters of PHB fermentation. A. australica exhibited a maximum biomass and PHB concentration of 8.71 and 6.24 g/L, respectively in bioreactor with an overall PHB production rate of 0.75 g/h. Bioreactor cultivation studies demonstrated that the specific biomass and PHB yield on sucrose was 0.37 and 0.29 g/g, respectively. The kinetic parameters obtained in the present investigation would be used in the development of a batch kinetic mathematical model for PHB production which will serve as launching pad for further process optimization studies, e.g., design of several bioreactor cultivation strategies to further enhance the biopolymer production.

  9. Chemical Engineering Division fuel cycle programs. Quarterly progress report, April-June 1979. [Pyrochemical/dry processing; waste encapsulation in metal; transport in geologic media

    SciTech Connect

    Steindler, M.J.; Ader, M.; Barletta, R.E.

    1980-09-01

    For pyrochemical and dry processing materials development included exposure to molten metal and salt of Mo-0.5% Ti-0.07% Ti-0.01% C, Mo-30% W, SiC, Si/sub 2/ON/sub 2/, ZrB/sub 2/-SiC, MgAl/sub 2/O/sub 4/, Al/sub 2/O/sub 3/, AlN, HfB/sub 2/, Y/sub 2/O/sub 3/, BeO, Si/sub 3/N/sub 4/, nickel nitrate-infiltrated W, W-coated Mo, and W-metallized alumina-yttria. Work on Th-U salt transport processing included solubility of Th in liquid Cd, defining the Cd-Th and Cd-Mg-Th phase diagrams, ThO/sub 2/ reduction experiments, and electrolysis of CaO in molten salt. Work on pyrochemical processes and associated hardware for coprocessing U and Pu in spent FBR fuels included a second-generation computer model of the transport process, turntable transport process design, work on the U-Cu-Mg system, and U and Pu distribution coefficients between molten salt and metal. Refractory metal vessels are being service-life tested. The chloride volatility processing of Th-based fuel was evaluated for its proliferation resistance, and a preliminary ternary phase diagram for the Zn-U-Pu system was computed. Material characterization and process analysis were conducted on the Exportable Pyrochemical process (Pyro-Civex process). Literature data on oxidation of fissile metals to oxides were reviewed. Work was done on chemical bases for the reprocessing of actinide oxides in molten salts. Flowsheets are being developed for the processing of fuel in molten tin. Work on encapsulation of solidified radioactive waste in metal matrix included studies of leach rate of crystalline waste materials and of the impact resistance of metal-matrix waste forms. In work on the transport properties of nuclear waste in geologic media, adsorption of Sr on oolitic limestone was studied, as well as the migration of Cs in basalt. Fitting of data on the adsorption of iodate by hematite to a mathematical model was attempted.

  10. Impact of process parameters on the breakage kinetics of poorly water-soluble drugs during wet stirred media milling: a microhydrodynamic view.

    PubMed

    Afolabi, Afolawemi; Akinlabi, Olakemi; Bilgili, Ecevit

    2014-01-23

    Wet stirred media milling has proven to be a robust process for producing nanoparticle suspensions of poorly water-soluble drugs. As the process is expensive and energy-intensive, it is important to study the breakage kinetics, which determines the cycle time and production rate for a desired fineness. Although the impact of process parameters on the properties of final product suspensions has been investigated, scant information is available regarding their impact on the breakage kinetics. Here, we elucidate the impact of stirrer speed, bead concentration, and drug loading on the breakage kinetics via a microhydrodynamic model for the bead-bead collisions. Suspensions of griseofulvin, a model poorly water-soluble drug, were prepared in the presence of two stabilizers: hydroxypropyl cellulose and sodium dodecyl sulfate. Laser diffraction, scanning electron microscopy, and rheometry were used to characterize them. Various microhydrodynamic parameters including a newly defined milling intensity factor was calculated. An increase in either the stirrer speed or the bead concentration led to an increase in the specific energy and the milling intensity factor, consequently faster breakage. On the other hand, an increase in the drug loading led to a decrease in these parameters and consequently slower breakage. While all microhydrodynamic parameters provided significant physical insight, only the milling intensity factor was capable of explaining the influence of all parameters directly through its strong correlation with the process time constant. Besides guiding process optimization, the analysis rationalizes the preparation of a single high drug-loaded batch (20% or higher) instead of multiple dilute batches.

  11. [Value of the technique of intravenous infusion of contrast media for the diagnosis of fluid processes (author's transl)].

    PubMed

    Ramos, L; Marcos, L; Arenas de Pablo, A; Mora, M H; Illanas, M; Paya, F P; Picouto, P P

    1977-01-01

    The study covered 50 patients suffering from hepatic effusions; a solution used in contrast intravenous psychography was administered to them by the intravenous route, at similar doses to those used in intravenous psychography with infusions. This process which we have called Intravenous Viscerogramme, because of the similarity of the images obtained with those of the viscerographic phase of arteriography, has enabled the diagnosis of 35 hydatidiform cysts, one case of cholangiolar hamartoma and an abscess. Owing to the ease with which it can be carried out, we think that it can be used in the diagnosis of tumoral lesions of the liver. When the result is positive, radiological signs are obtained which enable identification of the lesion, thus avoiding resorting to more complex investigations such as angiography.

  12. Optimization of formulation and process parameters for the production of nanosuspension by wet media milling technique: effect of Vitamin E TPGS and nanocrystal particle size on oral absorption.

    PubMed

    Ghosh, Indrajit; Schenck, Daniel; Bose, Sonali; Ruegger, Colleen

    2012-11-20

    The purpose of this study was to develop nanosuspension formulations of a poorly soluble drug using a wet media milling technique. The milling process was optimized by studying the effects of critical process parameters on the size of nanoparticles using a factorial design approach. During the design of experiments (DOEs) study, different concentrations of Vitamin E TPGS in the suspensions were used to evaluate its influence on the stabilization of a nanosuspension. Once the final formulation was optimized, a pharmacokinetic study was performed in beagle dogs to investigate the effect of different ranges of particle size of nanocrystals on the plasma profile. A significant increase in AUC and C(max) was observed when the drug substance was converted into nanocrystals, likely due to the increase in dissolution rate. Results also revealed that the nanosuspension formulation (consists of nanocrystals with narrow size distribution, having a mean particle size<300 nm) produced less variability with regards to the individual plasma concentrations in the dogs when compared an alternate nanocrystal formulation (consists of nanocrystals with broad size distribution having a mean particle size<750 nm). This type of observation can be explained due to the Ostwald ripening phenomena between the nanocrystals when the particle size distribution was very broad (higher poly dispersity index). Surprisingly, the un-micronized suspension containing Vitamin E TPGS did not show any significant impact on pharmacokinetic parameters.

  13. A wetting experiment as a tool to study the physicochemical processes accompanying the contact of hydrophobic and superhydrophobic materials with aqueous media.

    PubMed

    Boinovich, Ludmila; Emelyanenko, Alexandre

    2012-11-01

    In most fields of technological application of superhydrophobic materials, such as protection against corrosion, icing, and capillary condensation, or micro fluidics applications, a superhydrophobic surface has to operate in contact with aggressive aqueous media. Therefore, the peculiarities of behaviour of hydrophobic and superhydrophobic surfaces on prolonged contact with water and the mechanisms of possible degradation of superhydrophobicity need to be discussed. In this study, a consideration of the physicochemical processes accompanying the contact of hydrophobic and superhydrophobic materials with water, acid, alkaline and saline aqueous solutions is presented on the basis of experimental data on three-phase equilibrium obtained by the sessile drop method. It is shown that simultaneous analysis of the contact angle and contact diameter of the sessile drop and liquid/vapour surface tension allows one to attribute degradation of the superhydrophobic and hydrophobic state to reversible and irreversible processes such as hydrolysis of hydrophobic molecules, growth of an oxide layer and so on. A method for estimating both the portion of wetted area and the intrinsic wettability state (hydrophobic versus hydrophilic) of texture elements for a heterogeneous wetting regime is proposed and discussed.

  14. Photochemistry in Organized Media.

    ERIC Educational Resources Information Center

    Fendler, Janos H.

    1983-01-01

    Describes common artificially produced organized media such as colloids, surfactants, and polymers and their usefulness in studying complex biochemical processes. Discusses selected recent photophysical and photochemical exploitations of these systems, including artificial photosynthesis, in situ generation of colloidal gold and platinum,…

  15. The Media Works.

    ERIC Educational Resources Information Center

    Valdes, Joan; Crow, Jeanne

    This student text and activity book provides information on and suggests ways to examine seven of the mass media: movies, television, advertising, magazines, comics, radio, and newspapers. Much of the learning takes place by actual examination of actual products to learn characteristics common to them. The first section investigates the process of…

  16. Media Training

    ScienceCinema

    None

    2016-07-12

    With the LHC starting up soon, the world's media are again turning their attention to CERN. We're all likely to be called upon to explain what is happening at CERN to media, friends and neighbours. The seminar will be given by BBC television news journalists Liz Pike and Nadia Marchant, and will deal with the kind of questions we're likely to be confronted with through the restart period. The training is open for everybody. Make sure you arrive early enough to get a seat - there are only 200 seats in the Globe. The session will also be webcast: http://webcast.cern.ch/

  17. Media Training

    SciTech Connect

    2009-12-11

    With the LHC starting up soon, the world's media are again turning their attention to CERN. We're all likely to be called upon to explain what is happening at CERN to media, friends and neighbours. The seminar will be given by BBC television news journalists Liz Pike and Nadia Marchant, and will deal with the kind of questions we're likely to be confronted with through the restart period. The training is open for everybody. Make sure you arrive early enough to get a seat - there are only 200 seats in the Globe. The session will also be webcast: http://webcast.cern.ch/

  18. Degradation of Iodinated Contrast Media in Aquatic Environment by Means of UV, UV/TiO2 Process, and by Activated Sludge.

    PubMed

    Borowska, Ewa; Felis, Ewa; Żabczyński, Sebastian

    Iodinated contrast media (ICM), which are used for radiological visualization of human tissue and cardiovascular system, are poorly biodegradable; hence, new methods of their removal are sought. In this study, the effectiveness of selected X-ray ICM removal by means of UV and UV/TiO2 pretreatment processes from synthetic hospital wastewater was demonstrated. The following compounds were investigated: iodipamide, iohexol, and diatrizoate. The experiments were as follows: (i) estimated susceptibility of the ICM to decay by UV radiation in different aquatic matrices, (ii) determined an optimal retention time of hospital wastewater in the UV reactor, (iii) determined optimum TiO2 concentration to improve the effectiveness of the UV pretreatment, and (iv) investigated removal of ICM by combination of the photochemical and biological treatment methods. The quantum yields of selected ICM decay in deionized water (pH = 7.0) were established as 0.006, 0.004, and 0.029 for iohexol, diatrizoate, and iodipamide, respectively. Furthermore, the experiments revealed that diatrizoate and iohexol removal in the UV/TiO2 process is more efficient than in UV process alone. For diatrizoate, the removal efficiency equaled to 40 and 30 %, respectively, and for iohexol, the efficiency was 38 and 27 %, respectively. No significant increase in iodipamide removal in UV and UV/TiO2 processes was observed (29 and 28 %, respectively). However, highest removal efficiency was demonstrated in synthetic hospital wastewater with the combined photochemical and biological treatment method. The removal of diatrizoate and iohexol increased to at least 90 %, and for iodipamide, to at least 50 %.

  19. Noble metal-catalyzed homogeneous and heterogeneous processes in treating simulated nuclear waste media with formic acid

    SciTech Connect

    King, R.B.; Bhattacharyya, N.K.; Smith, H.D.

    1995-09-01

    Simulants for the Hanford Waste Vitrification Plant feed containing the major non-radioactive components Al, Cd, Fe, Mn, Nd, Ni, Si, Zr, Na, CO{sub 3}{sup 2}-, NO{sub 3}-, and NO{sub 2}- were used to study reactions of formic acid at 90{degrees}C catalyzed by the noble metals Ru, Rh, and/or Pd found in significant quantities in uranium fission products. Such reactions were monitored using gas chromatography to analyze the CO{sub 2}, H{sub 2}, NO, and N{sub 2}O in the gas phase and a microammonia electrode to analyze the NH{sub 4}+/NH{sub 3} in the liquid phase as a function of time. The following reactions have been studied in these systems since they are undesirable side reactions in nuclear waste processing: (1) Decomposition of formic acid to CO{sub 2} + H{sub 2} is undesirable because of the potential fire and explosion hazard of H{sub 2}. Rhodium, which was introduced as soluble RhCl{sub 3}-3H{sub 2}O, was found to be the most active catalyst for H{sub 2} generation from formic acid above {approximately} 80{degrees}C in the presence of nitrite ion. The H{sub 2} production rate has an approximate pseudo first-order dependence on the Rh concentration, (2) Generation of NH{sub 3} from the formic acid reduction of nitrate and/or nitrite is undesirable because of a possible explosion hazard from NH{sub 4}NO{sub 3} accumulation in a waste processing plant off-gas system. The Rh-catalyzed reduction of nitrogen-oxygen compounds to ammonia by formic acid was found to exhibit the following features: (a) Nitrate rather than nitrite is the principal source of NH{sub 3}. (b) Ammonia production occurs at the expense of hydrogen production. (c) Supported rhodium metal catalysts are more active than rhodium in any other form, suggesting that ammonia production involves heterogeneous rather than homogeneous catalysis.

  20. Oxidation of atrazine in aqueous media by solar- enhanced Fenton-like process involving persulfate and ferrous ion.

    PubMed

    Khandarkhaeva, Marina; Batoeva, Agniya; Aseev, Denis; Sizykh, Marina; Tsydenova, Oyuna

    2017-03-01

    The oxidation of s-triazines (using atrazine (ATZ) as a model compound) by a solar-enhanced Fenton-like process involving persulfate and ferrous ion was studied. A flow-through tubular photoreactor was employed for the experiments. The solar-enhanced oxidative system involving ferrous ion and persulfate (Solar/S2O8(2-)/Fe(2+)) showed the highest ATZ degradation efficiency when compared with other treatments (unactivated S2O8(2-), Solar - sunlight only, S2O8(2-)/Fe(2+), Solar/S2O8(2-)). Complete degradation of ATZ and 20% reduction in total organic carbon (TOC) content were observed after 30min of the treatment. The in situ generated (•)ОН and SO4(-•) radicals were shown to be involved in ATZ oxidation using the radical scavengers methanol and tert-butyl alcohol. Furthermore, iron compounds were shown to act not only as catalysts but also as photo-sensitizers, as the introduction of ferrous ion into the reaction mixture led to an increased absorbance of the solution and expansion of the absorption spectrum into the longer wavelength spectral region.

  1. 3D Imaging of Porous Media Using Laser Scanning Confocal Microscopy with Application to Microscale Transport Processes

    SciTech Connect

    Fredrich, J.T.

    1999-02-10

    We present advances in the application of laser scanning confocal microscopy (LSCM) to image, reconstruct, and characterize statistically the microgeometry of porous geologic and engineering materials. We discuss technical and practical aspects of this imaging technique, including both its advantages and limitations. Confocal imaging can be used to optically section a material, with sub-micron resolution possible in the lateral and axial planes. The resultant volumetric image data, consisting of fluorescence intensities for typically {approximately}50 million voxels in XYZ space, can be used to reconstruct the three-dimensional structure of the two-phase medium. We present several examples of this application, including studying pore geometry in sandstone, characterizing brittle failure processes in low-porosity rock deformed under triaxial loading conditions in the laboratory, and analyzing the microstructure of porous ceramic insulations. We then describe approaches to extract statistical microgeometric descriptions from volumetric image data, and present results derived from confocal volumetric data sets. Finally, we develop the use of confocal image data to automatically generate a three-dimensional mesh for numerical pore-scale flow simulations.

  2. Streaming Media

    ERIC Educational Resources Information Center

    Pulley, John

    2009-01-01

    At a time when the evolutionary pace of new media resembles the real-time mutation of certain microorganisms, the age-old question of how best to connect with constituents can seem impossibly complex--even for an elite institution plugged into the motherboard of Silicon Valley. Identifying the most effective vehicle for reaching a particular…

  3. Media Matters

    ERIC Educational Resources Information Center

    Cooper, Kenneth J.; Pyrillis, Rita; Rosario, Ruben; Stuart, Reginald; Zinngrabe, Elaine

    2007-01-01

    This article presents five vignettes, written by veteran journalists, that focus on the current and future state of journalism. Despite almost daily reports of media consolidation and newspaper layoffs, the journalists sound a cautionary but optimistic tone about the industry. They weigh in on everything from the threats to diversity to the future…

  4. Numerical modeling of Non-isothermal two-phase two-component flow process with phase change phenomena in the porous media

    NASA Astrophysics Data System (ADS)

    Huang, Y.; Shao, H.; Thullner, M.; Kolditz, O.

    2014-12-01

    In applications of Deep Geothermal reservoirs, thermal recovery processes, and contaminated groundwater sites, the multiphase multicomponent flow and transport processes are often considered the most important underlying physical process. In particular, the behavior of phase appearance and disappearance is the critical to the performance of many geo-reservoirs, and great interests exit in the scientific community to simulate this coupled process. This work is devoted to the modeling and simulation of two-phase, two components flow and transport in the porous medium, whereas the phase change behavior in non-isothermal conditions is considered. In this work, we have implemented the algorithm developed by Marchand, et al., into the open source scientific software OpenGeoSys. The governing equation is formulated in terms of molar fraction of the light component and mean pressure as the persistent primary variables, which leads to a fully coupled nonlinear PDE system. One of the important advantages of this approach is avoiding the primary variables switching between single phase and two phase zones, so that this uniform system can be applied to describe the behavior of phase change. On the other hand, due to the number of unkown variables closure relationships are also formulated to close the whole equation system by using the approach of complementarity constrains. For the numerical technical scheme: The standard Galerkin Finite element method is applied for space discretization, while a fully implicit scheme for the time discretization, and Newton-Raphson method is utilized for the global linearization, as well as the closure relationship. This model is verified based on one test case developed to simulate the heat pipe problem. This benchmark involves two-phase two-component flow in saturated/unsaturated porous media under non-isothermal condition, including phase change and mineral-water geochemical reactive transport processes. The simulation results will be

  5. Liquid Salts as Media for Process Heat Transfer from VHTR's: Forced Convective Channel Flow Thermal Hydraulics, Materials, and Coating

    SciTech Connect

    Sridharan, Kumar; Anderson, Mark; Allen, Todd; Corradini, Michael

    2012-01-30

    The goal of this NERI project was to perform research on high temperature fluoride and chloride molten salts towards the long-term goal of using these salts for transferring process heat from high temperature nuclear reactor to operation of hydrogen production and chemical plants. Specifically, the research focuses on corrosion of materials in molten salts, which continues to be one of the most significant challenges in molten salts systems. Based on the earlier work performed at ORNL on salt properties for heat transfer applications, a eutectic fluoride salt FLiNaK (46.5% LiF-11.5%NaF-42.0%KF, mol.%) and a eutectic chloride salt (32%MgCl2-68%KCl, mole %) were selected for this study. Several high temperature candidate Fe-Ni-Cr and Ni-Cr alloys: Hastelloy-N, Hastelloy-X, Haynes-230, Inconel-617, and Incoloy-800H, were exposed to molten FLiNaK with the goal of understanding corrosion mechanisms and ranking these alloys for their suitability for molten fluoride salt heat exchanger and thermal storage applications. The tests were performed at 850C for 500 h in sealed graphite crucibles under an argon cover gas. Corrosion was noted to occur predominantly from dealloying of Cr from the alloys, an effect that was particularly pronounced at the grain boundaries Alloy weight-loss due to molten fluoride salt exposure correlated with the initial Cr-content of the alloys, and was consistent with the Cr-content measured in the salts after corrosion tests. The alloys weight-loss was also found to correlate to the concentration of carbon present for the nominally 20% Cr containing alloys, due to the formation of chromium carbide phases at the grain boundaries. Experiments involving molten salt exposures of Incoloy-800H in Incoloy-800H crucibles under an argon cover gas showed a significantly lower corrosion for this alloy than when tested in a graphite crucible. Graphite significantly accelerated alloy corrosion due to the reduction of Cr from solution by graphite and formation

  6. Informal Learning through Science Media Usage

    ERIC Educational Resources Information Center

    Maier, Michaela; Rothmund, Tobias; Retzbach, Andrea; Otto, Lukas; Besley, John C.

    2014-01-01

    This article reviews current research on informal science learning through news media. Based on a descriptive model of media-based science communication we distinguish between (a) the professional routines by which journalists select and depict scientific information in traditional media and (b) the psychological processes that account for how…

  7. From Gutenberg to Gates: Media Matters

    ERIC Educational Resources Information Center

    Considine, David M.

    2009-01-01

    Media consolidation and convergence have increasingly changed the way individuals as both consumers and citizens access, process, and communicate information at the local, national, and global levels. Media industries and institutions influence public perception and occupy our time at work and at home more and more. Media literacy has become…

  8. Globalised Media, Globalised Cultures: Contingency or Coincidence?

    ERIC Educational Resources Information Center

    Thomas, Amos Owen

    2000-01-01

    Offers a synthesis of media, communications, cultural studies and sociology literature on globalisation that suggests that there is multi-directional causality between media and culture in the process. Suggests that academic theorizing and social policy-making in which global media (particularly television) and local culture are characterized as…

  9. [Chronic otitis mediaChronic Otitis Media].

    PubMed

    Kohles, N; Schulz, T; Eßer, D

    2015-11-01

    There are 2 different kinds of chronic otitis media: Otitis media chronica mesotympanalis and otitis media chronica epitympanalis (cholesteatoma). The incidence of chronic otitis media as reported in literature differs in a wide range. The incidence rates vary between 0.45 and 46%. Both, otitis media chronica mesotympanalis and cholesteatoma, lead to eardrum perforation due to lengthy and recurring inflammations. Furthermore, chronic otitis media is characterized by frequently recurring otorrhea and conductive hearing loss.

  10. Making sense of policy choices: understanding the roles of value predispositions, mass media, and cognitive processing in public attitudes toward nanotechnology

    NASA Astrophysics Data System (ADS)

    Ho, Shirley S.; Scheufele, Dietram A.; Corley, Elizabeth A.

    2010-10-01

    Using a nationally representative telephone survey of 1,015 adults in the United States, this study examines how value predispositions, communication variables, and perceptions of risks and benefits are associated with public support for federal funding of nanotechnology. Our findings show that highly religious individuals were less supportive of funding of nanotech than less religious individuals, whereas individuals who held a high deference for scientific authority were more supportive of funding of the emerging technology than those low in deference. Mass media use and elaborative processing of scientific news were positively associated with public support for funding, whereas factual scientific knowledge had no significant association with policy choices. The findings suggest that thinking about and reflecting upon scientific news promote better understanding of the scientific world and may provide a more sophisticated cognitive structure for the public to form opinions about nanotech than factual scientific knowledge. Finally, heuristic cues including trust in scientists and perceived risks and benefits of nanotech were found to be associated with public support for nanotech funding. We conclude with policy implications that will be useful for policymakers and science communication practitioners.

  11. The MAST FV/FE scheme for the simulation of two-dimensional thermohaline processes in variable-density saturated porous media

    NASA Astrophysics Data System (ADS)

    Aricò, Costanza; Tucciarelli, Tullio

    2009-03-01

    A novel methodology for the simulation of 2D thermohaline double diffusive processes, driven by heterogeneous temperature and concentration fields in variable-density saturated porous media, is presented. The stream function is used to describe the flow field and it is defined in terms of mass flux. The partial differential equations governing system is given by the mass conservation equation of the fluid phase written in terms of the mass-based stream function, as well as by the advection-diffusion transport equations of the contaminant concentration and of the heat. The unknown variables are the stream function, the contaminant concentration and the temperature. The governing equations system is solved using a fractional time step procedure, splitting the convective components from the diffusive ones. In the case of existing scalar potential of the flow field, the convective components are solved using a finite volume marching in space and time (MAST) procedure; this solves a sequence of small systems of ordinary differential equations, one for each computational cell, according to the decreasing value of the scalar potential. In the case of variable-density groundwater transport problem, where a scalar potential of the flow field does not exist, a second MAST procedure has to be applied to solve again the ODEs according to the increasing value of a new function, called approximated potential. The diffusive components are solved using a standard Galerkin finite element method. The numerical scheme is validated using literature tests.

  12. Performance evaluation of anaerobic hybrid reactors with different packing media for treating wastewater of mild alkali treated rice straw in ethanol fermentation process.

    PubMed

    Narra, Madhuri; Balasubramanian, Velmurugan; Mehta, Himali; Dixit, Garima; Madamwar, Datta; Shah, Amita R

    2014-01-01

    Four anaerobic hybrid reactors with different packing media viz. gravel (R1), pumice stone (R2), polypropylene saddles (R3) and ceramic saddles (R4) were operated in semi-continuous mode. Biomethanation potential of the wastewater generated during alkali-treatment of rice straw in ethanol production process was investigated at ambient conditions. The reactors were operated with varying organic loading rates (0.861-4.313 g COD l(-1) d(-1)) and hydraulic retention time (3-15 days). Higher COD removal efficiency (69.2%) and methane yield (0.153 l CH4 g(-1) CODadded) were achieved in reactor R2 at 15 days HRT. Modified Stover-Kincannon model was applied to estimate the bio-kinetic coefficients and fitness of the model was checked by the regression coefficient for all the reactors. The model showed an excellent correlation between the experimental and predicted values. The present study demonstrated the treatment of wastewater from alkali treated rice straw for production of biogas.

  13. Making sense of policy choices: understanding the roles of value predispositions, mass media, and cognitive processing in public attitudes toward nanotechnology

    PubMed Central

    Scheufele, Dietram A.; Corley, Elizabeth A.

    2010-01-01

    Using a nationally representative telephone survey of 1,015 adults in the United States, this study examines how value predispositions, communication variables, and perceptions of risks and benefits are associated with public support for federal funding of nanotechnology. Our findings show that highly religious individuals were less supportive of funding of nanotech than less religious individuals, whereas individuals who held a high deference for scientific authority were more supportive of funding of the emerging technology than those low in deference. Mass media use and elaborative processing of scientific news were positively associated with public support for funding, whereas factual scientific knowledge had no significant association with policy choices. The findings suggest that thinking about and reflecting upon scientific news promote better understanding of the scientific world and may provide a more sophisticated cognitive structure for the public to form opinions about nanotech than factual scientific knowledge. Finally, heuristic cues including trust in scientists and perceived risks and benefits of nanotech were found to be associated with public support for nanotech funding. We conclude with policy implications that will be useful for policymakers and science communication practitioners. PMID:21170125

  14. On Media Education

    ERIC Educational Resources Information Center

    Fedorov, Alexander

    2008-01-01

    This monograph analyzes the theory and practice of media education and media literacy. The book also includes the list of Russian media education literature and addresses of websites of the associations for media education.

  15. News Media

    DTIC Science & Technology

    2005-01-01

    and airwaves clogged with commercials. In addition, consolidation allows only a few organizations to exert control over program content, an issue...estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources , gathering and maintaining... control number. 1. REPORT DATE 2005 2. REPORT TYPE N/A 3. DATES COVERED - 4. TITLE AND SUBTITLE News Media 5a. CONTRACT NUMBER 5b. GRANT

  16. Media and the Learning Process.

    ERIC Educational Resources Information Center

    Gagne, Robert M.

    Although the study of learning theory can produce principles applicable to the design of instruction, virtually no instructional materials in existence today have deliberately been prepared on the basis of such principles. Terms used in four different learning theories--motivation, (Neal Miller); stimulus control (Skinner); distinctive conditions…

  17. Media Education Initiatives by Media Organizations: The Uses of Media Literacy in Hong Kong Media

    ERIC Educational Resources Information Center

    Chu, Donna; Lee, Alice Y. L.

    2014-01-01

    As more media organizations have engaged in media education, this paper investigates the goals and practices of these activities. This article coins media education initiatives by media organizations with the term "media-organization media literac"y (MOML). Four MOML projects in Hong Kong were selected for examination. Built on critical…

  18. Improving interpretation of geoelectrical signatures arising from biomineralization process in porous media: Low-frequency dielectric spectroscopy measurements on Desulfovibrio vulgaris cell suspensions

    NASA Astrophysics Data System (ADS)

    Zhang, C.; Prodan, C.; Slater, L. D.; Bot, C.; Ntarlagiannis, D.

    2009-12-01

    Previous geophysical studies have demonstrated the sensitivity of complex conductivity measurements to microbial growth, biofilm formation, and microbial-mineral alternations, indicating that complex conductivity has the potential to serve as non-invasive tool for bioremediation monitoring. However, the inherent dielectric properties of microbes and how they might directly contribute to the geophysical responses observed during microbial-mineral transformations are not well understood. As a first step towards improving the understanding of electrical signals from microbial-mineral transformations in porous media, we studied the low frequency dielectric properties of sulfate-reducing bacteria (Desulfovibrio vulgaris) cell suspensions, a common soil borne microorganism involved in remediation of toxic metals in solution. We utilized a two-electrode dielectric spectroscopy measurement, common in biophysics applications,to acquire high quality dielectric dispersion curves of Desulfovibrio vulgaris cell suspensions over the frequency range 0.1 Hz to 1M Hz. Desulfovibrio vulgaris cell suspensions were placed between two parallel steel electrodes that are enclosed in a cylindrical glass tube, and the complex impedance of sample was measured relative to a known resistor. The measured impedance includes an electrode polarization impedance arising at the interface between electrodes and ionic solutions at low frequencies. This electrode impedance has traditionally precluded the reliable interpretation of two electrode techniques at low frequencies (< 1000 Hz). In order to obtain the true dielectric dispersion curve of sample, we adopt a simple and robust strategy to measure, analyze and remove the polarization impedance. The feasibility of this polarization removal technique was tested on water saturated glass beads. We show that the broadband dielectric response of Desulfovibrio vulgaris can be reliably determined with this approach. The measurements are modeled based on a

  19. Health and media: a partnership.

    PubMed

    Ling, J C

    1985-12-01

    There has been growing awareness among professionals engaged in marketing and advertising that modern advertising methods can be applied in support of social goals, including health. This has been accompanied by a recognition among health professionals that health is a social phenomenon dependent upon an adequately informed public. However, the health and media sectors have grown apart in past decades. The former tends to be technical and scientific, while the latter is geared to the broadest common denominator of the public. Health professionals often view the mass media with suspicion, and promotion is mistakenly associated with advertising. This paper draws attention to the need for these 2 sectors to work more closely together. Without the involvement of the media, the health sector will not be able to inform the general public on health issues or help stimulate a process of community involvement. Without the technical input of the health sector, the media cannot fulfill their obligation of serving the interests of the public. The role of the media to raise consciousness, stimulate public discussion, articulate public aspirations, disseminate information, and reflect social norms has become established. However, for health practices to be adopted, media input must be complemented by face-to-face communication and should be part of a multifacted program of health services and action. Cooperation between the media and the health sector should be broadened in the years ahead a process that could significantly enhance health and social development.

  20. Heterogeneous recording media

    NASA Astrophysics Data System (ADS)

    Sukhanov, Vitaly I.

    1991-02-01

    The paper summarizes the results of investigations performed to obtain deep 3-D holograms with 102 i0 mkm physical thickness allowing the postexposure amplification and the a posteriori changing of the grating parameters. This aim has been achieved by developing heterogeneous systems on the basis of porous glass with light-sensitive compositions introduced into it. 1. INTRODUCTION. LIGHT-SENSITIVE MEDIA FOR 3-D HOLOGRAMS RECORDING. The 3-D holograms have many useful properties: very high diffraction efficiency angular and spectral selectivity but low level of noise. It shoud be noted that in this case deep 3-D holograms are dealt with whose physical thickness is as high as 102 -i mkm. Such hologram recording is usually done using homogeneous light-sensitive media for example dyed acid-halide and electrooptical crystals photochrome glass photostructurized polimer compositions and so on. The nature of photophisical and photochemical processes responsible for the light sensitivity of these materials exclude the possibility of post-exposure treatment. This does not allow to enhance the recorded holograms and considerably hampers their fixing or makes it practically impossible. The object of our work is to create the media which are quite suitable for two-stage processes of the deep hologram formation with post-exposure processing. Such material must satisfy the following requirements: a)they must have high permeability for the developing substances in order to make the development duration suitable for practical applications b)they must be shrinkproof to prevent deformation of the

  1. Degradation mechanisms and kinetic studies for the treatment of X-ray contrast media compounds by advanced oxidation/reduction processes.

    PubMed

    Jeong, Joonseon; Jung, Jinyoung; Cooper, William J; Song, Weihua

    2010-08-01

    The presence of iodinated X-ray contrast media compounds (ICM) in surface and ground waters has been reported. This is likely due to their biological inertness and incomplete removal in wastewater treatment processes. The present study reports partial degradation mechanisms based on elucidating the structures of major reaction by-products using gamma-irradiation and LC-MS. Studies conducted at concentrations higher than observed in natural waters is necessary to elucidate the reaction by-product structures and to develop destruction mechanisms. To support these mechanistic studies, the bimolecular rate constants for the reaction of OH and e(-)(aq) with one ionic ICM (diatrizoate), four non-ionic ICM (iohexol, iopromide, iopamidol, and iomeprol), and the several analogues of diatrizoate were determined. The absolute bimolecular reaction rate constants for diatrizoate, iohexol, iopromide, iopamidol, and iomeprol with OH were (9.58 +/- 0.23)x10(8), (3.20 +/- 0.13)x10(9), (3.34 +/- 0.14)x10(9), (3.42 +/- 0.28)x10(9), and (2.03 +/- 0.13) x 10(9) M(-1) s(-1), and with e(-)(aq) were (2.13 +/- 0.03)x10(10), (3.35 +/- 0.03)x10(10), (3.25 +/- 0.05)x10(10), (3.37 +/- 0.05)x10(10), and (3.47 +/- 0.02) x 10(10) M(-1) s(-1), respectively. Transient spectra for the intermediates formed by the reaction of OH were also measured over the time period of 1-100 micros to better understand the stability of the radicals and for evaluation of reaction rate constants. Degradation efficiencies for the OH and e(-)(aq) reactions with the five ICM were determined using steady-state gamma-radiolysis. Collectively, these data will form the basis of kinetic models for application of advanced oxidation/reduction processes for treating water containing these compounds.

  2. The Effects of Frequency of Media Utilization on Decision Making of Media Choice

    ERIC Educational Resources Information Center

    Gotoh, Yasushi

    2014-01-01

    The purpose of this study is to use the Analytic Hierarchy Process in order to identify how frequency of media use in daily life affects decision-making in media choice. 276 university students took part in this research, They were asked to prioritize their ways of obtaining information about current affairs using sets of media such as TV, books,…

  3. Measuring News Media Literacy

    ERIC Educational Resources Information Center

    Maksl, Adam; Ashley, Seth; Craft, Stephanie

    2015-01-01

    News media literacy refers to the knowledge and motivations needed to identify and engage with journalism. This study measured levels of news media literacy among 500 teenagers using a new scale measure based on Potter's model of media literacy and adapted to news media specifically. The adapted model posits that news media literate individuals…

  4. Geographic Media Literacy

    ERIC Educational Resources Information Center

    Lukinbeal, Chris

    2014-01-01

    While the use of media permeates geographic research and pedagogic practice, the underlying literacies that link geography and media remain uncharted. This article argues that geographic media literacy incorporates visual literacy, information technology literacy, information literacy, and media literacy. Geographic media literacy is the ability…

  5. Adolescents and media literacy.

    PubMed

    McCannon, Robert

    2005-06-01

    In the face of media industry consolidation, fewer people control media content which makes it harder for parents and citizens to know the research about media-related issues, such as video game violence, nutrition, and sexual risk-taking. Media literacy offers a popular and potentially successful way to counter the misinformation that is spread by Big Media public relations.

  6. The Mass Media Book.

    ERIC Educational Resources Information Center

    Holmgren, Rod, Ed.; Norton, William, Ed.

    This anthology consists of two major sections, "The News Media" and "The Entertainment Media." Both feature essays by critics, working professionals, and professional observers of the media. One aim of the anthology is to show the pervasive effect of the media on us. The section on news media comments on such topics as credibility gap, Vice…

  7. Theological Media Literacy Education and Hermeneutic Analysis of Soviet Audiovisual Anti-Religious Media Texts in Students' Classroom

    ERIC Educational Resources Information Center

    Fedorov, Alexander

    2015-01-01

    This article realized the Russian way of theological media education literacy and hermeneutic analysis of specific examples of Soviet anti-religious audiovisual media texts: a study of the process of interpretation of these media texts, cultural and historical factors influencing the views of the media agency/authors. The hermeneutic analysis…

  8. Reason and Reaction: The Dual Route of Decision Making Process on Social Media Usage: The Case of Hospitality Brand Fan Pages

    ERIC Educational Resources Information Center

    Manthiou, Aikaterini

    2012-01-01

    A new phenomenon on Facebook, resulting from social media revolution, is the emergence of numerous Facebook fan pages. This form of online brand community is an effective tool for building relationships with consumers. Many hospitality firms (i.e. restaurants) have captured the strength of a fan page because it can enhance brand attractiveness and…

  9. Beethoven: architecture for media telephony

    NASA Astrophysics Data System (ADS)

    Keskinarkaus, Anja; Ohtonen, Timo; Sauvola, Jaakko J.

    1999-11-01

    This paper presents a new architecture and techniques for media-based telephony over wireless/wireline IP networks, called `Beethoven'. The platform supports complex media transport and mobile conferencing for multi-user environments having a non-uniform access. New techniques are presented to provide advanced multimedia call management over different media types and their presentation. The routing and distribution of the media is rendered over the standards based protocol. Our approach offers a generic, distributed and object-oriented solution having interfaces, where signal processing and unified messaging algorithms are embedded as instances of core classes. The platform services are divided into `basic communication', `conferencing' and `media session'. The basic communication form platform core services and supports access from scalable user interface to network end-points. Conferencing services take care of media filter adaptation, conversion, error resiliency, multi-party connection and event signaling, while the media session services offer resources for application-level communication between the terminals. The platform allows flexible attachment of any number of plug-in modules, and thus we use it as a test bench for multiparty/multi-point conferencing and as an evaluation bench for signal coding algorithms. In tests, our architecture showed the ability to easily be scaled from simple voice terminal to complex multi-user conference sharing virtual data.

  10. FOREWORD: International Topical Workshop on Plasma Physics: Coherent Processes in Nonlinear Media. Sponsored by the ICTP (Trieste) and the European Union (Brussels)

    NASA Astrophysics Data System (ADS)

    Shukla, P. K.; Bingham, R.; Stenflo, L.; Dawson, J. M.

    1996-01-01

    Starting in 1989 we have created a forum at the International Centre for Theoretical Physics, Trieste, where scientists from different parts of the world can meet and exchange information in the frontier areas of physics. In the three previous meetings, we focused on large amplitude waves and fields in plasmas, the physics of dusty plasmas, and wave-particle interactions and energization in plasmas. In 1995, we came up with a fresh idea of organizing somewhat enlarged but still well focused research topics that are cross-disciplinary. Thus, the usual 'fourth-week activity' of the Plasma Physics College at the ICTP was replaced by an International Topical Workshop on Plasma Physics: Coherent Processes in Nonlinear Media, which was held at the ICTP during the period 16-20 October, 1995. This provided us an opportunity to draw eminent speakers from many closely related fields such as plasma physics, fluid dynamics, nonlinear optics, and astrophysics. The Workshop was attended by 82 delegates from 34 countries, and the participation from the industrial and the developing countries was about half each. The programme included 4 review and 29 topical invited lectures. In addition, about 30 contributed papers were presented as posters in two sessions. The latter were created in order to give opportunities to younger physicists for displaying the results of their recent work and to obtain constructive comments from the other participants. During the five days at the ICTP, we focused on almost all the various aspects of nonlinear phenomena that are common in different branches of science. The review and topical lectures as well as the posters dealt with the most recent advances in coherent nonlinear processes in space and astrophysical plasmas, in fluids and optics, in low temperature dusty plasmas, as well as in laser produced and magnetically confined laboratory plasmas. The focus was on the physics of various types of waves and their generation mechanisms, the development

  11. Children and media.

    PubMed

    Patankar, M

    1989-01-01

    Program developers in India's mass media are turning to the discipline of child development to increase their sensitivity to the special needs and capacities of child audiences. Children are particularly susceptible to having their thoughts, feelings, values, and behavior influenced by media programming. In India, radio is the medium with the greatest opportunity to communicate with children and programming for young people includes educational material, variety programs, quiz shows, drama, and live programs in which children participate. The 1st Children's Film Festival was held in India in 1952 and India participates in the International Center of Films for Children and Young People. Television enjoys popularity among children, illiterates, and the poor, but its potential to create social awareness, change behaviors, and raise the standard of living of the Indian people has not been fully realized. Drama is less able to reach large numbers of children, but offers children the opportunity to participate directly in the portrayal of different characters and emotions. Recently, the tradition of puppetry has been rivived and integrated into India's school curriculum. Finally, India is taking steps to expand the number of books available to children and the Government has established 2 trusts to support the publication of children's literature. Regardless of the form of media, it is important for parents to play a role in ensuring the appropriateness of the programming for the child and processing its content.

  12. The Media Teacher's Handbook

    ERIC Educational Resources Information Center

    Scarratt, Elaine, Ed.; Davison, Jon, Ed.

    2011-01-01

    "The Media Teacher's Handbook" is an indispensible guide for all teachers, both specialist and non-specialist, delivering Media Studies and media education in secondary schools and colleges. It is the first text to draw together the three key elements of secondary sector teaching in relation to media study--the "theoretical",…

  13. How the Media Teach

    ERIC Educational Resources Information Center

    Cortes, Carlos E.

    2005-01-01

    The mass media teach whether or not mediamakers intend to or realize it, and users learn from the media whether or not they try or are even aware of it. This means all of the media, including newspapers, magazines, movies, television, radio, and the new cyberspace media serve as informal yet omnipresent nonschool textbooks. This raises an…

  14. Selecting Media for Instruction.

    ERIC Educational Resources Information Center

    Evans, L. J.

    This study was conducted to determine the effects of instruction on using a formal media selection procedure on the media selection choices made by novice instructional designers. Twenty-nine male and female graduate students enrolled in a media design course at Arizona State University participated in the study. Media design problems were used…

  15. Living within the Media

    ERIC Educational Resources Information Center

    Griffin, Erin

    2005-01-01

    In this article, the author shares how media affects her as a teenager. The author says that media has such a relationship with the world today, specifically with teenagers like her. Media gives off so much information that can be valid or invalid, positive or negative. The media can persuade anyone to do something or to think a certain way.…

  16. Media Literacy Bibliography.

    ERIC Educational Resources Information Center

    Duncan, Barry

    1989-01-01

    Provides an up-to-date bibliography of resources available for teaching media literacy. Groups resources into the areas of media education methodology, mass media texts, general background, television, film, the news and medium of print, advertising, gender and the media, popular culture, popular music and rock video, periodicals, and…

  17. Why Media Matter

    ERIC Educational Resources Information Center

    Locatis, Craig

    2007-01-01

    Whether media affect learning has been debated for decades. The discussion of media's effectiveness has raised questions about the usefulness of comparison studies, not only in assessing applications of technology but in other areas as well. Arguments that media do not affect learning are re-examined and issues concerning media effects on expert…

  18. Media Violence and Children.

    ERIC Educational Resources Information Center

    Groebel, Jo

    1998-01-01

    Presents the results of the UNESCO global study on media violence and children which was conducted between 1996 and 1997. Highlights include the role of the media, media heroes as role models, media violence and aggression, differences by gender, rural versus urban environments, the pervasiveness of television, and recommendations. (Author/LRW)

  19. Social media networking: blogging.

    PubMed

    Schneider, Andrew; Jackson, Rem; Baum, Neil

    2010-01-01

    Social media networking is not your teenager's social media. It is a powerful tool that will change the way you communicate with your patients. This article will review the impact of social media and how social media can be a valuable tool for your medical practice. This is the first of a three-part article on social media and will discuss the use of blogging for medical practices.

  20. Thermal MEMS actuator operation in aqueous media/seawater: Performance enhancement through atomic layer deposition post processing of PolyMUMPs devices

    SciTech Connect

    Warnat, Stephan Forbrigger, Cameron; Hubbard, Ted; Bertuch, Adam; Sundaram, Ganesh

    2015-01-15

    A method to enhance thermal microelectromechanical systems (MEMS) actuators in aqueous media by using dielectric encapsulation layers is presented. Aqueous media reduces the available mechanical energy of the thermal actuator through an electrical short between actuator structures. Al{sub 2}O{sub 3} and TiO{sub 2} laminates with various thicknesses were deposited on packaged PolyMUMPs devices to electrically separate the actuator from the aqueous media. Atomic layer deposition was used to form an encapsulation layer around released MEMS structures and the package. The enhancement was assessed by the increase of the elastic energy, which is proportional to the mechanical stiffness of the actuator and the displacement squared. The mechanical stiffness of the encapsulated actuators compared with the noncoated actuators was increased by factors ranging from 1.45 (for 45 nm Al{sub 2}O{sub 3} + 20 nm TiO{sub 2}) to 1.87 (for 90 nm Al{sub 2}O{sub 3} + 40 nm TiO{sub 2}). Displacement measurements were made for all laminate combinations in filtered tap water and seawater by using FFT based displacement measurement technique with a repeatability of ∼10 nm. For all laminate structures, the elastic energy increased and enhanced the actuator performance: In seawater, the mechanical output energy increased by factors ranging from 5 (for 90 nm Al{sub 2}O{sub 3}) to 11 (for 90 nm Al{sub 2}O{sub 3} + 40 nm TiO{sub 2}). The authors also measured the long-term actuator stability/reliability in seawater. Samples were stored for 29 days in seawater and tested for 17 days in seawater. Laminates with TiO{sub 2} layers allowed constant operation over the entire measurement period.

  1. Media Education of Future Native Language Teachers: Experience of Germany and Ukraine

    ERIC Educational Resources Information Center

    Yachmenyk, Maryna

    2014-01-01

    The achievements of media education in higher education of Germany have been highlighted. The notions of media education that exist in scientific literature have been outlined. Media education has been defined as a direction in pedagogy (media pedagogy) aimed at an individual's media-culture formation in society, as well as a process of…

  2. Traditional Forms of Communication and the Mass Media in India. Communication and Society, 13.

    ERIC Educational Resources Information Center

    Malik, Madhu

    Oral folklore and folk drama are emphasized in this report, which focuses on the use of folk media to convey developmental messages through mass media agencies. Discussion covers the relationship between folk and mass media, experiments in India to integrate the two media, problems encountered in the integration process, and folk media's potential…

  3. Social media and disasters: a functional framework for social media use in disaster planning, response, and research.

    PubMed

    Houston, J Brian; Hawthorne, Joshua; Perreault, Mildred F; Park, Eun Hae; Goldstein Hode, Marlo; Halliwell, Michael R; Turner McGowen, Sarah E; Davis, Rachel; Vaid, Shivani; McElderry, Jonathan A; Griffith, Stanford A

    2015-01-01

    A comprehensive review of online, official, and scientific literature was carried out in 2012-13 to develop a framework of disaster social media. This framework can be used to facilitate the creation of disaster social media tools, the formulation of disaster social media implementation processes, and the scientific study of disaster social media effects. Disaster social media users in the framework include communities, government, individuals, organisations, and media outlets. Fifteen distinct disaster social media uses were identified, ranging from preparing and receiving disaster preparedness information and warnings and signalling and detecting disasters prior to an event to (re)connecting community members following a disaster. The framework illustrates that a variety of entities may utilise and produce disaster social media content. Consequently, disaster social media use can be conceptualised as occurring at a number of levels, even within the same disaster. Suggestions are provided on how the proposed framework can inform future disaster social media development and research.

  4. Heterogeneous porous media in hydrology

    NASA Astrophysics Data System (ADS)

    Ababou, Rachid

    In natural geologic formations, flow and transport-related processes are perturbed by multidimensional and anisotropic material heterogeneities of diverse sizes, shapes, and origins (bedding, layering, inclusions, fractures, grains, for example). Heterogeneity tends to disperse and mix transported quantities and may initiate new transfer mechanisms not seen in ideally homogeneous porous media. Effective properties such as conductivity and dispersivity may not be simple averages of locally measured quantities.The special session, “Effective Constitutive Laws for Heterogeneous Porous Media,” convened at AGU's 1992 Fall Meeting in San Francisco, addressed these issue. Over forty-five contributions, both oral and poster, covering a broad range of physical phenomena were presented. The common theme was the macroscale characterization and modeling of flow and flow-related processes in geologic media that are heterogeneous at various scales (from grain size or fracture aperture, up to regional scales). The processes analyzed in the session included coupled hydro-mechanical processes; Darcy-type flow in the saturated, unsaturated, or two-phase regimes; tracer transport, dilution, and dispersion. These processes were studied for either continuous (porous) or discontinuous (fractured) media.

  5. Investigation of the mechanisms of using metal complexation and cellulose nanofiber/sodium alginate layer-by-layer coating for retaining anthocyanin pigments in thermally processed blueberries in aqueous media.

    PubMed

    Jung, Jooyeoun; Cavender, George; Simonsen, John; Zhao, Yanyun

    2015-03-25

    This study investigated the mechanisms of anthocyanin pigment retention using Fe(3+)-anthocyanin complexation and cellulose nanofiber (CNF)/sodium alginate (SA) layer-by-layer (LBL) coatings on thermally processed blueberries in aqueous media. Anthocyanin pigments were polymerized through complexation with Fe(3+) but readily degraded by heat (93 °C for 7 min) in the aqueous media because of poor stability. CNF/SA LBL coating was successful to retain anthocyanin pigments in thermally processed blueberries. Fruits coated with CNF containing CaCl2 followed by treatment in a SA bath formed a second hydrogel layer onto the CNF layer (LBL coating system) through cross-linking between Ca(2+) and alginic acid. Methyl-cellulose-modified CNF improved the interactions between CNF, the fruit surface, and the SA layer. This study demonstrated that the CNF/SA LBL coating system was effective to retain anthocyanin pigments on thermally processed whole blueberries, whereas no combined benefit of complexation with coating was observed. Results explained the mechanisms of the new approaches for developing colorful and nutritionally enhanced anthocyanin-rich fruit products.

  6. Media, racism and public health psychology.

    PubMed

    Nairn, Raymond; Pega, Frank; McCreanor, Tim; Rankine, Jenny; Barnes, Angela

    2006-03-01

    International literature has established that racism contributes to ill-health of migrants, ethnic minorities and indigenous peoples. Racism generally negates wellbeing, adversely affecting physical and psychological health. Numerous studies have shown that media contribute marginalizing particular ethnic and cultural groups depicting them primarily as problems for and threats to the dominant. This articles frames media representations of, and their effect on, the indigenous Maori of Aotearoa, New Zealand within the ongoing processes of colonization. We argue that reflects the media contribution to maintenance and naturalisation of colonial relationships and seek to include critical media scholarship in a critical public health psychology.

  7. The School Media Center: A Conceptual Model.

    ERIC Educational Resources Information Center

    Hodson, Yvonne D.

    1979-01-01

    Describes a model for a school media center which will serve as a strategic learning facility. The model is based upon research in both media and education dealing with behavioristic psychology, personality theory, cognitive psychology, and theories of learning as information processing. (Author/FM)

  8. Media Violence and Antisocial Behavior: An Overview.

    ERIC Educational Resources Information Center

    Huesmann, L. Rowell; Malamuth, Neil M.

    1986-01-01

    Discusses general issues that have shaped research on whether depictions of violence in television and other media significantly influence real-life aggressive behavior. Presents a theoretical framework for understanding media effects on the psychological processes of acquisition, maintenance, and emission of aggression. Outlines contents of this…

  9. Elections, Image or Issues? Media & Values 44.

    ERIC Educational Resources Information Center

    Thoman, Elizabeth, Ed.; Silver, Rosalind, Ed.

    1988-01-01

    This issue of "Media & Values" explores the growing influence of mass media on the election process in the United States. The essays present various interpretations of that influence and the implications for the nation. The magazine is divided into three sections. The introductory section includes: (1) "Where Have All the Leaders Gone?" (Daniel…

  10. Media Agenda-Building and Election Campaigns.

    ERIC Educational Resources Information Center

    Manning-Miller, Carmen L.

    To examine factors which influenced the media's agenda-building process during a primary election period in Mississippi, a study explored candidates' personal attributes, campaign resourcefulness, and media connectedness as important agenda-building variables. Candidates for Mississippi's United States House of Representatives seats in 1982 and…

  11. A Library Media Center: Makeover Story

    ERIC Educational Resources Information Center

    Hill, Ann; Gaughan, Stephanie

    2006-01-01

    A library media center is the information hub of the school, but it is beginning to look a little frayed at the shelves and it's time for a makeover. In this article, the authors present the steps in the makeover process and provide creative ideas to improve the atmosphere of the library media center. Before the makeover, there should be a plan.…

  12. The Context of Media Study.

    ERIC Educational Resources Information Center

    O'Grady, Gerald

    Media study is centered on composing and understanding the codes of three image-making technologies--film, video, and computer. It locates these activities within the context of the changing materials, processes, and systems of these technologies; within contemporary developments in their creative and critical practices; and within the evolution…

  13. METAL MEDIA FILTERS, AG-1 SECTION FI

    SciTech Connect

    Adamson, D.

    2012-05-23

    One application of metal media filters is in various nuclear air cleaning processes including applications for protecting workers, the public and the environment from hazardous and radioactive particles. To support this application the development of the ASME AG-1 FI Standard on Metal Media has been under way for more than ten years. Development of the proposed section has required resolving several difficult issues associated with operating conditions (media velocity, pressure drop, etc.), qualification testing, and quality acceptance testing. Performance characteristics of metal media are dramatically different than the glass fiber media with respect to parameters like differential pressures, operating temperatures, media strength, etc. These differences make existing data for a glass fiber media inadequate for qualifying a metal media filter for AG-1. In the past much work has been conducted on metal media filters at facilities such as Lawrence Livermore National Laboratory (LLNL) and Savannah River National Laboratory (SRNL) to qualify the media as High Efficiency Particulate Air (HEPA) Filters. Particle retention testing has been conducted at Oak Ridge Filter Test Facility and at Air Techniques International (ATI) to prove that the metal media meets or exceeds the 99.97% particle retention required for a HEPA Filter. Even with his testing, data was lacking to complete an AG-1 FI Standard on metal media. With funding secured by Mississippi State University (MSU) from National Nuclear Security Administration (NNSA), a research test stand is being designed and fabricated at MSU's Institute for Clean Energy Technology (ICET) Facility to obtain qualification data on metal media. This in turn will support required data needed for the FI Standard. The paper will discuss in detail how the test stand at MSU will obtain the necessary data to complete the FI Standard.

  14. Mass Media: The Invisible Environment.

    ERIC Educational Resources Information Center

    Glessing, Robert J.; White, William P.

    This anthology for students of media consists of essays and articles grouped under four topics: media forms, media content, media environments, and "the last word." Media forms deals with the nature of these kinds of media: electronic, print, film, music, and comics, graffiti, and clothing. Media content contains articles on the news, advertising,…

  15. New media, old media: The technologies of international development

    NASA Astrophysics Data System (ADS)

    Ingle, Henry T.

    1986-09-01

    The research, theory and practice of educational technology over the past 75 years provide convincing evidence that this process offers a comprehensive and integrated approach to solving educational and social problems. The use of media and technology in development has shifted from an emphasis on mass media to personal media. A variety of electronic delivery systems are being used and are usually coordinated by centralized governmental agencies. There are no patterns of use since the problems vary and the medium used is responsive to the problem. Computers are used most frequently and satellite telecommunication networks follow. The effective use of these and other technologies requires a long-term commitment to financial support and training of personnel. The extension model of face-to-face contact still prevails in developing nations whether in agriculture, education or rural development. Low-cost technologies are being used in local projects while major regional and national companies use radio, film and related video technologies. The use of all available and cost-effective media and technologies make possible appropriate communications for specific goals with specific audiences. There appears to be no conflict among proponents of various media formats. Development in education and other sectors has much to gain from old and new communication technologies and has hardly been tapped. Several new educational technology developments are discussed as potential contributors to formal and nonformal education.

  16. Using Social Media to Teach Social Media

    ERIC Educational Resources Information Center

    Rheingold, Howard

    2008-01-01

    By showing students how to use Web-based channels to inform publics, advocate positions, contest claims, and organize action around issues they care about, participatory media education can influence civic behavior positively throughout their lives. Participatory media literacy is necessarily a hands-on enterprise, requiring active use of digital…

  17. Zinc enhanced hard disk media

    DOEpatents

    Zou, Jie; Lambeth, David N.; Laughlin, David E.

    2002-01-01

    The present invention provides a magnetic recording media incorporating Zn containing layers in close proximity to a magnetic layer to provide media having increased coercivity and lower noise. The Zn containing layer can be incorporated in a rotating, translating or stationary recording media to operate in conjunction with magnetic transducing heads for recording and reading of magnetic data, as well as other applications. The magnetic recording medium of the invention preferably includes a Co or Co alloy film magnetic layer, underlayer structures to promote epitaxial crystalline structure in the magnetic layer, and a Zn containing layer to promote isolation between the magnetic grains. The medium can further include seed layers, underlayers, intermediate layers, and overlayers. The process of manufacture includes promoting diffusion of Zn to the magnetic layer grain boundaries.

  18. Social media for lifelong learning.

    PubMed

    Kind, Terry; Evans, Yolanda

    2015-04-01

    Learning is ongoing, and can be considered a social activity. In this paper we aim to provide a review of the use of social media for lifelong learning. We start by defining lifelong learning, drawing upon principles of continuous professional development and adult learning theory. We searched Embase and MEDLINE from 2004-2014 for search terms relevant to social media and learning. We describe examples of lifelong learners using social media in medical education and healthcare that have been reported in the peer-reviewed literature. Medical or other health professions students may have qualities consistent with being a lifelong learner, yet once individuals move beyond structured learning environments they will need to recognize their own gaps in knowledge and skills over time and be motivated to fill them, thereby incorporating lifelong learning principles into their day-to-day practice. Engagement with social media can parallel engagement in the learning process over time, to the extent that online social networking fosters feedback and collaboration. The use of social media and online networking platforms are a key way to continuously learn in today's information sharing society. Additional research is needed, particularly rigorous studies that extend beyond learner satisfaction to knowledge, behaviour change, and outcomes.

  19. Automating the Media Center.

    ERIC Educational Resources Information Center

    Holloway, Mary A.

    1988-01-01

    Discusses the need to develop more efficient information retrieval skills by the use of new technology. Lists four stages used in automating the media center. Describes North Carolina's pilot programs. Proposes benefits and looks at the media center's future. (MVL)

  20. Media, Metaphors, and Models.

    ERIC Educational Resources Information Center

    Costanzo, William V.

    1988-01-01

    Explores how students are influenced by media technology, specifically television and computers. Notes that media are not just a vehicle of information, but are primarily models of how to see, think, read, write, and reason. (MM)

  1. Pacific Southwest Media Center

    EPA Pesticide Factsheets

    News media, state and local officials, and others can find press releases, media events and contacts in EPA's Pacific Southwest. Additional resources include newsletters, annual reports, and library services that support regional activities.

  2. Catholic Media and Youth.

    ERIC Educational Resources Information Center

    Nunes, Stephen A.

    1980-01-01

    Discusses the impact of media on youth and suggests some possible directions for the Catholic media, especially in the areas of textbooks, magazines, television, movies, and radio, in responding to the needs of youth. (Author/FM)

  3. Trends in media use.

    PubMed

    Roberts, Donald F; Foehr, Ulla G

    2008-01-01

    American youth are awash in media. They have television sets in their bedrooms, personal computers in their family rooms, and digital music players and cell phones in their backpacks. They spend more time with media than any single activity other than sleeping, with the average American eight- to eighteen-year-old reporting more than six hours of daily media use. The growing phenomenon of "media multitasking"--using several media concurrently--multiplies that figure to eight and a half hours of media exposure daily. Donald Roberts and Ulla Foehr examine how both media use and media exposure vary with demographic factors such as age, race and ethnicity, and household socioeconomic status, and with psychosocial variables such as academic performance and personal adjustment. They note that media exposure begins early, increases until children begin school, drops off briefly, then climbs again to peak at almost eight hours daily among eleven- and twelve-year-olds. Television and video exposure is particularly high among African American youth. Media exposure is negatively related to indicators of socioeconomic status, but that relationship may be diminishing. Media exposure is positively related to risk-taking behaviors and is negatively related to personal adjustment and school performance. Roberts and Foehr also review evidence pointing to the existence of a digital divide--variations in access to personal computers and allied technologies by socioeconomic status and by race and ethnicity. The authors also examine how the recent emergence of digital media such as personal computers, video game consoles, and portable music players, as well as the media multitasking phenomenon they facilitate, has increased young people's exposure to media messages while leaving media use time largely unchanged. Newer media, they point out, are not displacing older media but are being used in concert with them. The authors note which young people are more or less likely to use several

  4. Struggle for Social Position in Digital Media Composition

    ERIC Educational Resources Information Center

    Doerr-Stevens, Candance

    2013-01-01

    This study investigates the processes and products of multimodal and multi-authored digital media composition. Using ethnographic case study and Mediated Discourse Analysis (Norris & Jones, 2005), this study focuses specifically on the digital media composition of radio and film documentaries, examining struggle among students, media, and…

  5. Digital Media's Transformative Role in Education: Beyond Potential to Essential

    ERIC Educational Resources Information Center

    Chien, Ming-tso

    2012-01-01

    Achieving effective learning via digital media continues to be a major concern in contemporary education. The daily use of all forms of digital media is part of our lives and therefore becomes a key component of education. Educators must consider the process of digital media curriculum as a learning model and form of experience adapted to…

  6. Interaction with Mass Media: The Importance of Rhythm and Tempo.

    ERIC Educational Resources Information Center

    Snow, Robert P.

    1987-01-01

    Stresses that understanding the impact of interaction with mass media requires conceptualizing media as an institutionalized social form. A critical feature of this process is the grammatical character of media interaction in the form of rhythm and tempo, because these rhythms and tempos become established in everyday routine. (SKC)

  7. 7 CFR 52.773 - Liquid media and Brix measurements.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 7 Agriculture 2 2012-01-01 2012-01-01 false Liquid media and Brix measurements. 52.773 Section 52... PROCESSED FOOD PRODUCTS 1 United States Standards for Grades of Canned Red Tart Pitted Cherries 1 Liquid Media and Brix Measurements § 52.773 Liquid media and Brix measurements. (a) Brix...

  8. 7 CFR 52.773 - Liquid media and Brix measurements.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 2 2011-01-01 2011-01-01 false Liquid media and Brix measurements. 52.773 Section 52... PROCESSED FOOD PRODUCTS 1 United States Standards for Grades of Canned Red Tart Pitted Cherries 1 Liquid Media and Brix Measurements § 52.773 Liquid media and Brix measurements. (a) Brix...

  9. Media and Symbol Systems as Related to Cognition and Learning.

    ERIC Educational Resources Information Center

    Salomon, Gavriel

    1979-01-01

    The failure of research on media to deal with media's symbol systems is discussed. Nature of symbol systems is described and related to cognition and learning. Symbolic elements used by media can facilitate the cultivation of mental skills in interaction with individual differences and depth of processing. (Author/RD)

  10. An Unseen Hand: The Mass Media and Education Policy.

    ERIC Educational Resources Information Center

    Wallace, Mike

    This paper examines the role of mass media in the British education policy process, in particular, how the mass media steer education policy and inhibit certain issues from becoming the subject of policy. The paper describes how media professionals comprise an interest group competing with others to affect education policy; how they and other…

  11. Media Stereotypes Analysis in the Classroom at the Student Audience

    ERIC Educational Resources Information Center

    Fedorov, Alexander

    2015-01-01

    Media Stereotypes Analysis is the identification and analysis of stereotypical images of people, ideas, events, stories, themes and etc. in media texts. Media stereotype reflects the well-established attitudes towards a particular object, it is schematic averaged, familiar, stable representation of genres, social processes/events, ideas, people,…

  12. Mass Media: A Casebook.

    ERIC Educational Resources Information Center

    Hixson, Richard F., Ed.

    Recognizing that mass media--now at a stage of viewing critically its effects and responsibilities--and society at large are interdependent, this casebook reviews the many facets of the media and mass communication as they relate to both producers and consumers of messages. The 23 chapters include discussions of the media's responsibility toward…

  13. Children's Media Policy

    ERIC Educational Resources Information Center

    Jordan, Amy B.

    2008-01-01

    Amy Jordan addresses the need to balance the media industry's potentially important contributions to the healthy development of America's children against the consequences of excessive and age-inappropriate media exposure. Much of the philosophical tension regarding how much say the government should have about media content and delivery stems…

  14. Media, Minds, and Masses.

    ERIC Educational Resources Information Center

    Baggot, James; Vino, Faith

    This booklet describes the language arts course "Media, Minds, and Masses," written for the Dade County, Fla., public schools. Topics for the course include the workings of contemporary radio, television, newspapers, magazines, and movies; the present status and power of media; the history and development of media; and the influences of…

  15. Sizing Up Social Media

    ERIC Educational Resources Information Center

    Pearson, Jerold

    2010-01-01

    Most people are aware of the increasing importance of social media to institutional advancement, and many colleges and universities have started investing resources in these media. The next step is to measure the impact of social media on the institution and evaluate the success of one's efforts. Every advancement leader should understand how…

  16. Modern Media Education Models

    ERIC Educational Resources Information Center

    Fedorov, Alexander

    2011-01-01

    The author supposed that media education models can be divided into the following groups: (1) educational-information models (the study of the theory, history, language of media culture, etc.), based on the cultural, aesthetic, semiotic, socio-cultural theories of media education; (2) educational-ethical models (the study of moral, religions,…

  17. Media in the Netherlands.

    ERIC Educational Resources Information Center

    Klaver, Franca

    This 2-part report summarizes Dutch policy on mass media and reviews the status of cable television in the Netherlands. The first part defines the underlying principles of a national policy on mass media in relation to the press, commercial and educational television broadcasting, radio, cable television, and media research. Parliamentary debate…

  18. Youth Media and Agency

    ERIC Educational Resources Information Center

    Hauge, Chelsey

    2014-01-01

    This article addresses how capacity is conceived of and understood in youth media/civic education programming, and how beliefs about agency, development, relationality and youth manifests in the discourses, programmes, and practices of organizations operating youth media programmes. Through attention to a youth media and development programme in…

  19. Administering Instructional Media Programs.

    ERIC Educational Resources Information Center

    Erickson, Carlton W. H.

    This book presents a wide discussion of the educational and administrative tasks of the instructional media program director. It includes guidelines, principles, case studies, and examples of advanced media use, with emphasis on audiovisual media, the area in which innovation has occurred most. Strong leadership, technological competence, and good…

  20. Adolescents and the Media.

    ERIC Educational Resources Information Center

    Strasburgber, Victor C., Ed.; Comstock, George A., Ed.

    1993-01-01

    In the 1990s, the media represent the single most easily modifiable influence on children and adolescents. This series of articles offers medically oriented practitioners a review of current research on the influence of the media on children and adolescents. The 13 articles are: (1) "Children, Adolescents, and the Media: Five Crucial…

  1. Otitis Media: Effect on a Child's Learning.

    ERIC Educational Resources Information Center

    Gdowski, Becky S.; And Others

    1986-01-01

    The paper reviews the relationship between otitis media, auditory processing, language, and learning development. Suggestions are provided for identifying and managing students with suspected histories of the condition. (CL)

  2. Media Notes: Bringing Government to Life.

    ERIC Educational Resources Information Center

    Sive, Mary Robinson

    1981-01-01

    This column examines some recent media materials for middle and high schools on federal, state, and local government; the legislative process; the presidency; the judicial branch; elections; and citizen participation. Complete ordering information is included. (Author/SJL)

  3. Database Design for Media Center Applications.

    ERIC Educational Resources Information Center

    Livingston, Alan

    1987-01-01

    Outlines procedures for the application of data processing technology to media center functions, and explains four steps in designing a database: preliminary design, selection of software, detailed design, and design evaluation. (LRW)

  4. The Media Workshop Hybrid in Media Education Reform.

    ERIC Educational Resources Information Center

    McCall, Jeffrey M.

    The media workshop and the media laboratory can fit meaningfully into the reforms of mass communication education, but there are distinct differences in their roles. The media workshop is a place where students can serve on-campus apprenticeships with a traditional media organization. The media laboratory is a futuristic media facility that…

  5. Youth, Crime & the Media: Media Representation of and Reaction to Young People in Relation to Law and Order.

    ERIC Educational Resources Information Center

    Bessant, Judith, Ed.; Hil, Richard, Ed.

    The 24 essays in this collection explore the ways in which young people are represented in the media in Australia. Australia's media are full of bad news about young people as perpetrators or victims of crime. The first six chapters explore a range of theoretical issues that connect media reports of young people with processes of governance in…

  6. Reduction of start-up time through bioaugmentation process in microbial fuel cells using an isolate from dark fermentative spent media fed anode.

    PubMed

    Pandit, Soumya; Khilari, Santimoy; Roy, Shantonu; Ghangrekar, M M; Pradhan, Debabrata; Das, Debabrata

    2015-01-01

    An electrochemically active bacteria Pseudomonas aeruginosa IIT BT SS1 was isolated from a dark fermentative spent media fed anode, and a bioaugmentation technique using the isolated strain was used to improve the start-up time of a microbial fuel cell (MFC). Higher volumetric current density and lower start-up time were observed with the augmented system MFC-PM (13.7 A/m(3)) when compared with mixed culture MFC-M (8.72 A/m(3)) during the initial phase. This enhanced performance in MFC-PM was possibly due to the improvement in electron transfer ability by the augmented strain. However, pure culture MFC-P showed maximum volumetric current density (17 A/m(3)) due to the inherent electrogenic properties of Pseudomonas sp. An electrochemical impedance spectroscopic (EIS) study, along with matrix-assisted laser desorption/ionization-time-of-flight (MALDI-TOF) analysis, supported the influence of isolated species in improving the MFC performance. The present study indicates that the bioaugmentation strategy using the isolated Pseudomonas sp. can be effectively utilized to decrease the start-up time of MFC.

  7. Sources and processes affecting the spatio-temporal distribution of pharmaceuticals and X-ray contrast media in the water resources of the Lower Jordan Valley, Jordan.

    PubMed

    Zemann, Moritz; Wolf, Leif; Pöschko, Antje; Schmidt, Natalie; Sawarieh, Ali; Seder, Nayef; Tiehm, Andreas; Hötzl, Heinz; Goldscheider, Nico

    2014-08-01

    The closed basin of the Lower Jordan Valley with the Dead Sea as final sink features high evapotranspiration rates and almost complete reuse of treated wastewater for irrigation farming. This study focuses on the water transfer schemes and the presence, spreading, and potential accumulation of pharmaceutical residues in the local water resources based on findings of a five-year monitoring program. Overall 16 pharmaceuticals and 9 iodinated X-ray contrast media were monitored in groundwater, surface water, and treated wastewater. A total of 95 samples were taken to cover all geographical settings and flow paths from origin (wastewater) to target (groundwater). Nine substances were detected in groundwater, with concentrations ranging between 11 ng/L and 33,000 ng/L. Sometimes, detection rates were higher than in comparable studies: Diatrizoic acid 75%, iopamidol 42%, iopromide 19%, iomeprol 11%, carbamazepine and iohexol 8%, ibuprofen 6%, and fenofibrate and iothalamic acid 3%. Concentrations in groundwater generally increase from north to south depending on the application of treated wastewater for irrigation. Almost all substances occurred most frequently and with highest concentrations in treated wastewater, followed by surface water and groundwater. As exception, diatrizoic acid was found more frequently in groundwater than in treated wastewater, with concentrations being similar. This indicates the persistence of diatrizoic acid with long residence times in local groundwater systems, but may also reflect changing prescription patterns, which would be in accordance with increasing iopamidol findings and surveys at local hospitals. Trend analyses confirm this finding and indicate a high probability of increasing iopamidol concentrations, while other substances did not reveal any trends. However, no proof of evaporative enrichment could be found. The high spatial and temporal variability of the concentrations measured calls for further systematic studies to assess

  8. Negotiated media effects. Peer feedback modifies effects of media's thin-body ideal on adolescent girls.

    PubMed

    Veldhuis, Jolanda; Konijn, Elly A; Seidell, Jacob C

    2014-02-01

    The present study introduces a theoretical framework on negotiated media effects. Specifically, we argue that feedback of peers on thin-body ideal media images and individual dispositions guide effects on adolescent girls' psychosocial responses to media exposure. Therefore, we examined the thin-body ideal as portrayed in media and peers' feedback on such thin-ideal images in their combined effects on adolescent girls' body dissatisfaction, objectified body consciousness, and social comparison with media models. Hence, media models and peer comments were systematically combined as incorporated entities in YouTube-formats. Hypotheses were tested in a 3 (media models: extremely thin vs. thin vs. normal weight)×3 (peer comments: 6kg-underweight vs. 3kg-underweight vs. normal-weight)×2 (appearance schematicity: lower vs. higher) between-subjects design (N=216). Results showed that peer comments indicating that a media model was 'only 3kg-underweight' exerted most negative responses, particularly in girls who strongly process appearance relevant information. Peer feedback interacts with media models in guiding perceptions of what is considered an 'ideal' body shape. Results highlight the important role of peers as well as individual predispositions in view of understanding how thin-ideal media images may impact adolescent girls' body image concerns.

  9. Body image, eating disorders, and the media.

    PubMed

    Hogan, Marjorie J; Strasburger, Victor C

    2008-12-01

    Adolescence is a time of tremendous change in physical appearance. Many adolescents report dissatisfaction with their body shape and size. Forming one's body image is a complex process, influenced by family, peers, and media messages. Increasing evidence shows that the combination of ubiquitous ads for foods and emphasis on female beauty and thinness in both advertising and programming leads to confusion and dissatisfaction for many young people. Sociocultural factors, specifically media exposure, play an important role in the development of disordered body image. Of significant concern, studies have revealed a link between media exposure and the likelihood of having symptoms of disordered eating or a frank eating disorder. Pediatricians and other adults must work to promote media education and make media healthier for young people. More research is needed to identify the most vulnerable children and adolescents.

  10. Fractures in anisotropic media

    NASA Astrophysics Data System (ADS)

    Shao, Siyi

    theory and experimental results in this report demonstrate that the presence of fractures in anisotropic material can be unambiguously interpreted if experimental measurements are made as a function of stress, which eliminates many fracture-generated discrete modes (e.g., interface waves, and leaky guided-modes). Orthogonal fracture networks that are often encountered in field exploration bring in additional challenges for seismic/acoustic data interpretation. An innovative wavefront imaging system with a bi-axial load frame was designed and implemented on orthogonally-fractured samples to determine the effect of fracture networks on elastic wave propagation. The effects of central wave guiding and extra time delays along a fracture intersection were observed in experiments and was analyzed. Interpreting data from media with intersecting fracture sets must account for fracture intersections and the non-uniformity of fracture properties caused by local tectonic conditions or other physical process such as non-uniform fluid distributions within a network and/or chemical alterations.

  11. Method and System for Producing Full Motion Media to Display on a Spherical Surface

    NASA Technical Reports Server (NTRS)

    Starobin, Michael A. (Inventor)

    2015-01-01

    A method and system for producing full motion media for display on a spherical surface is described. The method may include selecting a subject of full motion media for display on a spherical surface. The method may then include capturing the selected subject as full motion media (e.g., full motion video) in a rectilinear domain. The method may then include processing the full motion media in the rectilinear domain for display on a spherical surface, such as by orienting the full motion media, adding rotation to the full motion media, processing edges of the full motion media, and/or distorting the full motion media in the rectilinear domain for instance. After processing the full motion media, the method may additionally include providing the processed full motion media to a spherical projection system, such as a Science on a Sphere system.

  12. The role of media literacy in shaping adolescents' understanding of and responses to sexual portrayals in mass media.

    PubMed

    Pinkleton, Bruce E; Austin, Erica Weintraub; Chen, Yi-Chun Yvonnes; Cohen, Marilyn

    2012-01-01

    This study was a theory-based, pretest-posttest quasi-experiment conducted in the field (N = 922) to determine whether and how a media literacy curriculum addressing sexual portrayals in the media would influence adolescents' decision-making processes regarding sex. Results of the evaluation, based on the Message Interpretation Process Model, indicated that participants who received media literacy training better understood that media influence teens' decision making about sex and were more likely to report that sexual depictions in the media are inaccurate and glamorized. In addition, participants who received media literacy lessons were more likely than were control group participants to believe that other teens practice abstinence and reported a greater ability to resist peer pressure. An interaction effect existed between gender and condition on attitudes toward abstinence, suggesting that the lessons helped girls and boys in somewhat different ways. Overall, the results indicated that media literacy strengthened key aspects of participants' logic-oriented decision-making process.

  13. Health-related media use among youth audiences in Senegal.

    PubMed

    Glik, Deborah; Massey, Philip; Gipson, Jessica; Dieng, Thierno; Rideau, Alexandre; Prelip, Michael

    2016-03-01

    Lower- and middle-income countries (LMICs) are experiencing rapid changes in access to and use of new internet and digital media technologies. The purpose of this study was to better understand how younger audiences are navigating traditional and newer forms of media technologies, with particular emphasis on the skills and competencies needed to obtain, evaluate and apply health-related information, also defined as health and media literacy. Sixteen focus group discussions were conducted throughout Senegal in September 2012 with youth aged 15-25. Using an iterative coding process based on grounded theory, four themes emerged related to media use for health information among Senegalese youth. They include the following: (i) media utilization; (ii) barriers and conflicts regarding media utilization; (iii) uses and gratifications and (iv) health and media literacy. Findings suggest that Senegalese youth use a heterogeneous mix of media platforms (i.e. television, radio, internet) and utilization often occurs with family members or friends. Additionally, the need for entertainment, information and connectedness inform media use, mostly concerning sexual and reproductive health information. Importantly, tensions arise as youth balance innovative and interactive technologies with traditional and conservative values, particularly concerning ethical and privacy concerns. Findings support the use of multipronged intervention approaches that leverage both new media, as well as traditional media strategies, and that also address lack of health and media literacy in this population. Implementing health-related interventions across multiple media platforms provides an opportunity to create an integrated, as opposed to a disparate, user experience.

  14. Health-related media use among youth audiences in Senegal

    PubMed Central

    Glik, Deborah; Massey, Philip; Gipson, Jessica; Dieng, Thierno; Rideau, Alexandre; Prelip, Michael

    2016-01-01

    Lower- and middle-income countries (LMICs) are experiencing rapid changes in access to and use of new internet and digital media technologies. The purpose of this study was to better understand how younger audiences are navigating traditional and newer forms of media technologies, with particular emphasis on the skills and competencies needed to obtain, evaluate and apply health-related information, also defined as health and media literacy. Sixteen focus group discussions were conducted throughout Senegal in September 2012 with youth aged 15–25. Using an iterative coding process based on grounded theory, four themes emerged related to media use for health information among Senegalese youth. They include the following: (i) media utilization; (ii) barriers and conflicts regarding media utilization; (iii) uses and gratifications and (iv) health and media literacy. Findings suggest that Senegalese youth use a heterogeneous mix of media platforms (i.e. television, radio, internet) and utilization often occurs with family members or friends. Additionally, the need for entertainment, information and connectedness inform media use, mostly concerning sexual and reproductive health information. Importantly, tensions arise as youth balance innovative and interactive technologies with traditional and conservative values, particularly concerning ethical and privacy concerns. Findings support the use of multipronged intervention approaches that leverage both new media, as well as traditional media strategies, and that also address lack of health and media literacy in this population. Implementing health-related interventions across multiple media platforms provides an opportunity to create an integrated, as opposed to a disparate, user experience. PMID:25113152

  15. Medical ethics in the media.

    PubMed

    Raman, Usha

    2009-01-01

    The mass media function both as reflector and a shaper of a society's attitudes and values and as such represent a forum within which one may understand and influence public opinion. While questions of medical ethics may be largely confined to academic and scientific spaces, their importance to society at large cannot be denied, and how issues of medical ethics play out--if at all--in the media could tell us how society understands and processes these questions. This paper uses the techniques of framing analysis and textual analysis to examine how the print media, represented by two major Indian newspapers, cover medical ethics. The study looked at all articles related to medical research over a three-month period (January-March 2007) and considered how the story was framed, what were the key threads followed, and the dominant themes focused on. The ethical frame is notable by its absence, even in articles related to controversial themes such as drug research and genetics. Discussion of ethics appears to be problematic given the adherence to traditional "news values" when covering science and medicine. The research community and the media need to pay more attention to explicitly focusing on ethics in their interactions.

  16. Pervasive media violence.

    PubMed

    Schooler, C; Flora, J A

    1996-01-01

    In this review, we focus our discussion on studies examining effects on children and young adults. We believe that the current epidemic of youth violence in the United States justifies a focus on this vulnerable segment of society. We consider media effects on individual children's behaviors, such as imitating aggressive acts. In addition, we examine how the media influence young people's perceptions of norms regarding interpersonal relationships. Next, we assess mass media effects on societal beliefs, or what children and adolescents think the "real world" is like. We suggest these media influences are cumulative and mutually reinforcing, and discuss the implications of repeated exposure to prominent and prevalent violent media messages. Finally, we catalog multiple intervention possibilities ranging from education to regulation. From a public health perspective, therefore, we evaluate the effects that pervasive media messages depicting violence have on young people and present multiple strategies to promote more healthful outcomes.

  17. Ubiquitous Media for Collocated Interaction

    NASA Astrophysics Data System (ADS)

    Jacucci, Giulio; Peltonen, Peter; Morrison, Ann; Salovaara, Antti; Kurvinen, Esko; Oulasvirta, Antti

    Has ubiquitous computing entered our lives as anticipated in the early 90s or at the turn of the millennium? In this last decade, the processing of media combined with sensing and communication capabilities has been slowly entering our lives through powerful smartphones, multimodal game consoles, instrumented cars, and large displays pervading public spaces. However, the visionary formulations (Weiser 1991) and updated scenarios (Abowd and Mynatt 2000) have not been realized, despite the fact that the technology has become increasingly accessible.

  18. Improving DoD Energy Efficiency: Combining MMOWGLI Social-Media Brainstorming with Lexical Link Analysis (LLA) to Strengthen the Defense Acquisition Process

    DTIC Science & Technology

    2013-04-01

    from MIT and co-founded Quantum Intelligence, Inc. She has been a principal investigator (PI) for six DoD Small Business Innovation Research (SBIR... consciously and consistently.  Following a series of deliberate experiments, long-term procedural improvements to the formal milestone acquisition process

  19. Division Level Social Media

    DTIC Science & Technology

    2015-06-12

    operating budget. The social media manager or group is responsible for posting pictures, stories, and links to social media pages. Every divisional unit...09-026– Responsible and Effective Use of Internet-based Capabilities; 5. Army’s Slide Share– Social Media Round Up. The U.S. Army Public Affairs...Officer is responsible for safeguarding information and government organizations and those who work for it. It is the first enclosure of the Social

  20. Poly(ethylene imine)-based granular sorbents by a new process of templated gel-filling. High capacity and selectivity of copper sorption in acidic and alkaline media

    SciTech Connect

    Chanda, M.; Rempel, G.L.

    1995-08-01

    A new process has been developed for making granular gel-type sorbents from chelating resins using metal ion as template. Named as templated gel-filling, the process uses the chosen metal as templating host ion on high-surface-area silica to build a templated gel layer from a solution of the chelating resin in a suitable solvent in which the resin is soluble but its metal complex is insoluble. After cross-linking the templated gel layer, the silica support is removed by alkali to produce a hollow shell of the templated gel. The shells are then soaked in a concentrated aqueous solution of the same metal ion and suspended in the same resin solution to afford gel-filling. The shells thus filled with metal-templated gel are treated with cross-linking agent, followed by acid to remove the template ion and activate the resin for metal sorption. Poly(ethyleneimine) and its partially ethylated derivative have been used to produce granular gel-type sorbents by this process, with Cu(II) as the template ion. These sorbents are found to offer high capacity and selectivity for copper over nickel, cobalt, and zinc in both acidic and alkaline media. Containing a relatively high fraction of imbibed water, the sorbents exhibit markedly enhanced rate behavior, in both sorption and stripping.

  1. Media usage as health segmentation variables.

    PubMed

    Rodgers, Shelly; Chen, Qimei; Duffy, Margaret; Fleming, Kenneth

    2007-03-01

    The purpose of this research is to contrast a traditional audience segmentation model that uses demographics and health evaluations against a model that uses these same variables plus media usage variables. The goal was to determine whether media usage variables - typically not used in health segmentation studies - add predictive power in determining health behaviors and attitudes. The results of the analysis showed an increase in the ability to predict health behaviors such as aspirin use, vitamin use, diet, and exercise, and suggest that there is predictive value for including media variables as part of the segmentation process. Implications for public health education and campaign planning are discussed.

  2. Overview: new media.

    PubMed

    O'Keeffe, Gwenn Schurgin

    2012-06-01

    Pediatricians care for children's growth and development from the time they are born until they become adults. In addition, pediatricians must be vigilant for external influences. Technology influences children of all ages. Seventy-five percent of teenagers own cell phones, with 25% using them for social media. Technology can lead to an increase in skills and social benefits but there is also the potential for harm such as sexting, cyberbullying, privacy issues, and Internet addiction, all of which can affect health. Pediatricians must become well versed in the new media to provide media-oriented anticipatory guidance and advice on media-related issues.

  3. Electrolytic recycling of a carbonate salt in a process with a dissolution of spent nuclear fuel in a strong alkaline carbonate media

    SciTech Connect

    Kwang-Wook Kim; In-Tae Kim; Seong-Min Kim; Yeon-Hwa Kim; Eil-Hee Lee; Kwang-Yong Jee

    2007-07-01

    A removal of only uranium from spent nuclear fuel with the concepts of a high proliferation-resistance and a minimal generation of waste is helpful for a spent fuel management in view of a volume reduction of the high level radioactive waste generated from the spent fuel treatment. That can be accomplished by a process using a selective oxidative dissolution of the spent fuel in a carbonate solution of high alkalinity. In this work, an electrolytic method for a de-carbonation and a recovery of CO{sub 2} for recycling the used carbonate solution contaminated with some impurity metal ions generated in such a process with a concept of zero-release of waste solution was studied. A carbonate solution generated from such a system was confirmed to be completely recycled within the system, while the impurity ions being separated from the carbonate solution. (authors)

  4. Political Change in Eastern Europe and Conceptual Approaches to Media Communication: A Critique.

    ERIC Educational Resources Information Center

    Downing, John

    1994-01-01

    Discusses media-related changes in Russia, Poland, and Hungary since the 1980s. Reviews current media theories in the United States for their ability to guide research into media processes in these three countries. Finds that much media research has paid insufficient attention to economic forces, international relations, the state, political…

  5. The Analysis of Detective Genre in Media Studies in the Student Audience

    ERIC Educational Resources Information Center

    Fedorov, Alexander

    2011-01-01

    Development of skills for the critical analysis of media texts--an important task of media education. However, media literacy practice shows that students have the problems with the discussion/analysis of entertainment genres in the early stages of media studies, for example, the difficulties in the process of understanding and interpreting the…

  6. Practicing Critical Media Literacy Education: Developing a Community of Inquiry among Teachers Using Popular Culture

    ERIC Educational Resources Information Center

    Flores-Koulish, Stephanie

    2010-01-01

    Media literacy compels us to look anew at the most mundane, that which surrounds us: the media and our popular culture. From there media literacy compels us to accept that the media are constructed and to seek various ways to analyze them, while considering our own beliefs to evaluate for ourselves an ultimate interpretation. This process has the…

  7. Media Education and Native Peoples.

    ERIC Educational Resources Information Center

    Greer, Sandy

    1991-01-01

    Media literacy encourages critical thinking about the news media, advertising, and popular culture. Media education of American Indian students challenges mass media's stereotyped aboriginal representations and the mainstream values of egotism and consumerism. Integrated across the curriculum at all grades, media education is empowering and…

  8. Tungsten - Tungsten Trioxide Electrodes for the Long-term Monitoring of Corrosion Processes in Highly Alkaline Media and Concrete-based Materials.

    PubMed

    Kolar, Mitja; Doliška, Aleš; Svegl, Franc; Kalcher, Kurt

    2010-12-01

    The determination of pH in highly alkaline solutions and concrete materials is extremely important for monitoring or predicting the corrosion processes of reinforced concrete structures and to follow the hydration process of Portland cement, fly-ash, micro silica and other materials used in concrete manufacturing. The corrosion of reinforced concrete structures and the hydration of pozzolanic materials are long-term processes, which means, that appropriate durable, and resilient pH electrodes are needed, for direct implantation regarding solid concrete bodies. The purpose of this work was to characterise the potentiometric and surface properties of tungsten electrodes after exposure to extreme alkaline solutions. The tungsten wire surface was activated at 800 °C for 30 min within an oxygen flow. The formation of homogenous and compact multiple layers of WO3 crystals was observed using X-ray diffraction and scanning electron microscopy. X-ray diffraction of those tungsten electrodes exposed to saturated calcium hydroxide solution or the pore-water of cement-based materials during 10 months, indicated partly dissolved WO3. Two new compounds appeared on the electrodes surfaces; pure tungsten and CaWO4. The presence of tungsten was affecting any potentiometric response in acidic pH region (2-5) but in pH 5-12 region the response still remained linear with a slope of 42 ± 2 mV/pH unit. The W/WO3 electrode was suitable for the long-term monitoring of corrosion processes in concrete-based materials according to the pH changes as it has stable and repeatable responses to alkaline solutions (pH > 12). All the tested interferring ions had no significant influence on electrode potential. The W/WO3 electrode is simple, robust, inexpensive, and temperature resistant and can be applied in potentiometric titrations as well as in batch and flow-injection analysis. The prepared electrode is a highly promising pH sensor for the monitoring of pH changes in highly alkaline capillary

  9. Degradation of antidepressant drug fluoxetine in aqueous media by ozone/H2O2 system: process optimization using central composite design.

    PubMed

    Aghaeinejad-Meybodi, Abbas; Ebadi, Amanollah; Shafiei, Sirous; Khataee, Alireza; Rostampour, Mohammad

    2015-01-01

    The main objective of this work is the modelling and optimization of antidepressant drug fluoxetine degradation in aqueous solution by ozone/H2O2 process using central composite design. The operational parameters were ozone concentration, initial hydrogen peroxide concentration, reaction time and initial fluoxetine concentration. A good agreement between the predicted values of fluoxetine removal and experimental results were observed (R2=0.976 and Adj-R2=0.955). Pareto analysis indicated that all selected factors and some interactions were effective on the removal efficiency. It was found that the reaction time is the most effective parameter in the ozone/H2O2 process. The maximum removal efficiency (86.14%) was achieved at ozone concentration of 30 mg L(-1), initial H2O2 concentration of 0.02 mM, reaction time of 20 min and initial fluoxetine concentration of 50 mg L(-1) as the optimum conditions.

  10. The Influence of Media Violence on Youth.

    PubMed

    Anderson, Craig A; Berkowitz, Leonard; Donnerstein, Edward; Huesmann, L Rowell; Johnson, James D; Linz, Daniel; Malamuth, Neil M; Wartella, Ellen

    2003-12-01

    Research on violent television and films, video games, and music reveals unequivocal evidence that media violence increases the likelihood of aggressive and violent behavior in both immediate and long-term contexts. The effects appear larger for milder than for more severe forms of aggression, but the effects on severe forms of violence are also substantial (r = .13 to .32) when compared with effects of other violence risk factors or medical effects deemed important by the medical community (e.g., effect of aspirin on heart attacks). The research base is large; diverse in methods, samples, and media genres; and consistent in overall findings. The evidence is clearest within the most extensively researched domain, television and film violence. The growing body of video-game research yields essentially the same conclusions. Short-term exposure increases the likelihood of physically and verbally aggressive behavior, aggressive thoughts, and aggressive emotions. Recent large-scale longitudinal studies provide converging evidence linking frequent exposure to violent media in childhood with aggression later in life, including physical assaults and spouse abuse. Because extremely violent criminal behaviors (e.g., forcible rape, aggravated assault, homicide) are rare, new longitudinal studies with larger samples are needed to estimate accurately how much habitual childhood exposure to media violence increases the risk for extreme violence. Well-supported theory delineates why and when exposure to media violence increases aggression and violence. Media violence produces short-term increases by priming existing aggressive scripts and cognitions, increasing physiological arousal, and triggering an automatic tendency to imitate observed behaviors. Media violence produces long-term effects via several types of learning processes leading to the acquisition of lasting (and automatically accessible) aggressive scripts, interpretational schemas, and aggression-supporting beliefs

  11. Fabrication of magnetic nanodot arrays for patterned magnetic recording media.

    PubMed

    Sato, Hirotaka; Homma, Takayuki

    2007-01-01

    Fabrication processes of arrayed magnetic nanodots for the use of patterned magnetic recording media were reviewed. One candidate for the patterned media is ordered assemble of magnetic nanoparticles, and the other is patterned magnetic thin films fabricated using various micro/nano scale machining processes. For the formation of patterned masks and molds, lithography processes as well as self-organized pattern formation are utilized. For the deposition processes of magnetic dots, electrochemical deposition processes were widely used. These fabrication processes are reviewed mainly from recent reports. The recording systems for the patterned media including probe-type-recording are also overviewed.

  12. Digital Media and Learning

    ERIC Educational Resources Information Center

    John D. and Catherine T. MacArthur Foundation, 2012

    2012-01-01

    MacArthur launched the digital media and learning initiative in 2006 to explore how digital media are changing the way young people learn, socialize, communicate, and play. Since 2006, the Foundation has awarded grants totaling more than $100 million for research, development of innovative new technologies, new learning environments for youth,…

  13. Photonic layered media

    DOEpatents

    Fleming, James G.; Lin, Shawn-Yu

    2002-01-01

    A new class of structured dielectric media which exhibit significant photonic bandstructure has been invented. The new structures, called photonic layered media, are easy to fabricate using existing layer-by-layer growth techniques, and offer the ability to significantly extend our practical ability to tailor the properties of such optical materials.

  14. EMMSE Media Index.

    ERIC Educational Resources Information Center

    Hewitt, Clifford A., Comp.; McKinstry, Herbert A., Comp.

    This index provides a topical taxonomy of media which have been selected for their relevance in the teaching of materials science and engineering. The index is keyed to a matrix which matches topical and/or class material with six classifications of media: print, 16mm film, super 8 film, slide/tape, videotape, and other (including interactive…

  15. Computer Produced Media Guides.

    ERIC Educational Resources Information Center

    Jeffcott, Janet B.

    To increase access to the media collection at the Madison Area Technical College (Wisconsin) a computer-produced key work index was created using an International Business Machine (IBM) 360 model 40 computer and a duplicating facility with offset capability. A standard 80 column IBM card was used reserving columns 1-9 for the media item number,…

  16. Minorities in the Media.

    ERIC Educational Resources Information Center

    Sherard, Regina G., Comp.; And Others

    The four reports in this compilation focus on the role of blacks in the various media. The first report provides a general discussion of the status of blacks in the media, and notes that it has been largely analogous to their political and economic development. The second report traces the changing image of blacks as it has been portrayed on…

  17. Trends in Media Use

    ERIC Educational Resources Information Center

    Roberts, Donald F.; Foehr, Ulla G.

    2008-01-01

    American youth are awash in media. They have television sets in their bedrooms, personal computers in their family rooms, and digital music players and cell phones in their backpacks. They spend more time with media than any single activity other than sleeping, with the average American eight- to eighteen-year-old reporting more than six hours of…

  18. Social Media. Research Brief

    ERIC Educational Resources Information Center

    Williamson, Ronald

    2010-01-01

    The growing use of social media by students and adults is impacting schools. A recent Pew study found that 73% of teens use social-networking sites to connect with others. Social media includes blogs, wikis, and podcasts as well as sites such as MySpace, Facebook, and Linkedin. While such sites promote connection with others, their use has created…

  19. News Media Industry

    DTIC Science & Technology

    2007-01-01

    convergence of media types, rapidly evolving technology, changing consumer behavior , and traditionalists ensconced in the ways of the past all...changing consumer behavior have all contributed to uncertain times for these media icons. Newspaper readership and subscriptions levels continue to...consistently center on changing technologies, corporate pressures, changing consumer behavior and revenue generation (advertising). Because it’s

  20. The Media Gospel.

    ERIC Educational Resources Information Center

    Christians, Clifford G.; Fortner, Robert S.

    1981-01-01

    Examines four recent books on the religious media: Ben Armstrong's "The Electric Church," James F. Engel's "Contemporary Christian Communications: Its Theory and Practice," Malcolm Muggeridge's "Christ and the Media," and Virginia Stem Owens'"The Total Image: or Selling Jesus in the Modern Age." Evaluates…

  1. Advertising Pressures on Media.

    ERIC Educational Resources Information Center

    Hammitt, Harry

    The majority of the media in the United States is funded through revenues derived from the sale of advertising space. The problem that arises from this situation is fundamentally an economic one: if advertisers are paying the bills for the media, how much control over content should they have? This report offers a review of instances in which…

  2. Accessing the Media.

    ERIC Educational Resources Information Center

    Parker, Judy

    This guide for school districts offers a quick outline for developing good communications skills and public relations with news media personnel. Guidelines for good press relations are provided that emphasize the importance of keeping two-way, open communications with the media, with attention to: accuracy; being prepared; sharing the bad news as…

  3. Writing and Digital Media

    ERIC Educational Resources Information Center

    van Waes, Luuk, Ed.; Leijten, Marielle, Ed.; Neuwirth, Chris, Ed.

    2006-01-01

    Digital media has become an increasingly powerful force in modern society. This volume brings together outstanding European, American and Australian research in "writing and digital media" and explores its cognitive, social and cultural implications. In addition to presenting programs of original research by internationally known…

  4. Literacy, Learning, and Media.

    ERIC Educational Resources Information Center

    Adams, Dennis; Hamm, Mary

    2000-01-01

    Considers the expanding definition of literacy from traditional reading and writing skills to include technological, visual, information, and networking literacy. Discusses the impact of media on social interactions and intellectual development; linking technology to educational goals; influences of new media symbol systems on communication;…

  5. Media: Eyeing the News.

    ERIC Educational Resources Information Center

    Gage, Susan

    1990-01-01

    This issue of "Teachergram" addresses media-related issues such as the kind of world picture Canadians receive from mainstream media, the ability of television to describe the complexity of world events, and the claim of distorted and simplistic portrayal of developing nations. Students are encouraged critical perspective--to help them…

  6. Folk Media in Development.

    ERIC Educational Resources Information Center

    Instructional Technology Report, 1975

    1975-01-01

    This issue is dedicated to folk media. Using Indonesia for his case study, Dr. Nat Colletta analyzes traditional culture as a medium for development. Juan Diaz Bordenave expresses doubts about adapting folk media to development objectives; Susan Hostetler and Arthur Gillette report on uses of the theater to promote development objectives; and…

  7. Remodeling the Media Center.

    ERIC Educational Resources Information Center

    Baule, Steven M.

    1998-01-01

    Discusses items that need to be considered when remodeling a school media center. Highlights include space and location for various functions, including projections of print versus electronic media; electrical and data wiring needs; lighting; security and supervision; and reuse of existing furniture and equipment. (LRW)

  8. Building Social Media Connections

    ERIC Educational Resources Information Center

    Ferriter, William N.; Ramsden, Jason T.; Sheninger, Eric C.

    2012-01-01

    Incorporating social media tools into your professional practices does not have to be intimidating as long as you are willing to tackle five action steps. It is far easier to articulate the strengths--and to imagine the possibilities--of social media spaces as tools for communication and professional development when you are actively using those…

  9. Working with News Media.

    ERIC Educational Resources Information Center

    Grosenbaugh, Dick

    To work effectively with personnel in the news media, one needs to assist them in doing their job by getting accurate information to them (in plenty of time for their deadline) and in providing information about meetings (when they do not have a reporter to cover the event). Familiarity aids in communication with news media personnel so one should…

  10. Wisconsin Ideas in Media.

    ERIC Educational Resources Information Center

    Holmes, Rose, Ed.; And Others

    1983-01-01

    These two documents contain a variety of articles on media use in education. The first provides 16 articles that focus on justifying media programs in the 1980's. Topics include selling your program to administrators; reorganization of the Wisconsin Department of Public Instruction; video literacy; student-made videotape recordings; interactive…

  11. Social Justice and Media. Media Corner.

    ERIC Educational Resources Information Center

    Braun, Joseph A., III, Ed.

    1994-01-01

    Contends that the end of slavery, women's suffrage, and the civil rights movement were watershed events of social justice in U.S. history. Provides reviews of two media-based sets of instructional materials that can help students understand the struggle by disenfranchised groups to become full participants in society. (CFR)

  12. Media Roles and Legislators' New Media Use.

    ERIC Educational Resources Information Center

    Riffe, Daniel

    1990-01-01

    Surveys 82 Alabama legislators and finds officials' views of the press as adversary or agent of consensus relates to perceived value of media for job-relevant information. Suggests a dysfunction of the "watch-dog" role because those believing the consensus model found the press more useful than those seeing the press as an adversary. (MG)

  13. Capillary fracturing in granular media.

    PubMed

    Holtzman, Ran; Szulczewski, Michael L; Juanes, Ruben

    2012-06-29

    We study the displacement of immiscible fluids in deformable, noncohesive granular media. Experimentally, we inject air into a thin bed of water-saturated glass beads and observe the invasion morphology. The control parameters are the injection rate, the bead size, and the confining stress. We identify three invasion regimes: capillary fingering, viscous fingering, and "capillary fracturing," where capillary forces overcome frictional resistance and induce the opening of conduits. We derive two dimensionless numbers that govern the transition among the different regimes: a modified capillary number and a fracturing number. The experiments and analysis predict the emergence of fracturing in fine-grained media under low confining stress, a phenomenon that likely plays a fundamental role in many natural processes such as primary oil migration, methane venting from lake sediments, and the formation of desiccation cracks.

  14. Capillary Fracturing in Granular Media

    NASA Astrophysics Data System (ADS)

    Holtzman, Ran; Szulczewski, Michael L.; Juanes, Ruben

    2012-06-01

    We study the displacement of immiscible fluids in deformable, noncohesive granular media. Experimentally, we inject air into a thin bed of water-saturated glass beads and observe the invasion morphology. The control parameters are the injection rate, the bead size, and the confining stress. We identify three invasion regimes: capillary fingering, viscous fingering, and “capillary fracturing,” where capillary forces overcome frictional resistance and induce the opening of conduits. We derive two dimensionless numbers that govern the transition among the different regimes: a modified capillary number and a fracturing number. The experiments and analysis predict the emergence of fracturing in fine-grained media under low confining stress, a phenomenon that likely plays a fundamental role in many natural processes such as primary oil migration, methane venting from lake sediments, and the formation of desiccation cracks.

  15. Media Accounts of School Performance: Reinforcing Dominant Practices of Accountability

    ERIC Educational Resources Information Center

    Baroutsis, Aspa

    2016-01-01

    Media reportage often act as interpretations of accountability policies thereby making the news media a part of the policy enactment process. Within such a process, their role is that of policy reinforcement rather than policy construction or contestation. This paper draws on the experiences of school leaders in regional Queensland, Australia, and…

  16. Novel process of bio-chemical ammonia removal from air streams using a water reflux system and zeolite as filter media.

    PubMed

    Vitzthum von Eckstaedt, Sebastian; Charles, Wipa; Ho, Goen; Cord-Ruwisch, Ralf

    2016-02-01

    A novel biofilter that removes ammonia from air streams and converts it to nitrogen gas has been developed and operated continuously for 300 days. The ammonia from the incoming up-flow air stream is first absorbed into water and the carrier material, zeolite. A continuous gravity reflux of condensed water from the exit of the biofilter provides moisture for nitrifying bacteria to develop and convert dissolved ammonia (ammonium) to nitrite/nitrate. The down-flow of the condensed water reflux washes down nitrite/nitrate preventing ammonium and nitrite/nitrate accumulation at the top region of the biofilter. The evaporation caused by the inflow air leads to the accumulation of nitrite to extremely high concentrations in the bottom of the biofilter. The high nitrite concentrations favour the spontaneous chemical oxidation of ammonium by nitrite to nitrogen (N2). Tests showed that this chemical reaction was catalysed by the zeolite filter medium and allowed it to take place at room temperature. This study shows that ammonia can be removed from air streams and converted to N2 in a fully aerated single step biofilter. The process also overcomes the problem of microorganism-inhibition and resulted in zero leachate production.

  17. MediaTracker system

    SciTech Connect

    Sandoval, D. M.; Strittmatter, R. B.; Abeyta, J. D.; Brown, J.; Marks, T. , Jr.; Martinez, B. J.; Jones, D. B.; Hsue, W.

    2004-01-01

    The initial objectives of this effort were to provide a hardware and software platform that can address the requirements for the accountability of classified removable electronic media and vault access logging. The Media Tracker system software assists classified media custodian in managing vault access logging and Media Tracking to prevent the inadvertent violation of rules or policies for the access to a restricted area and the movement and use of tracked items. The MediaTracker system includes the software tools to track and account for high consequence security assets and high value items. The overall benefits include: (1) real-time access to the disposition of all Classified Removable Electronic Media (CREM), (2) streamlined security procedures and requirements, (3) removal of ambiguity and managerial inconsistencies, (4) prevention of incidents that can and should be prevented, (5) alignment with the DOE's initiative to achieve improvements in security and facility operations through technology deployment, and (6) enhanced individual responsibility by providing a consistent method of dealing with daily responsibilities. In response to initiatives to enhance the control of classified removable electronic media (CREM), the Media Tracker software suite was developed, piloted and implemented at the Los Alamos National Laboratory beginning in July 2000. The Media Tracker software suite assists in the accountability and tracking of CREM and other high-value assets. One component of the MediaTracker software suite provides a Laboratory-approved media tracking system. Using commercial touch screen and bar code technology, the MediaTracker (MT) component of the MediaTracker software suite provides an efficient and effective means to meet current Laboratory requirements and provides new-engineered controls to help assure compliance with those requirements. It also establishes a computer infrastructure at vault entrances for vault access logging, and can accommodate

  18. Adapting Behavioral Interventions for Social Media Delivery

    PubMed Central

    Waring, Molly E; May, Christine N; Ding, Eric Y; Kunz, Werner H; Hayes, Rashelle; Oleski, Jessica L

    2016-01-01

    Patients are increasingly using online social networks (ie, social media) to connect with other patients and health care professionals—a trend called peer-to-peer health care. Because online social networks provide a means for health care professionals to communicate with patients, and for patients to communicate with each other, an opportunity exists to use social media as a modality to deliver behavioral interventions. Social media-delivered behavioral interventions have the potential to reduce the expense of behavioral interventions by eliminating visits, as well as increase our access to patients by becoming embedded in their social media feeds. Trials of online social network-delivered behavioral interventions have shown promise, but much is unknown about intervention development and methodology. In this paper, we discuss the process by which investigators can translate behavioral interventions for social media delivery. We present a model that describes the steps and decision points in this process, including the necessary training and reporting requirements. We also discuss issues pertinent to social media-delivered interventions, including cost, scalability, and privacy. Finally, we identify areas of research that are needed to optimize this emerging behavioral intervention modality. PMID:26825969

  19. Adapting Behavioral Interventions for Social Media Delivery.

    PubMed

    Pagoto, Sherry; Waring, Molly E; May, Christine N; Ding, Eric Y; Kunz, Werner H; Hayes, Rashelle; Oleski, Jessica L

    2016-01-29

    Patients are increasingly using online social networks (ie, social media) to connect with other patients and health care professionals--a trend called peer-to-peer health care. Because online social networks provide a means for health care professionals to communicate with patients, and for patients to communicate with each other, an opportunity exists to use social media as a modality to deliver behavioral interventions. Social media-delivered behavioral interventions have the potential to reduce the expense of behavioral interventions by eliminating visits, as well as increase our access to patients by becoming embedded in their social media feeds. Trials of online social network-delivered behavioral interventions have shown promise, but much is unknown about intervention development and methodology. In this paper, we discuss the process by which investigators can translate behavioral interventions for social media delivery. We present a model that describes the steps and decision points in this process, including the necessary training and reporting requirements. We also discuss issues pertinent to social media-delivered interventions, including cost, scalability, and privacy. Finally, we identify areas of research that are needed to optimize this emerging behavioral intervention modality.

  20. Media violence and youth.

    PubMed

    Beresin, E V

    1999-06-01

    This column reviews the literature on violence in the media and its effects on youth. The author summarizes the findings of naturalistic, longitudinal, and population-based studies conducted over the last 30 years. The literature provides compelling evidence that exposure of media violence to children plays a major role in the etiology of aggressive behavior. Psychiatrists can facilitate primary prevention of violence in our society by discussing the problem of media violence with parents, medical students, residents, and allied health and school professionals.

  1. Magnetohydrodynamics of fractal media

    SciTech Connect

    Tarasov, Vasily E.

    2006-05-15

    The fractal distribution of charged particles is considered. An example of this distribution is the charged particles that are distributed over the fractal. The fractional integrals are used to describe fractal distribution. These integrals are considered as approximations of integrals on fractals. Typical turbulent media could be of a fractal structure and the corresponding equations should be changed to include the fractal features of the media. The magnetohydrodynamics equations for fractal media are derived from the fractional generalization of integral Maxwell equations and integral hydrodynamics (balance) equations. Possible equilibrium states for these equations are considered.

  2. Ethics and social media.

    PubMed

    Milton, Constance L

    2014-10-01

    Nurses' use of social media has increased significantly with growing numbers of media-sharing opportunities, platforms, and emerging forms of electronic applications. With the proliferation, opportunities and limitations surface regarding the responsibilities and accountability that nurses have in choosing technology applications with an embedded philosophical ethos that is consistent with the discipline's societal mandate of serving humankind in ways that honor human dignity. This article begins a discussion addressing possible disciplinary obligations and responsibilities for the implementation of social media platforms and possible implications for its future use in the discipline of nursing.

  3. Teaching Media-Savvy Students about the Popular Media

    ERIC Educational Resources Information Center

    Maness, Kevin

    2004-01-01

    A framework for media education that helps students enhance their understanding of the media and use their knowledge to influence individual and community action is proposed. It is experienced that the problem with educating children against, rather than about, the media is the assumption that students are passive audiences of the media, lacking…

  4. Mixed-Media Owls

    ERIC Educational Resources Information Center

    Schultz, Kathy

    2010-01-01

    The fun of creating collages is there are unlimited possibilities for the different kinds of materials one can use. In this article, the author describes how her eighth-grade students created an owl using mixed media.

  5. TECHNETIUM SORPTION MEDIA REVIEW

    SciTech Connect

    DUNCAN JB; KELLY SE; ROBBINS RA; ADAMS RD; THORSON MA; HAASS CC

    2011-08-25

    This report presents information and references to aid in the selection of 99Tc sorption media for feasibility studies regarding the removal of 99Tc from Hanford's low activity waste. The report contains literature search material for sorption media (including ion exchange media) for the most tested media to date, including SuperLig 639, Reillex HPQ, TAM (Kruion), Purolite A520E and A530E, and Dowex 1X8. The U.S. Department of Energy (DOE), Office of River Protection (ORP) is responsible for management and completion of the River Protection Project (RPP) mission, which comprises both the Hanford Site tank farms and the Waste Treatment and Immobilization Plant (WTP). The RPP mission is to store, retrieve and treat Hanford's tank waste; store and dispose of treated wastes; and close the tank farm waste management areas and treatment facilities in a safe, environmentally compliant, cost-effective and energy-effective manner.

  6. Congressional and Media Protocols

    EPA Pesticide Factsheets

    The OIG's Office of Congressional and Public Affairs is the primary point of contact for all media and congressional inquiries on matters related to the OIG, which ensures that they are handled expeditiously.

  7. Media independent interface

    NASA Technical Reports Server (NTRS)

    1987-01-01

    The work done on the Media Independent Interface (MII) Interface Control Document (ICD) program is described and recommendations based on it were made. Explanations and rationale for the content of the ICD itself are presented.

  8. Communications and media services

    NASA Technical Reports Server (NTRS)

    Mcculla, James W.; Kukowski, James F.

    1990-01-01

    NASA's internal and external communication methods are reviewed. NASA information services for the media, for the public, and for employees are discussed. Consideration is given to electron information distribution, the NASA TV-audio system, the NASA broadcast news service, astronaut appearances, technology and information exhibits, speaker services, and NASA news reports for internal communications. Also, the NASA worldwide electronic mail network is described and trends for future NASA communications and media services are outlined.

  9. Social Media Behind the Firewall Promote Army-Wide Collaboration

    DTIC Science & Technology

    2012-01-01

    Social media use is changing the way service members complete their missions and Department of Defense leaders are taking notice. General officers...share. Underlying it all is milSuite, a collection of user-friendly knowledge management tools mirroring popular social media platforms but located...hundreds, if not thousands, of processes that can be made more efficient by harnessing secure social media .

  10. Media and technology in adolescent sexual education and safety.

    PubMed

    Harris, Allyssa L

    2011-01-01

    Media play an important role in the lives of adolescents, providing them with opportunities for education and socialization. Media content is increasingly permeated with violence and sexual references that can be highly influential as adolescents continue the developmental process. Providing patient education is one of the cornerstones of nursing practice, and nurses are ideally suited to affect adolescent and parental education about the sexual and violent content of media.

  11. Media preparation and bacteriological tools.

    PubMed

    Elbing, Karen; Brent, Roger

    2002-08-01

    Recipes are provided in this unit for minimal liquid media, rich liquid media, solid media, top agar, and stab agar. Also included are descriptions and useful information about tools used with growth media such as inoculating loops, sterile toothpicks and spreaders.

  12. Media Education: An Indian Perspective.

    ERIC Educational Resources Information Center

    Kumar, Keval Joe

    This paper provides both a preliminary analysis of a survey on media education in India, and reviews of the research on media education in the western world, the limited media education research already done in India, and the more extensive research that has been done on the sociology of Indian youth and the media. The purpose of the survey was to…

  13. Mass Media as Community Educators.

    ERIC Educational Resources Information Center

    Brookfield, Stephen D.

    1990-01-01

    Despite the image of the pernicious effects of mass media, media consumers are not passive receptors of media-generated beliefs and ideas. Educators can help adults become media literate by helping them decode, filter, and interpret the messages they read, see, and hear through content and context analysis. (SK)

  14. Media Services and Captioned Films

    ERIC Educational Resources Information Center

    Norwood, Malcolm J.

    1972-01-01

    Described are organizational changes which brought the Clearinghouse for Exceptional Children, Regional Media Centers for the Deaf, the Educational Media Distribution Center, and the forthcoming National Center for Educational Media and Materials for the Handicapped under the Media Services and Captioned Films Branch of the Division of Educational…

  15. The Economics of Educational Media.

    ERIC Educational Resources Information Center

    Wagner, Leslie

    This guide to the economic analysis of media use in education reviews the evidence on the costs and benefits of educational media and provides a methodology for future decision-making. It includes chapters on establishing a framework for media choice, evaluating the effectiveness of media use, and analyzing costs. The empirical evidence from past…

  16. Sub-Saharan Africa's media and neocolonialism.

    PubMed

    Domatob, J K

    1988-01-01

    Given the heavy Western metropolitan bias of the media in sub-Saharan Africa, the ideology of neocolonialism continues to exert a dominant influence on economic, social, political, and cultural life. This neocolonial influence is further reinforced by advertising that champions a consumerist culture centered around Western goods. The capital of multinational firms plays a crucial role in the strategy of media imperialism. The dramatic growth of monopolies and the creation of military-industrial-information conglomerates in the 1970s and 1980s have been reflected in the international exchange of information and the interlinkage of mass communication systems in sub-Saharan Africa. Another media strategy that reinforces neocolonialism is the use of satellite communication. If cultural autonomy is defined as sub-Saharan Africa's capacity to decide on the allocation of its environmental resources, then cultural synchronization is a massive threat to that autonomy. Few African nations have the resources or expertise necessary to design, establish, or maintain communication systems that could accurately reflect their own culture. Nonetheless, there are some policy options. Personnel can be trained to respect African values and to recognize the dangers of neocolonial domination. The production of indigenous programs could reduce the media's foreign content. The incorporation of traditional drama and dance in the media could enhance this process. Above all, a high degree of planning is necessary if sub-Saharan African states intend to tackle the media and its domination by neocolonialist ideology.

  17. Media and health must forge a partnership.

    PubMed

    Ling, J C

    1986-03-01

    The objective of health for all requires use of all available means--traditional and modern--to reach the population and mobilize communities. The mass media have particular potential for breaking down class barriers and reaching large numbers. However, many media campaigns have been haphazard, without attention to the many determinants of health behavior or other program aspects. Media activity that is not part of a package of programmed activities, including interpersonal follow-up with clearly defined objectives and comprehensive strategy, is ineffective. Media personnel generally recognize their social responsibility in the development process. The media can confer status to a social issue and reinforce social norms. The World Health Organization Expert Committee on Health Education has identified the following roles of the mass media in the field of health: help strengthen political will by appealing to policy makers; raise general health consciousness and clarify options concerning actions that have a strong bearing on health; inform decision makers and the public about the latest developments in the health sciences; help deliver technical health message to the public; and foster community involvement by reflecting public opinion, encouraging dialogue, and facilitating feedback from the community.

  18. Children's media policy.

    PubMed

    Jordan, Amy B

    2008-01-01

    Amy Jordan addresses the need to balance the media industry's potentially important contributions to the healthy development of America's children against the consequences of excessive and age-inappropriate media exposure. Much of the philosophical tension regarding how much say the government should have about media content and delivery stems from the U.S. Constitution's First Amendment protection against government interference in free speech, including commercial speech. Courts, Jordan says, have repeatedly had to weigh the rights of commercial entities to say what they please against the need to protect vulnerable citizens such as children. This balancing act is complicated even further, she says, because many government regulations apply only to broadcast television and not to non-broadcast media such as the Internet or cable television, though Congress has addressed the need to protect children's privacy online. The need to protect both free speech and children has given rise to a fluid media policy mix of federal mandates and industry self-regulation. Jordan describes the role of the three branches of the federal government in formulating and implementing media policy. She also notes the jockeying for influence in policymaking by industry lobbies, child advocacy groups, and academic researchers. The media industry itself, says Jordan, is spurred to self-regulation when public disapproval grows severe enough to raise the possibility of new government action. Jordan surveys a range of government and industry actions, from legislatively required parental monitoring tools, such as the V-Chip blocking device on television sets, to the voluntary industry ratings systems governing television, movies, and video games, to voluntary social website disclosures to outright government bans, such as indecency and child privacy information collection. She considers the success of these efforts in limiting children's exposure to damaging content and in improving parents

  19. Self-Cleaning Particulate Prefilter Media

    NASA Technical Reports Server (NTRS)

    Weber, Olivia; Lalwani, San-jiv; Sharma, Anjal

    2012-01-01

    A long-term space mission requires efficient air revitalization performance to sustain the crew. Prefilter and particulate air filter media are susceptible to rapid fouling that adversely affects their performance and can lead to catastrophic failure of the air revitalization system, which may result in mission failure. For a long-term voyage, it is impractical to carry replacement particulate prefilter and filter modules due to the usual limitations in size, volume, and weight. The only solution to this problem is to reagentlessly regenerate prefilter and filter media in place. A method was developed to modify the particulate prefilter media to allow them to regenerate reagentlessly, and in place, by the application of modest thermocycled transverse or reversed airflows. The innovation may allow NASA to close the breathing air loop more efficiently, thereby sustaining the vision for manned space exploration missions of the future. A novel, self-cleaning coatings technology was developed for air filter media surfaces that allows reagentless in-place regeneration of the surface. The technology grafts thermoresponsive and nonspecific adhesion minimizing polymer nanolayer brush coatings from the prefilter media. These polymer nanolayer brush architectures can be triggered to contract and expand to generate a "pushing-off" force by the simple application of modestly thermocycled (i.e. cycling from ambient cabin temperature to 40 C) air streams. The nonspecific adhesion-minimizing properties of the coatings do not allow the particulate foulants to adhere strongly to the filter media, and thermocycled air streams applied to the media allow easy detachment and in-place regeneration of the media with minimal impact in system downtime or astronaut involvement in overseeing the process.

  20. Forced imbibition through model porous media

    NASA Astrophysics Data System (ADS)

    Odier, Celeste; Levache, Bertrand; Bartolo, Denis

    2016-11-01

    A number of industrial and natural process ultimately rely on two-phase flow in heterogeneous media. One of the most prominent example is oil recovery which has driven fundamental and applied research in this field for decades. Imbibition occurs when a wetting fluid displaces an immiscible fluid e.g. in a porous media. Using model microfluidic experiment we control both the geometry and wetting properties of the heterogenous media, and show that the typical front propagation picture fails when imbibition is forced and the displacing fluid is less viscous than the non-wetting fluid. We identify and quantitatively characterize four different flow regimes at the pore scale yielding markedly different imbibition patterns at large scales. In particular we will discuss the transition from a conventional 2D-front propagation scenario to a regime where the meniscus dynamics is an intrinsically 3D process.

  1. Recurrent Otitis Media and Attachment Security: A Path Model.

    ERIC Educational Resources Information Center

    McCallum, Michelle S.; McKim, Margaret K.

    1999-01-01

    Used regular telephone interviews over six months to examine processes through which recurrent episodes of otitis media influence children's attachment security. Found that recurrent otitis media negatively affected attachment security by increasing mothers' perceptions of their children as behaving more negatively. Parenting stress was not…

  2. How to Craft Social Media for Graduate Study

    ERIC Educational Resources Information Center

    Huwe, Terence K.

    2011-01-01

    Social media now offer a fresh opportunity to enliven the learning process. But to gain traction, they will have to prove their relevance. Librarians are quite vocal in advocating for the preservation of human interaction around digital media; one might say that it is their charge to be certain that the human factors within digital libraries are…

  3. Curricula for Media Literacy Education According to International Experts

    ERIC Educational Resources Information Center

    Fedorov, Alexander; Levitskaya, Anastasia; Camarero, Emma

    2016-01-01

    The article analyzes the results of the international experts' survey regarding the curriculum of media literacy education, which was administrated by the authors in September-October 2015. The expert panel includes specialists actively involved in the real process of media literacy education in schools, universities and other educational…

  4. Why Social Media Must Have a Place in Schools

    ERIC Educational Resources Information Center

    Krutka, Daniel G.; Carpenter, Jeffrey P.

    2016-01-01

    While most young people regularly consume and produce social media content, many schools focus on what students should not do with these technologies rather than address what students and teachers can do. The authors share ways that some educators leverage social media to enhance the who, when, where, why, how, and what of educational processes.

  5. The Space for Social Media in Structured Online Learning

    ERIC Educational Resources Information Center

    Salmon, Gilly; Ross, Bella; Pechenkina, Ekaterina; Chase, Anne-Marie

    2015-01-01

    In this paper, we explore the benefits of using social media in an online educational setting, with a particular focus on the use of Facebook and Twitter by participants in a Massive Open Online Course (MOOC) developed to enable educators to learn about the Carpe Diem learning design process. We define social media as digital social tools and…

  6. The Implications of a Mixed Media Network for Information Interchange.

    ERIC Educational Resources Information Center

    Meaney, John W.

    A mixed media network for information interchange is what we are always likely to have. Amid the current permutations of the storage and distribution media we see the emergence of two trends -- toward the common denominators of electronic display on the TV system and of digital processing and control. The economic implications of a mixed network…

  7. The Rest of the Elephant: Perspectives on the Mass Media.

    ERIC Educational Resources Information Center

    Stevens, John D.; Porter, William E.

    This book presents an analytical introduction to the study of the mass media. Aspects of media that have received little attention--audiences, economics, working processes and ethics--are treated in the four sections of the book. Section one covers symbiosis between the medium and the audience. Section two discusses the way in which business and…

  8. The Effects of Media Violence on Attitudes, Emotions, and Cognitions.

    ERIC Educational Resources Information Center

    Rule, Brendan Gail; Ferguson, Tamara J.

    1986-01-01

    Identifies mediating factors between the viewing of violent media and aggressive behavior. Discusses the role of cognitive and emotional arousal processes, and the interplay among these factors and attitudes toward aggression. Describes the effects of media exposure on arousal, emotional desensitization, and the excitement of the observer's…

  9. Making Sense of the Media: From Reading to Culture.

    ERIC Educational Resources Information Center

    Buckingham, David; Sefton-Green, Julian

    1993-01-01

    Summarizes recent debates concerning the use of popular culture and media within the English curriculum. Presents an approach to using media in fostering understanding the way meaning and taste are socially constructed. Describes research aimed at developing an account of reading as social process. (HB)

  10. Open Media Training Session

    ScienceCinema

    None

    2016-07-12

    Have you ever wondered how the media work and why some topics make it into the news and other don't? Would you like to know how to (and how not to) give an interview to a journalist? With the LHC preparing for first collisions at high energies, the world's media are again turning their attention to CERN. We're all likely to be called upon to explain what is happening at CERN to media, friends and neighbours. The seminar will be given by BBC television news journalists Liz Pike and Nadia Marchant, and will deal with the kind of questions we're likely to be confronted with through the restart period. Follow the webcast: http://webcast.cern.ch/

  11. Automated Diagnosis of Otitis Media: Vocabulary and Grammar

    PubMed Central

    Kuruvilla, Anupama; Hoberman, Alejandro; Kovačević, Jelena

    2013-01-01

    We propose a novel automated algorithm for classifying diagnostic categories of otitis media: acute otitis media, otitis media with effusion, and no effusion. Acute otitis media represents a bacterial superinfection of the middle ear fluid, while otitis media with effusion represents a sterile effusion that tends to subside spontaneously. Diagnosing children with acute otitis media is difficult, often leading to overprescription of antibiotics as they are beneficial only for children with acute otitis media. This underscores the need for an accurate and automated diagnostic algorithm. To that end, we design a feature set understood by both otoscopists and engineers based on the actual visual cues used by otoscopists; we term this the otitis media vocabulary. We also design a process to combine the vocabulary terms based on the decision process used by otoscopists; we term this the otitis media grammar. The algorithm achieves 89.9% classification accuracy, outperforming both clinicians who did not receive special training and state-of-the-art classifiers. PMID:23997759

  12. Feasibility study on pliant media drying using fluidized bed dryer

    NASA Astrophysics Data System (ADS)

    Zakaria, J. H.; Zaid, M. H. H. M.; Batcha, M. F. M.; Asmuin, N.

    2015-09-01

    The usage of pliant media for blasting in surface preparation has gained substantial interest in various industries, particularly oil and gas. Being a clean technology, this relatively new method of surface preparation has become an alternative to conventional abrasive blasting technique which lowers fugitive emissions from blasting process and hence lowering risk to workers in the industry. Despite proven to be effective and cost efficient, the usage of pliant media in tropical climate poses a new challenge due to the torrential rain in the monsoon season. During rainy and wet conditions, the pliant media was literally soaked and the recovery rate of the pliant media for a continuous blasting becomes retarded. A viable technique for drying of this pliant media has then become imperative. The present study proposes to dry water laden pliant media in a Swirling Fluidized Bed Dryer (SFBD). In this preliminary study, three bed loadings of 1.7, 2.0 and 2.3 kg of pliant media was dried in the SfBd at 80°C, 90°C and 100°C. The experimental works revealed that the SFBD has shown excellent potential to dry the pliant media with a relatively short drying time. The behaviour of moisture ratio and drying rate against time are discussed. The findings conclude that the SFBD is a feasible technique for wet pliant media drying and can be extended for continuous processing system.

  13. Media and risky behaviors.

    PubMed

    Escobar-Chaves, Soledad Liliana; Anderson, Craig A

    2008-01-01

    Liliana Escobar-Chaves and Craig Anderson investigate two important trends among American youth and examine the extent to which the two trends might be related. First, the authors note that U.S. youth are spending increasing amounts of time using electronic media, with the average American youngster now spending one-third of each day with some form of electronic media. Second, the authors demonstrate that American adolescents are engaging in a number of unhealthful behaviors that impose huge societal costs. Escobar-Chaves and Anderson detail the extent of five critical types of adolescent health risk behaviors identified by the Centers for Disease Control and Prevention-obesity, smoking, drinking, sexual risk taking, and violence. Obesity, the authors note, has become an epidemic among America's young people. Cigarette smoking among adolescents is one of the ten leading health indicators of greatest government concern. Alcohol abuse and alcohol dependence are widespread problems among the nation's youth and are the source of the three leading causes of death among youth. More than 20 percent of American high school students have sexual intercourse for the first time before they reach the age of fourteen. And twelve- to twenty-year-olds perpetrated 28 percent of the single-offender and 41 percent of multiple-offender violent crimes in the United States in 2005. Escobar-Chaves and Anderson present and evaluate research findings on the influence of electronic media on these five risk behaviors among adolescents. Researchers, they say, have found modest evidence that media consumption contributes to the problem of obesity, modest to strong evidence that it contributes to drinking and smoking, and strong evidence that it contributes to violence. Research has been insufficient to find links between heavy media exposure and early sexual initiation. The authors note the need for more large-scale longitudinal studies that specifically examine the cumulative effects of

  14. Developing a Social Media and Marketing Course

    ERIC Educational Resources Information Center

    Faulds, David J.; Mangold, W. Glynn

    2014-01-01

    This paper describes the process used and experiences gained in developing a social media and marketing course. As the first known paper on this topic appearing in the marketing education literature, the paper provides educators with a framework for developing similar courses. The course was developed using a sound instructional design model, the…

  15. The New Media and Informal Learning

    ERIC Educational Resources Information Center

    Matijevic, Milan

    2011-01-01

    At the end of the last millennium, schools received strong competition from the Internet, multimedia and other developed electronic media thanks to the new possibilities for gathering, processing, searching for and sending information. Furthermore, young people and adults now travel a lot, and by travelling they also learn. Never before in the…

  16. Deconstructing Cultural Stereotypes through Media Critique.

    ERIC Educational Resources Information Center

    Power, Karen

    Writing is an effective tool for investigating the problem of ethnic stereotyping, that is, grouping people from diverse cultures into broad unrepresentative categories. A first-year composition class addressed ethnic stereotyping using media critique. Class activities divided the process of deconstructing cultural stereotypes into three steps:…

  17. Seeking an Online Social Media Radar

    ERIC Educational Resources Information Center

    ter Veen, James

    2014-01-01

    Purpose: The purpose of this paper is to explore how the application of Systems Engineering tools and techniques can be applied to rapidly process and analyze the vast amounts of data present in social media in order to yield practical knowledge for Command and Control (C2) systems. Design/methodology/approach: Based upon comparative analysis of…

  18. Acute otitis media.

    PubMed

    Dickson, Gretchen

    2014-03-01

    One in 4 children will have at least 1 episode of acute otitis media (AOM) by age 10 years. AOM results from infection of fluid that has become trapped in the middle ear. The bacteria that most often cause AOM are Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis. Differentiating AOM from otitis media with effusion (OME) is a critical skill for physicians, as accurate diagnosis will guide appropriate treatment of these conditions. Although fluid is present in the middle ear in both conditions, the fluid is not infected in OME as is seen in AOM patients.

  19. Otitis media with effusion.

    PubMed

    Atkinson, Helen; Wallis, Sebastian; Coatesworth, Andrew P

    2015-05-01

    Otitis media with effusion (OME) is a common problem facing general practitioners, pediatricians and otolaryngologists. This article reviews the etiopathogenesis, epidemiology, presentation, natural history and management of OME. The literature was reviewed by using the PubMed search engine and entering a combination of terms including 'otitis media with effusion', 'epidemiology' and 'management'. Relevant articles were identified and examined for content. What is the take home message? While OME is a very common entity in the pediatric population, the majority of cases will resolve spontaneously. Surgery in the form of grommet insertion, with or without adenoidectomy is the most effective treatment in persistent symptomatic cases.

  20. Media and Influence

    NASA Astrophysics Data System (ADS)

    Bennett, William H.

    The public information media provides information on current events (news), entertainment (programming), and opinions offered by trusted public sources (e.g., business, academic or religious spokespersons, journalists, and government officials). Consequently, it is a major force in shaping a populace's attitudes toward significant social issues and of great interest to intervention planners. The chapter attempts to provide modelers and intervention analysts alike with sufficient understanding of media mechanisms and current research that they can begin contributing to, and benefiting from this important area of study.

  1. Velocity analysis for transversely isotropic media

    SciTech Connect

    Alkhalifah, T.; Tsvankin, I.

    1994-08-01

    The main difficulty in extending seismic processing to anisotropic media is the recovery of anisotropic velocity fields from surface reflection data. Velocity analysis for transversely isotropic (TI) media can be done by inverting the dependence of P-wave moveout velocities on the ray parameter. P-wave NMO velocity in homogeneous TI media with a vertical symmetry axis depends just on the zero-dip value V{sub nmo} and a new effective parameter {eta} that reduces to the difference between Thomsen parameters {epsilon} and {delta} in the limit of weak anisotropy. It is possible to obtain {eta} and reconstruct the NMO velocity as a function of ray parameter using moveout velocities for two different dips. Moreover, V{sub nmo}(0) and {eta} determine not only the NMO velocity, but also also long-spread (nonhyperbollic) P-wave moveout for horizontal reflectors and time-migration impulse response. Inversion of dip-moveout information allows performance of all time-processing steps in TI media using only surface P-wave data. Isotropic time-processing methods remain entirely valid for elliptical anisotropy ({epsilon} = {delta}). Accurate time-to-depth conversion, however, requires the vertical velocity V{sub P0} be resolved independently. If I-P0 is known, then allisotropies {epsilon} and {delta} can be found by inverting two P-wave NMO velocities corresponding to a horizontal and a dipping reflector. If no information is available, all three parameters (V {sub P0}, {epsilon}, and {delta}) can be obtained by combining inversion results with shear-wave information. such as the P-SV or SV-SV wave NMO velocities for a horizontal reflector. Generalization of Tsvankin`s single-layer NMO equation for layered anisotropic media with a dipping reflector provides a basis for extending anisotropic velocity analysis to vertically inhomogeneous media. The influence of a stratified overburden on moveout velocity can be stripped through a Dix-type differentiation procedure.

  2. Mass media influences on sexuality.

    PubMed

    Brown, Jane D

    2002-02-01

    The mainstream mass media (television, magazines, movies, music, and the Internet) provide increasingly frequent portrayals of sexuality. We still know relatively little about how this content is used and how it affects sexual beliefs and behaviors. The few available studies suggest that the media do have an impact because the media keep sexual behavior on public and personal agendas, media portrayals reinforce a relatively consistent set of sexual and relationship norms, and the media rarely depict sexually responsible models. More longitudinal research, especially with early adolescents is needed to learn more about how media content is attended to, interpreted, and incorporated into developing sexual lives.

  3. Library Media Services Handbook.

    ERIC Educational Resources Information Center

    Winnipeg School Div. Number 1, Manitoba (Canada).

    This 1991 edition of the handbook for Winnipeg School Division Number 1 school library media programs presents detailed program guidelines, objectives, philosophies, and goals in five major sections: (1) Library Policy and Practices (statement of the division's educational philosophy and goals, philosophy and goals of the division's library…

  4. Cyberbullying via Social Media

    ERIC Educational Resources Information Center

    Whittaker, Elizabeth; Kowalski, Robin M.

    2015-01-01

    Recent years have witnessed a surge of research on cyberbullying. In this article, three studies examined prevalence rates of cyberbullying among college-age students, venues through which cyberbullying occurs, with a particular focus on social media, and perceptions of cyberbullying as a function of features of the target (e.g., peer, celebrity,…

  5. The Media in China.

    ERIC Educational Resources Information Center

    Howkins, John

    1980-01-01

    Provides a brief history of television and radio in China and describes the use of television, radio, and film there, noting the number of television sets, radios, public loudspeakers, and cinemas. Article is comprised of extracts from the author's 193-page publication "China Media Industry Report 1980." (JD)

  6. Teleconferencing and Interactive Media.

    ERIC Educational Resources Information Center

    Parker, Lorne A., Comp.; Olgren, Christine H., Comp.

    This publication contains more than 50 papers on the latest developments and applications of interactive media to link distant locations. The contributors, who represent business, government, education, medical, and telecommunications organizations in the United States, Canada, England, and Australia, have had direct experience with the full range…

  7. Media and Risky Behaviors

    ERIC Educational Resources Information Center

    Escobar-Chaves, Soledad Liliana; Anderson, Craig A.

    2008-01-01

    Liliana Escobar-Chaves and Craig Anderson investigate two important trends among American youth and examine the extent to which the two trends might be related. First, the authors note that U.S. youth are spending increasing amounts of time using electronic media, with the average American youngster now spending one-third of each day with some…

  8. Basic Media in Education.

    ERIC Educational Resources Information Center

    Harrell, John

    Intended as a guide to the use of different media for use in the classroom, this document demonstrates alternative approaches that may be taken to depicting and communicating images and concepts to others. Some basic tools and materials--including a ruler, matte knife, rubber cement, stapler, felt-tip pens, paint brushes, and lettering pens--are…

  9. Media Specialist's Corner.

    ERIC Educational Resources Information Center

    Parrini, Michelle; Kittlaus, Jennifer

    2001-01-01

    Presents resources relating to this issue of "Insights on Law and Society" that are intended for students, teachers, and school library media specialists. Includes resources, such as primary documents for students, Web sites, Supreme Court cases, books, an online article, and lessons. (CMK)

  10. Media Specialist's Corner.

    ERIC Educational Resources Information Center

    Parrini, Michelle; Kittlaus, Jennifer

    2002-01-01

    Presents an annotated bibliography of resources for students, teachers, and school library media specialists related to the topic, "Youth, Rights, and the Constitution," found in this issue of "Insights on Law and Society." Includes books and primary sources for students. (CMK)

  11. The Indian Media Scenario.

    ERIC Educational Resources Information Center

    Eapen, K. E.

    As background information for a discussion of India's communication system and its potential for social change, this paper briefly describes the country's physical characteristics, some of its cultural heritage and demographics, and the development of its education and railways. After a discussion of the folk media (traditional changes) of…

  12. THE EDUCATIONAL MEDIA INDEX.

    ERIC Educational Resources Information Center

    Educational Media Council, Inc., New York, NY.

    THIS 14-VOLUME SERIES INCLUDES TITLES AND DESCRIPTIONS FOR ALL CURRENT AND GENERALLY AVAILABLE EDUCATIONAL MEDIA, EXCLUDING STANDARD PRINT MATERIALS. EACH VOLUME COVERS A SPECIFIC SUBJECT AREA, LISTS TITLES ALPHABETICALLY AND BY SUBJECT, DESCRIBES EACH ENTRY, AND LISTS NAMES AND ADDRESSES OF SOURCES FOR THE MATERIALS. VOLUME 14 IS A CUMULATIVE…

  13. Mass Media and Society.

    ERIC Educational Resources Information Center

    Wells, Alan

    Designed to serve as a basic text for general liberal arts courses in mass communication, this book presents essays, largely from recent magazine articles, written from the layman (although there are a few more overtly scholarly articles). It begins with an examination of the media industries in the United States, treating them as complex…

  14. Contextualised Media for Learning

    ERIC Educational Resources Information Center

    de Jong, Tim; Specht, Marcus; Koper, Rob

    2008-01-01

    In this paper, we analyse how contextualised media can be used to support learning. Additionally, the advantages of contextualised learning and the types of learning that are fit to be supported are discussed. Our focus throughout the paper will be on lifelong learning, and the integration of formal and informal learning therein. However, we…

  15. Archive Storage Media Alternatives.

    ERIC Educational Resources Information Center

    Ranade, Sanjay

    1990-01-01

    Reviews requirements for a data archive system and describes storage media alternatives that are currently available. Topics discussed include data storage; data distribution; hierarchical storage architecture, including inline storage, online storage, nearline storage, and offline storage; magnetic disks; optical disks; conventional magnetic…

  16. Media Matters in Australia.

    ERIC Educational Resources Information Center

    Daniels, Kell

    1998-01-01

    Describes how a teacher helped transform a K-12 Christian school near Sydney, Australia, from a book-bound media studies program into a hands-on learning experience for students. Various projects allow students to operate advanced equipment, evaluate their own and their peers' work, present research results to the class, and produce live media…

  17. New-Media Literacies

    ERIC Educational Resources Information Center

    Ohler, Jason

    2009-01-01

    Being literate in a real-world sense means being able to read and write using the media forms of the day, whatever they may be. For centuries, consuming and producing words through reading and writing and, to a lesser extent, listening and speaking were sufficient. But because of inexpensive, easy-to-use, and widely available new tools, literacy…

  18. Educational Media Yearbook 1973.

    ERIC Educational Resources Information Center

    Brown, James W., Ed.

    This collection of articles brings together the historical, statistical, and factual data needed to lend perspective to the attempt to understand the past and foresee the future of educational media. Coinciding with the 50th anniversary of the Association for Educational Communications and Technology, the Yearbook stresses the need for cooperation…

  19. Media Literacy: Good News

    ERIC Educational Resources Information Center

    Kenner, Adam; Rivera, Sheryl

    2007-01-01

    Media has always had the power to affect people on a nonverbal and emotional level. At its best, it can be a source of aesthetic pleasure and deep personal satisfaction. At its worst, citizens and consumers are exposed to psychological and political manipulation which may make them anxious and depressed, dissatisfied with what they have,…

  20. Looking at Mass Media.

    ERIC Educational Resources Information Center

    Sive, Mary Robinson

    1979-01-01

    This article offers a bibliography of recent inexpensive filmstrips, slide sets, and study prints that can expand students' awareness of such issues as psychic manipulation in TV commercials, the intrusion of show biz into news reporting, and the role of the advertiser in determining media content. (Editor/SJL)

  1. Language and the Media.

    ERIC Educational Resources Information Center

    Bell, Allan

    1995-01-01

    Reviews recent research on the use of language in the mass media, focusing on the work of Teun van Dijk, A. Bell, Roger Fowler, and Norman Fairclough, as well as research on broadcast interviews, talk shows, and advertising. An annotated bibliography discusses 16 important works in the field. (58 references) (MDM)

  2. English in Indian Media.

    ERIC Educational Resources Information Center

    Khubchandani, Lachman M.

    2000-01-01

    Examines the use of English in urban India, with specific focus on the three domains of mass media, print, television, and advertising. Points to the emergence of Angrezi, which can potentially take a divergent path as an Ausbau language different from the global English. Brings under discussion interesting examples of bilingual and biscriptal…

  3. Microphones and Educational Media.

    ERIC Educational Resources Information Center

    Page, Marilyn

    This paper describes the types of microphones that are available for use in media production. Definitions of 16 words and phrases used to describe microphones are followed by detailed descriptions of the two kinds of microphones as classified by mode of operation, i.e., velocity, or ribbon microphones, and pressure operated microphones, which…

  4. Looking to the future of new media in health marketing: deriving propositions based on traditional theories.

    PubMed

    Della, Lindsay J; Eroglu, Dogan; Bernhardt, Jay M; Edgerton, Erin; Nall, Janice

    2008-01-01

    Market trend data show that the media marketplace continues to rapidly evolve. Recent research shows that substantial portions of the U.S. media population are "new media" users. Today, more than ever before, media consumers are exposed to multiple media at the same point in time, encouraged to participate in media content generation, and challenged to learn, access, and use the new media that are continually entering the market. These media trends have strong implications for how consumers of health information access, process, and retain health-related knowledge. In this article we review traditional information processing models and theories of interpersonal and mass media access and consumption. We make several theory-based propositions for how traditional information processing and media consumption concepts will function as new media usage continues to increase. These propositions are supported by new media usage data from the Centers for Disease Control and Prevention's entry into the new media market (e.g., podcasting, virtual events, blogging, and webinars). Based on these propositions, we conclude by presenting both opportunities and challenges that public health communicators and marketers will face in the future.

  5. Media Now: A Historical Review of a Media Literacy Curriculum

    ERIC Educational Resources Information Center

    Friesem, Yonty; Quaglia, Diane; Crane, Ed

    2014-01-01

    The Elizabeth Thoman Archive at the Harrington School of Communication and Media, University of Rhode Island, has the last complete kit of one of the milestones in the early chronology of media literacy, the 1972 Media Now curriculum. This curriculum was the first of its kind, using self-contained lesson modules that were part of a larger series…

  6. Need for Orientation, Media Uses and Gratifications, and Media Effects.

    ERIC Educational Resources Information Center

    Weaver, David

    In order to study the influence of need for orientation and media gratifications on media use and media effects in political communication, two previous surveys were studied to compare the causal modeling approach and the contingent conditions approach. In the first study, 339 personal interviews were conducted with registered voters during a…

  7. Media, Media Technologies, and Language Learning: Some Applied Linguistic Perspectives.

    ERIC Educational Resources Information Center

    Little, David

    An applied linguistic framework is presented within which specific applications of media technologies may be applied to language learning. The first two parts of the paper focus on the impact of media on linguistic communication and the possibilities offered by media technologies such as newspapers, radio, television, telephone/telex, computer…

  8. Media coverage of medical decision making at the end of life: a Belgian case study.

    PubMed

    Van Brussel, Leen; Van Landeghem, Paul; Cohen, Joachim

    2014-01-01

    This article presents a content analysis of Belgian media coverage of end-of-life decision making. The authors examine a selection of press articles and the differences among media genres in covering the issue. In general terms, they found an overreporting of euthanasia; a focus on dying processes resulting from cancer and Alzheimer's disease; and an attention to political discussions and political voices, which outnumber patient voices. In genre-specific terms, unlike mainstream media, niche media reported less mediagenic aspects of the end of life. Finally, although popular mainstream media focus on personal aspects of the end-of-life, elite mainstream media privilege political aspects.

  9. Participatory advocacy: a counter to media imperialism.

    PubMed

    Brown, M

    1996-01-01

    Western media have a history of defining news worldwide, presenting news from a Western perspective which distorts and denies the truth as perceived from developing countries. Western news coverage of developing countries seems to emphasize countries' fragility, instability, and corruption, leading people to believe that the economic problems of developing countries are due to internal failures. That view is then transferred back to indigenous peoples and communities through major Western news agencies and mass media. Participatory communication is based upon the notion that people have the right to decide how they want themselves and their situations to be portrayed, to decide what information is useful to them and their community, and to be integral players in the communication process. With regard to media imperialism, the author discusses implications for advocacy activities, participatory communication approaches, participatory advocacy, participatory advocacy in South Asia, girl child drama in Nepal, drug abuse television drama in Nepal, and the advocacy challenge.

  10. Kinetic properties of fractal stellar media

    NASA Astrophysics Data System (ADS)

    Chumak, O. V.; Rastorguev, A. S.

    2017-01-01

    Kinetic processes in fractal stellar media are analysed in terms of the approach developed in our earlier paper involving a generalization of the nearest neighbour and random force distributions to fractal media. Diffusion is investigated in the approximation of scale-dependent conditional density based on an analysis of the solutions of the corresponding Langevin equations. It is shown that kinetic parameters (time-scales, coefficients of dynamic friction, diffusion, etc.) for fractal stellar media can differ significantly both qualitatively and quantitatively from the corresponding parameters for a quasi-uniform random media with limited fluctuations. The most important difference is that in the fractal case, kinetic parameters depend on spatial scalelength and fractal dimension of the medium studied. A generalized kinetic equation for stellar media (fundamental equation of stellar dynamics) is derived in the Fokker-Planck approximation with the allowance for the fractal properties of the spatial stellar density distribution. Also derived are its limit forms that can be used to describe small departures of fractal gravitating medium from equilibrium.

  11. Fingering, Fracturing and Dissolution in Granular Media

    NASA Astrophysics Data System (ADS)

    Juanes, R.; Cueto-Felgueroso, L.; Trojer, M.; Zhao, B.; Fu, X.

    2014-12-01

    The displacement of one fluid by another in a porous medium give rise to a rich variety of hydrodynamic instabilities. Beyond their scientific value as fascinating models of pattern formation, unstable porous-media flows are essential to understanding many natural and man-made processes, including water infiltration in the vadose zone, carbon dioxide injection and storage in deep saline aquifers, and hydrocarbon recovery. Here, we review the pattern-selection mechanisms of a wide spectrum of porous-media flows that develop hydrodynamic instabilities, discuss their origin and the mathematical models that have been used to describe them. We point out many challenges that remain to be resolved in the context of multiphase flows, and suggest modeling approaches that may offer new quantitative understanding. In particular, I will present experimental, theoretical and computational results for: (1) fluid spreading under partial wetting; (2) the impact of wettability on viscously unstable multiphase flow in porous media; (3) capillary fracturing in granular media; and (4) rock dissolution during convective mixing in porous media.

  12. Scalable cell alignment on optical media substrates.

    PubMed

    Anene-Nzelu, Chukwuemeka G; Choudhury, Deepak; Li, Huipeng; Fraiszudeen, Azmall; Peh, Kah-Yim; Toh, Yi-Chin; Ng, Sum Huan; Leo, Hwa Liang; Yu, Hanry

    2013-07-01

    Cell alignment by underlying topographical cues has been shown to affect important biological processes such as differentiation and functional maturation in vitro. However, the routine use of cell culture substrates with micro- or nano-topographies, such as grooves, is currently hampered by the high cost and specialized facilities required to produce these substrates. Here we present cost-effective commercially available optical media as substrates for aligning cells in culture. These optical media, including CD-R, DVD-R and optical grating, allow different cell types to attach and grow well on them. The physical dimension of the grooves in these optical media allowed cells to be aligned in confluent cell culture with maximal cell-cell interaction and these cell alignment affect the morphology and differentiation of cardiac (H9C2), skeletal muscle (C2C12) and neuronal (PC12) cell lines. The optical media is amenable to various chemical modifications with fibronectin, laminin and gelatin for culturing different cell types. These low-cost commercially available optical media can serve as scalable substrates for research or drug safety screening applications in industry scales.

  13. Children and the Mass Media

    ERIC Educational Resources Information Center

    Winston, Shirley

    1970-01-01

    Resume of testimony given at hearings at the White House Conference on Children, September, 1970. Topics considered were the influence of the mass media on children and ways to improve media products. (NH)

  14. Demography and the Mass Media.

    DTIC Science & Technology

    discussion of demography, its history, methodology and limitations, followed by a review of communications theory as it applies to the mass media . The...interrelations among the mass media , the government, and target audiences are demonstrated. (Modified author abstract)

  15. Learning-based imaging through scattering media.

    PubMed

    Horisaki, Ryoichi; Takagi, Ryosuke; Tanida, Jun

    2016-06-27

    We present a machine-learning-based method for single-shot imaging through scattering media. The inverse scattering process was calculated based on a nonlinear regression algorithm by learning a number of training object-speckle pairs. In the experimental demonstration, multilayer phase objects between scattering plates were reconstructed from intensity measurements. Our approach enables model-free sensing, where it is not necessary to know the sensing processes/models.

  16. Pyrolysis process and apparatus

    DOEpatents

    Lee, Chang-Kuei

    1983-01-01

    This invention discloses a process and apparatus for pyrolyzing particulate coal by heating with a particulate solid heating media in a transport reactor. The invention tends to dampen fluctuations in the flow of heating media upstream of the pyrolysis zone, and by so doing forms a substantially continuous and substantially uniform annular column of heating media flowing downwardly along the inside diameter of the reactor. The invention is particularly useful for bituminous or agglomerative type coals.

  17. Data Mining in Social Media

    NASA Astrophysics Data System (ADS)

    Barbier, Geoffrey; Liu, Huan

    The rise of online social media is providing a wealth of social network data. Data mining techniques provide researchers and practitioners the tools needed to analyze large, complex, and frequently changing social media data. This chapter introduces the basics of data mining, reviews social media, discusses how to mine social media data, and highlights some illustrative examples with an emphasis on social networking sites and blogs.

  18. Knowledge-based media adaptation

    NASA Astrophysics Data System (ADS)

    Leopold, Klaus; Jannach, Dietmar; Hellwagner, Hermann

    2004-10-01

    This paper introduces the principal approach and describes the basic architecture and current implementation of the knowledge-based multimedia adaptation framework we are currently developing. The framework can be used in Universal Multimedia Access scenarios, where multimedia content has to be adapted to specific usage environment parameters (network and client device capabilities, user preferences). Using knowledge-based techniques (state-space planning), the framework automatically computes an adaptation plan, i.e., a sequence of media conversion operations, to transform the multimedia resources to meet the client's requirements or constraints. The system takes as input standards-compliant descriptions of the content (using MPEG-7 metadata) and of the target usage environment (using MPEG-21 Digital Item Adaptation metadata) to derive start and goal states for the planning process, respectively. Furthermore, declarative descriptions of the conversion operations (such as available via software library functions) enable existing adaptation algorithms to be invoked without requiring programming effort. A running example in the paper illustrates the descriptors and techniques employed by the knowledge-based media adaptation system.

  19. Social media in clinical trials.

    PubMed

    Thompson, Michael A

    2014-01-01

    Social media has potential in clinical trials for pointing out trial issues, addressing barriers, educating, and engaging multiple groups involved in cancer clinical research. Social media is being used in clinical trials to highlight issues such as poor accrual and barriers; educate potential participants and physicians about clinical trial options; and is a potential indirect or direct method to improve accrual. We are moving from a passive "push" of information to patients to a "pull" of patients requesting information. Patients and advocates are often driving an otherwise reluctant health care system into communication. Online patient communities are creating new information repositories. Potential clinical trial participants are using the Twittersphere and other sources to learn about potential clinical trial options. We are seeing more organized patient-centric and patient-engaged forums with the potential to crowd source to improve clinical trial accrual and design. This is an evolving process that will meet many individual, institutional, and regulatory obstacles as we move forward in a changed research landscape.

  20. Media multitasking and behavioral measures of sustained attention.

    PubMed

    Ralph, Brandon C W; Thomson, David R; Seli, Paul; Carriere, Jonathan S A; Smilek, Daniel

    2015-02-01

    In a series of four studies, self-reported media multitasking (using the media multitasking index; MMI) and general sustained-attention ability, through performance on three sustained-attention tasks: the metronome response task (MRT), the sustained-attention-to-response task (SART), and a vigilance task (here, a modified version of the SART). In Study 1, we found that higher reports of media multitasking were associated with increased response variability (i.e., poor performance) on the MRT. However, in Study 2, no association between reported media multitasking and performance on the SART was observed. These findings were replicated in Studies 3a and 3b, in which we again assessed the relation between media multitasking and performance on both the MRT and SART in two large online samples. Finally, in Study 4, using a large online sample, we tested whether media multitasking was associated with performance on a vigilance task. Although standard vigilance decrements were observed in both sensitivity (A') and response times, media multitasking was not associated with the size of these decrements, nor was media multitasking associated with overall performance, in terms of either sensitivity or response times. Taken together, the results of the studies reported here failed to demonstrate a relation between habitual engagement in media multitasking in everyday life and a general deficit in sustained-attention processes.

  1. Learning Media Assessment of Students with Visual Impairments: A Resource Guide for Teachers. 2nd Edition.

    ERIC Educational Resources Information Center

    Koenig, Alan J.; Holbrook, M. Cay

    Designed to assist in the selection of appropriate literacy media for students with visual impairments, this guide outlines the essential elements of learning media assessments. Chapter 1 provides an overview of the learning media assessment (LMA) process. Included is a discussion of Texas law and regulations that govern LMA. Chapter 2 documents…

  2. Critically Redefining and Repositioning Media Texts in Early Childhood Teacher Education: What If? And Why?

    ERIC Educational Resources Information Center

    Souto-Manning, Mariana; Price-Dennis, Detra

    2012-01-01

    Given the prevalence of popular media in the lives of young children today, early childhood teacher education stands to benefit from fostering critical media literacy practices. Through the use of critical media literary practices, early childhood teacher educators can facilitate a process whereby preservice teachers learn how to critically…

  3. Cuban Mass Media: Organization, Control and Functions. Journalism Monographs Number Seventy-Eight.

    ERIC Educational Resources Information Center

    Nichols, John Spicer

    The mass media as interdependent parts of a larger social system both control and are controlled by other subsystems. The various combinations of control, in turn, determine the functions the media system will serve. In the 1960's, the Cuban mass media underwent frequent change that reflected the volatility of the revolutionary process. Today,…

  4. Conceptualizing Media Stimuli in Experimental Research: Psychological versus Attribute-Based Definitions

    ERIC Educational Resources Information Center

    Tao, Chen-Chao; Bucy, Erik P.

    2007-01-01

    This paper argues for a clearer conceptualization of media stimuli in experimental research and identifies 3 issues impeding our understanding of message processing: (a) assumptions bolstered by manipulation checks about homogeneity of response to media stimuli, (b) conflation of 2 different classes of variables--media attributes and psychological…

  5. Being Heard: A Guide to Media Use in Southeast Michigan. First Edition.

    ERIC Educational Resources Information Center

    Michigan Univ., Ann Arbor. School of Natural Resources.

    This document is designed to help community organizations and public interest groups in southeastern Michigan succeed in gaining the attention of local (and perhaps national) media. Chapter 1 provides a framework, a process, with which to approach media planning, describing the various media available, starting with newspapers, television/radio,…

  6. Media Literacy Education in the Balkan Countries: The Greece and Turkey Case

    ERIC Educational Resources Information Center

    Tanriverdi, Belgin

    2008-01-01

    The mass communication process via (mass) media has a great potential of reaching people all around the world. This may foster cosmopolitanism and democracy, but it also holds the danger of an increasing manipulation because of the fact that media can never be neutral and value-free. While some studies do not see a harmful impact of media, most…

  7. Improved media performance in optimally coupled exchange spring layer media

    NASA Astrophysics Data System (ADS)

    Berger, A.; Supper, N.; Ikeda, Y.; Lengsfield, B.; Moser, A.; Fullerton, E. E.

    2008-09-01

    We have studied the recording performance of perpendicular exchange spring layer (ESL)-media for hard disk drive recording. In particular, we investigated the role of interlayer coupling by varying the thickness of a nonmagnetic coupling layer (CL). We demonstrate that not only the media writeability is improved upon optimizing the CL thickness, but also that substantial recording performance improvements can be achieved due to improved media noise properties. The potential of these media structures for high areal density recording is demonstrated by performing areal density measurements, which showed a substantial improvement for optimally coupled ESL-media.

  8. [Media for 21st century--towards human communication media].

    PubMed

    Harashima, H

    2000-05-01

    Today, with the approach of the 21st century, attention is focused on multi-media communications combining computer, visual and audio technologies. This article discusses the communication media target and the technological problems constituting the nucleus of multi-media. The communication media is becoming an environment from which no one can escape. Since the media has such a great power, what is needed now is not to predict the future technologies, but to estimate the future world and take to responsibility for future environments.

  9. The Impact of Mass Media.

    ERIC Educational Resources Information Center

    Aldrich, Pearl G.

    In order to bring the student's contemporary environment into the classroom for study and to avoid topicality, this book provides general principles by which to evaluate current media offerings, outlines the patterns from which media materials are cut for public consumption, and focuses the student's attention on the mass media themselves. Each of…

  10. Media Literacy. Technical Assistance Packet.

    ERIC Educational Resources Information Center

    Join Together, Boston, MA.

    The media play an increasingly strong role in transmitting values; behaviors; social norms; attitudes; and knowledge to youth and adults. Media literacy involves the ability to ask questions about what is watched, heard, or read. It involves learning what to look for, what to ask, and how to question these many influences. Media literacy also…

  11. MASS MEDIA AND SOCIAL CHANGE

    DTIC Science & Technology

    The relationships between mass media of communication and social change are discussed, and the significance and roles of the mass media in developing and modernized countries are summarized. On the assumption that the contents of the... mass media mirror as well as affect the perspectives and values

  12. Approaching the media with confidence.

    PubMed

    Meade, C D

    1992-09-01

    The media are useful in communicating health information to the public. They are also a powerful way to promote and maintain positive nursing images. This paper examines the past portrayals of nurses in the media, explores the benefits of communicating nursing knowledge to the profession and to the community, and suggests strategies to access the media.

  13. Issues in Media Management, 1975.

    ERIC Educational Resources Information Center

    Bender, David R., Ed.

    Nine papers from a two-day workshop concentrate on curriculum development, guidance, and counseling. Topics covered in these papers include media and instruction, humanistic education, the instructional team approach, media and methods, Title IV Elementary Secondary Education Act, media and guidance, and the art of writing a grant. (DS)

  14. Transmedia Play: Literacy across Media

    ERIC Educational Resources Information Center

    Alper, Meryl; Herr-Stephenson, Rebecca

    2013-01-01

    Transmedia play is a new way to understand how children develop critical media literacy and new media literacies through their interactions with contemporary media that links stories and structures across platforms. This essay highlights five characteristics of transmedia play that make it particularly useful for learning:…

  15. REPORT ON UNDERSTANDING NEW MEDIA.

    ERIC Educational Resources Information Center

    MCLUHAN, MARSHALL

    IN TYPICAL MCLUHAN STYLE, THE AUTHOR OF THIS WORKING PAPER TRACES HISTORICAL-CULTURAL TRANSITIONS FROM PHONETIC ALPHABET TECHNOLOGY TO MEDIA OF THE NEW ELECTRONIC TECHNOLOGY. THESE MEDIA ARE VIEWED AS EXTENSIONS OF MAN'S SENSES, AND AS LANGUAGES THEMSELVES, WHOSE ONLY CONTENT ARE OTHER MEDIA. EACH MEDIUM (E.G. SPEECH, WRITING, PRINT, PHOTOGRAPHY,…

  16. Media Violence and Young People.

    ERIC Educational Resources Information Center

    Oaks, Harold R.

    1995-01-01

    Discusses the possibility of a connection between violence in the media and actual adolescent behavior. Explores the nature of the connection, why it exists, and possible courses of action to correct the problem. States that 3,000 studies have explored the link between media violence and adolescent behavior. Concludes that the media should show…

  17. The challenge of evaluating complex interventions: a framework for evaluating media advocacy.

    PubMed

    Stead, Martine; Hastings, Gerard; Eadie, Douglas

    2002-06-01

    New health promotion and public health approaches such as media advocacy pose particular evaluation challenges. Evaluation is important to provide feedback to media advocacy practitioners on how to enhance their efforts, and to funders and researchers seeking to assess media advocacy's effectiveness as a health promotion strategy. The media advocacy evaluation literature contains some examples of promising evaluation approaches but is still evolving. A comprehensive framework for the evaluation of media advocacy is presented. Building on existing approaches to evaluation in media advocacy and on current thinking regarding evaluation in health promotion, it proposes a series of indicators and research methods for evaluating media advocacy at the levels of formative, process and outcome evaluation. The framework can be used to encourage strategic reflection on the media advocacy process, to guide evaluation of specific interventions, and to demonstrate to funders the importance and complexity of evaluation in this promising field.

  18. Mass Communication Functions in a Media-Rich Developing Society

    ERIC Educational Resources Information Center

    Chaffee, Steven H.; Izcaray, Fausto

    1975-01-01

    Discusses media-centered communication research models and applies them to a field setting in Venezuela in an attempt to assess the extent to which social processes depend on mass communication. See CS 703 632 for subscription information. (MH)

  19. Excited states in the active media of oxygen - iodine lasers

    SciTech Connect

    Azyazov, V N

    2009-11-30

    A review of investigations of kinetic processes in active media oxygen - iodine lasers (OILs) performed in the last decade is presented. The mechanisms of pumping and quenching of electronically and vibrationally excited O{sub 2} and I{sub 2} molecules are considered, and dissociation mechanisms of I{sub 2} in the active medium of the OIL are analysed. The values of kinetic constants of processes proceeding in the active media of OILs are recommended. (review)

  20. Use of social media in health promotion: purposes, key performance indicators, and evaluation metrics.

    PubMed

    Neiger, Brad L; Thackeray, Rosemary; Van Wagenen, Sarah A; Hanson, Carl L; West, Joshua H; Barnes, Michael D; Fagen, Michael C

    2012-03-01

    Despite the expanding use of social media, little has been published about its appropriate role in health promotion, and even less has been written about evaluation. The purpose of this article is threefold: (a) outline purposes for social media in health promotion, (b) identify potential key performance indicators associated with these purposes, and (c) propose evaluation metrics for social media related to the key performance indicators. Process evaluation is presented in this article as an overarching evaluation strategy for social media.

  1. Repetitive Regeneration of Media #1 in a Dynamic Column Extraction using Brine #1

    SciTech Connect

    Gary Garland

    2015-10-14

    This data is from a regeneration study from a dynamic column extraction experiment where we ran a solution of REE's through a column of media #1 then stripped the REE's off the media using 2M HNO3 solution. We then re-equilibrated the media and repeated the process of running a REE solution through the column and stripping the REE's off the media and comparing the two runs.

  2. Media Makes for Public Learning

    NASA Astrophysics Data System (ADS)

    Rockman, S.

    2013-12-01

    Learning from media: what studies of media projects can help us understand about informing the public about science issues. Saul Rockman, has studied a variety of television and radio projects funded by NSF, NASA, and foundations. He will highlight findings that inform strategies to increase learning about science content and issues through the media, as well as inform policy on communicating complex scientific ideas to citizens of all ages. Rockman has gathered evidence from science media ranging from Bill Nye The Science Guy to BURN, An Energy Journal.Media for Children vs. Adults

  3. Michael Faraday, media man.

    PubMed

    Fara, Patricia

    2006-03-01

    Michael Faraday was an enthusiastic portrait collector, and he welcomed the invention of photography not only as a possible means of recording observations accurately, but also as a method for advertising science and its practitioners. This article (which is part of the Science in the Industrial Revolution series) shows that like many eminent scientists, Faraday took advantage of the burgeoning Victorian media industry by posing in various roles.

  4. 2004 News Media Industry

    DTIC Science & Technology

    2004-01-01

    Content and credibility vary, and few online news organizations conduct reporting operations. The Wall Street Journal Online is a notable...served by the Wall Street Journal Online, but innovative advertising schemes coupled with rising market shares should propel the more traditional news...Votes to Scrap New Media Rules.” Wall Street Journal (Sep 17, 2003). Downie, Leonard Jr. and Robert G. Kaiser. The News About the News: American

  5. Aerofractures in Confined Granular Media

    NASA Astrophysics Data System (ADS)

    Eriksen, Fredrik K.; Turkaya, Semih; Toussaint, Renaud; Måløy, Knut J.; Flekkøy, Eirik G.

    2015-04-01

    We will present the optical analysis of experimental aerofractures in confined granular media. The study of this generic process may have applications in industries involving hydraulic fracturing of tight rocks, safe construction of dams, tunnels and mines, and in earth science where phenomena such as mud volcanoes and sand injectites are results of subsurface sediment displacements driven by fluid overpressure. It is also interesting to increase the understanding the flow instability itself, and how the fluid flow impacts the solid surrounding fractures and in the rest of the sample. Such processes where previously studied numerically [Niebling 2012a, Niebling 2012b] or in circular geometries. We will here explore experimentally linear geometries. We study the fracturing patterns that form when air flows into a dense, non-cohesive porous medium confined in a Hele-Shaw cell - i.e. into a packing of dry 80 micron beads placed between two glass plates separated by ~1mm. The cell is rectangular and fitted with a semi-permeable boundary to the atmosphere - blocking beads but not air - on one short edge, while the other three edges are impermeable. The porous medium is packed inside the cell between the semi-permeable boundary and an empty volume at the sealed side where the air pressure can be set and kept at a constant overpressure (1-2bar). Thus, for the air trapped inside the cell to release the overpressure it has to move through the solid. At high enough overpressures the air flow deforms the solid and increase permeability in some regions along the air-solid interface, which results in unstable flow and aerofracturing. Aerofractures are thought to be an analogue to hydrofractures, and an advantage of performing aerofracturing experiments in a Hele-Shaw cell is that the fracturing process can easily be observed in the lab. Our experiments are recorded with a high speed camera with a framerate of 1000 frames per second. In the analysis, by using various image

  6. Update on Otitis Media in Children.

    ERIC Educational Resources Information Center

    Schoem, Scott R.

    1997-01-01

    This article discusses otitis media in children. It addresses risk factors for otitis media, pathogenesis, diagnosis, bacteria causing otitis media, and treatment for acute otitis media, recurrent acute otitis media, and persistent otitis media with effusion, including antibiotics, steroids, allergy control, autoinflation, mechanical ventilation,…

  7. Media Literacy: 21st Century Learning

    ERIC Educational Resources Information Center

    Baker, Frank W.

    2011-01-01

    The media, for better or worse, deliver the news and the gossip; they entertain, educate and inform. The media have not always been in American classrooms. Yes, teachers teach with media, but rarely do they teach "about" the media. It's called media literacy. Most students are not receiving adequate media literacy instruction, mostly because their…

  8. Information Provenance in Social Media

    NASA Astrophysics Data System (ADS)

    Barbier, Geoffrey; Liu, Huan

    Information appearing in social media provides a challenge for determining the provenance of the information. However, the same characteristics that make the social media environment challenging provide unique and untapped opportunities for solving the information provenance problem for social media. Current approaches for tracking provenance information do not scale for social media and consequently there is a gap in provenance methodologies and technologies providing exciting research opportunities for computer scientists and sociologists. This paper introduces a theoretical approach aimed guiding future efforts to realize a provenance capability for social media that is not available today. The guiding vision is the use of social media information itself to realize a useful amount provenance data for information in social media.

  9. SOCIAL MEDIA MINING SHARED TASK WORKSHOP.

    PubMed

    Sarker, Abeed; Nikfarjam, Azadeh; Gonzalez, Graciela

    2016-01-01

    Social media has evolved into a crucial resource for obtaining large volumes of real-time information. The promise of social media has been realized by the public health domain, and recent research has addressed some important challenges in that domain by utilizing social media data. Tasks such as monitoring flu trends, viral disease outbreaks, medication abuse, and adverse drug reactions are some examples of studies where data from social media have been exploited. The focus of this workshop is to explore solutions to three important natural language processing challenges for domain-specific social media text: (i) text classification, (ii) information extraction, and (iii) concept normalization. To explore different approaches to solving these problems on social media data, we designed a shared task which was open to participants globally. We designed three tasks using our in-house annotated Twitter data on adverse drug reactions. Task 1 involved automatic classification of adverse drug reaction assertive user posts; Task 2 focused on extracting specific adverse drug reaction mentions from user posts; and Task 3, which was slightly ill-defined due to the complex nature of the problem, involved normalizing user mentions of adverse drug reactions to standardized concept IDs. A total of 11 teams participated, and a total of 24 (18 for Task 1, and 6 for Task 2) system runs were submitted. Following the evaluation of the systems, and an assessment of their innovation/novelty, we accepted 7 descriptive manuscripts for publication--5 for Task 1 and 2 for Task 2. We provide descriptions of the tasks, data, and participating systems in this paper.

  10. Coupling flood forecasting and social media crowdsourcing

    NASA Astrophysics Data System (ADS)

    Kalas, Milan; Kliment, Tomas; Salamon, Peter

    2016-04-01

    Social and mainstream media monitoring is being more and more recognized as valuable source of information in disaster management and response. The information on ongoing disasters could be detected in very short time and the social media can bring additional information to traditional data feeds (ground, remote observation schemes). Probably the biggest attempt to use the social media in the crisis management was the activation of the Digital Humanitarian Network by the United Nations Office for the Coordination of Humanitarian Affairs in response to Typhoon Yolanda. The network of volunteers performing rapid needs & damage assessment by tagging reports posted to social media which were then used by machine learning classifiers as a training set to automatically identify tweets referring to both urgent needs and offers of help. In this work we will present the potential of coupling a social media streaming and news monitoring application ( GlobalFloodNews - www.globalfloodsystem.com) with a flood forecasting system (www.globalfloods.eu) and the geo-catalogue of the OGC services discovered in the Google Search Engine (WMS, WFS, WCS, etc.) to provide a full suite of information available to crisis management centers as fast as possible. In GlobalFloodNews we use advanced filtering of the real-time Twitter stream, where the relevant information is automatically extracted using natural language and signal processing techniques. The keyword filters are adjusted and optimized automatically using machine learning algorithms as new reports are added to the system. In order to refine the search results the forecasting system will be triggering an event-based search on the social media and OGC services relevant for crisis response (population distribution, critical infrastructure, hospitals etc.). The current version of the system makes use of USHAHIDI Crowdmap platform, which is designed to easily crowdsource information using multiple channels, including SMS, email

  11. "Othering" agricultural biotechnology: Slovenian media representation of agricultural biotechnology.

    PubMed

    Zajc, Jožica; Erjavec, Karmen

    2014-08-01

    While studies on media representations of agricultural biotechnology mostly analyse media texts, this work is intended to fill a research gap with an analysis of journalistic interpretations of media representations. The purpose of this project was to determine how news media represent agricultural biotechnology and how journalists interpret their own representations. A content and critical discourse analysis of news texts published in the Slovenian media over two years and in-depth interviews with their authors were conducted. News texts results suggest that most of the news posts were "othering" biotechnology and biotechnologists: biotechnology as a science and individual scientists are represented as "they," who are socially irresponsible, ignorant, arrogant, and "our" enemies who produce unnatural processes and work for biotechnology companies, whose greed is destroying people, animals, and the environment. Most journalists consider these representations to be objective because they have published the biotechnologists' opinions, despite their own negative attitudes towards biotechnology.

  12. Filter Media Tests Under Simulated Martian Atmospheric Conditions

    NASA Technical Reports Server (NTRS)

    Agui, Juan H.

    2016-01-01

    Human exploration of Mars will require the optimal utilization of planetary resources. One of its abundant resources is the Martian atmosphere that can be harvested through filtration and chemical processes that purify and separate it into its gaseous and elemental constituents. Effective filtration needs to be part of the suite of resource utilization technologies. A unique testing platform is being used which provides the relevant operational and instrumental capabilities to test articles under the proper simulated Martian conditions. A series of tests were conducted to assess the performance of filter media. Light sheet imaging of the particle flow provided a means of detecting and quantifying particle concentrations to determine capturing efficiencies. The media's efficiency was also evaluated by gravimetric means through a by-layer filter media configuration. These tests will help to establish techniques and methods for measuring capturing efficiency and arrestance of conventional fibrous filter media. This paper will describe initial test results on different filter media.

  13. Using Entertainment Media to Inform Student Affairs Teaching and Practice Related to Sex and Gender

    ERIC Educational Resources Information Center

    Davis, Tracy L.

    2004-01-01

    This chapter presents several strategies for teaching about sex and gender using entertainment media and explores critical issues related to content development, the delivery process, and evaluation methods.

  14. The News Media Industry

    DTIC Science & Technology

    2007-11-02

    history , as the press has provided Americans with the facts they need to properly judge events and those who govern the Republic. The intent of the...more media choices than any time in history . On June 2, the FCC voted to relax most of the rules in question, potentially opening the door to further...growth and economic viability of the Internet news model. One newspaper executive notes, “It’s hard to second-guess history , but if many people could

  15. Outreach using the media

    NASA Astrophysics Data System (ADS)

    Fierro, J.

    2006-08-01

    Outreach is the best way to carry out informal astronomy education during a person's life. Astronomy is such an attractive and evolving discipline that people of all age levels are usually attracted to it in spite of feeling threatened by the apparent difficulty of science. During my presentation I shall address the importance of astronomical popularization. I shall mention fundraising for its diffusion employing radio and television programs. Simple demonstrations will also be included. I will also remind members of Commission 46 that 2009 might become the Year of Astronomy and mass media are an ideal way for astronomical outreach projects.

  16. Poromechanics of microporous media

    NASA Astrophysics Data System (ADS)

    Brochard, L.; Vandamme, M.; Pellenq, R. J.-M.

    2012-04-01

    Microporous media, i.e., porous media made of pores with a nanometer size, are important for a variety of applications, for instance for sequestration of carbon dioxide in coal, or for storage of hydrogen in metal-organic frameworks. In a pore of nanometer size, fluid molecules are not in their bulk state anymore since they interact with the atoms of the solid: they are said to be in an adsorbed state. For such microporous media, conventional poromechanics breaks down. In this work we derive poroelastic constitutive equations which are valid for a generic porous medium, i.e., even for a porous medium with pores of nanometer size. The complete determination of the poromechanical behavior of a microporous medium requires knowing how the amount of fluid adsorbed depends on both the fluid bulk pressure and the strain of the medium. The derived constitutive equations are validated with the help of molecular simulations on one-dimensional microporous media. Even when a microporous medium behaves linearly in the absence of any fluid (i.e., its bulk modulus does not depend on strain), we show that fluid adsorption can induce non-linear behavior (i.e., its drained bulk modulus can then depend significantly on strain). We also show that adsorption can lead to an apparent Biot coefficient of the microporous medium greater than unity or smaller than zero. The poromechanical response of a microporous medium to adsorption significantly depends on the pore size distribution. Indeed, the commensurability (i.e., the ratio of the size of the pores to that of the fluid molecules) proves to play a major role. For a one-dimensional model of micropores with a variety of pore sizes, molecular simulations show that the amount of adsorbed fluid depends linearly on the strain of the medium. We derive linearized constitutive equations which are valid when such a linear dependence of the adsorbed amount of fluid on the strain is observed. As an application, the case of methane and coal is

  17. Maxwell Equations for Slow-Moving Media

    NASA Astrophysics Data System (ADS)

    Rozov, Andrey

    2015-12-01

    In the present work, the Minkowski equations obtained on the basis of theory of relativity are used to describe electromagnetic fields in moving media. But important electromagnetic processes run under non-relativistic conditions of slow-moving media. Therefore, one should carry out its description in terms of classical mechanics. Hertz derived electrodynamic equations for moving media within the frame of classical mechanics on the basis of the Maxwell theory. His equations disagree with the experimental data concerned with the moving dielectrics. In the paper, a way of description of electromagnetic fields in slow-moving media on the basis of the Maxwell theory within the frame of classical mechanics is offered by combining the Hertz approach and the experimental data concerned with the movement of dielectrics in electromagnetic fields. Received Maxwell equations lack asymmetry in the description of the reciprocal electrodynamic action of a magnet and a conductor and conform to known experimental data. Comparative analysis of the Minkowski and Maxwell models is carried out.

  18. Media Effects: Theory and Research.

    PubMed

    Valkenburg, Patti M; Peter, Jochen; Walther, Joseph B

    2016-01-01

    This review analyzes trends and commonalities among prominent theories of media effects. On the basis of exemplary meta-analyses of media effects and bibliometric studies of well-cited theories, we identify and discuss five features of media effects theories as well as their empirical support. Each of these features specifies the conditions under which media may produce effects on certain types of individuals. Our review ends with a discussion of media effects in newer media environments. This includes theories of computer-mediated communication, the development of which appears to share a similar pattern of reformulation from unidirectional, receiver-oriented views, to theories that recognize the transactional nature of communication. We conclude by outlining challenges and promising avenues for future research.

  19. [Eating disorders and mass media].

    PubMed

    Peroutsi, A; Gonidakis, F

    2011-01-01

    During the last 50 years, eating disorders have developed to a complicated and widespread medical and social issue. The latest research results indicate that eating disorders have a quite complicated and multifactorial etiology. According to the multifactorial etiological model, the impact of mass media can be regarded mainly as a precipitating factor. The literature review showed that mass media have a considerable impact on the development and perpetuation of eating disorders. Mass media contribute to the promotion of the thinness ideal as a way to achieve social approval, recognition and success. Mass media also promote dieting and food deprivation, as a successful way of life or as a socially agreeable practice. Furthermore, the literature review showed that mass media remain the main source of information about eating disorders. Considering the above result, mass media could play a major role in the promotion of prevention practices and early diagnosis and treatment of eating disorders.

  20. Pneumatic fracturing of low permeability media

    SciTech Connect

    Schuring, J.R.

    1996-08-01

    Pneumatic fracturing of soils to enhance the removal and treatment of dense nonaqueous phase liquids is described. The process involves gas injection at a pressure exceeding the natural stresses and at a flow rate exceeding the permeability of the formation. The paper outlines geologic considerations, advantages and disadvantages, general technology considerations, low permeability media considerations, commercial availability, efficiency, and costs. Five case histories of remediation using pneumatic fracturing are briefly summarized. 11 refs., 2 figs., 1 tab.

  1. Capture of particles in soft porous media

    NASA Astrophysics Data System (ADS)

    Louvet, N.; Höhler, R.; Pitois, O.

    2010-10-01

    We investigate the capture of particles in soft porous media. Liquid foam constitutes a model system for such a study, allowing the radii of passage in the pore space to be tuned over several orders of magnitude by adjusting the liquid volume fraction. We show how particle capture is determined by the coupling of interstitial liquid flow and network deformation, and present a simple model of the capture process that shows good agreement with our experimental data.

  2. Liquid imbibition in particulate porous media in microgravity

    NASA Astrophysics Data System (ADS)

    Jones, Scott; Tuller, Markus; Or, Dani

    Porous media liquid imbibition has been characterized on earth (1g) to describe gravitydependent wetting processes and is of interest in reduced gravity for characterizing hydrodynamic properties of porous media. Short microgravity (µug) periods of about 20 seconds aboard NASA's parabolic flight aircraft provide limited experimental opportunities to observe imbibition in weightlessness. The objectives of this study were to i) obtain measurements of µg liquid imbibition during parabolic flight and ii) to apply capillary-dominated imbibition models to characterize and describe this process. Glass beads and baked ceramic aggregates ranging in size from 0.25 to 3.5 mm were used to visually record liquid imbibition during µg. The Lucas-Washburn (1918, 1921) and Philip (1957) equations were used to model imbibition in these media and to compare parameters obtained under earth's gravity using the same porous media. In µg, capillary forces dominate imbibition with wetting rates lying between horizontal and vertical (upward) 1g measurements. Pre-wet media exhibited repeatable enhanced imbibition rates compared to imbibition in dry media. Phenomena associated with wetting dry media include air entrapment caused by prefferential flow paths and instabilities at the wetting front.

  3. Common Mapping System Media Study

    DTIC Science & Technology

    1994-04-01

    CMS standiard, including mission plaMing, intelligence, and avionics systems . The distribution media types supported by CMS will significantly iumat...the utility and cost of CMS for these systems . This paper presents the results of an investigation into the attributes of candidate distribution media...Common Mapping System ( CMS ) defines data formats and standard distribution media for the storage, interchange, and retrieval of MCG&I data. A variety of

  4. Outlooks on Children and Media: Child Rights, Media Trends, Media Research, Media Literacy, Child Participation, Declarations. Children and Media Violence Yearbook, 2001.

    ERIC Educational Resources Information Center

    von Feilitzen, Cecilia; Bucht, Catharina

    Focusing on media literacy, this yearbook compiles information on recent and current trends in media effects, including research on children and media, declarations related to the area, and a selection of relevant organizations and Web sites. The report first delineates children's rights as stipulated in the U.N. Convention on the Rights of the…

  5. Quantum-dot based nanothermometry in optical plasmonic recording media

    SciTech Connect

    Maestro, Laura Martinez; Zhang, Qiming; Li, Xiangping; Gu, Min; Jaque, Daniel

    2014-11-03

    We report on the direct experimental determination of the temperature increment caused by laser irradiation in a optical recording media constituted by a polymeric film in which gold nanorods have been incorporated. The incorporation of CdSe quantum dots in the recording media allowed for single beam thermal reading of the on-focus temperature from a simple analysis of the two-photon excited fluorescence of quantum dots. Experimental results have been compared with numerical simulations revealing an excellent agreement and opening a promising avenue for further understanding and optimization of optical writing processes and media.

  6. Is Chaotic Advection Inherent to Porous Media Flow?

    NASA Astrophysics Data System (ADS)

    Lester, Daniel; Metcalfe, Guy; Trefry, Mike

    2013-11-01

    All porous media, including granular and packed media, fractured and open networks, are typified by the inherent topological complexity of the pore-space. This topological complexity admits a large number density of stagnation points under steady Stokes flow, which in turn generates a 3D fluid mechanical analouge of the Bakers map, termed the Baker's flow. We demonstrate that via this mechanism, chaotic advection at the pore-scale is inherent to almost all porous media under reasonable conditions, and such dynamics have significant implications for a range of fluid-borne processes including transport and mixing, chemical reactions and biological activity.

  7. Adolescent sexuality and the media.

    PubMed

    Strasburger, V C

    1989-06-01

    Teenagers spend more time with the media than they do in any other activity except sleeping. Is it mere coincidence that the rises in rates of adolescent sexual intercourse during the past 30 years have coincided with the new era of electronic media? Do the media merely reflect society's changes, or do they have the capacity to influence human behavior as well? Although currently part of the problem of teenage pregnancy, the media could become part of the solution, if they were to portray human sexuality responsibly and allow the advertising of contraception.

  8. Social Media as Collaborative Media in Workplace Learning

    ERIC Educational Resources Information Center

    Thomas, Kristopher J.; Akdere, Mesut

    2013-01-01

    As a result of rapid changes in technology, much is discussed about the use of social media in branding, marketing, and in general corporate communications. The intensity with which social media tools--blogs, wikis, Twitter, instant messaging (IM) and Facebook, among others--have proliferated is staggering. Increasingly important is the role of…

  9. The Dual Role of Media Internalization in Adolescent Sexual Behavior.

    PubMed

    Rousseau, Ann; Beyens, Ine; Eggermont, Steven; Vandenbosch, Laura

    2016-12-16

    Sexualizing media content is prevalent in various media types. Sexualizing media messages and portrayals emphasize unattainable body and appearance ideals as the primary components of sexual desirability. The internalization of these ideals is positively related to self-objectification and sexual body consciousness. In turn, self-objectification and sexual body consciousness affect adolescents' sexual behavior, albeit in opposing directions. While objectifying self-perceptions are linked to higher levels of sexual behavior, body consciousness during physical intimacy is linked to lower levels of sexual behavior. Based on this knowledge, the present three-wave panel study of 824 Belgian, predominant heterosexual adolescents (M age = 15.33; SD = 1.45) proposes a dual-pathway model that investigates two different pathways through which the internalization of media ideals may impact adolescents' sexual behavior. An inhibitory pathway links media internalization to lower levels of sexual behavior through sexual body consciousness, and a supportive pathway links media internalization to higher levels of sexual behavior through self-objectification. Structural equation analyses supported the proposed dual-pathway, showing that the impact of media internalization on adolescents' sexual behavior proceeds through an inhibitory pathway and a supportive pathway. Regarding the supportive pathway, media internalization (W1) positively predicted sexual behavior (W3), through valuing appearance over competence (W2). Regarding the inhibitory pathway, media internalization (W1) positively predicted body surveillance, which, in turn, positively predicted sexual body consciousness (all W2). Sexual body consciousness (W2) is negatively related to sexual behavior (W3). From a sexual developmental perspective, these findings emphasize the importance of guiding adolescents in interpreting and processing sexualizing media messages.

  10. Strengthening of competence planning truss through instructional media development details

    NASA Astrophysics Data System (ADS)

    Handayani, Sri; Nurcahyono, M. Hadi

    2017-03-01

    Competency-Based Learning is a model of learning in which the planning, implementation, and assessment refers to the mastery of competencies. Learning in lectures conducted in the framework for comprehensively realizing student competency. Competence means the orientation of the learning activities in the classroom must be given to the students to be more active learning, active search for information themselves and explore alone or with friends in learning activities in pairs or in groups, learn to use a variety of learning resources and printed materials, electronic media, as well as environment. Analysis of learning wooden structure known weakness in the understanding of the truss detail. Hence the need for the development of media that can provide a clear picture of what the structure of the wooden horses and connection details. Development of instructional media consisted of three phases of activity, namely planning, production and assessment. Learning Media planning should be tailored to the needs and conditions necessary to provide reinforcement to the mastery of competencies, through the table material needs. The production process of learning media is done by using hardware (hardware) and software (software) to support the creation of a medium of learning. Assessment of the media poduk yan include feasibility studies, namely by subject matter experts, media experts, while testing was done according to the student's perception of the product. The results of the analysis of the materials for the instructional aspects of the results obtained 100% (very good) and media analysis for the design aspects of the media expressed very good with a percentage of 88.93%. While the analysis of student perceptions expressed very good with a percentage of 84.84%. Media Learning Truss Details feasible and can be used in the implementation of learning wooden structure to provide capacity-building in planning truss

  11. Characterization of an impinging jet into porous media

    NASA Astrophysics Data System (ADS)

    Wang, Cong; Alhani, Salwan; Gharib, Morteza

    2015-11-01

    In this work, characteristic behavior of a liquid jet into porous hydrophobic / hydrophilic particle media is investigated. In porous media, the capillary effect becomes significant, especially when the jet Reynolds Number is low. To analyze the cavity creation phenomena, the effect of jet's diameter, speed and acceleration as well as particles' size are carefully studied. Such knowledge of fluid behavior will provide guidance for medicine injection process. This work is supported by Caltech GALCIT STEM program.

  12. 28 CFR 540.47 - Media visits.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 28 Judicial Administration 2 2010-07-01 2010-07-01 false Media visits. 540.47 Section 540.47... PERSONS IN THE COMMUNITY Visiting Regulations § 540.47 Media visits. Requirements for media visits are governed by the provisions on contact with news media (see subpart E of this part). A media...

  13. 28 CFR 540.47 - Media visits.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 28 Judicial Administration 2 2011-07-01 2011-07-01 false Media visits. 540.47 Section 540.47... PERSONS IN THE COMMUNITY Visiting Regulations § 540.47 Media visits. Requirements for media visits are governed by the provisions on contact with news media (see subpart E of this part). A media...

  14. 28 CFR 540.47 - Media visits.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 28 Judicial Administration 2 2014-07-01 2014-07-01 false Media visits. 540.47 Section 540.47... PERSONS IN THE COMMUNITY Visiting Regulations § 540.47 Media visits. Requirements for media visits are governed by the provisions on contact with news media (see subpart E of this part). A media...

  15. 28 CFR 540.47 - Media visits.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 28 Judicial Administration 2 2012-07-01 2012-07-01 false Media visits. 540.47 Section 540.47... PERSONS IN THE COMMUNITY Visiting Regulations § 540.47 Media visits. Requirements for media visits are governed by the provisions on contact with news media (see subpart E of this part). A media...

  16. 28 CFR 540.47 - Media visits.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 28 Judicial Administration 2 2013-07-01 2013-07-01 false Media visits. 540.47 Section 540.47... PERSONS IN THE COMMUNITY Visiting Regulations § 540.47 Media visits. Requirements for media visits are governed by the provisions on contact with news media (see subpart E of this part). A media...

  17. 1986 Index/Directory of Women's Media.

    ERIC Educational Resources Information Center

    Allen, Martha Leslie, Ed.

    This is a directory of women's media, i.e., media primarily owned and operated by and for women. The mission of this annual publication is to aid networking among women, women's organizations, and women's media, both nationally and internationally. The directory includes two sections: women's media groups, and individual media women and…

  18. Media and the making of scientists

    NASA Astrophysics Data System (ADS)

    O'Keeffe, Moira

    This dissertation explores how scientists and science students respond to fictional, visual media about science. I consider how scientists think about images of science in relation to their own career paths from childhood onwards. I am especially interested in the possibility that entertainment media can inspire young people to learn about science. Such inspiration is badly needed, as schools are failing to provide it. Science education in the United States is in a state of crisis. Studies repeatedly find low levels of science literacy in the U.S. This bleak situation exists during a boom in the popularity of science-oriented television shows and science fiction movies. How might entertainment media play a role in helping young people engage with science? To grapple with these questions, I interviewed a total of fifty scientists and students interested in science careers, representing a variety of scientific fields and demographic backgrounds, and with varying levels of interest in science fiction. Most respondents described becoming attracted to the sciences at a young age, and many were able to identify specific sources for this interest. The fact that interest in the sciences begins early in life, demonstrates a potentially important role for fictional media in the process of inspiration, perhaps especially for children without access to real-life scientists. One key aspect to the appeal of fiction about science is how scientists are portrayed as characters. Scientists from groups traditionally under-represented in the sciences often sought out fictional characters with whom they could identify, and viewers from all backgrounds preferred well-rounded characters to the extreme stereotypes of mad or dorky scientists. Genre is another aspect of appeal. Some respondents identified a specific role for science fiction: conveying a sense of wonder. Visual media introduce viewers to the beauty of science. Special effects, in particular, allow viewers to explore the

  19. Instability in poroelastic media

    NASA Astrophysics Data System (ADS)

    Pramanik, Satyajit; Wettlaufer, John

    2016-11-01

    Fluid flow in deformable porous materials, which play significant role in different biological and geological systems of wide range of scales, is a highly nonlinear problem. Feedback from the elastic deformation of the solid skeleton on the fluid flow and vice-versa gives rise to pattern formation in the porosity structure of the skeleton. We view some of these patterns as instabilities of the coupled fluid-solid system. Due to highly nonlinear nature of the problem, very little has been understood about this instability. Here, we use a minimal poroelastic theory to understand the pattern formation in a fluid-saturated poroelastic material and discuss the similarities/differences with viscous fingering in non-deformable porous media.

  20. Acute otitis media.

    PubMed

    Atkinson, Helen; Wallis, Sebastian; Coatesworth, Andrew P

    2015-05-01

    Acute otitis media (AOM) is a common problem facing general practitioners, paediatricians and otolaryngologists. This article reviews the aetiopathogenesis, epidemiology, presentation, natural history, complications and management of AOM. The literature was reviewed by using the PubMed search engine and entering a combination of terms including 'AOM', 'epidemiology' and 'management'. Relevant articles were identified and examined for content. What is the take-home message? AOM is a very common problem affecting the majority of children at least once and places a large burden on health care systems throughout the world. Although symptomatic relief is often enough for most children, more severe and protracted cases require treatment with antibiotics, especially in younger children.

  1. DENSE MEDIA CYCLONE OPTIMIZATION

    SciTech Connect

    Gerald H. Luttrell

    2001-09-10

    The fieldwork associated with Task 1 (Baseline Assessment) was completed this quarter. Detailed cyclone inspections completed at all but one plant during maintenance shifts. Analysis of the test samples is also currently underway in Task 4 (Sample Analysis). A Draft Recommendation was prepared for the management at each test site in Task 2 (Circuit Modification). All required procurements were completed. Density tracers were manufactured and tested for quality control purposes. Special sampling tools were also purchased and/or fabricated for each plant site. The preliminary experimental data show that the partitioning performance for all seven HMC circuits was generally good. This was attributed to well-maintained cyclones and good operating practices. However, the density tracers detected that most circuits suffered from poor control of media cutpoint. These problems were attributed to poor x-ray calibration and improper manual density measurements. These conclusions will be validated after the analyses of the composite samples have been completed.

  2. Porous polymer media

    DOEpatents

    Shepodd, Timothy J.

    2002-01-01

    Highly crosslinked monolithic porous polymer materials for chromatographic applications. By using solvent compositions that provide not only for polymerization of acrylate monomers in such a fashion that a porous 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.

  3. Media Construction of Presidential Campaigns

    ERIC Educational Resources Information Center

    Sperry, Chris; Sperry, Sox

    2007-01-01

    The next American president will likely be the candidate who crafts the best "impression" in the media. It is the job of social studies teachers to help students separate impressions from substance and to understand the role that media play in crafting people's meaning making and shaping their decision making. Social studies teachers can help…

  4. Introduction to Media Literacy History

    ERIC Educational Resources Information Center

    Bordac, Sarah Evelyn

    2014-01-01

    Why is it important for us to consider the history of media literacy? Beyond forging connections of the past to the present, exploring the history of the field can deepen intellectual curiosity and understanding for those who work in media literacy education, ignite interest in others, and drive investigation into understanding the relationships…

  5. Digital Media and Emergent Literacy

    ERIC Educational Resources Information Center

    Hisrich, Katy; Blanchard, Jay

    2009-01-01

    This article discusses digital media and its potential effects on emergent literacy skills development for young children. While the impact of digital media exposure on children's emergent literacy development is largely unknown, it is becoming a significant issue, as more and more young children throughout the world observe and use various forms…

  6. Digital Media Stories for Persuasion

    ERIC Educational Resources Information Center

    Leopold, Lisa

    2010-01-01

    Digital media story-telling (which enhances traditional oral story-telling with images, music, and text) has been a focus of recent scholarship for its potential to produce numerous educational benefits. Through digital media storytelling, students' imagination, creativity, critical thinking, writing, public speaking, and organizational or…

  7. Critical Media Literacy: Commercial Advertising.

    ERIC Educational Resources Information Center

    Henry, Laurie

    Studying the influence of mass media on people's lives allows students to view advertising in a new light. This lesson provides students with the opportunity to look at mass media in a critical way--students become aware of the tremendous amount of advertising that they are exposed to on a daily basis. In the lesson, by looking at advertising…

  8. Developing World and Mass Media.

    ERIC Educational Resources Information Center

    International Organization of Journalists, Prague (Czechoslovakia).

    This volume presents six keynote papers submitted by noted scholars to the Working Group on Mass Media and Developing Nations at the International Scientific Conference of the International Association for Mass Communication Research held at Leipzig, Germany, in September 1974. The following titles are included: "Mass Media and Developing Nations:…

  9. Microcomputers in the Media Center.

    ERIC Educational Resources Information Center

    Sherouse, Vicki, Ed.; Post, Richard, Ed.

    Produced to provide educators and library media personnel with some understanding of and direction in the rapidly expanding field of microcomputers and their applications, this monograph includes several articles dealing specifically with media center applications and others concerned more generally with the microcomputer in educational settings.…

  10. Media and Technology. Section IV.

    ERIC Educational Resources Information Center

    Fiorito, Eunice; And Others

    This document contains three papers about media and technology presented at a national conference on the nonwhite disabled. In "Overcoming" (E. Fiorito and J. Doherty), a comparison is made between treatment of blacks and the disabled as inferior citizens. Ways in which both populations can work more closely with the media to promote awareness and…

  11. Observations on the Mass Media.

    ERIC Educational Resources Information Center

    Graham, Roger J.; Payden, William R.

    Thirty-three articles present observations on how the media operate and how the media have affected society to date. The articles deal with a wide variety of topics, including the editorial page; political cartooning; daily-newspaper starts and suspensions from 1960 to 1969; journalistic ethics; well-known journalists, such as John Dunlap, James…

  12. Enhancing Coach-Media Relations.

    ERIC Educational Resources Information Center

    Staffo, Donald F.

    1989-01-01

    High School and college coaches are offered tips for better coach-media relations. Suggestions are given for making the media's job easier, thus resulting in better coverage. A sample format for a Post-Game Fact Sheet is included. (IAH)

  13. Particle Deposition in Granular Media

    SciTech Connect

    Tien, C.

    1992-01-01

    Objective is to understand aerosol deposition from gas streams flowing through granular media; this is important to the design of granular filtration systems. The following investigations were carried out: transient behavior of granular filtration of aerosols, and stochastic simulation of aerosol deposition in granular media.

  14. [Social media, children and pediatricians].

    PubMed

    Le Heuzey, M-F

    2012-01-01

    Using social media web sites is a common activity for children, and any site that allows social interaction (social network, games, virtual worlds...) is a social media site. Pediatricians are in a position to help families understand the benefits and the risks of these sites, and to diagnose problems in children and adolescents as cyberbullying, depression, and post traumatic disorder.

  15. "Media Now"--and Forever

    ERIC Educational Resources Information Center

    Carpenter, Iris

    1978-01-01

    Students in a course called "Media Now" in a Washington, D.C., high school use various media hardware and production techniques to film and record their own television commercials, with emphasis on becoming more discerning about the effect that mass communications have on people's lives. (MF)

  16. Assessing Cross-Media Impacts

    ERIC Educational Resources Information Center

    Reiquam, Howard; And Others

    1975-01-01

    Using 1000 MW coal-fired central power stations as an example, the impacts upon other media (land, air, water) are analyzed when controls are imposed on one medium. The development of a methodology for assessing the cross-media impact of specific control technologies or strategies is illustrated. (Author/BT)

  17. Military Engagement with Social Media

    DTIC Science & Technology

    2011-05-06

    mobile technology . The use of anonymous phones and prepaid phone cards helps the organizations avoid any detection by government and intelligence... mobile technology and social media. The social media tools have also been used to recruit and organize potential supporters around the world

  18. Engaging Students with Social Media

    ERIC Educational Resources Information Center

    Bal, Anjali S.; Grewal, Dhruv; Mills, Adam; Ottley, Gary

    2015-01-01

    The importance of social media for marketing professionals has grown immensely as consumers turn to it to connect with products, brands, and brand communities. Yet limited research investigates the uses of social media to teach core marketing concepts. This article analyzes coursework in foundational marketing classes, with a specific focus on the…

  19. Social Media in Music Education

    ERIC Educational Resources Information Center

    Albert, Daniel J.

    2015-01-01

    Students in the United States use technology and social media platforms for both educational and noneducational purposes. Integration of social media in music education classes can help facilitate learning experiences that would be less likely to happen in a brick-and-mortar setting. However, issues such as privacy and cyberbullying continue to…

  20. The Future of Educational Media.

    ERIC Educational Resources Information Center

    Wason, Walter P.

    Electronic media, particularly television, influence children to develop composite, plastic personalities striving after unreal goals, but the teacher can help children identify and develop rational goals and role models without completely abandoning media. Television has influenced children, and many adults, to create personalities assembled from…