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Sample records for coring fluids

  1. Lunar Fluid Core and Solid-Body Tides

    NASA Technical Reports Server (NTRS)

    Williams, J. G.; Boggs, D. H.; Ratcliff, J. T.

    2005-01-01

    Variations in rotation and orientation of the Moon are sensitive to solid-body tidal dissipation, dissipation due to relative motion at the fluid-core/solid-mantle boundary, and tidal Love number k2 [1,2]. There is weaker sensitivity to flattening of the core-mantle boundary (CMB) [2-5] and fluid core moment of inertia [1]. Accurate Lunar Laser Ranging (LLR) measurements of the distance from observatories on the Earth to four retroreflector arrays on the Moon are sensitive to lunar rotation and orientation variations and tidal displacements. Past solutions using the LLR data have given results for dissipation due to solid-body tides and fluid core [1] plus Love number [1-5]. Detection of CMB flattening has been improving [3,5] and now seems significant. This strengthens the case for a fluid lunar core.

  2. Density Stratification in Rotating Spherical Fluid Shells: Application to the Earth's Fluid Core

    NASA Astrophysics Data System (ADS)

    Kamruzzaman, M.

    2015-12-01

    The Earth's outer core is a rotating ellipsoidal shell of compressible, stratified and self-gravitating fluid. The Galerkin method is applied to study the effects of density stratification on the frequencies of the inertial modes for a compressible shell proportional to the realistic Earth's fluid core. The inertial modes of the core are the free oscillations with periods longer than half of a day and have the Coriolis force as their restoring force. Historically an incompressible and homogeneous fluid sphere is considered to study these modes and analytical solutions are known for the frequencies and the displacement eigenfunctions of this model. The three potential description (3PD) is used to a compressible and stratified fluid core model with different stratification parameters β, related to the local Brunt-Väisälä frequency. As a first approximation, however, we ignore the ellipticity of the core's figure. The 3PD scheme describes the exact linearized dynamics of rotating, self-gravitating, stratified, compressible and inviscid fluids. We show that, depending on the size of β, some modal frequencies and eigenfunctions are practically unaffected by stratification, some are changed and some modes may disappear. We also first derive the web of characteristics, which gives more information about the eigenfunctions of these modes, as functions of frequency and stratification for compressible and inviscid fluids.

  3. Fluid flow near the surface of earth's outer core

    NASA Technical Reports Server (NTRS)

    Bloxham, Jeremy; Jackson, Andrew

    1991-01-01

    This review examines the recent attempts at extracting information on the pattern of fluid flow near the surface of the outer core from the geomagnetic secular variation. Maps of the fluid flow at the core surface are important as they may provide some insight into the process of the geodynamo and may place useful constraints on geodynamo models. In contrast to the case of mantle convection, only very small lateral variations in core density are necessary to drive the flow; these density variations are, by several orders of magnitude, too small to be imaged seismically; therefore, the geomagnetic secular variation is utilized to infer the flow. As substantial differences exist between maps developed by different researchers, the possible underlying reasons for these differences are examined with particular attention given to the inherent problems of nonuniqueness.

  4. Fluid flow near the surface of earth's outer core

    NASA Technical Reports Server (NTRS)

    Bloxham, Jeremy; Jackson, Andrew

    1991-01-01

    This review examines the recent attempts at extracting information on the pattern of fluid flow near the surface of the outer core from the geomagnetic secular variation. Maps of the fluid flow at the core surface are important as they may provide some insight into the process of the geodynamo and may place useful constraints on geodynamo models. In contrast to the case of mantle convection, only very small lateral variations in core density are necessary to drive the flow; these density variations are, by several orders of magnitude, too small to be imaged seismically; therefore, the geomagnetic secular variation is utilized to infer the flow. As substantial differences exist between maps developed by different researchers, the possible underlying reasons for these differences are examined with particular attention given to the inherent problems of nonuniqueness.

  5. Elusiveness of Fluid-Fluid Demixing in Additive Hard-Core Mixtures

    NASA Astrophysics Data System (ADS)

    Lafuente, Luis; Cuesta, José A.

    2002-09-01

    The conjecture that when an additive hard-core mixture phase separates when one of the phases is spatially ordered, well supported by considerable evidence, is in contradiction with some simulations of a binary mixture of hard cubes on cubic lattices. By extending Rosenfeld's fundamental measure theory to lattice models we show that the phase behavior of this mixture is far more complex than simulations show, exhibiting regions of stability of several smectic, columnar, and solid phases, but no fluid-fluid demixing. A comparison with the simulations show that they are, in fact, compatible with a fluid-columnar demixing transition, thus bringing this model into the same demixing scheme as the rest of additive hard-core mixtures.

  6. Some anticipated contributions to core fluid dynamics from the GRM

    NASA Technical Reports Server (NTRS)

    Vanvorhies, C.

    1985-01-01

    It is broadly maintained that the secular variation (SV) of the large scale geomagnetic field contains information on the fluid dynamics of Earth's electrically conducting outer core. The electromagnetic theory appropriate to a simple Earth model has recently been combined with reduced geomagnetic data in order to extract some of this information and ascertain its significance. The simple Earth model consists of a rigid, electrically insulating mantle surrounding a spherical, inviscid, and perfectly conducting liquid outer core. This model was tested against seismology by using truncated spherical harmonic models of the observed geomagnetic field to locate Earth's core-mantle boundary, CMB. Further electromagnetic theory has been developed and applied to the problem of estimating the horizontal fluid motion just beneath CMB. Of particular geophysical interest are the hypotheses that these motions: (1) include appreciable surface divergence indicative of vertical motion at depth, and (2) are steady for time intervals of a decade or more. In addition to the extended testing of the basic Earth model, the proposed GRM provides a unique opportunity to test these dynamical hypotheses.

  7. Mean-field fluid behavior of the gaussian core model

    PubMed

    Louis; Bolhuis; Hansen

    2000-12-01

    We show that the Gaussian core model of particles interacting via a penetrable repulsive Gaussian potential, first considered by Stillinger [J. Chem. Phys. 65, 3968 (1976)], behaves as a weakly correlated "mean-field fluid" over a surprisingly wide density and temperature range. In the bulk, the structure of the fluid phase is accurately described by the random phase approximation for the direct correlation function, and by the more sophisticated hypernetted chain integral equation. The resulting pressure deviates very little from a simple mean-field-like quadratic form in the density, while the low density virial expansion turns out to have an extremely small radius of convergence. Density profiles near a hard wall are also very accurately described by the corresponding mean-field free-energy functional. The binary version of the model exhibits a spinodal instability against demixing at high densities. Possible implications for semidilute polymer solutions are discussed.

  8. Mean-field fluid behavior of the Gaussian core model

    NASA Astrophysics Data System (ADS)

    Louis, A. A.; Bolhuis, P. G.; Hansen, J. P.

    2000-12-01

    We show that the Gaussian core model of particles interacting via a penetrable repulsive Gaussian potential, first considered by Stillinger [J. Chem. Phys. 65, 3968 (1976)], behaves as a weakly correlated ``mean-field fluid'' over a surprisingly wide density and temperature range. In the bulk, the structure of the fluid phase is accurately described by the random phase approximation for the direct correlation function, and by the more sophisticated hypernetted chain integral equation. The resulting pressure deviates very little from a simple mean-field-like quadratic form in the density, while the low density virial expansion turns out to have an extremely small radius of convergence. Density profiles near a hard wall are also very accurately described by the corresponding mean-field free-energy functional. The binary version of the model exhibits a spinodal instability against demixing at high densities. Possible implications for semidilute polymer solutions are discussed.

  9. Review of coaxial flow gas core nuclear rocket fluid mechanics

    NASA Technical Reports Server (NTRS)

    Weinstein, H.

    1976-01-01

    Almost all of the fluid mechanics research associated with the coaxial flow gas core reactor ended abruptly with the interruption of NASA's space nuclear program because of policy and budgetary considerations in 1973. An overview of program accomplishments is presented through a review of the experiments conducted and the analyses performed. Areas are indicated where additional research is required for a fuller understanding of cavity flow and of the factors which influence cold and hot flow containment. A bibliography is included with graphic material.

  10. Discrete perturbation theory for continuous soft-core potential fluids.

    PubMed

    Cervantes, L A; Jaime-Muñoz, G; Benavides, A L; Torres-Arenas, J; Sastre, F

    2015-03-21

    In this work, we present an equation of state for an interesting soft-core continuous potential [G. Franzese, J. Mol. Liq. 136, 267 (2007)] which has been successfully used to model the behavior of single component fluids that show some water-type anomalies. This equation has been obtained using discrete perturbation theory. It is an analytical expression given in terms of density, temperature, and the set of parameters that characterize the intermolecular interaction. Theoretical results for the vapor-liquid phase diagram and for supercritical pressures are compared with previous and new simulation data and a good agreement is found. This work also clarifies discrepancies between previous Monte Carlo and molecular dynamics simulation results for this potential.

  11. Two-fluid models of superfluid neutron star cores

    NASA Astrophysics Data System (ADS)

    Chamel, N.

    2008-08-01

    Both relativistic and non-relativistic two-fluid models of neutron star cores are constructed, using the constrained variational formalism developed by Brandon Carter and co-workers. We consider a mixture of superfluid neutrons and superconducting protons at zero temperature, taking into account mutual entrainment effects. Leptons, which affect the interior composition of the neutron star and contribute to the pressure, are also included. We provide the analytic expression of the Lagrangian density of the system, the so-called master function, from which the dynamical equations can be obtained. All the microscopic parameters of the models are calculated consistently using the non-relativistic nuclear energy density functional theory. For comparison, we have also considered relativistic mean field models. The correspondence between relativistic and non-relativistic hydrodynamical models is discussed in the framework of the recently developed 4D covariant formalism of Newtonian multifluid hydrodynamics. We have shown that entrainment effects can be interpreted in terms of dynamical effective masses that are larger in the relativistic case than in the Newtonian case. With the nuclear models considered in this work, we have found that the neutron relativistic effective mass is even greater than the bare neutron mass in the liquid core of neutron stars.

  12. Equation of state and critical point behavior of hard-core double-Yukawa fluids

    NASA Astrophysics Data System (ADS)

    Montes, J.; Robles, M.; López de Haro, M.

    2016-02-01

    A theoretical study on the equation of state and the critical point behavior of hard-core double-Yukawa fluids is presented. Thermodynamic perturbation theory, restricted to first order in the inverse temperature and having the hard-sphere fluid as the reference system, is used to derive a relatively simple analytical equation of state of hard-core multi-Yukawa fluids. Using such an equation of state, the compressibility factor and phase behavior of six representative hard-core double-Yukawa fluids are examined and compared with available simulation results. The effect of varying the parameters of the hard-core double-Yukawa intermolecular potential on the location of the critical point is also analyzed using different perspectives. The relevance of this analysis for fluids whose molecules interact with realistic potentials is also pointed out.

  13. Equation of state and critical point behavior of hard-core double-Yukawa fluids.

    PubMed

    Montes, J; Robles, M; López de Haro, M

    2016-02-28

    A theoretical study on the equation of state and the critical point behavior of hard-core double-Yukawa fluids is presented. Thermodynamic perturbation theory, restricted to first order in the inverse temperature and having the hard-sphere fluid as the reference system, is used to derive a relatively simple analytical equation of state of hard-core multi-Yukawa fluids. Using such an equation of state, the compressibility factor and phase behavior of six representative hard-core double-Yukawa fluids are examined and compared with available simulation results. The effect of varying the parameters of the hard-core double-Yukawa intermolecular potential on the location of the critical point is also analyzed using different perspectives. The relevance of this analysis for fluids whose molecules interact with realistic potentials is also pointed out.

  14. Nonlinear fluid equations for fully toroidal electromagnetic waves for the core tokamak plasma

    NASA Astrophysics Data System (ADS)

    Weiland, J.; Liu, C. S.; Liu

    2013-12-01

    The rather general set of fluid equations with full curvature effects (Shukla and Weiland, Phys. Rev. A 40, 341 (1989)) has been modified to apply to the core and generalized to include also microtearing modes.

  15. Influence of a Fluid Lunar Core on the Moons Orientation

    NASA Technical Reports Server (NTRS)

    Williams, J. G.; Boggs, D. H.; Ratcliff, J. T.; Yoder, C. F.; Dickey, J. O.

    2001-01-01

    Oblateness of and dissipation at the lunar liquid-core/solid-mantle boundary affects the precession of core and mantle. Analysis of Lunar Laser ranges gives a weak detection of oblateness and a strong determination of dissipation. Additional information is contained in the original extended abstract.

  16. Power-law rheology and flow behavior of low-invasion coring fluids

    SciTech Connect

    McGuire, P.L.

    1981-08-01

    An improved pressure coring system has been developed in which an extremely viscous polymer mud is extruded by the core and is used to seal and protect the core from flushing by drilling fluids. The polymer mud must be extremely viscous to minimize invasion, yet must be extruded through a long, narrow annular gap with a minimum of pressure buildup. A highly non-Newtonian shear-thinning polymer is utilized in the low invasion coring fluid. This paper describes the measurement and modeling of non-Newtonian rheology from rotary viscometer data in detail since the simplified equations which are generally used with these instruments can be grossly in error. The development of both an approximate analytical solution and an exact numerical solution of the non-Newtonian extrusion process is presented. These solutions were used to optimize the non-Newtonian rheology of the low-invasion fluid which will be used in actual coring operations.

  17. Effects of irrigation fluid temperature on core body temperature during transurethral resection of the prostate.

    PubMed

    Jaffe, J S; McCullough, T C; Harkaway, R C; Ginsberg, P C

    2001-06-01

    To determine the effect irrigation fluid temperature has on core body temperature changes in patients undergoing transurethral resection of the prostate (TURP). Fifty-six male patients (mean age 71.2 +/- 8.2 years) scheduled for TURP were enrolled in the study. Patients were randomized to one of two groups. Group 1 consisted of 27 patients who received room temperature irrigation fluid (70 degrees F) throughout TURP; group 2 consisted of 29 patients whose procedure was performed with warmed irrigation fluid (91.5 degrees F). The irrigation fluid used for both groups was glycine. The baseline temperature, final temperature, total time in the operating room, and amount of irrigation fluid used during the procedure were recorded for each patient. No significant difference in the average time spent in the operating room or in the total irrigation fluid used between the two groups was observed. Of the 27 patients who received room temperature irrigation fluid, 15 (55.6%) had a decrease in body temperature. A decrease in temperature was observed in 21 (72.4%) of the 29 patients who received warm irrigation fluid. Groups 1 and 2 had 12 (44.4%) of 27 and 8 (27.6%) of 29 patients, respectively, who demonstrated an elevation in their core body temperature. The results of our study suggest that irrigation fluid temperature is not a factor responsible for altering the core body temperature in patients undergoing TURP.

  18. Fluids circulations during the formation of the Naxos Metamorphic Core Complex (Greece)

    NASA Astrophysics Data System (ADS)

    Vanderhaeghe, Olivier; Boiron, Marie-Christine; Siebenaller, Luc

    2015-04-01

    The island of Naxos, in the central part of the Cycladic Metamorphic Core Complex (Greece) represents a perfect example to address the evolution of fluid circulations during collapse of an orogenic belt. It displays a complex detachment system characterized by mylonites, cataclasites and high-angle normal faults which geometric relationships reflect rheological layering of the orogenic crust and its evolution during collapse. The chemistry of fluid inclusions determined by microthermometry, RAMAN spectroscopy, LA-ICPMS, and crush-leach combined with C and H isotopic signatures point to three distinct types of fluids, namely (i) a H2O-dominated fluid, (ii) a composite H2O-CO2 fluid, and (iii) a NaCl-rich fluid concentrated in metals. These different types of fluids are interpreted to reflect mixtures to various degrees among fluids generated by (i) condensation of clouds (meteoric aqueous fluid), (ii) dehydration and decarbonatation of metasedimentary rocks during metamorphism (metamorphic aqueous-carbonic fluid), and (iii) crystallization of granitic magmas (magmatic saline fluid with high metal contents). The distribution of fluids with respect to microstructures evidences the close link between deformation and fluid circulations at the mineral scale from intracristalline deformation to fracturing. The orientation of fluid inclusion planes, veins and alteration zones allows to identify the scale and geometry of the reservoir into which fluids are circulating and their evolution during the formation of the Metamorphic Core Complex. These data indicate that the orogenic crust is subdivided in two reservoirs separated by the ductile/fragile transition. Meteoric fluids circulate in the upper crust affected by brittle deformation whereas metamorphic and magmatic fluids circulate in relation to intracristalline ductile deformation affecting the lower crust. The geometry of these reservoirs evolves during the formation of the Naxos Metamorphic Core Complex as the

  19. Turbulence coefficients and stability studies for the coaxial flow or dissimiliar fluids. [gaseous core nuclear reactors

    NASA Technical Reports Server (NTRS)

    Weinstein, H.; Lavan, Z.

    1975-01-01

    Analytical investigations of fluid dynamics problems of relevance to the gaseous core nuclear reactor program are presented. The vortex type flow which appears in the nuclear light bulb concept is analyzed along with the fluid flow in the fuel inlet region for the coaxial flow gaseous core nuclear reactor concept. The development of numerical methods for the solution of the Navier-Stokes equations for appropriate geometries is extended to the case of rotating flows and almost completes the gas core program requirements in this area. The investigations demonstrate that the conceptual design of the coaxial flow reactor needs further development.

  20. Hard sphere perturbation theory for fluids with soft-repulsive-core potentials

    NASA Astrophysics Data System (ADS)

    Ben-Amotz, Dor; Stell, George

    2004-03-01

    The thermodynamic properties of fluids with very soft repulsive-core potentials, resembling those of some liquid metals, are predicted with unprecedented accuracy using a new first-order thermodynamic perturbation theory. This theory is an extension of Mansoori-Canfield/Rasaiah-Stell (MCRS) perturbation theory, obtained by including a configuration integral correction recently identified by Mon, who evaluated it by computer simulation. In this work we derive an analytic expression for Mon's correction in terms of the radial distribution function of the soft-core fluid, g0(r), approximated using Lado's self-consistent extension of Weeks-Chandler-Andersen (WCA) theory. Comparisons with WCA and MCRS predictions show that our new extended-MCRS theory outperforms other first-order theories when applied to fluids with very soft inverse-power potentials (n⩽6), and predicts free energies that are within 0.3kT of simulation results up to the fluid freezing point.

  1. Agitation in Dementia: Relation to Core Cerebrospinal Fluid Biomarker Levels

    PubMed Central

    Bloniecki, Victor; Aarsland, Dag; Cummings, Jeffrey; Blennow, Kaj; Freund-Levi, Yvonne

    2014-01-01

    Background The objective of this study was to examine the associations of agitation with the cerebrospinal fluid dementia biomarkers total-tau (T-tau), phosphorylated-tau (P-tau) and Aβ1-42. Methods One hundred patients (mean age ± SD, 78.6 ± 7.5 years) with dementia and neuropsychiatric symptoms, of whom 67% were female, were included. Agitation was measured using the Cohen-Mansfield Agitation Inventory (CMAI; 46.5 ± 11.8 points). Results Total CMAI correlated with T-tau [rs (31) = 0.36, p = 0.04] and P-tau [rs (31) = 0.35, p = 0.05] in patients with Alzheimer's disease (AD; n = 33) but not in the total dementia population (n = 95). Conclusions Our results suggest that tau-mediated pathology including neurofibrillary tangles and the intensity of the disease process might be associated with agitation in AD. PMID:25298777

  2. Highly responsive core-shell microactuator arrays for use in viscous and viscoelastic fluids

    NASA Astrophysics Data System (ADS)

    Fiser, Briana L.; Shields, Adam R.; Falvo, M. R.; Superfine, R.

    2015-02-01

    We present a new fabrication method to produce arrays of highly responsive polymer-metal core-shell magnetic microactuators. The core-shell fabrication method decouples the elastic and magnetic structural components such that the actuator response can be optimized by adjusting the core-shell geometry. Our microstructures are 10 µm long, 550 nm in diameter, and electrochemically fabricated in particle track-etched membranes, comprising a poly(dimethylsiloxane) core with a 100 nm Ni shell surrounding the upper 3-8 µm. The structures can achieve deflections of nearly 90° with moderate magnetic fields and are capable of driving fluid flow in a fluid 550 times more viscous than water.

  3. Highly responsive core-shell microactuator arrays for use in viscous and viscoelastic fluids

    PubMed Central

    Fiser, Briana L.; Shields, Adam R.; Falvo, M. R.; Superfine, R.

    2015-01-01

    We present a new fabrication method to produce arrays of highly responsive polymer-metal core-shell magnetic microactuators. The core-shell fabrication method decouples the elastic and magnetic structural components such that the actuator response can be optimized by adjusting the core-shell geometry. Our microstructures are 10 μm long, 550 nm in diameter, and electrochemically fabricated in particle track-etched membranes, comprising a poly(dimethylsiloxane) core with a 100 nm Ni shell surrounding the upper 3–8 μm. The structures can achieve deflections of nearly 90° with moderate magnetic fields and are capable of driving fluid flow in a fluid 550 times more viscous than water. PMID:26405376

  4. Magnetic field sensor based on selectively magnetic fluid infiltrated dual-core photonic crystal fiber

    NASA Astrophysics Data System (ADS)

    Gangwar, Rahul Kumar; Bhardwaj, Vanita; Singh, Vinod Kumar

    2016-02-01

    We reported the modeling result of selectively magnetic fluid infiltrated dual-core photonic crystal fiber based magnetic field sensor. Inside the cross-section of the designed photonic crystal fiber, the two fiber cores filled with magnetic fluid (Fe3O4) form two independent waveguides with mode coupling. The mode coupling under different magnetic field strengths is investigated theoretically. The sensitivity of the sensor as a function of the structural parameters of the photonic crystal fiber is calculated. The result shows that the proposed sensing device with 1 cm photonic crystal fiber length has a large sensitivity of 305.8 pm/Oe.

  5. Expected contribution of the Geopotential Research Mission (GRM) to studies of liquid core fluid dynamics

    NASA Technical Reports Server (NTRS)

    Benton, E. R.

    1985-01-01

    Finding satisfactory models of the fluid motions at the top of the core is important for delineating what kind of dynamo is in operation, for estimating the heat flux into the base of the mantle, and for forecasting the magnetic field forward in time. Each of these aspects will be discussed.

  6. Does prehospital fluid administration impact core body temperature and coagulation functions in combat casualties?

    PubMed

    Farkash, Uri; Lynn, Mauricio; Scope, Alon; Maor, Ron; Turchin, Nickolai; Sverdlik, Borris; Eldad, Arieh

    2002-03-01

    Administration of large amounts of fluids to trauma patients, in the absence of surgical control, may increase bleeding, cause hypothermia and coagulopathy which may worsen the bleeding and increase morbidity and mortality. The purpose of our study is to examine the impact of prehospital fluid administration to military combat casualties on core body temperature and coagulation functions. Prospective data were collected on all cases of moderately (9 < or = ISS < or = 14) and severely (ISS > or = 16) injured victims wounded in South Lebanon, treated by Israeli military physicians and evacuated to hospitals in Israel, over a two-year period. Data regarding prehospital phase of injury (timetables, amount of fluids) and upon hospital arrival (initial core body temperature, prothrombin time [PT], partial thromboplastin time [PTT]) were examined for monotonic relation using Spearman's non-parametric test. Fifty-three moderately injured and 31 severely injured patients were included in the study. The average evacuation time for the moderately injured group was 109.3 +/- 44.8 min, and for the severely injured 100.3 +/- 38.4 min (P value=NS). The mean volume of fluids administered was 2.39 +/- 1.52 and 2.49 +/- 1.47 l, respectively (P=NS). No statistical correlation was found between core body temperature, PT or PTT, measured upon hospital arrival, and prehospital fluid treatment. In addition, no correlation was found between core body temperature on hospital arrival and prehospital time, or between prehospital fluid volumes and prehospital time. The mean core body temperature of the moderately injured patients was 36.8 degrees C, and that of severely injured was 35.8 degrees C (P=0.026). With proper control of blood loss and avoidance of excessive fluid administration, moderately and severely injured combat casualties in 'low intensity conflict' in South Lebanon can be resuscitated with fluid volumes that do not result in a coagulation deficit or hypothermia. The core body

  7. Effect of irrigation fluid temperature on core body temperature and inflammatory response during arthroscopic shoulder surgery.

    PubMed

    Pan, Xiaoyun; Ye, Luyou; Liu, Zhongtang; Wen, Hong; Hu, Yuezheng; Xu, Xinxian

    2015-08-01

    This study was designed to evaluate the influence of irrigation fluid on the patients' physiological response to arthroscopic shoulder surgery. Patients who were scheduled for arthroscopic shoulder surgery were prospectively included in this study. They were randomly assigned to receive warm arthroscopic irrigation fluid (Group W, n = 33) or room temperature irrigation fluid (Group RT, n = 33) intraoperatively. Core body temperature was measured at regular intervals. The proinflammatory cytokines TNF-α, IL-1, IL-6, and IL-10 were measured in drainage fluid and serum. The changes of core body temperatures in Group RT were similar with those in Group W within 15 min after induction of anesthesia, but the decreases in Group RT were significantly greater after then. The lowest temperature was 35.1 ± 0.4 °C in Group RT and 35.9 ± 0.3 °C in Group W, the difference was statistically different (P < 0.05). Hypothermia occurred in 31 out of 33 subjects in Group RT (31/33; 94 %), but was significantly lower in Group W (9/24; 27 %; P < 0.05). Serum TNF-α changes were undetectable postoperatively. No statistical significant differences in serum IL-1 and serum IL-10 levels were observed between groups. Serum IL-6 levels were significantly lower in Group W (P < 0.05). The levels of the above cytokines in drainage fluid were all significantly lower in Group W after surgery (P < 0.05). Hypothermia occurs more often in arthroscopic shoulder surgery by using room temperature irrigation fluid compared with warm irrigation fluid. And local inflammatory response is significantly reduced by using warm irrigation fluid. It seems that warm irrigation fluid is more recommendable for arthroscopic shoulder surgery.

  8. Voluntary fluid intake and core temperature responses in adolescent tennis players: sports beverage versus water

    PubMed Central

    Bergeron, M F; Waller, J L; Marinik, E L

    2006-01-01

    Objective To examine differences in ad libitum fluid intake, comparing a 6% carbohydrate/electrolyte drink (CHO‐E) and water, and associated differences in core temperature and other selected physiological and perceptual responses in adolescent athletes during tennis training in the heat. Methods Fourteen healthy, fit, young tennis players (nine male; five female; mean (SD) age 15.1 (1.4) years; weight 60.6 (8.3) kg; height 172.8 (8.6) cm) completed two 120 minute tennis specific training sessions on separate days (randomised, crossover design) in a warm environment (wet bulb globe temperature: CHO‐E, 79.3 (2.6) °F; water, 79.9 (2.2) °F; p>0.05). Results There were no significant differences (p>0.05) between the trials with respect to fluid intake, urine volume, fluid retention, sweat loss, perceived exertion, thirst, or gastrointestinal discomfort. However, there was a difference (p<0.05) in the percentage body weight change after training (CHO‐E, −0.5 (0.7)%; water, −0.9 (0.6)%). Urine specific gravity before training (CHO‐E, 1.024 (0.006); water, 1.025 (0.005)) did not correlate significantly (p>0.05) with any of these measurements or with core body temperature. In examining the main effect for trial, the CHO‐E trial showed a significantly lower (p<0.001) mean body temperature (irrespective of measurement time) than the water trial. However, the mean body temperature in each trial was not associated (p>0.05) with fluid intake, fluid retention, sweat loss, or percentage body weight change. Conclusion Ad libitum consumption of a CHO‐E drink may be more effective than water in minimising fluid deficits and mean core temperature responses during tennis and other similar training in adolescent athletes. PMID:16632570

  9. Voluntary fluid intake and core temperature responses in adolescent tennis players: sports beverage versus water.

    PubMed

    Bergeron, M F; Waller, J L; Marinik, E L

    2006-05-01

    To examine differences in ad libitum fluid intake, comparing a 6% carbohydrate/electrolyte drink (CHO-E) and water, and associated differences in core temperature and other selected physiological and perceptual responses in adolescent athletes during tennis training in the heat. Fourteen healthy, fit, young tennis players (nine male; five female; mean (SD) age 15.1 (1.4) years; weight 60.6 (8.3) kg; height 172.8 (8.6) cm) completed two 120 minute tennis specific training sessions on separate days (randomised, crossover design) in a warm environment (wet bulb globe temperature: CHO-E, 79.3 (2.6) degrees F; water, 79.9 (2.2) degrees F; p>0.05). There were no significant differences (p>0.05) between the trials with respect to fluid intake, urine volume, fluid retention, sweat loss, perceived exertion, thirst, or gastrointestinal discomfort. However, there was a difference (p<0.05) in the percentage body weight change after training (CHO-E, -0.5 (0.7)%; water, -0.9 (0.6)%). Urine specific gravity before training (CHO-E, 1.024 (0.006); water, 1.025 (0.005)) did not correlate significantly (p>0.05) with any of these measurements or with core body temperature. In examining the main effect for trial, the CHO-E trial showed a significantly lower (p<0.001) mean body temperature (irrespective of measurement time) than the water trial. However, the mean body temperature in each trial was not associated (p>0.05) with fluid intake, fluid retention, sweat loss, or percentage body weight change. Ad libitum consumption of a CHO-E drink may be more effective than water in minimising fluid deficits and mean core temperature responses during tennis and other similar training in adolescent athletes.

  10. Bacterial study of Vostok drilling fluid: the tool to make ice core finding confident

    NASA Astrophysics Data System (ADS)

    Alekhina, I. A.; Petit, J. R.; Lukin, V. V.; Bulat, S. A.

    2003-04-01

    Decontamination of Vostok ice core is a critical issue in molecular biology studies. Core surface contains a film of hardly removable 'dirty' drilling fluid representing a mixture of polyhydrocarbons (PHC) including polyaromatic hydrocarbons (PAH) and freon. To make ice microbial finding more confident the original Vostok drilling fluid sampled from different depths (110m - 3600m) was analyzed for bacterial content by ribosomal DNA sequencing. Total, 33 clones of 16S ribosomal DNA were recovered from four samples of drilling fluid at 110, 2750, 3400, and 3600m leading to identification of 8 bacterial species. No overlapping was observed even for neighboring samples (3400m and 3600m). At present four major bacteria with the titer more than 103-104 cells per ml (as estimated from PCR results) are identified. Among them we found: unknown representative of Desulfobacteraceae which are able to oxidize sulphates and degrade benzenes (110m); PAH-degrading alpha-proteobacterium Sphingomonas natatoria (3400m); alpha-proteobacterium representing closely-related group of Sphingomonas sp. (e.g., S. aurantiaca) which are able to degrade PAH as well, and human pathogen closely related to Haloanella gallinarum of CFB group (3600m). Four additional species were revealed as single clones and showed relatedness to human pathogens and saprophytes as well as soil bacteria. These bacteria may represent drilling fluid contaminants introduced during its sampling or DNA extraction procedure. Of four major bacteria revealed, one species, Sphingomonas natatoria, has been met by us in the Vostok core from 3607 m depth (AF532054) whereas another Sphingomonas sp. which we refer to as S. aurantiaca was found in Antarctic microbial endolithic community (AF548567), hydrocarbon-containing soil near Scott Base in Antarctica (AF184221) and even isolated from 3593m Vostok accretion ice (AF324199) and Taylor Dome core (AF395031). The source for major human pathogen-related bacteria is rather uncertain

  11. On the coupling of fluid dynamics and electromagnetism at the top of the earth's core

    NASA Technical Reports Server (NTRS)

    Benton, E. R.

    1985-01-01

    A kinematic approach to short-term geomagnetism has recently been based upon pre-Maxwell frozen-flux electromagnetism. A complete dynamic theory requires coupling fluid dynamics to electromagnetism. A geophysically plausible simplifying assumption for the vertical vorticity balance, namely that the vertical Lorentz torque is negligible, is introduced and its consequences are developed. The simplified coupled magnetohydrodynamic system is shown to conserve a variety of magnetic and vorticity flux integrals. These provide constraints on eligible models for the geomagnetic main field, its secular variation, and the horizontal fluid motions at the top of the core, and so permit a number of tests of the underlying assumptions.

  12. All-fiber magnetic field sensor based on tapered thin-core fiber and magnetic fluid.

    PubMed

    Zhang, Junying; Qiao, Xueguang; Yang, Hangzhou; Wang, Ruohui; Rong, Qiangzhou; Lim, Kok-Sing; Ahmad, Harith

    2017-01-10

    A method for the measurement of a magnetic field by combining a tapered thin-core fiber (TTCF) and magnetic fluid is proposed and experimentally demonstrated. The modal interference effect is caused by the core mode and excited eigenmodes in the TTCF cladding. The transmission spectra of the proposed sensor are measured and theoretically analyzed at different magnetic field strengths. The results field show that the magnetic sensitivity reaches up to -0.1039  dB/Oe in the range of 40-1600 e. The proposed method possesses high sensitivity and low cost compared with other expensive methods.

  13. Directed Fluid Flow Produced by Arrays of Magnetically Actuated Core-Shell Biomimetic Cilia

    NASA Astrophysics Data System (ADS)

    Fiser, B. L.; Shields, A. R.; Evans, B. A.; Superfine, R.

    2010-03-01

    We have developed a novel core-shell microstructure that we use to fabricate arrays of flexible, magnetically actuated biomimetic cilia. Our biomimetic cilia mimic the size and beat shape of biological cilia in order to replicate the transport of fluid driven by cilia in many biological systems including the determination of left-right asymmetry in the vertebrate embryonic nodal plate and mucociliary clearance in the lung. Our core-shell structures consist of a flexible poly(dimethylsiloxane) (PDMS) core surrounded by a shell of nickel approximately forty nanometers thick; by using a core-shell structure, we can tune the mechanical and magnetic properties independently. We present the fabrication process and the long-range transport that occurs above the beating biomimetic cilia tips and will report on progress toward biomimetic cilia induced flow in viscoelastic fluids similar to mucus in the human airway. These flows may have applications in photonics and microfluidics, and our structures may be further useful as sensors or actuators in microelectromechanical systems.

  14. SAPHIR: a physiome core model of body fluid homeostasis and blood pressure regulation.

    PubMed

    Thomas, S Randall; Baconnier, Pierre; Fontecave, Julie; Françoise, Jean-Pierre; Guillaud, François; Hannaert, Patrick; Hernández, Alfredo; Le Rolle, Virginie; Mazière, Pierre; Tahi, Fariza; White, Ronald J

    2008-09-13

    We present the current state of the development of the SAPHIR project (a Systems Approach for PHysiological Integration of Renal, cardiac and respiratory function). The aim is to provide an open-source multi-resolution modelling environment that will permit, at a practical level, a plug-and-play construction of integrated systems models using lumped-parameter components at the organ/tissue level while also allowing focus on cellular- or molecular-level detailed sub-models embedded in the larger core model. Thus, an in silico exploration of gene-to-organ-to-organism scenarios will be possible, while keeping computation time manageable. As a first prototype implementation in this environment, we describe a core model of human physiology targeting the short- and long-term regulation of blood pressure, body fluids and homeostasis of the major solutes. In tandem with the development of the core models, the project involves database implementation and ontology development.

  15. Solid-liquid phase equilibria of the Gaussian core model fluid.

    PubMed

    Mausbach, Peter; Ahmed, Alauddin; Sadus, Richard J

    2009-11-14

    The solid-liquid phase equilibria of the Gaussian core model are determined using the GWTS [J. Ge, G.-W. Wu, B. D. Todd, and R. J. Sadus, J. Chem. Phys. 119, 11017 (2003)] algorithm, which combines equilibrium and nonequilibrium molecular dynamics simulations. This is the first reported use of the GWTS algorithm for a fluid system displaying a reentrant melting scenario. Using the GWTS algorithm, the phase envelope of the Gaussian core model can be calculated more precisely than previously possible. The results for the low-density and the high-density (reentrant melting) sides of the solid state are in good agreement with those obtained by Monte Carlo simulations in conjunction with calculations of the solid free energies. The common point on the Gaussian core envelope, where equal-density solid and liquid phases are in coexistence, could be determined with high precision.

  16. Microthermometry of fluid inclusions from the VC-1 core hole in Valles Caldera, New Mexico

    NASA Astrophysics Data System (ADS)

    Sasada, Masakatsu

    1988-06-01

    Fluid inclusions in vein quartz and calcite from core samples of the VC-1 hole were studied with microscope heating/freezing and crushing stages. All samples originate from hydrothermally altered Paleozoic rocks predating formation of the Jemez Mountains volcanic field and Valles caldera. Most homogenization temperatures (Th) of the liquid-rich inclusions are above the present well temperature, but some Th of primary inclusions from 515 m and those of secondary inclusions from 723 m fit the present well temperature curve measured 10 months after completion of the well. The maximum temperature recorded by the primary inclusions is 275°C from hydrothermal quartz in the Sandia Formation at 811-m depth. The total range of Th for samples from several depths (90°C) indicates cooling from the maximum temperature. The salinity of fluid inclusions in hydrothermal quartz and calcite is generally low, <1 wt % NaCl eq. High-salinity fluid, up to 5 wt % NaCl eq, has been found in several calcite veins from the lower part of the Madera Limestone. The salinity decreases with decrease of Th of the secondary inclusions, and that with lowest Th at the lower part of the Madera Limestone is similar to those from the other depths. These data show that early hot water circulation system involved several types of fluid, whereas the later one was a homogeneous fluid. The salinity of fluid inclusions in detrital quartz (presumably inherited inclusions) is higher than that in hydrothermal minerals. Some of these inclusions show extraordinary low temperatures of final melting point of ice (about -40°C), suggesting that a CaCl2 component is present. CO2 contents in fluid inclusions were estimated by the bubble behavior on crushing. Crushing results indicate that CO2 content of the early fluid is ≧0.35 wt %, and that of the later fluid is ˜0.2-0.3 wt %. Geothermal fluid trapped in the fluid inclusions representing the present temperature regime is comparable in composition to those from

  17. Syntectonic fluid flux during rift faulting: Record from the MIS core, Victoria Land Basin, Antarctica

    NASA Astrophysics Data System (ADS)

    Millan, C.; Wilson, T. J.; Paulsen, T. S.

    2009-12-01

    The McMurdo Ice Shelf project successfully recovered 1285 m of Neogene sedimentary core from the Victoria Land Basin, a large rift basin within the West Antarctic Rift System (WARS) of Antarctica. The core contains 1475 natural fractures that were logged as faults, veins and clastic dikes, associated with the southern extension of the Neogene-active? Terror Rift fault zone. Veins constitute about 625 of this population. Most veins are filled with calcite, although zeolites and minor chlorite are common towards the bottom of the core. In the lower ~300 m of the core, veins contain opening-mode fiber fills and are wavy to tightly folded due to vertical shortening. Folded, opening-mode folded veins are filled by calcite fibers that grew normal to vein walls, indicating the host sediment was cohesive enough to fracture but was not fully lithified and accommodated vein buckling during compaction. Fold hinges are fractured and wedging of vein segments is marked by overlapping tips separated by zones with strong chlorite and clay fabrics, suggesting shearing during further vertical contraction of the host rock. Calcite veins are commonly strongly twinned. Cathodoluminescence microscopy shows minor changes in color and intensity and minimal concentric or sectoral zoning, suggesting relatively rapid crystallization of fluids of similar chemistry. However, stable isotope analyses reveal large variations in values, with carbon values ranging from -21.91 to -7.15 (VPBD) and oxygen values ranging from -5.35 to -11.97 (VPBD). Further detailed investigation of the fracture fills using cathodoluminescence and electron microscopy combined with isotopic analysis of carbon and oxygen will document the generations of the filling material in more detail and will constrain the sources and evolution of the fluids. There has clearly been significant structural control on fluid pathways during lithification, compaction and diagenesis of strata deforming within the Terror Rift zone.

  18. New free energy density functional and application to core-softened fluid.

    PubMed

    Zhou, Shiqi

    2010-05-21

    A new free energy density functional is advanced for general nonhard sphere potentials characterized by a repulsive core with a singular point at zero separation. The present functional is characterized by several features. (i) It does not involve with dividing the potentials into hard-sphere-like contribution and tail contribution in sharp contrast with usual effective hard sphere model+mean field approximation for tail contribution. (ii) It has no recourse to the use of weighted density and is computationally modest; it also does not resort to an equation of state and/or an excess Helmholtz free energy of bulk fluid over a range of density as input. Consequently, all of input information can be obtained by numerical solution of a bulk Ornstein-Zernike integral equation theory (OZ IET). Correspondingly, despite the use of bulk second-order direct correlation function (DCF) as input, the functional is applicable to the subcritical region. (iii) There is no any adjustable parameter associated with the present functional, and an effective hard sphere diameter entering the functional can be determined self-consistently and analytically once the input information, i.e., the second-order DCF and pressure of the coexistence bulk fluid, are obtained by the OZ IET. The present functional is applied to a core-softened fluid subject to varying external fields, and the density distributions predicted by the present functional are more self-consistent with available simulation results than a previous third-order+second-order perturbation density functional theory.

  19. Simultaneous solution for core magnetic field and fluid flow beneath an electrically conducting mantle

    NASA Technical Reports Server (NTRS)

    Voorhies, Goerte V.; Nishihama, Masahiro

    1994-01-01

    The effects of laterally homogeneous mantle electrical conductivity have been included in steady, frozen-flux core surface flow estimation along with refinements in method and weighting. The refined method allows simultaneous solution for both the initial radial geomagnetic field component at the core-mantle boundary and the subadjacent fluid motion; it also features Gauss' method for solving the nonlinear inverse problem associated with steady motional induction. The trade-off between spatial complexity of the derived flows and misfit to the weighted Definitive Geomagnetic Reference Field models is studied for various mantle conductivity profiles. For simple flow and a fixed initial geomagnetic condition a fairly high deep-mantle conductivity performs better than either insulating or weakly conducting profiles; however, a thin, very high conductivity layer at the base of the mantle performs almost as well. Simultaneous solution for both initial geomagnetic field and fluid flow reduces the misfit per degree of freedom even more than does changing the mantle conductivity profile. Moreover, when both core field and flow are estimated, the performance of the solutions and the derived flows become insensitive to the conductivity profile.

  20. Investigation of geomagnetic field forecasting and fluid dynamics of the core

    NASA Technical Reports Server (NTRS)

    Benton, E. R. (Principal Investigator)

    1982-01-01

    It was established that the total absolute magnetic flux crossing the core- mantle boundary has been a constant of the core motion for the last 50 years. This provides a scalar constraint that could be added to the geometric modelling procedure. The GSFC 8 8/80 model is being evaluated. The absolute magnetic flux linking the CMB to that model was plotted as a function of time during the span covered by the data, and increasing truncation level. The inclusion of the standard error of each Gauss coefficient derived from the statistics of fit in the GSFC 9/80 model is useful. The magnitude and sense (upwelling or downe welling) of vertical fluid motion adjacent to the core-mantle boundary was calculated using the model. Standard errors were found to be sufficiently small at all but one or two of the 40 or more critical points of B sub r. They do not nearly overlap the value gamma u/gamma r = 0. It is concluded that the core is upwelling and downwelling at an observationally detectable level.

  1. Core-annular miscible two-fluid flow in a slippery pipe: A stability analysis

    NASA Astrophysics Data System (ADS)

    Chattopadhyay, Geetanjali; Usha, Ranganathan; Sahu, Kirti Chandra

    2017-09-01

    This study is motivated by the preliminary direct numerical simulations in double-diffusive (DD) core-annular flows with slip at the wall which displayed elliptical shaped instability patterns as in a rigid pipe case; however, slip at the pipe wall delays the onset of instability for a range of parameters and increases the phase speed. This increased our curiosity to have a thorough understanding of the linear stability characteristics of the miscible DD two-fluid flow in a pipe with slip at the pipe wall. The present study, therefore, addresses the linear stability of viscosity-stratified core-annular Poiseuille flow of miscible fluids with matched density in a slippery pipe in the presence of two scalars diffusing at different rates. The physical mechanisms responsible for the occurrence of instabilities in the DD system are explained through an energy budget analysis. The differences and similarities between core-annular flow in a slippery pipe and in a plane channel with velocity slip at the walls are explored. The stability characteristics are significantly affected by the presence of slip. The diffusivity effect is non-monotonic in a DD system. A striking feature of instability is that only a band of wavenumbers is destabilized in the presence of moderate to large inertial effects. Both the longwave and shortwave are stabilized at small Reynolds numbers. Slip exhibits a dual role of stabilizing or destabilizing the flow. The preliminary direct numerical simulations confirm the predictions of the linear stability analysis. The present study reveals that it may be possible to control the instabilities in core-annular pressure driven pipe flows by imposing a velocity slip at the walls.

  2. Fluid flow at active oceanic core complexes, 13°N Mid-Atlantic Ridge

    NASA Astrophysics Data System (ADS)

    Murton, B.; Unsworth, S.; Harris, M.; MacLeod, C.; Searle, R.; Casey, J.; Achenbach, K.; Mallows, C.

    2007-12-01

    Oceanic core complexes (OCCs) are the result of long-lived, large displacement, low-angle detachment faults that expose lower crust and mantle rocks at slow-spreading mid-ocean ridges (MOR's). While OCCs share many structural and lithological features indicating some common tectonic processes of formation, until now there has been little constraint on whether fluid flow is related to their activity. Here, we describe recently acquired water column data and rock samples from several active OCCs (from near 13°N on the Mid-Atlantic Ridge) that reveal a history of high and low-temperature fluid flow. At the toe of the active OCC's, where the footwall emerges from beneath an uplifted wedge of fissured volcanics that forms the trailing edge of the hanging wall, massive sulphide chimneys and large volumes of mineralised talc mud indicate the passage of high-temperature hydrothermal fluids. The sulphides are a mixture of iron and copper sulphide in association with chalcedony and talc. The host rock is usually serpentinised peridotite mantle material although some greenschist diabase is also present in the form of dykes. Above the highest point of one of the active OCC's, CTD data revealed a plume of low salinity water. The plume was ~200m wide, had normal background temperature and was devoid of any particulates. We speculate that the origin of the high-temperature mineralization is hydrothermal circulation in the hanging wall, driven by intrusive volcanism injected from the subjacent neovolcanic accretion zones. The origin of the low-salinity plume is more elusive and could be a result of dehydration reactions of serpentinite to either fosterite or, with silicification, to talc. The latter mechanism would accord with the extensive outcrops of talc mud found near the OCC toe, but implies excessive volumes of rock in the reaction zone. Either way, the presence in unusual settings of fluid flow at OCC's indicates that fluid-rock reaction plays an important role at active

  3. Data use investigation for the magnetic field satellite (MAGSAT) mission: Geomagnetic field forecasting and fluid dynamics of the core

    NASA Technical Reports Server (NTRS)

    Benton, E. R. (Principal Investigator)

    1982-01-01

    MAGSAT data were used to construct a variety of spherical harmonic models of the main geomagnetic field emanating from Earth's liquid core at poch 1980. These models were used to: (1) accurately determine the radius of Earth's core by a magnetic method, (2) calculate estimates, of the long-term ange of variation of geomagnetic Gauss coefficients; (3) establish a preferred truncation level for current spherical harmonic models of the main geomagnetic field from the core; (4) evaluate a method for taking account of electrical conduction in the mantle when the magnetic field is downward continued to the core-mantle boundary; and (5) establish that upwelling and downwelling of fluid motion at the top of the core is probably detectable, observationally. A fluid dynamics forecast model was not produced because of insufficient data.

  4. Simultaneous solution for core magnetic field and fluid flow beneath an electrically conducting mantle

    NASA Technical Reports Server (NTRS)

    Voorhies, Coerte V.; Nishihama, Masahiro

    1993-01-01

    The effects of laterally homogeneous mantle electrical conductivity were included in steady, frozen-flux core surface flow estimation along with refinements in method and weighting. The refined method allows simultaneous solution for both the initial radial geomagnetic field component at the core-mantle boundary (CMB) and the sub-adjacent fluid motion; it also features Gauss' method for solving the non-linear inverse problem associated with steady motional induction. The tradeoff between spatial complexity of the derived flows and misfit to the weighted Definitive Geomagnetic Reference Field models (DGRF's) is studied for various mantle conductivity profiles. For simple flow and a fixed initial geomagnetic condition, a fairly high deep-mantle conductivity performs better than either insulating or weakly conducting profiles; however, a thin, very high conductivity layer at the base of the mantle performs almost as well. Simultaneous solution for both initial geomagnetic field and flow reduces the misfit per degree of freedom even more than does changing the mantle conductivity profile. Moreover, when both core field and flow are estimated, the performance of the solutions and the derived flows become insensitive to the conductivity profile.

  5. Magnetic resonance imaging study of complex fluid flow in porous media: flow patterns and quantitative saturation profiling of amphiphilic fracturing fluid displacement in sandstone cores.

    PubMed

    Sheppard, S; Mantle, M D; Sederman, A J; Johns, M L; Gladden, L F

    2003-01-01

    Magnetic resonance imaging is used to follow the removal process of a visco-elastic surfactant (VES) fracturing fluid in Bentheimer sandstone cores at typical reservoir temperatures (T=333 K). Two displacing fluids were investigated, a Gadolinium doped water phase (1M NaCl solution), and a Gadolinium doped hydrocarbon phase (Mineral Spirits). In addition to flow characteristics obtained by conventional core-flooding, i.e., the macroscopically averaged volumetric flow rates and differential pressures, we have also measured the saturation profiles and characteristic displacement patterns during all stages of the removal process. To acquire these data we have used quantitative one-dimensional chemically specific profiling along with fast two-dimensional imaging experiments while flooding Bentheimer sandstone cores in situ in the spectrometer. Our results show that both displacement processes (complex fluid displaced by water or hydrocarbon phase) are dominated by the large viscosity contrasts present. However, distinct differences were found between the displacement characteristics of water and hydrocarbon, which confirmed the sensitivity of the complex fracturing fluid to the displacing fluid.

  6. Structure and thermodynamics of hard-core Yukawa fluids: Thermodynamic perturbation approaches

    NASA Astrophysics Data System (ADS)

    Kim, Eun-Young; Kim, Soon-Chul; Seong, Baek-Seok

    2011-07-01

    The thermodynamic perturbation theories, which are based on the power series of a coupling constant (λ-expansion), have been proposed for studying the structural and thermodynamic properties of a hard-core Yukawa (HCY) fluid: one (A1-approximation) is the perturbation theory based on the hard-sphere repulsion as a reference system. The other (A2-approximation) is the perturbation theory based on the reference system which incorporates both the repulsive and short-range attractive interactions. The first-order mean-spherical approximation (FMSA) provided by Tang and Lu [J. Chem. Phys. 99, 9828 (1993)], 10.1063/1.465465 has been employed for investigating the thermodynamic properties of a HCY fluid using the alternative method via the direct correlation function. The calculated results show that (i) the A1 and A2 approximations are in excellent agreements with previous computer simulation results in the literature and compare with the semi-empirical works of Shukla including the higher-order free energy terms, (ii) the A1 and A2 approximations are better than the FMSA and the mean-spherical approximation, (iii) the A2-approximation compares with the A1-approximation, even though the perturbation effect of an A2-approximation is much smaller than that of an A1-approximation, and that (iv) the FMSA study is particularly of advantage in providing the structure and thermodynamics in a simple and analytic manner.

  7. Solidification in soft-core fluids: Disordered solids from fast solidification fronts.

    PubMed

    Archer, A J; Walters, M C; Thiele, U; Knobloch, E

    2014-10-01

    Using dynamical density functional theory we calculate the speed of solidification fronts advancing into a quenched two-dimensional model fluid of soft-core particles. We find that solidification fronts can advance via two different mechanisms, depending on the depth of the quench. For shallow quenches, the front propagation is via a nonlinear mechanism. For deep quenches, front propagation is governed by a linear mechanism and in this regime we are able to determine the front speed via a marginal stability analysis. We find that the density modulations generated behind the advancing front have a characteristic scale that differs from the wavelength of the density modulation in thermodynamic equilibrium, i.e., the spacing between the crystal planes in an equilibrium crystal. This leads to the subsequent development of disorder in the solids that are formed. In a one-component fluid, the particles are able to rearrange to form a well-ordered crystal, with few defects. However, solidification fronts in a binary mixture exhibiting crystalline phases with square and hexagonal ordering generate solids that are unable to rearrange after the passage of the solidification front and a significant amount of disorder remains in the system.

  8. Structure and thermodynamics of hard-core Yukawa fluids: thermodynamic perturbation approaches.

    PubMed

    Kim, Eun-Young; Kim, Soon-Chul; Seong, Baek-Seok

    2011-07-21

    The thermodynamic perturbation theories, which are based on the power series of a coupling constant (λ-expansion), have been proposed for studying the structural and thermodynamic properties of a hard-core Yukawa (HCY) fluid: one (A1-approximation) is the perturbation theory based on the hard-sphere repulsion as a reference system. The other (A2-approximation) is the perturbation theory based on the reference system which incorporates both the repulsive and short-range attractive interactions. The first-order mean-spherical approximation (FMSA) provided by Tang and Lu [J. Chem. Phys. 99, 9828 (1993)] has been employed for investigating the thermodynamic properties of a HCY fluid using the alternative method via the direct correlation function. The calculated results show that (i) the A1 and A2 approximations are in excellent agreements with previous computer simulation results in the literature and compare with the semi-empirical works of Shukla including the higher-order free energy terms, (ii) the A1 and A2 approximations are better than the FMSA and the mean-spherical approximation, (iii) the A2-approximation compares with the A1-approximation, even though the perturbation effect of an A2-approximation is much smaller than that of an A1-approximation, and that (iv) the FMSA study is particularly of advantage in providing the structure and thermodynamics in a simple and analytic manner.

  9. Update on the core and developing cerebrospinal fluid biomarkers for Alzheimer disease.

    PubMed

    Babić, Mirjana; Svob Štrac, Dubravka; Mück-Šeler, Dorotea; Pivac, Nela; Stanić, Gabrijela; Hof, Patrick R; Simić, Goran

    2014-08-28

    Alzheimer disease (AD) is a complex neurodegenerative disorder, whose prevalence will dramatically rise by 2050. Despite numerous clinical trials investigating this disease, there is still no effective treatment. Many trials showed negative or inconclusive results, possibly because they recruited only patients with severe disease, who had not undergone disease-modifying therapies in preclinical stages of AD before severe degeneration occurred. Detection of AD in asymptomatic at risk individuals (and a few presymptomatic individuals who carry an autosomal dominant monogenic AD mutation) remains impractical in many of clinical situations and is possible only with reliable biomarkers. In addition to early diagnosis of AD, biomarkers should serve for monitoring disease progression and response to therapy. To date, the most promising biomarkers are cerebrospinal fluid (CSF) and neuroimaging biomarkers. Core CSF biomarkers (amyloid β1-42, total tau, and phosphorylated tau) showed a high diagnostic accuracy but were still unreliable for preclinical detection of AD. Hence, there is an urgent need for detection and validation of novel CSF biomarkers that would enable early diagnosis of AD in asymptomatic individuals. This article reviews recent research advances on biomarkers for AD, focusing mainly on the CSF biomarkers. In addition to core CSF biomarkers, the potential usefulness of novel CSF biomarkers is discussed.

  10. Update on the core and developing cerebrospinal fluid biomarkers for Alzheimer disease

    PubMed Central

    Babić, Mirjana; Švob Štrac, Dubravka; Mück-Šeler, Dorotea; Pivac, Nela; Stanić, Gabrijela; Hof, Patrick R.; Šimić, Goran

    2014-01-01

    Alzheimer disease (AD) is a complex neurodegenerative disorder, whose prevalence will dramatically rise by 2050. Despite numerous clinical trials investigating this disease, there is still no effective treatment. Many trials showed negative or inconclusive results, possibly because they recruited only patients with severe disease, who had not undergone disease-modifying therapies in preclinical stages of AD before severe degeneration occurred. Detection of AD in asymptomatic at risk individuals (and a few presymptomatic individuals who carry an autosomal dominant monogenic AD mutation) remains impractical in many of clinical situations and is possible only with reliable biomarkers. In addition to early diagnosis of AD, biomarkers should serve for monitoring disease progression and response to therapy. To date, the most promising biomarkers are cerebrospinal fluid (CSF) and neuroimaging biomarkers. Core CSF biomarkers (amyloid β1-42, total tau, and phosphorylated tau) showed a high diagnostic accuracy but were still unreliable for preclinical detection of AD. Hence, there is an urgent need for detection and validation of novel CSF biomarkers that would enable early diagnosis of AD in asymptomatic individuals. This article reviews recent research advances on biomarkers for AD, focusing mainly on the CSF biomarkers. In addition to core CSF biomarkers, the potential usefulness of novel CSF biomarkers is discussed. PMID:25165049

  11. All-fiber optical modulator based on no-core fiber and magnetic fluid as cladding

    NASA Astrophysics Data System (ADS)

    Chen, Yao-Fei; Han, Qun; Liu, Tie-Gen

    2015-01-01

    An all-fiber optical modulator, which is composed of a piece of no-core fiber spliced between two sections of single-mode fibers and uses magnetic fluid (MF) as the cladding of the no-core fiber section, is proposed and investigated experimentally. Due to the tunable refractive index and absorption coefficient of MF, the output intensity can be modulated by controlling an applied magnetic field. The dependences of the modulator’s temporal response on the working wavelength, the magnetic field strength (H), and the MF’s concentration are investigated experimentally. The results are explained qualitatively by the dynamic response process of MF under the action of a magnetic field. The findings are helpful for optimizing this kind of modulator. Project supported by the Natural Science Foundation of Tianjin City, China (Grant No. 13JCYBJC16100), the National Natural Science Foundation of China (Grant No. 61107035), the National Key Scientific Instrument and Equipment Development Project of China (Grant No. 2013YQ03091502), and the National Basic Research Program of China (Grant Nos. 2010CB327802 and 2010CB327806).

  12. Structural properties of fluids interacting via piece-wise constant potentials with a hard core.

    PubMed

    Santos, Andrés; Yuste, Santos B; de Haro, Mariano López; Bárcenas, Mariana; Orea, Pedro

    2013-08-21

    The structural properties of fluids whose molecules interact via potentials with a hard core plus two piece-wise constant sections of different widths and heights are presented. These follow from the more general development previously introduced for potentials with a hard core plus n piece-wise constant sections [A. Santos, S. B. Yuste, and M. Lopez de Haro, Condens. Matter Phys. 15, 23602 (2012)] in which use was made of a semi-analytic rational-function approximation method. The results of illustrative cases comprising eight different combinations of wells and shoulders are compared both with simulation data and with those that follow from the numerical solution of the Percus-Yevick and hypernetted-chain integral equations. It is found that the rational-function approximation generally predicts a more accurate radial distribution function than the Percus-Yevick theory and is comparable or even superior to the hypernetted-chain theory. This superiority over both integral equation theories is lost, however, at high densities, especially as the widths of the wells and/or the barriers increase.

  13. Effect of irrigation fluid temperature on core temperature and hemodynamic changes in transurethral resection of prostate under spinal anesthesia

    PubMed Central

    Singh, Rajeev; Asthana, Veena; Sharma, Jagdish P.; Lal, Shobha

    2014-01-01

    Background: Hypothermia is a frequent observation in elderly males undergoing transurethral resection of prostate (TURP) under spinal anesthesia. The use of irrigating fluids at room temperature results in a decrease body temperature. Warmed irrigating solutions have shown to reduce heat loss and the resultant shivering. Such investigation was not much tried in low resource settings. Aim: To compare the resultant change in core temperature and hemodynamic changes among patients undergoing TURP surgery under spinal anesthesia using warm and room temperature irrigation fluids. Settings and Design: Randomized prospective study at a tertiary care center. Methods: This study was conducted on 40 male patients aged 50-85 years undergoing TURP under spinal anesthesia. Of which, 20 patients received irrigation fluid at room temperature 21°C and 20 patients received irrigation fluid at 37°C after random allocation. Core temperatures and hemodynamic parameters were assessed in all patients at preoperative, intra-operative, and postoperative periods. Intra-operative shivering was also noted in both groups. Statistical Analysis: Unpaired and Paired Student's t-test. Results: For patients who underwent irrigation with fluid at room temperature Core temperature drop from 36.97°C in preoperative to 34.54°C in postoperative period with an effective difference of 2.38°C. Among patients who received warmed irrigation fluid at 37°C had core temperature drop from 36.97°C to 36.17°C and the effect of fall was 0.8°C. This difference was statistically significant (P < 0.001). Shivering of Grades 1 and 2 was observed in nine patients, of Group 1 while only three patients had Grades 1 and 2 shivering in Group 2. The hemodynamic parameters were similar in the two groups and did not reach significant difference. Conclusion: Use of warm irrigation fluid during TURP reduces the risk of perioperative hypothermia and shivering. PMID:25886228

  14. Embedding Hands-On Mini Laboratory Experiences in a Core Undergraduate Fluid Mechanics Course: A Pilot Study

    ERIC Educational Resources Information Center

    Han, Duanduan; Ugaz, Victor

    2017-01-01

    Three self-contained mini-labs were integrated into a core undergraduate fluid mechanics course, with the goal of delivering hands-on content in a manner scalable to large class sizes. These mini-labs supported learning objectives involving friction loss in pipes, flow measurement, and centrifugal pump analysis. The hands-on experiments were…

  15. Fluid Dynamic Eqs. For Adiabatic Convection In Earth's Ultracompressed Core; Turbulence Engendered Large-Scale Motions

    NASA Astrophysics Data System (ADS)

    McDonald, K. L.

    2002-10-01

    Our analysis is divided into 2 parts, i.e., establishing formalism that predicts (a), convective flows in earth's molten, precessing, core, that arise from 15-20 heat sources distributed over solid inner core boundary, mathord r = R_ic = 1240 km how they induce B - field reversals and transport heat of 4 radioactive disintegration chains (some now inactive) contained within mathord r <= R_ic,and (b), turbulence engendered large-scale mer. motion and turbulent differential rot., which are coupled by Coriolis forces. We employ the vorticity transport equation, obtained by forming curl of Navier-Stokes eq. (thereby eliminating pressure mathord p(x_i,t) as a dependent variable) together with the amplification eq., both to be solved simultaneously with other necessary fluid dynamic eqs., to effect a general solution for molten iron core. We employ Navier-Stokes eq. and write ρ d v /dt=ρ g a + 2 ρ v x Υ -nabla p + (4πμ)-1 (nabla x B ) x B +ηnabla ^2 v + fracη3 nabla (nabla ot v ) - 2/3 (nabla ot v ) nabla η + nabla η ot nabla v + nabla v ot nabla η, where g a doteq - nabla Ω + nabla 1/2 (Υ x r ) ^2 + r x d Υ /dt + (g _s+p - ) is appar. acceleration of gravity. Since coeff. Of viscosity η depends only on p,T it is closely only a function of r; mathord η = η(r), altho η = const. will suffice for convection calculations. In eq. of secular fluid motion, obtained by forming ensemble mean of vector curl of N-S eq., viscous forces are driving forces and last 3 terms should be retained. Eq. of continuity remains as before but state eq. mathord p = ρ k^*T and adiabaticity eq. for perfect gas fail to apply to liquids and we must adopt eqs. for ultracompressed fluids (K L McDonald, Computations In Theoretical Physics..., Univ. Ut., Expt. Sta. Bul. 138, Vol. 56, No. 27(1966)), namely, state eq., κ (p-p_o) = loge ρ/ρo + ɛ(T-T_o) and adiabatic eq., Te ^α/ρ= const., α = M_Wɛ/κ c_V; cV is molar thermal capacity, etc. We subst. this into state equation to

  16. Isostructural solid-solid phase transition in monolayers of soft core-shell particles at fluid interfaces: structure and mechanics.

    PubMed

    Rey, Marcel; Fernández-Rodríguez, Miguel Ángel; Steinacher, Mathias; Scheidegger, Laura; Geisel, Karen; Richtering, Walter; Squires, Todd M; Isa, Lucio

    2016-04-21

    We have studied the complete two-dimensional phase diagram of a core-shell microgel-laden fluid interface by synchronizing its compression with the deposition of the interfacial monolayer. Applying a new protocol, different positions on the substrate correspond to different values of the monolayer surface pressure and specific area. Analyzing the microstructure of the deposited monolayers, we discovered an isostructural solid-solid phase transition between two crystalline phases with the same hexagonal symmetry, but with two different lattice constants. The two phases corresponded to shell-shell and core-core inter-particle contacts, respectively; with increasing surface pressure the former mechanically failed enabling the particle cores to come into contact. In the phase-transition region, clusters of particles in core-core contacts nucleate, melting the surrounding shell-shell crystal, until the whole monolayer moves into the second phase. We furthermore measured the interfacial rheology of the monolayers as a function of the surface pressure using an interfacial microdisk rheometer. The interfaces always showed a strong elastic response, with a dip in the shear elastic modulus in correspondence with the melting of the shell-shell phase, followed by a steep increase upon the formation of a percolating network of the core-core contacts. These results demonstrate that the core-shell nature of the particles leads to a rich mechanical and structural behavior that can be externally tuned by compressing the interface, indicating new routes for applications, e.g. in surface patterning or emulsion stabilization.

  17. Fluid evolution in an Oceanic Core Complex: A fluid inclusion study from IODP hole U1309 D—Atlantis Massif, 30°N, Mid-Atlantic Ridge

    NASA Astrophysics Data System (ADS)

    Castelain, Teddy; McCaig, Andrew M.; Cliff, Robert A.

    2014-04-01

    In the detachment mode of slow seafloor spreading, convex-upward detachment faults take up a high proportion of the plate separation velocity exposing gabbro and serpentinized peridotite on the seafloor. Large, long-lived hydrothermal systems such as TAG are situated off axis and may be controlled by fluid flow up a detachment fault, with the source of magmatic heat being as deep as 7 kmbsf. The consequences of such deep circulation for the evolution of fluid temperature and salinity have not previously been investigated. Microthermometry on fluid inclusions trapped in diabase, gabbro, and trondjhemite, recovered at the Atlantis Massif Oceanic Core Complex (30°N, Mid-Atlantic Ridge), reveals evidence for magmatic exsolution, phase separation, and mixing between hydrothermal fluids and previously phase-separated fluids. Four types of fluid inclusions were identified, ranging in salinity from 1.4 to 35 wt % NaCl, although the most common inclusions have salinities close to seawater (3.4 wt % NaCl). Homogenization temperatures range from 160 to >400°C, with the highest temperatures in hypersaline inclusions trapped in trondjhemite and the lowest temperatures in low-salinity inclusions trapped in quartz veins. The fluid history of the Atlantis Massif is interpreted in the context of published thermochronometric data from the Massif, and a comparison with the inferred circulation pattern beneath the TAG hydrothermal field, to better constrain the pressure temperature conditions of trapping and when in the history of exhumation of the rocks sampled by IODP Hole U1309D fluids have been trapped.

  18. Comparative evaluation of the indigenous microbial diversity vs. drilling fluid contaminants in the NEEM Greenland ice core.

    PubMed

    Miteva, Vanya; Burlingame, Caroline; Sowers, Todd; Brenchley, Jean

    2014-08-01

    Demonstrating that the detected microbial diversity in nonaseptically drilled deep ice cores is truly indigenous is challenging because of potential contamination with exogenous microbial cells. The NEEM Greenland ice core project provided a first-time opportunity to determine the origin and extent of contamination throughout drilling. We performed multiple parallel cultivation and culture-independent analyses of five decontaminated ice core samples from different depths (100-2051 m), the drilling fluid and its components Estisol and Coasol, and the drilling chips collected during drilling. We created a collection of diverse bacterial and fungal isolates (84 from the drilling fluid and its components, 45 from decontaminated ice, and 66 from drilling chips). Their categorization as contaminants or intrinsic glacial ice microorganisms was based on several criteria, including phylogenetic analyses, genomic fingerprinting, phenotypic characteristics, and presence in drilling fluid, chips, and/or ice. Firmicutes and fungi comprised the dominant group of contaminants among isolates and cloned rRNA genes. Conversely, most Proteobacteria and Actinobacteria originating from the ice were identified as intrinsic. This study provides a database of potential contaminants useful for future studies of NEEM cores and can contribute toward developing standardized protocols for contamination detection and ensuring the authenticity of the microbial diversity in deep glacial ice.

  19. Modeling of Viscoelastic Properties of Porous Rocks Saturated with Viscous Fluid at Seismic Frequencies at the Core Scale

    NASA Astrophysics Data System (ADS)

    Schmitt, D. R.; Wang, Z.; Wang, F.; Wang, R.

    2015-12-01

    Currently the moduli and velocities of rocks at seismic frequencies are usually measured by the strain-stress method in lab. However, such measurements require well-designed equipment and skilled technicians, which greatly hinders the experimental investigation on the elastic and visco-elastic properties of rocks at seismic frequencies. We attempt to model the dynamic moduli of porous rocks saturated with viscous fluid at seismic frequencies on core scale using the strain-stress method, aiming to provide a complement to real core measurements in lab. First, we build 2D geometrical models containing the pore structure information of porous rocks based on the digital images (such as thin section, SEM, CT, etc.) of real rocks. Then we assume the rock frames are linearly elastic, and use the standard Maxwell spring-dash pot model to describe the visco-elastic properties of pore fluids. Boundary conditions are set according to the strain-stress method; and the displacement field is calculated using the finite element method (FEM). We numerically test the effects of fluid viscosity, frequency, and pore structure on the visco-elastic properties based on the calculation results. In our modeling, the viscosity of the pore fluid ranges from 103mPas to 109mPas; and the frequency varies from 5Hz to 500Hz. The preliminary results indicate that the saturated rock behaves stiffer and shows larger phase lag between stress and strain when the viscosity of the pore fluid and (or) the frequency increase.

  20. Effect of the Earth's magnetic field spatial distribution on the electromagnetic coupling at the fluid core boundaries for nutations

    NASA Astrophysics Data System (ADS)

    Koot, L.; Dumberry, M.

    2011-12-01

    Nutations are periodic variations in the orientation of the Earth's rotation axis in space. This motion is generated by the gravitational torque applied on the Earth's equatorial bulge by the Moon, the Sun, and the other planets. Because the mantle, the fluid outer core and the solid inner core react differently to the applied torque, the nutation motion is characterized by differential rotations between these three regions. Since the boundaries of the fluid outer core are permeated by a background magnetic field (the geodynamo field), the differential rotation at the fluid core boundaries induces a secondary magnetic field by shear and advection of the background field. The associated electric currents produce Lorentz forces and torques between the outer core, inner core, and mantle, that tend to oppose the differential rotation. A previous study has shown that the magnitude of the electromagnetic (EM) torque is mainly determined by the electrical conductivities on both sides of the outer core boundaries and by the mean RMS strength of the background magnetic field, with the spatial distribution of this magnetic field being unimportant to first order. The goal of the present work is to reassess the role of the magnetic field spatial distribution on the strength of the EM torque using a new model of the EM coupling for nutations that we have recently developed. Our model differs from previous ones in that we use a global approach to describe the induced magnetic field. Moreover, we also include in the torque the contribution from the poloidal component of the induced field, an effect neglected in previous models. In addition, we do not assume a priori that the non-dipolar components of the background magnetic field can be represented by a uniform field with the same power but instead we calculate the torque on the basis of the full geometry of the field. This is particularly important for the poloidal torque as it depends directly on the surface gradient of the

  1. Thermodynamic properties of Fe-S alloys from molecular dynamics modeling: Implications for the lunar fluid core

    NASA Astrophysics Data System (ADS)

    Kuskov, Oleg L.; Belashchenko, David K.

    2016-09-01

    Density and sound velocity of Fe-S liquids for the P-T parameters of the lunar core have not been constrained well. From the analysis of seismic wave travel time, Weber et al. (2011) proposed that the lunar core is composed of iron alloyed with ⩽6 wt% of light elements, such as S. A controversial issue in models of planetary core composition concerns whether Fe-S liquids under high pressure - temperature conditions provide sound velocity and density data, which match the seismic model. Here we report the results of molecular dynamics (MD) simulations of iron-sulfur alloys based on Embedded Atom Model (EAM). The results of calculations include caloric, thermal and elastic properties of Fe-S alloys at concentrations of sulfur 0-18 at.%, temperatures up to 2500 K and pressures up to 14 GPa. The effect of sulfur on the elastic properties of Fe-rich melts is most evident in the notably decreased density with added S content. In the MD simulation, the density and bulk modulus KT of liquid Fe-S decrease with increasing sulfur content, while the bulk modulus KS decreases as a whole but has some fluctuations with increasing sulfur content. The sound velocity increases with increasing pressure, but depends weakly on temperature and the concentration of sulfur. For a fluid Fe-S core of the Moon (∼5 GPa/2000 K) with 6-16 at.% S (3.5-10 wt%), the sound velocity and density may be estimated at the level of 4000 m s-1 and 6.25-7.0 g cm-3. Comparison of thermodynamic calculations with the results of interpretation of seismic observations shows good agreement of P-wave velocities in the liquid outer core, while the core density does not match the seismic models. At such concentrations of sulfur and a density by 20-35% higher than the model seismic density, a radius for the fluid outer core should be less than about 330 km found by Weber et al. because at the specified mass and moment of inertia values of the Moon an increase of the core density leads to a decrease of the core

  2. Numerical theory of rotation of the deformable Earth with the two-layer fluid core. Part 1: Mathematical model

    NASA Astrophysics Data System (ADS)

    Krasinsky, G. A.

    2006-11-01

    Improved differential equations of the rotation of the deformable Earth with the two-layer fluid core are developed. The equations describe both the precession-nutational motion and the axial rotation (i.e. variations of the Universal Time UT). Poincaré’s method of modeling the dynamical effects of the fluid core, and Sasao’s approach for calculating the tidal interaction between the core and mantle in terms of the dynamical Love number are generalized for the case of the two-layer fluid core. Some important perturbations ignored in the currently adopted theory of the Earth’s rotation are considered. In particular, these are the perturbing torques induced by redistribution of the density within the Earth due to the tidal deformations of the Earth and its core (including the effects of the dissipative cross interaction of the lunar tides with the Sun and the solar tides with the Moon). Perturbations of this kind could not be accounted for in the adopted Nutation IAU 2000, in which the tidal variations of the moments of inertia of the mantle and core are the only body tide effects taken into consideration. The equations explicitly depend on the three tidal phase lags δ, δ c, δ i responsible for dissipation of energy in the Earth as a whole, and in its external and inner cores, respectively. Apart from the tidal effects, the differential equations account for the non-tidal interaction between the mantle and external core near their boundary. The equations are presented in a simple close form suitable for numerical integration. Such integration has been carried out with subsequent fitting the constructed numerical theory to the VLBI-based Celestial Pole positions and variations of UT for the time span 1984 2005. Details of the fitting are given in the second part of this work presented as a separate paper (Krasinsky and Vasilyev 2006) hereafter referred to as Paper 2. The resulting Weighted Root Mean Square (WRMS) errors of the residuals d θ, sin θd φ for

  3. Subseafloor Boiling Within the PACMANUS Hydrothermal System Indicated by Anhydrite-Hosted Fluid Inclusions from ODP Leg 193 Cores

    NASA Astrophysics Data System (ADS)

    Vanko, D. A.; Bach, W.; Scott, S. D.; Yeats, C.; Roberts, S.; Beaudoin, Y.

    2001-12-01

    Drilling during Leg 193 was in an area of active hydrothermal venting from dacitic rocks on Pual Ridge in the Manus Basin. All the cored rocks underlying the fresh surficial volcanic rocks are intensively hydrothermally altered. Primary fluid inclusions preserved in anhydrite veins provide unique fluid samples that provide direct evidence on the chemical and physical properties of hydrothermal fluids present beneath the seafloor. Site 1188 is located on Snowcap Knoll, an area of diffuse warm venting at a water depth of ~1645 m. Fluid inclusions have been studied from a coarse anhydrite +/- pyrite vein from ~123 m below the seafloor. The ambient hydrostatic pressure for this sample is calculated to be ~180 bars. The ambient temperature is unknown, but the T measured after 8 days of thermal rebound at a depth of 360 m in this hole was 313° C. Primary fluid inclusions measuring up to 100 μ m across are dominantly two-phase L + V inclusions, yet fluid inclusions with up to three daughter crystals are also observed. The largest daughter crystal is halite, commonly accompanied by a small transparent granular daughter crystal and an even smaller granular opaque crystal. Consequently, optical inspection alone demonstrates the co-occurrence of both hypersaline, multicomponent brines and less saline aqueous fluids. Ice melting temperatures for L+V inclusions vary from -0.1° to -14.5° C, with a strong mode at -2° C, corresponding to a seawater-like salinity. However, the range in Tm(ice) indicates that a significant number contain quite fresh water, and others contain quite saline water. Ice melting temperatures from the multiphase inclusions, measured in the presence of hydrohalite, range from -29.5° to -39.9° C, confirming their hypersaline composition. These data, as well as measured halite dissolution temperatures ranging from 125° to 257° C, indicate salinities of ~30+/-3 wt.% NaCl equivalent. Most two-phase inclusions homogenize to liquid between 191° C and

  4. Fluid inclusions and preliminary studies of hydrothermal alteration in core hole PLTG-1, Platanares geothermal area, Honduras

    USGS Publications Warehouse

    Bargar, K.E.

    1991-01-01

    The Platanares geothermal area in western Honduras consists of more than 100 hot springs that issue from numerous hot-spring groups along the banks or within the streambed of the Quebrada de Agua Caliente (brook of hot water). Evaluation of this geothermal area included drilling a 650-m deep PLTG-1 drill hole which penetrated a surface mantling of stream terrace deposits, about 550 m of Tertiary andesitic lava flows, and Cretaceous to lower Tertiary sedimentary rocks in the lower 90 m of the drill core. Fractures and cavities in the drill core are partly to completely filled by hydrothermal minerals that include quartz, kaolinite, mixed-layer illite-smectite, barite, fluorite, chlorite, calcite, laumontite, biotite, hematite, marcasite, pyrite, arsenopyrite, stibnite, and sphalerite; the most common open-space fillings are calcite and quartz. Biotite from 138.9-m depth, dated at 37.41 Ma by replicate 40Ar/39 Ar analyses using a continuous laser system, is the earliest hydrothermal mineral deposited in the PLTG-1 drill core. This mid-Tertiary age indicates that at least some of the hydrothermal alteration encountered in the PLTG-1 drill core occured in the distant past and is unrelated to the present geothermal system. Furthermore, homogenization temperatures (Th) and melting-point temperatures (Tm) for fluid inclusions in two of the later-formed hydrothermal minerals, calcite and barite, suggest that the temperatures and concentration of dissolved solids of the fluids present at the time these fluid inclusions formed were very different from the present temperatures and fluid chemistry measured in the drill hole. Liquid-rich secondary fluid inclusions in barite and caicite from drill hole PLTG-1 have Th values that range from about 20??C less than the present measured temperature curve at 590.1-m depth to as much as 90??C higher than the temperature curve at 46.75-m depth. Many of the barite Th measurements (ranging between 114?? and 265??C) plot above the

  5. Core-flood experiment for transport of reactive fluids in rocks.

    PubMed

    Ott, H; de Kloe, K; van Bakel, M; Vos, F; van Pelt, A; Legerstee, P; Bauer, A; Eide, K; van der Linden, A; Berg, S; Makurat, A

    2012-08-01

    Investigation of the transport of reactive fluids in porous rocks is an intriguing but challenging task and relevant in several areas of science and engineering such as geology, hydrogeology, and petroleum engineering. We designed and constructed an experimental setup to investigate physical and chemical processes caused by the flow of reactive and volatile fluids such as supercritical CO(2) and/or H(2)S in geological formations. Potential applications are geological sequestration of CO(2) in the frame of carbon capture and storage and acid-gas injection for sulfur disposal and/or enhanced oil recovery. The present paper outlines the design criteria and the realization of reactive transport experiments on the laboratory scale. We focus on the spatial and time evolution of rock and fluid composition as a result of chemical rock fluid interaction and the coupling of chemistry and fluid flow in porous rocks.

  6. Design of Gas-phase Synthesis of Core-Shell Particles by Computational Fluid – Aerosol Dynamics

    PubMed Central

    Buesser, B.; Pratsinis, S.E.

    2013-01-01

    Core-shell particles preserve the bulk properties (e.g. magnetic, optical) of the core while its surface is modified by a shell material. Continuous aerosol coating of core TiO2 nanoparticles with nanothin silicon dioxide shells by jet injection of hexamethyldisiloxane precursor vapor downstream of titania particle formation is elucidated by combining computational fluid and aerosol dynamics. The effect of inlet coating vapor concentration and mixing intensity on product shell thickness distribution is presented. Rapid mixing of the core aerosol with the shell precursor vapor facilitates efficient synthesis of hermetically coated core-shell nanoparticles. The predicted extent of hermetic coating shells is compared to the measured photocatalytic oxidation of isopropanol by such particles as hermetic SiO2 shells prevent the photocatalytic activity of titania. Finally the performance of a simpler, plug-flow coating model is assessed by comparisons to the present detailed CFD model in terms of coating efficiency and silica average shell thickness and texture. PMID:23729817

  7. Core Angular Momentum and the IERS Sub-Centers Activity for Monitoring Global Geophysical Fluids. Part 1; Core Angular Momentum and Earth Rotation

    NASA Technical Reports Server (NTRS)

    Song, Xia-Dong; Chao, Benjamin (Technical Monitor)

    1999-01-01

    The part of the grant was to use recordings of seismic waves travelling through the earth's core (PKP waves) to study the inner core rotation and constraints on possible density anomalies in the fluid core. The shapes and relative arrival times of such waves associated with a common source were used to reduce the uncertainties in source location and excitation and the effect of unknown mantle structure. The major effort of the project is to assemble historical seismograms with long observing base lines. We have found original paper records of SSI earthquakes at COL between 1951 and 1966 in a warehouse of the U.S. Geological Survey office in Golden, Colorado, extending the previous measurements at COL by Song and Richards [1996] further back 15 years. Also in Alaska, the University of Alaska, Fairbanks Geophysical Institute (UAFGI) has been operating the Alaskan Seismic Network with over 100 stations since the late 1960s. Virtually complete archives of seismograms are still available at UAFGI. Unfortunately, most of the archives are in microchip form (develocorders), for which the use of waveforms is impossible. Paper seismograms (helicorders) are available for a limited number of stations, and digital recordings of analog signals started around 1989. Of the paper records obtained, stations at Gilmore Dome (GLM, very close to COL), Yukon (FYU), McKinley (MCK), and Sheep Creek Mountain (SCM) have the most complete continuous recordings.

  8. Core Angular Momentum and the IERS Sub-Centers Activity for Monitoring Global Geophysical Fluids. Part 1; Core Angular Momentum and Earth Rotation

    NASA Technical Reports Server (NTRS)

    Song, Xia-Dong; Chao, Benjamin (Technical Monitor)

    1999-01-01

    The part of the grant was to use recordings of seismic waves travelling through the earth's core (PKP waves) to study the inner core rotation and constraints on possible density anomalies in the fluid core. The shapes and relative arrival times of such waves associated with a common source were used to reduce the uncertainties in source location and excitation and the effect of unknown mantle structure. The major effort of the project is to assemble historical seismograms with long observing base lines. We have found original paper records of SSI earthquakes at COL between 1951 and 1966 in a warehouse of the U.S. Geological Survey office in Golden, Colorado, extending the previous measurements at COL by Song and Richards [1996] further back 15 years. Also in Alaska, the University of Alaska, Fairbanks Geophysical Institute (UAFGI) has been operating the Alaskan Seismic Network with over 100 stations since the late 1960s. Virtually complete archives of seismograms are still available at UAFGI. Unfortunately, most of the archives are in microchip form (develocorders), for which the use of waveforms is impossible. Paper seismograms (helicorders) are available for a limited number of stations, and digital recordings of analog signals started around 1989. Of the paper records obtained, stations at Gilmore Dome (GLM, very close to COL), Yukon (FYU), McKinley (MCK), and Sheep Creek Mountain (SCM) have the most complete continuous recordings.

  9. Investigation of geomagnetic field forecasting and fluid dynamics of the core

    NASA Technical Reports Server (NTRS)

    Benton, E. R. (Principal Investigator)

    1982-01-01

    Progress in the development, testing, and evaluation of kinematic geomagnetic forecast models and their utility in magnetic prediction of the core-mantle boundary of the Earth and in determination of the core radius is reported. The GFSC 9/80 model, which uses MAGSAT data, was determined to be of high quality.

  10. Investigation of geomagnetic field forecasting and fluid dynamics of the core

    NASA Technical Reports Server (NTRS)

    Benton, E. R. (Principal Investigator)

    1981-01-01

    The magnetic determination of the depth of the core-mantle boundary using MAGSAT data is discussed. Refinements to the approach of using the pole-strength of Earth to evaluate the radius of the Earth's core-mantle boundary are reported. The downward extrapolation through the electrically conducting mantle was reviewed. Estimates of an upper bound for the time required for Earth's liquid core to overturn completely are presented. High order analytic approximations to the unsigned magnetic flux crossing the Earth's surface are also presented.

  11. Effects of confinement on anomalies and phase transitions of core-softened fluids

    SciTech Connect

    Krott, Leandro B. Barbosa, Marcia C.; Bordin, José Rafael

    2015-04-07

    We use molecular dynamics simulations to study how the confinement affects the dynamic, thermodynamic, and structural properties of a confined anomalous fluid. The fluid is modeled using an effective pair potential derived from the ST4 atomistic model for water. This system exhibits density, structural, and dynamical anomalies, and the vapor-liquid and liquid-liquid critical points similar to the quantities observed in bulk water. The confinement is modeled both by smooth and structured walls. The temperatures of extreme density and diffusion for the confined fluid show a shift to lower values while the pressures move to higher amounts for both smooth and structured confinements. In the case of smooth walls, the critical points and the limit between fluid and amorphous phases show a non-monotonic change in the temperatures and pressures when the nanopore size is increase. In the case of structured walls, the pressures and temperatures of the critical points varies monotonically with the pore size. Our results are explained on basis of the competition between the different length scales of the fluid and the wall-fluid interaction.

  12. Effects of confinement on anomalies and phase transitions of core-softened fluids.

    PubMed

    Krott, Leandro B; Bordin, José Rafael; Barraz, Ney M; Barbosa, Marcia C

    2015-04-07

    We use molecular dynamics simulations to study how the confinement affects the dynamic, thermodynamic, and structural properties of a confined anomalous fluid. The fluid is modeled using an effective pair potential derived from the ST4 atomistic model for water. This system exhibits density, structural, and dynamical anomalies, and the vapor-liquid and liquid-liquid critical points similar to the quantities observed in bulk water. The confinement is modeled both by smooth and structured walls. The temperatures of extreme density and diffusion for the confined fluid show a shift to lower values while the pressures move to higher amounts for both smooth and structured confinements. In the case of smooth walls, the critical points and the limit between fluid and amorphous phases show a non-monotonic change in the temperatures and pressures when the nanopore size is increase. In the case of structured walls, the pressures and temperatures of the critical points varies monotonically with the pore size. Our results are explained on basis of the competition between the different length scales of the fluid and the wall-fluid interaction.

  13. Simultaneous Determination of Capillary Pressure and Relative Permeability Curves from Core-Flooding Experiments with Various Fluid Pairs

    NASA Astrophysics Data System (ADS)

    Pini, Ronny; Hingerl, Ferdinand; Benson, Sally

    2013-04-01

    Geological systems are complex and so are the processes that determine the distribution of two (or more) immiscible phases within their porous structure; nevertheless, an empirical relationship between the capillary pressure and saturation, the capillary pressure function, provides the foundation for the theory of multiphase flow in porous media. The simultaneous existence of at least two fluids in a porous rock further implies that the ability of each fluid to flow is reduced by the presence of the other and a so-called relative permeability function has been introduced and defined as the ratio between the effective permeability to the given phase and the absolute permeability of the rock. When coupled to the continuum-scale equations of motion, these two characteristic curves allow for a description of multiphase displacement processes in a variety of natural settings that are related to a wide range of applications, thus including the storage of carbon dioxide into deep saline aquifers. In this study, capillary pressure and relative permeability drainage curves are measured on a single Berea Sandstone core by using three different fluid pairs, namely gCO2/water, gN2/water and scCO2/brine. An important feature of this experimental investigation is that these two multiphase properties are obtained simultaneously during a core-flooding experiment. The applied technique possesses many of the characteristics of a conventional steady-state relative permeability experiment and consists of injecting the nonwetting fluid at increasingly higher flow rates in a core that is initially saturated with the wetting phase, while observing fluid saturations with a medical x-ray CT scanner [Pini et al. 2012]. Injection flow rates are varied so as to cover a sufficiently large range of capillary pressures, whereas fluid-pairs and experimental conditions are selected in order to move across a range interfacial tension values (40-65 mN/m), while maintaining a constant viscosity ratio

  14. Fluid core size of Mars from detection of the solar tide.

    PubMed

    Yoder, C F; Konopliv, A S; Yuan, D N; Standish, E M; Folkner, W M

    2003-04-11

    The solar tidal deformation of Mars, measured by its k2 potential Love number, has been obtained from an analysis of Mars Global Surveyor radio tracking. The observed k2 of 0.153 +/- 0.017 is large enough to rule out a solid iron core and so indicates that at least the outer part of the core is liquid. The inferred core radius is between 1520 and 1840 kilometers and is independent of many interior properties, although partial melt of the mantle is one factor that could reduce core size. Ice-cap mass changes can be deduced from the seasonal variations in air pressure and the odd gravity harmonic J3, given knowledge of cap mass distribution with latitude. The south cap seasonal mass change is about 30 to 40% larger than that of the north cap.

  15. Fluid core size of Mars from detection of the solar tide

    NASA Technical Reports Server (NTRS)

    Yoder, C. F.; Konopliv, A. S.; Yuan, D. N.; Standish, E. M.; Folkner, W. M.

    2003-01-01

    The solar tidal deformation of Mars, measured by its k2 potential Love number, has been obtained from an analysis of Mars Global Surveyor radio tracking. The observed k2 of 0.153 +/- 0.017 is large enough to rule out a solid iron core and so indicates that at least the outer part of the core is liquid. The inferred core radius is between 1520 and 1840 kilometers and is independent of many interior properties, although partial melt of the mantle is one factor that could reduce core size. Ice-cap mass changes can be deduced from the seasonal variations in air pressure and the odd gravity harmonic J3, given knowledge of cap mass distribution with latitude. The south cap seasonal mass change is about 30 to 40% larger than that of the north cap.

  16. Fluid Core Size of Mars from Detection of the Solar Tide

    NASA Astrophysics Data System (ADS)

    Yoder, C. F.; Konopliv, A. S.; Yuan, D. N.; Standish, E. M.; Folkner, W. M.

    2003-04-01

    The solar tidal deformation of Mars, measured by its k2 potential Love number, has been obtained from an analysis of Mars Global Surveyor radio tracking. The observed k2 of 0.153 +/- 0.017 is large enough to rule out a solid iron core and so indicates that at least the outer part of the core is liquid. The inferred core radius is between 1520 and 1840 kilometers and is independent of many interior properties, although partial melt of the mantle is one factor that could reduce core size. Ice-cap mass changes can be deduced from the seasonal variations in air pressure and the odd gravity harmonic J3, given knowledge of cap mass distribution with latitude. The south cap seasonal mass change is about 30 to 40% larger than that of the north cap.

  17. Fluid core size of Mars from detection of the solar tide

    NASA Technical Reports Server (NTRS)

    Yoder, C. F.; Konopliv, A. S.; Yuan, D. N.; Standish, E. M.; Folkner, W. M.

    2003-01-01

    The solar tidal deformation of Mars, measured by its k2 potential Love number, has been obtained from an analysis of Mars Global Surveyor radio tracking. The observed k2 of 0.153 +/- 0.017 is large enough to rule out a solid iron core and so indicates that at least the outer part of the core is liquid. The inferred core radius is between 1520 and 1840 kilometers and is independent of many interior properties, although partial melt of the mantle is one factor that could reduce core size. Ice-cap mass changes can be deduced from the seasonal variations in air pressure and the odd gravity harmonic J3, given knowledge of cap mass distribution with latitude. The south cap seasonal mass change is about 30 to 40% larger than that of the north cap.

  18. Modeling of viscoelastic properties of nonpermeable porous rocks saturated with highly viscous fluid at seismic frequencies at the core scale

    NASA Astrophysics Data System (ADS)

    Wang, Zizhen; Schmitt, Douglas R.; Wang, Ruihe

    2017-08-01

    A core scale modeling method for viscoelastic properties of rocks saturated with viscous fluid at low frequencies is developed based on the stress-strain method. The elastic moduli dispersion of viscous fluid is described by the Maxwell's spring-dash pot model. Based on this modeling method, we numerically test the effects of frequency, fluid viscosity, porosity, pore size, and pore aspect ratio on the storage moduli and the stress-strain phase lag of saturated rocks. And we also compared the modeling results to the Hashin-Shtrikman bounds and the coherent potential approximation (CPA). The dynamic moduli calculated from the modeling are lower than the predictions of CPA, and both of these fall between the Hashin-Shtrikman bounds. The modeling results indicate that the frequency and the fluid viscosity have similar effects on the dynamic moduli dispersion of fully saturated rocks. We observed the Debye peak in the phase lag variation with the change of frequency and viscosity. The pore structure parameters, such as porosity, pore size, and aspect ratio affect the rock frame stiffness and result in different viscoelastic behaviors of the saturated rocks. The stress-strain phase lags are larger with smaller stiffness contrasts between the rock frame and the pore fluid. The viscoelastic properties of saturated rocks are more sensitive to aspect ratio compared to other pore structure parameters. The results suggest that significant seismic dispersion (at about 50-200 Hz) might be expected for both compressional and shear waves passing through rocks saturated with highly viscous fluids.Plain Language SummaryWe develop a <span class="hlt">core</span> scale modeling method to simulate the viscoelastic properties of rocks saturated with viscous <span class="hlt">fluid</span> at low frequencies based on the stress-strain method. The elastic moduli dispersion of viscous <span class="hlt">fluid</span> is described by the Maxwell's spring-dash pot model. By using this modeling method, we numerically test</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19720014666','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19720014666"><span><span class="hlt">Fluid</span> flow analysis of a hot-<span class="hlt">core</span> hypersonic wind-tunnel nozzle concept</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Anders, J. B.; Sebacher, D. I.; Boatright, W. B.</p> <p>1972-01-01</p> <p>A hypersonic-wind-tunnel nozzle concept which incorporates a hot-<span class="hlt">core</span> flow surrounded by an annular flow of cold air offers a promising technique for maximizing the model size while minimizing the power required to heat the test <span class="hlt">core</span>. This capability becomes especially important when providing the true-temperature duplication needed for hypersonic propulsion testing. Several two-dimensional wind-tunnel nozzle configurations that are designed according to this concept are analyzed by using recently developed analytical techniques for prediction of the boundary-layer growth and the mixing between the hot and cold coaxial supersonic airflows. The analyses indicate that introduction of the cold annular flow near the throat results in an unacceptable test <span class="hlt">core</span> for the nozzle size and stagnation conditions considered because of both mixing and condensation effects. Use of a half-nozzle with a ramp on the flat portion does not appear promising because of the thick boundary layer associated with the extra length. However, the analyses indicate that if the cold annular flow is introduced at the exit of a full two-dimensional nozzle, an acceptable test <span class="hlt">core</span> will be produced. Predictions of the mixing between the hot and cold supersonic streams for this configuration show that mixing effects from the cold flow do not appreciably penetrate into the hot <span class="hlt">core</span> for the large downstream distances of interest.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23850271','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23850271"><span>Vesicle consisted of calcified <span class="hlt">core</span> and intervening turbid <span class="hlt">fluid</span>, a possible composition of calcification in intervertebral disc calcification in children.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lu, Zhang; Yong, Tang; Wen, Yuan; Yifei, Gu; Xinwei, Wang; Lili, Yang; Ye, Tian</p> <p>2013-09-01</p> <p>Intervertebral disc calcification (IDC) is one of the uncommon diseases in children. Normally, it is a benign lesion which is self-limited and has an excellent prognosis under conservative treatments and symptomatic support. Surgical treatment is usually carried out only for patients with progressive neurological deterioration in order to prevent the spinal cord from being irreversible injured. After conservative treatments for months or years, the calcification reduces gradually or even disappears through imaging. Until now, the etiology remains unclear and the mechanism for resorption of IDC is still unknown. Surgery was performed on an IDC patient with progressive neurological deterioration, it was found that the high density calcification region on CT is actually not "hard" but more like an enlarged cell. In such a cell, a calcified nuclear was surrounded by limewater-like liquid inside a large membrane. This study aims to unveil the mechanism for the resorption of IDC. We hypothesize that the high density calcification on imaging is a vesicle consisted of calcified <span class="hlt">core</span> and intervening turbid <span class="hlt">fluid</span>. Furthermore, the increase or diminution of calcification is caused by the production or resorption of inflammatory <span class="hlt">fluid</span> around the calcified <span class="hlt">core</span> in lesion disc. This could explain the mechanism of IDC resorption in children. Copyright © 2013 Elsevier Ltd. All rights reserved.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_2");'>2</a></li> <li><a href="#" onclick='return showDiv("page_3");'>3</a></li> <li class="active"><span>4</span></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_4 --> <div id="page_5" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_3");'>3</a></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li class="active"><span>5</span></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="81"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/21064546','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/21064546"><span>Modeling of the <span class="hlt">Fluid</span> Flow and Heat Transfer an a Pebble Bed Modular Reactor <span class="hlt">Core</span> With a Computational <span class="hlt">Fluid</span> Dynamics Code</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Taylor, J. Bryce; Yavuzkurt, Savas; Baratta, Anthony J.</p> <p>2002-07-01</p> <p>The Pebble Bed Modular Reactor (PBMR), a promising Generation IV nuclear reactor design, raises many novel technological issues for which new experience and techniques must be developed. This brief study explores a few of these issues, utilizes a computational <span class="hlt">fluid</span> dynamics code to model some simple phenomena, and points out deficiencies in current knowledge that should be addressed by future research and experimentation. A highly simplified representation of the PBMR <span class="hlt">core</span> is analyzed with FLUENT, a commercial computational <span class="hlt">fluid</span> dynamics code. The applied models examine laminar and turbulent flow in the vicinity of a single spherical fuel pebble near the center of the <span class="hlt">core</span>, accounting for the effects of the immediately adjacent fuel pebbles. Several important <span class="hlt">fluid</span> flow and heat transfer parameters are examined, including heat transfer coefficient, Nusselt number, and pressure drop, as well as the temperature, pressure, and velocity profiles near the fuel pebble. The results of these 'unit cell' calculations are also compared to empirical correlations available in the literature. As FLUENT is especially sensitive to geometry during the generation of a computational mesh, the sensitivity of code results to pebble spacing is also examined. The results of this study show that while a PBMR presents a novel and complex geometry, a code such as FLUENT is suitable for calculation of both local and global flow characteristics, and can be a valuable tool for the thermal-hydraulic study of this new reactor design. FLUENT results for pressure drop deviate from the Darcy correlation by several orders of magnitude in all cases. When determining the heat transfer coefficient, FLUENT is again much lower than Robinson's correlation. Results for Nusselt number show better agreement, with FLUENT predicting results that are 10 or 20 times as large as those from the Robinson and Lancashire correlations. These differences may arise because the empirical correlations concern mainly</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014PEPI..232...15T','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014PEPI..232...15T"><span>Resonant tidal excitation of internal waves in the Earth's <span class="hlt">fluid</span> <span class="hlt">core</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Tyler, Robert H.; Kuang, Weijia</p> <p>2014-07-01</p> <p>It has long been speculated that there is a stably stratified layer below the <span class="hlt">core</span>-mantle boundary, and two recent studies have improved the constraints on the parameters describing this stratification. Here we consider the dynamical implications of this layer using a simplified model. We first show that the stratification in this surface layer has sensitive control over the rate at which tidal energy is transferred to the <span class="hlt">core</span>. We then show that when the stratification parameters from the recent studies are used in this model, a resonant configuration arrives whereby tidal forces perform elevated rates of work in exciting <span class="hlt">core</span> flow. Specifically, the internal wave speed derived from the two independent studies (150 and 155 m/s) are in remarkable agreement with the speed (152 m/s) required for excitation of the primary normal mode of oscillation as calculated from full solutions of the Laplace Tidal Equations applied to a reduced-gravity idealized model representing the stratified layer. In evaluating this agreement it is noteworthy that the idealized model assumed may be regarded as the most reduced representation of the stratified dynamics of the layer, in that there are no non-essential dynamical terms in the governing equations assumed. While it is certainly possible that a more realistic treatment may require additional dynamical terms or coupling, it is also clear that this reduced representation includes no freedom for coercing the correlation described. This suggests that one must accept either (1) that tidal forces resonantly excite <span class="hlt">core</span> flow and this is predicted by a simple model or (2) that either the independent estimates or the dynamical model does not accurately portray the <span class="hlt">core</span> surface layer and there has simply been an unlikely coincidence between three estimates of a stratification parameter which would otherwise have a broad plausible range.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=20160013543&hterms=Internal+waves&qs=N%3D0%26Ntk%3DAll%26Ntx%3Dmode%2Bmatchall%26Ntt%3DInternal%2Bwaves','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=20160013543&hterms=Internal+waves&qs=N%3D0%26Ntk%3DAll%26Ntx%3Dmode%2Bmatchall%26Ntt%3DInternal%2Bwaves"><span>Resonant Tidal Excitation of Internal Waves in the Earth's <span class="hlt">Fluid</span> <span class="hlt">Core</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Tyler, Robert H.; Kuang, Weijia</p> <p>2014-01-01</p> <p>It has long been speculated that there is a stably stratified layer below the <span class="hlt">core</span>-mantle boundary, and two recent studies have improved the constraints on the parameters describing this stratification. Here we consider the dynamical implications of this layer using a simplified model. We first show that the stratification in this surface layer has sensitive control over the rate at which tidal energy is transferred to the <span class="hlt">core</span>. We then show that when the stratification parameters from the recent studies are used in this model, a resonant configuration arrives whereby tidal forces perform elevated rates of work in exciting <span class="hlt">core</span> flow. Specifically, the internal wave speed derived from the two independent studies (150 and 155 m/s) are in remarkable agreement with the speed (152 m/s) required for excitation of the primary normal mode of oscillation as calculated from full solutions of the Laplace Tidal Equations applied to a reduced-gravity idealized model representing the stratified layer. In evaluating this agreement it is noteworthy that the idealized model assumed may be regarded as the most reduced representation of the stratified dynamics of the layer, in that there are no non-essential dynamical terms in the governing equations assumed. While it is certainly possible that a more realistic treatment may require additional dynamical terms or coupling, it is also clear that this reduced representation includes no freedom for coercing the correlation described. This suggests that one must accept either (1) that tidal forces resonantly excite <span class="hlt">core</span> flow and this is predicted by a simple model or (2) that either the independent estimates or the dynamical model does not accurately portray the <span class="hlt">core</span> surface layer and there has simply been an unlikely coincidence between three estimates of a stratification parameter which would otherwise have a broad plausible range.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=20160013543&hterms=core&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D90%26Ntt%3Dcore','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=20160013543&hterms=core&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D90%26Ntt%3Dcore"><span>Resonant Tidal Excitation of Internal Waves in the Earth's <span class="hlt">Fluid</span> <span class="hlt">Core</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Tyler, Robert H.; Kuang, Weijia</p> <p>2014-01-01</p> <p>It has long been speculated that there is a stably stratified layer below the <span class="hlt">core</span>-mantle boundary, and two recent studies have improved the constraints on the parameters describing this stratification. Here we consider the dynamical implications of this layer using a simplified model. We first show that the stratification in this surface layer has sensitive control over the rate at which tidal energy is transferred to the <span class="hlt">core</span>. We then show that when the stratification parameters from the recent studies are used in this model, a resonant configuration arrives whereby tidal forces perform elevated rates of work in exciting <span class="hlt">core</span> flow. Specifically, the internal wave speed derived from the two independent studies (150 and 155 m/s) are in remarkable agreement with the speed (152 m/s) required for excitation of the primary normal mode of oscillation as calculated from full solutions of the Laplace Tidal Equations applied to a reduced-gravity idealized model representing the stratified layer. In evaluating this agreement it is noteworthy that the idealized model assumed may be regarded as the most reduced representation of the stratified dynamics of the layer, in that there are no non-essential dynamical terms in the governing equations assumed. While it is certainly possible that a more realistic treatment may require additional dynamical terms or coupling, it is also clear that this reduced representation includes no freedom for coercing the correlation described. This suggests that one must accept either (1) that tidal forces resonantly excite <span class="hlt">core</span> flow and this is predicted by a simple model or (2) that either the independent estimates or the dynamical model does not accurately portray the <span class="hlt">core</span> surface layer and there has simply been an unlikely coincidence between three estimates of a stratification parameter which would otherwise have a broad plausible range.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011AGUFM.V21B2503F','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011AGUFM.V21B2503F"><span>Evolution of <span class="hlt">fluid</span>-rock interactions: <span class="hlt">fluid</span> inclusion, isotopic, and major/minor element chemistry of hydrothermally altered volcanic rock in <span class="hlt">core</span> RN-17B, Reykjanes, Iceland</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Fowler, A. P.; Zierenberg, R. A.; Schiffman, P.; Marks, N. E.; Fridleifsson, G. O.</p> <p>2011-12-01</p> <p>The Reykjanes Peninsula, Iceland, hosts a seawater-dominated geothermal system. Previous studies indicate an evolution of the system from meteoric to seawater. The inclined 4-inch diameter RN-17B drill <span class="hlt">core</span> was collected from 2798.5 m to 2808.5 m (~2555 m below surface) at in situ temperature of approximately 330°C. Samples for this study were obtained from the Iceland Deep Drilling Project (IDDP). The <span class="hlt">core</span> contains hydrothermally altered rocks of basaltic composition. Hydrothermal alteration ranges from upper greenschist to lower amphibolite grade, dependent on protolith size and composition. Veins in the <span class="hlt">core</span> grade inward from radial epidote + acicular hornblende + titanite + pyrite, to clearer equant and compositionally zoned epidote vein centers. Felted amphibole replaces hyaloclastite and smaller crystalline clasts within the <span class="hlt">core</span>, but is absent from the centers of crystalline pillow basalt fragments. Amphibole in vein selvages and vesicle fillings is green and acicular. Electron microprobe analyses of amphibole indicate it spans a compositional range of ferrohornblende through paragasite. The pistacite component (Xps) of vein epidote ranges from 16.5 to 36.7. The Xps component shows both normal and reverse zoning within single epidote crystals across this range, and follows no distinct pattern. Vein epidote adjacent to the wall rock has a higher aluminum concentration than vein centers. This may be due to mobilization of aluminum from plagioclase in the wall rock during albitization. Solutions flowing through open fractures may have lower Al-content and thus precipitate more Fe-rich epidote than those next to the fracture walls. Primary <span class="hlt">fluid</span> inclusions in epidote range in size from <1 to 10 μm in diameter. Secondary <span class="hlt">fluid</span> inclusions are <1 μm in diameter and not measurable. Calculated <span class="hlt">fluid</span> inclusion salinities range from 0.5 to 7.6 weight percent NaCl, with lower salinities adjacent to the wall rock and higher salinities in the vein centers</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016PhRvD..93l4012L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016PhRvD..93l4012L"><span>Regular black holes: Guilfoyle's electrically charged solutions with a perfect <span class="hlt">fluid</span> phantom <span class="hlt">core</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Lemos, José P. S.; Zanchin, Vilson T.</p> <p>2016-06-01</p> <p>Regular black hole solutions are found among the Guilfoyle exact solutions. These are spherically symmetric solutions of general relativity coupled to Maxwell's electromagnetism and charged matter where the metric potentials and electromagnetic fields are related in some particularly simple form. We show that, for certain ranges of the parameters, there are objects which correspond to regular charged black holes, whose interior region is filled by an electrically charged phantomlike <span class="hlt">fluid</span>, or, in the limiting case, a de Sitter false vacuum <span class="hlt">fluid</span>, and whose exterior region is Reissner-Nordström. The boundary between both regions is a smooth boundary surface, except in the limiting case where the boundary is made of a massless electrically charged spherically symmetric coat. The main physical and geometrical properties of such charged regular solutions are analyzed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19820017728','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19820017728"><span>Investigation of geomagnetic field forecasting and <span class="hlt">fluid</span> dynamics of the <span class="hlt">core</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Benton, E. R. (Principal Investigator)</p> <p>1982-01-01</p> <p>Accomplishments to date were summarized in three parts submitted for publication. Goddard models and MAGSAT data were used heavily in the investigation which address: (1) the sensitivity of selected geomagnetic properties to truncation level of spherical harmonic expansions; (2) the pole strength of the Earth from MAGSAT, and magnetic determination of the <span class="hlt">core</span> radius; and (3) frozen flux upper limits to the MAGSAT geomagnetic coefficients and relative multipole indices for Earth.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2005AGUFM.T33G..06B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2005AGUFM.T33G..06B"><span>Mass Transfer and <span class="hlt">Fluid</span> Flow During Detachment Faulting and Development of an Oceanic <span class="hlt">Core</span> Complex, Atlantis Massif</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Boschi, C.; Fruh-Green, G. L.; Karson, J. A.; Kelley, D. S.</p> <p>2005-12-01</p> <p>The Atlantis Massif (Mid-Atlantic Ridge, 30°N) is an example of an oceanic <span class="hlt">core</span> complex (OCC) exposed by a major fault system. Our integrated field and analytical study of mafic and ultramafic rocks exposed on the south wall of the massif provide new insights into how major detachment shear zones evolve during the development of OCCs and demonstrates the complex interplay of <span class="hlt">fluids</span>, mass transfer, and metamorphism in strain localization associated with this process. Pervasive talc-amphibole-chlorite metasomatism as well as heterogeneous, crystal-plastic and cataclastic deformation characterize a strongly foliated, 100-m-thick zone of detachment faulting. Metasomatic fault rocks are key elements of this OCC and record a deformation and metamorphic history that is distinct from the underlying basement rocks. Talc-rich fault rocks, consisting of fine-grained syntectonic talc, amphibole and chlorite, preserve textural and geochemical characteristics of their ultramafic protoliths. Although primary textures and mineral parageneses are commonly obliterated in rocks dominated by amphibole, bulk rock data point to a mafic protolith. Major and trace elements indicate a complex mutual interaction between mafic and ultramafic rocks during metasomatism and suggest localized circulation of oxidizing, Si-Al-Ca-rich <span class="hlt">fluids</span> in high strain deformation zones. This type of flow was distinct from the more pervasive circulation that led to strongly serpentinized domains in the south wall. The talc-rich assemblages and microstructures in the fault rocks indicate multiple phases of <span class="hlt">fluid</span> infiltration and high strain-deformation in limited domains and that pre-existing, high-temperature deformation zones in the lithologically heterogeneous lithosphere served as permeable pathways for subsequent localized <span class="hlt">fluid</span> flow and greenschist-facies alteration and metasomatism. In contrast, cataclastic microfracturing is associated with a dominantly static metasomatism in less deformed domains</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19960047459','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19960047459"><span>A Computational <span class="hlt">Fluid</span> Dynamic and Heat Transfer Model for Gaseous <span class="hlt">Core</span> and Gas Cooled Space Power and Propulsion Reactors</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Anghaie, S.; Chen, G.</p> <p>1996-01-01</p> <p>A computational model based on the axisymmetric, thin-layer Navier-Stokes equations is developed to predict the convective, radiation and conductive heat transfer in high temperature space nuclear reactors. An implicit-explicit, finite volume, MacCormack method in conjunction with the Gauss-Seidel line iteration procedure is utilized to solve the thermal and <span class="hlt">fluid</span> governing equations. Simulation of coolant and propellant flows in these reactors involves the subsonic and supersonic flows of hydrogen, helium and uranium tetrafluoride under variable boundary conditions. An enthalpy-rebalancing scheme is developed and implemented to enhance and accelerate the rate of convergence when a wall heat flux boundary condition is used. The model also incorporated the Baldwin and Lomax two-layer algebraic turbulence scheme for the calculation of the turbulent kinetic energy and eddy diffusivity of energy. The Rosseland diffusion approximation is used to simulate the radiative energy transfer in the optically thick environment of gas <span class="hlt">core</span> reactors. The computational model is benchmarked with experimental data on flow separation angle and drag force acting on a suspended sphere in a cylindrical tube. The heat transfer is validated by comparing the computed results with the standard heat transfer correlations predictions. The model is used to simulate flow and heat transfer under a variety of design conditions. The effect of internal heat generation on the heat transfer in the gas <span class="hlt">core</span> reactors is examined for a variety of power densities, 100 W/cc, 500 W/cc and 1000 W/cc. The maximum temperature, corresponding with the heat generation rates, are 2150 K, 2750 K and 3550 K, respectively. This analysis shows that the maximum temperature is strongly dependent on the value of heat generation rate. It also indicates that a heat generation rate higher than 1000 W/cc is necessary to maintain the gas temperature at about 3500 K, which is typical design temperature required to achieve high</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015AGUFM.H43F1583B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015AGUFM.H43F1583B"><span>A Direct-Push Sample-Freezing Drive Shoe for Collecting Sediment <span class="hlt">Cores</span> with Intact Pore <span class="hlt">Fluid</span>, Microbial, and Sediment Distributions</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Bekins, B. A.; Trost, J.; Christy, T. M.; Mason, B.</p> <p>2015-12-01</p> <p>Abiotic and biological reactions in shallow groundwater and bottom sediments are central to understanding groundwater contaminant attenuation and biogeochemical cycles. The laminar flow regime in unconsolidated surficial aquifers creates narrow reaction zones. Studying these reaction zones requires fine-scale sampling of water together with adjacent sediment in a manner that preserves in situ redox conditions. Collecting representative samples of these narrow zones with traditional subsurface sampling equipment is challenging. For example, use of a basket type <span class="hlt">core</span> catcher for saturated, non-cohesive sediments results in loss of <span class="hlt">fluid</span> and sediments during retrieval. A sample-freezing drive shoe designed for a wire line piston <span class="hlt">core</span> sampler allowed collection of <span class="hlt">cores</span> with intact sediment, microbial, and pore <span class="hlt">fluid</span> distributions and has been the basis for studies documenting centimeter-scale variations in aquifer microbial populations (Murphy and Herkelrath, 1996). However, this freezing drive shoe design is not compatible with modern-day direct push sampling rigs. A re-designed sample-freezing drive shoe compatible with a direct-push dual-tube <span class="hlt">coring</span> system was developed and field-tested. The freezing drive shoe retained sediment and <span class="hlt">fluid</span> distributions in saturated sediment <span class="hlt">core</span> samples by freezing a 10 centimeter plug below the <span class="hlt">core</span> sample with liquid CO­2. <span class="hlt">Core</span> samples collected across the smear zone at a crude oil spill site near Bemidji, Minnesota, were successfully extracted without loss of <span class="hlt">fluid</span> or sediment. Multiple <span class="hlt">core</span> sections from different depths in the aquifer were retrieved from a single hole. This new design makes a highly effective sampling technology available on modern-day direct push sampling equipment to inform myriad questions about subsurface biogeochemistry processes. The re-design of the freezing drive shoe was supported by the USGS Innovation Center for Earth Sciences. References: Murphy, Fred, and W. N. Herkelrath. "A sample</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016PhRvE..93f2112F','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016PhRvE..93f2112F"><span>Density functional formulation of the random-phase approximation for inhomogeneous <span class="hlt">fluids</span>: Application to the Gaussian <span class="hlt">core</span> and Coulomb particles</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Frydel, Derek; Ma, Manman</p> <p>2016-06-01</p> <p>Using the adiabatic connection, we formulate the free energy in terms of the correlation function of a fictitious system, hλ(r ,r') , in which interactions λ u (r ,r') are gradually switched on as λ changes from 0 to 1. The function hλ(r ,r') is then obtained from the inhomogeneous Ornstein-Zernike equation and the two equations constitute a general liquid-state framework for treating inhomogeneous <span class="hlt">fluids</span>. The two equations do not yet constitute a closed set. In the present work we use the closure cλ(r ,r') ≈-λ β u (r ,r') , known as the random-phase approximation (RPA). We demonstrate that the RPA is identical with the variational Gaussian approximation derived within the field-theoretical framework, originally derived and used for charged particles. We apply our generalized RPA approximation to the Gaussian <span class="hlt">core</span> model and Coulomb charges.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27415213','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27415213"><span>Density functional formulation of the random-phase approximation for inhomogeneous <span class="hlt">fluids</span>: Application to the Gaussian <span class="hlt">core</span> and Coulomb particles.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Frydel, Derek; Ma, Manman</p> <p>2016-06-01</p> <p>Using the adiabatic connection, we formulate the free energy in terms of the correlation function of a fictitious system, h_{λ}(r,r^{'}), in which interactions λu(r,r^{'}) are gradually switched on as λ changes from 0 to 1. The function h_{λ}(r,r^{'}) is then obtained from the inhomogeneous Ornstein-Zernike equation and the two equations constitute a general liquid-state framework for treating inhomogeneous <span class="hlt">fluids</span>. The two equations do not yet constitute a closed set. In the present work we use the closure c_{λ}(r,r^{'})≈-λβu(r,r^{'}), known as the random-phase approximation (RPA). We demonstrate that the RPA is identical with the variational Gaussian approximation derived within the field-theoretical framework, originally derived and used for charged particles. We apply our generalized RPA approximation to the Gaussian <span class="hlt">core</span> model and Coulomb charges.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015Tecto..34..680M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015Tecto..34..680M"><span>Eocene and Miocene extension, meteoric <span class="hlt">fluid</span> infiltration, and <span class="hlt">core</span> complex formation in the Great Basin (Raft River Mountains, Utah)</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Methner, Katharina; Mulch, Andreas; Teyssier, Christian; Wells, Michael L.; Cosca, Michael A.; Gottardi, Raphaël.; Gébelin, Aude; Chamberlain, C. Page</p> <p>2015-04-01</p> <p>Metamorphic <span class="hlt">core</span> complexes (MCCs) in the North American Cordillera reflect the effects of lithospheric extension and contribute to crustal adjustments both during and after a protracted subduction history along the Pacific plate margin. While the Miocene-to-recent history of most MCCs in the Great Basin, including the Raft River-Albion-Grouse Creek MCC, is well documented, early Cenozoic tectonic fabrics are commonly severely overprinted. We present stable isotope, geochronological (40Ar/39Ar), and microstructural data from the Raft River detachment shear zone. Hydrogen isotope ratios of syntectonic white mica (δ2Hms) from mylonitic quartzite within the shear zone are very low (-90‰ to -154‰, Vienna SMOW) and result from multiphase synkinematic interaction with surface-derived <span class="hlt">fluids</span>. 40Ar/39Ar geochronology reveals Eocene (re)crystallization of white mica with δ2Hms ≥ -154‰ in quartzite mylonite of the western segment of the detachment system. These δ2Hms values are distinctively lower than in localities farther east (δ2Hms ≥ -125‰), where 40Ar/39Ar geochronological data indicate Miocene (18-15 Ma) extensional shearing and mylonitic fabric formation. These data indicate that very low δ2H surface-derived <span class="hlt">fluids</span> penetrated the brittle-ductile transition as early as the mid-Eocene during a first phase of exhumation along a detachment rooted to the east. In the eastern part of the <span class="hlt">core</span> complex, prominent top-to-the-east ductile shearing, mid-Miocene 40Ar/39Ar ages, and higher δ2H values of recrystallized white mica, indicate Miocene structural and isotopic overprinting of Eocene fabrics.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://pubs.er.usgs.gov/publication/70189246','USGSPUBS'); return false;" href="http://pubs.er.usgs.gov/publication/70189246"><span>Eocene and Miocene extension, meteoric <span class="hlt">fluid</span> infiltration, and <span class="hlt">core</span> complex formation in the Great Basin (Raft River Mountains, Utah)</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Methner, Katharina; Mulch, Andreas; Teyssier, Christian; Wells, Michael L.; Cosca, Michael A.; Gottardi, Raphael; Gebelin, Aude; Chamberlain, C. Page</p> <p>2015-01-01</p> <p>Metamorphic <span class="hlt">core</span> complexes (MCCs) in the North American Cordillera reflect the effects of lithospheric extension and contribute to crustal adjustments both during and after a protracted subduction history along the Pacific plate margin. While the Miocene-to-recent history of most MCCs in the Great Basin, including the Raft River-Albion-Grouse Creek MCC, is well documented, early Cenozoic tectonic fabrics are commonly severely overprinted. We present stable isotope, geochronological (40Ar/39Ar), and microstructural data from the Raft River detachment shear zone. Hydrogen isotope ratios of syntectonic white mica (δ2Hms) from mylonitic quartzite within the shear zone are very low (−90‰ to −154‰, Vienna SMOW) and result from multiphase synkinematic interaction with surface-derived <span class="hlt">fluids</span>. 40Ar/39Ar geochronology reveals Eocene (re)crystallization of white mica with δ2Hms ≥ −154‰ in quartzite mylonite of the western segment of the detachment system. These δ2Hms values are distinctively lower than in localities farther east (δ2Hms ≥ −125‰), where 40Ar/39Ar geochronological data indicate Miocene (18–15 Ma) extensional shearing and mylonitic fabric formation. These data indicate that very low δ2H surface-derived <span class="hlt">fluids</span> penetrated the brittle-ductile transition as early as the mid-Eocene during a first phase of exhumation along a detachment rooted to the east. In the eastern part of the <span class="hlt">core</span> complex, prominent top-to-the-east ductile shearing, mid-Miocene 40Ar/39Ar ages, and higher δ2H values of recrystallized white mica, indicate Miocene structural and isotopic overprinting of Eocene fabrics.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28861563','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28861563"><span>Metal-based magnetic <span class="hlt">fluids</span> with <span class="hlt">core</span>-shell structure FeB@SiO2 amorphous particles.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Yu, Mengchun; Bian, Xiufang; Wang, Tianqi; Wang, Junzhang</p> <p>2017-09-27</p> <p>FeB@SiO2 amorphous particles were firstly introduced into Ga85.8In14.2 alloys to prepare metal-based magnetic <span class="hlt">fluids</span>. The morphology of the FeB amorphous particles is spherical with an average particle size of about 190 nm. The shape of the particles is regular and the particle size is homogeneous. Stable <span class="hlt">core</span>-shell structure SiO2 modified FeB amorphous particles are obtained and the thickness of the SiO2 coatings is observed to be about 40 nm. The results of VSM confirm that the saturation magnetization of the FeB amorphous particles is 131.5 emu g(-1), which is almost two times higher than that of the Fe3O4 particles. The saturation magnetization of the FeB@SiO2 amorphous particles is 106.9 emu g(-1), an approximate decrease of 18.7% due to the non-magnetic SiO2 coatings. The results from the torsional oscillation viscometer show that the metal-based magnetic <span class="hlt">fluids</span> with FeB amorphous particles exhibit a desirable high temperature performance and are ideal candidates for high temperature use.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4668574','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4668574"><span>Laser-tuned whispering gallery modes in a solid-<span class="hlt">core</span> microstructured optical fibre integrated with magnetic <span class="hlt">fluids</span></span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Lin, Wei; Zhang, Hao; Liu, Bo; Song, Binbin; Li, Yuetao; Yang, Chengkun; Liu, Yange</p> <p>2015-01-01</p> <p>A laser-assisted tuning method of whispering gallery modes (WGMs) in a cylindrical microresonator based on magnetic-<span class="hlt">fluids</span>-infiltrated microstructured optical fibres (MFIMOFs, where MF and MOF respectively refer to magnetic <span class="hlt">fluid</span> and microstructured optical fibre) is proposed, experimentally demonstrated and theoretically analysed in detail. The MFIMOF is prepared by infiltrating the air-hole array of the MOF using capillary action effect. A fibre-coupling system is set up for the proposed MFIMOF-based microresonator to acquire an extinction ratio up to 25 dB and a Q-factor as large as 4.0 × 104. For the MF-infiltrated MOF, the light propagating in the fibre <span class="hlt">core</span> region would rapidly spread out and would be absorbed by the MF-rod array cladding to induce significant thermal effect. This has been exploited to achieve a WGM resonance wavelength sensitivity of 0.034 nm/mW, which is ~20 times higher than it counterpart without MF infiltration. The wavelength response of the resonance dips exhibit linear power dependence, and owing to such desirable merits as ease of fabrication, high sensitivity and laser-assisted tunability, the proposed optical tuning approach of WGMs in the MFIMOF would find promising applications in the areas of optical filtering, sensing, and signal processing, as well as future all-optical networking systems. PMID:26632445</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19860014592','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19860014592"><span>Constraints on geomagnetic secular variation modeling from electromagnetism and <span class="hlt">fluid</span> dynamics of the Earth's <span class="hlt">core</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Benton, E. R.</p> <p>1986-01-01</p> <p>A spherical harmonic representation of the geomagnetic field and its secular variation for epoch 1980, designated GSFC(9/84), is derived and evaluated. At three epochs (1977.5, 1980.0, 1982.5) this model incorporates conservation of magnetic flux through five selected patches of area on the <span class="hlt">core</span>/mantle boundary bounded by the zero contours of vertical magnetic field. These fifteen nonlinear constraints are included like data in an iterative least squares parameter estimation procedure that starts with the recently derived unconstrained field model GSFC (12/83). Convergence is approached within three iterations. The constrained model is evaluated by comparing its predictive capability outside the time span of its data, in terms of residuals at magnetic observatories, with that for the unconstrained model.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016JNR....18..365A','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016JNR....18..365A"><span>Gas phase synthesis of <span class="hlt">core</span>-shell Fe@FeO x magnetic nanoparticles into <span class="hlt">fluids</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Aktas, Sitki; Thornton, Stuart C.; Binns, Chris; Denby, Phil</p> <p>2016-12-01</p> <p>Sorbitol, short chain molecules, have been used to stabilise of Fe@FeO x nanoparticles produced in the gas phase under the ultra-high vacuum (UHV) conditions. The sorbitol coated Fe@FeO x nanoparticles produced by our method have a narrow size distribution with a hydrodynamic diameter of 35 nm after NaOH is added to the solution. Magnetisation measurement shows that the magnetic nanoparticles are superparamagnetic at 100 K and demonstrate hysteresis at 5 K with an anisotropy constant of 5.31 × 104 J/m3 (similar to bulk iron). Also, it is shown that sorbitol is only suitable for stabilising the Fe@FeO x suspensions, and it does not prevent further oxidation of the metallic Fe <span class="hlt">core</span>. According to MRI measurement, the nanoparticles have a high transverse relaxation rate of 425 mM-1 s-1.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1996APS..DFD..BG02M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1996APS..DFD..BG02M"><span><span class="hlt">Fluid</span> Dynamic Eqs.For Adiabatic Convection In Earth's Ultracompressed <span class="hlt">Core</span>; Turbulence Engendered Large-Scale Motions.</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>McDonald, K. L.</p> <p>1996-11-01</p> <p>Our analysis is divided into 2 parts, i.e., establishing formalism that predicts (a), convective flows in Earth's, molten, precessing, <span class="hlt">core</span> that arise from 15-20 heat sources distributed over solid inner <span class="hlt">core</span> boundary, r=R_ic, how they induce B-field reversals and transport heat of 4 radioactive disintegration chains (some now inactive) contained within, r<= R_ic, and (b) turbulence-en-gendered large-scale \\underlinemer. motion and \\underlineturbulent different rot., which are coupled by Coriolis forces. Beginning with Navier-Stokes eq. we write for Earth's <span class="hlt">core</span>, ρ dv/dt = ρga + 2 ρ v × Υ -nabla p + (4 π μ)-1 (nabla × B) × B + η nabla^2 v + η \\over 3 nabla (nabla - v) -2 \\over 3 (nabla - v) nabla η + nabla η - nabla v + nabla v - nabla η, where ga is appar. acceleration of gravity. Since coeff. of viscosity η depends only on p, T it is closely only a function of r; η = η(r), altho η = const. will suffice for convection calculations. In \\underlineeq. of secular <span class="hlt">fluid</span> motion, obtained by forming ensemble mean of vector curl of N-S eq., viscous forces are driving forces and last 3 terms should be retained. Eq. of continuity remains as before but state eq. p = ρkT and adiabaticity eq. for perfect gas fail to apply to liquids and we must adopt eqs. for ultracompressed <span class="hlt">fluids</span>^1, namely, \\underlinestate eq., κ (p=p_o) = loge ρ/ ρo + \\varepsilon (T-T_o) and \\underlineadiabatic eq., Te ^a/ρ= const., α = Mw \\varepsilon/κ c_V; cV is molar thermal capacity, etc. We subst. this into state equation to avoid dependent variable T getting a p-ρ form of adiabatic law: κ (p-p_o) = log ρ/ρo + \\varepsilon T_o[e^α(ρ_o-1 - ρ-1) - 1] dot = [1 + \\varepsilon α T_o/ρ_o] - (ρ - ρ_o)/ρ_o, r.h. approx. used in \\underlinediscrete juxtaposition. ^1 [-2.3pt] ^1 K L McDonald, Computations In Theoretical Physics ..., Univ. Ut., Expt. Sta. Bul. 138, Vol. 56, No. 27(1966), 129 pp.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2002EGSGA..27.3068F','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2002EGSGA..27.3068F"><span>Spin-up From Rest In A Stratified <span class="hlt">Fluid</span>: <span class="hlt">Core</span> Flows</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Flor, J. B.; Bush, J. W. M.; Ungarish, M.</p> <p></p> <p>We investigate the spin-up from rest of a stratified <span class="hlt">fluid</span> with initial Brunt-Väisälä fre- quency N bound within a cylindrical container of height H and radius R which is set to rotate impulsively with angular speed . The initial phase of motion is marked by the establishment of axisymmetric corner vortices fed by radial Ekman transport, a process detailed in Flor, Ungarish &Bush (2001). The subsequent evolution of the central vortex depends critically on N/f. For N/f > 1 and H/R > 1, the axisymme- try of the system is retained throughout the spin-up process: the central vortex attains a state of near solid body rotation by the diffusion of vorticity from the sidewalls. For N/f > 1 and H/R < 1, the central vortex breaks up into a series of vertical vortices that enhance transfer of angular momentum from the boundaries and so expedite the spin-up process. For N/f < 1, the central vortex becomes unstable through a tilting instability. In a short tank, this is marked by a simple tipping of the central stratified vortex. In a tall tank, the centerline of the central vortex is twisted from its vertical po- sition, and the resulting instability gives rise to a stack of vortices with approximately constant Burger ratio Nh/fR.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_3");'>3</a></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li class="active"><span>5</span></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_5 --> <div id="page_6" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li class="active"><span>6</span></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="101"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/22233604','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/22233604"><span>Continuum-kinetic-microscopic model of lung clearance due to <span class="hlt">core</span>-annular <span class="hlt">fluid</span> entrainment</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Mitran, Sorin</p> <p>2013-07-01</p> <p>The human lung is protected against aspirated infectious and toxic agents by a thin liquid layer lining the interior of the airways. This airway surface liquid is a bilayer composed of a viscoelastic mucus layer supported by a <span class="hlt">fluid</span> film known as the periciliary liquid. The viscoelastic behavior of the mucus layer is principally due to long-chain polymers known as mucins. The airway surface liquid is cleared from the lung by ciliary transport, surface tension gradients, and airflow shear forces. This work presents a multiscale model of the effect of airflow shear forces, as exerted by tidal breathing and cough, upon clearance. The composition of the mucus layer is complex and variable in time. To avoid the restrictions imposed by adopting a viscoelastic flow model of limited validity, a multiscale computational model is introduced in which the continuum-level properties of the airway surface liquid are determined by microscopic simulation of long-chain polymers. A bridge between microscopic and continuum levels is constructed through a kinetic-level probability density function describing polymer chain configurations. The overall multiscale framework is especially suited to biological problems due to the flexibility afforded in specifying microscopic constituents, and examining the effects of various constituents upon overall mucus transport at the continuum scale.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013JCoPh.244..193M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013JCoPh.244..193M"><span>Continuum-kinetic-microscopic model of lung clearance due to <span class="hlt">core</span>-annular <span class="hlt">fluid</span> entrainment</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Mitran, Sorin</p> <p>2013-07-01</p> <p>The human lung is protected against aspirated infectious and toxic agents by a thin liquid layer lining the interior of the airways. This airway surface liquid is a bilayer composed of a viscoelastic mucus layer supported by a <span class="hlt">fluid</span> film known as the periciliary liquid. The viscoelastic behavior of the mucus layer is principally due to long-chain polymers known as mucins. The airway surface liquid is cleared from the lung by ciliary transport, surface tension gradients, and airflow shear forces. This work presents a multiscale model of the effect of airflow shear forces, as exerted by tidal breathing and cough, upon clearance. The composition of the mucus layer is complex and variable in time. To avoid the restrictions imposed by adopting a viscoelastic flow model of limited validity, a multiscale computational model is introduced in which the continuum-level properties of the airway surface liquid are determined by microscopic simulation of long-chain polymers. A bridge between microscopic and continuum levels is constructed through a kinetic-level probability density function describing polymer chain configurations. The overall multiscale framework is especially suited to biological problems due to the flexibility afforded in specifying microscopic constituents, and examining the effects of various constituents upon overall mucus transport at the continuum scale.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/932890','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/932890"><span><span class="hlt">Fluid</span>-Rock Characterization for NMR Well Logging and Special <span class="hlt">Core</span> Analysis</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>George Hirasaki; Kishore Mohanty</p> <p>2007-12-31</p> <p>The overall objective of this effort is to develop, build and test a high-speed drilling motor that can meet the performance guidelines of the announcement, namely: 'The motors are expected to rotate at a minimum of 10,000 rpm, have an OD no larger than 7 inches and work downhole continuously for at least 100 hours. The motor must have common oilfield thread connections capable of making up to a drill bit and bottomhole assembly. The motor must be capable of transmitting drilling <span class="hlt">fluid</span> through the motor'. To these goals, APS would add that the motor must be economically viable, in terms of both its manufacturing and maintenance costs, and be applicable to as broad a range of markets as possible. APS has taken the approach of using a system using planetary gears to increase the speed of a conventional mud motor to 10,000 rpm. The mud flow is directed around the outside of the gear train, and a unique flow diversion system has been employed. A prototype of the motor was built and tested in APS's high-pressure flow loop. The motor operated per the model up to {approx}4200 rpm. At that point a bearing seized and the performance was severely degraded. The motor is being rebuilt and will be retested outside of this program.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2006PhRvE..73f1507G','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2006PhRvE..73f1507G"><span>Metastable liquid-liquid coexistence and density anomalies in a <span class="hlt">core</span>-softened <span class="hlt">fluid</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Gibson, H. M.; Wilding, N. B.</p> <p>2006-06-01</p> <p>Linearly sloped or “ramp” potentials belong to a class of <span class="hlt">core</span>-softened models which possess a liquid-liquid critical point (LLCP) in addition to the usual liquid-gas critical point. Furthermore, they exhibit thermodynamic anomalies in their density and compressibility, the nature of which may be akin to those occurring in water. Previous simulation studies of ramp potentials have focused on just one functional form, for which the LLCP is thermodynamically stable. In this work we construct a series of ramp potentials, which interpolate between this previously studied form and a ramp-based approximation to the Lennard-Jones (LJ) potential. By means of Monte Carlo simulation, we locate the LLCP, the first order high density liquid (HDL)-low density liquid (LDL) coexistence line, and the line of density maxima for a selection of potentials in the series. We observe that as the LJ limit is approached, the LLCP becomes metastable with respect to freezing into a hexagonal close packed crystalline solid. The qualitative nature of the phase behavior in this regime shows a remarkable resemblance to that seen in simulation studies of accurate water models. Specifically, the density of the liquid phase exceeds that of the solid; the gradient of the metastable LDL-HDL line is negative in the pressure (p) -temperature (T) plane; while the line of density maxima in the p-T plane has a shape similar to that seen in water and extends into the stable liquid region of the phase diagram. As such, our results lend weight to the “second critical point” hypothesis as an explanation for the anomalous behavior of water.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19990042410&hterms=criticism&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3Dcriticism','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19990042410&hterms=criticism&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3Dcriticism"><span>The Topographic Torque on a Bounding Surface of a Rotating Gravitating <span class="hlt">Fluid</span> and the Excitation by <span class="hlt">Core</span> Motions of Decadal Fluctuations in the Earth's Rotation</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Hide, Raymond</p> <p>1995-01-01</p> <p>General expressions (with potential applications in several areas of geophysical <span class="hlt">fluid</span> dynamics) are derived for all three components of the contribution made by the geostrophic part of the pressure field associated with flow in a rotating gravitating <span class="hlt">fluid</span> to the topographic torque exerted by the <span class="hlt">fluid</span> on a rigid impermeable bounding surface of any shape. When applied to the Earth's liquid metallic <span class="hlt">core</span>, which is bounded by nearly spherical surfaces and can be divided into two main regions, the "torosphere" and "polosphere," the expressions reduce to formulae given previously by the author, thereby providing further support for his work and that of others on the role of topographic coupling at the <span class="hlt">core</span>-mantle boundary in the excitation by <span class="hlt">core</span> motions of Earth rotation fluctuations on decadal time scales. They also show that recent criticisms of that work are vitiated by mathematical and physical errors. Contrary to these criticisms, the author's scheme for exploiting Earth rotation and other geophysical data (either real or simulated in computer models) in quantitative studies of the topography of the <span class="hlt">core</span>-mantle boundary (CMB) by intercomparing various models of (a) motions in the <span class="hlt">core</span> based on geomagnetic secular variation data and (b) CMB topography based on seismological and gravity data has a sound theoretical basis. The practical scope of the scheme is of course limited by the accuracy of real data, but this is a matter for investigation, not a priori assessment.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19990042410&hterms=Earth+core&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D10%26Ntt%3DEarth%2Bcore','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19990042410&hterms=Earth+core&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D10%26Ntt%3DEarth%2Bcore"><span>The Topographic Torque on a Bounding Surface of a Rotating Gravitating <span class="hlt">Fluid</span> and the Excitation by <span class="hlt">Core</span> Motions of Decadal Fluctuations in the Earth's Rotation</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Hide, Raymond</p> <p>1995-01-01</p> <p>General expressions (with potential applications in several areas of geophysical <span class="hlt">fluid</span> dynamics) are derived for all three components of the contribution made by the geostrophic part of the pressure field associated with flow in a rotating gravitating <span class="hlt">fluid</span> to the topographic torque exerted by the <span class="hlt">fluid</span> on a rigid impermeable bounding surface of any shape. When applied to the Earth's liquid metallic <span class="hlt">core</span>, which is bounded by nearly spherical surfaces and can be divided into two main regions, the "torosphere" and "polosphere," the expressions reduce to formulae given previously by the author, thereby providing further support for his work and that of others on the role of topographic coupling at the <span class="hlt">core</span>-mantle boundary in the excitation by <span class="hlt">core</span> motions of Earth rotation fluctuations on decadal time scales. They also show that recent criticisms of that work are vitiated by mathematical and physical errors. Contrary to these criticisms, the author's scheme for exploiting Earth rotation and other geophysical data (either real or simulated in computer models) in quantitative studies of the topography of the <span class="hlt">core</span>-mantle boundary (CMB) by intercomparing various models of (a) motions in the <span class="hlt">core</span> based on geomagnetic secular variation data and (b) CMB topography based on seismological and gravity data has a sound theoretical basis. The practical scope of the scheme is of course limited by the accuracy of real data, but this is a matter for investigation, not a priori assessment.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016Tectp.666..260D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016Tectp.666..260D"><span><span class="hlt">Fluid</span>-rock interactions in seismic faults: Implications from the structures and mineralogical and geochemical compositions of drilling <span class="hlt">cores</span> from the rupture of the 2008 Wenchuan earthquake, China</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Duan, Qingbao; Yang, Xiaosong; Ma, Shengli; Chen, Jianye; Chen, Jinyu</p> <p>2016-01-01</p> <p>We describe the structural features and mineralogical and geochemical compositions of the fault rocks recovered from boreholes at the Golden River site on the Yingxiu-Beichuan fault, which activated and slipped along a 240 km-long main surface rupture zone during the 2008 Wenchuan earthquake. The fault, which accommodated co-seismic slip, cuts granitic rocks from the Pengguan complex, in which this earthquake most likely nucleated. Fault rocks, including cohesive cataclasite, unconsolidated breccia and three fault gouges with distinct colors, were identified from the drilling <span class="hlt">cores</span>. On-going uplift and erosion in the area means that the fault rocks, formed at different depth, were exhumed to the shallow surface during the uplift history of the Longmenshan fault zone. A clear change from fracturing and comminution in the cataclasites and breccia to more pervasive shear/formation of fine grained materials in the gouges has been observed. The gouges are distinct and have accommodated significant displacement in multiple increments of shear. Furthermore, fault rocks recovered from the boreholes display numerous features indicative of <span class="hlt">fluid</span> infiltration and <span class="hlt">fluid</span>-rock interaction. Toward the fault <span class="hlt">core</span>, clay minerals have replaced feldspars. The element enrichment/depletion patterns of the fault rocks show general <span class="hlt">fluid</span> infiltration trends, such as 1) mobile elements are generally depleted in the fault rocks, 2) the microstructural, mineralogical and geochemical results of the fault rocks consistently indicate that pervasive <span class="hlt">fluid</span> infiltration and <span class="hlt">fluid</span>-rock interactions altered feldspars and mafic minerals to clay minerals. The <span class="hlt">fluid</span> was Mg2 +- and Fe2 +-rich, facilitating formation of chlorite. Isocon analyses further reveal that a large rock volume has been lost, which is attributed to the removal of mobile elements associated with <span class="hlt">fluid</span> infiltration and perhaps enhanced by pressure solution. These results reflect the accumulated effects of cataclasis and <span class="hlt">fluid</span></p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27774539','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27774539"><span>One-dimensional Gaussian-<span class="hlt">core</span> <span class="hlt">fluid</span>: ordering and crossover from normal diffusion to single-file dynamics.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Herrera-Velarde, Salvador; Pérez-Angel, Gabriel; Castañeda-Priego, Ramón</p> <p>2016-11-09</p> <p>The peculiarity of a bounded pair potential in combination with strong confinement brings some quite interesting new phenomenology in the structure and dynamics of one-dimensional colloidal systems. Such behaviour is atypical in comparison with colloidal systems interacting with potentials that diverge at the origin. In this contribution, by means of molecular dynamics simulations, a confined one-dimensional model of particles interacting via a Gaussian-<span class="hlt">core</span> pair potential is studied. We explore the effects of confinement, density and temperature on the structural and dynamical correlation functions. Our findings indicate that the static and dynamic liquid-state anomalies already reported in open systems are also present in this 1D model system. Using the radial distribution function and the static structure factor to characterise the spatial ordering, it is observed that the system remains <span class="hlt">fluid</span> at all densities. However, when the reduced temperature is above 0.03, it displays typical features of a liquid regime, i.e., there exist short-range spatial correlations among particles. In contrast, at lower temperatures and densities, where the particle-particle interaction dominates, the system behaves structurally and dynamically similar to a hard-<span class="hlt">core</span> repulsive system. In such a region, interestingly, there is a crossover from a liquid to a solid-like regime. At any given temperature, the system undergoes a sort of reentrant structural behaviour as the density increases. At either high densities or temperatures, particle correlations vanish, thus, the system exhibits structural and dynamical properties similar to those of an ideal gas. To examine a possible correlation between the structural anomalies and the diffusive behaviour, the mean-square displacement and the self-intermediate scattering function are also computed. From these observables, we establish the thermodynamic phase-space points where the dynamical behaviour is non-monotonic. In conjunction with the</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2001GeoJI.147..263B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2001GeoJI.147..263B"><span>Influence of open and sealed fractures on <span class="hlt">fluid</span> flow and water saturation in sandstone <span class="hlt">cores</span> using Magnetic Resonance Imaging</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Baraka-Lokmane, S.; Teutsch, G.; Main, I. G.</p> <p>2001-11-01</p> <p>We use Magnetic Resonance Imaging (MRI) to image the imbibition of water by capillary action in a right-cylindrical sample of a porous sedimentary rock with low iron content. In the method some 55 repeat images are taken over a period of approximately two hours, covering five vertical sections. The evolution of the water flood front and the degree of water saturation can be observed by examining snapshots of proton density. The results clearly show (a) the development of a rising wetting front in the rock matrix (b) preferential flow along open fractures observed on the <span class="hlt">core</span> surface, and (c) reduced flow associated with sealed fractures. The inferred location, orientation and connectivity of conducting and sealing fractures are confirmed by impregnating the sample after the test with an appropriate low-viscosity setting resin and taking serial thin sections in destructive mode. The results validate the utility of MRI as a non-destructive analytical tool for visualizing the distribution of water inside fractured porous media with low iron content. The technique identifies paths of high and low permeability in the sample, and quantifies the fracture location, orientation, and connectivity in sedimentary rocks. Preferential <span class="hlt">fluid</span> flow in open fractures during capillary imbibition implies that the fractures are more water-wet than the clasts within the matrix. This may be due to due to differences in the age, morphology and mineral structure on the surface of the pores and the fractures.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28893692','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28893692"><span>Formation of mannitol <span class="hlt">core</span> microparticles for sustained release with lipid coating in a mini <span class="hlt">fluid</span> bed system.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wang, Bifeng; Friess, Wolfgang</p> <p>2017-09-08</p> <p>The goal of this study was to prepare sustained release microparticles for methyl blue and aspartame as sparingly and freely water-soluble model drugs by lipid film coating in a Mini-Glatt <span class="hlt">fluid</span> bed, and to assess the effect of coating load of two of lipids, hard fat and glyceryl stearate, on the release rates. 30g drug-loaded mannitol carrier microparticles with average diameter of 500 or 300μm were coated with 5g, 10g, 20g and 30g lipids, respectively. The model drugs were completely released in vitro through pores which mainly resulted from dissolution of the polyol <span class="hlt">core</span> beads. The release of methyl blue from microparticles based on 500μm carrier beads extended up to 25days, while aspartame release from microparticles formed from 300μm carrier beads was extended to 7days. Although glyceryl stearate exhibits higher wettability, burst and release rates were similar for the two lipid materials. Polymorphic transformation of the hart fat was observed upon release. The lipid-coated microparticles produced with 500μm carrier beads showed slightly lower burst release compared to the microparticles produced with 300μm carrier beads as they carried relatively thicker lipid layer based on an equivalent lipid to mannitol ratio. Aspartame microparticles showed a much faster release than methyl blue due to the higher water-solubility of aspartame. Copyright © 2017. Published by Elsevier B.V.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19820015697','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19820015697"><span>Investigation of geomagnetic field forecasting and <span class="hlt">fluid</span> dynamics of the <span class="hlt">core</span>. [determination of the bundary between the <span class="hlt">core</span> and mantle of the Earth</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Benton, E. R. (Principal Investigator)</p> <p>1981-01-01</p> <p>Progress in the use of MAGSAT data to confirm that the radius of the Earth's <span class="hlt">core</span>-mantle boundary can be accurately determined magnetically is reported. The MAGSAT data was used in conjunction with a high quality manfield model for epoch 1965. The unsigned flux linking the <span class="hlt">core</span> and mantle of the Earth is considered to be a legitimate invariant for a span of time. The value from MAGSAT of this constant is 16.056 GWb (gigawebers).</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28263835','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28263835"><span>Plant-expressed Hepatitis B <span class="hlt">core</span> antigen virus-like particles: Characterization and investigation of their stability in simulated and pig gastro-intestinal <span class="hlt">fluids</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Berardi, Alberto; Lomonossoff, George P; Evans, David J; Barker, Susan A</p> <p>2017-04-30</p> <p>Virus-like particles (VLPs) are potential oral vaccine candidates, as their highly compact structure may allow them to withstand the harsh conditions of the gastro-intestinal (GI) environment. Hepatitis B <span class="hlt">core</span> antigen (HBcAg) is an immunogenic protein that assembles into 30 or 34nm diameter VLPs. Here, the stabilities of both the HBcAg polypeptide itself and the three-dimensional structure of the VLPs upon exposure to in vitro and ex vivo simulated gastric and intestinal <span class="hlt">fluids</span> were investigated. Plant-expressed HBcAg VLPs were efficiently purified by sucrose density gradient and characterized. The purified VLPs did not show major chemical or physical instability upon exposure to the low pH conditions typically found in the stomach; however, they completely agglomerated upon acidification and subsequent pH neutralization. The HBcAg polypeptide was highly digested upon exposure to pepsin in simulated gastric <span class="hlt">fluids</span>. HBcAg appeared more stable in both simulated and ex vivo intestinal <span class="hlt">fluids</span>, where despite a partial digestion of the HBcAg polypeptide, the VLPs maintained their most immunogenic epitopes and their particulate conformation. These results suggest that HBcAg VLPs are likely to be unstable in gastric <span class="hlt">fluids</span>, yet if the gastric instability could be bypassed, they could maintain their particulate structure and immunogenicity in intestinal <span class="hlt">fluids</span>. Copyright © 2017 Elsevier B.V. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015JVGR..302...47F','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015JVGR..302...47F"><span>Evolution of <span class="hlt">fluid</span>-rock interaction in the Reykjanes geothermal system, Iceland: Evidence from Iceland Deep Drilling Project <span class="hlt">core</span> RN-17B</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Fowler, Andrew P. G.; Zierenberg, Robert A.; Schiffman, Peter; Marks, Naomi; Friðleifsson, Guðmundur Ómar</p> <p>2015-09-01</p> <p>We describe the lithology and present spatially resolved geochemical analyses of samples from the hydrothermally altered Iceland Deep Drilling Project (IDDP) drill <span class="hlt">core</span> RN-17B. The 9.3 m long RN-17B <span class="hlt">core</span> was collected from the seawater-dominated Reykjanes geothermal system, located on the Reykjanes Peninsula, Iceland. The nature of <span class="hlt">fluids</span> and the location of the Reykjanes geothermal system make it a useful analog for seafloor hydrothermal processes, although there are important differences. The recovery of drill <span class="hlt">core</span> from the Reykjanes geothermal system, as opposed to drill cuttings, has provided the opportunity to investigate evolving geothermal conditions by utilizing in-situ geochemical techniques in the context of observed paragenetic and spatial relationships of alteration minerals. The RN-17B <span class="hlt">core</span> was returned from a vertical depth of ~ 2560 m and an in-situ temperature of ~ 345 °C. The primary lithologies are basaltic in composition and include hyaloclastite breccia, fine-grained volcanic sandstone, lithic breccia, and crystalline basalt. Primary igneous phases have been entirely pseudomorphed by calcic plagioclase + magnesium hornblende + chlorite + titanite + albitized plagioclase + vein epidote and sulfides. Despite the extensive hydrothermal metasomatism, original textures including hyaloclastite glass shards, lithic clasts, chilled margins, and shell-fragment molds are superbly preserved. Multi-collector LA-ICP-MS strontium isotope ratio (87Sr/86Sr) measurements of vein epidote from the <span class="hlt">core</span> are consistent with seawater as the dominant recharge <span class="hlt">fluid</span>. Epidote-hosted <span class="hlt">fluid</span> inclusion homogenization temperature and freezing point depression measurements suggest that the RN-17B <span class="hlt">core</span> records cooling through the two-phase boundary for seawater over time to current in-situ measured temperatures. Electron microprobe analyses of hydrothermal hornblende and hydrothermal plagioclase confirm that while alteration is of amphibolite-grade, it is in disequilibrium</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011AGUFM.T33J..06M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011AGUFM.T33J..06M"><span>A poroplastic model of mature fault <span class="hlt">cores</span> with biphasic pore <span class="hlt">fluids</span> to investigate the role of gas on the onset of fault failure</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Maury, V.; Fitzenz, D. D.; Piau, J.</p> <p>2011-12-01</p> <p>A poroplastic model of mature fault <span class="hlt">cores</span> with biphasic pore <span class="hlt">fluids</span> to investigate the role of gas on the onset of fault failure The effects of a rapid access of a fault to a source of overpressured <span class="hlt">fluids</span> on effective stress and failure criterion have been recognized for a long time (Quattrocchi 1999), resulting in a decrease of the effective stress. We concentrate here on the case of the appearance/disappearance of gas in the pore <span class="hlt">fluid</span>, and its effects on the loading path (Maury et al., 2011). Indeed, gas can appear continuously in a fault zone through dilatant deformation of the zones adjacent to the <span class="hlt">core</span> fault (Kuo, 2006 ), due to <span class="hlt">fluid</span> depressurization and degassing. Other source of gas e.g., mantle degasing (Miller et al, 2004), devolitization of coal or other organic matter during frictional sliding (O'Hara et al, 2006), may be remote, and diffuse through a fracture network, or local. Gas in a fault <span class="hlt">core</span> reduces the Skempton's coefficient to almost 0, the total stress increase during tectonic loading induces a larger increase in effective stress than when pore <span class="hlt">fluid</span> is fully liquid saturated, thus changing dramatically the loading path for that fault. Not only is failure delayed, but the shear stress at failure increases significantly. Before gas disappearance, the fault might not be critically stressed. However, a subsequent disappearance of gas may lead to failure for small increments of normal and shear stress: apparently strong faults can fail in response to small stress changes. Dilatant failure envelopes are often assumed for localized faults, whereas end-cap envelopes are usually used in association with compaction bands. Here we investigate a poroplastic model for mature fault <span class="hlt">cores</span> acknowledging that these can be dilatant/contractant according to the state of stress at the plasticity criterion contact. We therefore use a Cam-Clay model as a first approximation. This model enables us to monitor the stability behavior and compute the jumps in stress</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1999MolPh..97..597G','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1999MolPh..97..597G"><span>RESEARCH NOTE On the hard <span class="hlt">core</span> Yukawa <span class="hlt">fluid</span> of variable range: Monte Carlo simulations and test of the MSA equation of state</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Garnett, Ernesto; Mier-Y-Teran, Luis; Del Rio, Fernando</p> <p></p> <p>A recently proposed analytical equation of state (EOS) for the hard <span class="hlt">core</span> Yukawa <span class="hlt">fluid</span> is tested against results of Monte Carlo (MC) simulations. The Duh and Mier-y-Teran (DMT) equation of state is based on the mean-spherical approximation (MSA) and gives the free energy of the <span class="hlt">fluid</span> for arbitrary ranges of the Yukawa interaction. The pressure EOS is compared with results of new NV T MC simulations for shorter ranges of the potential and with the solution of the MSA. In all cases, the DMT EOS reproduces very accurately the MSA results obtained via the energy route. For the longer Yukawa ranges, the DMT EOS agrees well with the MC results but systematic deviations, due to the MSA itself, are noticeable for shorter ranges.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/20817962','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/20817962"><span>The use of heat transfer <span class="hlt">fluids</span> in the synthesis of high-quality CdSe quantum dots, <span class="hlt">core</span>/shell quantum dots, and quantum rods.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Asokan, Subashini; Krueger, Karl M; Alkhawaldeh, Ammar; Carreon, Alessandra R; Mu, Zuze; Colvin, Vicki L; Mantzaris, Nikos V; Wong, Michael S</p> <p>2005-10-01</p> <p>Fluorescent semiconductor nanoparticles, or quantum dots, have potential uses as an optical material, in which the optoelectronic properties can be tuned precisely by particle size. Advances in chemical synthesis have led to improvements in size and shape control, cost, and safety. A limiting step in large-scale production is identified to be the raw materials cost, in which a common synthesis solvent, octadecene, accounts for most of the materials cost for a batch of CdSe quantum dots. Thus, less expensive solvents are needed. In this paper, we identify heat transfer <span class="hlt">fluids</span>, a class of organic liquids commonly used in chemical process industries to transport heat between unit operations, as alternative solvents for quantum dot synthesis. We specifically show that two heat transfer <span class="hlt">fluids</span> can be used successfully in the synthesis of CdSe quantum dots with uniform particle sizes. We show that the synthesis chemistry for CdSe/CdS <span class="hlt">core</span>/shell quantum dots and CdSe quantum rods can also be performed in heat transfer <span class="hlt">fluids</span>. With the aid of a population balance model, we interpret the effect of different HT <span class="hlt">fluids</span> on QD growth kinetics in terms of solvent effects, i.e., solvent viscosity, CdSe bulk solubility in the solvent, and surface free energy.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/14754208','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/14754208"><span>Simple analytic equations of state for hard-<span class="hlt">core</span> single and double Yukawa <span class="hlt">fluids</span> and mixtures based on second-order Barker-Henderson perturbation theory.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Jiuxun, Sun</p> <p>2003-12-01</p> <p>A simple analytic expression with high precision for the radial distribution function of hard spheres is proposed. The form of the expression has been carefully selected to combine the well-known Camahan-Starling equation of state in it and satisfy the limit condition at low density, its simplicity and precision is superior to the well-known Percus-Yevick expression. The coefficients contained in the expression have been determined by fitting the Monte Carlo data for the first coordination shell, and by fitting both the Monte Carlo data and the numerical results of the Percus-Yevick expression for the second coordination shell. The expression has been applied to develop simple analytic equations of state for the hard-<span class="hlt">core</span> single, double Yukawa <span class="hlt">fluids</span>, and the hard-<span class="hlt">core</span> Yukawa mixtures. The comparisons show that the agreement of our model with the computer simulation data is slightly better than the mean spherical approximation and other analytic models.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015PApGe.172.1053B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015PApGe.172.1053B"><span>Composition, Alteration, and Texture of Fault-Related Rocks from Safod <span class="hlt">Core</span> and Surface Outcrop Analogs: Evidence for Deformation Processes and <span class="hlt">Fluid</span>-Rock Interactions</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Bradbury, Kelly K.; Davis, Colter R.; Shervais, John W.; Janecke, Susanne U.; Evans, James P.</p> <p>2015-05-01</p> <p>We examine the fine-scale variations in mineralogical composition, geochemical alteration, and texture of the fault-related rocks from the Phase 3 whole-rock <span class="hlt">core</span> sampled between 3,187.4 and 3,301.4 m measured depth within the San Andreas Fault Observatory at Depth (SAFOD) borehole near Parkfield, California. This work provides insight into the physical and chemical properties, structural architecture, and <span class="hlt">fluid</span>-rock interactions associated with the actively deforming traces of the San Andreas Fault zone at depth. Exhumed outcrops within the SAF system comprised of serpentinite-bearing protolith are examined for comparison at San Simeon, Goat Rock State Park, and Nelson Creek, California. In the Phase 3 SAFOD drillcore samples, the fault-related rocks consist of multiple juxtaposed lenses of sheared, foliated siltstone and shale with block-in-matrix fabric, black cataclasite to ultracataclasite, and sheared serpentinite-bearing, finely foliated fault gouge. Meters-wide zones of sheared rock and fault gouge correlate to the sites of active borehole casing deformation and are characterized by scaly clay fabric with multiple discrete slip surfaces or anastomosing shear zones that surround conglobulated or rounded clasts of compacted clay and/or serpentinite. The fine gouge matrix is composed of Mg-rich clays and serpentine minerals (saponite ± palygorskite, and lizardite ± chrysotile). Whole-rock geochemistry data show increases in Fe-, Mg-, Ni-, and Cr-oxides and hydroxides, Fe-sulfides, and C-rich material, with a total organic content of >1 % locally in the fault-related rocks. The faults sampled in the field are composed of meters-thick zones of cohesive to non-cohesive, serpentinite-bearing foliated clay gouge and black fine-grained fault rock derived from sheared Franciscan Formation or serpentinized Coast Range Ophiolite. X-ray diffraction of outcrop samples shows that the foliated clay gouge is composed primarily of saponite and serpentinite, with localized</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015AGUFMPP21A2219S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015AGUFMPP21A2219S"><span>Cryogenic brines as a diagenetic <span class="hlt">fluid</span>: using clumped isotopes to reconstruct the cementation history of sediments in the ANDRILL 2A <span class="hlt">core</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Staudigel, P. T.; Dunham, D.; Fielding, C. R.; Frank, T. D.; Swart, P. K.</p> <p>2015-12-01</p> <p>The ANDRILL 2A <span class="hlt">core</span> contains a succession of Neogene glaciomarine deposits, cemented by up to 20 wt% carbonate. Isotopic analysis of the cements yielded extremely negative d18O values, indicating either formation from isotopically negative <span class="hlt">fluids</span> or at extremely high temperature. In outcrop, such values could be interpreted as being the result of meteoric diagenesis, but the lack of any exposure horizons in the <span class="hlt">core</span> precludes such an interpretation. A previous study of the pore <span class="hlt">fluids</span> described a brine below 200m, with an extremely negative δ18O value (c. -10‰), probably formed by batch-freezing seawater on the continental margin. The present study integrates ∆47­ values of the cements with traditional approaches to further assess the nature of diagenetic <span class="hlt">fluids</span> and processes. Isotopic data suggest three sources of carbonate: marine, methane reducing, and the aforementioned brines. Marine carbonate indicates δ13C and water δ18O within the range typical of seawater (c. -1‰), whereas the cryogenic brines show more negative values. A few samples exhibited extremely low δ13C values, the lowest below -25‰; the only feasible source for these cements would be the oxidation of methane. The shallow cements' signatures diminish with depth as cryogenic brines begin to dominate the isotopic signal. Biogenic materials show an increased influence of this brine at depth, the deepest buried shells are isotopically indistinguishable from adjacent cements. These analyses show that these cryogenic brines play a major role in the diagenetic history of this site. Clumped isotopic results support previous interpretations using traditional methods, which have identified cryogenic brine as a major cementing agent in the subsurface of Southern McMurdo Sound. Because cryogenic brines have likely formed throughout Earth history, results have the potential to change the way diagenesis is evaluated in sedimentary successions that formed in polar environments.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://pubs.er.usgs.gov/publication/70035576','USGSPUBS'); return false;" href="http://pubs.er.usgs.gov/publication/70035576"><span>Polar organic compounds in pore waters of the Chesapeake Bay impact structure, Eyreville <span class="hlt">core</span> hole: Character of the dissolved organic carbon and comparison with drilling <span class="hlt">fluids</span></span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Rostad, C.E.; Sanford, W.E.</p> <p>2009-01-01</p> <p>Pore waters from the Chesapeake Bay impact structure <span class="hlt">cores</span> recovered at Eyreville Farm, Northampton County, Virginia, were analyzed to characterize the dissolved organic carbon. After squeezing or centrifuging, a small volume of pore water, 100 ??L, was taken for analysis by electrospray ionization-mass spectrometry. Porewater samples were analyzed directly without filtration or fractionation, in positive and negative mode, for polar organic compounds. Spectra in both modes were dominated by low-molecular-weight ions. Negative mode had clusters of ions differing by -60 daltons, possibly due to increasing concentrations of inorganic salts. The numberaverage molecular weight and weight-average molecular weight values for the pore waters from the Chesapeake Bay impact structure are higher than those reported for other aquatic sources of natural dissolved organic carbon as determined by electrospray ionization-mass spectrometry. In order to address the question of whether drilling mud <span class="hlt">fluids</span> may have contaminated the pore waters during sample collection, spectra from the pore waters were compared to spectra from drilling mud <span class="hlt">fluids</span>. Ions indicative of drilling mud <span class="hlt">fluids</span> were not found in spectra from the pore waters, indicating there was no detectable contamination, and highlighting the usefulness of this analytical technique for detecting potential contamination during sample collection. ?? 2009 The Geological Society of America.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li class="active"><span>6</span></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_6 --> <div id="page_7" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li class="active"><span>7</span></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="121"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2004PhDT.........1R','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2004PhDT.........1R"><span>Analysis of <span class="hlt">fluid</span> instabilities in <span class="hlt">core</span> collapse supernova progenitors by a semi-analytical methodology and by two dimensional radiation-hydrodynamical simulations</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Raley, Elizabeth</p> <p>2004-12-01</p> <p>We have performed an analysis of <span class="hlt">fluid</span> instabilities below the neutrinospheres of the collapsed <span class="hlt">cores</span> of supernova progenitors using a methodology introduced by Bruenn and Dineva [28, 29, 31]. In an extensive survey we found that the rate of lepton diffusion always exceeds the rate of thermal diffusion and as a result we do not anywhere see the neutron finger instability as described by the Livermore group [16, 17]. A new instability, lepto-entropy fingers, extending from a radius of 10 15 km out to the vicinity of the neutrinosphere, driven by the cross-response functions (i.e. the dependence of lepton transport on entropy perturbations and vice versa) was discovered. This instability has a maximum growth rate of the order of 100 s-1 with a scale of approximately 1/20 the distance of a perturbed <span class="hlt">fluid</span> element from the <span class="hlt">core</span> center [18]. This instability has probably already been seen in some multi-dimensional <span class="hlt">core</span> collapse calculations. To test our results predicting the presence of doubly diffusive instabilities below the neutrinosphere of a proto-supernova, we have performed two dimensional hydrodynamic simulations with radial ray neutrino transport. This entailed rewriting RadHyd, which is the merger of EVH-1 hydrodynamics and MGFLD neutrino transport developed by Bruenn and DiNisco [43], for two dimensions. In particular, hydrodynamic evolution along angular arrays was included, as was MPI message passing capabilities, in order to utilize massively parallel computer platform such as FAU's BOCA4 Beowulf cluster. This work was partially funded by a grant from the DOE Office of Science, Scientific Discovery through Advanced Computing Program.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19810028553&hterms=nusselt+number&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D10%26Ntt%3Dnusselt%2Bnumber','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19810028553&hterms=nusselt+number&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D10%26Ntt%3Dnusselt%2Bnumber"><span>Thermal convection of an internally heated infinite Prandtl number <span class="hlt">fluid</span> in a spherical shell. [earth <span class="hlt">core</span>-mantle-surface model</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Schubert, G.; Zebib, A.</p> <p>1980-01-01</p> <p>A Galerkin technique is used to study the finite-amplitude axisymmetric steady convective motions of an infinite Prandtl number Boussinesq <span class="hlt">fluid</span> in a spherical shell. Two types of heating are considered: in one case, convection is driven both by internal heat sources in the <span class="hlt">fluid</span> and by an externally imposed temperature drop across the shell boundaries; in the other case, only internal heat sources drive convection and the lower boundary of the shell is adiabatic. Two distinct classes of axisymmetric steady states are found to be possible: states characterized by temperature and radial velocity fields that are symmetric about an equatorial plane; and a class of solutions that does not possess any symmetry properties about the equatorial plane.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28210959','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28210959"><span>Glass transition in hard-<span class="hlt">core</span> <span class="hlt">fluids</span> and beyond, using an effective static structure in the mode coupling theory.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Amokrane, S; Tchangnwa Nya, F; Ndjaka, J M</p> <p>2017-02-01</p> <p>The dynamical arrest in classical <span class="hlt">fluids</span> is studied using a simple modification of the mode coupling theory (MCT) aimed at correcting its overestimation of the tendency to glass formation while preserving its overall structure. As in previous attempts, the modification is based on the idea of tempering the static pair correlations used as input. It is implemented in this work by computing the static structure at a different state point than the one used to solve the MCT equation for the intermediate scattering function, using the pure hard-sphere glass for calibration. The location of the glass transition predicted from this modification is found to agree with simulations data for a variety of systems --pure <span class="hlt">fluids</span> and mixtures with either purely repulsive interaction potentials or ones with attractive contributions. Besides improving the predictions in the long-time limit, and so reducing the non-ergodicity domain, the same modification works as well for the time-dependent correlators.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19810028553&hterms=Earth+core&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D50%26Ntt%3DEarth%2Bcore','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19810028553&hterms=Earth+core&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D50%26Ntt%3DEarth%2Bcore"><span>Thermal convection of an internally heated infinite Prandtl number <span class="hlt">fluid</span> in a spherical shell. [earth <span class="hlt">core</span>-mantle-surface model</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Schubert, G.; Zebib, A.</p> <p>1980-01-01</p> <p>A Galerkin technique is used to study the finite-amplitude axisymmetric steady convective motions of an infinite Prandtl number Boussinesq <span class="hlt">fluid</span> in a spherical shell. Two types of heating are considered: in one case, convection is driven both by internal heat sources in the <span class="hlt">fluid</span> and by an externally imposed temperature drop across the shell boundaries; in the other case, only internal heat sources drive convection and the lower boundary of the shell is adiabatic. Two distinct classes of axisymmetric steady states are found to be possible: states characterized by temperature and radial velocity fields that are symmetric about an equatorial plane; and a class of solutions that does not possess any symmetry properties about the equatorial plane.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012IJCFD..26..193D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012IJCFD..26..193D"><span>A heterogeneous system based on GPU and multi-<span class="hlt">core</span> CPU for real-time <span class="hlt">fluid</span> and rigid body simulation</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>da Silva Junior, José Ricardo; Gonzalez Clua, Esteban W.; Montenegro, Anselmo; Lage, Marcos; Dreux, Marcelo de Andrade; Joselli, Mark; Pagliosa, Paulo A.; Kuryla, Christine Lucille</p> <p>2012-03-01</p> <p>Computational <span class="hlt">fluid</span> dynamics in simulation has become an important field not only for physics and engineering areas but also for simulation, computer graphics, virtual reality and even video game development. Many efficient models have been developed over the years, but when many contact interactions must be processed, most models present difficulties or cannot achieve real-time results when executed. The advent of parallel computing has enabled the development of many strategies for accelerating the simulations. Our work proposes a new system which uses some successful algorithms already proposed, as well as a data structure organisation based on a heterogeneous architecture using CPUs and GPUs, in order to process the simulation of the interaction of <span class="hlt">fluids</span> and rigid bodies. This successfully results in a two-way interaction between them and their surrounding objects. As far as we know, this is the first work that presents a computational collaborative environment which makes use of two different paradigms of hardware architecture for this specific kind of problem. Since our method achieves real-time results, it is suitable for virtual reality, simulation and video game <span class="hlt">fluid</span> simulation problems.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011AGUFM.T43C2339J','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011AGUFM.T43C2339J"><span>Effects of <span class="hlt">fluids</span> on faulting within active fault zones - evidence from drill <span class="hlt">core</span> samples recovered during the San Andreas Fault Observatory at Depth (SAFOD) drilling project</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Janssen, C.; Wirth, R.; Kienast, M.; Morales, L. G.; Rybacki, E.; Wenk, H.; Dresen, G. H.</p> <p>2011-12-01</p> <p>Low temperature microstructures observed in samples from SAFOD drill <span class="hlt">cores</span> indicate <span class="hlt">fluid</span>-related deformation and chemical reactions occurring simultaneously and interacting with each other. Transmission Electron Microscopy (TEM) observations, document open pores that formed in-situ during or after deformation. In TEM images, many pores with high aspect ratio appear to be unconnected. They were possibly filled with formation water and/or hydrothermal <span class="hlt">fluids</span> suggesting that elevated pore <span class="hlt">fluid</span> pressure exist in the fault gouge, preventing pore collapse. The chemical influence of <span class="hlt">fluids</span> on mineralogical alteration and geomechanical processes in fault rocks is visible in pronounced dissolution-precipitation processes (stylolites, solution seams) as well as in the formation of new phases. Detrital quartz and feldspar grains are partially dissolved and replaced by authigenic illite-smectite (I-S) mixed-layer clay minerals. TEM imaging of these grains reveals that the alteration processes initiated within pores and small intra-grain fissures. In few samples syntectonic <span class="hlt">fluid</span>-assisted overgrowth of chlorite-rich films on slickensides partly replaced sedimentary quartz grains. Quartz and feldspar grains are partially dissolved with sutured boundaries. Newly-formed phyllosilicates are illite-smectite phases, Mg-rich smectites and chlorite minerals. They are very fine-grained (down to 20 nm) and nucleate at grain surfaces (interfaces), which in many cases are pore or fracture walls. These relatively straight or curved crystals grow into open pore spaces and fractures. They are arranged in a card-house fabric with open pore spaces between the flakes. Locally, clay flakes are bent, folded or show sigmoidal shapes indicating that they were involved in faulting. The clay particles do not show a preferred shape orientation. The predominantly random orientation distribution of the clay minerals was confirmed by x-ray synchrotron texture analysis. Pole figures show very weak</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19750024044','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19750024044"><span>Preliminary <span class="hlt">core</span>-engine noise abatement experimental results of a <span class="hlt">fluid</span> injection nozzle on a JT-15D turbofan engine</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Cheng, D. Y.; Wang, P.</p> <p>1975-01-01</p> <p>Jet noise, as induced by shear stress, in an jet exhaust is investigated. Experiments were performed on a JT-15D fan jet to verify the inward momentum stress reduction concept. The experiments involved making fan air flow convergently around the high velocity <span class="hlt">core</span> jet with a small angle. Ring airfoils were used as flow separators for the minimization of the thrust loss. Jet exhaust noise reduction of ll db at 30 deg from the jet axis was recorded and 8 db integrated overall noise reduction over a hemisphere was measured with only 4.6% thrust loss, or 152 db/percent thrust loss.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/20441284','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/20441284"><span>Evolution of the liquid-vapor coexistence of the hard-<span class="hlt">core</span> Yukawa <span class="hlt">fluid</span> as a function of the interaction range.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>El Mendoub, E B; Wax, J-F; Jakse, N</p> <p>2010-04-28</p> <p>The present work is devoted to the study of the liquid-vapor coexistence curve of hard-<span class="hlt">core</span> Yukawa <span class="hlt">fluids</span> for range parameter lambda, going from 0.5 to 7 by means of an integral equation approach. Both binodal and spinodal lines are computed and compared to available simulation data, and the integral equation used appears to be accurate. We also compare two methods for determining the coordinates of the critical point. The first one, using the rectilinear diameter law, appears to be less accurate than the second one based on the heat capacity at constant volume. It is found that the critical temperature decreases as the range of the interactions increases and that the liquid-vapor coexistence disappears for lambda greater than 6.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/137611','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/137611"><span>Horizontal <span class="hlt">coring</span> using air as the circulating <span class="hlt">fluid</span>: Some prototype studies conducted in G Tunnel at the Nevada Test Site for the Yucca Mountain Project</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Chornack, M.P.; French, C.A.</p> <p>1989-12-31</p> <p>Horizontal <span class="hlt">coring</span> using air as the circulating <span class="hlt">fluid</span> has been conducted in the G Tunnel Underground Facility (GTUF) at the Nevada Test Site. This work is part of the prototype investigations of hydrogeology for the Yucca Mountain Project. The work is being conducted to develop methods and procedures that will be used at the Department of Energy`s Yucca Mountain Site, a candidate site for the nation`s first high-level nuclear waste repository, during the site characterization phase of the investigations. The United States Geological Survey (USGS) is conducting this prototype testing under the guidance of the Los Alamos National Laboratory (LANL) and in conjunction with Reynolds Electrical & Engineering Company (REECo), the drilling contractor. 7 refs., 8 figs., 5 tabs.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009AGUFM.T53C1600A','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009AGUFM.T53C1600A"><span>K-Ar constraints on <span class="hlt">fluid</span>-rock interaction and dissolution-precipitation events within the actively creeping shear zones from SAFOD <span class="hlt">cores</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Ali, S.; Hemming, S. R.; Torgersen, T.; Fleisher, M. Q.; Cox, S. E.; Stute, M.</p> <p>2009-12-01</p> <p>The San Andreas Fault Observatory at Depth (SAFOD) was drilled to study the physical and chemical processes responsible for faulting and earthquake generation along an active, plate-bounding fault at depth. SAFOD drill <span class="hlt">cores</span> show multiple zones of alteration and deformation due to <span class="hlt">fluid</span>-rock interaction in the fault rocks(Schleicher et al. 2008). In context of <span class="hlt">fluid</span> studies in the SAFZ, noble gas and potassium measurements were performed on solid samples of sedimentary rocks obtained from drill <span class="hlt">cores</span> across the fault (3050-4000m-MD). We used a combination of 40Ar/39Ar and K-Ar methods on crushed samples of mudrock with variable amounts of visible slickensides to constrain the degree of resetting of the K-Ar system across the San Andreas Fault zone. 40Ar/39Ar was analyzed from small fragments (sand sized grains) while K-Ar was measured in crushed bulk rock samples (100-250 mg for Ar, and 5-10 mg for K analyses). The apparent 40Ar/39Ar ages based on single step laser fusion of small fragments corresponding to the detrital component in the coarse fraction, show varying ages ranging from the provenance age to <13Ma. Although more data are needed to make detailed comparisons, the apparent K-Ar ages of bulk samples in the fault zone are biased toward authigenic materials contained in the fine fraction, similar to the 40Ar/39Ar ages reported for mineralogical separates from very fine size fractions of samples obtained from 3065.98m-MD and 3294.89m-MD (Schleicher et al., submitted to Geology). The small samples measured for 40Ar/39Ar show scatter in the apparent ages, generally bracketing the bulk ages. However they are picked from sieved portions of the samples, and it is likely that there may be a loss of the younger (finer) material. Detrital provenance ages appear to be 50-60Ma in the Pacific Plate, and 100Ma in the North American Plate. 40Ar/39Ar ages within the SAFZ, as defined by geophysical logs (3200-3400m MD), are dominated by apparent detrital ages of ˜100Ma</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2002AGUFM.P62A0369Y','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2002AGUFM.P62A0369Y"><span>The Size of Mars' <span class="hlt">Fluid</span> <span class="hlt">Core</span> From Mars k2 Love Number Obtained From Analysis of MGS Doppler Tracking.</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Yoder, C. F.; Konopliv, A. S.; Yuan, D. N.; Standish, E. M.; Folkner, W. M.</p> <p>2002-12-01</p> <p>The solar tidal deformation of Mars, measured by its k2 potential Love number, has been obtained from analysis of MGS radio tracking. The observed k2 =0.164+-0.016 is large enough to rule out a solid iron <span class="hlt">core</span>. The inferred <span class="hlt">core</span> radius Rc (1600km<Rc<1900km) is remarkably independent of interior properties such as temperature, composition (as measured by the molar ratio Mg/(M+Fe)) and crustal thickness, even after correcting for atmospheric thermal tides, mantle anelasticity, spin pole nutations and seasonal changes in shape from ice cap ablation/accretion. One critical model feature is the ability to isolate the second degree and m'th order harmonic components: semidiurnal (m=2), diurnal (m=1) and long period (m=0) and solve for independent k2m parameters. Detection of tides depends on finding reliable, long period signatures since short period changes are too small. A crucial tidal signature is a secular drift in spacecraft orbit inclination related to the sun-synchronous spacecraft orbit and which is seen only in the m=2 tide. In order to minimize the effect of along-track changes on a solution for k22, the drag model solves for a daily coefficient and thus effectively minimizes the influence of the along-track residual signature on this solution parameter. The k21 and k22 coefficients primarily affect the orbit node (k21 has an annual variation) where it is strongly mixed with seasonal changes in Mars' even zonal gravity harmonics (J2, J4). The odd gravity harmonics (J3, J5) are detected through seasonal changes in orbit eccentricity where the influences of tides are weak. The observed J3, J5 amplitudes are consistent with estimates of ice cap mass only if the cap thickness increases with latitude and the south cap is significantly larger than the north cap.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016SolE....7.1109K','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016SolE....7.1109K"><span>Simulating stress-dependent <span class="hlt">fluid</span> flow in a fractured <span class="hlt">core</span> sample using real-time X-ray CT data</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Kling, Tobias; Huo, Da; Schwarz, Jens-Oliver; Enzmann, Frieder; Benson, Sally; Blum, Philipp</p> <p>2016-07-01</p> <p>Various geoscientific applications require a fast prediction of fracture permeability for an optimal workflow. Hence, the objective of the current study is to introduce and validate a practical method to characterize and approximate single flow in fractures under different stress conditions by using a <span class="hlt">core</span>-flooding apparatus, in situ X-ray computed tomography (CT) scans and a finite-volume method solving the Navier-Stokes-Brinkman equations. The permeability of the fractured sandstone sample was measured stepwise during a loading-unloading cycle (0.7 to 22.1 MPa and back) to validate the numerical results. Simultaneously, the pressurized <span class="hlt">core</span> sample was imaged with a medical X-ray CT scanner with a voxel dimension of 0.5 × 0.5 × 1.0 mm3. Fracture geometries were obtained by CT images based on a modification of the simplified missing attenuation (MSMA) approach. Simulation results revealed both qualitative plausibility and a quantitative approximation of the experimentally derived permeabilities. The qualitative results indicate flow channeling along several preferential flow paths with less pronounced tortuosity. Significant changes in permeability can be assigned to temporal and permanent changes within the fracture due to applied stresses. The deviations of the quantitative results appear to be mainly caused by both local underestimation of hydraulic properties due to compositional matrix heterogeneities and the low CT resolution affecting the accurate capturing of sub-grid-scale features. Both affect the proper reproduction of the actual connectivity and therefore also the depiction of the expected permeability hysteresis. Furthermore, the threshold value CTmat (1862.6 HU) depicting the matrix material represents the most sensitive input parameter of the simulations. Small variations of CTmat can cause enormous changes in simulated permeability by up to a factor of 2.6 ± 0.1 and, thus, have to be defined with caution. Nevertheless, comparison with further CT</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011JChPh.134f4904K','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011JChPh.134f4904K"><span>On the importance of thermodynamic self-consistency for calculating clusterlike pair correlations in hard-<span class="hlt">core</span> double Yukawa <span class="hlt">fluids</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Kim, Jung Min; Castañeda-Priego, Ramón; Liu, Yun; Wagner, Norman J.</p> <p>2011-02-01</p> <p>Understanding the mechanisms of clustering in colloids, nanoparticles, and proteins is of significant interest in material science and both chemical and pharmaceutical industries. Recently, using an integral equation theory formalism, Bomont et al. [J. Chem. Phys. 132, 184508 (2010)] studied theoretically the temperature dependence, at a fixed density, of the cluster formation in systems where particles interact with a hard-<span class="hlt">core</span> double Yukawa potential composed of a short-range attraction and a long-range repulsion. In this paper, we provide evidence that the low-q peak in the static structure factor, frequently associated with the formation of clusters, is a common behavior in systems with competing interactions. In particular, we demonstrate that, based on a thermodynamic self-consistency criterion, accurate structural functions are obtained for different choices of closure relations. Moreover, we explore the dependence of the low-q peak on the particle number density, temperature, and potential parameters. Our findings indicate that enforcing thermodynamic self-consistency is the key factor to calculate both thermodynamic properties and static structure factors, including the low-q behavior, for colloidal dispersions with both attractive and repulsive interactions. Additionally, a simple analysis of the mean number of neighboring particles provides a qualitative description of some of the cluster features.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2006GGG.....7.1004B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2006GGG.....7.1004B"><span>Mass transfer and <span class="hlt">fluid</span> flow during detachment faulting and development of an oceanic <span class="hlt">core</span> complex, Atlantis Massif (MAR 30°N)</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Boschi, Chiara; Früh-Green, Gretchen L.; Delacour, AdéLie; Karson, Jeffrey A.; Kelley, Deborah S.</p> <p>2006-01-01</p> <p>The Atlantis Massif (Mid-Atlantic Ridge, 30°N) is an example of an oceanic <span class="hlt">core</span> complex (OCC) exposed by a major fault system. Our integrated field and analytical study of mafic and ultramafic rocks exposed on the south wall of the massif demonstrates the complex interplay of <span class="hlt">fluids</span>, mass transfer, and metamorphism in strain localization associated with the evolution of a major detachment shear zone and development of this OCC. Extensive talc-amphibole-chlorite metasomatism as well as heterogeneous, crystal-plastic to cataclastic deformation characterize a strongly foliated, 100-m-thick zone of detachment faulting. The metasomatic fault rocks are key elements of this OCC and record a deformation and metamorphic history that is distinct from the underlying basement rocks. Talc-rich fault rocks preserve textural and geochemical characteristics of their ultramafic protoliths. Although primary textures and mineral parageneses are commonly obliterated in rocks dominated by amphibole, bulk rock data point to a mafic protolith. Major and trace elements indicate a complex mutual interaction between gabbroic and ultramafic rocks during metasomatism, which together with microstructures suggest localized circulation of oxidizing, Si-Al-Ca-rich <span class="hlt">fluids</span> and mass transfer in high strain deformation zones. This type of flow was distinct from the more pervasive circulation that led to strongly serpentinized domains in the south wall. In contrast, cataclastic microfracturing is associated with a dominantly static metasomatism in less deformed domains, suggesting that a significant amount of metasomatism was controlled by diffuse flow and mass transfer associated with fractures that lack a strong preferred orientation. Distinct differences in lithologies, metamorphic overprinting, and degree of deformation between the south wall and central dome of the Atlantis Massif demonstrate the complex lateral and vertical heterogeneity in composition, alteration, and structure of this OCC.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014PhDT.......142R','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014PhDT.......142R"><span>Structural evolution of the Rio Grande rift: Synchronous exhumation of rift flanks from 20-10 Ma, embryonic <span class="hlt">core</span> complexes, and <span class="hlt">fluid</span>-enhanced Quaternary extension</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Ricketts, Jason William</p> <p></p> <p>The Rio Grande rift in Colorado and New Mexico is one of the well-exposed and well-studied continental rifts in the world. Interest in the rift is driven not only by pure scientific intrigue, but also by a desire and a necessity to quantify earthquake hazards in New Mexico as well as to assess various water related issues throughout the state. These motivating topics have thus far led to the publication of two Geological Society of America Special Publication volumes in 1994 and 2013. This dissertation aims at building on the wealth of previous knowledge about the rift, and is composed of three separate chapters that focus on the structural evolution of the Rio Grande rift at several different time and spatial scales. At the largest scale, apatite (U-Th)/He thermochronologic data suggest synchronous extension along the entire length of the Rio Grande rift in Colorado and New Mexico from 20-10 Ma, which is important for understanding and evaluating possible driving mechanisms which are responsible for the rift. Previous tectonic and magmatic events in western North America were highly influential in the formation of the Rio Grande rift, and the new thermochronologic data suggest that its formation may have been closely linked to foundering and removal of the underlying Farallon Plate. A fundamental result of rift development at these scales is a concentration of strain is some regions of the rift. In these regions of maximum extension, fault networks display a geometry involving both high- and low-angle fault networks. These geometries are similar to the early stages in the development of metamorphic <span class="hlt">core</span> complexes, and thus these regions in the rift link incipient extensional environments to highly extended terranes. At shorter time scales, heterogeneous strain accumulation may be governed in part by <span class="hlt">fluids</span> in fault zones. As an example, along the western edge of the Albuquerque basin, travertine deposits are cut by extensional veins that record anomalously high</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25771760','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25771760"><span>Effect of a new heated and humidified breathing circuit with a <span class="hlt">fluid</span>-warming device on intraoperative <span class="hlt">core</span> temperature: a prospective randomized study.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Kim, Eugene; Lee, Sue-Young; Lim, Young-Jin; Choi, Jung-Yoon; Jeon, Young-Tae; Hwang, Jung-Won; Park, Hee-Pyoung</p> <p>2015-08-01</p> <p>The effect of the Mega Acer kit(@), a new heated and humidified breathing circuit (HHBC) containing a <span class="hlt">fluid</span>-warming device, was investigated on intraoperative <span class="hlt">core</span> temperature (T c). A total of 102 patients undergoing elective craniotomies were randomly divided into three groups based on the breathing circuit used: a conventional breathing circuit (group C, n = 34), a Fisher & Paykel HHBC (group F, n = 34), and the Mega (group M, n = 34). From baseline to the end of the surgery, T c and infusion <span class="hlt">fluid</span> temperature (T f) were recorded at 15-min intervals. If T c became lower than 35.5 °C, a forced-air warmer was used. Baseline temperatures were 36.7 ± 0.3, 36.6 ± 0.2, and 36.6 ± 0.2 °C in groups C, M, and F, respectively. T c at the end of surgery dropped from baseline values by 1.0 ± 0.4, 0.5 ± 0.5, and 0.8 ± 0.5 °C in groups C, M, and F, respectively. From 60 min of post-induction to the end of surgery, T c was higher in group M than group C (p < 0.05). From 105 min of post-induction to the end of surgery, T c was higher in group M than group F (p < 0.05). The number of patients receiving forced-air warmer and total forced-air warmer using time were significantly lower in group M than groups C and F (p < 0.05). T f was higher in group M than groups C and F throughout the study period (31.0 ± 1.0 vs. 23.5 ± 0.5 and 24.0 ± 0.4 °C; p < 0.01). The Mega significantly reduced the drop in intraoperative T c by delivering warm <span class="hlt">fluids</span>, compared with the other breathing circuits tested. Clinicaltrials.gov identifier: NCT01831843.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2010AGUFMGC31C0896S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2010AGUFMGC31C0896S"><span>Physical and Chemical Effects of Two-Phase Brine/Supercritical-CO2 <span class="hlt">Fluid</span> Flow on Clastic Rocks: Real-Time Monitoring and NMR Imaging of Flow-Through <span class="hlt">Core</span> Experiments</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Shaw, C. A.; Vogt, S.; Maneval, J. E.; Brox, T.; Skidmore, M. L.; Codd, S. L.; Seymour, J. D.</p> <p>2010-12-01</p> <p>Sandstone <span class="hlt">core</span> samples were challenged with a supercritical CO2-saturated brine mixture in a laboratory flow-through <span class="hlt">core</span> reactor system over a range of temperatures and brine strengths. <span class="hlt">Cores</span> of quartz arenite from the Berea formation were selected to represent ideal ‘clean’ sandstone These laboratory experiments potentially provide an analog for the acidification of pore <span class="hlt">fluids</span> near the brine/CO2 interface during CO2 flooding of depleted clastic hydrocarbon reservoirs for carbon sequestration. Flow in the reactor was perpendicular to bedding. Initial experiments were run at 50°C and 100°C with brine concentrations of 1g/L and 10g/L (TDS) to test effects of different temperatures and brine compositions. Real-time monitoring of <span class="hlt">fluid</span> pH and conductivity provided a measure of reaction rates. Introduction of supercritical CO2 into the brine-saturated <span class="hlt">cores</span> initiated a reduction in pH accompanied by an increase in conductivity. NMR images of fresh <span class="hlt">cores</span> were compared with images of challenged <span class="hlt">cores</span> using a protocol for pixel-by-pixel comparison to determine the effects on bulk pore volume and geometry. Two types of imaging experiments were conducted: multi-slice spin echo and 3-D spin echo images. Multi-slice experiments had a slice thickness of 1.5 mm and an in-plane resolution of 0.27 mm x 0.27 mm, and 3-D experiments had a resolution of 0.47 mm x 0.55 mm x 0.55mm. Imaging results reflected the observed changes in the physical and chemical structure post-challenge. Two-dimensional relaxation correlation experiments were also conducted to probe the pore sizes, connectivity and <span class="hlt">fluid</span> saturation of the rock <span class="hlt">cores</span> before and after challenging. Chemical analyses and microscopic examination of the challenged <span class="hlt">cores</span> will provide a better understanding of alteration in the <span class="hlt">cores</span> and the changes in the volume, geometry and connectivity of pore space.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1299584','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1299584"><span>Determination of the hydrocarbon <span class="hlt">core</span> structure of <span class="hlt">fluid</span> dioleoylphosphocholine (DOPC) bilayers by x-ray diffraction using specific bromination of the double-bonds: effect of hydration.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Hristova, K; White, S H</p> <p>1998-01-01</p> <p>Changes in the structure of the hydrocarbon <span class="hlt">core</span> (HC) of <span class="hlt">fluid</span> lipid bilayers can reveal how bilayers respond to the partitioning of peptides and other solutes (Jacobs, R. E., and S. H. White. 1989. Biochemistry. 28:3421-3437). The structure of the HC of dioleoylphosphocholine (DOPC) bilayers can be determined from the transbilayer distribution of the double-bonds (Wiener, M. C., and S. H. White. 1992. Biophys. J. 61:434-447). This distribution, representing the time-averaged projection of the double-bond positions onto the bilayer normal (z), can be obtained by means of neutron diffraction and double-bond specific deuteration (Wiener, M. C., G. I. King, and S. H. White. 1991. Biophys. J. 60:568-576). For fully resolved bilayer profiles, a close approximation of the distribution could be obtained by x-ray diffraction and isomorphous bromine labeling at the double-bonds of the DOPC sn-2 acyl chain (Wiener, M. C., and S. H. White. 1991. Biochemistry. 30:6997-7008). We have modified the bromine-labeling approach in a manner that permits determination of the distribution in under-resolved bilayer profiles observed at high water contents. We used this new method to determine the transbilayer distribution of the double-bond bromine labels of DOPC over a hydration range of 5.4 to 16 waters per lipid, which reveals how the HC structure changes with hydration. We found that the transbilayer distributions of the bromines can be described by a pair of Gaussians of 1/e half-width A(Br) located at z = +Z(Br) relative to the bilayer center. For hydrations from 5.4 waters up to 9.4 waters per lipid, Z(Br) decreases from 7.97 +/- 0.27 A to 6.59 +/- 0.15 A, while A(Br) increased from 4.62 +/- 0.62 A to 5.92 +/- 0.37 A, consistent with the expected hydration-induced decrease in HC thickness and increase in area per lipid. After the phosphocholine hydration shell was filled at approximately 12 waters per lipid, we observed a shift in Z(Br) to approximately 7.3 A, indicative of a</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/9591668','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/9591668"><span>Determination of the hydrocarbon <span class="hlt">core</span> structure of <span class="hlt">fluid</span> dioleoylphosphocholine (DOPC) bilayers by x-ray diffraction using specific bromination of the double-bonds: effect of hydration.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Hristova, K; White, S H</p> <p>1998-05-01</p> <p>Changes in the structure of the hydrocarbon <span class="hlt">core</span> (HC) of <span class="hlt">fluid</span> lipid bilayers can reveal how bilayers respond to the partitioning of peptides and other solutes (Jacobs, R. E., and S. H. White. 1989. Biochemistry. 28:3421-3437). The structure of the HC of dioleoylphosphocholine (DOPC) bilayers can be determined from the transbilayer distribution of the double-bonds (Wiener, M. C., and S. H. White. 1992. Biophys. J. 61:434-447). This distribution, representing the time-averaged projection of the double-bond positions onto the bilayer normal (z), can be obtained by means of neutron diffraction and double-bond specific deuteration (Wiener, M. C., G. I. King, and S. H. White. 1991. Biophys. J. 60:568-576). For fully resolved bilayer profiles, a close approximation of the distribution could be obtained by x-ray diffraction and isomorphous bromine labeling at the double-bonds of the DOPC sn-2 acyl chain (Wiener, M. C., and S. H. White. 1991. Biochemistry. 30:6997-7008). We have modified the bromine-labeling approach in a manner that permits determination of the distribution in under-resolved bilayer profiles observed at high water contents. We used this new method to determine the transbilayer distribution of the double-bond bromine labels of DOPC over a hydration range of 5.4 to 16 waters per lipid, which reveals how the HC structure changes with hydration. We found that the transbilayer distributions of the bromines can be described by a pair of Gaussians of 1/e half-width A(Br) located at z = +Z(Br) relative to the bilayer center. For hydrations from 5.4 waters up to 9.4 waters per lipid, Z(Br) decreases from 7.97 +/- 0.27 A to 6.59 +/- 0.15 A, while A(Br) increased from 4.62 +/- 0.62 A to 5.92 +/- 0.37 A, consistent with the expected hydration-induced decrease in HC thickness and increase in area per lipid. After the phosphocholine hydration shell was filled at approximately 12 waters per lipid, we observed a shift in Z(Br) to approximately 7.3 A, indicative of a</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=20040062389&hterms=k2&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D50%26Ntt%3Dk2','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=20040062389&hterms=k2&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D50%26Ntt%3Dk2"><span>Lunar <span class="hlt">Core</span> and Tides</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Williams, J. G.; Boggs, D. H.; Ratcliff, J. T.</p> <p>2004-01-01</p> <p>Variations in rotation and orientation of the Moon are sensitive to solid-body tidal dissipation, dissipation due to relative motion at the <span class="hlt">fluid-core</span>/solid-mantle boundary, and tidal Love number k2 [1,2]. There is weaker sensitivity to flattening of the <span class="hlt">core</span>-mantle boundary (CMB) [2,3,4] and <span class="hlt">fluid</span> <span class="hlt">core</span> moment of inertia [1]. Accurate Lunar Laser Ranging (LLR) measurements of the distance from observatories on the Earth to four retroreflector arrays on the Moon are sensitive to lunar rotation and orientation variations and tidal displacements. Past solutions using the LLR data have given results for dissipation due to solid-body tides and <span class="hlt">fluid</span> <span class="hlt">core</span> [1] plus Love number [1-5]. Detection of CMB flattening, which in the past has been marginal but improving [3,4,5], now seems significant. Direct detection of the <span class="hlt">core</span> moment has not yet been achieved.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li class="active"><span>7</span></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_7 --> <div id="page_8" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li class="active"><span>8</span></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="141"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=20040062389&hterms=tide&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3Dtide','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=20040062389&hterms=tide&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3Dtide"><span>Lunar <span class="hlt">Core</span> and Tides</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Williams, J. G.; Boggs, D. H.; Ratcliff, J. T.</p> <p>2004-01-01</p> <p>Variations in rotation and orientation of the Moon are sensitive to solid-body tidal dissipation, dissipation due to relative motion at the <span class="hlt">fluid-core</span>/solid-mantle boundary, and tidal Love number k2 [1,2]. There is weaker sensitivity to flattening of the <span class="hlt">core</span>-mantle boundary (CMB) [2,3,4] and <span class="hlt">fluid</span> <span class="hlt">core</span> moment of inertia [1]. Accurate Lunar Laser Ranging (LLR) measurements of the distance from observatories on the Earth to four retroreflector arrays on the Moon are sensitive to lunar rotation and orientation variations and tidal displacements. Past solutions using the LLR data have given results for dissipation due to solid-body tides and <span class="hlt">fluid</span> <span class="hlt">core</span> [1] plus Love number [1-5]. Detection of CMB flattening, which in the past has been marginal but improving [3,4,5], now seems significant. Direct detection of the <span class="hlt">core</span> moment has not yet been achieved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://medlineplus.gov/ency/article/001187.htm','NIH-MEDLINEPLUS'); return false;" href="https://medlineplus.gov/ency/article/001187.htm"><span><span class="hlt">Fluid</span> imbalance</span></a></p> <p><a target="_blank" href="http://medlineplus.gov/">MedlinePlus</a></p> <p></p> <p></p> <p>... up in the body. This is called <span class="hlt">fluid</span> overload (volume overload). This can lead to edema (excess <span class="hlt">fluid</span> in ... Water imbalance; <span class="hlt">Fluid</span> imbalance - dehydration; <span class="hlt">Fluid</span> buildup; <span class="hlt">Fluid</span> overload; Volume overload; Loss of <span class="hlt">fluids</span>; Edema - <span class="hlt">fluid</span> imbalance; ...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/811812','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/811812"><span>HYDRATE <span class="hlt">CORE</span> DRILLING TESTS</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>John H. Cohen; Thomas E. Williams; Ali G. Kadaster; Bill V. Liddell</p> <p>2002-11-01</p> <p>The ''Methane Hydrate Production from Alaskan Permafrost'' project is a three-year endeavor being conducted by Maurer Technology Inc. (MTI), Noble, and Anadarko Petroleum, in partnership with the U.S. DOE National Energy Technology Laboratory (NETL). The project's goal is to build on previous and ongoing R&D in the area of onshore hydrate deposition. The project team plans to design and implement a program to safely and economically drill, <span class="hlt">core</span> and produce gas from arctic hydrates. The current work scope includes drilling and <span class="hlt">coring</span> one well on Anadarko leases in FY 2003 during the winter drilling season. A specially built on-site <span class="hlt">core</span> analysis laboratory will be used to determine some of the physical characteristics of the hydrates and surrounding rock. Prior to going to the field, the project team designed and conducted a controlled series of <span class="hlt">coring</span> tests for simulating <span class="hlt">coring</span> of hydrate formations. A variety of equipment and procedures were tested and modified to develop a practical solution for this special application. This Topical Report summarizes these <span class="hlt">coring</span> tests. A special facility was designed and installed at MTI's Drilling Research Center (DRC) in Houston and used to conduct <span class="hlt">coring</span> tests. Equipment and procedures were tested by cutting <span class="hlt">cores</span> from frozen mixtures of sand and water supported by casing and designed to simulate hydrate formations. Tests were conducted with chilled drilling <span class="hlt">fluids</span>. Tests showed that frozen <span class="hlt">core</span> can be washed out and reduced in size by the action of the drilling <span class="hlt">fluid</span>. Washing of the <span class="hlt">core</span> by the drilling <span class="hlt">fluid</span> caused a reduction in <span class="hlt">core</span> diameter, making <span class="hlt">core</span> recovery very difficult (if not impossible). One successful solution was to drill the last 6 inches of <span class="hlt">core</span> dry (without <span class="hlt">fluid</span> circulation). These tests demonstrated that it will be difficult to capture <span class="hlt">core</span> when drilling in permafrost or hydrates without implementing certain safeguards. Among the <span class="hlt">coring</span> tests was a simulated hydrate formation comprised of coarse, large</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19730037391&hterms=inner+critic&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3Dinner%2Bcritic','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19730037391&hterms=inner+critic&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3Dinner%2Bcritic"><span>The <span class="hlt">core</span> paradox.</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Kennedy, G. C.; Higgins, G. H.</p> <p>1973-01-01</p> <p>Rebuttal of suggestions from various critics attempting to provide an escape from the seeming paradox originated by Higgins and Kennedy's (1971) proposed possibility that the liquid in the outer <span class="hlt">core</span> was thermally stably stratified and that this stratification might prove a powerful inhibitor to circulation of the outer <span class="hlt">core</span> <span class="hlt">fluid</span> of the kind postulated for the generation of the earth's magnetic field. These suggestions are examined and shown to provide no reasonable escape from the <span class="hlt">core</span> paradox.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19730037391&hterms=paradox&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3Dparadox','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19730037391&hterms=paradox&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3Dparadox"><span>The <span class="hlt">core</span> paradox.</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Kennedy, G. C.; Higgins, G. H.</p> <p>1973-01-01</p> <p>Rebuttal of suggestions from various critics attempting to provide an escape from the seeming paradox originated by Higgins and Kennedy's (1971) proposed possibility that the liquid in the outer <span class="hlt">core</span> was thermally stably stratified and that this stratification might prove a powerful inhibitor to circulation of the outer <span class="hlt">core</span> <span class="hlt">fluid</span> of the kind postulated for the generation of the earth's magnetic field. These suggestions are examined and shown to provide no reasonable escape from the <span class="hlt">core</span> paradox.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://pubs.er.usgs.gov/publication/70021290','USGSPUBS'); return false;" href="http://pubs.er.usgs.gov/publication/70021290"><span><span class="hlt">Fluid</span>-deposited graphitic inclusions in quartz: Comparison between KTB (German Continental Deep-Drilling) <span class="hlt">core</span> samples and artificially reequilibrated natural inclusions</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Pasteris, J.D.; Chou, I.-Ming</p> <p>1998-01-01</p> <p>We used Raman microsampling spectroscopy (RMS) to determine the degree of crystallinity of minute (2-15 ??m) graphite inclusions in quartz in two sets of samples: experimentally reequilibrated <span class="hlt">fluid</span> inclusions in a natural quartz grain and biotite-bearing paragneisses from the KTB deep drillhole in SE Germany. Our sequential reequilibration experiments at 725??C on initially pure CO2 inclusions in a quartz wafer and the J. Krautheim (1993) experiments at 900-1100??C on organic compounds heated in gold or platinum capsules suggest that, at a given temperature, (1) <span class="hlt">fluid</span>-deposited graphite will have a lower crystallinity than metamorphosed organic matter and (2) that the crystallinity of <span class="hlt">fluid</span>-deposited graphite is affected by the composition of the <span class="hlt">fluid</span> from which it was deposited. We determined that the precipitation of more-crystalline graphite is favored by lower fH2 (higher fO2), and that the crystallinity of graphite is established by the conditions (including gas fugacities) that pertain as the <span class="hlt">fluid</span> first reaches graphite saturation. Graphite inclusions within quartz grains in the KTB rocks show a wide range in crystallinity index, reflecting three episodes of carbon entrapment under different metamorphic conditions. Isolated graphite inclusions have the spectral properties of totally ordered, completely crystalline graphite. Such crystallinity suggests that the graphite was incorporated from the surrounding metasedimentary rocks, which underwent metamorphism at upper amphibolite-facies conditions. Much of the <span class="hlt">fluid</span>-deposited graphite in <span class="hlt">fluid</span> inclusions, however, shows some spectral disorder. The properties of that graphite resemble those of experimental precipitates at temperatures in excess of 700??C and at elevated pressures, suggesting that the inclusions represent precipitates from C-O-H <span class="hlt">fluids</span> trapped under conditions near those of peak metamorphism at the KTB site. In contrast, graphite that is intimately associated with chlorite and other</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015EGUGA..17.2232D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015EGUGA..17.2232D"><span>Mercury's inner <span class="hlt">core</span> size and <span class="hlt">core</span> crystallization regime</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Dumberry, Mathieu; Rivoldini, Attilio</p> <p>2015-04-01</p> <p>Earth-based radar observation of Mercury's rotation vector combined with gravity observation by the MESSENGER spacecraft yield a measure of Mercury's moment of inertia and the amplitude of the 88-day libration of its silicate shell. These two geodetic constraints provide information on Mercury's interior structure, including the presence of a <span class="hlt">fluid</span> <span class="hlt">core</span>, the radius of the <span class="hlt">core</span>-mantle boundary and the bulk densities of the <span class="hlt">core</span> and mantle. In this work, we show how they further provide information on the size of the solid inner <span class="hlt">core</span> and on the crystallization regime of the <span class="hlt">fluid</span> <span class="hlt">core</span>. If Mercury's <span class="hlt">fluid</span> <span class="hlt">core</span> is a Fe-FeS alloy, the largest inner <span class="hlt">core</span> compatible with geodetic observations is 1325 ± 250 km. The crystallization scenario that best fits the observations involves the formation of Fe-snow within the <span class="hlt">fluid</span> <span class="hlt">core</span>. Snow formation can be restricted to a thin layer or can occupy the whole of the <span class="hlt">fluid</span> <span class="hlt">core</span> depending on inner <span class="hlt">core</span> size and initial sulfur concentration. Our results offer important constraints for dynamo models of Mercury, but also advocate for the further development of models that incorporate the various features of snow formation.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015Icar..248..254D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015Icar..248..254D"><span>Mercury's inner <span class="hlt">core</span> size and <span class="hlt">core</span>-crystallization regime</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Dumberry, Mathieu; Rivoldini, Attilio</p> <p>2015-03-01</p> <p>Earth-based radar observation of Mercury's rotation vector combined with gravity observation by the MESSENGER spacecraft yield a measure of Mercury's moment of inertia and the amplitude of the 88-day libration of its silicate shell. These two geodetic constraints provide information on Mercury's interior structure, including the presence of a <span class="hlt">fluid</span> <span class="hlt">core</span>, the radius of the <span class="hlt">core</span>-mantle boundary and the bulk densities of the <span class="hlt">core</span> and mantle. In this work, we show how they further provide information on the size of the solid inner <span class="hlt">core</span> and on the crystallization regime of the <span class="hlt">fluid</span> <span class="hlt">core</span>. If Mercury's <span class="hlt">fluid</span> <span class="hlt">core</span> is a Fe-FeS alloy with a sulfur concentration on the Fe-rich side of the eutectic, the largest inner <span class="hlt">core</span> compatible with geodetic observations at the 1σ level is 1325 ± 250 km. Our results further suggest that the crystallization scenario that best fits the geodetic observations involves the formation of Fe-snow within the <span class="hlt">fluid</span> <span class="hlt">core</span>, and that this scenario is preferred for models with an iron-poor mantle composition. Consequently, Mercury's dynamo most likely operates in concert with snow formation. For an inner <span class="hlt">core</span> larger than ∼650 km, snow formation extends to the inner <span class="hlt">core</span> boundary. If a dynamo cannot be maintained by the dynamics of snow formation, or if such dynamo produces a magnetic field incompatible with observation, Mercury's inner <span class="hlt">core</span> must then be smaller than 650 km.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/5517893','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/5517893"><span>Recent developments in pressure <span class="hlt">coring</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>McFall, A. L.</p> <p>1980-01-01</p> <p>The current rapid growth in the number of enhanced oil and gas recovery projects has created a strong demand for reservoir data such as true residual oil saturations. The companies providing pressure <span class="hlt">coring</span> services have moved to fill this need. Two recent developments have emerged with the potential of significantly improving the present performance of pressure <span class="hlt">coring</span>. <span class="hlt">Coring</span> bits utilizing synthetic diamond cutters have demonstrated <span class="hlt">coring</span> rates of one-foot per minute while improving <span class="hlt">core</span> recovery. It is also apparent that <span class="hlt">cores</span> of a near-unconsolidated nature are more easily recovered. In addition, a special low invasion <span class="hlt">fluid</span> that is placed in the <span class="hlt">core</span> retriever has demonstrated reduced <span class="hlt">core</span> washing by the drilling mud and a decrease in the complexity of preparing <span class="hlt">cores</span> for analysis. This paper describes the design, laboratory, and field testing efforts that led to these <span class="hlt">coring</span> improvements. Also, experience in utilizing these developments while recovering over 100 <span class="hlt">cores</span> is discussed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014Nanos...6.5230K','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014Nanos...6.5230K"><span>Nanometer precise adjustment of the silver shell thickness during automated Au-Ag <span class="hlt">core</span>-shell nanoparticle synthesis in micro <span class="hlt">fluid</span> segment sequences</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Knauer, Andrea; Eisenhardt, Anja; Krischok, Stefan; Koehler, J. Michael</p> <p>2014-04-01</p> <p>In this work, a wet-chemical synthesis method for gold-silver <span class="hlt">core</span>-shell particles with nanometer precise adjustable silver shell thicknesses is presented. Typically wet-chemical syntheses lead to relatively large diameter size distributions and losses in the yield of the desired particle structure due to thermodynamical effects. With the here explained synthesis method in micro fluidic segment sequences, a combinatorial in situ parameter screening of the reactant concentration ratios by programmed flow rate shifts in conjunction with efficient segment internal mixing conditions is possible. The highly increased mixing rates ensure a homogeneous shell deposition on all presented gold <span class="hlt">core</span> particles while the amount of available silver ions was adjusted by automated flow rate courses, from which the synthesis conditions for exactly tunable shell thicknesses between 1.1 and 6.1 nm could be derived. The findings according to the homogeneity of size and particle structure were confirmed by differential centrifugal sedimentation (DCS), scanning and transmission electron microscopy (SEM, TEM) and X-ray photoelectron spectroscopy (XPS) measurements. In UV-Vis measurements, a significant contribution of the <span class="hlt">core</span> metal was found in the shape of the extinction spectra in the case of thin shells. These results were confirmed by theoretical calculations.In this work, a wet-chemical synthesis method for gold-silver <span class="hlt">core</span>-shell particles with nanometer precise adjustable silver shell thicknesses is presented. Typically wet-chemical syntheses lead to relatively large diameter size distributions and losses in the yield of the desired particle structure due to thermodynamical effects. With the here explained synthesis method in micro fluidic segment sequences, a combinatorial in situ parameter screening of the reactant concentration ratios by programmed flow rate shifts in conjunction with efficient segment internal mixing conditions is possible. The highly increased mixing rates</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1998APS..DFD...C02H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1998APS..DFD...C02H"><span><span class="hlt">FLUID</span> DYNAMICS PRIZE: W.C. Reynolds, Stanford University, presiding: <span class="hlt">Core</span> Dynamics Instability of a Vortex in Shear: A Physical-Space Cascade Mechanism</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Hussain, Fazle</p> <p>1998-11-01</p> <p>We study a rectilinear vortex normal to a uniform shear - a prototypical coherent structure in shear flows. A newly found instability of the vortex due to <span class="hlt">core</span> size variations, absent without shear, is shown to result from stretching by shear of helically twisted vortex lines. <span class="hlt">Core</span> Dynamics (CD)-induced strong axial flow generates a large low-enstrophy bubble, surrounded by a thin sheath of vorticity, which rolls up into fine-scale vortices due to localized instability. Additionally, fine-scale 3D vorticity fluctuations are generated within the bubble by vortex filament folding and reconnection. Despite its smaller linear growth rate compared to vortex bending modes, the CD instability (CDI) is shown to dominate transition and cascade when both modes are present. In particular, CDI of spanwise rolls by oblique modes dominates transition in a mixing layer (ML) even in the presence of well developed ribs. Interestingly, initiation of CDI in a ML closely resembles streak instability in fully-developed near-wall turbulence, the latter producing streamwise vortices and hence enhanced drag.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/864461','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/864461"><span>Emergency <span class="hlt">core</span> cooling system</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Schenewerk, William E.; Glasgow, Lyle E.</p> <p>1983-01-01</p> <p>A liquid metal cooled fast breeder reactor provided with an emergency <span class="hlt">core</span> cooling system includes a reactor vessel which contains a reactor <span class="hlt">core</span> comprising an array of fuel assemblies and a plurality of blanket assemblies. The reactor <span class="hlt">core</span> is immersed in a pool of liquid metal coolant. The reactor also includes a primary coolant system comprising a pump and conduits for circulating liquid metal coolant to the reactor <span class="hlt">core</span> and through the fuel and blanket assemblies of the <span class="hlt">core</span>. A converging-diverging venturi nozzle with an intermediate throat section is provided in between the assemblies and the pump. The intermediate throat section of the nozzle is provided with at least one opening which is in <span class="hlt">fluid</span> communication with the pool of liquid sodium. In normal operation, coolant flows from the pump through the nozzle to the assemblies with very little <span class="hlt">fluid</span> flowing through the opening in the throat. However, when the pump is not running, residual heat in the <span class="hlt">core</span> causes <span class="hlt">fluid</span> from the pool to flow through the opening in the throat of the nozzle and outwardly through the nozzle to the assemblies, thus providing a means of removing decay heat.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19820027810&hterms=Earth+core&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D50%26Ntt%3DEarth%2Bcore','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19820027810&hterms=Earth+core&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D50%26Ntt%3DEarth%2Bcore"><span>Models of the earth's <span class="hlt">core</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Stevenson, D. J.</p> <p>1981-01-01</p> <p>Combined inferences from seismology, high-pressure experiment and theory, geomagnetism, <span class="hlt">fluid</span> dynamics, and current views of terrestrial planetary evolution lead to models of the earth's <span class="hlt">core</span> with five basic properties. These are that <span class="hlt">core</span> formation was contemporaneous with earth accretion; the <span class="hlt">core</span> is not in chemical equilibrium with the mantle; the outer <span class="hlt">core</span> is a <span class="hlt">fluid</span> iron alloy containing significant quantities of lighter elements and is probably almost adiabatic and compositionally uniform; the more iron-rich inner solid <span class="hlt">core</span> is a consequence of partial freezing of the outer <span class="hlt">core</span>, and the energy release from this process sustains the earth's magnetic field; and the thermodynamic properties of the <span class="hlt">core</span> are well constrained by the application of liquid-state theory to seismic and labroatory data.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19820027810&hterms=Geomagnetism&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3DGeomagnetism','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19820027810&hterms=Geomagnetism&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3DGeomagnetism"><span>Models of the earth's <span class="hlt">core</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Stevenson, D. J.</p> <p>1981-01-01</p> <p>Combined inferences from seismology, high-pressure experiment and theory, geomagnetism, <span class="hlt">fluid</span> dynamics, and current views of terrestrial planetary evolution lead to models of the earth's <span class="hlt">core</span> with five basic properties. These are that <span class="hlt">core</span> formation was contemporaneous with earth accretion; the <span class="hlt">core</span> is not in chemical equilibrium with the mantle; the outer <span class="hlt">core</span> is a <span class="hlt">fluid</span> iron alloy containing significant quantities of lighter elements and is probably almost adiabatic and compositionally uniform; the more iron-rich inner solid <span class="hlt">core</span> is a consequence of partial freezing of the outer <span class="hlt">core</span>, and the energy release from this process sustains the earth's magnetic field; and the thermodynamic properties of the <span class="hlt">core</span> are well constrained by the application of liquid-state theory to seismic and labroatory data.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/17839632','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/17839632"><span>Models of the Earth's <span class="hlt">Core</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Stevenson, D J</p> <p>1981-11-06</p> <p>Combined inferences from seismology, high-pressure experiment and theory, geomagnetism, <span class="hlt">fluid</span> dynamics, and current views of terrestrial planetary evolution lead to models of the earth's <span class="hlt">core</span> with the following properties. <span class="hlt">Core</span> formation was contemporaneous with earth accretion; the <span class="hlt">core</span> is not in chemical equilibrium with the mantle; the outer <span class="hlt">core</span> is a <span class="hlt">fluid</span> iron alloy containing significant quantities of lighter elements and is probably almost adiabatic and compositionally uniform; the more iron-rich inner solid <span class="hlt">core</span> is a consequence of partial freezing of the outer <span class="hlt">core</span>, and the energy release from this process sustains the earth's magnetic field; and the thermodynamic properties of the <span class="hlt">core</span> are well constrained by the application of liquid-state theory to seismic and laboratory data.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26484901','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26484901"><span>Effect of Tween-20 on <span class="hlt">Core</span> Biomarkers Measured in Cerebrospinal <span class="hlt">Fluid</span> from Patients with Alzheimer's Disease, Mild Cognitive Impairment, or Healthy Control Individuals.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Berge, Guro; Lauridsen, Camilla; Sando, Sigrid Botne; Holder, Daniel Joseph; Møller, Ina; Aasly, Jan Olav; Bråthen, Geir; Savage, Mary Josephine; White, Linda Rosemary</p> <p>2016-01-01</p> <p>There is substantial variation caused by preanalytical procedures in the measurement of cerebrospinal <span class="hlt">fluid</span> (CSF) biomarkers for Alzheimer's disease (AD) reported in the literature. Determine whether the detergent Tween-20 improves diagnostic accuracy. CSF proteins (Aβ42, Aβ40, total tau, and phosphorylated tau) were measured by standard ELISA, in uncentrifuged CSF with or without 0.05% Tween-20 from patients with AD or amnestic mild cognitive impairment, and healthy elderly controls. In the main study, collection tubes containing Tween-20 (Sarstedt 15 mL) were filled with 5 mL CSF to ensure consistent detergent concentration across subsequent aliquots into Corning 2 mL tubes. These latter were also the primary collection vessel for samples without Tween-20. The effect of centrifugation, and extra tube transfer of samples with Tween-20 were also examined. 0.05% Tween-20 significantly increased mean measured CSF concentration of Aβ42 (30% ), Aβ40 (23% ), and total tau (4% ), but not phosphorylated tau. Generally, these increases were similar in all groups, although for Aβ42, the mean percentage increase with Tween-20 was slightly larger for AD. Areas under receiver-operator characteristic curves were similar whether Tween-20 was present or not. Centrifuged CSF without Tween-20 significantly reduced the measured concentration of Aβ42 versus non-centrifuged samples, a difference not seen when detergent was added. Similar CSF Aβ42 levels were found whether Tween-20 was added at collection in an extra tube or directly to the main collection tube. Addition of Tween-20 to CSF did not improve differentiation of patients from controls.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/6886487','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/6886487"><span>Bed-parallel calcite veins in the <span class="hlt">core</span> of Wills Mountain anticline: Implications for deformation conditions and <span class="hlt">fluid</span> flow during the Alleghanian orogeny</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Evans, M.A.; Battles, D.A. . Dept. of Geology and Geography)</p> <p>1994-03-01</p> <p>Thick, bed-parallel to sub-bed-parallel calcite veins are found in Upper Ordovician Trenton and Black River Group limestones exposed in the <span class="hlt">core</span> of Wills Mountain anticline, Pendleton County, West Virginia. The veins range in thickness from less than 5 centimeters to over 2 meters, and contain individual crystals up to 20 centimeters across. The veins have a 1 to 3 mete spacing, and are planar to lensoid. They are also subhorizontal, and can be traced for tens of meters along the outcrop. The calcite is opaque to translucent white, and occasionally colorless and transparent. Tectonic slickenlines are found at the top and bottom margins of the veins, as well as within the veins. These slickenlines indicate transport directed toward 280[degree]--315[degree]. When crushed the calcite emits a strong odor of H[sub 2]S. The calcite contains abundant two-phase aqueous inclusions that have ice melting temperatures (T[sub m]) of [minus]9.0 to [minus]14.1 C. This corresponds to a salinity of 13 to 17 wt.% NaCl equiv. Inclusion homogenization (T[sub b]) values range from 91.8 to 135.1 C, with a medium value of 124 C. Since the calcite veins are bed-parallel and subhorizontal, they must have formed under lithostatic conditions. The calcite veins occur along a fault that is proposed to be a splay from the Ordovician Martinsburg Fm. decollement. This major decollement separates two Cambro-Ordovician carbonate flats east of the Wills Mountain anticline. The splay served as a conduit for the release of massive amounts of H[sub 2]S-saturated brine from the decollement.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20020087020','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20020087020"><span>Composite <span class="hlt">Cores</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p></p> <p>1990-01-01</p> <p>Spang & Company's new configuration of converter transformer <span class="hlt">cores</span> is a composite of gapped and ungapped <span class="hlt">cores</span> assembled together in concentric relationship. The net effect of the composite design is to combine the protection from saturation offered by the gapped <span class="hlt">core</span> with the lower magnetizing requirement of the ungapped <span class="hlt">core</span>. The uncut <span class="hlt">core</span> functions under normal operating conditions and the cut <span class="hlt">core</span> takes over during abnormal operation to prevent power surges and their potentially destructive effect on transistors. Principal customers are aerospace and defense manufacturers. <span class="hlt">Cores</span> also have applicability in commercial products where precise power regulation is required, as in the power supplies for large mainframe computers.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://pubs.er.usgs.gov/publication/70035383','USGSPUBS'); return false;" href="http://pubs.er.usgs.gov/publication/70035383"><span>Postimpact heat conduction and compaction-driven <span class="hlt">fluid</span> flow in the Chesapeake Bay impact structure based on downhole vitrinite reflectance data, ICDP-USGS Eyreville deep <span class="hlt">core</span> holes and Cape Charles test holes</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Malinconico, M.L.; Sanford, W.E.; Wright, Horton W.J.J.</p> <p>2009-01-01</p> <p>Vitrinite reflectance data from the International Continental Scientific Drilling Program (ICDP)-U.S. Geological Survey (USGS) Eyreville deep <span class="hlt">cores</span> in the centralcrater moat of the Chesapeake Bay impact structure and the Cape Charles test holes on the central uplift show patterns of postimpact maximum-temperature distribution that result from a combination of conductive and advective heat flow. Within the crater-fill sediment-clast breccia sequence at Eyreville, an isoreflectance (-0.44% Ro) section (525-1096 m depth) is higher than modeled background coastal-plain maturity and shows a pattern typical of advective <span class="hlt">fluid</span> flow. Below an intervening granite slab, a short interval of sediment-clast breccia (1371-1397 m) shows a sharp increase in reflectance (0.47%-0.91% Ro) caused by conductive heat from the underlying suevite (1397-1474 m). Refl ectance data in the uppermost suevite range from 1.2% to 2.1% Ro. However, heat conduction alone is not sufficient to affect the temperature of sediments more than 100 m above the suevite. Thermal modeling of the Eyreville suevite as a 390 ??C cooling sill-like hot rock layer supplemented by compaction- driven vertical <span class="hlt">fluid</span> flow (0.046 m/a) of cooling suevitic <span class="hlt">fluids</span> and deeper basement brines (120 ??C) upward through the sediment breccias closely reproduces the measured reflectance data. This scenario would also replace any marine water trapped in the crater fill with more saline brine, similar to that currently in the crater, and it would produce temperatures sufficient to kill microbes in sediment breccias within 450 m above the synimsuevite. A similar downhole maturity pattern is present in the sediment-clast breccia over the central uplift. High-reflectance (5%-9%) black shale and siltstone clasts in the suevite and sediment-clast breccia record a pre-impact (Paleozoic?) metamorphic event. Previously published maturity data in the annular trough indicate no thermal effect there from impact-related processes. ?? 2009 The</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/5536303','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/5536303"><span><span class="hlt">Fluid</span>-loss control</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Crowe, C.W.; Trittipo, B.L. ); Hutchinson, B.H. )</p> <p>1989-08-01</p> <p>Acid <span class="hlt">fluid</span> loss is extremely difficult to control and is generally considered to be the major factor limiting the effectiveness of acid fracturing treatments. Chemical erosion of fracture faces and the development of wormholes are largely responsible for the reduced efficiency of acid fracturing <span class="hlt">fluids</span>. The creation of acid wormholes increases the effective area from which leakoff occurs, thus reducing the acid hydraulic efficiency. Once wormholes form, most acid <span class="hlt">fluid</span> loss originates from these wormholes rather than penetrating uniformly into the fracture face. Methods of acid <span class="hlt">fluid</span>-loss control are discussed and evaluated with an improved <span class="hlt">fluid</span>-loss test procedure. This procedure uses limestone <span class="hlt">cores</span> of sufficient length to contain wormhole growth. Studies demonstrate that if wormhole growth can be controlled, acid <span class="hlt">fluid</span> loss approaches that of nonreactive <span class="hlt">fluids</span>. An improved acid fracturing <span class="hlt">fluid</span> having unique rheological characteristics is described. This acid has a low initial viscosity but temporarily becomes extremely viscous during leakoff. This high leakoff viscosity blocks wormhole development and prevents acid entry into natural fractures. After the treatment, spent-acid viscosity declines rapidly to ensure easier cleanup.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li class="active"><span>8</span></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_8 --> <div id="page_9" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li class="active"><span>9</span></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="161"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/8943197','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/8943197"><span>Rotation and Magnetism of Earth's Inner <span class="hlt">Core</span></span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Glatzmaier; Roberts</p> <p>1996-12-13</p> <p>Three-dimensional numerical simulations of the geodynamo suggest that a super- rotation of Earth's solid inner <span class="hlt">core</span> relative to the mantle is maintained by magnetic coupling between the inner <span class="hlt">core</span> and an eastward thermal wind in the <span class="hlt">fluid</span> outer <span class="hlt">core</span>. This mechanism, which is analogous to a synchronous motor, also plays a fundamental role in the generation of Earth's magnetic field.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/5393728','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/5393728"><span>Sponge <span class="hlt">coring</span> apparatus with reinforced sponge</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Park, A.; Wilson, B. T.</p> <p>1985-03-05</p> <p>A well <span class="hlt">coring</span> apparatus includes an outer barrel and an inner barrel. A hollow sponge is disposed along a liner for insertion into the inner barrel. The sponge is operable to absorb subterranean <span class="hlt">fluid</span> from a well <span class="hlt">core</span>. A plurality of reinforcing members are disposed on the inner surface of the liner to prevent movement of the sponge with respect thereto. A plurality of orifices are disposed in the surface of the liner to allow gas and/or <span class="hlt">fluid</span> to escape from the interior thereof when the subterranean <span class="hlt">fluid</span> contained within the <span class="hlt">core</span> bleeds into the sponge.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://images.nasa.gov/#/details-0700441.html','SCIGOVIMAGE-NASA'); return false;" href="https://images.nasa.gov/#/details-0700441.html"><span><span class="hlt">Fluid</span> Physics</span></a></p> <p><a target="_blank" href="https://images.nasa.gov/">NASA Image and Video Library</a></p> <p></p> <p>2002-12-12</p> <p>These are video microscope images of magnetorheological (MR) <span class="hlt">fluids</span>, illuminated with a green light. Those on Earth, left, show the MR <span class="hlt">fluid</span> forming columns or spikes structures. On the right, the <span class="hlt">fluids</span> in microgravity aboard the International Space Station (ISS), formed broader columns.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=Newton%2c+AND+Isaac&pg=3&id=EJ364161','ERIC'); return false;" href="https://eric.ed.gov/?q=Newton%2c+AND+Isaac&pg=3&id=EJ364161"><span><span class="hlt">Fluid</span> Mechanics.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Drazin, Philip</p> <p>1987-01-01</p> <p>Outlines the contents of Volume II of "Principia" by Sir Isaac Newton. Reviews the contributions of subsequent scientists to the physics of <span class="hlt">fluid</span> dynamics. Discusses the treatment of <span class="hlt">fluid</span> mechanics in physics curricula. Highlights a few of the problems of modern research in <span class="hlt">fluid</span> dynamics. Shows that problems still remain. (CW)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Newton%2c+AND+Isaac&pg=3&id=EJ364161','ERIC'); return false;" href="http://eric.ed.gov/?q=Newton%2c+AND+Isaac&pg=3&id=EJ364161"><span><span class="hlt">Fluid</span> Mechanics.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Drazin, Philip</p> <p>1987-01-01</p> <p>Outlines the contents of Volume II of "Principia" by Sir Isaac Newton. Reviews the contributions of subsequent scientists to the physics of <span class="hlt">fluid</span> dynamics. Discusses the treatment of <span class="hlt">fluid</span> mechanics in physics curricula. Highlights a few of the problems of modern research in <span class="hlt">fluid</span> dynamics. Shows that problems still remain. (CW)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/404764','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/404764"><span>Electrorheological <span class="hlt">fluids</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Adolf, D.; Anderson, R.; Garino, T.; Halsey, T.C.; Hance, B.; Martin, J.E.; Odinek, J.</p> <p>1996-10-01</p> <p>An Electrorheological <span class="hlt">fluid</span> is normally a low-viscosity colloidal suspension, but when an electric field is applied, the <span class="hlt">fluid</span> undergoes a reversible transition to a solid, being able to support considerable stress without yield. Commercial possibilities for such <span class="hlt">fluids</span> are enormous, including clutches, brakes, valves,shock absorbers, and stepper motors. However, performance of current <span class="hlt">fluids</span> is inadequate for many proposed applications. Our goal was to engineer improved <span class="hlt">fluids</span> by investigating the key technical issues underlying the solid-phase yield stress and the liquid to solid switching time. Our studies focused on field-induced interactions between colloidal particles that lead to solidification, the relation between <span class="hlt">fluid</span> structure and performance (viscosity, yield stress), and the time evolution of structure in the <span class="hlt">fluid</span> as the field is switched on or off.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27070765','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27070765"><span>Complex <span class="hlt">Fluids</span> and Hydraulic Fracturing.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Barbati, Alexander C; Desroches, Jean; Robisson, Agathe; McKinley, Gareth H</p> <p>2016-06-07</p> <p>Nearly 70 years old, hydraulic fracturing is a <span class="hlt">core</span> technique for stimulating hydrocarbon production in a majority of oil and gas reservoirs. Complex <span class="hlt">fluids</span> are implemented in nearly every step of the fracturing process, most significantly to generate and sustain fractures and transport and distribute proppant particles during and following <span class="hlt">fluid</span> injection. An extremely wide range of complex <span class="hlt">fluids</span> are used: naturally occurring polysaccharide and synthetic polymer solutions, aqueous physical and chemical gels, organic gels, micellar surfactant solutions, emulsions, and foams. These <span class="hlt">fluids</span> are loaded over a wide range of concentrations with particles of varying sizes and aspect ratios and are subjected to extreme mechanical and environmental conditions. We describe the settings of hydraulic fracturing (framed by geology), fracturing mechanics and physics, and the critical role that non-Newtonian <span class="hlt">fluid</span> dynamics and complex <span class="hlt">fluids</span> play in the hydraulic fracturing process.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014AGUFM.B22B..01S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014AGUFM.B22B..01S"><span>Pressure <span class="hlt">Core</span> Characterization</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Santamarina, J. C.</p> <p>2014-12-01</p> <p>Natural gas hydrates form under high <span class="hlt">fluid</span> pressure and low temperature, and are found in permafrost, deep lakes or ocean sediments. Hydrate dissociation by depressurization and/or heating is accompanied by a multifold hydrate volume expansion and host sediments with low permeability experience massive destructuration. Proper characterization requires <span class="hlt">coring</span>, recovery, manipulation and testing under P-T conditions within the stability field. Pressure <span class="hlt">core</span> technology allows for the reliable characterization of hydrate bearing sediments within the stability field in order to address scientific and engineering needs, including the measurement of parameters used in hydro-thermo-mechanical analyses, and the monitoring of hydrate dissociation under controlled pressure, temperature, effective stress and chemical conditions. Inherent sampling effects remain and need to be addressed in test protocols and data interpretation. Pressure <span class="hlt">core</span> technology has been deployed to study hydrate bearing sediments at several locations around the world. In addition to pressure <span class="hlt">core</span> testing, a comprehensive characterization program should include sediment analysis, testing of reconstituted specimens (with and without synthetic hydrate), and in situ testing. Pressure <span class="hlt">core</span> characterization technology can be used to study other gas-charged formations such as deep sea sediments, coal bed methane and gas shales.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/869041','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/869041"><span>Supercritical <span class="hlt">fluid</span> reverse micelle separation</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Fulton, John L.; Smith, Richard D.</p> <p>1993-01-01</p> <p>A method of separating solute material from a polar <span class="hlt">fluid</span> in a first polar <span class="hlt">fluid</span> phase is provided. The method comprises combining a polar <span class="hlt">fluid</span>, a second <span class="hlt">fluid</span> that is a gas at standard temperature and pressure and has a critical density, and a surfactant. The solute material is dissolved in the polar <span class="hlt">fluid</span> to define the first polar <span class="hlt">fluid</span> phase. The combined polar and second <span class="hlt">fluids</span>, surfactant, and solute material dissolved in the polar <span class="hlt">fluid</span> is maintained under near critical or supercritical temperature and pressure conditions such that the density of the second <span class="hlt">fluid</span> exceeds the critical density thereof. In this way, a reverse micelle system defining a reverse micelle solvent is formed which comprises a continuous phase in the second <span class="hlt">fluid</span> and a plurality of reverse micelles dispersed in the continuous phase. The solute material is dissolved in the polar <span class="hlt">fluid</span> and is in chemical equilibrium with the reverse micelles. The first polar <span class="hlt">fluid</span> phase and the continuous phase are immiscible. The reverse micelles each comprise a dynamic aggregate of surfactant molecules surrounding a <span class="hlt">core</span> of the polar <span class="hlt">fluid</span>. The reverse micelle solvent has a polar <span class="hlt">fluid</span>-to-surfactant molar ratio W, which can vary over a range having a maximum ratio W.sub.o that determines the maximum size of the reverse micelles. The maximum ratio W.sub.o of the reverse micelle solvent is then varied, and the solute material from the first polar <span class="hlt">fluid</span> phase is transported into the reverse micelles in the continuous phase at an extraction efficiency determined by the critical or supercritical conditions.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/5284002','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/biblio/5284002"><span>Supercritical <span class="hlt">fluid</span> reverse micelle separation</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Fulton, J.L.; Smith, R.D.</p> <p>1993-11-30</p> <p>A method of separating solute material from a polar <span class="hlt">fluid</span> in a first polar <span class="hlt">fluid</span> phase is provided. The method comprises combining a polar <span class="hlt">fluid</span>, a second <span class="hlt">fluid</span> that is a gas at standard temperature and pressure and has a critical density, and a surfactant. The solute material is dissolved in the polar <span class="hlt">fluid</span> to define the first polar <span class="hlt">fluid</span> phase. The combined polar and second <span class="hlt">fluids</span>, surfactant, and solute material dissolved in the polar <span class="hlt">fluid</span> is maintained under near critical or supercritical temperature and pressure conditions such that the density of the second <span class="hlt">fluid</span> exceeds the critical density thereof. In this way, a reverse micelle system defining a reverse micelle solvent is formed which comprises a continuous phase in the second <span class="hlt">fluid</span> and a plurality of reverse micelles dispersed in the continuous phase. The solute material is dissolved in the polar <span class="hlt">fluid</span> and is in chemical equilibrium with the reverse micelles. The first polar <span class="hlt">fluid</span> phase and the continuous phase are immiscible. The reverse micelles each comprise a dynamic aggregate of surfactant molecules surrounding a <span class="hlt">core</span> of the polar <span class="hlt">fluid</span>. The reverse micelle solvent has a polar <span class="hlt">fluid</span>-to-surfactant molar ratio W, which can vary over a range having a maximum ratio W[sub o] that determines the maximum size of the reverse micelles. The maximum ratio W[sub o] of the reverse micelle solvent is then varied, and the solute material from the first polar <span class="hlt">fluid</span> phase is transported into the reverse micelles in the continuous phase at an extraction efficiency determined by the critical or supercritical conditions. 27 figures.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1231807','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1231807"><span>GEOS-<span class="hlt">CORE</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p></p> <p>2014-06-24</p> <p>GEOS-<span class="hlt">CORE</span> is a code that integrates open source Libraries for linear algebra and I/O with two main LLNL-written components: (i) a set of standard finite, discrete, and discontinuous displacement element physics solvers for resolving Darcy <span class="hlt">fluid</span> flow, explicit mechanics, implicit mechanics, and <span class="hlt">fluid</span>-mediated fracturing, including resolution of physical behaviors both implicitly and explicitly, and (ii) a MPI-based parallelization implementation for use on generic HPC distributed memory architectures. The resultant code can be used alone for linearly elastic and quasistatic damage problems; problems involving hydraulic fracturing, where the mesh topology is dynamically changed; and general granular materials behavior. The key application domain is for low-rate stimulation and fracture control in subsurface reservoirs (e.g., enhanced geothermal sites and unconventional shale gas stimulation). GEOS-<span class="hlt">CORE</span> also has interfaces to call external libraries for, e.g., material models and equations fo state; however, LLNL-developed EOS and material models, beyond the aforementioned linear elastic and quasi-static damage models, will not be part of the current release. GEOS-<span class="hlt">CORE</span>'s secondary applications include granular materials behavior under different load paths.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1995RvGeS..33..443R','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1995RvGeS..33..443R"><span>Dynamics of the <span class="hlt">core</span>, geodynamo</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Roberts, Paul H.</p> <p>1995-07-01</p> <p>"The mechanism for generating the geomagnetic field remains one of the central unsolved problems in geoscience." So states the report on the National Geomagnetic Initiative (NGI) prepared by the U.S. Geodynamics Committee, et al [1993], with advice from the NGI Workshop held in Washington D.C. in March 1992. All analyses of the geomagnetic data point to the <span class="hlt">core</span> as containing the source of the field and "The basic premise that virtually everyone accepts is that the Earth's magnetism is created by a self-sustaining dynamo driven by <span class="hlt">fluid</span> motions in Earth's <span class="hlt">core</span>" (NGI, p.135). Dynamical questions at once arise, such as "What is the energy source driving those motions?" Jacobs [1953] proposed that the solid inner <span class="hlt">core</span> (SIC) is the result of the freezing of the <span class="hlt">fluid</span> outer <span class="hlt">core</span> (FOC). Verhoogen [1961] noticed that the release of latent heat at the inner <span class="hlt">core</span> boundary (ICB) during freezing would help drive thermal convection in the FOC, and Braginsky [1963] pointed out that the release of the light alloying elements during fractionation at the ICB would provide compositional buoyancy. These two sources suffice to supply the geodynamo with energy throughout geological time, even in the absence of dissolved radioactivity in the <span class="hlt">core</span> [Braginsky and Roberts, 1994a; Kuang et al, 1994]. Stevenson [1991] argues that potential differences on the <span class="hlt">core</span>-mantle boundary (CMB) of electrochemical origin may be partially responsible for the geomagnetic field.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/10576731','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/10576731"><span><span class="hlt">Core</span> rotational dynamics and geological events</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Greff-Lefftz; Legros</p> <p>1999-11-26</p> <p>A study of Earth's <span class="hlt">fluid</span> <span class="hlt">core</span> oscillations induced by lunar-solar tidal forces, together with tidal secular deceleration of Earth's axial rotation, shows that the rotational eigenfrequency of the <span class="hlt">fluid</span> <span class="hlt">core</span> and some solar tidal waves were in resonance around 3.0 x 10(9), 1.8 x 10(9), and 3 x 10(8) years ago. The associated viscomagnetic frictional power at the <span class="hlt">core</span> boundaries may be converted into heat and would destabilize the D" thermal layer, leading to the generation of deep-mantle plumes, and would also increase the temperature at the <span class="hlt">fluid</span> <span class="hlt">core</span> boundaries, perturbing the <span class="hlt">core</span> dynamo process. Such phenomena could account for large-scale episodes of continental crust formation, the generation of flood basalts, and abrupt changes in geomagnetic reversal frequency.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1073781','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1073781"><span>Stability of Molten <span class="hlt">Core</span> Materials</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Layne Pincock; Wendell Hintze</p> <p>2013-01-01</p> <p>The purpose of this report is to document a literature and data search for data and information pertaining to the stability of nuclear reactor molten <span class="hlt">core</span> materials. This includes data and analysis from TMI-2 fuel and INL’s LOFT (Loss of <span class="hlt">Fluid</span> Test) reactor project and other sources.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('//www.loc.gov/pictures/collection/hh/item/al1054.photos.046338p/','SCIGOV-HHH'); return false;" href="//www.loc.gov/pictures/collection/hh/item/al1054.photos.046338p/"><span>24. A <span class="hlt">CORE</span> WORKER DISPLAYS THE <span class="hlt">CORE</span> BOX AND <span class="hlt">CORES</span> ...</span></a></p> <p><a target="_blank" href="http://www.loc.gov/pictures/collection/hh/">Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey</a></p> <p></p> <p></p> <p>24. A <span class="hlt">CORE</span> WORKER DISPLAYS THE <span class="hlt">CORE</span> BOX AND <span class="hlt">CORES</span> FOR A BRASS GATE VALVE BODY MADE ON A <span class="hlt">CORE</span> BOX, CA. 1950. - Stockham Pipe & Fittings Company, 4000 Tenth Avenue North, Birmingham, Jefferson County, AL</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2003EAEJA.....5852V','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2003EAEJA.....5852V"><span>The Special Bureau for the <span class="hlt">Core</span> of the IERS</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>van Hoolst, T.; Dehant, V.</p> <p>2003-04-01</p> <p>In 1998, the IERS established the Global Geophysical <span class="hlt">Fluids</span> Center (GGFC), which consists of eight Special Bureaus for the different geophysical <span class="hlt">fluids</span>. The Special Bureau for the <span class="hlt">Core</span> (SBC) focuses on theoretical modelling and observations related to <span class="hlt">core</span> flow, and on inner <span class="hlt">core</span> - outer <span class="hlt">core</span> - mantle interactions. The <span class="hlt">fluid</span> outer <span class="hlt">core</span> is in constant motion, and related changes in <span class="hlt">core</span> angular momentum are known to cause length-of-day variations of a few milliseconds at decadal time scales. This poster will give an overview of the activities of the SBC. Since its creation in 1998, the SBC has created a web site (www.astro.oma.be/SBC/main.html) as the central mechanism for providing services to the geodynamic community. The web site contains documented model data on <span class="hlt">core</span> flow and <span class="hlt">core</span> angular momentum and an extensive bibliography. In addition, a description is given of the relevant theories and of the dynamical assumptions used for constructing the flow.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1994EOSTr..75R.522.','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1994EOSTr..75R.522."><span><span class="hlt">Core</span> transfer</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p></p> <p></p> <p>Good news for all petroleum geoscientists, mining and environmental scientists, university researchers, and the like: Shell Oil Company has deeded its Midland <span class="hlt">core</span> and sample repository to the Bureau of Economic Geology (BEG) at the University of Texas at Austin. The Midland repository includes more than 1 million linear meters of slab, whole <span class="hlt">core</span>, and prepared cuttings. Data comprising one of the largest U.S. <span class="hlt">core</span> collections—the geologic samples from wells drilled in Texas and 39 other states—are now public data and will be incorporated into the existing BEG database. Both Shell and the University of Texas at Austin are affiliated with the American Geological Institute, which assisted in arranging the transfer as part of its goal to establish a National Geoscience Data Repository System at regional centers across the United States.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/5944891','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/5944891"><span>Method of determining drilling <span class="hlt">fluid</span> invasion</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Vinegar, H. J.; Wellington, S. L.</p> <p>1985-09-10</p> <p>A method of determining the invasion of drilling <span class="hlt">fluid</span> into a <span class="hlt">core</span> sample taken from a borehole. A first material is added to the drilling <span class="hlt">fluid</span> to obtain a first <span class="hlt">fluid</span> that has an effective atomic number that is different than the effective atomic number of the connate <span class="hlt">fluids</span> in the rock formation surrounding the borehole. A preserved <span class="hlt">core</span> sample is collected from the borehole for scanning by a computerized axial tomographic scanner (CAT) to determine the attenuation coefficients at a plurality of points in a cross section of the <span class="hlt">core</span> sample. The preserved <span class="hlt">core</span> sample is scanned with a CAT at first and second energies, and the determined attenuation coefficients for the plurality of points in the cross section at each energy are used to determine an atomic number image for the cross section of the <span class="hlt">core</span> sample. The depth of invasion of the first <span class="hlt">fluid</span> is then determined from the atomic number image, as an indication of the depth of invasion of the drilling <span class="hlt">fluid</span> into the <span class="hlt">core</span> sample.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20150021479','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20150021479"><span><span class="hlt">Fluid</span> Shifts</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Stenger, M.; Hargens, A.; Dulchavsky, S.; Ebert, D.; Lee, S.; Lauriie, S.; Garcia, K.; Sargsyan, A.; Martin, D.; Ribeiro, L.; <a style="text-decoration: none; " href="javascript:void(0); " onClick="displayelement('author_20150021479'); toggleEditAbsImage('author_20150021479_show'); toggleEditAbsImage('author_20150021479_hide'); "> <img style="display:inline; width:12px; height:12px; " src="images/arrow-up.gif" width="12" height="12" border="0" alt="hide" id="author_20150021479_show"> <img style="width:12px; height:12px; display:none; " src="images/arrow-down.gif" width="12" height="12" border="0" alt="hide" id="author_20150021479_hide"></p> <p>2016-01-01</p> <p>NASA is focusing on long-duration missions on the International Space Station (ISS) and future exploration-class missions beyond low-Earth orbit. Visual acuity changes observed after short-duration missions were largely transient, but more than 50% of ISS astronauts experienced more profound, chronic changes with objective structural and functional findings such as papilledema and choroidal folds. Globe flattening, optic nerve sheath dilation, and optic nerve tortuosity also are apparent. This pattern is referred to as the visual impairment and intracranial pressure (VIIP) syndrome. VIIP signs and symptoms, as well as postflight lumbar puncture data, suggest that elevated intracranial pressure (ICP) may be associated with the spaceflight-induced cephalad <span class="hlt">fluid</span> shifts, but this hypothesis has not been tested. The purpose of this study is to characterize <span class="hlt">fluid</span> distribution and compartmentalization associated with long-duration spaceflight, and to correlate these findings with vision changes and other elements of the VIIP syndrome. We also seek to determine whether the magnitude of <span class="hlt">fluid</span> shifts during spaceflight, as well as the VIIP-related effects of those shifts, is predicted by the crewmember's preflight conditions and responses to acute hemodynamic manipulations (such as head-down tilt). Lastly, we will evaluate the patterns of <span class="hlt">fluid</span> distribution in ISS astronauts during acute reversal of <span class="hlt">fluid</span> shifts through application of lower body negative pressure (LBNP) interventions to characterize and explain general and individual responses. METHODS: We will examine a variety of physiologic variables in 10 long-duration ISS crewmembers using the test conditions and timeline presented in the Figure below. Measures include: (1) <span class="hlt">fluid</span> compartmentalization (total body water by D2O, extracellular <span class="hlt">fluid</span> by NaBr, intracellular <span class="hlt">fluid</span> by calculation, plasma volume by CO rebreathe, interstitial <span class="hlt">fluid</span> by calculation); (2) forehead/eyelids, tibia, calcaneus tissue thickness (by</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/6931241','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/6931241"><span>Wellbore <span class="hlt">fluid</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Dorsey, D.L.; Corley, W.T.</p> <p>1983-12-27</p> <p>A clay-based or clay-free aqueous thixotropic wellbore <span class="hlt">fluid</span> having improved <span class="hlt">fluid</span> loss control, desirable flow characteristics and low shale sensitivity for use in drilling a well comprising water or a brine base including an effective amount of an additive comprising a crosslinked potato starch, a heteropolysaccharide derived from a carbohydrate by bacteria of the genus Xanthomonas, and hydroxyethylcellulose or carboxymethylcellulose, is disclosed. This drilling <span class="hlt">fluid</span> has been found to be nondamaging to the formations through which the well is drilled.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li class="active"><span>9</span></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_9 --> <div id="page_10" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li class="active"><span>10</span></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="181"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/22282668','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/22282668"><span><span class="hlt">Fluid</span> inflation</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Chen, X.; Firouzjahi, H.; Namjoo, M.H.; Sasaki, M. E-mail: firouz@ipm.ir E-mail: misao@yukawa.kyoto-u.ac.jp</p> <p>2013-09-01</p> <p>In this work we present an inflationary mechanism based on <span class="hlt">fluid</span> dynamics. Starting with the action for a single barotropic perfect <span class="hlt">fluid</span>, we outline the procedure to calculate the power spectrum and the bispectrum of the curvature perturbation. It is shown that a perfect barotropic <span class="hlt">fluid</span> naturally gives rise to a non-attractor inflationary universe in which the curvature perturbation is not frozen on super-horizon scales. We show that a scale-invariant power spectrum can be obtained with the local non-Gaussianity parameter f{sub NL} = 5/2.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/7014690','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/7014690"><span>Imperfect <span class="hlt">fluids</span> and repulsive gravitation</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Ponce de Leon, J.</p> <p>1987-02-01</p> <p>Imperfect <span class="hlt">fluid</span> sources to the Schwarzschild exterior solution are studied under the assumption that the metric coefficients g/sub 00/ and g/sub 11/ of the interior solution satisfy the relation g/sub 00/ g/sub 11/ = -1. It was found that the <span class="hlt">core</span> of such a distribution is gravitationally repulsive provided the energy density is positive.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/5866392','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/5866392"><span>Workover <span class="hlt">fluid</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Shell, F. J.</p> <p>1985-12-17</p> <p>The high temperature water loss property of alkaline well completion and well workover <span class="hlt">fluids</span> is improved by the addition of an effective amount of a naphthalene sulfonate formaldehyde condensate in the form of its monovalent or bivalent metal salts.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015AGUFMDI41B..04J','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015AGUFMDI41B..04J"><span><span class="hlt">Core</span> layering</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Jacobson, S. A.; Rubie, D. C.; Hernlund, J. W.; Morbidelli, A.</p> <p>2015-12-01</p> <p>We have created a planetary accretion and differentiation model that self-consistently builds and evolves Earth's <span class="hlt">core</span>. From this model, we show that the <span class="hlt">core</span> grows stably stratified as the result of rising metal-silicate equilibration temperatures and pressures, which increases the concentrations of light element impurities into each newer <span class="hlt">core</span> addition. This stable stratification would naturally resist convection and frustrate the onset of a geodynamo, however, late giant impacts could mechanically mix the distinct accreted <span class="hlt">core</span> layers creating large homogenous regions. Within these regions, a geodynamo may operate. From this model, we interpret the difference between the planetary magnetic fields of Earth and Venus as a difference in giant impact histories. Our planetary accretion model is a numerical N-body integration of the Grand Tack scenario [1]—the most successful terrestrial planet formation model to date [2,3]. Then, we take the accretion histories of Earth-like and Venus-like planets from this model and post-process the growth of each terrestrial planet according to a well-tested planetary differentiation model [4,5]. This model fits Earth's mantle by modifying the oxygen content of the pre-cursor planetesimals and embryos as well as the conditions of metal-silicate equilibration. Other non-volatile major, minor and trace elements included in the model are assumed to be in CI chondrite proportions. The results from this model across many simulated terrestrial planet growth histories are robust. If the kinetic energy delivered by larger impacts is neglected, the <span class="hlt">core</span> of each planet grows with a strong stable stratification that would significantly impede convection. However, if giant impact mixing is very efficient or if the impact history delivers large impacts late, than the stable stratification can be removed. [1] Walsh et al. Nature 475 (2011) [2] O'Brien et al. Icarus 223 (2014) [3] Jacobson & Morbidelli PTRSA 372 (2014) [4] Rubie et al. EPSL 301</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20140017004','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20140017004"><span><span class="hlt">Fluid</span> Shifts</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Stenger, M. B.; Hargens, A.; Dulchavsky, S.; Ebert, D.; Lee, S.; Laurie, S.; Garcia, K.; Sargsyan, A.; Martin, D.; Lui, J.; <a style="text-decoration: none; " href="javascript:void(0); " onClick="displayelement('author_20140017004'); toggleEditAbsImage('author_20140017004_show'); toggleEditAbsImage('author_20140017004_hide'); "> <img style="display:inline; width:12px; height:12px; " src="images/arrow-up.gif" width="12" height="12" border="0" alt="hide" id="author_20140017004_show"> <img style="width:12px; height:12px; display:none; " src="images/arrow-down.gif" width="12" height="12" border="0" alt="hide" id="author_20140017004_hide"></p> <p>2015-01-01</p> <p>INTRODUCTION: Mechanisms responsible for the ocular structural and functional changes that characterize the visual impairment and intracranial pressure (ICP) syndrome (VIIP) are unclear, but hypothesized to be secondary to the cephalad <span class="hlt">fluid</span> shift experienced in spaceflight. This study will relate the <span class="hlt">fluid</span> distribution and compartmentalization associated with long-duration spaceflight with VIIP symptoms. We also seek to determine whether the magnitude of <span class="hlt">fluid</span> shifts during spaceflight, as well as the VIIP-related effects of those shifts, can be predicted preflight with acute hemodynamic manipulations, and also if lower body negative pressure (LBNP) can reverse the VIIP effects. METHODS: Physiologic variables will be examined pre-, in- and post-flight in 10 International Space Station crewmembers including: <span class="hlt">fluid</span> compartmentalization (D2O and NaBr dilution); interstitial tissue thickness (ultrasound); vascular dimensions and dynamics (ultrasound and MRI (including cerebrospinal <span class="hlt">fluid</span> pulsatility)); ocular measures (optical coherence tomography, intraocular pressure, ultrasound); and ICP measures (tympanic membrane displacement, otoacoustic emissions). Pre- and post-flight measures will be assessed while upright, supine and during 15 deg head-down tilt (HDT). In-flight measures will occur early and late during 6 or 12 month missions. LBNP will be evaluated as a countermeasure during HDT and during spaceflight. RESULTS: The first two crewmembers are in the preflight testing phase. Preliminary results characterize the acute <span class="hlt">fluid</span> shifts experienced from upright, to supine and HDT postures (increased stroke volume, jugular dimensions and measures of ICP) which are reversed with 25 millimeters Hg LBNP. DISCUSSION: Initial results indicate that acute cephalad <span class="hlt">fluid</span> shifts may be related to VIIP symptoms, but also may be reversible by LBNP. The effect of a chronic <span class="hlt">fluid</span> shift has yet to be evaluated. Learning Objectives: Current spaceflight VIIP research is described</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/41670','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/41670"><span>Electrorheological <span class="hlt">fluids</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Halsey, T.C.; Martin, J.E.</p> <p>1993-10-01</p> <p>An electrorheological <span class="hlt">fluid</span> is a substance whose form changes in the presence of electric fields. Depending on the strength of the field to which it is subjected, an electrorheological <span class="hlt">fluid</span> can run freely like water, ooze like honey or solidify like gelatin. Indeed, the substance can switch from ne state to another within a few milliseconds. Electrorheological <span class="hlt">fluids</span> are easy to make; they consist of microscopic particles suspended in an insulating liquid. Yet they are not ready for most commercial applications. They tend to suffer from a number of problems, including structural weakness as solids, abrasiveness as liquids and chemical breakdown, especially at high temperatures. Automotive engineers could imagine, for instance, constructing an electrorheological clutch. It was also hoped that electrorheological <span class="hlt">fluids</span> would lead to valveless hydraulic systems, in which solidifying <span class="hlt">fluid</span> would shut off flow through a thin section of pipe. Electrorheological <span class="hlt">fluids</span> also offer the possibility of a shock absorber that provides response times of milliseconds and does not require mechanical adjustments. 3 refs.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19930018607','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19930018607"><span><span class="hlt">Fluid</span> Management System (FMS) <span class="hlt">fluid</span> systems overview</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Baird, R. S.</p> <p>1990-01-01</p> <p>Viewgraphs on <span class="hlt">fluid</span> management system (FMS) <span class="hlt">fluid</span> systems overview are presented. Topics addressed include: <span class="hlt">fluid</span> management system description including system requirements (integrated nitrogen system, integrated water system, and integrated waste gas system) and physical description; and <span class="hlt">fluid</span> management system evolution.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/20170894','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/20170894"><span>Symmetry breaking in confined <span class="hlt">fluids</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Ruckenstein, Eli; Berim, Gersh O</p> <p>2010-02-26</p> <p>The recent progress in the theoretical investigation of the symmetry breaking (the existence of a stable state of a system, in which the symmetry is lower than the symmetry of the system itself) for classical and quantum <span class="hlt">fluids</span> is reviewed. The emphasis is on the conditions which cause symmetry breaking in the density distribution for one component <span class="hlt">fluids</span> and binary mixtures confined in a closed nanoslit between identical solid walls. The existing studies have revealed that two kinds of symmetry breaking can occur in such systems. First, a one-dimensional symmetry breaking occurs only in the direction normal to the walls as a <span class="hlt">fluid</span> density profile asymmetric with respect of the middle of the slit and uniform in any direction parallel to the walls. Second, a two-dimensional symmetry breaking occurs in the <span class="hlt">fluid</span> density distribution which is nonuniform in one of the directions parallel to the walls and asymmetrical in the direction normal to the walls. It manifests through liquid bumps and bridges in the <span class="hlt">fluid</span> density distribution. For one component <span class="hlt">fluids</span>, conditions of existence of symmetry breaking are provided in terms of the average <span class="hlt">fluid</span> density, strength of <span class="hlt">fluid</span>-solid interactions, distance at which the solid wall generates a hard <span class="hlt">core</span> repulsion, and temperature. In the case of binary mixtures, the occurrence of symmetry breaking also depends on the composition of the confined mixtures. Copyright 2010 Elsevier B.V. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1175940','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1175940"><span>Apparatus and method for controlling the temperature of the <span class="hlt">core</span> of a super-conducting transformer</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Golner, Thomas; Pleva, Edward; Mehta, Shirish</p> <p>2006-10-10</p> <p>An apparatus for controlling the temperature of a <span class="hlt">core</span> of a transformer is provided that includes a <span class="hlt">core</span>, a shield surrounding the <span class="hlt">core</span>, a cast formed between the <span class="hlt">core</span> and the shield, and tubing positioned on the shield. The cast directs heat from the <span class="hlt">core</span> to the shield and cooling <span class="hlt">fluid</span> is directed through the tubing to cool the shield.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2002AGUFM.G12A1049V','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2002AGUFM.G12A1049V"><span>Multidisciplinary Study of the <span class="hlt">Core</span> and Computation of <span class="hlt">Core</span> Angular Momentum</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>van Hoolst, T.; Dehant, V.</p> <p>2002-12-01</p> <p>In 1998, the IERS established the Global Geophysical <span class="hlt">Fluids</span> Center (GGFC), which consists of eight Special Bureaus for the different geophysical <span class="hlt">fluids</span>. The Special Bureau for the <span class="hlt">Core</span> (SBC) focuses on theoretical modelling and observations related to <span class="hlt">core</span> flow, and on inner <span class="hlt">core</span> - outer <span class="hlt">core</span> - mantle interactions. The <span class="hlt">fluid</span> outer <span class="hlt">core</span> is in constant motion, and related changes in <span class="hlt">core</span> angular momentum are known to cause length-of-day variations of a few milliseconds at decadal time scales. This poster will give an overview of the activities of the SBC. Since its creation in 1998, the SBC has created a web site (www.astro.oma.be/SBC/main.html) as the central mechanism for providing services to the geodynamic community. The web site contains documented model data on <span class="hlt">core</span> flow and <span class="hlt">core</span> angular momentum and an extensive bibliography. In addition, a description is given of the relevant theories and of the dynamical assumptions used for constructing the flow. Reference <span class="hlt">Core</span> Dynamics, structure, and rotation. eds. V. Dehant, K. Creager, S. Karato, S. Zatman, AGU monograph, 2002, in press, and articles therein such as Ponsar, S., Dehant, V., Holme, R., Jault, D., Pais, A., Van Hoolst, T., The <span class="hlt">Core</span> and fluctuations in the Earth's rotation</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/863342','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/863342"><span>Magnetic nuclear <span class="hlt">core</span> restraint and control</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Cooper, Martin H.</p> <p>1979-01-01</p> <p>A lateral restraint and control system for a nuclear reactor <span class="hlt">core</span> adaptable to provide an inherent decrease of <span class="hlt">core</span> reactivity in response to abnormally high reactor coolant <span class="hlt">fluid</span> temperatures. An electromagnet is associated with structure for radially compressing the <span class="hlt">core</span> during normal reactor conditions. A portion of the structures forming a magnetic circuit are composed of ferromagnetic material having a curie temperature corresponding to a selected coolant <span class="hlt">fluid</span> temperature. Upon a selected signal, or inherently upon a preselected rise in coolant temperature, the magnetic force is decreased a given amount sufficient to relieve the compression force so as to allow <span class="hlt">core</span> radial expansion. The expanded <span class="hlt">core</span> configuration provides a decreased reactivity, tending to shut down the nuclear reaction.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/863245','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/863245"><span>Magnetic nuclear <span class="hlt">core</span> restraint and control</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Cooper, Martin H.</p> <p>1978-01-01</p> <p>A lateral restraint and control system for a nuclear reactor <span class="hlt">core</span> adaptable to provide an inherent decrease of <span class="hlt">core</span> reactivity in response to abnormally high reactor coolant <span class="hlt">fluid</span> temperatures. An electromagnet is associated with structure for radially compressing the <span class="hlt">core</span> during normal reactor conditions. A portion of the structures forming a magnetic circuit are composed of ferromagnetic material having a curie temperature corresponding to a selected coolant <span class="hlt">fluid</span> temperature. Upon a selected signal, or inherently upon a preselected rise in coolant temperature, the magnetic force is decreased a given amount sufficient to relieve the compression force so as to allow <span class="hlt">core</span> radial expansion. The expanded <span class="hlt">core</span> configuration provides a decreased reactivity, tending to shut down the nuclear reaction.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19760060658&hterms=mercury+solid&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3Dmercury%2Bsolid','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19760060658&hterms=mercury+solid&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3Dmercury%2Bsolid"><span>Does Mercury have a molten <span class="hlt">core</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Peale, S. J.</p> <p>1976-01-01</p> <p>A feasible nonseismic observational experiment is proposed for determining the existence and extent of a conducting molten <span class="hlt">core</span> within Mercury. This experiment would utilize the effects of a liquid <span class="hlt">core</span> on the dynamics of Mercury's rotation; two necessary conditions for performing it are that the <span class="hlt">core</span> must not follow the mantle's forced librations in longitude but must follow the mantle on the timescale of the 250,000-yr precession. A method is developed by assuming these conditions to be satisfied, and bounds are established on the <span class="hlt">core</span> viscosity for which they are satisfied. It is shown that the value of the ratio of the moment of inertia of the mantle to the largest principal moment of inertia of the entire planet would indicate whether the <span class="hlt">core</span> is most probably solid, partially <span class="hlt">fluid</span>, or entirely <span class="hlt">fluid</span>. Techniques are suggested for determining the unknowns required to compute the necessary ratio.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/10856207','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/10856207"><span>Earth's <span class="hlt">core</span> and the geodynamo</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Buffett</p> <p>2000-06-16</p> <p>Earth's magnetic field is generated by <span class="hlt">fluid</span> motion in the liquid iron <span class="hlt">core</span>. Details of how this occurs are now emerging from numerical simulations that achieve a self-sustaining magnetic field. Early results predict a dominant dipole field outside the <span class="hlt">core</span>, and some models even reproduce magnetic reversals. The simulations also show how different patterns of flow can produce similar external fields. Efforts to distinguish between the various possibilities appeal to observations of the time-dependent behavior of the field. Important constraints will come from geological records of the magnetic field in the past.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1980AmJPh..48..705B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1980AmJPh..48..705B"><span>Discovery of the Earth's <span class="hlt">core</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Brush, Stephen G.</p> <p>1980-09-01</p> <p>In 1896 when Emil Wiechert proposed his model of the Earth with an iron <span class="hlt">core</span> and stony shell, scientists generally believed that the entire earth was a solid as rigid as steel. R. D. Oldham's identification of P and S waves in seismological records allowed him to detect a discontinuity corresponding to a boundary between <span class="hlt">core</span> and shell (mantle) in 1906, and Beno Gutenberg established the depth of this boundary as 2900 km. But failure to detect propagation of S waves through the <span class="hlt">core</span> was not sufficient evidence to persuade seismologists that it is <span class="hlt">fluid</span> (contrary to modern textbook statements). Not until 1926 did Harold Jeffreys refute the arguments for solidity and establish that the <span class="hlt">core</span> is liquid. In 1936 Inge Lehmann discovered the small inner <span class="hlt">core</span>. K. E. Bullen argued, on the basis of plausible assumptions about compressibility and density, that the inner <span class="hlt">core</span> is solid. Attempts to find seismic signals that have passed through the inner <span class="hlt">core</span> as S waves have so far failed (with one possible exception), but analysis of free oscillations provided fairly convincing evidence for its solidity.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20140003756','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20140003756"><span><span class="hlt">Fluid</span> Shifts</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Stenger, Michael; Hargens, A.; Dulchavsky, S.; Ebert, D.; Lee, S.; Sargsyan, A.; Martin, D.; Lui, J.; Macias, B.; Arbeille, P.; <a style="text-decoration: none; " href="javascript:void(0); " onClick="displayelement('author_20140003756'); toggleEditAbsImage('author_20140003756_show'); toggleEditAbsImage('author_20140003756_hide'); "> <img style="display:inline; width:12px; height:12px; " src="images/arrow-up.gif" width="12" height="12" border="0" alt="hide" id="author_20140003756_show"> <img style="width:12px; height:12px; display:none; " src="images/arrow-down.gif" width="12" height="12" border="0" alt="hide" id="author_20140003756_hide"></p> <p>2014-01-01</p> <p>NASA is focusing on long-duration missions on the International Space Station (ISS) and future exploration-class missions beyond low Earth orbit. Visual acuity changes observed after short-duration missions were largely transient, but more than 30% of ISS astronauts experience more profound, chronic changes with objective structural and functional findings such as papilledema and choroidal folds. Globe flattening, optic nerve sheath dilation, and optic nerve tortuosity also are apparent. This pattern is referred to as the visual impairment and intracranial pressure (VIIP) syndrome. VIIP signs and symptoms, as well as postflight lumbar puncture data, suggest that elevated intracranial pressure (ICP) may be associated with the space flight-induced cephalad <span class="hlt">fluid</span> shifts, but this hypothesis has not been tested. The purpose of this study is to characterize <span class="hlt">fluid</span> distribution and compartmentalization associated with long-duration space flight, and to correlate these findings with vision changes and other elements of the VIIP syndrome. We also seek to determine whether the magnitude of <span class="hlt">fluid</span> shifts during space flight, as well as the VIIP-related effects of those shifts, is predicted by the crewmember's pre-flight condition and responses to acute hemodynamic manipulations (such as head-down tilt). Lastly, we will evaluate the patterns of <span class="hlt">fluid</span> distribution in ISS astronauts during acute reversal of <span class="hlt">fluid</span> shifts through application of lower body negative pressure (LBNP) interventions to characterize and explain general and individual responses. We will examine a variety of physiologic variables in 10 long-duration ISS crewmembers using the test conditions and timeline presented in the Figure below. Measures include: (1) <span class="hlt">fluid</span> compartmentalization (total body water by D2O, extracellular <span class="hlt">fluid</span> by NaBr, intracellular <span class="hlt">fluid</span> by calculation, plasma volume by CO rebreathe, interstitial <span class="hlt">fluid</span> by calculation); (2) forehead/eyelids, tibia, calcaneus tissue thickness (by ultrasound</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20160013633','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20160013633"><span><span class="hlt">Fluid</span> Shifts</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Stenger, M. B.; Hargens, A. R.; Dulchavsky, S. A.; Arbeille, P.; Danielson, R. W.; Ebert, D. J.; Garcia, K. M.; Johnston, S. L.; Laurie, S. S.; Lee, S. M. C.; <a style="text-decoration: none; " href="javascript:void(0); " onClick="displayelement('author_20160013633'); toggleEditAbsImage('author_20160013633_show'); toggleEditAbsImage('author_20160013633_hide'); "> <img style="display:inline; width:12px; height:12px; " src="images/arrow-up.gif" width="12" height="12" border="0" alt="hide" id="author_20160013633_show"> <img style="width:12px; height:12px; display:none; " src="images/arrow-down.gif" width="12" height="12" border="0" alt="hide" id="author_20160013633_hide"></p> <p>2017-01-01</p> <p>Introduction. NASA's Human Research Program is focused on addressing health risks associated with long-duration missions on the International Space Station (ISS) and future exploration-class missions beyond low Earth orbit. Visual acuity changes observed after short-duration missions were largely transient, but now more than 50 percent of ISS astronauts have experienced more profound, chronic changes with objective structural findings such as optic disc edema, globe flattening and choroidal folds. These structural and functional changes are referred to as the visual impairment and intracranial pressure (VIIP) syndrome. Development of VIIP symptoms may be related to elevated intracranial pressure (ICP) secondary to spaceflight-induced cephalad <span class="hlt">fluid</span> shifts, but this hypothesis has not been tested. The purpose of this study is to characterize <span class="hlt">fluid</span> distribution and compartmentalization associated with long-duration spaceflight and to determine if a relation exists with vision changes and other elements of the VIIP syndrome. We also seek to determine whether the magnitude of <span class="hlt">fluid</span> shifts during spaceflight, as well as any VIIP-related effects of those shifts, are predicted by the crewmember's pre-flight status and responses to acute hemodynamic manipulations, specifically posture changes and lower body negative pressure. Methods. We will examine a variety of physiologic variables in 10 long-duration ISS crewmembers using the test conditions and timeline presented in the figure below. Measures include: (1) <span class="hlt">fluid</span> compartmentalization (total body water by D2O, extracellular <span class="hlt">fluid</span> by NaBr, intracellular <span class="hlt">fluid</span> by calculation, plasma volume by CO rebreathe, interstitial <span class="hlt">fluid</span> by calculation); (2) forehead/eyelids, tibia, and calcaneus tissue thickness (by ultrasound); (3) vascular dimensions by ultrasound (jugular veins, cerebral and carotid arteries, vertebral arteries and veins, portal vein); (4) vascular dynamics by MRI (head/neck blood flow, cerebrospinal <span class="hlt">fluid</span></p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25208960','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25208960"><span>Guiding principles of <span class="hlt">fluid</span> and volume therapy.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Aditianingsih, Dita; George, Yohanes W H</p> <p>2014-09-01</p> <p><span class="hlt">Fluid</span> therapy is a <span class="hlt">core</span> concept in the management of perioperative and critically ill patients for maintenance of intravascular volume and organ perfusion. Recent evidence regarding the vascular barrier and its role in terms of vascular leakage has led to a new concept for <span class="hlt">fluid</span> administration. The choice of <span class="hlt">fluid</span> used should be based on the <span class="hlt">fluid</span> composition and the underlying pathophysiology of the patient. Avoidance of both hypo- and hypervolaemia is essential when treating circulatory failure. In daily practice, the assessment of individual thresholds in order to optimize cardiac preload and avoid hypovolaemia or deleterious <span class="hlt">fluid</span> overload remains a challenge. Liberal versus restrictive <span class="hlt">fluid</span> management has been challenged by recent evidence, and the ideal approach appears to be goal-directed <span class="hlt">fluid</span> therapy. Copyright © 2014 Elsevier Ltd. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/4021405','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/biblio/4021405"><span>NEUTRONIC REACTOR <span class="hlt">CORE</span> INSTRUMENT</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Mims, L.S.</p> <p>1961-08-22</p> <p>A multi-purpose instrument for measuring neutron flux, coolant flow rate, and coolant temperature in a nuclear reactor is described. The device consists essentially of a hollow thimble containing a heat conducting element protruding from the inner wall, the element containing on its innermost end an amount of fissionsble materinl to function as a heat source when subjected to neutron flux irradiation. Thermocouple type temperature sensing means are placed on the heat conducting element adjacent the fissionable material and at a point spaced therefrom, and at a point on the thimble which is in contact with the coolant <span class="hlt">fluid</span>. The temperature differentials measured between the thermocouples are determinative of the neutron flux, coolant flow, and temperature being measured. The device may be utilized as a probe or may be incorporated in a reactor <span class="hlt">core</span>. (AE C)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19890001054','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19890001054"><span>Earth rotation and <span class="hlt">core</span> topography</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Hager, Bradford H.; Clayton, Robert W.; Spieth, Mary Ann</p> <p>1988-01-01</p> <p>The NASA Geodynamics program has as one of its missions highly accurate monitoring of polar motion, including changes in length of day (LOD). These observations place fundamental constraints on processes occurring in the atmosphere, in the mantle, and in the <span class="hlt">core</span> of the planet. Short-timescale (t less than or approx 1 yr) variations in LOD are mainly the result of interaction between the atmosphere and the solid earth, while variations in LOD on decade timescales result from the exchange of angular momentum between the mantle and the <span class="hlt">fluid</span> <span class="hlt">core</span>. One mechanism for this exchange of angular momentum is through topographic coupling between pressure variations associated with flow in the <span class="hlt">core</span> interacting with topography at the <span class="hlt">core</span>-mantel boundary (CMB). Work done under another NASA grant addressing the origin of long-wavelength geoid anomalies as well as evidence from seismology, resulted in several models of CMB topography. The purpose of work supported by NAG5-819 was to study further the problem of CMB topography, using geodesy, <span class="hlt">fluid</span> mechanics, geomagnetics, and seismology. This is a final report.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li class="active"><span>10</span></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_10 --> <div id="page_11" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li class="active"><span>11</span></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="201"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011PEPI..187....1O','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011PEPI..187....1O"><span>Laboratory experiments on the dynamics of the <span class="hlt">core</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Olson, Peter</p> <p>2011-07-01</p> <p>Many innovative laboratory experiments have been used to investigate the <span class="hlt">fluid</span> dynamics of the Earth's <span class="hlt">core</span>. Experiments with liquid metals and non-metals range from turbulence and waves in the outer <span class="hlt">core</span> to creeping flow in the inner <span class="hlt">core</span>, and include the effects of rotation (steady and variable), thermal and chemical convection, spherical geometry, magnetic fields, melting and solidification. In this review, the strengths and limitations of laboratory <span class="hlt">fluid</span> experiments are analyzed by comparing their dynamical similarity with the corresponding geophysical processes in the <span class="hlt">core</span>. Recent advances in several areas are highlighted, including variable rotation dynamics, convection in liquid metals, the effects of magnetic fields on <span class="hlt">fluid</span> motions, experimental dynamos, flow in the solid inner <span class="hlt">core</span>, and metal-silicate interactions during <span class="hlt">core</span> formation.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011PEPI..187..139O','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011PEPI..187..139O"><span>Laboratory Experiments on the Dynamics of the <span class="hlt">Core</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Olson, Peter</p> <p>2011-08-01</p> <p>Many innovative laboratory experiments have been used to investigate the <span class="hlt">fluid</span> dynamics of the Earth's <span class="hlt">core</span>. Experiments with liquid metals and non-metals range from turbulence and waves in the outer <span class="hlt">core</span> to creeping flow in the inner <span class="hlt">core</span>, and include the effects of rotation (steady and variable), thermal and chemical convection, spherical geometry, magnetic fields, melting and solidification. In this review, the strengths and limitations of laboratory <span class="hlt">fluid</span> experiments are analyzed by comparing their dynamical similarity with the corresponding geophysical processes in the <span class="hlt">core</span>. Recent advances in several areas are highlighted, including variable rotation dynamics, convection in liquid metals, the effects of magnetic fields on <span class="hlt">fluid</span> motions, experimental dynamos, flow in the solid inner <span class="hlt">core</span>, and metal-silicate interactions during <span class="hlt">core</span> formation.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1997flme.book.....P','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1997flme.book.....P"><span><span class="hlt">Fluid</span> Mechanics</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Pnueli, David; Gutfinger, Chaim</p> <p>1997-01-01</p> <p>This text is intended for the study of <span class="hlt">fluid</span> mechanics at an intermediate level. The presentation starts with basic concepts, in order to form a sound conceptual structure that can support engineering applications and encourage further learning. The presentation is exact, incorporating both the mathematics involved and the physics needed to understand the various phenomena in <span class="hlt">fluid</span> mechanics. Where a didactical choice must be made between the two, the physics prevails. Throughout the book the authors have tried to reach a balance between exact presentation, intuitive grasp of new ideas, and creative applications of concepts. This approach is reflected in the examples presented in the text and in the exercises given at the end of each chapter. Subjects treated are hydrostatics, viscous flow, similitude and order of magnitude, creeping flow, potential flow, boundary layer flow, turbulent flow, compressible flow, and non-Newtonian flows. This book is ideal for advanced undergraduate students in mechanical, chemical, aerospace, and civil engineering. Solutions manual available.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/872573','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/872573"><span><span class="hlt">Fluid</span> extraction</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Wai, Chien M.; Laintz, Kenneth E.</p> <p>1999-01-01</p> <p>A method of extracting metalloid and metal species from a solid or liquid material by exposing the material to a supercritical <span class="hlt">fluid</span> solvent containing a chelating agent is described. The chelating agent forms chelates that are soluble in the supercritical <span class="hlt">fluid</span> to allow removal of the species from the material. In preferred embodiments, the extraction solvent is supercritical carbon dioxide and the chelating agent is a fluorinated .beta.-diketone. In especially preferred embodiments the extraction solvent is supercritical carbon dioxide, and the chelating agent comprises a fluorinated .beta.-diketone and a trialkyl phosphate, or a fluorinated .beta.-diketone and a trialkylphosphine oxide. Although a trialkyl phosphate can extract lanthanides and actinides from acidic solutions, a binary mixture comprising a fluorinated .beta.-diketone and a trialkyl phosphate or a trialkylphosphine oxide tends to enhance the extraction efficiencies for actinides and lanthanides. The method provides an environmentally benign process for removing contaminants from industrial waste without using acids or biologically harmful solvents. The method is particularly useful for extracting actinides and lanthanides from acidic solutions. The chelate and supercritical <span class="hlt">fluid</span> can be regenerated, and the contaminant species recovered, to provide an economic, efficient process.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19780018920&hterms=Reactors+production+hydrogen&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3DReactors%2Bproduction%2Bhydrogen','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19780018920&hterms=Reactors+production+hydrogen&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3DReactors%2Bproduction%2Bhydrogen"><span>Plasma <span class="hlt">core</span> reactor applications</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Latham, T. S.; Rodgers, R. J.</p> <p>1976-01-01</p> <p>Analytical and experimental investigations were conducted to demonstrate the feasibility of fissioning uranium plasma <span class="hlt">core</span> reactors and to characterize space and terrestrial applications for such reactors. Uranium hexafluoride fuel is injected into <span class="hlt">core</span> cavities and confined away from the surface by argon buffer gas injected tangentially from the peripheral walls. Radiant heat transfer calculations were performed for a six-cavity reactor configuration. Axial working <span class="hlt">fluid</span> channels are located along a fraction of each cavity peripheral wall. Results of calculations for outward-directed radiant energy fluxes corresponding to radiating temperatures of 2000 to 5000 K indicate total operating pressures from 80 to 650 atm, centerline temperatures from 6900 to 30,000 K, and total radiated powers from 25 to 2500 MW, respectively. Applications are described for this type of reactor such as (1) high-thrust, high specific impulse space propulsion, (2) highly efficient systems for generation of electricity, and (3) hydrogen or synthetic fuel production systems using the intense radiant energy fluxes.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19780018920&hterms=uranium+hexafluoride&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3Duranium%2Bhexafluoride','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19780018920&hterms=uranium+hexafluoride&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3Duranium%2Bhexafluoride"><span>Plasma <span class="hlt">core</span> reactor applications</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Latham, T. S.; Rodgers, R. J.</p> <p>1976-01-01</p> <p>Analytical and experimental investigations were conducted to demonstrate the feasibility of fissioning uranium plasma <span class="hlt">core</span> reactors and to characterize space and terrestrial applications for such reactors. Uranium hexafluoride fuel is injected into <span class="hlt">core</span> cavities and confined away from the surface by argon buffer gas injected tangentially from the peripheral walls. Radiant heat transfer calculations were performed for a six-cavity reactor configuration. Axial working <span class="hlt">fluid</span> channels are located along a fraction of each cavity peripheral wall. Results of calculations for outward-directed radiant energy fluxes corresponding to radiating temperatures of 2000 to 5000 K indicate total operating pressures from 80 to 650 atm, centerline temperatures from 6900 to 30,000 K, and total radiated powers from 25 to 2500 MW, respectively. Applications are described for this type of reactor such as (1) high-thrust, high specific impulse space propulsion, (2) highly efficient systems for generation of electricity, and (3) hydrogen or synthetic fuel production systems using the intense radiant energy fluxes.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/7200360','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/7200360"><span>A laboratory evaluation of <span class="hlt">core</span> preservation materials</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Auman, J.B.</p> <p>1986-01-01</p> <p>This paper documents the results of a laboratory study of the effectiveness of available state-of-the-art <span class="hlt">core</span> preservation materials. The ability of the <span class="hlt">core</span> sealing material to prevent post-preservation changes in <span class="hlt">fluid</span> saturations may have a profound effect on subsequent laboratory measurements. Native-state (oil-cut) <span class="hlt">cores</span> are often considered the best source of certain in-situ reservoir properties. Employing <span class="hlt">fluid</span> saturations or relative permeability data from a <span class="hlt">core</span> of this type, that has been altered due to the <span class="hlt">core</span> drying out before measurements can be made, can significantly alter the results of a reservoir engineering study or simulation. Considering the expense involved in obtaining, storing and analyzing a native-state <span class="hlt">core</span>, and the purpose for which it was cut, knowing exactly what materials can adequately preserve a <span class="hlt">core</span> until laboratory measurements are made is critical and should not be overlooked. In this laboratory study, saturated Berea Sandstone <span class="hlt">core</span> plugs were preserved in a number of commonly employed sealing materials. The sealed plugs were then stored in a humidity controlled environment and periodically weighed to ascertain the degree of change that had occurred in the saturation of the plug. In addition, this paper discusses and suggests procedures for applying recommended sealing materials.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/372353','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/372353"><span><span class="hlt">Fluid</span>-loss control for high-permeability rocks in hydraulic fracturing under realistic shear conditions</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Navarrete, R.C.; Mitchell, J.P.</p> <p>1995-12-31</p> <p>A study is presented on the effectiveness of different combinations of <span class="hlt">fluid</span> and <span class="hlt">fluid</span>-loss additives to control <span class="hlt">fluid</span> loss in high-permeability formations under high shear rates. The impact on matrix damage and proppant-pack damage is also studied. Borate-crosslinked guars, hydroxyethylcellulose (HEC) and a surfactant water-base gravel packing <span class="hlt">fluid</span> were investigated. The <span class="hlt">fluid</span>-loss additive considered was silica flour. All <span class="hlt">fluid</span>-loss tests were run in dynamic <span class="hlt">fluid</span>-loss cells. To properly test high-permeability <span class="hlt">cores</span>, new long <span class="hlt">core</span> dynamic <span class="hlt">fluid</span>-loss cells were used. The matrix damage caused by the invasion of the <span class="hlt">fluid</span> was determined using pressure taps along the <span class="hlt">core</span>. Conductivity tests were also run to determine the damage to the proppant pack. Results show that the effectiveness of particulate <span class="hlt">fluid</span>-loss additives under dynamic conditions is strongly dependent on the initial leakoff rate, which depends on the pressure gradient across the <span class="hlt">core</span>, permeability of the <span class="hlt">core</span> and viscosity of the invading <span class="hlt">fluid</span>. The use of silica flour helps matrix flowback, and it has a minimal effect on proppant-pack conductivity in clean <span class="hlt">fluids</span> (e.g., surfactant water-base gravel packing <span class="hlt">fluid</span>). With the exception of the borate-crosslinked guar with no <span class="hlt">fluid</span>-loss additive, the variety of <span class="hlt">fluids</span> used in these tests (with and without silica flour) have a negligible effect on postproduction.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/5701122','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/5701122"><span>Drilling <span class="hlt">fluid</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Russell, J.A.; Patel, B.B.</p> <p>1987-11-03</p> <p>A drilling <span class="hlt">fluid</span> additive mixture is described consisting essentially of a sulfoalkylated tannin in admixture with a non-sulfoalkylated alkali-solubilized lignite wherein the weight ratio of the sulfoalkylated tannin to the non-sulfoalkylated lignite is in the range from about 2:1 to about 1:1. The sulfoalkylated tannin has been sulfoalkylated with at least one -(C(R-)/sub 2/-SO/sub 3/M side chain, wherein each R is selected from the group consisting of hydrogen and alkyl radicals containing from 1 to about 5 carbon atoms, and M is selected from the group consisting of ammonium and the alkali metals.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011PhFl...23b1301G','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011PhFl...23b1301G"><span>Respiratory <span class="hlt">fluid</span> mechanics</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Grotberg, James B.</p> <p>2011-02-01</p> <p>This article covers several aspects of respiratory <span class="hlt">fluid</span> mechanics that have been actively investigated by our group over the years. For the most part, the topics involve two-phase flows in the respiratory system with applications to normal and diseased lungs, as well as therapeutic interventions. Specifically, the topics include liquid plug flow in airways and at airway bifurcations as it relates to surfactant, drug, gene, or stem cell delivery into the lung; liquid plug rupture and its damaging effects on underlying airway epithelial cells as well as a source of crackling sounds in the lung; airway closure from "capillary-elastic instabilities," as well as nonlinear stabilization from oscillatory <span class="hlt">core</span> flow which we call the "oscillating butter knife;" liquid film, and surfactant dynamics in an oscillating alveolus and the steady streaming, and surfactant spreading on thin viscous films including our discovery of the Grotberg-Borgas-Gaver shock.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3055904','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3055904"><span>Respiratory <span class="hlt">fluid</span> mechanics</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Grotberg, James B.</p> <p>2011-01-01</p> <p>This article covers several aspects of respiratory <span class="hlt">fluid</span> mechanics that have been actively investigated by our group over the years. For the most part, the topics involve two-phase flows in the respiratory system with applications to normal and diseased lungs, as well as therapeutic interventions. Specifically, the topics include liquid plug flow in airways and at airway bifurcations as it relates to surfactant, drug, gene, or stem cell delivery into the lung; liquid plug rupture and its damaging effects on underlying airway epithelial cells as well as a source of crackling sounds in the lung; airway closure from “capillary-elastic instabilities,” as well as nonlinear stabilization from oscillatory <span class="hlt">core</span> flow which we call the “oscillating butter knife;” liquid film, and surfactant dynamics in an oscillating alveolus and the steady streaming, and surfactant spreading on thin viscous films including our discovery of the Grotberg–Borgas–Gaver shock. PMID:21403768</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1987EOSTr..68.1666B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1987EOSTr..68.1666B"><span>Geophysical <span class="hlt">Fluid</span> Dynamics</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Busse, F. H.</p> <p></p> <p>In the past 8 years, since Pedlosky's book was first published, it has found a well established place in the literature of dynamical meteorology and physical oceanography. Geophysicists less familiar with these fields may need to be reminded that the subject of geophysical <span class="hlt">fluid</span> dynamics, in the narrow definition used in the title of the book, refers to the theory of the large-scale motions of the atmosphere and the oceans. Topics such as thermal convection in the atmosphere or in Earth's mantle and <span class="hlt">core</span> are not treated in this book, and the reader will search in vain for a discussion of atmospheric or oceanic tides. The theory of quasi-geostrophic flow is described comprehensively, however, and its major applications to problems of atmospheric and oceanic circulations are considered in detail.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/21403768','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/21403768"><span>Respiratory <span class="hlt">fluid</span> mechanics.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Grotberg, James B</p> <p>2011-02-01</p> <p>This article covers several aspects of respiratory <span class="hlt">fluid</span> mechanics that have been actively investigated by our group over the years. For the most part, the topics involve two-phase flows in the respiratory system with applications to normal and diseased lungs, as well as therapeutic interventions. Specifically, the topics include liquid plug flow in airways and at airway bifurcations as it relates to surfactant, drug, gene, or stem cell delivery into the lung; liquid plug rupture and its damaging effects on underlying airway epithelial cells as well as a source of crackling sounds in the lung; airway closure from "capillary-elastic instabilities," as well as nonlinear stabilization from oscillatory <span class="hlt">core</span> flow which we call the "oscillating butter knife;" liquid film, and surfactant dynamics in an oscillating alveolus and the steady streaming, and surfactant spreading on thin viscous films including our discovery of the Grotberg-Borgas-Gaver shock.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=20040129571&hterms=Seismology&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D50%26Ntt%3DSeismology','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=20040129571&hterms=Seismology&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D50%26Ntt%3DSeismology"><span>Magnetic Probing of <span class="hlt">Core</span> Geodynamics</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Voorhies, Coerte V.</p> <p>2004-01-01</p> <p>To better understand geomagnetic theory and observation, we can use spatial magnetic spectra for the main field and secular variation to test <span class="hlt">core</span> dynmcal hypotheses against seismology. The hypotheses lead to theoretical spectra which are fitted to observational spectra. Each fit yields an estimate of the radius of Earth's <span class="hlt">core</span> and uncertainty. If this agrees with the seismologic value, then the hypothes pass the test. A new way to obtain theoretical spectra extends the hydromagnetic scale analysis of Benton to scale-variant field and flow. For narrow scale flow and a dynamically weak field by the top of Earth's <span class="hlt">core</span>, this yields a generalized Stevenson-McLeod spectrum for the <span class="hlt">core</span>-source field, and a secular variation spectrum modulated by a cubic polynomial in spherical harmonic degree n. The former passes the tests. The latter passes many tests, but does not describe rapid dipole decline and quadrupole rebound; some tests suggest it is a bit hard, or rich in narrow scale change. In a <span class="hlt">core</span> geodynamo, motion of the <span class="hlt">fluid</span> conductor does work against the Lorentz force. This converts kinetic into magnetic energy which, in turn, is lost to heat via Ohmic dissipation. In the analysis at lentgh-scale l/k, if one presumes kinetic energy is converted in either eddy- overturning or magnetic free-decay time-scales, then Kolmogorov or other spectra in conflict with observational spectra can result. Instead, the rate work is done roughly balances the dissipation rate, which is consistent with small scale flow. The conversion time-scale depends on dynamical constraints. These are summarized by the magneto-geostrophic vertical vorticity balance by the top of the <span class="hlt">core</span>, which includes anisotropic effects of rotation, the magnetic field, and the <span class="hlt">core</span>- mantle boundary. The resulting theoretical spectra for the <span class="hlt">core</span>-source field and its SV are far more compatible with observation. The conversion time-scale of order l20 years is pseudo-scale-invarient. Magnetic spectra of other</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=20040105585&hterms=Seismology&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D50%26Ntt%3DSeismology','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=20040105585&hterms=Seismology&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D50%26Ntt%3DSeismology"><span>Magnetic Probing of <span class="hlt">Core</span> Geodynamics</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Voorhies, Coerte V.</p> <p>2004-01-01</p> <p>To better understand geomagnetic theory and observation, we can use spatial magnetic spectra for the main field and secular variation to test <span class="hlt">core</span> dynamical hypotheses against seismology. The hypotheses lead to theoretical spectra which are fitted to observational spectra. Each fit yields an estimate of the radius of Earth's <span class="hlt">core</span> and uncertainty. If this agrees with the seismologic value, then the hypothesis passes the test. A new way to obtain theoretical spectra extends the hydromagnetic scale analysis of Benton to scale-variant field and flow. For narrow scale flow and a dynamically weak field by the top of Earth's <span class="hlt">core</span>, this yields a generalized Stevenson-McLeod spectrum for the <span class="hlt">core</span>-source field, and a secular variation spectrum modulated by a cubic polynomial in spherical harmonic degree n. The former passes the tests. The latter passes many tests, but does not describe rapid dipole decline and quadrupole rebound; some tests suggest it is a bit hard, or rich in narrow scale range. In a <span class="hlt">core</span> geodynamo, motion of the <span class="hlt">fluid</span> conductor does work against the Lorentz force. This converts kinetic into magnetic energy which, in turn, is lost to heat via Ohmic dissipation. In the analysis at length-scale 1/k, if one presumes kinetic energy is converted in either eddy-overturning or magnetic free-decay time-scales, then Kolmogorov or other spectra in conflict with observational spectra can result. Instead, the rate work is done roughly balances the dissipation rate, which is consistent with small-scale flow. The conversion time-scale depends on dynamical constraints. These are summarized by the magnetogeostrophic vertical vorticity balance by the top of the <span class="hlt">core</span>, which includes anisotropic effects of rotation, the magnetic field, and the <span class="hlt">core</span>-mantle boundary. The resulting theoretical spectra for the <span class="hlt">core</span>-source field and its SV are far more compatible with observation. The conversion time-scale of order 120 years is pseudo-scale-invariant. Magnetic spectra of other</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2004AGUSMGP33A..06V','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2004AGUSMGP33A..06V"><span>Magnetic Probing of <span class="hlt">Core</span> Geodynamics</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Voorhies, C. V.</p> <p>2004-05-01</p> <p>To better understand geomagnetic theory and observation, we can use spatial magnetic spectra for the main field and secular variation to test <span class="hlt">core</span> dynamical hypotheses against seismology. The hypotheses lead to theoretical spectra which are fitted to observational spectra. Each fit yields an estimate of the radius of Earth's <span class="hlt">core</span> and uncertainty. If this agrees with the seismologic value, then the hypotheses pass the test. A new way to obtain theoretical spectra extends the hydromagnetic scale analysis of Benton [1992; GAFD] to scale-variant field and flow [Voorhies, 2004; JGR-SE, in press]. For narrow scale flow and a dynamically weak field by the top of Earth's <span class="hlt">core</span>, this yields a generalized Stevenson-McLeod spectrum for the <span class="hlt">core</span>-source field [Voorhies, Sabaka and Purucker, 2002; JGR-P], and a secular variation spectrum modulated by a cubic polynomial in spherical harmonic degree n. The former passes the tests. The latter passes many tests, but does not describe rapid dipole decline and quadrupole rebound; some tests suggest it is a bit hard, or rich in narrow scale change. In a <span class="hlt">core</span> geodynamo, motion of the <span class="hlt">fluid</span> conductor does work against the Lorentz force. This converts kinetic into magnetic energy which, in turn, is lost to heat via Ohmic dissipation. In the analysis at length-scale 1/k, if one presumes kinetic energy is converted in either eddy-overturning or magnetic free-decay time-scales, then Kolmogorov or other spectra in conflict with observational spectra can result. Instead, the rate work is done roughly balances the dissipation rate, which is consistent with small scale flow. The conversion time-scale depends on dynamical constraints. These are summarized by the magneto-geostrophic vertical vorticity balance by the top of the <span class="hlt">core</span>, which includes anisotropic effects of rotation, the magnetic field, and the <span class="hlt">core</span>-mantle boundary. The resulting theoretical spectra for the <span class="hlt">core</span>-source field and its SV are far more compatible with observation. The</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=20040105585&hterms=Seismology&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D40%26Ntt%3DSeismology','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=20040105585&hterms=Seismology&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D40%26Ntt%3DSeismology"><span>Magnetic Probing of <span class="hlt">Core</span> Geodynamics</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Voorhies, Coerte V.</p> <p>2004-01-01</p> <p>To better understand geomagnetic theory and observation, we can use spatial magnetic spectra for the main field and secular variation to test <span class="hlt">core</span> dynamical hypotheses against seismology. The hypotheses lead to theoretical spectra which are fitted to observational spectra. Each fit yields an estimate of the radius of Earth's <span class="hlt">core</span> and uncertainty. If this agrees with the seismologic value, then the hypothesis passes the test. A new way to obtain theoretical spectra extends the hydromagnetic scale analysis of Benton to scale-variant field and flow. For narrow scale flow and a dynamically weak field by the top of Earth's <span class="hlt">core</span>, this yields a generalized Stevenson-McLeod spectrum for the <span class="hlt">core</span>-source field, and a secular variation spectrum modulated by a cubic polynomial in spherical harmonic degree n. The former passes the tests. The latter passes many tests, but does not describe rapid dipole decline and quadrupole rebound; some tests suggest it is a bit hard, or rich in narrow scale range. In a <span class="hlt">core</span> geodynamo, motion of the <span class="hlt">fluid</span> conductor does work against the Lorentz force. This converts kinetic into magnetic energy which, in turn, is lost to heat via Ohmic dissipation. In the analysis at length-scale 1/k, if one presumes kinetic energy is converted in either eddy-overturning or magnetic free-decay time-scales, then Kolmogorov or other spectra in conflict with observational spectra can result. Instead, the rate work is done roughly balances the dissipation rate, which is consistent with small-scale flow. The conversion time-scale depends on dynamical constraints. These are summarized by the magnetogeostrophic vertical vorticity balance by the top of the <span class="hlt">core</span>, which includes anisotropic effects of rotation, the magnetic field, and the <span class="hlt">core</span>-mantle boundary. The resulting theoretical spectra for the <span class="hlt">core</span>-source field and its SV are far more compatible with observation. The conversion time-scale of order 120 years is pseudo-scale-invariant. Magnetic spectra of other</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=20040129571&hterms=Seismology&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D40%26Ntt%3DSeismology','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=20040129571&hterms=Seismology&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D40%26Ntt%3DSeismology"><span>Magnetic Probing of <span class="hlt">Core</span> Geodynamics</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Voorhies, Coerte V.</p> <p>2004-01-01</p> <p>To better understand geomagnetic theory and observation, we can use spatial magnetic spectra for the main field and secular variation to test <span class="hlt">core</span> dynmcal hypotheses against seismology. The hypotheses lead to theoretical spectra which are fitted to observational spectra. Each fit yields an estimate of the radius of Earth's <span class="hlt">core</span> and uncertainty. If this agrees with the seismologic value, then the hypothes pass the test. A new way to obtain theoretical spectra extends the hydromagnetic scale analysis of Benton to scale-variant field and flow. For narrow scale flow and a dynamically weak field by the top of Earth's <span class="hlt">core</span>, this yields a generalized Stevenson-McLeod spectrum for the <span class="hlt">core</span>-source field, and a secular variation spectrum modulated by a cubic polynomial in spherical harmonic degree n. The former passes the tests. The latter passes many tests, but does not describe rapid dipole decline and quadrupole rebound; some tests suggest it is a bit hard, or rich in narrow scale change. In a <span class="hlt">core</span> geodynamo, motion of the <span class="hlt">fluid</span> conductor does work against the Lorentz force. This converts kinetic into magnetic energy which, in turn, is lost to heat via Ohmic dissipation. In the analysis at lentgh-scale l/k, if one presumes kinetic energy is converted in either eddy- overturning or magnetic free-decay time-scales, then Kolmogorov or other spectra in conflict with observational spectra can result. Instead, the rate work is done roughly balances the dissipation rate, which is consistent with small scale flow. The conversion time-scale depends on dynamical constraints. These are summarized by the magneto-geostrophic vertical vorticity balance by the top of the <span class="hlt">core</span>, which includes anisotropic effects of rotation, the magnetic field, and the <span class="hlt">core</span>- mantle boundary. The resulting theoretical spectra for the <span class="hlt">core</span>-source field and its SV are far more compatible with observation. The conversion time-scale of order l20 years is pseudo-scale-invarient. Magnetic spectra of other</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/372347','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/372347"><span>Effectiveness of <span class="hlt">fluid</span> loss additives in laboratory dynamic <span class="hlt">fluid</span> loss experiments</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Charles, D.D.; Xie, X.</p> <p>1995-12-31</p> <p>A commercially available HTHP (high temperature, high pressure) dynamic filtration unit and a widely available HTHP rheometer was used to study dynamic <span class="hlt">fluid</span>-loss behavior of uncrosslinked hydroxypropyl guar hydraulic fracturing <span class="hlt">fluid</span> containing varying concentrations of silica flour, starch, and diesel. New dimensionless groups were defined for the dynamic <span class="hlt">fluid</span>-loss problem. These groups were used first to effectively correlate previously reported laboratory data and later were employed to analyze the ensuing experimental data. Results demonstrate that low and high permeability <span class="hlt">cores</span> require different mechanisms for <span class="hlt">fluid</span>-loss control and that, compared to silica flour, starch may lose its effectiveness at higher concentrations.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/6898975','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/6898975"><span>Gyroelastic <span class="hlt">fluids</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Kerbel, G.D.</p> <p>1981-01-20</p> <p>A study is made of a scale model in three dimensions of a guiding center plasma within the purview of gyroelastic (also known as finite gyroradius-near theta pinch) magnetohydrodynamics. The (nonlinear) system sustains a particular symmetry called isorrhopy which permits the decoupling of <span class="hlt">fluid</span> modes from drift modes. Isorrhopic equilibria are analyzed within the framework of geometrical optics resulting in (local) dispersion relations and ray constants. A general scheme is developed to evolve an arbitrary linear perturbation of a screwpinch equilibrium as an invertible integral transform (over the complete set of generalized eigenfunctions defined naturally by the equilibrium). Details of the structure of the function space and the associated spectra are elucidated. Features of the (global) dispersion relation owing to the presence of gyroelastic stabilization are revealed. An energy principle is developed to study the stability of the tubular screwpinch.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li class="active"><span>11</span></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_11 --> <div id="page_12" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li class="active"><span>12</span></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="221"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015EGUGA..1714597R','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015EGUGA..1714597R"><span>Mercury's thermal evolution and <span class="hlt">core</span> crystallization regime</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Rivoldini, Attilio; Dumberry, Mathieu; Van Hoolst, Tim; Steinle-Neumann, Gerd</p> <p>2015-04-01</p> <p>Unlike the Earth, where the liquid <span class="hlt">core</span> isentrope is less steep than the <span class="hlt">core</span> melting temperature, at the lower pressures inside Mercury's <span class="hlt">core</span> the isentrope can be steepper than the melting temperature. As a consequence, upon cooling, the isentrope may first cross the melting temperature near the <span class="hlt">core</span> mantle boundary and produce iron-rich snow that sinks under gravity and produces buoyant upwellings of iron depleted <span class="hlt">fluid</span>. Similar to bottom up crystallization, top down crystallization is expected to generate sufficient buoyancy flux to drive magnetic field generation by compositional convection. In this study we model Mercury's thermal evolution by taking into account the formation of iron-rich snow to assess when the conditions for internally magnetic field can be satisfied. We employ a thermodynamic consistent description of the iron high pressure phase diagram and thermoelastic properties of iron alloys as well as the most recent data about the thermal conductivity of <span class="hlt">core</span> materials.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1994PhDT.......177H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1994PhDT.......177H"><span>Two-<span class="hlt">Fluid</span> Pipe Flow.</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Huang, Yadong</p> <p></p> <p>The study of two-<span class="hlt">fluid</span> pipe flow was largely inspired by the potential application of using less viscous <span class="hlt">fluid</span> to lubricate very viscous <span class="hlt">fluids</span> such as heavy crude oil in oil transporting system. In this thesis, starting from the basic assumptions and mathematical formations of the governing equations for general two-phase flows, we first discuss the simple steady solutions of two immiscible <span class="hlt">fluids</span> flowing coaxially in a pipe. There are basically two types of solutions, one is the stratified solution, and the other is the <span class="hlt">core</span>-annular solution, in which the viscous phase stays in the center while the less viscous phase forms an annular around it. This solution is favored from the perspective of lubricated pipelining. The numerical results of the linear stability analysis of these solutions are then obtained using a finite element approximation with an iterative eigenvalue solver for the large matrices generated by the approximation. The <span class="hlt">core</span>-annular flow configuration is, in general unstable due to capillarity, interfacial friction force and Reynolds stress or the combination of the three. In most of the industrial practices, the Reynolds number is so high that the flow of the less viscous phase is turbulent. For these cases we apply a k - epsilon turbulence model to the less viscous phase while assume the viscous <span class="hlt">core</span> is still laminar and solve for the steady solution. The friction factor, which measures the drag in a pipe system, and the holdup ratio are computed for typical cases. The results are compared with available experimental data and the agreement is rather good.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19760057994&hterms=geology+core&qs=N%3D0%26Ntk%3DAll%26Ntx%3Dmode%2Bmatchall%26Ntt%3Dgeology%2Bcore','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19760057994&hterms=geology+core&qs=N%3D0%26Ntk%3DAll%26Ntx%3Dmode%2Bmatchall%26Ntt%3Dgeology%2Bcore"><span>Some aspects of <span class="hlt">core</span> formation in Mercury</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Solomon, S. C.</p> <p>1976-01-01</p> <p>Some questions dealing with the nature and history of a large metallic <span class="hlt">core</span> within Mercury are considered. These include the existence of a <span class="hlt">core</span>, its size, whether it is <span class="hlt">fluid</span> or solid, the timescale for <span class="hlt">core</span> formation, the geological consequences of <span class="hlt">core</span> formation, and whether such consequences are consistent with the surface geology. Several indirect lines of evidence are discussed which suggest the presence of a large iron-rich <span class="hlt">core</span>. A <span class="hlt">core</span>-formation model is examined in which <span class="hlt">core</span> infall is accompanied by an increase of 17 km in planetary radius, an increase of 700 K in mean internal temperature, and substantial melting of the mantle. It is argued that if the <span class="hlt">core</span> differentiated from an originally homogeneous planet, that event must have predated the oldest geological units comprising most of the planetary surface. A convective dynamo model for the source of Mercury's magnetic field is shown to conflict with cosmochemical models that do not predict a substantial radiogenic heat source in the <span class="hlt">core</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19760057994&hterms=mercury+solid&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3Dmercury%2Bsolid','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19760057994&hterms=mercury+solid&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3Dmercury%2Bsolid"><span>Some aspects of <span class="hlt">core</span> formation in Mercury</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Solomon, S. C.</p> <p>1976-01-01</p> <p>Some questions dealing with the nature and history of a large metallic <span class="hlt">core</span> within Mercury are considered. These include the existence of a <span class="hlt">core</span>, its size, whether it is <span class="hlt">fluid</span> or solid, the timescale for <span class="hlt">core</span> formation, the geological consequences of <span class="hlt">core</span> formation, and whether such consequences are consistent with the surface geology. Several indirect lines of evidence are discussed which suggest the presence of a large iron-rich <span class="hlt">core</span>. A <span class="hlt">core</span>-formation model is examined in which <span class="hlt">core</span> infall is accompanied by an increase of 17 km in planetary radius, an increase of 700 K in mean internal temperature, and substantial melting of the mantle. It is argued that if the <span class="hlt">core</span> differentiated from an originally homogeneous planet, that event must have predated the oldest geological units comprising most of the planetary surface. A convective dynamo model for the source of Mercury's magnetic field is shown to conflict with cosmochemical models that do not predict a substantial radiogenic heat source in the <span class="hlt">core</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=20040079717&hterms=Seismology&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D50%26Ntt%3DSeismology','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=20040079717&hterms=Seismology&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D50%26Ntt%3DSeismology"><span>Magnectic Probing of <span class="hlt">Core</span> Geodynamics</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Voorhies, Coerte</p> <p>2004-01-01</p> <p>To better understand geomagnetic theory and observation, we can use spatial magnetic spectra for the main field and secular variation to test <span class="hlt">core</span> dynamical hypotheses against seismology. The hypotheses lead to theoretical spectra which are fitted to observational spectra. Each fit yields an estimate of the radius of Earth s <span class="hlt">core</span> and uncertainty. If this agrees with the seismologic value, then the hypotheses pass the test. A new way to obtain theoretical spectra extends the hydromagnetic scale analysis of Benton to scale-variant field and flow. For narrow scale flow and a dynamically weak field by the top of Earth s <span class="hlt">core</span>, this yields a JGR-PI, and a secular variation spectrum modulated by a cubic polynomial in spherical harmonic degree n. The former passes the tests. The latter passes many tests, but does not describe rapid dipole decline and quadrupole rebound; some tests suggest it is a bit hard, or rich in narrow scale change.In a <span class="hlt">core</span> geodynamo, motion of the <span class="hlt">fluid</span> conductor does work against the Lorentz force. This converts kinetic into magnetic energy which, in turn, is lost to heat via Ohmic dissipation. In the analysis at length- scale l/k, if one presumes kinetic energy is converted in either eddy- overturning or magnetic free-decay time-scales, then Kolmogorov or other spectra in conflict with observational spectra can result. Instead, the rate work is done roughly balances the dissipation rate, which is consistent with small scale flow. The conversion time-scale depends on dynamical constraints. These are summarized by the magneto- geostrophic vertical vorticity balance by the top of the <span class="hlt">core</span>, which includes anisotropic effects of rotation, the magnetic field, and the <span class="hlt">core</span>-mantle boundary. The resulting theoretical spectra for the <span class="hlt">core</span>- source field and its SV are far more compatible with observation. The conversion time-scale of order 120 years is pseudo-scale-invariant. Magnetic spectra of other planets may differ; however, if a transition to non</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013IJAME..18..189S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013IJAME..18..189S"><span>Vibrations in a <span class="hlt">Fluid</span>-Loaded Poroelastic Hollow Cylinder Surrounded by a <span class="hlt">Fluid</span> in Plane-Strain Form</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Shanker, B.; Nath, C. N.; Shah, S. A.; Reddy, P. M.</p> <p>2013-03-01</p> <p>Plane-strain vibrations in a <span class="hlt">fluid</span>-loaded poroelastic hollow cylinder surrounded by a <span class="hlt">fluid</span> are investigated employing Biot's theory of wave propagation in poroelastic media. The poroelastic hollow cylinder is homogeneous and isotropic, while the inner and outer <span class="hlt">fluids</span> are homogeneous, isotropic and inviscid. The frequency equation of the <span class="hlt">fluid</span>-loaded poroelastic cylinder surrounded by a <span class="hlt">fluid</span> is obtained along with several particular cases, namely, <span class="hlt">fluid</span>-loaded poroelastic cylinder, <span class="hlt">fluid</span>-loaded bore, poroelastic cylinder surrounded by a <span class="hlt">fluid</span> and poroelastic solid cylinder submerged in a <span class="hlt">fluid</span>. The frequency equations are obtained for axially symmetric, flexural and anti-symmetric vibrations each for a pervious and an impervious surface. Nondimensional frequency for propagating modes is computed as a function of the ratio of thickness to the inner radius of the <span class="hlt">core</span>. The results are presented graphically for two types of poroelastic cylinders and then discussed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/899302','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/899302"><span>Thermophysical Properties of <span class="hlt">Fluids</span> and <span class="hlt">Fluid</span> Mixtures</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Sengers, Jan V.; Anisimov, Mikhail A.</p> <p>2004-05-03</p> <p>The major goal of the project was to study the effect of critical fluctuations on the thermophysical properties and phase behavior of <span class="hlt">fluids</span> and <span class="hlt">fluid</span> mixtures. Long-range fluctuations appear because of the presence of critical phase transitions. A global theory of critical fluctuations was developed and applied to represent thermodynamic properties and transport properties of molecular <span class="hlt">fluids</span> and <span class="hlt">fluid</span> mixtures. In the second phase of the project, the theory was extended to deal with critical fluctuations in complex <span class="hlt">fluids</span> such as polymer solutions and electrolyte solutions. The theoretical predictions have been confirmed by computer simulations and by light-scattering experiments. Fluctuations in <span class="hlt">fluids</span> in nonequilibrium states have also been investigated.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22467610','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22467610"><span><span class="hlt">Fluid</span> management strategies in heart failure.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Albert, Nancy M</p> <p>2012-04-01</p> <p>In patients with chronic heart failure, <span class="hlt">fluid</span> retention (or hypervolemia) is often the stimulus for acute decompensated heart failure that requires hospitalization. The pathophysiology of <span class="hlt">fluid</span> retention is complex and involves both hemodynamic and clinical congestion. Signs and symptoms of both hemodynamic and clinical congestion should be assessed serially during hospitalization. <span class="hlt">Core</span> heart failure drug and cardiac device therapies should be provided, and ultrafiltration may be warranted. Critical care, intermediate care, and telemetry nurses have roles in both assessment and management of patients hospitalized with acute decompensated heart failure and <span class="hlt">fluid</span> retention. Nurse administrators and managers have heightened their attention to <span class="hlt">fluid</span> retention because the Medicare performance measure known as the risk-standardized 30-day all-cause readmission rate after heart failure hospitalization can be attenuated by <span class="hlt">fluid</span> management strategies initiated by nurses during a patient's hospitalization.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/5717670','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/5717670"><span>Magnetized drive <span class="hlt">fluids</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Rosensweig, R.E.; Zahn, M.</p> <p>1986-04-01</p> <p>A process is described for recovering a first <span class="hlt">fluid</span> from a porous subterranean formation which comprises injecting a displacement <span class="hlt">fluid</span> in an effective amount to displace the first <span class="hlt">fluid</span>, injecting a ferrofluid, applying a magnetic field containing a gradient of field intensity within the formation, driving the displacement <span class="hlt">fluid</span> through the formation with the ferrofluid and recovering first <span class="hlt">fluid</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/873002','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/873002"><span><span class="hlt">Fluid</span> sampling tool</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Garcia, Anthony R.; Johnston, Roger G.; Martinez, Ronald K.</p> <p>2000-01-01</p> <p>A <span class="hlt">fluid</span>-sampling tool for obtaining a <span class="hlt">fluid</span> sample from a container. When used in combination with a rotatable drill, the tool bores a hole into a container wall, withdraws a <span class="hlt">fluid</span> sample from the container, and seals the borehole. The tool collects <span class="hlt">fluid</span> sample without exposing the operator or the environment to the <span class="hlt">fluid</span> or to wall shavings from the container.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://images.nasa.gov/#/details-PIA20503.html','SCIGOVIMAGE-NASA'); return false;" href="https://images.nasa.gov/#/details-PIA20503.html"><span><span class="hlt">Fluid</span> Fantasy</span></a></p> <p><a target="_blank" href="https://images.nasa.gov/">NASA Image and Video Library</a></p> <p></p> <p>2016-10-24</p> <p>Saturn's clouds are full of raw beauty, but they also represent a playground for a branch of physics called <span class="hlt">fluid</span> dynamics, which seeks to understand the motion of gases and liquids. Saturn's lack of a solid planetary surface (as on Earth, Mars or Venus) means that its atmosphere is free to flow around the planet essentially without obstruction. This is one factor that generates Saturn's pattern of alternating belts and zones -- one of the main features of its dynamic atmosphere. Winds in the belts blow at speeds different from those in the adjacent zones, leading to the formation of vortices along the boundaries between the two. And vigorous convection occasionally leads to storms and waves. Saturn's innermost rings are just visible at the bottom and in the upper left corner. This view is centered on clouds at 25 degrees north latitude on Saturn. The image was taken with the Cassini spacecraft wide-angle camera on July 20, 2016 using a spectral filter which preferentially admits wavelengths of near-infrared light centered at 728 nanometers. The view was obtained at a distance of approximately 752,000 miles (1.21 million kilometers) from Saturn and at a Sun-Saturn-spacecraft, or phase, angle of 6 degrees. Image scale is 45 miles (72 kilometers) per pixel. http://photojournal.jpl.nasa.gov/catalog/PIA20503</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19880009842','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19880009842"><span><span class="hlt">Core-core</span> and <span class="hlt">core</span>-valence correlation</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Bauschlicher, Charles W., Jr.; Langhoff, Stephen R.; Taylor, Peter R.</p> <p>1988-01-01</p> <p>The effect of (1s) <span class="hlt">core</span> correlation on properties and energy separations was analyzed using full configuration-interaction (FCI) calculations. The Be 1 S - 1 P, the C 3 P - 5 S and CH+ 1 Sigma + or - 1 Pi separations, and CH+ spectroscopic constants, dipole moment and 1 Sigma + - 1 Pi transition dipole moment were studied. The results of the FCI calculations are compared to those obtained using approximate methods. In addition, the generation of atomic natural orbital (ANO) basis sets, as a method for contracting a primitive basis set for both valence and <span class="hlt">core</span> correlation, is discussed. When both <span class="hlt">core-core</span> and <span class="hlt">core</span>-valence correlation are included in the calculation, no suitable truncated CI approach consistently reproduces the FCI, and contraction of the basis set is very difficult. If the (nearly constant) <span class="hlt">core-core</span> correlation is eliminated, and only the <span class="hlt">core</span>-valence correlation is included, CASSCF/MRCI approached reproduce the FCI results and basis set contraction is significantly easier.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/889830','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/889830"><span>Physical properties of preserved <span class="hlt">core</span> from the Geysers scientific corehole</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Roberts, J.J.; Bonner, B.P.; Duba, A.G.; Schneberk, D.L.</p> <p>1996-01-24</p> <p>X-ray attenuation, electrical conductivity, and ultrasonic velocity are reported for a segment of preserved <span class="hlt">core</span> from SB-15D, 918 ft. X-ray tomography and ultrasonic measurements change as the <span class="hlt">core</span> dries, providing information regarding handling and disturbance of the <span class="hlt">core</span>. Electrical conductivity measurements at reservoir conditions indicate that pore <span class="hlt">fluid</span> properties and pore microstructure control bulk conductivity. These data are useful for calibration and interpretation of field geophysical measurements.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012AGUFMDI31A2385S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012AGUFMDI31A2385S"><span>VLBI Observations of the Free <span class="hlt">Core</span> Nutations</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Smylie, D. E.</p> <p>2012-12-01</p> <p>At <span class="hlt">core</span> scale lengths with periods from a few hours to days, the Coriolis acceleration dominates the Lorentz force density and <span class="hlt">core</span> modes can be considered as purely mechanical. One of the most interesting <span class="hlt">core</span> modes is the spin-over mode, which reflects the ability of the outer <span class="hlt">core</span> to rotate about an axis different from that of either the inner <span class="hlt">core</span> or the shell. It has a nearly diurnal period. In the Earth frame of reference, this mode produces the nearly diurnal retrograde wobble. In the space frame of reference it is accompanied by the free <span class="hlt">core</span> nutations. When the flattening of the boundaries of the <span class="hlt">fluid</span> outer <span class="hlt">core</span> and the figure-figure gravitational coupling are taken into account, as well as the deformability of the boundaries, both a retrograde free <span class="hlt">core</span> nutation and a prograde free <span class="hlt">core</span> nutation are found. The retrograde free <span class="hlt">core</span> nutation was first predicted by Poincare (1910) for a completly <span class="hlt">fluid</span>, incompressible <span class="hlt">core</span> bounded by a rigid shell. In a variational calculation of wobble-nutation modes in realistic Earth models, Jiang (1993) found the classical retrograde free <span class="hlt">core</span> nutation (RFCN) but discovered a prograde free <span class="hlt">core</span> nutation (PFCN) as well. VLBI residuals in longitude and obliquity compared to the 1980 IAU nutation series, and their standard errors, were downloaded from the Goddard Space Flight Center website, for the period August 3, 1979 to March 6, 2003, giving 3343 points over a span of 8617 days. In an overlapping segment analysis, the discrete Fourier transform (DFT) for each segment was found for the corresponding series of unequally spaced nutation residuals by singular value decomposition (SVD), with the number of singular values eliminated determined by the satisfaction of Parseval's theorem. Both the RFCN and the PFCN resonances were found in the resulting power spectrum. The nutation resonances were found to be in free decay, the half-life of the PFCN at 2620 days and that of the RFCN at 2229 days, with Ekman boundary layer</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27052741','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27052741"><span>Efficacy of intravenous <span class="hlt">fluid</span> warming during goal-directed <span class="hlt">fluid</span> therapy in patients undergoing laparoscopic colorectal surgery: a randomized controlled trial.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Choi, Ji-Won; Kim, Duk-Kyung; Lee, Seung-Won; Park, Jung-Bo; Lee, Gyu-Hong</p> <p>2016-06-01</p> <p>To evaluate the clinical efficacy of intravenous (IV) <span class="hlt">fluid</span> warming in patients undergoing laparoscopic colorectal surgery. Adult patients undergoing laparoscopic colorectal surgery were randomly assigned to receive either IV <span class="hlt">fluids</span> at room temperature (control group) or warmed IV <span class="hlt">fluids</span> (warm <span class="hlt">fluids</span> group). Each patient received a standardized goal-directed <span class="hlt">fluid</span> regimen based on stroke volume variances. Oesophageal temperature was measured at 15 min intervals for 2 h after induction of anaesthesia. A total of 52 patients were enrolled in the study. The drop in <span class="hlt">core</span> temperature in the warm <span class="hlt">fluids</span> group was significantly less than in the control group 2 h after the induction of anaesthesia. This significant difference was seen from 30 min after induction. IV <span class="hlt">fluid</span> warming was associated with a smaller drop in <span class="hlt">core</span> temperature than room temperature IV <span class="hlt">fluids</span> in laparoscopic colorectal surgery incorporating goal-directed <span class="hlt">fluid</span> therapy. © The Author(s) 2016.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://medlineplus.gov/ency/article/003725.htm','NIH-MEDLINEPLUS'); return false;" href="https://medlineplus.gov/ency/article/003725.htm"><span>Pleural <span class="hlt">fluid</span> culture</span></a></p> <p><a target="_blank" href="http://medlineplus.gov/">MedlinePlus</a></p> <p></p> <p></p> <p>Culture - pleural <span class="hlt">fluid</span> ... is used to get a sample of pleural <span class="hlt">fluid</span>. The sample is sent to a laboratory and ... the chest wall into the pleural space. As <span class="hlt">fluid</span> drains into a collection bottle, you may cough ...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1154747','SCIGOV-DOEDE'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1154747"><span><span class="hlt">Fluid</span> Inclusion Gas Analysis</span></a></p> <p><a target="_blank" href="http://www.osti.gov/dataexplorer">DOE Data Explorer</a></p> <p>Dilley, Lorie</p> <p>2013-01-01</p> <p><span class="hlt">Fluid</span> inclusion gas analysis for wells in various geothermal areas. Analyses used in developing <span class="hlt">fluid</span> inclusion stratigraphy for wells and defining <span class="hlt">fluids</span> across the geothermal fields. Each sample has mass spectrum counts for 180 chemical species.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1154924','SCIGOV-DOEDE'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1154924"><span><span class="hlt">Fluid</span> Inclusion Gas Analysis</span></a></p> <p><a target="_blank" href="http://www.osti.gov/dataexplorer">DOE Data Explorer</a></p> <p>Dilley, Lorie</p> <p>2013-01-01</p> <p><span class="hlt">Fluid</span> inclusion gas analysis for wells in various geothermal areas. Analyses used in developing <span class="hlt">fluid</span> inclusion stratigraphy for wells and defining <span class="hlt">fluids</span> across the geothermal fields. Each sample has mass spectrum counts for 180 chemical species.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19770025512','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19770025512"><span><span class="hlt">Fluid</span> sampling device</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Studenick, D. K. (Inventor)</p> <p>1977-01-01</p> <p>An inlet leak is described for sampling gases, more specifically, for selectively sampling multiple <span class="hlt">fluids</span>. This <span class="hlt">fluid</span> sampling device includes a support frame. A plurality of <span class="hlt">fluid</span> inlet devices extend through the support frame and each of the <span class="hlt">fluid</span> inlet devices include a longitudinal aperture. An opening device that is responsive to a control signal selectively opens the aperture to allow <span class="hlt">fluid</span> passage. A closing device that is responsive to another control signal selectively closes the aperture for terminating further <span class="hlt">fluid</span> flow.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015EPSC...10..570R','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015EPSC...10..570R"><span>Mercury's thermal evolution and <span class="hlt">core</span> crystallization regime</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Rivoldini, A.; Van Hoolst, T.; Dumberry, M.; Steinle-Neumann, G.</p> <p>2015-10-01</p> <p>Unlike the Earth, where the liquid <span class="hlt">core</span> isentrope is shallower than the <span class="hlt">core</span> liquidus, at the lower pressures inside Mercury's <span class="hlt">core</span> the isentrope can be steeper than the melting temperature. As a consequence, upon cooling, the isentrope may first enter a solid stability field near the <span class="hlt">core</span> mantle boundary and produce ironrich snow that sinks under gravity and produces buoyant upwellings of iron depleted <span class="hlt">fluid</span>. Similar to bottom up crystallization, crystallization initiated near the top might generate sufficient buoyancy flux to drive magnetic field generation by compositional convection.In this study we model Mercury's thermal evolution by taking into account the formation of iron-rich snow to assess when the conditions for an internally magnetic field can be satisfied. We employ a thermodynamic consistent description of the iron high-pressure phase diagram and thermoelastic properties of iron alloys as well as the most recent data about the thermal conductivity of <span class="hlt">core</span> materials. We use a 1-dimensional parametrized thermal evolution model in the stagnant lid regime for the mantle (e.g. [1]) that is coupled to the <span class="hlt">core</span>. The model for the mantle takes into account the formation of the crust due to melting at depth. Mantle convection is driven by heat producing radioactive elements, heat loss from secular cooling and from the heat supplied by the <span class="hlt">core</span>. The heat generated inside the <span class="hlt">core</span> is mainly provided from secular cooling, from the latent heat released at iron freezing, and from gravitational energy resulting form the release of light elements at the inner <span class="hlt">core</span>-outer <span class="hlt">core</span> boundary as well as from the sinking of iron-rich snow and subsequent upwellings of light elements in the snow zone. If the heat flow out of the <span class="hlt">core</span> is smaller than the heat transported along the <span class="hlt">core</span> isentrope a thermal boundary will from at the top of the outer <span class="hlt">core</span>. To determine the extension of the convecting region inside the liquid <span class="hlt">core</span> we calculate the convective power [2]. Finally, we</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li class="active"><span>12</span></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_12 --> <div id="page_13" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li class="active"><span>13</span></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="241"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=20040171502&hterms=Geodynamo&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D10%26Ntt%3DGeodynamo','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=20040171502&hterms=Geodynamo&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D10%26Ntt%3DGeodynamo"><span>Magnetohydrodynamic Convection in the Outer <span class="hlt">Core</span> and its Geodynamic Consequences</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Kuang, Weijia; Chao, Benjamin F.; Fang, Ming</p> <p>2004-01-01</p> <p>The Earth's <span class="hlt">fluid</span> outer <span class="hlt">core</span> is in vigorous convection through much of the Earth's history. In addition to generating and maintaining Earth s time-varying magnetic field (geodynamo), the <span class="hlt">core</span> convection also generates mass redistribution in the <span class="hlt">core</span> and a dynamical pressure field on the <span class="hlt">core</span>-mantle boundary (CMB). All these shall result in various <span class="hlt">core</span>-mantle interactions, and contribute to surface geodynamic observables. For example, electromagnetic <span class="hlt">core</span>-mantle coupling arises from finite electrically conducting lower mantle; gravitational interaction occurs between the <span class="hlt">cores</span> and the heterogeneous mantle; mechanical coupling may also occur when the CMB topography is aspherical. Besides changing the mantle rotation via the coupling torques, the mass-redistribution in the <span class="hlt">core</span> shall produce a spatial-temporal gravity anomaly. Numerical modeling of the <span class="hlt">core</span> dynamical processes contributes in several geophysical disciplines. It helps explain the physical causes of surface geodynamic observables via space geodetic techniques and other means, e.g. Earth's rotation variation on decadal time scales, and secular time-variable gravity. Conversely, identification of the sources of the observables can provide additional insights on the dynamics of the <span class="hlt">fluid</span> <span class="hlt">core</span>, leading to better constraints on the physics in the numerical modeling. In the past few years, our <span class="hlt">core</span> dynamics modeling efforts, with respect to our MoSST model, have made significant progress in understanding individual geophysical consequences. However, integrated studies are desirable, not only because of more mature numerical <span class="hlt">core</span> dynamics models, but also because of inter-correlation among the geophysical phenomena, e.g. mass redistribution in the outer <span class="hlt">core</span> produces not only time-variable gravity, but also gravitational <span class="hlt">core</span>-mantle coupling and thus the Earth's rotation variation. They are expected to further facilitate multidisciplinary studies of <span class="hlt">core</span> dynamics and interactions of the <span class="hlt">core</span> with other</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/809818','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/809818"><span>SBIR Final Report. Liquid <span class="hlt">Core</span> Optical Scintillating Fibers</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Beetz, C.P.; Steinbeck, J.; Buerstler, R.</p> <p>2000-05-16</p> <p>This Phase I SBIR project focused on developing flexible scintillating liquid <span class="hlt">core</span> optical fibers, with potential uses in high-energy calorimetry, tracking, preradiators, active targets or other fast detectors. Progress on the six tasks of the project is summarized. The technical developments involve three technology components: (1) highly flexible capillaries or tubes of relatively low n (index of refraction) to serve as cladding and liquid <span class="hlt">core</span> containment; (2) scintillator (and clear) <span class="hlt">fluids</span> of relatively high n to serve as a <span class="hlt">core</span>-- these <span class="hlt">fluids</span> must have a high light transmission and, for some applications, radiation hardness; (3) optical end plugs, plug insertion, and plug-cladding tube sealing technology to contain the <span class="hlt">core</span> <span class="hlt">fluids</span> in the tubes, and to transmit the light.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/6130385','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/6130385"><span>Union soluble oil flood in El Dorado <span class="hlt">cores</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Chiou, C.S.</p> <p>1983-02-01</p> <p>Results are presented of laboratory experiments using Union's soluble oil flood process in El Dorado <span class="hlt">cores</span>. The <span class="hlt">core</span> flood is to provide complete information on <span class="hlt">fluid</span> compositions and phase behavior of the effluents such that adequate <span class="hlt">core</span> flood match using the chemical flood simulator can be made. This step is essential for evaluating reservoir performance on the South Pattern of the El Dorado Micellar-Polymer Project. The results show the caustic preflush in the flood process causes face plugging of the field <span class="hlt">cores</span>. The problem was controlled by using chelating agents along with the caustic <span class="hlt">fluid</span> to keep divalent cations in solution. The required amount of chelating agent was determined to be ca 25 times as strong as the original design for the field test. Liquid chromatography analysis of sulfonate provides valuable information on selective fractionation of monosulfonate in the micellar <span class="hlt">fluid</span>. 10 references.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014AGUFM.V11E..06L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014AGUFM.V11E..06L"><span>Experimental serpentinization of intact dunite <span class="hlt">cores</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Luhmann, A. J.; Tutolo, B. M.; Kong, X. Z.; Bagley, B. C.; Schaen, A. T.; Saar, M. O.; Seyfried, W. E., Jr.</p> <p>2014-12-01</p> <p>Serpentinization in ultramafic-hosted hydrothermal systems, such as Lost City, produces relatively cool and alkaline <span class="hlt">fluids</span> that support diverse ecosystems. To simulate serpentinization in such systems, we conducted single-pass, flow-through experiments on dunite <span class="hlt">cores</span> cut out of a sample from Jackson County, North Carolina. Experimental seawater prepared using laboratory-grade reagents and standards was pumped through a <span class="hlt">core</span> at 150ºC and 150 bar pore-<span class="hlt">fluid</span> outlet pressure at a flow rate of 0.01 ml/min. An additional experiment will be conducted at 200ºC. At 150ºC, permeability decreased by 2.3 times with reaction progress over the course of the 36 day experiment. <span class="hlt">Fluid</span>-rock reaction generally produced CO2, H2, CH4, and CO concentrations of 100 μmol/kg, up to 40 μmol/kg, 2 μmol/kg, and less than 1 μmol/kg, respectively. Outlet <span class="hlt">fluid</span> chemistry was relatively stable, except for initial peaks in Al, Ba, Fe, Mn, and Si. pH of outlet <span class="hlt">fluids</span> increased with reaction progress, but it was always lower (6.9-7.4) than the initial seawater (7.8). X-ray computed tomography scans were/will be collected for both pre- and post-experimental <span class="hlt">cores</span>. The combination of flow-through experiments on solid, intact rock <span class="hlt">cores</span> cut out of natural samples and X-ray tomography permits visualization and quantification of mineralogical changes and flow path evolution during serpentinization. This approach further permits physical and chemical processes to be documented on a fine scale to better understand feedbacks between chemical reactions and flow fields, with implications for ultramafic-hosted hydrothermal systems.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20000058165','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20000058165"><span>The Moon's Molten <span class="hlt">Core</span> and Tidal Q</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Williams, J. G.; Boggs, D. H.; Ratcliff, J. T.; Dickey, J. O.</p> <p>1998-01-01</p> <p>The rotation of the Moon is influenced by solid-body tides and interaction at a liquid-<span class="hlt">core</span>/solid-mantle boundary. The Lunar Laser Ranging (LLR) data are sensitive to variations in lunar rotation. Analysis of those ranges reveals four dissipation periodicities in the rotation. These signatures can be explained with the combined effects of tide plus <span class="hlt">core</span>, but not with either alone. The <span class="hlt">fluid</span> <span class="hlt">core</span> detection exceeds three times its uncertainty. The inferred <span class="hlt">core</span> radius has a 1 -sigma upper limit of 352 km for iron and up to 374 km if sulfur is present. The tidal dissipation is strong, Q at one month is 37 +/- 5 .Q increases for longer periods and is 60 (-15, +40) at one year.Dynamical evidence for a <span class="hlt">fluid</span> lunar <span class="hlt">core</span> has previously been presented. These-earlier solutions included three dissipation parameters. New solutions benefit from additional LLR data and an improved gravity field from Doppler tracking of Lunar Prospector. Five dissipation parameters are now solved for. There are several options for dissipation parameters: a <span class="hlt">core</span> coupling parameter, a time delay for tidal distortion of the moments of inertia, and five periodic terms in the rotation angles. Solutions with different combinations of these are compatible (a theory relates K/C and time delay to a series of periodic terms). The solutions used K/C, time delay, and one periodic term. When dissipation signatures at five rotation frequencies are solved for, four amplitudes (4 to 263 milliarcseconds) are detected above the noise. Attempts to explain these results using either tides alone or <span class="hlt">core</span> alone fail (less than 3(sigma) discrepancy for the former and 9(sigma), for the latter). A combination of tides and liquid <span class="hlt">core</span> matches the results well.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=Positive+AND+Stress&pg=7&id=EJ1006996','ERIC'); return false;" href="https://eric.ed.gov/?q=Positive+AND+Stress&pg=7&id=EJ1006996"><span>Academic Rigor: The <span class="hlt">Core</span> of the <span class="hlt">Core</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Brunner, Judy</p> <p>2013-01-01</p> <p>Some educators see the Common <span class="hlt">Core</span> State Standards as reason for stress, most recognize the positive possibilities associated with them and are willing to make the professional commitment to implementing them so that academic rigor for all students will increase. But business leaders, parents, and the authors of the Common <span class="hlt">Core</span> are not the only…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=core&pg=7&id=EJ1006996','ERIC'); return false;" href="http://eric.ed.gov/?q=core&pg=7&id=EJ1006996"><span>Academic Rigor: The <span class="hlt">Core</span> of the <span class="hlt">Core</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Brunner, Judy</p> <p>2013-01-01</p> <p>Some educators see the Common <span class="hlt">Core</span> State Standards as reason for stress, most recognize the positive possibilities associated with them and are willing to make the professional commitment to implementing them so that academic rigor for all students will increase. But business leaders, parents, and the authors of the Common <span class="hlt">Core</span> are not the only…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012PhRvE..86a6307B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012PhRvE..86a6307B"><span><span class="hlt">Fluid</span> mechanics in <span class="hlt">fluids</span> at rest</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Brenner, Howard</p> <p>2012-07-01</p> <p>Using readily available experimental thermophoretic particle-velocity data it is shown, contrary to current teachings, that for the case of compressible flows independent dye- and particle-tracer velocity measurements of the local <span class="hlt">fluid</span> velocity at a point in a flowing <span class="hlt">fluid</span> do not generally result in the same <span class="hlt">fluid</span> velocity measure. Rather, tracer-velocity equality holds only for incompressible flows. For compressible <span class="hlt">fluids</span>, each type of tracer is shown to monitor a fundamentally different <span class="hlt">fluid</span> velocity, with (i) a dye (or any other such molecular-tagging scheme) measuring the <span class="hlt">fluid</span>'s mass velocity v appearing in the continuity equation and (ii) a small, physicochemically and thermally inert, macroscopic (i.e., non-Brownian), solid particle measuring the <span class="hlt">fluid</span>'s volume velocity vv. The term “compressibility” as used here includes not only pressure effects on density, but also temperature effects thereon. (For example, owing to a liquid's generally nonzero isobaric coefficient of thermal expansion, nonisothermal liquid flows are to be regarded as compressible despite the general perception of liquids as being incompressible.) Recognition of the fact that two independent <span class="hlt">fluid</span> velocities, mass- and volume-based, are formally required to model continuum <span class="hlt">fluid</span> behavior impacts on the foundations of contemporary (monovelocity) <span class="hlt">fluid</span> mechanics. Included therein are the Navier-Stokes-Fourier equations, which are now seen to apply only to incompressible <span class="hlt">fluids</span> (a fact well-known, empirically, to experimental gas kineticists). The findings of a difference in tracer velocities heralds the introduction into <span class="hlt">fluid</span> mechanics of a general bipartite theory of <span class="hlt">fluid</span> mechanics, bivelocity hydrodynamics [Brenner, Int. J. Eng. Sci.10.1016/j.ijengsci.2012.01.006 54, 67 (2012)], differing from conventional hydrodynamics in situations entailing compressible flows and reducing to conventional hydrodynamics when the flow is incompressible, while being applicable to both liquids and</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23005525','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23005525"><span><span class="hlt">Fluid</span> mechanics in <span class="hlt">fluids</span> at rest.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Brenner, Howard</p> <p>2012-07-01</p> <p>Using readily available experimental thermophoretic particle-velocity data it is shown, contrary to current teachings, that for the case of compressible flows independent dye- and particle-tracer velocity measurements of the local <span class="hlt">fluid</span> velocity at a point in a flowing <span class="hlt">fluid</span> do not generally result in the same <span class="hlt">fluid</span> velocity measure. Rather, tracer-velocity equality holds only for incompressible flows. For compressible <span class="hlt">fluids</span>, each type of tracer is shown to monitor a fundamentally different <span class="hlt">fluid</span> velocity, with (i) a dye (or any other such molecular-tagging scheme) measuring the <span class="hlt">fluid</span>'s mass velocity v appearing in the continuity equation and (ii) a small, physicochemically and thermally inert, macroscopic (i.e., non-Brownian), solid particle measuring the <span class="hlt">fluid</span>'s volume velocity v(v). The term "compressibility" as used here includes not only pressure effects on density, but also temperature effects thereon. (For example, owing to a liquid's generally nonzero isobaric coefficient of thermal expansion, nonisothermal liquid flows are to be regarded as compressible despite the general perception of liquids as being incompressible.) Recognition of the fact that two independent <span class="hlt">fluid</span> velocities, mass- and volume-based, are formally required to model continuum <span class="hlt">fluid</span> behavior impacts on the foundations of contemporary (monovelocity) <span class="hlt">fluid</span> mechanics. Included therein are the Navier-Stokes-Fourier equations, which are now seen to apply only to incompressible <span class="hlt">fluids</span> (a fact well-known, empirically, to experimental gas kineticists). The findings of a difference in tracer velocities heralds the introduction into <span class="hlt">fluid</span> mechanics of a general bipartite theory of <span class="hlt">fluid</span> mechanics, bivelocity hydrodynamics [Brenner, Int. J. Eng. Sci. 54, 67 (2012)], differing from conventional hydrodynamics in situations entailing compressible flows and reducing to conventional hydrodynamics when the flow is incompressible, while being applicable to both liquids and gases.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26410145','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26410145"><span>Principles of <span class="hlt">Fluid</span> Management.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Rewa, Oleksa; Bagshaw, Sean M</p> <p>2015-10-01</p> <p><span class="hlt">Fluid</span> therapy is the most common intervention received by acutely ill hospitalized patients; however, important questions on its optimal use remain. Its prescription should be patient and context specific, with clear indications and contradictions, and have the type, dose, and rate specified. Any <span class="hlt">fluid</span> therapy, if provided inappropriately, can contribute unnecessary harm to patients. The quantitative toxicity of <span class="hlt">fluid</span> therapy contributes to worse outcomes; this should prompt greater bedside attention to <span class="hlt">fluid</span> prescription, <span class="hlt">fluid</span> balance, development of avoidable complications attributable to <span class="hlt">fluid</span> overload, and for the timely deresuscitation of patients whose clinical status and physiology allow active <span class="hlt">fluid</span> mobilization. Copyright © 2015 Elsevier Inc. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2008AGUFMGP43A0790V','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2008AGUFMGP43A0790V"><span>Geodynamo, <span class="hlt">Core</span> Energy, Precession, and Spheroids</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Vanyo, J. P.</p> <p>2008-12-01</p> <p>Mantle precession and <span class="hlt">core</span> oblateness have been suggested for support of geodynamo energy dissipation and <span class="hlt">fluid</span> motions. Precession usually has been considered negligible. With a precession motion of 25,800 year/period and a period of 60x360 = 21,600 arc-minute, the motion is on the order of one arc-minute/year (little off by the sine of Earth's obliquity). The 'rigid' mantle changes its axis direction about one arc-minute each year. That is a major motion. Compare the sun's or the moon's apparent diameter of about 32 arc- minute. The CMB's oblateness is about (a-b)/a = 1/400. With (a-b) = 8.7 km, and estimates of its surface irregularities over 3 km, the CMB is neither smooth nor oblate. Between its 'calculated' oblate CMB and a 'calculated' included sphere, its very thin crescentoid interstice will generate turbulence and separation form drag with large dissipation energy rates. The actual <span class="hlt">core</span> will not see the CMB but an effective smaller <span class="hlt">fluid</span> sphere. Precession is an important feature of a geodynamo, but 1/400 oblateness is less pertinent. The <span class="hlt">core</span> axis lags the precessing mantle axis by a small angle. This misalignment daily rubs the <span class="hlt">core</span> against the mantle and produces major energy dissipation rates. The liquid <span class="hlt">core</span> maintains its average lagging location by coupling drag and <span class="hlt">core</span> internal flows. A correct analysis will use a 'rigid-sphere' model (1972 ref.) for energy, geodynamo, and coupling motion. The outer <span class="hlt">core</span> is a melt whose temperature and heat are well known but not its cause. Some will be residual heat, but much of it will be generated by precession and radioactivity. Rigid-sphere energy (J. Appl. Mech. 1972, v39, 18-24). Geodynamo precession (Geo. Astro. <span class="hlt">Fluid</span> Dyn. 1991, v59, 209-234). Turbulent laminar flow (Geophys. J. Intl., 1995, v121, 136-142). Concentric cylinders (Geophys. J. Intl., 2000, v142, 409-425). <span class="hlt">Core</span> mantle coupling (Geophys. J. Intl., 2004, v158, 470-478). Theory and data (Rotating <span class="hlt">Fluids</span>", 2001, Dover, Figs. 4.5, 4.10 and pp. 326</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015PEPS....2...29A','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015PEPS....2...29A"><span>Liquid sodium models of the Earth's <span class="hlt">core</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Adams, Matthew M.; Stone, Douglas R.; Zimmerman, Daniel S.; Lathrop, Daniel P.</p> <p>2015-12-01</p> <p>Our understanding of the dynamics of the Earth's <span class="hlt">core</span> can be advanced by a combination of observation, experiments, and simulations. A crucial aspect of the <span class="hlt">core</span> is the interplay between the flow of the conducting liquid and the magnetic field this flow sustains via dynamo action. This non-linear interaction, and the presence of turbulence in the flow, precludes direct numerical simulation of the system with realistic turbulence. Thus, in addition to simulations and observations (both seismological and geomagnetic), experiments can contribute insight into the <span class="hlt">core</span> dynamics. Liquid sodium laboratory experiments can serve as models of the Earth's <span class="hlt">core</span> with the key ingredients of conducting <span class="hlt">fluid</span>, turbulent flow, and overall rotation, and can also approximate the geometry of the <span class="hlt">core</span>. By accessing regions of parameter space inaccessible to numerical studies, experiments can benchmark simulations and reveal phenomena relevant to the Earth's <span class="hlt">core</span> and other planetary <span class="hlt">cores</span>. This review focuses on the particular contribution of liquid sodium spherical Couette devices to this subject matter.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/6043841','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/6043841"><span>Method and apparatus for reducing field filter cake on sponge <span class="hlt">cores</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Park, A.; Wilson, B. T.</p> <p>1984-10-30</p> <p>A well <span class="hlt">coring</span> apparatus includes an outer barrel and an inner barrel. The inner barrel is sealed with a rupturable diaphragm and a check valve. A sponge is disposed around the inner walls of the inner barrel for contacting the <span class="hlt">core</span>. A <span class="hlt">fluid</span> is disposed in the sealed inner barrel to prewet the sponge. A piercer is reciprocally disposed within the outer barrel and has a conical shaped surface, the apex of which is operable to pierce the diaphragm. In response to forming of the <span class="hlt">core</span>, the <span class="hlt">fluid</span> displaced by the <span class="hlt">core</span> prevents drilling mud from being disposed between the <span class="hlt">core</span> and the sponge.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/870151','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/870151"><span><span class="hlt">Fluid</span> transport container</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>DeRoos, Bradley G.; Downing, Jr., John P.; Neal, Michael P.</p> <p>1995-01-01</p> <p>An improved <span class="hlt">fluid</span> container for the transport, collection, and dispensing of a sample <span class="hlt">fluid</span> that maintains the <span class="hlt">fluid</span> integrity relative to the conditions of the location at which it is taken. More specifically, the invention is a <span class="hlt">fluid</span> sample transport container that utilizes a fitment for both penetrating and sealing a storage container under controlled conditions. Additionally, the invention allows for the periodic withdrawal of portions of the sample <span class="hlt">fluid</span> without contamination or intermixing from the environment surrounding the sample container.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/131899','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/biblio/131899"><span><span class="hlt">Fluid</span> transport container</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>DeRoos, B.G.; Downing, J.P. Jr.; Neal, M.P.</p> <p>1995-11-14</p> <p>An improved <span class="hlt">fluid</span> container for the transport, collection, and dispensing of a sample <span class="hlt">fluid</span> that maintains the <span class="hlt">fluid</span> integrity relative to the conditions of the location at which it is taken. More specifically, the invention is a <span class="hlt">fluid</span> sample transport container that utilizes a fitting for both penetrating and sealing a storage container under controlled conditions. Additionally, the invention allows for the periodic withdrawal of portions of the sample <span class="hlt">fluid</span> without contamination or intermixing from the environment surrounding the sample container. 13 figs.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016A%26A...587L...2S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016A%26A...587L...2S"><span>Rapid rotational crust-<span class="hlt">core</span> relaxation in magnetars</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Sedrakian, Armen</p> <p>2016-03-01</p> <p>If a magnetar interior B-field exceeds 1015 G, it will unpair the proton superconductor in the stellar <span class="hlt">core</span> by inducing diamagnetic currents that destroy the Cooper pair coherence. Then, the P-wave neutron superfluid in these non-superconducting regions will couple to the stellar plasma by scattering of protons off the quasiparticles that are confined in the <span class="hlt">cores</span> of neutron vortices by the strong (nuclear) force. The dynamical timescales associated with this interaction span from several minutes at the crust-<span class="hlt">core</span> interface to a few seconds in the deep <span class="hlt">core</span>. We show that (a) the rapid crust-<span class="hlt">core</span> coupling is incompatible with oscillation models of magnetars that completely decouple the <span class="hlt">core</span> superfluid from the crust and (b) magnetar precession is damped by the coupling of normal <span class="hlt">fluids</span> to the superfluid <span class="hlt">core</span> and, if observed, needs to be forced or continuously excited by seismic activity.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23802966','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23802966"><span>Critical asymmetry in renormalization group theory for <span class="hlt">fluids</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Zhao, Wei; Wu, Liang; Wang, Long; Li, Liyan; Cai, Jun</p> <p>2013-06-21</p> <p>The renormalization-group (RG) approaches for <span class="hlt">fluids</span> are employed to investigate critical asymmetry of vapour-liquid equilibrium (VLE) of <span class="hlt">fluids</span>. Three different approaches based on RG theory for <span class="hlt">fluids</span> are reviewed and compared. RG approaches are applied to various <span class="hlt">fluid</span> systems: hard-<span class="hlt">core</span> square-well <span class="hlt">fluids</span> of variable ranges, hard-<span class="hlt">core</span> Yukawa <span class="hlt">fluids</span>, and square-well dimer <span class="hlt">fluids</span> and modelling VLE of n-alkane molecules. Phase diagrams of simple model <span class="hlt">fluids</span> and alkanes described by RG approaches are analyzed to assess the capability of describing the VLE critical asymmetry which is suggested in complete scaling theory. Results of thermodynamic properties obtained by RG theory for <span class="hlt">fluids</span> agree with the simulation and experimental data. Coexistence diameters, which are smaller than the critical densities, are found in the RG descriptions of critical asymmetries of several <span class="hlt">fluids</span>. Our calculation and analysis show that the approach coupling local free energy with White's RG iteration which aims to incorporate density fluctuations into free energy is not adequate for VLE critical asymmetry due to the inadequate order parameter and the local free energy functional used in the partition function.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2010AGUFMDI41A1925K','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2010AGUFMDI41A1925K"><span>Viscosity of the Earth's inner <span class="hlt">core</span>: constraints from nutation observations</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Koot, L.; Dumberry, M.</p> <p>2010-12-01</p> <p>Nutations are the variations in the orientation of the Earth’s rotation axis in a space-fixed reference frame. This motion shows two important normal modes, the Free <span class="hlt">Core</span> Nutation (FCN) and the Free Inner <span class="hlt">Core</span> Nutation (FICN), of which the frequencies and damping depend directly on the Earth’s interior structure and dynamics. The FICN is characterized by a differential rotation of the inner <span class="hlt">core</span> relative to the mantle and outer <span class="hlt">core</span>. Its natural frequency is thus directly affected both by the strength of the mechanical coupling at the inner <span class="hlt">core</span> boundary (ICB) and by the way the inner <span class="hlt">core</span> deforms due to centrifugal forces. Similarly, the damping of the mode reflects the energy dissipated both through the coupling at the ICB and through inner <span class="hlt">core</span> deformation. Estimations of the ICB coupling strength and dissipation have been obtained previously from nutation observations by assuming a purely elastic inner <span class="hlt">core</span> (Mathews et al. 2002, Koot et al. 2010). When interpreted in terms of a visco-magnetic coupling, these estimations lead to values of the magnetic field at the ICB around 6-7 mT and to a kinematic viscosity of the <span class="hlt">fluid</span> <span class="hlt">core</span> close to the ICB in the range of 10-30 m2 s-1. This value of the ICB <span class="hlt">fluid</span> <span class="hlt">core</span> viscosity is orders of magnitude larger than what is expected from laboratory measurements and ‘ab initio’ computations. In this work, we show that a visco-elastic inner <span class="hlt">core</span> is able to reconcile the estimation of the outer <span class="hlt">core</span> kinematic viscosity with that of laboratory measurements and ab initio computations. This reconciliation is achieved for a very narrow range of values of the inner <span class="hlt">core</span> viscosity, which can be considered as a nutation constraint on this physical quantity. Finally, we show that this nutation constraint is in very good agreement with seismic observations of shear waves attenuation in the inner <span class="hlt">core</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20120013232','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20120013232"><span><span class="hlt">Coring</span> Sample Acquisition Tool</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Haddad, Nicolas E.; Murray, Saben D.; Walkemeyer, Phillip E.; Badescu, Mircea; Sherrit, Stewart; Bao, Xiaoqi; Kriechbaum, Kristopher L.; Richardson, Megan; Klein, Kerry J.</p> <p>2012-01-01</p> <p>A sample acquisition tool (SAT) has been developed that can be used autonomously to sample drill and capture rock <span class="hlt">cores</span>. The tool is designed to accommodate <span class="hlt">core</span> transfer using a sample tube to the IMSAH (integrated Mars sample acquisition and handling) SHEC (sample handling, encapsulation, and containerization) without ever touching the pristine <span class="hlt">core</span> sample in the transfer process.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19760000293&hterms=cut+uncut+PICC&qs=Ntx%3Dmode%2Bmatchany%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3Dcut%2Buncut%2BPICC','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19760000293&hterms=cut+uncut+PICC&qs=Ntx%3Dmode%2Bmatchany%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3Dcut%2Buncut%2BPICC"><span>Toroidal converter <span class="hlt">core</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Mclyman, W. T.</p> <p>1977-01-01</p> <p>Improved approach consists of cut and uncut <span class="hlt">cores</span> nested in concentric configuration. <span class="hlt">Cores</span> are made by winding steel ribbon on mandrel and impregnating with epoxy to bond layers together. Gap is made by cutting across wound and bonded <span class="hlt">core</span>. Rough ends are ground or lapped.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li class="active"><span>13</span></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_13 --> <div id="page_14" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li class="active"><span>14</span></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="261"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=core+AND+competence&pg=2&id=EJ621608','ERIC'); return false;" href="https://eric.ed.gov/?q=core+AND+competence&pg=2&id=EJ621608"><span><span class="hlt">Core</span> Competence and Education.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Holmes, Gary; Hooper, Nick</p> <p>2000-01-01</p> <p>Outlines the concept of <span class="hlt">core</span> competence and applies it to postcompulsory education in the United Kingdom. Adopts an educational perspective that suggests accreditation as the <span class="hlt">core</span> competence of universities. This economic approach suggests that the market trend toward lifetime learning might best be met by institutions developing a <span class="hlt">core</span> competence…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19780018908&hterms=rocket+mechanics&qs=N%3D0%26Ntk%3DAll%26Ntx%3Dmode%2Bmatchall%26Ntt%3Drocket%2Bmechanics','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19780018908&hterms=rocket+mechanics&qs=N%3D0%26Ntk%3DAll%26Ntx%3Dmode%2Bmatchall%26Ntt%3Drocket%2Bmechanics"><span>Review of coaxial flow gas <span class="hlt">core</span> nuclear rocket <span class="hlt">fluid</span> mechanics</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Weinstein, H.</p> <p>1976-01-01</p> <p>The two areas where discussion and comparison of work is most useful are in (1) the factors which influence containment in cold flow studies; and (2) the effects of heat generation on containment. The work in these areas have not received any critical review in the past. The review is structured in such a way as to compare and contrast the related work of the program, rather than to preserve the chronological order of the work.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1981bsp..book.....P','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1981bsp..book.....P"><span>Modern <span class="hlt">fluid</span> mechanics</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Pai, S.-I.</p> <p></p> <p>The properties of <span class="hlt">fluids</span> are examined, taking into account <span class="hlt">fluids</span> and modern <span class="hlt">fluid</span> mechanics, the properties of liquids and gases, the properties of a plasma, the kinetic theory of <span class="hlt">fluids</span>, the Boltzmann-Maxwellian laws of distribution, atomic and molecular structures, specific heats, enthalpy, ionization, radiation, viscosity, rheology, heat transfer, and the mixture of <span class="hlt">fluids</span>. Statics of <span class="hlt">fluids</span> are considered along with the fundamentals of <span class="hlt">fluid</span> dynamics, giving attention to flow regimes, the conservation of mass, the equation of continuity, diffusion equations, the stream function, equations of motion, Kelvin's theorem, equations of motion from the Lagrangian point of view, boundary conditions, and initial conditions. Other topics discussed are related to dimensional analysis and dynamics similarity, aerothermochemistry, magnetofluid dynamics and plasma dynamics, radiation gasdynamics, rarefied gasdynamics, non-Newtonian <span class="hlt">fluids</span>, two-phase flows, the multifluid theory of a plasma, and relativistic <span class="hlt">fluid</span> mechanics</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4524816','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4524816"><span>Postoperative <span class="hlt">fluid</span> management</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Kayilioglu, Selami Ilgaz; Dinc, Tolga; Sozen, Isa; Bostanoglu, Akin; Cete, Mukerrem; Coskun, Faruk</p> <p>2015-01-01</p> <p>Postoperative care units are run by an anesthesiologist or a surgeon, or a team formed of both. Management of postoperative <span class="hlt">fluid</span> therapy should be done considering both patients’ status and intraoperative events. Types of the <span class="hlt">fluids</span>, amount of the <span class="hlt">fluid</span> given and timing of the administration are the main topics that determine the <span class="hlt">fluid</span> management strategy. The main goal of <span class="hlt">fluid</span> resuscitation is to provide adequate tissue perfusion without harming the patient. The endothelial glycocalyx dysfunction and <span class="hlt">fluid</span> shift to extracellular compartment should be considered wisely. <span class="hlt">Fluid</span> management must be done based on patient’s body <span class="hlt">fluid</span> status. Patients who are responsive to <span class="hlt">fluids</span> can benefit from <span class="hlt">fluid</span> resuscitation, whereas patients who are not <span class="hlt">fluid</span> responsive are more likely to suffer complications of over-hydration. Therefore, common use of central venous pressure measurement, which is proved to be inefficient to predict <span class="hlt">fluid</span> responsiveness, should be avoided. Goal directed strategy is the most rational approach to assess the patient and maintain optimum <span class="hlt">fluid</span> balance. However, accessible and applicable monitoring tools for determining patient’s actual <span class="hlt">fluid</span> need should be further studied and universalized. The debate around colloids and crystalloids should also be considered with goal directed therapies. Advantages and disadvantages of each solution must be evaluated with the patient’s specific condition. PMID:26261771</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/16099758','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/16099758"><span>Vortex <span class="hlt">core</span> identification in viscous hydrodynamics.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Finn, Lucas I; Boghosian, Bruce M; Kottke, Christopher N</p> <p>2005-08-15</p> <p>We describe a software package designed for the investigation of topological <span class="hlt">fluid</span> dynamics with a novel algorithm for locating and tracking vortex <span class="hlt">cores</span>. The package is equipped with modules for generating desired vortex knots and links and evolving them according to the Navier-Stokes equations, while tracking and visualizing them. The package is parallelized using a message passing interface for a multiprocessor environment and makes use of a computational steering library for dynamic user intervention.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011APS..APR.D1007F','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011APS..APR.D1007F"><span>How perfect is a neutron <span class="hlt">fluid</span>?</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Fu, Dan; Mekjian, Aram</p> <p>2011-04-01</p> <p>A perfect <span class="hlt">fluid</span> has the lowest shear viscosity allowed by the uncertainty principle which also involves a study of the entropy density. Kinetic theory based on the Chapman-Enskog approach is used to obtain both the classical and quantum values of the viscosity of a neutron <span class="hlt">fluid</span>. The interaction potential used in the study is an attractive square well with an inner hard <span class="hlt">core</span>. The classical scattering angle and the phase shifts are calculated for this potential. The entropy density is based on the Sakur-Tetrode law plus corrections coming from two particle interactions obtained from a Beth-Ulhenbeck expression. Using these results for the viscosity and entropy density, the perfect <span class="hlt">fluid</span> aspects of a neutron <span class="hlt">fluid</span> are addressed. The viscosity to number density is also proportional to Planck's constant. The proportionality constant, called alpha, is found to be of the order of 1 in a quantum description of a neutron <span class="hlt">fluid</span>. The value of the viscosity for a neutron <span class="hlt">fluid</span> is near its unitary limit. For air at STP alpha is 7500, for water alpha is 300. The results for neutron matter suggest a near perfect <span class="hlt">fluid</span> behavior. Supported by DOE-Grant DE-FG02Er-40987</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2007ApPhA..89..565R','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2007ApPhA..89..565R"><span>Dimensional analysis of aqueous magnetic <span class="hlt">fluids</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Răcuciu, M.; Creangă, D. E.; Suliţanu, N.; Bădescu, V.</p> <p>2007-11-01</p> <p>A comparison of the synthesis and characterization of three aqueous magnetic <span class="hlt">fluids</span> intended for biomedical applications is presented. Stable colloidal suspensions of iron oxide nanoparticles were prepared by a co-precipitation method with the magnetite <span class="hlt">cores</span> being coated with β-cyclodextrin, tetramethylammonium hydroxide and citric acid. Rheological properties of the <span class="hlt">fluids</span> were investigated, i.e. viscosity (capillary method) and surface tension (stalagmometric method) in correlation with their density (picnometric method). The dimensional distributions of the ferrophase particles physical diameter of these three magnetic <span class="hlt">fluids</span> - revealed on the basis of transmission electron microscopy (TEM) data - as well as the diameter distributions of some other magnetic <span class="hlt">fluids</span> presented in the literature, were comparatively analyzed using the box-plot statistical method. In order to extract complementary data on the magnetic diameter of an iron oxide <span class="hlt">core</span>, magnetization measurements as well as X-ray diffraction pattern analysis were carried out. Interpretation of all the measurement data was accomplished by assessing the suitability of the three magnetic <span class="hlt">fluid</span> samples from the viewpoint of their stability and biocompatibility.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19740009815','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19740009815"><span>Banded transformer <span class="hlt">cores</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Mclyman, C. W. T. (Inventor)</p> <p>1974-01-01</p> <p>A banded transformer <span class="hlt">core</span> formed by positioning a pair of mated, similar <span class="hlt">core</span> halves on a supporting pedestal. The <span class="hlt">core</span> halves are encircled with a strap, selectively applying tension whereby a compressive force is applied to the <span class="hlt">core</span> edge for reducing the innate air gap. A dc magnetic field is employed in supporting the <span class="hlt">core</span> halves during initial phases of the banding operation, while an ac magnetic field subsequently is employed for detecting dimension changes occurring in the air gaps as tension is applied to the strap.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/6930557','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/6930557"><span>Transport theory for the Lennard-Jones dense <span class="hlt">fluid</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Karkheck, J.; Stell, G.; Xu, J.</p> <p>1988-11-01</p> <p>A kinetic theory for a <span class="hlt">fluid</span> of particles interacting via a pair potential with hard-<span class="hlt">core</span> plus truncated tail is described and used to derive a transport theory for the Lennard-Jones <span class="hlt">fluid</span> as well as the square-well <span class="hlt">fluid</span>. Numerical results for shear viscosity, thermal conductivity, and the self-diffusion coefficient are given for the Lennard-Jones <span class="hlt">fluid</span> and compared with simulation and experimental results. Our Lennard-Jones theory proves quantitatively useful over a wide range of states.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/5643789','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/5643789"><span><span class="hlt">Fluid</span> sampling pump</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Allen, P.V.; Nimberger, M.; Ward, R.L.</p> <p>1991-12-24</p> <p>This patent describes a <span class="hlt">fluid</span> sampling pump for withdrawing pressurized sample <span class="hlt">fluid</span> from a flow line and for pumping a preselected quantity of sample <span class="hlt">fluid</span> with each pump driving stroke from the pump to a sample vessel, the sampling pump including a pump body defining a pump bore therein having a central axis, a piston slideably moveable within the pump bore and having a <span class="hlt">fluid</span> inlet end and an opposing operator end, a <span class="hlt">fluid</span> sample inlet port open to sample <span class="hlt">fluid</span> in the flow line, a <span class="hlt">fluid</span> sample outlet port for transmitting <span class="hlt">fluid</span> from the pump bore to the sample vessel, and a line pressure port in <span class="hlt">fluid</span> pressure sample <span class="hlt">fluid</span> in the flow line, an inlet valve for selectively controlling sample <span class="hlt">fluid</span> flow from the flow line through the <span class="hlt">fluid</span> sample inlet port, an operator unit for periodically reciprocating the piston within the pump bore, and a controller for regulating the stroke of the piston within the pump bore, and thereby the quantity of <span class="hlt">fluid</span> pumped with each pump driving stroke. It comprises a balanced check valve seat; a balanced check valve seal; a compression member; and a central plunger.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('//www.loc.gov/pictures/collection/hh/item/al1054.photos.046337p/','SCIGOV-HHH'); return false;" href="//www.loc.gov/pictures/collection/hh/item/al1054.photos.046337p/"><span>23. <span class="hlt">CORE</span> WORKER OPERATING A COREBLOWER THAT PNEUMATICALLY FILLED <span class="hlt">CORE</span> ...</span></a></p> <p><a target="_blank" href="http://www.loc.gov/pictures/collection/hh/">Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey</a></p> <p></p> <p></p> <p>23. <span class="hlt">CORE</span> WORKER OPERATING A <span class="hlt">CORE</span>-BLOWER THAT PNEUMATICALLY FILLED <span class="hlt">CORE</span> BOXES WITH RESIGN IMPREGNATED SAND AND CREATED A <span class="hlt">CORE</span> THAT THEN REQUIRED BAKING, CA. 1950. - Stockham Pipe & Fittings Company, 4000 Tenth Avenue North, Birmingham, Jefferson County, AL</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/875157','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/875157"><span>Environmentally safe <span class="hlt">fluid</span> extractor</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Sungaila, Zenon F.</p> <p>1993-01-01</p> <p>An environmentally safe <span class="hlt">fluid</span> extraction device for use in mobile laboratory and industrial settings comprising a pump, compressor, valving system, waste recovery tank, <span class="hlt">fluid</span> tank, and a exhaust filtering system.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1176655','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1176655"><span>Environmentally safe <span class="hlt">fluid</span> extractor</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Sungaila, Zenon F.</p> <p>1993-07-06</p> <p>An environmentally safe <span class="hlt">fluid</span> extraction device for use in mobile laboratory and industrial settings comprising a pump, compressor, valving system, waste recovery tank, <span class="hlt">fluid</span> tank, and a exhaust filtering system.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1221975','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1221975"><span>Electric <span class="hlt">fluid</span> pump</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Van Dam, Jeremy Daniel; Turnquist, Norman Arnold; Raminosoa, Tsarafidy; Shah, Manoj Ramprasad; Shen, Xiaochun</p> <p>2015-09-29</p> <p>An electric machine is presented. The electric machine includes a hollow rotor; and a stator disposed within the hollow rotor, the stator defining a flow channel. The hollow rotor includes a first end portion defining a <span class="hlt">fluid</span> inlet, a second end portion defining a <span class="hlt">fluid</span> outlet; the <span class="hlt">fluid</span> inlet, the <span class="hlt">fluid</span> outlet, and the flow channel of the stator being configured to allow passage of a <span class="hlt">fluid</span> from the <span class="hlt">fluid</span> inlet to the <span class="hlt">fluid</span> outlet via the flow channel; and wherein the hollow rotor is characterized by a largest cross-sectional area of hollow rotor, and wherein the flow channel is characterized by a smallest cross-sectional area of the flow channel, wherein the smallest cross-sectional area of the flow channel is at least about 25% of the largest cross-sectional area of the hollow rotor. An electric <span class="hlt">fluid</span> pump and a power generation system are also presented.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://medlineplus.gov/ency/article/003720.htm','NIH-MEDLINEPLUS'); return false;" href="https://medlineplus.gov/ency/article/003720.htm"><span>Pericardial <span class="hlt">fluid</span> culture</span></a></p> <p><a target="_blank" href="http://medlineplus.gov/">MedlinePlus</a></p> <p></p> <p></p> <p>... medlineplus.gov/ency/article/003720.htm Pericardial <span class="hlt">fluid</span> culture To use the sharing features on this page, please enable JavaScript. Pericardial <span class="hlt">fluid</span> culture is a test performed on a sample of ...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://medlineplus.gov/ency/article/003721.htm','NIH-MEDLINEPLUS'); return false;" href="https://medlineplus.gov/ency/article/003721.htm"><span>Pleural <span class="hlt">fluid</span> smear</span></a></p> <p><a target="_blank" href="http://medlineplus.gov/">MedlinePlus</a></p> <p></p> <p></p> <p>... the <span class="hlt">fluid</span> that has collected in the pleural space. This is the space between the lining of the outside of the ... the chest. When <span class="hlt">fluid</span> collects in the pleural space, the condition is called pleural effusion .</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://medlineplus.gov/ency/article/003626.htm','NIH-MEDLINEPLUS'); return false;" href="https://medlineplus.gov/ency/article/003626.htm"><span>Peritoneal <span class="hlt">fluid</span> analysis</span></a></p> <p><a target="_blank" href="http://medlineplus.gov/">MedlinePlus</a></p> <p></p> <p></p> <p>... at <span class="hlt">fluid</span> that has built up in the space in the abdomen around the internal organs. This area is called the peritoneal space. ... sample of <span class="hlt">fluid</span> is removed from the peritoneal space using a needle and syringe. Your health care ...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://medlineplus.gov/ency/article/003719.htm','NIH-MEDLINEPLUS'); return false;" href="https://medlineplus.gov/ency/article/003719.htm"><span>Pericardial <span class="hlt">fluid</span> Gram stain</span></a></p> <p><a target="_blank" href="http://medlineplus.gov/">MedlinePlus</a></p> <p></p> <p></p> <p>... staining a sample of <span class="hlt">fluid</span> taken from the pericardium. This is the sac surrounding the heart to ... sample of <span class="hlt">fluid</span> will be taken from the pericardium. This is done through a procedure called pericardiocentesis . ...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://medlineplus.gov/ency/imagepages/9058.htm','NIH-MEDLINEPLUS'); return false;" href="https://medlineplus.gov/ency/imagepages/9058.htm"><span>Amniotic <span class="hlt">fluid</span> (image)</span></a></p> <p><a target="_blank" href="http://medlineplus.gov/">MedlinePlus</a></p> <p></p> <p></p> <p>Amniotic <span class="hlt">fluid</span> surrounds the growing fetus in the womb and protects the fetus from injury and temperature changes. It ... fetal movement and permits musculoskeletal development. The amniotic <span class="hlt">fluid</span> can be withdrawn in a procedure called amniocentsis ...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/874010','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/874010"><span><span class="hlt">Fluid</span> sampling tool</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Johnston, Roger G.; Garcia, Anthony R. E.; Martinez, Ronald K.</p> <p>2001-09-25</p> <p>The invention includes a rotatable tool for collecting <span class="hlt">fluid</span> through the wall of a container. The tool includes a <span class="hlt">fluid</span> collection section with a cylindrical shank having an end portion for drilling a hole in the container wall when the tool is rotated, and a threaded portion for tapping the hole in the container wall. A passageway in the shank in communication with at least one radial inlet hole in the drilling end and an opening at the end of the shank is adapted to receive <span class="hlt">fluid</span> from the container. The tool also includes a cylindrical chamber affixed to the end of the shank opposite to the drilling portion thereof for receiving and storing <span class="hlt">fluid</span> passing through the passageway. The tool also includes a flexible, deformable gasket that provides a <span class="hlt">fluid</span>-tight chamber to confine kerf generated during the drilling and tapping of the hole. The invention also includes a <span class="hlt">fluid</span> extractor section for extracting <span class="hlt">fluid</span> samples from the <span class="hlt">fluid</span> collecting section.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li class="active"><span>14</span></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_14 --> <div id="page_15" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li class="active"><span>15</span></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="281"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20090041685','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20090041685"><span><span class="hlt">Core</span>-Cutoff Tool</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Gheen, Darrell</p> <p>2007-01-01</p> <p>A tool makes a cut perpendicular to the cylindrical axis of a <span class="hlt">core</span> hole at a predetermined depth to free the <span class="hlt">core</span> at that depth. The tool does not damage the surrounding material from which the <span class="hlt">core</span> was cut, and it operates within the <span class="hlt">core</span>-hole kerf. <span class="hlt">Coring</span> usually begins with use of a hole saw or a hollow cylindrical abrasive cutting tool to make an annular hole that leaves the <span class="hlt">core</span> (sometimes called the plug ) in place. In this approach to <span class="hlt">coring</span> as practiced heretofore, the <span class="hlt">core</span> is removed forcibly in a manner chosen to shear the <span class="hlt">core</span>, preferably at or near the greatest depth of the <span class="hlt">core</span> hole. Unfortunately, such forcible removal often damages both the <span class="hlt">core</span> and the surrounding material (see Figure 1). In an alternative prior approach, especially applicable to toxic or fragile material, a <span class="hlt">core</span> is formed and freed by means of milling operations that generate much material waste. In contrast, the present tool eliminates the damage associated with the hole-saw approach and reduces the extent of milling operations (and, hence, reduces the waste) associated with the milling approach. The present tool (see Figure 2) includes an inner sleeve and an outer sleeve and resembles the hollow cylindrical tool used to cut the <span class="hlt">core</span> hole. The sleeves are thin enough that this tool fits within the kerf of the <span class="hlt">core</span> hole. The inner sleeve is attached to a shaft that, in turn, can be attached to a drill motor or handle for turning the tool. This tool also includes a cutting wire attached to the distal ends of both sleeves. The cutting wire is long enough that with sufficient relative rotation of the inner and outer sleeves, the wire can cut all the way to the center of the <span class="hlt">core</span>. The tool is inserted in the kerf until its distal end is seated at the full depth. The inner sleeve is then turned. During turning, frictional drag on the outer <span class="hlt">core</span> pulls the cutting wire into contact with the <span class="hlt">core</span>. The cutting force of the wire against the <span class="hlt">core</span> increases with the tension in the wire and</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/5211302','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/5211302"><span>Permeability damage to natural fractures caused by fracturing <span class="hlt">fluid</span> polymers</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Gall, B.L.; Sattler, A.R.; Maloney, D.R.; Raible, C.J.</p> <p>1988-04-01</p> <p>Formation damage studies using artificially fractured, low-permeability sandstone <span class="hlt">cores</span> indicate that viscosified fracturing <span class="hlt">fluids</span> can severely restrict gas flow through these types of narrow fractures. These studies were performed in support of the Department of Energy's Multiwell Experiment (MWX). Extensive geological and production evaluations at the MWX site indicate that the presence of a natural fracture system is largely responsible for unstimulated gas production. The laboratory formation damage studies were designed to examine changes in cracked <span class="hlt">core</span> permeability to gas caused by fracturing <span class="hlt">fluid</span> residues introduced into such narrow fractures during <span class="hlt">fluid</span> leakoff. Polysaccharide polymers caused significant reduction (up to 95%) to gas flow through cracked <span class="hlt">cores</span>. Polymer fracturing <span class="hlt">fluid</span> gels used in this study included hydroxypropyl guar, hydroxyethyl cellulose, and xanthan gum. In contrast, polyacrylamide gels caused little or no reduction in gas flow through cracked <span class="hlt">cores</span> after liquid cleanup. Other components of fracturing <span class="hlt">fluids</span> (surfactants, breakers, etc.) caused less damage to gas flows. Other factors affecting gas flow through cracked <span class="hlt">cores</span> were investigated, including the effects of net confining stress and non-Darcy flow parameters. Results are related to some of the problems observed during the stimulation program conducted for the MWX. 24 refs., 4 figs., 7 tabs.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/4284355','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/biblio/4284355"><span>NEUTRONIC REACTOR FUEL ELEMENT AND <span class="hlt">CORE</span> SYSTEM</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Moore, W.T.</p> <p>1958-09-01</p> <p>This patent relates to neutronic reactors and in particular to an improved fuel element and a novel reactor <span class="hlt">core</span> system for facilitating removal of contaminating fission products, as they are fermed, from association with the flssionable fuel, so as to mitigate the interferent effects of such fission products during reactor operation. The fuel elements are comprised of tubular members impervious to <span class="hlt">fluid</span> and contatning on their interior surfaces a thin layer of fissionable material providing a central void. The <span class="hlt">core</span> structure is comprised of a plurality of the tubular fuel elements arranged in parallel and a closed manifold connected to their ends. In the reactor the <span class="hlt">core</span> structure is dispersed in a water moderator and coolant within a pressure vessel, and a means connected to said manifuld is provided for withdrawing and disposing of mobile fission product contamination from the interior of the feel tubes and manifold.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/864287','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/864287"><span><span class="hlt">Fluid</span> force transducer</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Jendrzejczyk, Joseph A.</p> <p>1982-01-01</p> <p>An electrical <span class="hlt">fluid</span> force transducer for measuring the magnitude and direction of <span class="hlt">fluid</span> forces caused by lateral <span class="hlt">fluid</span> flow, includes a movable sleeve which is deflectable in response to the movement of <span class="hlt">fluid</span>, and a rod fixed to the sleeve to translate forces applied to the sleeve to strain gauges attached to the rod, the strain gauges being connected in a bridge circuit arrangement enabling generation of a signal output indicative of the magnitude and direction of the force applied to the sleeve.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=fluids&pg=2&id=EJ993744','ERIC'); return false;" href="https://eric.ed.gov/?q=fluids&pg=2&id=EJ993744"><span><span class="hlt">Fluid</span> Movement and Creativity</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Slepian, Michael L.; Ambady, Nalini</p> <p>2012-01-01</p> <p>Cognitive scientists describe creativity as <span class="hlt">fluid</span> thought. Drawing from findings on gesture and embodied cognition, we hypothesized that the physical experience of fluidity, relative to nonfluidity, would lead to more <span class="hlt">fluid</span>, creative thought. Across 3 experiments, <span class="hlt">fluid</span> arm movement led to enhanced creativity in 3 domains: creative generation,…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=lead+AND+generation&pg=6&id=EJ993744','ERIC'); return false;" href="http://eric.ed.gov/?q=lead+AND+generation&pg=6&id=EJ993744"><span><span class="hlt">Fluid</span> Movement and Creativity</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Slepian, Michael L.; Ambady, Nalini</p> <p>2012-01-01</p> <p>Cognitive scientists describe creativity as <span class="hlt">fluid</span> thought. Drawing from findings on gesture and embodied cognition, we hypothesized that the physical experience of fluidity, relative to nonfluidity, would lead to more <span class="hlt">fluid</span>, creative thought. Across 3 experiments, <span class="hlt">fluid</span> arm movement led to enhanced creativity in 3 domains: creative generation,…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015MNRAS.450.1638G','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015MNRAS.450.1638G"><span>Persistent crust-<span class="hlt">core</span> spin lag in neutron stars</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Glampedakis, Kostas; Lasky, Paul D.</p> <p>2015-06-01</p> <p>It is commonly believed that the magnetic field threading a neutron star provides the ultimate mechanism (on top of <span class="hlt">fluid</span> viscosity) for enforcing long-term corotation between the slowly spun-down solid crust and the liquid <span class="hlt">core</span>. We show that this argument fails for axisymmetric magnetic fields with closed field lines in the <span class="hlt">core</span>, the commonly used `twisted torus' field being the most prominent example. The failure of such magnetic fields to enforce global crust-<span class="hlt">core</span> corotation leads to the development of a persistent spin lag between the <span class="hlt">core</span> region occupied by the closed field lines and the rest of the crust and <span class="hlt">core</span>. We discuss the repercussions of this spin lag for the evolution of the magnetic field, suggesting that, in order for a neutron star to settle to a stable state of crust-<span class="hlt">core</span> corotation, the bulk of the toroidal field component should be deposited into the crust soon after the neutron star's birth.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19900014424','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19900014424"><span><span class="hlt">Core</span> sample extractor</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Akins, James; Cobb, Billy; Hart, Steve; Leaptrotte, Jeff; Milhollin, James; Pernik, Mark</p> <p>1989-01-01</p> <p>The problem of retrieving and storing <span class="hlt">core</span> samples from a hole drilled on the lunar surface is addressed. The total depth of the hole in question is 50 meters with a maximum diameter of 100 millimeters. The <span class="hlt">core</span> sample itself has a diameter of 60 millimeters and will be two meters in length. It is therefore necessary to retrieve and store 25 <span class="hlt">core</span> samples per hole. The design utilizes a control system that will stop the mechanism at a certain depth, a cam-linkage system that will fracture the <span class="hlt">core</span>, and a storage system that will save and catalogue the <span class="hlt">cores</span> to be extracted. The Rod Changer and Storage Design Group will provide the necessary tooling to get into the hole as well as to the <span class="hlt">core</span>. The mechanical design for the cam-linkage system as well as the conceptual design of the storage device are described.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26356967','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26356967"><span>Vortex <span class="hlt">Cores</span> of Inertial Particles.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Günther, Tobias; Theisel, Holger</p> <p>2014-12-01</p> <p>The <span class="hlt">cores</span> of massless, swirling particle motion are an indicator for vortex-like behavior in vector fields and to this end, a number of coreline extractors have been proposed in the literature. Though, many practical applications go beyond the study of the vector field. Instead, engineers seek to understand the behavior of inertial particles moving therein, for instance in sediment transport, helicopter brownout and pulverized coal combustion. In this paper, we present two strategies for the extraction of the corelines that inertial particles swirl around, which depend on particle density, particle diameter, <span class="hlt">fluid</span> viscosity and gravity. The first is to deduce the local swirling behavior from the autonomous inertial motion ODE, which eventually reduces to a parallel vectors operation. For the second strategy, we use a particle density estimation to locate inertial attractors. With this, we are able to extract the <span class="hlt">cores</span> of swirling inertial particle motion for both steady and unsteady 3D vector fields. We demonstrate our techniques in a number of benchmark data sets, and elaborate on the relation to traditional massless corelines.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22540454','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22540454"><span>Rocky <span class="hlt">core</span> solubility in Jupiter and giant exoplanets.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wilson, Hugh F; Militzer, Burkhard</p> <p>2012-03-16</p> <p>Gas giants are believed to form by the accretion of hydrogen-helium gas around an initial protocore of rock and ice. The question of whether the rocky parts of the <span class="hlt">core</span> dissolve into the <span class="hlt">fluid</span> H-He layers following formation has significant implications for planetary structure and evolution. Here we use ab initio calculations to study rock solubility in <span class="hlt">fluid</span> hydrogen, choosing MgO as a representative example of planetary rocky materials, and find MgO to be highly soluble in H for temperatures in excess of approximately 10,000 K, implying the potential for significant redistribution of rocky <span class="hlt">core</span> material in Jupiter and larger exoplanets.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22762472','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22762472"><span>Goal directed <span class="hlt">fluid</span> therapy.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Marik, Paul E; Desai, Himanshu</p> <p>2012-01-01</p> <p>The cornerstone of treating patients with shock remains as it has for decades, intravenous <span class="hlt">fluids</span>. Surprisingly, dosing intravenous <span class="hlt">fluid</span> during resuscitation of shock remains largely empirical. Recent data suggests that early aggressive resuscitation of critically ill patients may limit and/or reverse tissue hypoxia, progression to organ failure and improve outcome. However, overzealous <span class="hlt">fluid</span> resuscitation has been associated with increased complications, increased length of intensive care unit (ICU) and hospital stay and increased mortality. This review focuses on methods to assess <span class="hlt">fluid</span> responsiveness and the application of these methods for goal directed <span class="hlt">fluid</span> therapy in critically ill and peri-operative patients.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.usgs.gov/gip/94/','USGSPUBS'); return false;" href="https://pubs.usgs.gov/gip/94/"><span><span class="hlt">Core</span> Research Center</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Hicks, Joshua; Adrian, Betty</p> <p>2009-01-01</p> <p>The <span class="hlt">Core</span> Research Center (CRC) of the U.S. Geological Survey (USGS), located at the Denver Federal Center in Lakewood, Colo., currently houses rock <span class="hlt">core</span> from more than 8,500 boreholes representing about 1.7 million feet of rock <span class="hlt">core</span> from 35 States and cuttings from 54,000 boreholes representing 238 million feet of drilling in 28 States. Although most of the boreholes are located in the Rocky Mountain region, the geologic and geographic diversity of samples have helped the CRC become one of the largest and most heavily used public <span class="hlt">core</span> repositories in the United States. Many of the boreholes represented in the collection were drilled for energy and mineral exploration, and many of the <span class="hlt">cores</span> and cuttings were donated to the CRC by private companies in these industries. Some <span class="hlt">cores</span> and cuttings were collected by the USGS along with other government agencies. Approximately one-half of the <span class="hlt">cores</span> are slabbed and photographed. More than 18,000 thin sections and a large volume of analytical data from the <span class="hlt">cores</span> and cuttings are also accessible. A growing collection of digital images of the <span class="hlt">cores</span> are also becoming available on the CRC Web site Internet http://geology.cr.usgs.gov/crc/.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2004PhDT.......155A','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2004PhDT.......155A"><span>Adaptive <span class="hlt">core</span> simulation</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Abdel-Khalik, Hany Samy</p> <p></p> <p>The work presented in this thesis is a continuation of a master's thesis research project conducted by the author to gain insight into the applicability of inverse methods to developing adaptive simulation capabilities for <span class="hlt">core</span> physics problems. Use of adaptive simulation is intended to improve the fidelity and robustness of important <span class="hlt">core</span> attributes predictions such as <span class="hlt">core</span> power distribution, thermal margins and <span class="hlt">core</span> reactivity. Adaptive simulation utilizes a selected set of past and current reactor measurements of reactor observables, i.e. in-<span class="hlt">core</span> instrumentations readings, to adapt the simulation in a meaningful way. A meaningful adaption will result in high fidelity and robust adapted <span class="hlt">core</span> simulators models. To perform adaption, we propose an inverse theory approach in which the multitudes of input data to <span class="hlt">core</span> simulators, i.e. reactor physics and thermal-hydraulic data, are to be adjusted to improve agreement with measured observables while keeping <span class="hlt">core</span> simulators models unadapted. At a first glance, devising such adaption for typical <span class="hlt">core</span> simulators models would render the approach impractical. This follows, since <span class="hlt">core</span> simulators are based on very demanding computational models, i.e. based on complex physics models with millions of input data and output observables. This would spawn not only several prohibitive challenges but also numerous disparaging concerns. The challenges include the computational burdens of the sensitivity-type calculations required to construct Jacobian operators for the <span class="hlt">core</span> simulators models. Also, the computational burdens of the uncertainty-type calculations required to estimate the uncertainty information of <span class="hlt">core</span> simulators input data presents a demanding challenge. The concerns however are mainly related to the reliability of the adjusted input data. We demonstrate that the power of our proposed approach is mainly driven by taking advantage of this unfavorable situation. Our contribution begins with the realization that to obtain</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/825229','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/825229"><span>LUBRICATED TRANSPORT OF VISCOUS <span class="hlt">FLUIDS</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>JOSEPH, DANIEL D</p> <p>2004-06-21</p> <p>We became the acknowledged world leaders in the science fundamentals of the technology of water lubricated pipelines focusing on stability, numerical and experimental studies. We completed the first direct numerical simulation of axisymmetric <span class="hlt">core</span> flow. We showed that the pressure at the front of the wave is large (the <span class="hlt">fluid</span> enters a converging region) and it pushes the interface in, steepening the wave at its front. At the backside of the wave, behind the crest, the pressure is low (diverging flow) and it pulls the interface to the wall, smoothing the backside of the wave. The steepening of the wave can be regarded as a shock up by inertia and it shows that dynamics works against the formation of long waves which are often assumed but not justified in the analysis of such problems. We showed that the steep wave persists even as the gap between the <span class="hlt">core</span> and the wall decreases to zero. The wave length also decreases in proportion, so that the wave shape is preserved in this limit. This leads to the first mathematical solution giving rise sharkskin. The analysis also showed that there is a threshold Reynolds number below which the total force reckoned relative to a zero at the wave crest is negative, positive above, and we conjectured, therefore that inertia is required to center a density matched <span class="hlt">core</span> and to levitate the <span class="hlt">core</span> off the wall when the density is not matched. Other work relates to self-lubricated transport of bitumen froth and self-lubricated transport of bitumen froth.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20110007235','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20110007235"><span>Seismic Detection of the Layers of the Lunar <span class="hlt">Core</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Weber, Renee C.; Garnero, Edward J.; Lin, Pei-Ying; Williams, Quentin; Lognonne, Philippe</p> <p>2010-01-01</p> <p>This slide presentation reviews the analysis of Apollo-era seismic data and indirect geophysical measurements (i.e., moment of inertia, lunar laser ranging and electromagnetic induction) and concludes that significant questions still remain. The Apollo deep moonquake seismograms using terrestrial array processing methods is analyzed to infer the structure of the lunar <span class="hlt">core</span>. The results indicate the presence of a solid inner and <span class="hlt">fluid</span> outer <span class="hlt">core</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23208618','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23208618"><span><span class="hlt">Core</span>-shell hydrogel microcapsules for improved islets encapsulation.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Ma, Minglin; Chiu, Alan; Sahay, Gaurav; Doloff, Joshua C; Dholakia, Nimit; Thakrar, Raj; Cohen, Joshua; Vegas, Arturo; Chen, Delai; Bratlie, Kaitlin M; Dang, Tram; York, Roger L; Hollister-Lock, Jennifer; Weir, Gordon C; Anderson, Daniel G</p> <p>2013-05-01</p> <p>Islets microencapsulation holds great promise to treat type 1 diabetes. Currently used alginate microcapsules often have islets protruding outside capsules, leading to inadequate immuno-protection. A novel design of microcapsules with <span class="hlt">core</span>-shell structures using a two-<span class="hlt">fluid</span> co-axial electro-jetting is reported. Improved encapsulation and diabetes correction is achieved in a single step by simply confining the islets in the <span class="hlt">core</span> region of the capsules.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1176099','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1176099"><span><span class="hlt">Fluid</span> cooled electrical assembly</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Rinehart, Lawrence E.; Romero, Guillermo L.</p> <p>2007-02-06</p> <p>A heat producing, <span class="hlt">fluid</span> cooled assembly that includes a housing made of liquid-impermeable material, which defines a <span class="hlt">fluid</span> inlet and a <span class="hlt">fluid</span> outlet and an opening. Also included is an electrical package having a set of semiconductor electrical devices supported on a substrate and the second major surface is a heat sink adapted to express heat generated from the electrical apparatus and wherein the second major surface defines a rim that is fit to the opening. Further, the housing is constructed so that as <span class="hlt">fluid</span> travels from the <span class="hlt">fluid</span> inlet to the <span class="hlt">fluid</span> outlet it is constrained to flow past the opening thereby placing the <span class="hlt">fluid</span> in contact with the heat sink.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1080313','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1080313"><span>Spinning <span class="hlt">fluids</span> reactor</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Miller, Jan D; Hupka, Jan; Aranowski, Robert</p> <p>2012-11-20</p> <p>A spinning <span class="hlt">fluids</span> reactor, includes a reactor body (24) having a circular cross-section and a <span class="hlt">fluid</span> contactor screen (26) within the reactor body (24). The <span class="hlt">fluid</span> contactor screen (26) having a plurality of apertures and a circular cross-section concentric with the reactor body (24) for a length thus forming an inner volume (28) bound by the <span class="hlt">fluid</span> contactor screen (26) and an outer volume (30) bound by the reactor body (24) and the <span class="hlt">fluid</span> contactor screen (26). A primary inlet (20) can be operatively connected to the reactor body (24) and can be configured to produce flow-through first spinning flow of a first <span class="hlt">fluid</span> within the inner volume (28). A secondary inlet (22) can similarly be operatively connected to the reactor body (24) and can be configured to produce a second flow of a second <span class="hlt">fluid</span> within the outer volume (30) which is optionally spinning.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3747278','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3747278"><span>Perioperative <span class="hlt">Fluid</span> Restriction</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Bleier, Joshua I.S.; Aarons, Cary B.</p> <p>2013-01-01</p> <p>Perioperative <span class="hlt">fluid</span> management of the colorectal surgical patient has evolved significantly over the last five decades. Older notions espousing aggressive hydration have been shown to be associated with increased complications. Newer data regarding <span class="hlt">fluid</span> restriction has shown an association with improved outcomes. Management of perioperative <span class="hlt">fluid</span> administration can be considered in three primary phases: In the preoperative phase, data suggests that avoidance of preoperative bowel preparation and avoidance of undue preoperative dehydration can improve outcomes. Although the type of intraoperative <span class="hlt">fluid</span> given does not have a significant effect on outcome, data do suggest that a restrictive <span class="hlt">fluid</span> regimen results in improved outcomes. Finally, in the postoperative phase of <span class="hlt">fluid</span> management, a <span class="hlt">fluid</span>-restrictive regimen, coupled with early enteral feeding also seems to result in improved outcomes. PMID:24436675</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27900717','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27900717"><span>Intravenous <span class="hlt">fluids</span>: balancing solutions.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Hoorn, Ewout J</p> <p>2017-08-01</p> <p>The topic of intravenous (IV) <span class="hlt">fluids</span> may be regarded as "reverse nephrology", because nephrologists usually treat to remove <span class="hlt">fluids</span> rather than to infuse them. However, because nephrology is deeply rooted in <span class="hlt">fluid</span>, electrolyte, and acid-base balance, IV <span class="hlt">fluids</span> belong in the realm of our specialty. The field of IV <span class="hlt">fluid</span> therapy is in motion due to the increasing use of balanced crystalloids, partly fueled by the advent of new solutions. This review aims to capture these recent developments by critically evaluating the current evidence base. It will review both indications and complications of IV <span class="hlt">fluid</span> therapy, including the characteristics of the currently available solutions. It will also cover the use of IV <span class="hlt">fluids</span> in specific settings such as kidney transplantation and pediatrics. Finally, this review will address the pathogenesis of saline-induced hyperchloremic acidosis, its potential effect on outcomes, and the question if this should lead to a definitive switch to balanced solutions.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li class="active"><span>15</span></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_15 --> <div id="page_16" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li class="active"><span>16</span></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="301"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=rehabilitation&id=EJ1110561','ERIC'); return false;" href="http://eric.ed.gov/?q=rehabilitation&id=EJ1110561"><span>Can Psychiatric Rehabilitation Be <span class="hlt">Core</span> to <span class="hlt">CORE</span>?</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Olney, Marjorie F.; Gill, Kenneth J.</p> <p>2016-01-01</p> <p>Purpose: In this article, we seek to determine whether psychiatric rehabilitation principles and practices have been more fully incorporated into the Council on Rehabilitation Education (<span class="hlt">CORE</span>) standards, the extent to which they are covered in four rehabilitation counseling "foundations" textbooks, and how they are reflected in the…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=core&pg=4&id=EJ1110561','ERIC'); return false;" href="https://eric.ed.gov/?q=core&pg=4&id=EJ1110561"><span>Can Psychiatric Rehabilitation Be <span class="hlt">Core</span> to <span class="hlt">CORE</span>?</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Olney, Marjorie F.; Gill, Kenneth J.</p> <p>2016-01-01</p> <p>Purpose: In this article, we seek to determine whether psychiatric rehabilitation principles and practices have been more fully incorporated into the Council on Rehabilitation Education (<span class="hlt">CORE</span>) standards, the extent to which they are covered in four rehabilitation counseling "foundations" textbooks, and how they are reflected in the…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2010AGUFMMR14A..02N','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2010AGUFMMR14A..02N"><span>Planetary <span class="hlt">cores</span>: a geodynamic perspective (Invited)</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Nimmo, F.</p> <p>2010-12-01</p> <p>How can measurements of planetary <span class="hlt">core</span> materials improve our understanding of their geodynamical behaviour? Here I will focus on three aspects of this questions: 1) <span class="hlt">core</span> formation; 2) the growth and rheology of solid <span class="hlt">cores</span>; 3) dynamo activity. <span class="hlt">Core</span> formation occurs either due to the heat generated by short-lived nuclides (for small bodies) or due to gravitational energy released during impacts (for large bodies) [1]. <span class="hlt">Core</span> formation results in elemental fractionation; such fractionation depends on P,T and oxygen fugacity [2], and for Earth-mass bodies occurs as a succession of discrete events. Experimental measurements of siderophile element partition coefficients are necessary to infer conditions during accretion, though these inferences are non-unique [3]. <span class="hlt">Core</span> formation may also lead to isotopic fractionation of elements such as Si [4] and Fe [5], although the latter in particular is currently uncertain and merits further experimental investigation. <span class="hlt">Core</span> solidification depends on the slopes of the adiabat and melting curve, and on the concentration and nature of the light element(s) present [6,7]. Solidification may proceed from outside in (for small bodies) or from inside out (for larger bodies); the solid may be either lighter or heavier than the <span class="hlt">fluid</span>, depending on the <span class="hlt">core</span> composition. Thus, <span class="hlt">core</span> solidification is complex and poorly understood; for instance, Ganymede and Mercury’s <span class="hlt">cores</span> may be in a completely different solidification regime to that of the Earth [8,9]. Solidification can also vary spatially, giving rise to inner <span class="hlt">core</span> seismological structure [10,11]. The viscosity of a solid inner <span class="hlt">core</span> is an important and poorly constrained parameter [12] which controls <span class="hlt">core</span> deformation, <span class="hlt">core</span>-mantle coupling and tidal heating. Super-Earths probably lack solid inner <span class="hlt">cores</span> [13], though further high-P experimental data are needed. <span class="hlt">Core</span> dynamos are usually thought to be driven by compositional or thermal buoyancy [14] , with the former effect dominant for small</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=educational+AND+standards+AND+american&pg=6&id=EJ1063965','ERIC'); return false;" href="http://eric.ed.gov/?q=educational+AND+standards+AND+american&pg=6&id=EJ1063965"><span>More on the <span class="hlt">Core</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Chan, Monnica</p> <p>2013-01-01</p> <p>From a higher education perspective, new "Common <span class="hlt">Core</span>" standards could improve student college-readiness levels, reduce institutional remediation rates, and close education gaps in and between states. As a national initiative to create common educational standards for students across multiple states, the Common <span class="hlt">Core</span> State Standards…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016DPS....4811703D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016DPS....4811703D"><span>Mercury's <span class="hlt">core</span> evolution</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Deproost, Marie-Hélène; Rivoldini, Attilio; Van Hoolst, Tim</p> <p>2016-10-01</p> <p>Remote sensing data of Mercury's surface by MESSENGER indicate that Mercury formed under reducing conditions. As a consequence, silicon is likely the main light element in the <span class="hlt">core</span> together with a possible small fraction of sulfur. Compared to sulfur, which does almost not partition into solid iron at Mercury's <span class="hlt">core</span> conditions and strongly decreases the melting temperature, silicon partitions almost equally well between solid and liquid iron and is not very effective at reducing the melting temperature of iron. Silicon as the major light element constituent instead of sulfur therefore implies a significantly higher <span class="hlt">core</span> liquidus temperature and a decrease in the vigor of compositional convection generated by the release of light elements upon inner <span class="hlt">core</span> formation.Due to the immiscibility in liquid Fe-Si-S at low pressure (below 15 GPa), the <span class="hlt">core</span> might also not be homogeneous and consist of an inner S-poor Fe-Si <span class="hlt">core</span> below a thinner Si-poor Fe-S layer. Here, we study the consequences of a silicon-rich <span class="hlt">core</span> and the effect of the blanketing Fe-S layer on the thermal evolution of Mercury's <span class="hlt">core</span> and on the generation of a magnetic field.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Glaciers&pg=3&id=EJ572533','ERIC'); return false;" href="http://eric.ed.gov/?q=Glaciers&pg=3&id=EJ572533"><span>Making an Ice <span class="hlt">Core</span>.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Kopaska-Merkel, David C.</p> <p>1995-01-01</p> <p>Explains an activity in which students construct a simulated ice <span class="hlt">core</span>. Materials required include only a freezer, food coloring, a bottle, and water. This hands-on exercise demonstrates how a glacier is formed, how ice <span class="hlt">cores</span> are studied, and the nature of precision and accuracy in measurement. Suitable for grades three through eight. (Author/PVD)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Glaciers&id=EJ809662','ERIC'); return false;" href="http://eric.ed.gov/?q=Glaciers&id=EJ809662"><span>Ice <span class="hlt">Core</span> Investigations</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Krim, Jessica; Brody, Michael</p> <p>2008-01-01</p> <p>What can glaciers tell us about volcanoes and atmospheric conditions? How does this information relate to our understanding of climate change? Ice <span class="hlt">Core</span> Investigations is an original and innovative activity that explores these types of questions. It brings together popular science issues such as research, climate change, ice <span class="hlt">core</span> drilling, and air…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=industrial+AND+communication+AND+networks&pg=6&id=ED207612','ERIC'); return false;" href="http://eric.ed.gov/?q=industrial+AND+communication+AND+networks&pg=6&id=ED207612"><span>NFE <span class="hlt">Core</span> Bibliographies.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Michigan State Univ., East Lansing. Inst. for International Studies in Education.</p> <p></p> <p>This collection of <span class="hlt">core</span> bibliographies, which expands on an initial bibliography published in 1979 of the <span class="hlt">core</span> resources housed in the Non-Formal Education Information Center at Michigan State University, comprises a basic stock of materials on nonformal education and women in development that have been contributed by development planners,…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=drilling&pg=2&id=EJ809662','ERIC'); return false;" href="https://eric.ed.gov/?q=drilling&pg=2&id=EJ809662"><span>Ice <span class="hlt">Core</span> Investigations</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Krim, Jessica; Brody, Michael</p> <p>2008-01-01</p> <p>What can glaciers tell us about volcanoes and atmospheric conditions? How does this information relate to our understanding of climate change? Ice <span class="hlt">Core</span> Investigations is an original and innovative activity that explores these types of questions. It brings together popular science issues such as research, climate change, ice <span class="hlt">core</span> drilling, and air…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=Participating+AND+Local+AND+Government&pg=4&id=EJ1063965','ERIC'); return false;" href="https://eric.ed.gov/?q=Participating+AND+Local+AND+Government&pg=4&id=EJ1063965"><span>More on the <span class="hlt">Core</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Chan, Monnica</p> <p>2013-01-01</p> <p>From a higher education perspective, new "Common <span class="hlt">Core</span>" standards could improve student college-readiness levels, reduce institutional remediation rates, and close education gaps in and between states. As a national initiative to create common educational standards for students across multiple states, the Common <span class="hlt">Core</span> State Standards…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/1231229','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/1231229"><span><span class="hlt">CORE</span> - Performance Feedback System</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p></p> <p>2009-10-02</p> <p><span class="hlt">CORE</span> is an architecture to bridge the gaps between disparate data integration and delivery of disparate information visualization. The <span class="hlt">CORE</span> Technology Program includes a suite of tools and user-centered staff that can facilitate rapid delivery of a deployable integrated information to users.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/5383815','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/5383815"><span>Modular <span class="hlt">core</span> holder</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Mueller, J.; Cole, C.W.; Hamid, S.; Lucas, J.K.</p> <p>1991-03-05</p> <p>This patent describes a modular <span class="hlt">core</span> holder. It comprises: a sleeve, forming an internal cavity for receiving a <span class="hlt">core</span>. The sleeve including segments; support means, overlying the sleeve, for supporting the sleeve; and access means, positioned between at least two of the segments of the sleeve, for allowing measurement of conditions within the internal cavity.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=glaciers&pg=3&id=EJ572533','ERIC'); return false;" href="https://eric.ed.gov/?q=glaciers&pg=3&id=EJ572533"><span>Making an Ice <span class="hlt">Core</span>.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Kopaska-Merkel, David C.</p> <p>1995-01-01</p> <p>Explains an activity in which students construct a simulated ice <span class="hlt">core</span>. Materials required include only a freezer, food coloring, a bottle, and water. This hands-on exercise demonstrates how a glacier is formed, how ice <span class="hlt">cores</span> are studied, and the nature of precision and accuracy in measurement. Suitable for grades three through eight. (Author/PVD)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED561977.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED561977.pdf"><span>Iowa <span class="hlt">Core</span> Annual Report</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Iowa Department of Education, 2015</p> <p>2015-01-01</p> <p>One central component of a great school system is a clear set of expectations, or standards, that educators help all students reach. In Iowa, that effort is known as the Iowa <span class="hlt">Core</span>. The Iowa <span class="hlt">Core</span> represents the statewide academic standards, which describe what students should know and be able to do in math, science, English language arts, and…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/5289935','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/5289935"><span><span class="hlt">Fluid</span> sampling pump</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Allen, P.V.; Nimberger, S.M.; Ward, R.L.</p> <p>1992-03-03</p> <p>This patent describes a pump for pumping a preselected quantity of <span class="hlt">fluid</span> with each pump driving stroke from a <span class="hlt">fluid</span> inlet port to a <span class="hlt">fluid</span> outlet port, an inlet valve for selectively controlling <span class="hlt">fluid</span> flow through the <span class="hlt">fluid</span> inlet port, a pump body defining a pump bore therein, a piston slidably movable within the pump bore and having a <span class="hlt">fluid</span> inlet end and an opposing operator end, an operator unit for reciprocating the piston within the pump bore, and a manifold interconnect with the pump body. It comprises a flow path therein extending from a manifold inlet port to a manifold outlet port, flow path being in communication with the <span class="hlt">fluid</span> outlet port in the pump body, a purge passageway extending from the flow path to the outlet passageway, a purge valve for regulating <span class="hlt">fluid</span> flow through the purge passageway, and a filter positioned within the manifold and extending across a portion of the flow path, the filter defining a filtered zone within the flow path adjoining the inlet port in the pump body, and an unfiltered zone within the flow path extending from the manifold inlet to the manifold outlet, such that filtered <span class="hlt">fluid</span> enters the pump bore while unfiltered <span class="hlt">fluid</span> bypasses the filter and passes out the manifold outlet port.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/22277854','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/22277854"><span>A star harbouring a wormhole at its <span class="hlt">core</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Dzhunushaliev, Vladimir; Folomeev, Vladimir; Kleihaus, Burkhard; Kunz, Jutta E-mail: vfolomeev@mail.ru E-mail: kunz@theorie.physik.uni-oldenburg.de</p> <p>2011-04-01</p> <p>We consider a configuration consisting of a wormhole filled by a perfect <span class="hlt">fluid</span>. Such a model can be applied to describe stars as well as neutron stars with a nontrivial topology. The presence of a tunnel allows for motion of the <span class="hlt">fluid</span>, including oscillations near the <span class="hlt">core</span> of the system. Choosing the polytropic equation of state for the perfect <span class="hlt">fluid</span>, we obtain static regular solutions. Based on these solutions, we consider small radial oscillations of the configuration and show that the solutions are stable with respect to linear perturbations in the external region.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=20010090463&hterms=Geodynamo&qs=N%3D0%26Ntk%3DAll%26Ntx%3Dmode%2Bmatchall%26Ntt%3DGeodynamo','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=20010090463&hterms=Geodynamo&qs=N%3D0%26Ntk%3DAll%26Ntx%3Dmode%2Bmatchall%26Ntt%3DGeodynamo"><span>Geodynamo Modeling of <span class="hlt">Core</span>-Mantle Interactions</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Kuang, Wei-Jia; Chao, Benjamin F.; Smith, David E. (Technical Monitor)</p> <p>2001-01-01</p> <p>Angular momentum exchange between the Earth's mantle and <span class="hlt">core</span> influences the Earth's rotation on time scales of decades and longer, in particular in the length of day (LOD) which have been measured with progressively increasing accuracy for the last two centuries. There are four possible coupling mechanisms for transferring the axial angular momentum across the <span class="hlt">core</span>-mantle boundary (CMB): viscous, magnetic, topography, and gravitational torques. Here we use our scalable, modularized, fully dynamic geodynamo model for the <span class="hlt">core</span> to assess the importance of these torques. This numerical model, as an extension of the Kuang-Bloxham model that has successfully simulated the generation of the Earth's magnetic field, is used to obtain numerical results in various physical conditions in terms of specific parameterization consistent with the dynamical processes in the <span class="hlt">fluid</span> outer <span class="hlt">core</span>. The results show that depending on the electrical conductivity of the lower mantle and the amplitude of the boundary topography at CMB, both magnetic and topographic couplings can contribute significantly to the angular momentum exchange. This implies that the <span class="hlt">core</span>-mantle interactions are far more complex than has been assumed and that there is unlikely a single dominant coupling mechanism for the observed decadal LOD variation.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=20010090463&hterms=interactions+gravitational&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3Dinteractions%2Bgravitational','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=20010090463&hterms=interactions+gravitational&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3Dinteractions%2Bgravitational"><span>Geodynamo Modeling of <span class="hlt">Core</span>-Mantle Interactions</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Kuang, Wei-Jia; Chao, Benjamin F.; Smith, David E. (Technical Monitor)</p> <p>2001-01-01</p> <p>Angular momentum exchange between the Earth's mantle and <span class="hlt">core</span> influences the Earth's rotation on time scales of decades and longer, in particular in the length of day (LOD) which have been measured with progressively increasing accuracy for the last two centuries. There are four possible coupling mechanisms for transferring the axial angular momentum across the <span class="hlt">core</span>-mantle boundary (CMB): viscous, magnetic, topography, and gravitational torques. Here we use our scalable, modularized, fully dynamic geodynamo model for the <span class="hlt">core</span> to assess the importance of these torques. This numerical model, as an extension of the Kuang-Bloxham model that has successfully simulated the generation of the Earth's magnetic field, is used to obtain numerical results in various physical conditions in terms of specific parameterization consistent with the dynamical processes in the <span class="hlt">fluid</span> outer <span class="hlt">core</span>. The results show that depending on the electrical conductivity of the lower mantle and the amplitude of the boundary topography at CMB, both magnetic and topographic couplings can contribute significantly to the angular momentum exchange. This implies that the <span class="hlt">core</span>-mantle interactions are far more complex than has been assumed and that there is unlikely a single dominant coupling mechanism for the observed decadal LOD variation.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/11449282','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/11449282"><span>Mars' <span class="hlt">core</span> and magnetism.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Stevenson, D J</p> <p>2001-07-12</p> <p>The detection of strongly magnetized ancient crust on Mars is one of the most surprising outcomes of recent Mars exploration, and provides important insight about the history and nature of the martian <span class="hlt">core</span>. The iron-rich <span class="hlt">core</span> probably formed during the hot accretion of Mars approximately 4.5 billion years ago and subsequently cooled at a rate dictated by the overlying mantle. A <span class="hlt">core</span> dynamo operated much like Earth's current dynamo, but was probably limited in duration to several hundred million years. The early demise of the dynamo could have arisen through a change in the cooling rate of the mantle, or even a switch in convective style that led to mantle heating. Presently, Mars probably has a liquid, conductive outer <span class="hlt">core</span> and might have a solid inner <span class="hlt">core</span> like Earth.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/862581','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/862581"><span>Internal <span class="hlt">core</span> tightener</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Brynsvold, Glen V.; Snyder, Jr., Harold J.</p> <p>1976-06-22</p> <p>An internal <span class="hlt">core</span> tightener which is a linear actuated (vertical actuation motion) expanding device utilizing a minimum of moving parts to perform the lateral tightening function. The key features are: (1) large contact areas to transmit loads during reactor operation; (2) actuation cam surfaces loaded only during clamping and unclamping operation; (3) separation of the parts and internal operation involved in the holding function from those involved in the actuation function; and (4) preloaded pads with compliant travel at each face of the hexagonal assembly at the two clamping planes to accommodate thermal expansion and irradiation induced swelling. The latter feature enables use of a "fixed" outer <span class="hlt">core</span> boundary, and thus eliminates the uncertainty in gross <span class="hlt">core</span> dimensions, and potential for rapid <span class="hlt">core</span> reactivity changes as a result of <span class="hlt">core</span> dimensional change.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li class="active"><span>16</span></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_16 --> <div id="page_17" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li class="active"><span>17</span></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="321"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3426814','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3426814"><span><span class="hlt">Fluid</span> Biomarkers in Alzheimer Disease</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Blennow, Kaj; Zetterberg, Henrik; Fagan, Anne M.</p> <p>2012-01-01</p> <p>Research progress has provided detailed understanding of the molecular pathogenesis of Alzheimer disease (AD). This knowledge has been translated into new drug candidates with putative disease-modifying effects, which are now being tested in clinical trials. The promise of effective therapy has created a great need for biomarkers able to detect AD in the predementia phase, because drugs will probably be effective only if neurodegeneration is not too advanced. In this chapter, cerebrospinal <span class="hlt">fluid</span> (CSF) and plasma biomarkers are reviewed. The <span class="hlt">core</span> CSF biomarkers total tau (T-tau), phosphorylated tau (P-tau) and the 42 amino acid form of β-amyloid (Aβ42) reflect AD pathology, and have high diagnostic accuracy to diagnose AD with dementia and prodromal AD in mild cognitive impairment cases. The rationale for the use of CSF biomarkers to identify and monitor the mechanism of action of new drug candidates is also outlined in this chapter. PMID:22951438</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22951438','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22951438"><span><span class="hlt">Fluid</span> biomarkers in Alzheimer disease.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Blennow, Kaj; Zetterberg, Henrik; Fagan, Anne M</p> <p>2012-09-01</p> <p>Research progress has provided detailed understanding of the molecular pathogenesis of Alzheimer disease (AD). This knowledge has been translated into new drug candidates with putative disease-modifying effects, which are now being tested in clinical trials. The promise of effective therapy has created a great need for biomarkers able to detect AD in the predementia phase, because drugs will probably be effective only if neurodegeneration is not too advanced. In this chapter, cerebrospinal <span class="hlt">fluid</span> (CSF) and plasma biomarkers are reviewed. The <span class="hlt">core</span> CSF biomarkers total tau (T-tau), phosphorylated tau (P-tau) and the 42 amino acid form of β-amyloid (Aβ42) reflect AD pathology, and have high diagnostic accuracy to diagnose AD with dementia and prodromal AD in mild cognitive impairment cases. The rationale for the use of CSF biomarkers to identify and monitor the mechanism of action of new drug candidates is also outlined in this chapter.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19890008242','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19890008242"><span>Space station integrated propulsion and <span class="hlt">fluid</span> systems study. Space station program <span class="hlt">fluid</span> management systems databook</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Bicknell, B.; Wilson, S.; Dennis, M.; Lydon, M.</p> <p>1988-01-01</p> <p>Commonality and integration of propulsion and <span class="hlt">fluid</span> systems associated with the Space Station elements are being evaluated. The Space Station elements consist of the <span class="hlt">core</span> station, which includes habitation and laboratory modules, nodes, airlocks, and trusswork; and associated vehicles, platforms, experiments, and payloads. The program is being performed as two discrete tasks. Task 1 investigated the components of the Space Station architecture to determine the feasibility and practicality of commonality and integration among the various propulsion elements. This task was completed. Task 2 is examining integration and commonality among <span class="hlt">fluid</span> systems which were identified by the Phase B Space Station contractors as being part of the initial operating capability (IOC) and growth Space Station architectures. Requirements and descriptions for reference <span class="hlt">fluid</span> systems were compiled from Space Station documentation and other sources. The <span class="hlt">fluid</span> systems being examined are: an experiment gas supply system, an oxygen/hydrogen supply system, an integrated water system, the integrated nitrogen system, and the integrated waste <span class="hlt">fluids</span> system. Definitions and descriptions of alternate systems were developed, along with analyses and discussions of their benefits and detriments. This databook includes <span class="hlt">fluid</span> systems descriptions, requirements, schematic diagrams, component lists, and discussions of the <span class="hlt">fluid</span> systems. In addition, cost comparison are used in some cases to determine the optimum system for a specific task.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('//www.loc.gov/pictures/collection/hh/item/al1087.photos.046809p/','SCIGOV-HHH'); return false;" href="//www.loc.gov/pictures/collection/hh/item/al1087.photos.046809p/"><span>34. DESPATCH <span class="hlt">CORE</span> OVENS, GREY IRON FOUNDRY <span class="hlt">CORE</span> ROOM, BAKES ...</span></a></p> <p><a target="_blank" href="http://www.loc.gov/pictures/collection/hh/">Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey</a></p> <p></p> <p></p> <p>34. DESPATCH <span class="hlt">CORE</span> OVENS, GREY IRON FOUNDRY <span class="hlt">CORE</span> ROOM, BAKES <span class="hlt">CORES</span> THAT ARE NOT MADE ON HEATED OR COLD BOX <span class="hlt">CORE</span> MACHINES, TO SET BINDING AGENTS MIXED WITH THE SAND CREATING <span class="hlt">CORES</span> HARD ENOUGH TO WITHSTAND THE FLOW OF MOLTEN IRON INSIDE A MOLD. - Stockham Pipe & Fittings Company, Grey Iron Foundry, 4000 Tenth Avenue North, Birmingham, Jefferson County, AL</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22432584','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22432584"><span>Applications of supercritical <span class="hlt">fluids</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Brunner, Gerd</p> <p>2010-01-01</p> <p>This review discusses supercritical <span class="hlt">fluids</span> in industrial and near-to-industry applications. Supercritical <span class="hlt">fluids</span> are flexible tools for processing materials. Supercritical <span class="hlt">fluids</span> have been applied to mass-transfer processes, phase-transition processes, reactive systems, materials-related processes, and nanostructured materials. Some applications are already at industrial capacity, whereas others remain under development. In addition to extraction, application areas include impregnation and cleaning, multistage countercurrent separation, particle formation, coating, and reactive systems such as hydrogenation, biomass gasification, and supercritical water oxidation. Polymers are modified with supercritical <span class="hlt">fluids</span>, and colloids and emulsions as well as nanostructured materials exhibit interesting phenomena when in contact with supercritical <span class="hlt">fluids</span> that can be industrially exploited. For these applications to succeed, the properties of supercritical <span class="hlt">fluids</span> in combination with the materials processed must be clearly determined and fundamental knowledge of the complex behavior must be made readily available.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/862465','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/862465"><span>Microwave <span class="hlt">fluid</span> flow meter</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Billeter, Thomas R.; Philipp, Lee D.; Schemmel, Richard R.</p> <p>1976-01-01</p> <p>A microwave <span class="hlt">fluid</span> flow meter is described utilizing two spaced microwave sensors positioned along a <span class="hlt">fluid</span> flow path. Each sensor includes a microwave cavity having a frequency of resonance dependent upon the static pressure of the <span class="hlt">fluid</span> at the sensor locations. The resonant response of each cavity with respect to a variation in pressure of the monitored <span class="hlt">fluid</span> is represented by a corresponding electrical output which can be calibrated into a direct pressure reading. The pressure drop between sensor locations is then correlated as a measure of <span class="hlt">fluid</span> velocity. In the preferred embodiment the individual sensor cavities are strategically positioned outside the path of <span class="hlt">fluid</span> flow and are designed to resonate in two distinct frequency modes yielding a measure of temperature as well as pressure. The temperature response can then be used in correcting for pressure responses of the microwave cavity encountered due to temperature fluctuations.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/6746529','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/biblio/6746529"><span>Fiber optic <span class="hlt">fluid</span> detector</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Angel, S.M.</p> <p>1987-02-27</p> <p>Particular gases or liquids are detected with a fiber optic element having a cladding or coating of a material which absorbs the <span class="hlt">fluid</span> or <span class="hlt">fluids</span> and which exhibits a change of an optical property, such as index of refraction, light transmissiveness or fluoresence emission, for example, in response to absorption of the <span class="hlt">fluid</span>. The <span class="hlt">fluid</span> is sensed by directing light into the fiber optic element and detecting changes in the light, such as exit angle changes for example, that result from the changed optical property of the coating material. The <span class="hlt">fluid</span> detector may be used for such purposes as sensing toxic or explosive gases in the atmosphere, measuring ground water contamination or monitoring <span class="hlt">fluid</span> flows in industrial processes, among other uses. 10 figs.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/866979','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/866979"><span>Fiber optic <span class="hlt">fluid</span> detector</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Angel, S. Michael</p> <p>1989-01-01</p> <p>Particular gases or liquids are detected with a fiber optic element (11, 11a to 11j) having a cladding or coating of a material (23, 23a to 23j) which absorbs the <span class="hlt">fluid</span> or <span class="hlt">fluids</span> and which exhibits a change of an optical property, such as index of refraction, light transmissiveness or fluoresence emission, for example, in response to absorption of the <span class="hlt">fluid</span>. The <span class="hlt">fluid</span> is sensed by directing light into the fiber optic element and detecting changes in the light, such as exit angle changes for example, that result from the changed optical property of the coating material. The <span class="hlt">fluid</span> detector (24, 24a to 24j) may be used for such purposes as sensing toxic or explosive gases in the atmosphere, measuring ground water contamination or monitoring <span class="hlt">fluid</span> flows in industrial processes, among other uses.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/6159287','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/6159287"><span>Disposal of drilling <span class="hlt">fluids</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Bryson, W.R.</p> <p>1983-06-01</p> <p>Prior to 1974 the disposal of drilling <span class="hlt">fluids</span> was not considered to be much of an environmental problem. In the past, disposal of drilling <span class="hlt">fluids</span> was accomplished in various ways such as spreading on oil field lease roads to stabilize the road surface and control dust, spreading in the base of depressions of sandy land areas to increase water retention, and leaving the <span class="hlt">fluid</span> in the reserve pit to be covered on closure of the pit. In recent years, some states have become concerned over the indescriminate dumping of drilling <span class="hlt">fluids</span> into pits or unauthorized locations and have developed specific regulations to alleviate the perceived deterioration of environmental and groundwater quality from uncontrolled disposal practices. The disposal of drilling <span class="hlt">fluids</span> in Kansas is discussed along with a newer method or treatment in drilling <span class="hlt">fluid</span> disposal.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2003EAEJA.....8191B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2003EAEJA.....8191B"><span>Properties of iron under <span class="hlt">core</span> conditions</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Brown, J. M.</p> <p>2003-04-01</p> <p>Underlying an understanding of the geodynamo and evolution of the <span class="hlt">core</span> is knowledge of the physical and chemical properties of iron and iron mixtures under high pressure and temperature conditions. Key properties include the viscosity of the <span class="hlt">fluid</span> outer <span class="hlt">core</span>, thermal diffusivity, equations-of-state, elastic properties of solid phases, and phase equilibria for iron and iron-dominated mixtures. As is expected for work that continues to tax technological and intellectual limits, controversy has followed both experimental and theoretical progress in this field. However, estimates for the melting temperature of the inner <span class="hlt">core</span> show convergence and the equation-of-state for iron as determined in independent experiments and theories are in remarkable accord. Furthermore, although the structure and elastic properties of the solid inner-<span class="hlt">core</span> phase remains uncertain, theoretical and experimental underpinnings are better understood and substantial progress is likely in the near future. This talk will focus on an identification of properties that are reasonably well known and those that merit further detailed study. In particular, both theoretical and experimental (static and shock wave) determinations of the density of iron under extreme conditions are in agreement at the 1% or better level. The behavior of the Gruneisen parameter (which determines the geothermal gradient and controls much of the outer <span class="hlt">core</span> heat flux) is constrained by experiment and theory under <span class="hlt">core</span> conditions for both solid and liquid phases. Recent experiments and theory are suggestive of structure or structures other than the high-pressure hexagonal close-packed (HCP) phase. Various theories and experiments for the elasticity of HCP iron remain in poor accord. Uncontroversial constraints on <span class="hlt">core</span> chemistry will likely never be possible. However, reasonable bounds are possible on the basis of seismic profiles, geochemical arguments, and determinations of sound velocities and densities at high pressure and</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/978363','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/978363"><span>CFD Analysis of <span class="hlt">Core</span> Bypass Phenomena</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Richard W. Johnson; Hiroyuki Sato; Richard R. Schultz</p> <p>2010-03-01</p> <p>The U.S. Department of Energy is exploring the potential for the VHTR which will be either of a prismatic or a pebble-bed type. One important design consideration for the reactor <span class="hlt">core</span> of a prismatic VHTR is coolant bypass flow which occurs in the interstitial regions between fuel blocks. Such gaps are an inherent presence in the reactor <span class="hlt">core</span> because of tolerances in manufacturing the blocks and the inexact nature of their installation. Furthermore, the geometry of the graphite blocks changes over the lifetime of the reactor because of thermal expansion and irradiation damage. The existence of the gaps induces a flow bias in the fuel blocks and results in unexpected increase of maximum fuel temperature. Traditionally, simplified methods such as flow network calculations employing experimental correlations are used to estimate flow and temperature distributions in the <span class="hlt">core</span> design. However, the distribution of temperature in the fuel pins and graphite blocks as well as coolant outlet temperatures are strongly coupled with the local heat generation rate within fuel blocks which is not uniformly distributed in the <span class="hlt">core</span>. Hence, it is crucial to establish mechanistic based methods which can be applied to the reactor <span class="hlt">core</span> thermal hydraulic design and safety analysis. Computational <span class="hlt">Fluid</span> Dynamics (CFD) codes, which have a capability of local physics based simulation, are widely used in various industrial fields. This study investigates <span class="hlt">core</span> bypass flow phenomena with the assistance of commercial CFD codes and establishes a baseline for evaluation methods. A one-twelfth sector of the hexagonal block surface is modeled and extruded down to whole <span class="hlt">core</span> length of 10.704m. The computational domain is divided vertically with an upper reflector, a fuel section and a lower reflector. Each side of the sector grid can be set as a symmetry boundary</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/974775','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/974775"><span>CFD Analysis of <span class="hlt">Core</span> Bypass Phenomena</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Richard W. Johnson; Hiroyuki Sato; Richard R. Schultz</p> <p>2009-11-01</p> <p>The U.S. Department of Energy is exploring the potential for the VHTR which will be either of a prismatic or a pebble-bed type. One important design consideration for the reactor <span class="hlt">core</span> of a prismatic VHTR is coolant bypass flow which occurs in the interstitial regions between fuel blocks. Such gaps are an inherent presence in the reactor <span class="hlt">core</span> because of tolerances in manufacturing the blocks and the inexact nature of their installation. Furthermore, the geometry of the graphite blocks changes over the lifetime of the reactor because of thermal expansion and irradiation damage. The existence of the gaps induces a flow bias in the fuel blocks and results in unexpected increase of maximum fuel temperature. Traditionally, simplified methods such as flow network calculations employing experimental correlations are used to estimate flow and temperature distributions in the <span class="hlt">core</span> design. However, the distribution of temperature in the fuel pins and graphite blocks as well as coolant outlet temperatures are strongly coupled with the local heat generation rate within fuel blocks which is not uniformly distributed in the <span class="hlt">core</span>. Hence, it is crucial to establish mechanistic based methods which can be applied to the reactor <span class="hlt">core</span> thermal hydraulic design and safety analysis. Computational <span class="hlt">Fluid</span> Dynamics (CFD) codes, which have a capability of local physics based simulation, are widely used in various industrial fields. This study investigates <span class="hlt">core</span> bypass flow phenomena with the assistance of commercial CFD codes and establishes a baseline for evaluation methods. A one-twelfth sector of the hexagonal block surface is modeled and extruded down to whole <span class="hlt">core</span> length of 10.704m. The computational domain is divided vertically with an upper reflector, a fuel section and a lower reflector. Each side of the one-twelfth grid can be set as a symmetry boundary</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19790013525','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19790013525"><span><span class="hlt">Core</span> formation, evolution, and convection: A geophysical model</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Ruff, L.; Anderson, D. L.</p> <p>1978-01-01</p> <p>A model is proposed for the formation and evolution of the Earth's <span class="hlt">core</span> which provides an adequate energy source for maintaining the geodynamo. A modified inhomogeneous accretion model is proposed which leads to initial iron and refractory enrichment at the center of the planet. The probable heat source for melting of the <span class="hlt">core</span> is the decay of Al. The refractory material is emplaced irregularly in the lowermost mantle with uranium and thorium serving as a long lived heat source. <span class="hlt">Fluid</span> motions in the <span class="hlt">core</span> are driven by the differential heating from above and the resulting cyclonic motions may be the source of the geodynamo.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19800042041&hterms=uranium+enrichment&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3Duranium%2Benrichment','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19800042041&hterms=uranium+enrichment&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3Duranium%2Benrichment"><span><span class="hlt">Core</span> formation, evolution, and convection - A geophysical model</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Ruff, L.; Anderson, D. L.</p> <p>1980-01-01</p> <p>A model for the formation and evolution of the earth's <span class="hlt">core</span>, which provides an adequate energy source for maintaining the geodynamo, is proposed. A modified inhomogeneous accretion model is proposed which leads to initial iron and refractory enrichment at the center of the planet. The probable heat source for melting of the <span class="hlt">core</span> is the decay of Al-26. The refractory material is emplaced irregularly in the lowermost mantle with uranium and thorium serving as a long-lived heat source. <span class="hlt">Fluid</span> motions in the <span class="hlt">core</span> are driven by the differential heating from above and the resulting cyclonic motions may be the source of the geodynamo.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19800042041&hterms=Geodynamo&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3DGeodynamo','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19800042041&hterms=Geodynamo&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3DGeodynamo"><span><span class="hlt">Core</span> formation, evolution, and convection - A geophysical model</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Ruff, L.; Anderson, D. L.</p> <p>1980-01-01</p> <p>A model for the formation and evolution of the earth's <span class="hlt">core</span>, which provides an adequate energy source for maintaining the geodynamo, is proposed. A modified inhomogeneous accretion model is proposed which leads to initial iron and refractory enrichment at the center of the planet. The probable heat source for melting of the <span class="hlt">core</span> is the decay of Al-26. The refractory material is emplaced irregularly in the lowermost mantle with uranium and thorium serving as a long-lived heat source. <span class="hlt">Fluid</span> motions in the <span class="hlt">core</span> are driven by the differential heating from above and the resulting cyclonic motions may be the source of the geodynamo.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19780013649','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19780013649"><span>Solar heat transport <span class="hlt">fluid</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p></p> <p>1978-01-01</p> <p>The progress made on the development and delivery of noncorrosive <span class="hlt">fluid</span> subsystems is reported. These subsystems are to be compatible with closed-loop solar heating or combined heating and hot water systems. They are also to be compatible with both metallic and non-metallic plumbing systems. At least 100 gallons of each type of <span class="hlt">fluid</span> recommended by the contractor will be delivered under the contract. The performance testing of a number of <span class="hlt">fluids</span> is described.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/18655997','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/18655997"><span>Persistent interface <span class="hlt">fluid</span> syndrome.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Hoffman, Richard S; Fine, I Howard; Packer, Mark</p> <p>2008-08-01</p> <p>We present an unusual case of persistent interface <span class="hlt">fluid</span> that would not resolve despite normal intraocular pressure and corneal endothelial replacement with Descemet-stripping endothelial keratoplasty. Dissection, elevation, and repositioning of the laser in situ keratomileusis flap were required to resolve the interface <span class="hlt">fluid</span>. Circumferential corneal graft-host margin scar formation acting as a mechanical strut may have been the cause of the intractable interface <span class="hlt">fluid</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/5476451','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/5476451"><span><span class="hlt">Fluid</span> pumping system</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Heath, R.T.; Gerlach, C.R.</p> <p>1986-05-13</p> <p>A <span class="hlt">fluid</span> pumping system is described for use with a natural gas dehydrating system or the like having an absorber apparatus for removing water from wet natural gas to produce dry natural gas by use of a dessicant agent such as glycol, and a glycol treater apparatus for producing a source of dry glycol from wet glycol received from the absorber apparatus. The system consists of: a <span class="hlt">fluid</span> pump means operatively connected between dry glycol source and absorber apparatus for pumping dry glycol from the dry glycol source to the absorber apparatus; a <span class="hlt">fluid</span> operable piston motor means operatively associated with the pump means for driving the pump means and having <span class="hlt">fluid</span> inlet passage means for receiving wet glycol from the absorber and <span class="hlt">fluid</span> outlet passage means for delivering wet glycol to the glycol reboiler means wherein energy derived from the flow of <span class="hlt">fluid</span> passing through the <span class="hlt">fluid</span> inlet passage means provides the entire motivating force for the motor means and the pump means; the <span class="hlt">fluid</span> pump means comprising a first pair of equal diameter chamber portion of a double acting piston means having a piston rod with two oppositely positioned piston heads at terminal ends thereof received within two oppositely positioned cylinders mounted on a fixed central body which slidably supports the piston rod; the <span class="hlt">fluid</span> operable motor means comprising a second pair of equal diameter chamber portions of the double acting piston means; the effective areas of outwardly directed faces of the piston heads being substantially greater than the effective areas of inwardly directed faces of the piston heads; and a wet glycol passage shifting means associated with the <span class="hlt">fluid</span> motor means for automatically changing the porting of the <span class="hlt">fluid</span> motor means at the end of a piston stroke for producing reciprocal piston motion in the <span class="hlt">fluid</span> motor means including toggle means actuated by the piston rod.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28164837','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28164837"><span>Perioperative <span class="hlt">Fluid</span> Therapy.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Fantoni, Denise; Shih, Andre C</p> <p>2017-03-01</p> <p>Anesthesia can lead to pathophysiologic changes that dramatically alter the <span class="hlt">fluid</span> balance of the body compartments and the intravascular space. <span class="hlt">Fluid</span> administration can be monitored and evaluated using static and dynamic indexes. Guidelines for <span class="hlt">fluid</span> rates during anesthesia begin with 3 mL/kg/h in cats and 5 mL/kg/h in dogs. If at all possible, patients should be stabilized and electrolyte disturbances should be corrected before general anesthesia.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1016136','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1016136"><span>Metalworking and machining <span class="hlt">fluids</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Erdemir, Ali; Sykora, Frank; Dorbeck, Mark</p> <p>2010-10-12</p> <p>Improved boron-based metal working and machining <span class="hlt">fluids</span>. Boric acid and boron-based additives that, when mixed with certain carrier <span class="hlt">fluids</span>, such as water, cellulose and/or cellulose derivatives, polyhydric alcohol, polyalkylene glycol, polyvinyl alcohol, starch, dextrin, in solid and/or solvated forms result in improved metalworking and machining of metallic work pieces. <span class="hlt">Fluids</span> manufactured with boric acid or boron-based additives effectively reduce friction, prevent galling and severe wear problems on cutting and forming tools.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li class="active"><span>17</span></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_17 --> <div id="page_18" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li class="active"><span>18</span></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="341"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19990041848','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19990041848"><span>Gas <span class="hlt">Core</span> Nuclear Rocket Feasibility Project</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Howe, S. D.; DeVolder, B.; Thode, L.; Zerkle, D.</p> <p>1997-01-01</p> <p>The next giant leap for mankind will be the human exploration of Mars. Almost certainly within the next thirty years, a human crew will brave the isolation, the radiation, and the lack of gravity to walk on and explore the Red planet. However, because the mission distances and duration will be hundreds of times greater than the lunar missions, a human crew will face much greater obstacles and a higher risk than those experienced during the Apollo program. A single solution to many of these obstacles is to dramatically decrease the mission duration by developing a high performance propulsion system. The gas <span class="hlt">core</span> nuclear rocket (GCNR) has the potential to be such a system. The gas <span class="hlt">core</span> concept relies on the use of <span class="hlt">fluid</span> dynamic forces to create and maintain a vortex. The vortex is composed of a fissile material which will achieve criticality and produce high power levels. By radiatively coupling to the surrounding <span class="hlt">fluids</span>, extremely high temperatures in the propellant and, thus, high specific impulses can be generated. The ship velocities enabled by such performance may allow a 9 month round trip, manned Mars mission to be considered. Alternatively, one might consider slightly longer missions in ships that are heavily shielded against the intense Galactic Cosmic Ray flux to further reduce the radiation dose to the crew. The current status of the research program at the Los Alamos National Laboratory into the gas <span class="hlt">core</span> nuclear rocket feasibility will be discussed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012PhRvD..86f3002H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012PhRvD..86f3002H"><span>Dynamics of dissipative multifluid neutron star <span class="hlt">cores</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Haskell, B.; Andersson, N.; Comer, G. L.</p> <p>2012-09-01</p> <p>We present a Newtonian multifluid formalism for superfluid neutron star <span class="hlt">cores</span>, focusing on the additional dissipative terms which arise when one takes into account the individual dynamical degrees of freedom associated with the coupled “<span class="hlt">fluids</span>.” The problem is of direct astrophysical interest as the nature of the dissipative terms can have significant impact on the damping of the various oscillation modes of the star and the associated gravitational-wave signatures. A particularly interesting application concerns the gravitational-wave driven instability of f- and r-modes. We apply the developed formalism to two specific three-<span class="hlt">fluid</span> systems: (i) a hyperon <span class="hlt">core</span> in which both Λ and Σ- hyperons are present and (ii) a <span class="hlt">core</span> of deconfined quarks in the color-flavor-locked phase in which a population of neutral K0 kaons is present. The formalism is, however, general and can be applied to other problems in neutron-star dynamics (such as the effect of thermal excitations close to the superfluid transition temperature) as well as laboratory multifluid systems.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/658122','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/658122"><span>Gas <span class="hlt">core</span> nuclear rocket feasibility project</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Howe, S.D.; DeVolder, B.; Thode, L.; Zerkle, D.</p> <p>1997-09-01</p> <p>The next giant leap for mankind will be the human exploration of Mars. Almost certainly within the next thirty years, a human crew will brave the isolation, the radiation, and the lack of gravity to walk on and explore the Red planet. However, because the mission distances and duration will be hundreds of times greater than the lunar missions, a human crew will face much greater obstacles and a higher risk than those experienced during the Apollo program. A single solution to many of these obstacles is to dramatically decrease the mission duration by developing a high performance propulsion system. The gas <span class="hlt">core</span> nuclear rocket (GCNR) has the potential to be such a system. The gas <span class="hlt">core</span> concept relies on the use of <span class="hlt">fluid</span> dynamic forces to create and maintain a vortex. The vortex is composed of a fissile material which will achieve criticality and produce high power levels. By radiatively coupling to the surrounding <span class="hlt">fluids</span>, extremely high temperatures in the propellant and, thus, high specific impulses can be generated. The ship velocities enabled by such performance may allow a 9 month round trip, manned Mars mission to be considered. Alternatively, one might consider slightly longer missions in ships that are heavily shielded against the intense Galactic Cosmic Ray flux to further reduce the radiation dose to the crew. The current status of the research program at the Los Alamos National Laboratory into the gas <span class="hlt">core</span> nuclear rocket feasibility will be discussed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=20010117738&hterms=core+strength&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D50%26Ntt%3Dcore%2Bstrength','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=20010117738&hterms=core+strength&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D50%26Ntt%3Dcore%2Bstrength"><span>Multiple <span class="hlt">Core</span> Galaxies</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Miller, R.H.; Morrison, David (Technical Monitor)</p> <p>1994-01-01</p> <p>Nuclei of galaxies often show complicated density structures and perplexing kinematic signatures. In the past we have reported numerical experiments indicating a natural tendency for galaxies to show nuclei offset with respect to nearby isophotes and for the nucleus to have a radial velocity different from the galaxy's systemic velocity. Other experiments show normal mode oscillations in galaxies with large amplitudes. These oscillations do not damp appreciably over a Hubble time. The common thread running through all these is that galaxies often show evidence of ringing, bouncing, or sloshing around in unexpected ways, even though they have not been disturbed by any external event. Recent observational evidence shows yet another phenomenon indicating the dynamical complexity of central regions of galaxies: multiple <span class="hlt">cores</span> (M31, Markarian 315 and 463 for example). These systems can hardly be static. We noted long-lived multiple <span class="hlt">core</span> systems in galaxies in numerical experiments some years ago, and we have more recently followed up with a series of experiments on multiple <span class="hlt">core</span> galaxies, starting with two <span class="hlt">cores</span>. The relevant parameters are the energy in the orbiting clumps, their relative.masses, the (local) strength of the potential well representing the parent galaxy, and the number of <span class="hlt">cores</span>. We have studied the dependence of the merger rates and the nature of the final merger product on these parameters. Individual <span class="hlt">cores</span> survive much longer in stronger background potentials. <span class="hlt">Cores</span> can survive for a substantial fraction of a Hubble time if they travel on reasonable orbits.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=20010117738&hterms=isophotes&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D10%26Ntt%3Disophotes','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=20010117738&hterms=isophotes&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D10%26Ntt%3Disophotes"><span>Multiple <span class="hlt">Core</span> Galaxies</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Miller, R.H.; Morrison, David (Technical Monitor)</p> <p>1994-01-01</p> <p>Nuclei of galaxies often show complicated density structures and perplexing kinematic signatures. In the past we have reported numerical experiments indicating a natural tendency for galaxies to show nuclei offset with respect to nearby isophotes and for the nucleus to have a radial velocity different from the galaxy's systemic velocity. Other experiments show normal mode oscillations in galaxies with large amplitudes. These oscillations do not damp appreciably over a Hubble time. The common thread running through all these is that galaxies often show evidence of ringing, bouncing, or sloshing around in unexpected ways, even though they have not been disturbed by any external event. Recent observational evidence shows yet another phenomenon indicating the dynamical complexity of central regions of galaxies: multiple <span class="hlt">cores</span> (M31, Markarian 315 and 463 for example). These systems can hardly be static. We noted long-lived multiple <span class="hlt">core</span> systems in galaxies in numerical experiments some years ago, and we have more recently followed up with a series of experiments on multiple <span class="hlt">core</span> galaxies, starting with two <span class="hlt">cores</span>. The relevant parameters are the energy in the orbiting clumps, their relative.masses, the (local) strength of the potential well representing the parent galaxy, and the number of <span class="hlt">cores</span>. We have studied the dependence of the merger rates and the nature of the final merger product on these parameters. Individual <span class="hlt">cores</span> survive much longer in stronger background potentials. <span class="hlt">Cores</span> can survive for a substantial fraction of a Hubble time if they travel on reasonable orbits.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19940015888','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19940015888"><span>Spiral <span class="hlt">fluid</span> separator</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Robertson, Glen A. (Inventor)</p> <p>1993-01-01</p> <p>A <span class="hlt">fluid</span> separator for separating particulate matter such as contaminates is provided which includes a series of spiral tubes of progressively decreasing cross sectional area connected in series. Each tube has an outlet on the outer curvature of the spiral. As <span class="hlt">fluid</span> spirals down a tube, centrifugal force acts to force the heavier particulate matter to the outer wall of the tube, where it exits through the outlet. The remaining, and now cleaner, <span class="hlt">fluid</span> reaches the next tube, which is smaller in cross sectional area, where the process is repeated. The <span class="hlt">fluid</span> which comes out the final tube is diminished of particulate matter.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016APS..DFD.D9004N','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016APS..DFD.D9004N"><span>The <span class="hlt">Fluids</span> RAP</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Nedyalkov, Ivaylo</p> <p>2016-11-01</p> <p>After fifteen years of experience in rap, and ten in <span class="hlt">fluid</span> mechanics, "I am coming here with high-Reynolds-number stamina; I can beat these rap folks whose flows are... laminar." The rap relates <span class="hlt">fluid</span> flows to rap flows. The <span class="hlt">fluid</span> concepts presented in the song have varying complexity and the listeners/viewers will be encouraged to read the explanations on a site dedicated to the rap. The music video will provide an opportunity to share high-quality <span class="hlt">fluid</span> visualizations with a general audience. This talk will present the rap lyrics, the vision for the video, and the strategy for outreach. Suggestions and comments will be welcomed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1183453','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1183453"><span>Electrorheological <span class="hlt">fluids</span> and methods</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Green, Peter F.; McIntyre, Ernest C.</p> <p>2015-06-02</p> <p>Electrorheological <span class="hlt">fluids</span> and methods include changes in liquid-like materials that can flow like milk and subsequently form solid-like structures under applied electric fields; e.g., about 1 kV/mm. Such <span class="hlt">fluids</span> can be used in various ways as smart suspensions, including uses in automotive, defense, and civil engineering applications. Electrorheological <span class="hlt">fluids</span> and methods include one or more polar molecule substituted polyhedral silsesquioxanes (e.g., sulfonated polyhedral silsesquioxanes) and one or more oils (e.g., silicone oil), where the <span class="hlt">fluid</span> can be subjected to an electric field.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24469309','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24469309"><span>Electrodeposition from supercritical <span class="hlt">fluids</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Bartlett, P N; Cook, D A; George, M W; Hector, A L; Ke, J; Levason, W; Reid, G; Smith, D C; Zhang, W</p> <p>2014-05-28</p> <p>Recent studies have shown that it is possible to electrodeposit a range of materials, such as Cu, Ag and Ge, from various supercritical <span class="hlt">fluids</span>, including hydrofluorocarbons and mixtures of CO2 with suitable co-solvents. In this perspective we discuss the relatively new field of electrodeposition from supercritical <span class="hlt">fluids</span>. The perspective focuses on some of the underlying physical chemistry and covers both practical and scientific aspects of electrodeposition from supercritical <span class="hlt">fluids</span>. We also discuss possible applications for supercritical <span class="hlt">fluid</span> electrodeposition and suggest some key developments that are required to take the field to the next stage.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014SMaS...23b5012S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014SMaS...23b5012S"><span>Thermogelling magnetorheological <span class="hlt">fluids</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Shahrivar, Keshvad; de Vicente, Juan</p> <p>2014-02-01</p> <p>A novel approach is proposed for the formulation of kinetically stable magnetorheological (MR) <span class="hlt">fluids</span> exhibiting an MR effect. Thermoresponsive carrier <span class="hlt">fluids</span> are used which develop a sol-gel transition on increasing the temperature. Turbidity measurements, multiwave rheology and steady shear flow tests are carried out on model conventional MR <span class="hlt">fluids</span> prepared by dispersion of carbonyl iron microparticles in triblock copolymer solutions of type PEOx-PPOy-PEOx with x = 100 and y = 65. Experiments demonstrate that the MR <span class="hlt">fluids</span> remain stable against sedimentation in the gel phase and exhibit a very large (relative) MR effect (up to 1000%) in the sol phase.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19990078567&hterms=core+value&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3Dcore%2Bvalue','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19990078567&hterms=core+value&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3Dcore%2Bvalue"><span>Global <span class="hlt">Core</span> Plasma Model</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Gallagher, Dennis L.; Craven, P. D.; Comfort, R. H.</p> <p>1999-01-01</p> <p>Abstract. The Global <span class="hlt">Core</span> Plasma Model (GCPM) provides, empirically derived, <span class="hlt">core</span> plasma density as a function of geomagnetic and solar conditions throughout the inner magnetosphere. It is continuous in value and gradient and is composed of separate models for the ionosphere, the plasmasphere, the plasmapause, the trough, and the polar cap. The relative composition of plasmaspheric H+, He+, and O+ is included in the GCPM. A blunt plasmaspheric bulge and rotation of the bulge with changing geomagnetic conditions is included. The GCPM is an amalgam of density models, intended to serve as a framework for continued improvement as new measurements become available and are used to characterize <span class="hlt">core</span> plasma density, composition, and temperature.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19990078567&hterms=amalgam&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D10%26Ntt%3Damalgam','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19990078567&hterms=amalgam&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D10%26Ntt%3Damalgam"><span>Global <span class="hlt">Core</span> Plasma Model</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Gallagher, Dennis L.; Craven, P. D.; Comfort, R. H.</p> <p>1999-01-01</p> <p>Abstract. The Global <span class="hlt">Core</span> Plasma Model (GCPM) provides, empirically derived, <span class="hlt">core</span> plasma density as a function of geomagnetic and solar conditions throughout the inner magnetosphere. It is continuous in value and gradient and is composed of separate models for the ionosphere, the plasmasphere, the plasmapause, the trough, and the polar cap. The relative composition of plasmaspheric H+, He+, and O+ is included in the GCPM. A blunt plasmaspheric bulge and rotation of the bulge with changing geomagnetic conditions is included. The GCPM is an amalgam of density models, intended to serve as a framework for continued improvement as new measurements become available and are used to characterize <span class="hlt">core</span> plasma density, composition, and temperature.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1093235','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1093235"><span><span class="hlt">Core</span> shroud corner joints</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Gilmore, Charles B.; Forsyth, David R.</p> <p>2013-09-10</p> <p>A <span class="hlt">core</span> shroud is provided, which includes a number of planar members, a number of unitary corners, and a number of subassemblies each comprising a combination of the planar members and the unitary corners. Each unitary corner comprises a unitary extrusion including a first planar portion and a second planar portion disposed perpendicularly with respect to the first planar portion. At least one of the subassemblies comprises a plurality of the unitary corners disposed side-by-side in an alternating opposing relationship. A plurality of the subassemblies can be combined to form a quarter perimeter segment of the <span class="hlt">core</span> shroud. Four quarter perimeter segments join together to form the <span class="hlt">core</span> shroud.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/6229697','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/6229697"><span>A laboratory evaluation of <span class="hlt">core</span>-preservation materials</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Auman, J.B.</p> <p>1989-03-01</p> <p>This paper documents the results of a laboratory study of the effectiveness of available state-of-the-art <span class="hlt">core</span>-preservation materials. The ability of the <span class="hlt">core</span>-sealing material to prevent postpreservation changes in <span class="hlt">fluid</span> saturations may have a profound effect on subsequent laboratory measurements. Considering the expense involved in obtaining, storing, and analyzing a native-state (oil-cut) <span class="hlt">core</span> and the purpose for which it was cut, knowledge of exactly what materials can adequately preserve a <span class="hlt">core</span> until laboratory measurements are made is critical and should not be overlooked. In this laboratory study, saturated Berea sandstone <span class="hlt">core</span> plugs were preserved in a number of commonly used sealing materials. The sealed plugs were then stored in a humidity-controlled environment and periodically weighed to ascertain the degree of change that had occurred in the saturation of the plug. In addition, this paper discusses and suggests procedures for applying the recommended sealing material.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2004PhDT.......189F','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2004PhDT.......189F"><span>Incompressible <span class="hlt">fluid</span> flows in rapidly rotating cavities</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Fournier, Alexandre</p> <p></p> <p>The subject of incompressible <span class="hlt">fluid</span> flows in rapidly rotating cavities, relevant to the dynamics of the Earth's outer <span class="hlt">core</span>, is addressed here by means of numerical modeling. We recall in the introduction what makes this topic fascinating and challenging, and emphasize the need for new, more flexible numerical approaches in line with the evolution of today's parallel computers. Relying upon recent advances in numerical analysis, we first introduce in chapter 2 a spectral element model of the axisymmetric Navier-Stokes equation, in a rotating reference frame. Comparisons with analytical or published numerical solutions are made for various test problems, which highlight the spectral convergence properties and adaptivity of the approach. In chapter 3, we couple this axisymmetric kernel with a Fourier expansion in longitude in order to describe the dynamics of three-dimensional convection flows. Again, several reference problems are studied. In the specific case of a rotating <span class="hlt">fluid</span> undergoing thermal convection, this so-called Fourier-spectral element method (FSEM) proves to be as accurate as standard pseudo-spectral techniques. Having this numerical tool anchored on solid grounds, we study in chapter 4 <span class="hlt">fluid</span> flows driven by thermal convection and precession at the same time. A new topic in the vast field of <span class="hlt">fluid</span> mechanics, convecto-precessing flows are of particular importance for the Earth's <span class="hlt">core</span>, and the equations governing their evolution are derived in detail. We solve these using the FSEM; results seem to indicate that to first order, thermal convection and precession ignore each other. We discuss the relevance of these calculations for the Earth's <span class="hlt">core</span> and outline directions for future related research.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19990027454','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19990027454"><span>Automated <span class="hlt">Fluid</span> Feature Extraction from Transient Simulations</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Haimes, Robert; Lovely, David</p> <p>1999-01-01</p> <p>In the past, feature extraction and identification were interesting concepts, but not required to understand the underlying physics of a steady flow field. This is because the results of the more traditional tools like iso-surfaces, cuts and streamlines were more interactive and easily abstracted so they could be represented to the investigator. These tools worked and properly conveyed the collected information at the expense of much interaction. For unsteady flow-fields, the investigator does not have the luxury of spending time scanning only one "snap-shot" of the simulation. Automated assistance is required in pointing out areas of potential interest contained within the flow. This must not require a heavy compute burden (the visualization should not significantly slow down the solution procedure for co-processing environments like pV3). And methods must be developed to abstract the feature and display it in a manner that physically makes sense. The following is a list of the important physical phenomena found in transient (and steady-state) <span class="hlt">fluid</span> flow: (1) Shocks, (2) Vortex <span class="hlt">cores</span>, (3) Regions of recirculation, (4) Boundary layers, (5) Wakes. Three papers and an initial specification for the (The <span class="hlt">Fluid</span> eXtraction tool kit) FX Programmer's guide were included. The papers, submitted to the AIAA Computational <span class="hlt">Fluid</span> Dynamics Conference, are entitled : (1) Using Residence Time for the Extraction of Recirculation Regions, (2) Shock Detection from Computational <span class="hlt">Fluid</span> Dynamics results and (3) On the Velocity Gradient Tensor and <span class="hlt">Fluid</span> Feature Extraction.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015EGUGA..17.2468H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015EGUGA..17.2468H"><span>Constraint on the 1D earth model near <span class="hlt">core</span>-mantle boundary by free <span class="hlt">core</span> nutation</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Huang, Chengli; Zhang, Mian</p> <p>2015-04-01</p> <p>Free <span class="hlt">core</span> nutation (FCN) is a normal mode of the rotating earth with <span class="hlt">fluid</span> outer <span class="hlt">core</span> (FOC). Its period depends on the physics of the mantle and FOC, especially the parameters near <span class="hlt">core</span>-mantle boundary (CMB), like the density and elastic (Lame) parameters. FCN period can be determined very accurately by VLBI and superconductive tidal gravimetry, but the theoretical calculation results of FCN period from traditional approaches and 1D earth model (like PREM) deviate significantly from the accurate observation. Meanwhile, the influence of the uncertainty of a given earth model on nutation has never been studied before. In this work, a numerical experiment is presented to check this problem, and we want to see whether FCN can provide a constraint on the construction of a 1D earth model, especially on the gradient of material density near CMB.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015IAUGA..2256165H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015IAUGA..2256165H"><span>Constraint on the earth density near <span class="hlt">core</span>-mantle boundary by free <span class="hlt">core</span> nutation</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Huang, Cheng-Li; Zhang, Mian</p> <p>2015-08-01</p> <p>Free <span class="hlt">core</span> nutation (FCN) is a normal mode of the rotating earth with <span class="hlt">fluid</span> outer <span class="hlt">core</span> (FOC). Its period depends on the physics of the mantle and FOC, especially the parameters near <span class="hlt">core</span>-mantle boundary (CMB), like the density and elastic (Lame) parameters. FCN period can be determined very accurately by VLBI and superconductive tidal gravimetry, but the theoretical calculation results of FCN period from traditional approaches and 1D earth model (like PREM) deviate significantly from the accurate observation. Meanwhile, the influence of the uncertainty of a given earth model on nutation has never been studied before. In this work, a numerical experiment is presented to check this problem, and we want to see whether FCN can provide a constraint on the construction of a 1D earth model, especially on the gradient of material density near CMB.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19930018610','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19930018610"><span>Space Station <span class="hlt">fluid</span> management logistics</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Dominick, Sam M.</p> <p>1990-01-01</p> <p>Viewgraphs and discussion on space station <span class="hlt">fluid</span> management logistics are presented. Topics covered include: <span class="hlt">fluid</span> management logistics - issues for Space Station Freedom evolution; current <span class="hlt">fluid</span> logistics approach; evolution of Space Station Freedom <span class="hlt">fluid</span> resupply; launch vehicle evolution; ELV logistics system approach; logistics carrier configuration; expendable <span class="hlt">fluid</span>/propellant carrier description; <span class="hlt">fluid</span> carrier design concept; logistics carrier orbital operations; carrier operations at space station; summary/status of orbital <span class="hlt">fluid</span> transfer techniques; Soviet progress tanker system; and Soviet propellant resupply system observations.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19850034834&hterms=Core+Collapse+Supernovae&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3DCore%2BCollapse%2BSupernovae','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19850034834&hterms=Core+Collapse+Supernovae&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3DCore%2BCollapse%2BSupernovae"><span>Magnetorotational iron <span class="hlt">core</span> collapse</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Symbalisty, E. M. D.</p> <p>1984-01-01</p> <p>During its final evolutionary stages, a massive star, as considered in current astrophysical theory, undergoes rapid collapse, thereby triggering a sequence of a catastrophic event which results in a Type II supernova explosion. A remnant neutron star or a black hole is left after the explosion. Stellar collapse occurs, when thermonuclear fusion has consumed the lighter elements present. At this stage, the <span class="hlt">core</span> consists of iron. Difficulties arise regarding an appropriate model with respect to the <span class="hlt">core</span> collapse. The present investigation is concerned with the evolution of a Type II supernova <span class="hlt">core</span> including the effects of rotation and magnetic fields. A simple neutrino model is developed which reproduced the spherically symmetric results of Bowers and Wilson (1982). Several two-dimensional computational models of stellar collapse are studied, taking into account a case in which a 15 solar masses iron <span class="hlt">core</span> was artificially given rotational and magnetic energy.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li class="active"><span>18</span></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_18 --> <div id="page_19" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li class="active"><span>19</span></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="361"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://cancergenome.nih.gov/abouttcga/overview/howitworks/bcr','NCI'); return false;" href="https://cancergenome.nih.gov/abouttcga/overview/howitworks/bcr"><span>Biospecimen <span class="hlt">Core</span> Resource - TCGA</span></a></p> <p><a target="_blank" href="http://www.cancer.gov">Cancer.gov</a></p> <p></p> <p></p> <p>The Cancer Genome Atlas (TCGA) Biospecimen <span class="hlt">Core</span> Resource centralized laboratory reviews and processes blood and tissue samples and their associated data using optimized standard operating procedures for the entire TCGA Research Network.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=226233&keyword=Berlin&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50&CFID=76151292&CFTOKEN=94838324','EPA-EIMS'); return false;" href="http://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=226233&keyword=Berlin&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50&CFID=76151292&CFTOKEN=94838324"><span>Contaminated Sediment <span class="hlt">Core</span> Profiling</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>Evaluating the environmental risk of sites containing contaminated sediments often poses major challenges due in part to the absence of detailed information available for a given location. Sediment <span class="hlt">core</span> profiling is often utilized during preliminary environmental investigations ...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19970025852&hterms=schoenfelder&qs=N%3D0%26Ntk%3DAuthor-Name%26Ntx%3Dmode%2Bmatchall%26Ntt%3Dschoenfelder','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19970025852&hterms=schoenfelder&qs=N%3D0%26Ntk%3DAuthor-Name%26Ntx%3Dmode%2Bmatchall%26Ntt%3Dschoenfelder"><span>INTEGRAL <span class="hlt">core</span> programme</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Gehrels, N.; Schoenfelder, V.; Ubertini, P.; Winkler, C.</p> <p>1997-01-01</p> <p>The International Gamma Ray Astrophysics Laboratory (INTEGRAL) mission is described with emphasis on the INTEGRAL <span class="hlt">core</span> program. The progress made in the planning activities for the <span class="hlt">core</span> program is reported on. The INTEGRAL mission has a nominal lifetime of two years with a five year extension option. The observing time will be divided between the <span class="hlt">core</span> program (between 30 and 35 percent during the first two years) and general observations. The <span class="hlt">core</span> program consists of three main elements: the deep survey of the Galactic plane in the central radian of the Galaxy; frequent scans of the Galactic plane in the search for transient sources, and pointed observations of several selected sources. The allocation of the observation time is detailed and the sensitivities of the observations are outlined.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/866567','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/866567"><span><span class="hlt">Core</span> assembly storage structure</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Jones, Jr., Charles E.; Brunings, Jay E.</p> <p>1988-01-01</p> <p>A structure for the storage of <span class="hlt">core</span> assemblies from a liquid metal-cooled nuclear reactor. The structure comprises an enclosed housing having a substantially flat horizontal top plate, a bottom plate and substantially vertical wall members extending therebetween. A plurality of thimble members extend downwardly through the top plate. Each thimble member is closed at its bottom end and has an open end adjacent said top plate. Each thimble member has a length and diameter greater than that of the <span class="hlt">core</span> assembly to be stored therein. The housing is provided with an inlet duct for the admission of cooling air and an exhaust duct for the discharge of air therefrom, such that when hot <span class="hlt">core</span> assemblies are placed in the thimbles, the heat generated will by convection cause air to flow from the inlet duct around the thimbles and out the exhaust duct maintaining the <span class="hlt">core</span> assemblies at a safe temperature without the necessity of auxiliary powered cooling equipment.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=226233&keyword=risk+AND+profiling&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50','EPA-EIMS'); return false;" href="http://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=226233&keyword=risk+AND+profiling&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50"><span>Contaminated Sediment <span class="hlt">Core</span> Profiling</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>Evaluating the environmental risk of sites containing contaminated sediments often poses major challenges due in part to the absence of detailed information available for a given location. Sediment <span class="hlt">core</span> profiling is often utilized during preliminary environmental investigations ...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1984EOSTr..65Q.426B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1984EOSTr..65Q.426B"><span>Warm <span class="hlt">core</span> rings</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Bell, Peter M.</p> <p></p> <p>Gulf stream phenomena have been the focus of numerous studies by U.S. and Canadian oceanographic laboratories. Two years ago, observations of warm <span class="hlt">core</span> rings associated with the Gulf Stream were reported in The Oceanography Report, (November 2, 1982, p. 834). It was noted then that the structure of warm <span class="hlt">core</span> rings can undergo rapid transformation. Recently, a multidisciplinary group of physical and biological oceanographic institutions has examined the evolution of warm <span class="hlt">core</span> rings in detail [Nature, 308, pp. 837-840, 1984]. The study has involved research vessels Endeavor, Atlantis II, and Albatross IV for surface measurements of temperature, salinity, and for measurement surface pigments to assess the concentration of marine plants. The results are that even though warm <span class="hlt">core</span> rings are often very stable, undergoing only slow changes, it turns out that major alterations in structure can and do occur in short periods of 2-5 days.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20150010125','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20150010125"><span><span class="hlt">Core</span>-Noise Research</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Hultgren, Lennart S.</p> <p>2012-01-01</p> <p>This presentation is a technical summary of and outlook for NASA-internal and NASA-sponsored external research on <span class="hlt">core</span> noise funded by the Fundamental Aeronautics Program Subsonic Fixed Wing (SFW) Project. Sections of the presentation cover: the SFW system-level noise metrics for the 2015 (N+1), 2020 (N+2), and 2025 (N+3) timeframes; SFW strategic thrusts and technical challenges; SFW advanced subsystems that are broadly applicable to N+3 vehicle concepts, with an indication where further noise research is needed; the components of <span class="hlt">core</span> noise (compressor, combustor and turbine noise) and a rationale for NASA's current emphasis on the combustor-noise component; the increase in the relative importance of <span class="hlt">core</span> noise due to turbofan design trends; the need to understand and mitigate <span class="hlt">core</span>-noise sources for high-efficiency small gas generators; and the current research activities in the <span class="hlt">core</span>-noise area, with additional details given about forthcoming updates to NASA's Aircraft Noise Prediction Program (ANOPP) <span class="hlt">core</span>-noise prediction capabilities, two NRA efforts (Honeywell International, Phoenix, AZ and University of Illinois at Urbana-Champaign, respectively) to improve the understanding of <span class="hlt">core</span>-noise sources and noise propagation through the engine <span class="hlt">core</span>, and an effort to develop oxide/oxide ceramic-matrix-composite (CMC) liners for broadband noise attenuation suitable for turbofan-<span class="hlt">core</span> application. <span class="hlt">Core</span> noise must be addressed to ensure that the N+3 noise goals are met. Focused, but long-term, <span class="hlt">core</span>-noise research is carried out to enable the advanced high-efficiency small gas-generator subsystem, common to several N+3 conceptual designs, needed to meet NASA's technical challenges. Intermediate updates to prediction tools are implemented as the understanding of the source structure and engine-internal propagation effects is improved. The NASA Fundamental Aeronautics Program has the principal objective of overcoming today's national challenges in air transportation. The</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/20337483','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/20337483"><span>Nanowire-in-microtube structured <span class="hlt">core</span>/shell fibers via multifluidic coaxial electrospinning.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Chen, Hongyan; Wang, Nü; Di, Jiancheng; Zhao, Yong; Song, Yanlin; Jiang, Lei</p> <p>2010-07-06</p> <p>A multifluidic coaxial electrospinning approach is reported here to fabricate <span class="hlt">core</span>/shell ultrathin fibers with a novel nanowire-in-microtube structure from more optional <span class="hlt">fluid</span> pairs than routine coaxial electrospinning. The advantage of this approach lies in the fact that it introduces an extra middle <span class="hlt">fluid</span> between the <span class="hlt">core</span> and shell <span class="hlt">fluids</span> of traditional coaxial electrospinning, which can work as an effective spacer to decrease the interaction of the other two <span class="hlt">fluids</span>. Under the protection of a proper middle <span class="hlt">fluid</span>, more <span class="hlt">fluid</span> pairs, even mutually miscible <span class="hlt">fluids</span>, can be operated to generate "sandwich"-structured ultrathin fibers with a sharp boundary between the <span class="hlt">core</span> and shell materials. It thereby largely extends the scope of optional materials. Selectively removing the middle layer of the as-prepared fibers results in an interesting nanowire-in-microtube structure. Either homogeneous or heterogeneous fibers with well-tailored sandwich structures have been successfully fabricated. This method is an important extension of traditional co-electrospinning that affords a more universal avenue to preparing <span class="hlt">core</span>/shell fibers; moreover, the special hollow cavity structure may introduce some extra properties into the conventional <span class="hlt">core</span>/shell structure, which may find potential applications such as optical applications, microelectronics, and others.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/863271','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/863271"><span>Nuclear <span class="hlt">core</span> positioning system</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Garkisch, Hans D.; Yant, Howard W.; Patterson, John F.</p> <p>1979-01-01</p> <p>A structural support system for the <span class="hlt">core</span> of a nuclear reactor which achieves relatively restricted clearances at operating conditions and yet allows sufficient clearance between fuel assemblies at refueling temperatures. Axially displaced spacer pads having variable between pad spacing and a temperature compensated radial restraint system are utilized to maintain clearances between the fuel elements. The <span class="hlt">core</span> support plates are constructed of metals specially chosen such that differential thermal expansion produces positive restraint at operating temperatures.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/6086575','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/6086575"><span><span class="hlt">Core</span> bounce supernovae</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Cooperstein, J.</p> <p>1987-01-01</p> <p>The gravitational collapse mechanism for Type II supernovae is considered, concentrating on the direct implosion - <span class="hlt">core</span> bounce - hydrodynamic explosion picture. We examine the influence of the stiffness of the dense matter equation of state and discuss how the shock wave is formed. Its chances of success are determined by the equation of state, general relativistic effects, neutrino transport, and the size of presupernova iron <span class="hlt">core</span>. 12 refs., 1 tab.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://images.nasa.gov/#/details-MSFC-1500094.html','SCIGOVIMAGE-NASA'); return false;" href="https://images.nasa.gov/#/details-MSFC-1500094.html"><span>SLS <span class="hlt">Core</span> Stage Simulator</span></a></p> <p><a target="_blank" href="https://images.nasa.gov/">NASA Image and Video Library</a></p> <p></p> <p>2015-02-02</p> <p>CHRISTOPHER CRUMBLY, MANAGER OF THE SPACECRAFT PAYLOAD INTEGRATION AND EVOLUTION OFFICE, GAVE VISITORS AN INSIDER'S PERSPECTIVE ON THE <span class="hlt">CORE</span> STAGE SIMULATOR AT MARSHALL AND ITS IMPORTANCE TO DEVELOPMENT OF THE SPACE LAUNCH SYSTEM. CHRISTOPHER CRUMBLY, MANAGER OF THE SPACECRAFT PAYLOAD INTEGRATION AND EVOLUTION OFFICE, GAVE VISITORS AN INSIDER'S PERSPECTIVE ON THE <span class="hlt">CORE</span> STAGE SIMULATOR AT MARSHALL AND ITS IMPORTANCE TO DEVELOPMENT OF THE SPACE LAUNCH SYSTEM.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19900017005','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19900017005"><span>Micro <span class="hlt">coring</span> apparatus</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Collins, David; Brooks, Marshall; Chen, Paul; Dwelle, Paul; Fischer, Ben</p> <p>1989-01-01</p> <p>A micro-<span class="hlt">coring</span> apparatus for lunar exploration applications, that is compatible with the other components of the Walking Mobile Platform, was designed. The primary purpose of <span class="hlt">core</span> sampling is to gain an understanding of the geological composition and properties of the prescribed environment. This procedure has been used extensively for Earth studies and in limited applications during lunar explorations. The corer is described and analyzed for effectiveness.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19980201335','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19980201335"><span><span class="hlt">Fluids</span> and Combustion Facility: <span class="hlt">Fluids</span> Integrated Rack</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Corban, Robert R.; Winsa, Edward A.</p> <p>1998-01-01</p> <p>The <span class="hlt">Fluids</span> Integrated Rack (FIR) is a modular, multi-user facility to accommodate a wide variety of microgravity <span class="hlt">fluid</span> physics science experiments on-board the US Laboratory Module of the International Space Station (ISS). The FIR is one of three racks comprising the <span class="hlt">Fluids</span> and Combustion Facility (FCF). The FCF is being designed to increase the amount and quality of scientific data and decrease the development cost of an individual experiment relative to the era of Space Shuttle experiments. The unique, long-term, microgravity environment and long operational times on the ISS will offer experimenters the opportunity to modify experiment parameters based on their findings similar to what can be accomplished in ground laboratories. The FIR concept has evolved over time to provide a flexible, 'optics bench' approach to meet the wide variety of anticipated research needs. The FIR's system architecture presented is designed to meet the needs of the <span class="hlt">fluid</span> physics community while operating within the constraints of the available ISS resources.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=power+AND+system&pg=2&id=EJ809327','ERIC'); return false;" href="https://eric.ed.gov/?q=power+AND+system&pg=2&id=EJ809327"><span><span class="hlt">Fluid</span> Power Technician</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Moore, Pam</p> <p>2008-01-01</p> <p><span class="hlt">Fluid</span> power technicians, sometimes called hydraulic and pneumatic technicians, work with equipment that utilizes the pressure of a liquid or gas in a closed container to transmit, multiply, or control power. Working under the supervision of an engineer or engineering staff, they assemble, install, maintain, and test <span class="hlt">fluid</span> power equipment.…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20050237939','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20050237939"><span><span class="hlt">Fluid</span> Bubble Eliminator</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Gonda, Steve R. (Inventor); Tsao, Yow-Min (Inventor); Lee, Wenshan (Inventor)</p> <p>2005-01-01</p> <p>A gas-liquid separator uses a helical passageway to impart a spiral motion to a <span class="hlt">fluid</span> passing therethrough. The centrifugal fore generated by the spiraling motion urges the liquid component of the <span class="hlt">fluid</span> radially outward which forces the gas component radially inward. The gas component is then filtered through a gas-permeable, liquid-impervious membrane and discharged through a central passageway.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20080005118','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20080005118"><span><span class="hlt">Fluid</span> bubble eliminator</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Gonda, Steve R. (Inventor); Tsao, Yow-Min D. (Inventor); Lee, Wenshan (Inventor)</p> <p>2005-01-01</p> <p>A gas-liquid separator uses a helical passageway to impart a spiral motion to a <span class="hlt">fluid</span> passing therethrough. The centrifugal fore generated by the spiraling motion urges the liquid component of the <span class="hlt">fluid</span> radially outward which forces the gas component radially inward. The gas component is then filtered through a gas-permeable, liquid-impervious membrane and discharged through a central passageway.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1175770','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1175770"><span><span class="hlt">Fluid</span> delivery control system</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Hoff, Brian D.; Johnson, Kris William; Algrain, Marcelo C.; Akasam, Sivaprasad</p> <p>2006-06-06</p> <p>A method of controlling the delivery of <span class="hlt">fluid</span> to an engine includes receiving a fuel flow rate signal. An electric pump is arranged to deliver <span class="hlt">fluid</span> to the engine. The speed of the electric pump is controlled based on the fuel flow rate signal.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=newtonian+AND+fluids&id=EJ079907','ERIC'); return false;" href="https://eric.ed.gov/?q=newtonian+AND+fluids&id=EJ079907"><span>Time Independent <span class="hlt">Fluids</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Collyer, A. A.</p> <p>1973-01-01</p> <p>Discusses theories underlying Newtonian and non-Newtonian <span class="hlt">fluids</span> by explaining flow curves exhibited by plastic, shear-thining, and shear-thickening <span class="hlt">fluids</span> and Bingham plastic materials. Indicates that the exact mechanism governing shear-thickening behaviors is a problem of further study. (CC)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25205551','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25205551"><span>[<span class="hlt">Fluid</span> resuscitation in hemorrhage].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Roessler, M; Bode, K; Bauer, M</p> <p>2014-10-01</p> <p>How <span class="hlt">fluid</span> resuscitation has to be performed for acute hemorrhage situations is still controversially discussed. Although the forced administration of crystalloids and colloids has been and still is practiced, nowadays there are good arguments that a cautious infusion of crystalloids may be initially sufficient. Saline should no longer be used for <span class="hlt">fluid</span> resuscitation. The main argument for cautious <span class="hlt">fluid</span> resuscitation is that no large prospective randomized clinical trials exist which have provided evidence of improved survival when <span class="hlt">fluid</span> resuscitation is applied in an aggressive manner. The explanation that no positive effect has so far been observed is that <span class="hlt">fluid</span> resuscitation is thought to boost bleeding by increasing blood pressure and dilutional coagulopathy. Nevertheless, national and international guidelines recommend that <span class="hlt">fluid</span> resuscitation should be applied at the latest when hemorrhage causes hemodynamic instability. Consideration should be given to the fact that damage control resuscitation per se will neither improve already reduced tissue perfusion nor hemostasis. In acute and possibly rapidly progressing hypovolemic shock, colloids can be used. The third and fourth generations of hydroxyethyl starch (HES) are safe and effective if used correctly and within prescribed limits. If <span class="hlt">fluid</span> resuscitation is applied with ongoing re-evaluation of the parameters which determine oxygen supply, it should be possible to keep <span class="hlt">fluid</span> resuscitation restricted without causing undesirable side effects and also to administer a sufficient quantity so that survival of patients is ensured.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://medlineplus.gov/ency/article/003727.htm','NIH-MEDLINEPLUS'); return false;" href="https://medlineplus.gov/ency/article/003727.htm"><span>Peritoneal <span class="hlt">fluid</span> culture</span></a></p> <p><a target="_blank" href="http://medlineplus.gov/">MedlinePlus</a></p> <p></p> <p></p> <p>Culture - peritoneal <span class="hlt">fluid</span> ... sent to the laboratory for Gram stain and culture. The sample is checked to see if bacteria ... The peritoneal <span class="hlt">fluid</span> culture may be negative, even if you have ... diagnosis of peritonitis is based on other factors, in addition ...</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li class="active"><span>19</span></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_19 --> <div id="page_20" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li class="active"><span>20</span></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="381"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://medlineplus.gov/ency/article/002833.htm','NIH-MEDLINEPLUS'); return false;" href="https://medlineplus.gov/ency/article/002833.htm"><span>Lighter <span class="hlt">fluid</span> poisoning</span></a></p> <p><a target="_blank" href="http://medlineplus.gov/">MedlinePlus</a></p> <p></p> <p></p> <p>... 15 minutes. If the person swallowed the lighter <span class="hlt">fluid</span>, give them water or milk right away, if a provider tells you to do so. Do NOT give anything to drink if the person has symptoms ... fumes of the lighter <span class="hlt">fluid</span>, move them to fresh air right away.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19850002740','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19850002740"><span><span class="hlt">Fluids</span> Experiment Apparatus (FEA)</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Martin, M.</p> <p>1984-01-01</p> <p>The <span class="hlt">Fluids</span> Experiment Apparatus FEA is a modular zero gravity chemistry/physics laboratory to support fundamental space processing research. It can be used to conduct basic and applied process or product experiments in general liquid chemistry, crystal growth, <span class="hlt">fluid</span> mechanics, thermodynamics, and cell culturing. The various FEA subsystems are readily configured to perform a wide range of investigations.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=non+AND+Newtonian+AND+fluid&id=EJ079907','ERIC'); return false;" href="http://eric.ed.gov/?q=non+AND+Newtonian+AND+fluid&id=EJ079907"><span>Time Independent <span class="hlt">Fluids</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Collyer, A. A.</p> <p>1973-01-01</p> <p>Discusses theories underlying Newtonian and non-Newtonian <span class="hlt">fluids</span> by explaining flow curves exhibited by plastic, shear-thining, and shear-thickening <span class="hlt">fluids</span> and Bingham plastic materials. Indicates that the exact mechanism governing shear-thickening behaviors is a problem of further study. (CC)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=gas+AND+liquid&pg=3&id=EJ809327','ERIC'); return false;" href="http://eric.ed.gov/?q=gas+AND+liquid&pg=3&id=EJ809327"><span><span class="hlt">Fluid</span> Power Technician</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Moore, Pam</p> <p>2008-01-01</p> <p><span class="hlt">Fluid</span> power technicians, sometimes called hydraulic and pneumatic technicians, work with equipment that utilizes the pressure of a liquid or gas in a closed container to transmit, multiply, or control power. Working under the supervision of an engineer or engineering staff, they assemble, install, maintain, and test <span class="hlt">fluid</span> power equipment.…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2003AAS...203.9413C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2003AAS...203.9413C"><span>Spectra of Hot <span class="hlt">Cores</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Chakrabarti, S.; McKee, C. F.</p> <p>2003-12-01</p> <p>The turbulent <span class="hlt">core</span> model for massive star formation (McKee & Tan 2002) generalizes the standard isothermal collapse model for low-mass stars to include turbulent pressure support. This model predicts reasonable massive star formation times of order 105 years, which is short enough to overcome the radiation pressure of the newly formed star. We calculate the millimeter and infrared spectrum predicted by the turbulent <span class="hlt">core</span> model and compare with observations of several hot molecular <span class="hlt">cores</span>. We consider spherically symmetric dust envelopes and use DUSTY, a 1-D radiative transfer code (Ivezic, Nenkova, Elitzur 1997), to numerically calculate the SEDs of these hot <span class="hlt">cores</span>. We also analytically calculate the spectra in the asymptotic regions of low and high frequency and join these asymptotic forms smoothly by a fitting function that minimizes the relative error between the analytic and numerical spectra. Thus, we are able to express the functional dependence of the spectra of hot <span class="hlt">cores</span> in terms of the dynamical variables of any given collapse model. This approach allows us to use observed SEDs as a diagnostic tool in inferring physical conditions in these <span class="hlt">cores</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1048825','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1048825"><span>MCNP LWR <span class="hlt">Core</span> Generator</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Fischer, Noah A.</p> <p>2012-08-14</p> <p>The reactor <span class="hlt">core</span> input generator allows for MCNP input files to be tailored to design specifications and generated in seconds. Full reactor models can now easily be created by specifying a small set of parameters and generating an MCNP input for a full reactor <span class="hlt">core</span>. Axial zoning of the <span class="hlt">core</span> will allow for density variation in the fuel and moderator, with pin-by-pin fidelity, so that BWR <span class="hlt">cores</span> can more accurately be modeled. LWR <span class="hlt">core</span> work in progress: (1) Reflectivity option for specifying 1/4, 1/2, or full <span class="hlt">core</span> simulation; (2) Axial zoning for moderator densities that vary with height; (3) Generating multiple types of assemblies for different fuel enrichments; and (4) Parameters for specifying BWR box walls. Fuel pin work in progress: (1) Radial and azimuthal zoning for generating further unique materials in fuel rods; (2) Options for specifying different types of fuel for MOX or multiple burn assemblies; (3) Additional options for replacing fuel rods with burnable poison rods; and (4) Control rod/blade modeling.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2007AGUFMGP23A..05S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2007AGUFMGP23A..05S"><span>Understanding <span class="hlt">Core</span>-Mantle Coupling Through Dynamo Models</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Sreenivasan, B.</p> <p>2007-12-01</p> <p><span class="hlt">Core</span>-mantle interaction in the Earth is studied using convection-driven dynamo models. We begin by considering an idealized regime that supports locking of the <span class="hlt">fluid</span> motion and magnetic field to external inhomogeneities. In perfect locking, the azimuthal velocity in the <span class="hlt">fluid</span> <span class="hlt">core</span> has the profile of a thermal wind imposed by the boundary. In strongly convective dynamos, the competition between buoyancy-driven and boundary-driven thermal winds determines the extent of <span class="hlt">fluid</span>-boundary coupling. We go on to show that dynamos with weakly convecting outer layers support locking, whereas strongly convecting outer regions swamp any influence of the lateral variations at the boundary. Finally, we investigate the tomographic boundary condition to see how its individual harmonic components may affect the morphology of the geomagnetic field.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19990115475&hterms=Newton+laws+motion&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D70%26Ntt%3DNewton%2527s%2Blaws%2Bmotion','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19990115475&hterms=Newton+laws+motion&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D70%26Ntt%3DNewton%2527s%2Blaws%2Bmotion"><span>Monitoring Global Geophysical <span class="hlt">Fluids</span> by Space Geodesy</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Chao, Benjamin F.; Dehant, V.; Gross, R. S.; Ray, R. D.; Salstein, D. A.; Watkins, M.</p> <p>1999-01-01</p> <p>Since its establishment on 1/1/1998 by the International Earth Rotation Service, the Coordinating Center for Monitoring Global Geophysical <span class="hlt">Fluids</span> (MGGF) and its seven Special Bureaus have engaged in an effort to support and facilitate the understanding of the geophysical <span class="hlt">fluids</span> in global geodynamics research. Mass transports in the atmosphere-hydrosphere-solid Earth-<span class="hlt">core</span> system (the "global geophysical <span class="hlt">fluids</span>") will cause the following geodynamic effects on a broad time scale: (1) variations in the solid Earth's rotation (in length-of-day and polar motion/nutation) via the conservation of angular momentum and effected by torques at the <span class="hlt">fluid</span>-solid Earth interface; (2) changes in the global gravitational field according to Newton's gravitational law; and (3) motion in the center of mass of the solid Earth relative to that of the whole Earth ("geocenter") via the conservation of linear momentum. These minute signals have become observable by space geodetic techniques, primarily VLBI, SLR, GPS, and DORIS, with ever increasing precision/accuracy and temporal/spatial resolution. Each of the seven Special Bureaus within MGGF is responsible for calculations related to a specific Earth component or aspect -- Atmosphere, Ocean, Hydrology, Ocean Tides, Mantle, <span class="hlt">Core</span>, and Gravity/Geocenter. Angular momenta and torques, gravitational coefficients, and geocenter shift will be computed for geophysical <span class="hlt">fluids</span> based on global observational data, and from state-of-the-art models, some of which assimilate such data. The computed quantities, algorithm and data formats are standardized. The results are archived and made available to the scientific research community. This paper reports the status of the MGGF activities and current results.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19990115475&hterms=Newton+laws+motion&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D60%26Ntt%3DNewton%2527s%2Blaws%2Bmotion','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19990115475&hterms=Newton+laws+motion&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D60%26Ntt%3DNewton%2527s%2Blaws%2Bmotion"><span>Monitoring Global Geophysical <span class="hlt">Fluids</span> by Space Geodesy</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Chao, Benjamin F.; Dehant, V.; Gross, R. S.; Ray, R. D.; Salstein, D. A.; Watkins, M.</p> <p>1999-01-01</p> <p>Since its establishment on 1/1/1998 by the International Earth Rotation Service, the Coordinating Center for Monitoring Global Geophysical <span class="hlt">Fluids</span> (MGGF) and its seven Special Bureaus have engaged in an effort to support and facilitate the understanding of the geophysical <span class="hlt">fluids</span> in global geodynamics research. Mass transports in the atmosphere-hydrosphere-solid Earth-<span class="hlt">core</span> system (the "global geophysical <span class="hlt">fluids</span>") will cause the following geodynamic effects on a broad time scale: (1) variations in the solid Earth's rotation (in length-of-day and polar motion/nutation) via the conservation of angular momentum and effected by torques at the <span class="hlt">fluid</span>-solid Earth interface; (2) changes in the global gravitational field according to Newton's gravitational law; and (3) motion in the center of mass of the solid Earth relative to that of the whole Earth ("geocenter") via the conservation of linear momentum. These minute signals have become observable by space geodetic techniques, primarily VLBI, SLR, GPS, and DORIS, with ever increasing precision/accuracy and temporal/spatial resolution. Each of the seven Special Bureaus within MGGF is responsible for calculations related to a specific Earth component or aspect -- Atmosphere, Ocean, Hydrology, Ocean Tides, Mantle, <span class="hlt">Core</span>, and Gravity/Geocenter. Angular momenta and torques, gravitational coefficients, and geocenter shift will be computed for geophysical <span class="hlt">fluids</span> based on global observational data, and from state-of-the-art models, some of which assimilate such data. The computed quantities, algorithm and data formats are standardized. The results are archived and made available to the scientific research community. This paper reports the status of the MGGF activities and current results.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1035049','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1035049"><span><span class="hlt">Fluid</span> blade disablement tool</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Jakaboski, Juan-Carlos [Albuquerque, NM; Hughs, Chance G [Albuquerque, NM; Todd, Steven N [Rio Rancho, NM</p> <p>2012-01-10</p> <p>A <span class="hlt">fluid</span> blade disablement (FBD) tool that forms both a focused <span class="hlt">fluid</span> projectile that resembles a blade, which can provide precision penetration of a barrier wall, and a broad <span class="hlt">fluid</span> projectile that functions substantially like a hammer, which can produce general disruption of structures behind the barrier wall. Embodiments of the FBD tool comprise a container capable of holding <span class="hlt">fluid</span>, an explosive assembly which is positioned within the container and which comprises an explosive holder and explosive, and a means for detonating. The container has a concavity on the side adjacent to the exposed surface of the explosive. The position of the concavity relative to the explosive and its construction of materials with thicknesses that facilitate inversion and/or rupture of the concavity wall enable the formation of a sharp and coherent blade of <span class="hlt">fluid</span> advancing ahead of the detonation gases.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1983pbem....2..182K','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1983pbem....2..182K"><span><span class="hlt">Fluid</span> structure interaction</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Komatsu, K.</p> <p></p> <p>A few nonflow field problems are considered, taking into account mainly <span class="hlt">fluid</span>-shell dynamic interaction and <span class="hlt">fluid</span>-solid impact. <span class="hlt">Fluid</span>-shell systems are used as models for sloshing and POGO (structure-propulsion coupling oscillation) in liquid rockets, floating lids of oil tanks, large tanks containing <span class="hlt">fluid</span>, nuclear containment vessels, and head injury studies in biomechanics. The study of structure-water impact finds applications in the problems associated with water landings of reentry vehicles, water entry of torpedoes, and slamming of ships in heavy seas. At least three different methods can be used in handling wet structures. Attention is given to the method which treats <span class="hlt">fluid</span> by boundary elements and structure by finite elements.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/21325343','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/21325343"><span>Constraining the dark <span class="hlt">fluid</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Kunz, Martin; Liddle, Andrew R.; Parkinson, David; Gao Changjun</p> <p>2009-10-15</p> <p>Cosmological observations are normally fit under the assumption that the dark sector can be decomposed into dark matter and dark energy components. However, as long as the probes remain purely gravitational, there is no unique decomposition and observations can only constrain a single dark <span class="hlt">fluid</span>; this is known as the dark degeneracy. We use observations to directly constrain this dark <span class="hlt">fluid</span> in a model-independent way, demonstrating, in particular, that the data cannot be fit by a dark <span class="hlt">fluid</span> with a single constant equation of state. Parametrizing the dark <span class="hlt">fluid</span> equation of state by a variety of polynomials in the scale factor a, we use current kinematical data to constrain the parameters. While the simplest interpretation of the dark <span class="hlt">fluid</span> remains that it is comprised of separate dark matter and cosmological constant contributions, our results cover other model types including unified dark energy/matter scenarios.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19870011708','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19870011708"><span>Microgravity <span class="hlt">Fluid</span> Management Symposium</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p></p> <p>1987-01-01</p> <p>The NASA Microgravity <span class="hlt">Fluid</span> Management Symposium, held at the NASA Lewis Research Center, September 9 to 10, 1986, focused on future research in the microgravity <span class="hlt">fluid</span> management field. The symposium allowed researchers and managers to review space applications that require <span class="hlt">fluid</span> management technology, to present the current status of technology development, and to identify the technology developments required for future missions. The 19 papers covered three major categories: (1) <span class="hlt">fluid</span> storage, acquisition, and transfer; (2) <span class="hlt">fluid</span> management applications, i.e., space power and thermal management systems, and environmental control and life support systems; (3) project activities and insights including two descriptions of previous flight experiments and a summary of typical activities required during development of a shuttle flight experiment.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/4261991','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/biblio/4261991"><span><span class="hlt">FLUID</span> SELECTING APPARATUS</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Stinson, W.J.</p> <p>1958-09-16</p> <p>A valve designed to selectively sample <span class="hlt">fluids</span> from a number of sources is described. The valve comprises a rotatable operating lever connected through a bellows seal to a rotatable assembly containing a needle valve, bearings, and a rotational lock. The needle valve is connected through a flexible tube to the sample <span class="hlt">fluid</span> outlet. By rotating the lever the needle valve is placed over . one of several <span class="hlt">fluid</span> sources and locked in position so that the <span class="hlt">fluid</span> is traasferred through the flexible tubing and outlet to a remote sampling system. The <span class="hlt">fluids</span> from the nonselected sources are exhausted to a waste line. This valve constitutes a simple, dependable means of selecting a sample from one of several scurces.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009AGUFM.T52B..02A','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009AGUFM.T52B..02A"><span>Pore <span class="hlt">fluid</span> ‘ages’ suggest <span class="hlt">fluid</span> replacement events across the San Andreas Fault at Depth, Parkfield, CA (Invited)</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Ali, S.; Stute, M.; Torgersen, T.; Hemming, S. R.; Fleisher, M. Q.; Winckler, G.</p> <p>2009-12-01</p> <p>The presence of aqueous reaction produced low strength mineral surfaces is linked to low friction slip along the San Andreas Fault Zone (SAFZ) as shown in <span class="hlt">core</span> samples recovered from the San Andreas Fault Observatory at Depth (SAFOD) in Parkfield, CA. These mineral phases are a product of <span class="hlt">fluid</span>-rock interaction in the fault zone. SAFOD drill <span class="hlt">cores</span> show multiple zones of alteration and deformation due to <span class="hlt">fluid</span>-rock interaction (Schleicher et. al, 2008), which requires transport of <span class="hlt">fluids</span> into the fault zone. We present pore <span class="hlt">fluid</span> ages, age gradients, as well as 3He and 4He isotope profiles of matrix <span class="hlt">fluids</span> obtained from drill <span class="hlt">core</span> samples during SAFOD phases 1, 2, and 3 to constrain <span class="hlt">fluid</span> flow across the SAFZ. Helium and argon concentration profiles in the pore <span class="hlt">fluids</span> suggest the fault represents a sink for 3He, 4He and 40Ar. The 3He/4He profile across the SAFZ confirms the mantle helium signature is introduced from the North American Plate side of the SAFOD drillhole and the lack of mantle-derived <span class="hlt">fluid</span> component through the fault zone. Noble gas measurements on the solid phase indicate that more than 90% of in situ produced He has entered the <span class="hlt">fluid</span> phase. The presence of mantle-derived He in both plates and the fault zone suggests that the <span class="hlt">fluids</span> are accumulating both locally produced and externally produced He. Apparent maximum pore <span class="hlt">fluid</span> ages range from ˜300,000-700,000 years (3050m-measured depth (MD)) in the Pacific Plate and ˜300,000 -500,000 years (3989m-MD) in the North American Plate, compared to relatively younger ages of <200,000 years in the actively creeping trace of the SAFZ at 3300m-MD. The pore <span class="hlt">fluid</span> ages suggest <span class="hlt">fluid</span> flow events on these or shorter timescales in the respective zones. Each <span class="hlt">fluid</span> event results into further dissolution and precipitation in the SAFZ creating a new layer of minerals, which in turn can enhance further slip along the fault.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26524260','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26524260"><span>Electrokinetically modulated peristaltic transport of power-law <span class="hlt">fluids</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Goswami, Prakash; Chakraborty, Jeevanjyoti; Bandopadhyay, Aditya; Chakraborty, Suman</p> <p>2016-01-01</p> <p>The electrokinetically modulated peristaltic transport of power-law <span class="hlt">fluids</span> through a narrow confinement in the form of a deformable tube is investigated. The <span class="hlt">fluid</span> is considered to be divided into two regions - a non-Newtonian <span class="hlt">core</span> region (described by the power-law behavior) which is surrounded by a thin wall-adhering layer of Newtonian <span class="hlt">fluid</span>. This division mimics the occurrence of a wall-adjacent cell-free skimming layer in blood samples typically handled in microfluidic transport. The pumping characteristics and the trapping of the <span class="hlt">fluid</span> bolus are studied by considering the effect of <span class="hlt">fluid</span> viscosities, power-law index and electroosmosis. It is found that the zero-flow pressure rise is strongly dependent on the relative viscosity ratio of the near-wall depleted <span class="hlt">fluid</span> and the <span class="hlt">core</span> <span class="hlt">fluid</span> as well as on the power-law index. The effect of electroosmosis on the pressure rise is strongly manifested at lower occlusion values, thereby indicating its importance in transport modulation for weakly peristaltic flow. It is also established that the phenomenon of trapping may be controlled on-the-fly by tuning the magnitude of the electric field: the trapping vanishes as the magnitude of the electric field is increased. Similarly, the phenomenon of reflux is shown to disappear due to the action of the applied electric field. These findings may be applied for the modulation of pumping in bio-physical environments by means of external electric fields.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2003MSSP...17.1083S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2003MSSP...17.1083S"><span>Vibration Control of Sandwich Beams Using Electro-Rheological <span class="hlt">Fluids</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Srikantha Phani, A.; Venkatraman, K.</p> <p>2003-09-01</p> <p>Electro-rheological (ER) <span class="hlt">fluids</span> are a class of smart materials exhibiting significant reversible changes in their rheological and hence mechanical properties under the influence of an applied electric field. Efforts are in progress to embed ER <span class="hlt">fluids</span> in various structural elements to mitigate vibration problems. The present work is an experimental investigation of the behaviour of a sandwich beam with ER <span class="hlt">fluid</span> acting as the <span class="hlt">core</span> material. A starch-silicone-oil-based ER <span class="hlt">fluid</span> is used in the present study. Significant improvements in the damping properties are achieved in experiments and the damping contributions by viscous and non-viscous forces are estimated by force-state mapping (FSM) technique. With the increase in electric field across the ER <span class="hlt">fluid</span> from 0 to 2 kV, an increase of 25-50% in equivalent viscous damping is observed. It is observed that as concentration of starch is increased, the ER effect grows stronger but eventually is overcome by applied stresses.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/20954714','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/20954714"><span>Free energy density functional for adsorption of <span class="hlt">fluids</span> in nanopores.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Zhou, Shiqi</p> <p>2010-11-16</p> <p>A classical free energy density functional, which is isomorphic to a usual effective hard sphere model + mean field approximation for tail contribution, is proposed for treatment of real <span class="hlt">fluids</span> in inhomogeneous states. In the framework of the classical density functional theory (DFT), the present functional is applied to two representative model <span class="hlt">fluids</span>, namely, a Lennard-Jones <span class="hlt">fluid</span> and a hard <span class="hlt">core</span> attractive Yukawa <span class="hlt">fluid</span>, subject to influence of various external fields. A comprehensive comparison with simulation results and a detailed analysis show that the present functional holds simultaneously all of the desirable properties inherent in an excellent functional, such as high accuracy, computational simplicity, consistency with a hard wall sum rule, nonrecourse to use of adjustable parameter(s) and weighted densities, reproduction of bulk second-order direct correlation function (DCF) in bulk limit, and applicability to subcritical <span class="hlt">fluid</span> phenomena.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/10205048','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/10205048"><span>Viscosity near Earth's solid inner <span class="hlt">core</span></span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Smylie</p> <p>1999-04-16</p> <p>Anomalous splitting of the two equatorial translational modes of oscillation of Earth's solid inner <span class="hlt">core</span> is used to estimate the effective viscosity just outside its boundary. Superconducting gravimeter observations give periods of 3.5822 +/- 0.0012 (retrograde) and 4.0150 +/- 0.0010 (prograde) hours. With the use of Ekman layer theory to estimate viscous drag forces, an inferred single viscosity of 1.22 x 10(11) Pascal seconds gives calculated periods of 3.5839 and 4.0167 hours for the two modes, close to the observed values. The large effective viscosity is consistent with a <span class="hlt">fluid</span>, solid-liquid mixture surrounding the inner <span class="hlt">core</span> associated with the "compositional convection" that drives Earth's geodynamo.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20100042189','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20100042189"><span><span class="hlt">Core</span>-Noise</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Hultgren, Lennart S.</p> <p>2010-01-01</p> <p>This presentation is a technical progress report and near-term outlook for NASA-internal and NASA-sponsored external work on <span class="hlt">core</span> (combustor and turbine) noise funded by the Fundamental Aeronautics Program Subsonic Fixed Wing (SFW) Project. Sections of the presentation cover: the SFW system level noise metrics for the 2015, 2020, and 2025 timeframes; the emerging importance of <span class="hlt">core</span> noise and its relevance to the SFW Reduced-Noise-Aircraft Technical Challenge; the current research activities in the <span class="hlt">core</span>-noise area, with some additional details given about the development of a high-fidelity combustion-noise prediction capability; the need for a <span class="hlt">core</span>-noise diagnostic capability to generate benchmark data for validation of both high-fidelity work and improved models, as well as testing of future noise-reduction technologies; relevant existing <span class="hlt">core</span>-noise tests using real engines and auxiliary power units; and examples of possible scenarios for a future diagnostic facility. The NASA Fundamental Aeronautics Program has the principal objective of overcoming today's national challenges in air transportation. The SFW Reduced-Noise-Aircraft Technical Challenge aims to enable concepts and technologies to dramatically reduce the perceived aircraft noise outside of airport boundaries. This reduction of aircraft noise is critical for enabling the anticipated large increase in future air traffic. Noise generated in the jet engine <span class="hlt">core</span>, by sources such as the compressor, combustor, and turbine, can be a significant contribution to the overall noise signature at low-power conditions, typical of approach flight. At high engine power during takeoff, jet and fan noise have traditionally dominated over <span class="hlt">core</span> noise. However, current design trends and expected technological advances in engine-cycle design as well as noise-reduction methods are likely to reduce non-<span class="hlt">core</span> noise even at engine-power points higher than approach. In addition, future low-emission combustor designs could increase</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li class="active"><span>20</span></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_20 --> <div id="page_21" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li class="active"><span>21</span></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="401"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/989900','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/989900"><span>AIR INGRESS ANALYSIS: COMPUTATIONAL <span class="hlt">FLUID</span> DYNAMIC MODELS</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Chang H. Oh; Eung S. Kim; Richard Schultz; Hans Gougar; David Petti; Hyung S. Kang</p> <p>2010-08-01</p> <p>The Idaho National Laboratory (INL), under the auspices of the U.S. Department of Energy, is performing research and development that focuses on key phenomena important during potential scenarios that may occur in very high temperature reactors (VHTRs). Phenomena Identification and Ranking Studies to date have ranked an air ingress event, following on the heels of a VHTR depressurization, as important with regard to <span class="hlt">core</span> safety. Consequently, the development of advanced air ingress-related models and verification and validation data are a very high priority. Following a loss of coolant and system depressurization incident, air will enter the <span class="hlt">core</span> of the High Temperature Gas Cooled Reactor through the break, possibly causing oxidation of the in-the <span class="hlt">core</span> and reflector graphite structure. Simple <span class="hlt">core</span> and plant models indicate that, under certain circumstances, the oxidation may proceed at an elevated rate with additional heat generated from the oxidation reaction itself. Under postulated conditions of <span class="hlt">fluid</span> flow and temperature, excessive degradation of the lower plenum graphite can lead to a loss of structural support. Excessive oxidation of <span class="hlt">core</span> graphite can also lead to the release of fission products into the confinement, which could be detrimental to a reactor safety. Computational <span class="hlt">fluid</span> dynamic model developed in this study will improve our understanding of this phenomenon. This paper presents two-dimensional and three-dimensional CFD results for the quantitative assessment of the air ingress phenomena. A portion of results of the density-driven stratified flow in the inlet pipe will be compared with results of the experimental results.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/5693060','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/5693060"><span>Enhanced oil recovery. Improved reservoir evaluation object of sponge <span class="hlt">coring</span> process</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Mickey, V.</p> <p>1981-04-01</p> <p>Oil saturation data determined by <span class="hlt">core</span> analysis have improved. One result is the development of the sponge <span class="hlt">coring</span> process. In the sponge <span class="hlt">coring</span> method, the <span class="hlt">core</span> sample is taken in much the same way as in conventional <span class="hlt">coring</span>. The major difference is the porous, hard sponge that lines the <span class="hlt">core</span> barrel. The sponge is so porous (approximately 80%) that cigarette smoke can be blown through it. It has one full darcy permeability and is oil-wet. The sponge is inside a thin polyvinyl chloride liner with small perforations in it. As the sponge <span class="hlt">core</span> barrel is run into the hole, the sponge becomes wet with drilling <span class="hlt">fluid</span>, usually water. Any oil in the <span class="hlt">core</span> being forced out by the water and the reduction in pressure as the <span class="hlt">core</span> is brought to surface is caught by the sponge. Since it is oil-wet the oil is retained. But water is forced out the small perforations in the liner. At the surface the 20-ft <span class="hlt">core</span> is cut into 5-ft sections and put into special containers filled with <span class="hlt">fluid</span> from the formation. That keeps the <span class="hlt">core</span> in standard condition. Even much of the gas in solution remains in the <span class="hlt">core</span>. This is noted during capping operations as the cap is forced back until the glue on it holds and seals the tube.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012AGUFM.V13A2825C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012AGUFM.V13A2825C"><span>Spectroscopic Analysis of Hydrothermal Alteration in Geothermal Drill <span class="hlt">Core</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Calvin, W. M.; Littlefield, E. F.</p> <p>2012-12-01</p> <p>Water geochemistry can vary with depth and location within a geothermal reservoir, owing to natural factors such as changing rock type, gas content, <span class="hlt">fluid</span> source and temperature. The interaction of these variable <span class="hlt">fluids</span> with the host rock will cause changes in the host rock and create a variety of alteration minerals and precipitates. These alteration products can suggest regions of past <span class="hlt">fluid</span> flow in the subsurface and their mineralogy can be used to determine <span class="hlt">fluid</span> temperature. Infrared spectroscopy is particularly good at identifying a wide variety of hydrothermal alteration minerals, requires no sample preparation, and is especially helpful in discrimination among clay minerals. We have applied traditional remote sensing hyperspectral techniques in several pilot studies of geothermal drill <span class="hlt">core</span> and chip analysis. We have surveyed a variety of samples, including drill chip boards, boxed <span class="hlt">core</span>, and drill cuttings from envelopes and chip trays. Alteration mineralogy can indicate both the presence of thermal <span class="hlt">fluids</span> and the hottest <span class="hlt">fluid</span> temperature. These preliminary studies have established reliable methods for <span class="hlt">core</span>/chip surveys that can rapidly measure samples with high depth resolution and show the efficiency of the technique to sample continuously and provide alteration logs similar to geophysical logs. We have successfully identified a wide variety of phyllosilicates, zeolites, opal, calcite, and iron oxides and hydroxides in drill <span class="hlt">core</span> and cuttings from geothermal wells. In high vertical resolution measurements (every 10') we note depth-associated changes in alteration minerals, patterns or zones. Temperature dependent mineral assemblages are found, both gradational with depth and as narrow zones associated with vein or fracture fill. Amorphous silica is clearly identified and seen only in the highest temperature wells. We can readily identify montmorillonite/illite transitions that may be associated with Na/Ca/K variation and may eventually be used for</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016AGUFMDI13A2355M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016AGUFMDI13A2355M"><span>Eddy viscosity of <span class="hlt">core</span> flow inferred from comparison between time evolutions of the length-of-day and a <span class="hlt">core</span> surface flow model</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Matsushima, M.</p> <p>2016-12-01</p> <p>Diffusive processes of large scales in the Earth's <span class="hlt">core</span> are dominated not by the molecular diffusion but by the eddy diffusion. To carry out numerical simulations of realistic geodynamo models, it is important to adopt appropriate parameters. However, the eddy viscous diffusion, or the eddy viscosity, is not a property of the <span class="hlt">core</span> <span class="hlt">fluid</span> but of the <span class="hlt">core</span> flow. Hence it is significant to estimate the eddy viscosity from <span class="hlt">core</span> flow models. In fact, <span class="hlt">fluid</span> motion near the Earth's <span class="hlt">core</span> surface provides useful information on <span class="hlt">core</span> dynamics, features of the <span class="hlt">core</span>-mantle boundary (CMB), and <span class="hlt">core</span>-mantle coupling, for example. Such <span class="hlt">core</span> <span class="hlt">fluid</span> motion can be estimated from spatial and temporal distributions of the geomagnetic field. Most of <span class="hlt">core</span> surface flow models rely on the frozen-flux approximation (Roberts and Scott, 1965), in which the magnetic diffusion is neglected. It should be noted, however, that there exists a viscous boundary layer at the CMB, where the magnetic diffusion may play an important role in secular variations of geomagnetic field. Therefore, a new approach to estimation of <span class="hlt">core</span> surface flow has been devised by Matsushima (2015). That is, the magnetic diffusion is explicitly incorporated within the viscous boundary layer, while it is neglected below the boundary layer at the CMB which is assumed to be a spherical surface. A <span class="hlt">core</span> surface flow model between 1840 and 2015 has been derived from a geomagnetic field model, COV-OBS.x1 (Gillet et al., 2015). Temporal variations of <span class="hlt">core</span> flows contain information on phenomena in relation with <span class="hlt">core</span>-mantle coupling, such as the LOD (length-of-day), and spin-up/spin-down of <span class="hlt">core</span> flows. In particular, <span class="hlt">core</span> surface flows inside the viscous boundary layer at the CMB may reveal an interesting feature in relation with Earth's rotation. We have examined time series of the LOD and vorticity derived from the <span class="hlt">core</span> surface flow model. We have found a possible correlation between the LOD and the axial component of global vorticity</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017JPCM...29C3001G','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017JPCM...29C3001G"><span>Packing in protein <span class="hlt">cores</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Gaines, J. C.; Clark, A. H.; Regan, L.; O'Hern, C. S.</p> <p>2017-07-01</p> <p>Proteins are biological polymers that underlie all cellular functions. The first high-resolution protein structures were determined by x-ray crystallography in the 1960s. Since then, there has been continued interest in understanding and predicting protein structure and stability. It is well-established that a large contribution to protein stability originates from the sequestration from solvent of hydrophobic residues in the protein <span class="hlt">core</span>. How are such hydrophobic residues arranged in the <span class="hlt">core</span>; how can one best model the packing of these residues, and are residues loosely packed with multiple allowed side chain conformations or densely packed with a single allowed side chain conformation? Here we show that to properly model the packing of residues in protein <span class="hlt">cores</span> it is essential that amino acids are represented by appropriately calibrated atom sizes, and that hydrogen atoms are explicitly included. We show that protein <span class="hlt">cores</span> possess a packing fraction of φ ≈ 0.56 , which is significantly less than the typically quoted value of 0.74 obtained using the extended atom representation. We also compare the results for the packing of amino acids in protein <span class="hlt">cores</span> to results obtained for jammed packings from discrete element simulations of spheres, elongated particles, and composite particles with bumpy surfaces. We show that amino acids in protein <span class="hlt">cores</span> pack as densely as disordered jammed packings of particles with similar values for the aspect ratio and bumpiness as found for amino acids. Knowing the structural properties of protein <span class="hlt">cores</span> is of both fundamental and practical importance. Practically, it enables the assessment of changes in the structure and stability of proteins arising from amino acid mutations (such as those identified as a result of the massive human genome sequencing efforts) and the design of new folded, stable proteins and protein-protein interactions with tunable specificity and affinity.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19940002955&hterms=core+business&qs=N%3D0%26Ntk%3DAll%26Ntx%3Dmode%2Bmatchall%26Ntt%3Dcore%2Bbusiness','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19940002955&hterms=core+business&qs=N%3D0%26Ntk%3DAll%26Ntx%3Dmode%2Bmatchall%26Ntt%3Dcore%2Bbusiness"><span>CAC - NUCLEAR THERMAL ROCKET <span class="hlt">CORE</span> ANALYSIS CODE</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Clark, J. S.</p> <p>1994-01-01</p> <p>One of the most important factors in the development of nuclear rocket engine designs is to be able to accurately predict temperatures and pressures throughout a fission nuclear reactor <span class="hlt">core</span> with axial hydrogen flow through circular coolant passages. CAC is an analytical prediction program to study the heat transfer and <span class="hlt">fluid</span> flow characteristics of a circular coolant passage. CAC predicts as a function of time axial and radial <span class="hlt">fluid</span> conditions, passage wall temperatures, flow rates in each coolant passage, and approximate maximum material temperatures. CAC incorporates the hydrogen properties model STATE to provide <span class="hlt">fluid</span>-state relations, thermodynamic properties, and transport properties of molecular hydrogen in any fixed ortho-para combination. The program requires the general <span class="hlt">core</span> geometry, the <span class="hlt">core</span> material properties as a function of temperature, the <span class="hlt">core</span> power profile, and the <span class="hlt">core</span> inlet conditions as function of time. Although CAC was originally developed in FORTRAN IV for use on an IBM 7094, this version is written in ANSI standard FORTRAN 77 and is designed to be machine independent. It has been successfully compiled on IBM PC series and compatible computers running MS-DOS with Lahey F77L, a Sun4 series computer running SunOS 4.1.1, and a VAX series computer running VMS 5.4-3. CAC requires 300K of RAM under MS-DOS, 422K of RAM under SunOS, and 220K of RAM under VMS. No sample executable is provided on the distribution medium. Sample input and output data are included. The standard distribution medium for this program is a 5.25 inch 360K MS-DOS format diskette. CAC was developed in 1966, and this machine independent version was released in 1992. IBM-PC and IBM are registered trademarks of International Business Machines. Lahey F77L is a registered trademark of Lahey Computer Systems, Inc. SunOS is a trademark of Sun Microsystems, Inc. VMS is a trademark of Digital Equipment Corporation. MS-DOS is a registered trademark of Microsoft Corporation.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19940002955&hterms=ortho&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D80%26Ntt%3Dortho','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19940002955&hterms=ortho&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D80%26Ntt%3Dortho"><span>CAC - NUCLEAR THERMAL ROCKET <span class="hlt">CORE</span> ANALYSIS CODE</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Clark, J. S.</p> <p>1994-01-01</p> <p>One of the most important factors in the development of nuclear rocket engine designs is to be able to accurately predict temperatures and pressures throughout a fission nuclear reactor <span class="hlt">core</span> with axial hydrogen flow through circular coolant passages. CAC is an analytical prediction program to study the heat transfer and <span class="hlt">fluid</span> flow characteristics of a circular coolant passage. CAC predicts as a function of time axial and radial <span class="hlt">fluid</span> conditions, passage wall temperatures, flow rates in each coolant passage, and approximate maximum material temperatures. CAC incorporates the hydrogen properties model STATE to provide <span class="hlt">fluid</span>-state relations, thermodynamic properties, and transport properties of molecular hydrogen in any fixed ortho-para combination. The program requires the general <span class="hlt">core</span> geometry, the <span class="hlt">core</span> material properties as a function of temperature, the <span class="hlt">core</span> power profile, and the <span class="hlt">core</span> inlet conditions as function of time. Although CAC was originally developed in FORTRAN IV for use on an IBM 7094, this version is written in ANSI standard FORTRAN 77 and is designed to be machine independent. It has been successfully compiled on IBM PC series and compatible computers running MS-DOS with Lahey F77L, a Sun4 series computer running SunOS 4.1.1, and a VAX series computer running VMS 5.4-3. CAC requires 300K of RAM under MS-DOS, 422K of RAM under SunOS, and 220K of RAM under VMS. No sample executable is provided on the distribution medium. Sample input and output data are included. The standard distribution medium for this program is a 5.25 inch 360K MS-DOS format diskette. CAC was developed in 1966, and this machine independent version was released in 1992. IBM-PC and IBM are registered trademarks of International Business Machines. Lahey F77L is a registered trademark of Lahey Computer Systems, Inc. SunOS is a trademark of Sun Microsystems, Inc. VMS is a trademark of Digital Equipment Corporation. MS-DOS is a registered trademark of Microsoft Corporation.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017AcAau.130...43K','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017AcAau.130...43K"><span>Steady flows in rotating spherical cavity excited by multi-frequency oscillations of free inner <span class="hlt">core</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Kozlov, Victor G.; Kozlov, Nikolai V.; Subbotin, Stanislav V.</p> <p>2017-01-01</p> <p><span class="hlt">Fluid</span> motion in a rotating spherical cavity in the conditions of resonant oscillations of free inner <span class="hlt">core</span> is experimentally investigated. The centrifugal force retains a solid <span class="hlt">core</span> with density less than the <span class="hlt">fluid</span> density near the center of the cavity. In the absence of external force field the system "solid <span class="hlt">core</span> - liquid" performs solid body rotation. The oscillations of the <span class="hlt">core</span> are excited by an external oscillating force field and this results in differential rotation of the <span class="hlt">core</span> with respect to the cavity. The direction of rotation is determined by the ratio of the oscillation frequency to the cavity angular velocity. The <span class="hlt">core</span> oscillations with the radian frequency, which exceeds the cavity angular velocity, are investigated. It is found that a steady flow in the form of a system of nested <span class="hlt">fluid</span> columns of circular cross section, which rotate at different angular velocities, is generated in the cavity as a result of oscillations of the <span class="hlt">core</span> and the <span class="hlt">fluid</span>. It is shown that at simultaneous influence of several oscillating fields the resulting steady flow is determined by a linear superposition of the flows, which are excited by the oscillations of the inner <span class="hlt">core</span> with different frequencies. At a certain ratio of the vibration frequency to the rotation one the transformation of the circular shape of the column into the elliptical one is observed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/896522','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/896522"><span>Enhanced Wellbore Stabilization and Reservoir Productivity with Aphron Drilling <span class="hlt">Fluid</span> Technology</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Tatiana Hoff; Fred Growcock</p> <p>2004-12-30</p> <p><span class="hlt">Core</span> Leak-off tests are commonly used to ascertain the ability of a drilling <span class="hlt">fluid</span> to seal permeable rock under downhole conditions. Unfortunately, these tests are expensive and require a long time to set up. To monitor <span class="hlt">fluid</span> invasion trends and to evaluate potential treatments for reducing <span class="hlt">fluid</span> invasion on location, a simpler screening test is highly desirable. The Capillary Suction Time (CST) Test has been used since the 1970's as a fast, yet reliable, method for characterizing <span class="hlt">fluid</span> filterability and the condition of colloidal materials in water treatment facilities and drilling <span class="hlt">fluids</span>. For the latter, it has usually been applied to determine the state of flocculation of clay-bearing <span class="hlt">fluids</span> and to screen potential shale inhibitors. In this work, the CST method was evaluated as a screening tool for predicting relative invasion rates of drilling <span class="hlt">fluids</span> in permeable <span class="hlt">cores</span>. However, the drilling <span class="hlt">fluids</span> examined--DRILPLEX, FLOPRO, and APHRON ICS--are all designed to generate low <span class="hlt">fluid</span> loss and give CST values that are so high that <span class="hlt">fluid</span> invasion comes to be dominated by experimental artifacts, such as <span class="hlt">fluid</span> evaporation. As described in this work, the CST procedure was modified so as to minimize such artifacts and permit differentiation of the <span class="hlt">fluids</span> under investigation.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24979713','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24979713"><span>The ideal <span class="hlt">fluid</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Russell, Lyndal; McLean, Anthony S</p> <p>2014-08-01</p> <p>The characteristics of an ideal intravenous <span class="hlt">fluid</span> in the critically ill patient are discussed. Intravenous <span class="hlt">fluids</span> are the most frequent drug administered to patients. Questioning the use of commonly administered intravenous <span class="hlt">fluids</span> has resulted in an increased focus on their efficacy and safety. Discrimination between <span class="hlt">fluids</span> currently in use has been the central theme of many recent large studies, and emerging from these findings is an understanding of characteristics that would make for an ideal <span class="hlt">fluid</span> for critically ill patients. There is increased morbidity and mortality with high chloride-containing crystalloid solutions and hydroxyethyl starch preparations, with resultant international governmental agency warnings regarding hydroxyethyl starch . The ideal <span class="hlt">fluid</span> is one which achieves the aim of administration while minimizing or negating adverse effects, is inexpensive, and sufficiently stable when stored to be used in a wide range of clinical settings. The ideal <span class="hlt">fluid</span> currently does not exist. Of existing options, use of hydroxyethyl starches and high chloride-containing crystalloid solutions should be discouraged. There is a lack of direct evidence that a balanced crystalloid solution confers benefit, however, the trend of recent data would support future investigation into the advantage of balanced solution over 0.9% saline.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28216569','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28216569"><span>Micromachined <span class="hlt">Fluid</span> Inertial Sensors.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Liu, Shiqiang; Zhu, Rong</p> <p>2017-02-14</p> <p>Micromachined <span class="hlt">fluid</span> inertial sensors are an important class of inertial sensors, which mainly includes thermal accelerometers and <span class="hlt">fluid</span> gyroscopes, which have now been developed since the end of the last century for about 20 years. Compared with conventional silicon or quartz inertial sensors, the <span class="hlt">fluid</span> inertial sensors use a <span class="hlt">fluid</span> instead of a solid proof mass as the moving and sensitive element, and thus offer advantages of simple structures, low cost, high shock resistance, and large measurement ranges while the sensitivity and bandwidth are not competitive. Many studies and various designs have been reported in the past two decades. This review firstly introduces the working principles of <span class="hlt">fluid</span> inertial sensors, followed by the relevant research developments. The micromachined thermal accelerometers based on thermal convection have developed maturely and become commercialized. However, the micromachined <span class="hlt">fluid</span> gyroscopes, which are based on jet flow or thermal flow, are less mature. The key issues and technologies of the thermal accelerometers, mainly including bandwidth, temperature compensation, monolithic integration of tri-axis accelerometers and strategies for high production yields are also summarized and discussed. For the micromachined <span class="hlt">fluid</span> gyroscopes, improving integration and sensitivity, reducing thermal errors and cross coupling errors are the issues of most concern.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5336013','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5336013"><span>Micromachined <span class="hlt">Fluid</span> Inertial Sensors</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Liu, Shiqiang; Zhu, Rong</p> <p>2017-01-01</p> <p>Micromachined <span class="hlt">fluid</span> inertial sensors are an important class of inertial sensors, which mainly includes thermal accelerometers and <span class="hlt">fluid</span> gyroscopes, which have now been developed since the end of the last century for about 20 years. Compared with conventional silicon or quartz inertial sensors, the <span class="hlt">fluid</span> inertial sensors use a <span class="hlt">fluid</span> instead of a solid proof mass as the moving and sensitive element, and thus offer advantages of simple structures, low cost, high shock resistance, and large measurement ranges while the sensitivity and bandwidth are not competitive. Many studies and various designs have been reported in the past two decades. This review firstly introduces the working principles of <span class="hlt">fluid</span> inertial sensors, followed by the relevant research developments. The micromachined thermal accelerometers based on thermal convection have developed maturely and become commercialized. However, the micromachined <span class="hlt">fluid</span> gyroscopes, which are based on jet flow or thermal flow, are less mature. The key issues and technologies of the thermal accelerometers, mainly including bandwidth, temperature compensation, monolithic integration of tri-axis accelerometers and strategies for high production yields are also summarized and discussed. For the micromachined <span class="hlt">fluid</span> gyroscopes, improving integration and sensitivity, reducing thermal errors and cross coupling errors are the issues of most concern. PMID:28216569</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25208956','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25208956"><span>Evolution of <span class="hlt">fluid</span> therapy.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Kampmeier, Tim; Rehberg, Sebastian; Ertmer, Christian</p> <p>2014-09-01</p> <p>The human organism consists of evolutionary conserved mechanisms to prevent death from hypovolaemia. Intravenous <span class="hlt">fluid</span> therapy to support these mechanisms had first been published about 180 years ago. The present review depicts the evolution of <span class="hlt">fluid</span> therapy from early, not well-defined solutions up to modern balanced <span class="hlt">fluids</span>. Notably, evidence accumulates that the most commonly used <span class="hlt">fluid</span> (i.e. 0.9% saline) has no advantage over balanced solutions, increases the risk of acute kidney injury and should therefore be abandoned. Notably, in published trials, the prognostically important 'golden hours' of shock, where <span class="hlt">fluid</span> therapy may be essential, have not been adequately addressed. It is therefore unclear whether negative data on colloids in some trials reflect real harm or rather inadequate use. Future studies should focus on optimal protocols for initiation, dosing and discontinuation of <span class="hlt">fluid</span> therapy in specific disease entities. Moreover, the practice of de-resuscitation after <span class="hlt">fluid</span>-based haemodynamic stabilization should be further investigated. Copyright © 2014 Elsevier Ltd. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/6374361','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/biblio/6374361"><span><span class="hlt">Fluid</span> sampling tool</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Garcia, A.R.; Johnston, R.G.; Martinez, R.K.</p> <p>1999-05-25</p> <p>A <span class="hlt">fluid</span> sampling tool is described for sampling <span class="hlt">fluid</span> from a container. The tool has a <span class="hlt">fluid</span> collecting portion which is drilled into the container wall, thereby affixing it to the wall. The tool may have a <span class="hlt">fluid</span> extracting section which withdraws <span class="hlt">fluid</span> collected by the <span class="hlt">fluid</span> collecting section. The <span class="hlt">fluid</span> collecting section has a fluted shank with an end configured to drill a hole into a container wall. The shank has a threaded portion for tapping the borehole. The shank is threadably engaged to a cylindrical housing having an inner axial passageway sealed at one end by a septum. A flexible member having a cylindrical portion and a bulbous portion is provided. The housing can be slid into an inner axial passageway in the cylindrical portion and sealed to the flexible member. The bulbous portion has an outer lip defining an opening. The housing is clamped into the chuck of a drill, the lip of the bulbous section is pressed against a container wall until the shank touches the wall, and the user operates the drill. Wall shavings (kerf) are confined in a chamber formed in the bulbous section as it folds when the shank advances inside the container. After sufficient advancement of the shank, an o-ring makes a seal with the container wall. 6 figs.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/826022','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/826022"><span>FRACTURING <span class="hlt">FLUID</span> CHARACTERIZATION FACILITY</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Subhash Shah</p> <p>2000-08-01</p> <p>Hydraulic fracturing technology has been successfully applied for well stimulation of low and high permeability reservoirs for numerous years. Treatment optimization and improved economics have always been the key to the success and it is more so when the reservoirs under consideration are marginal. <span class="hlt">Fluids</span> are widely used for the stimulation of wells. The Fracturing <span class="hlt">Fluid</span> Characterization Facility (FFCF) has been established to provide the accurate prediction of the behavior of complex fracturing <span class="hlt">fluids</span> under downhole conditions. The primary focus of the facility is to provide valuable insight into the various mechanisms that govern the flow of fracturing <span class="hlt">fluids</span> and slurries through hydraulically created fractures. During the time between September 30, 1992, and March 31, 2000, the research efforts were devoted to the areas of <span class="hlt">fluid</span> rheology, proppant transport, proppant flowback, dynamic <span class="hlt">fluid</span> loss, perforation pressure losses, and frictional pressure losses. In this regard, a unique above-the-ground fracture simulator was designed and constructed at the FFCF, labeled ''The High Pressure Simulator'' (HPS). The FFCF is now available to industry for characterizing and understanding the behavior of complex <span class="hlt">fluid</span> systems. To better reflect and encompass the broad spectrum of the petroleum industry, the FFCF now operates under a new name of ''The Well Construction Technology Center'' (WCTC). This report documents the summary of the activities performed during 1992-2000 at the FFCF.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/872303','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/872303"><span><span class="hlt">Fluid</span> sampling tool</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Garcia, Anthony R.; Johnston, Roger G.; Martinez, Ronald K.</p> <p>1999-05-25</p> <p>A <span class="hlt">fluid</span> sampling tool for sampling <span class="hlt">fluid</span> from a container. The tool has a <span class="hlt">fluid</span> collecting portion which is drilled into the container wall, thereby affixing it to the wall. The tool may have a <span class="hlt">fluid</span> extracting section which withdraws <span class="hlt">fluid</span> collected by the <span class="hlt">fluid</span> collecting section. The <span class="hlt">fluid</span> collecting section has a fluted shank with an end configured to drill a hole into a container wall. The shank has a threaded portion for tapping the borehole. The shank is threadably engaged to a cylindrical housing having an inner axial passageway sealed at one end by a septum. A flexible member having a cylindrical portion and a bulbous portion is provided. The housing can be slid into an inner axial passageway in the cylindrical portion and sealed to the flexible member. The bulbous portion has an outer lip defining an opening. The housing is clamped into the chuck of a drill, the lip of the bulbous section is pressed against a container wall until the shank touches the wall, and the user operates the drill. Wall shavings (kerf) are confined in a chamber formed in the bulbous section as it folds when the shank advances inside the container. After sufficient advancement of the shank, an o-ring makes a seal with the container wall.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20110011338','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20110011338"><span><span class="hlt">Core</span> Noise - Increasing Importance</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Hultgren, Lennart S.</p> <p>2011-01-01</p> <p>This presentation is a technical summary of and outlook for NASA-internal and NASA-sponsored external research on <span class="hlt">core</span> (combustor and turbine) noise funded by the Fundamental Aeronautics Program Subsonic Fixed Wing (SFW) Project. Sections of the presentation cover: the SFW system-level noise metrics for the 2015, 2020, and 2025 timeframes; turbofan design trends and their aeroacoustic implications; the emerging importance of <span class="hlt">core</span> noise and its relevance to the SFW Reduced-Perceived-Noise Technical Challenge; and the current research activities in the <span class="hlt">core</span>-noise area, with additional details given about the development of a high-fidelity combustor-noise prediction capability as well as activities supporting the development of improved reduced-order, physics-based models for combustor-noise prediction. The need for benchmark data for validation of high-fidelity and modeling work and the value of a potential future diagnostic facility for testing of <span class="hlt">core</span>-noise-reduction concepts are indicated. The NASA Fundamental Aeronautics Program has the principal objective of overcoming today's national challenges in air transportation. The SFW Reduced-Perceived-Noise Technical Challenge aims to develop concepts and technologies to dramatically reduce the perceived aircraft noise outside of airport boundaries. This reduction of aircraft noise is critical to enabling the anticipated large increase in future air traffic. Noise generated in the jet engine <span class="hlt">core</span>, by sources such as the compressor, combustor, and turbine, can be a significant contribution to the overall noise signature at low-power conditions, typical of approach flight. At high engine power during takeoff, jet and fan noise have traditionally dominated over <span class="hlt">core</span> noise. However, current design trends and expected technological advances in engine-cycle design as well as noise-reduction methods are likely to reduce non-<span class="hlt">core</span> noise even at engine-power points higher than approach. In addition, future low-emission combustor</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20120000844','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20120000844"><span><span class="hlt">Core</span> Noise Reduction</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Hultgren, Lennart S.</p> <p>2011-01-01</p> <p>This presentation is a technical summary of and outlook for NASA-internal and NASA-sponsored external research on <span class="hlt">core</span> (combustor and turbine) noise funded by the Fundamental Aeronautics Program Subsonic Fixed Wing (SFW) Project. Sections of the presentation cover: the SFW system-level noise metrics for the 2015, 2020, and 2025 timeframes; turbofan design trends and their aeroacoustic implications; the emerging importance of <span class="hlt">core</span> noise and its relevance to the SFW Reduce-Perceived-Noise Technical Challenge; and the current research activities in the <span class="hlt">core</span> noise area. Recent work1 on the turbine-transmission loss of combustor noise is briefly described, two2,3 new NRA efforts in the <span class="hlt">core</span>-noise area are outlined, and an effort to develop CMC-based acoustic liners for broadband noise reduction suitable for turbofan-<span class="hlt">core</span> application is delineated. The NASA Fundamental Aeronautics Program has the principal objective of overcoming today's national challenges in air transportation. The reduction of aircraft noise is critical to enabling the anticipated large increase in future air traffic. The Subsonic Fixed Wing Project's Reduce-Perceived-Noise Technical Challenge aims to develop concepts and technologies to dramatically reduce the perceived aircraft noise outside of airport boundaries.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011PhFl...23g2105B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011PhFl...23g2105B"><span>Forced instability of <span class="hlt">core</span>-annular flow in capillary constrictions</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Beresnev, Igor; Gaul, William; Vigil, R. Dennis</p> <p>2011-07-01</p> <p>Instability of <span class="hlt">fluid</span> cylinders and jets, a highly nonlinear hydrodynamic phenomenon, has fascinated researchers for nearly 150 years. A subset of the phenomenon is the <span class="hlt">core</span>-annular flow, in which a non-wetting <span class="hlt">core</span> <span class="hlt">fluid</span> and a surrounding wall-wetting annulus flow through a solid channel. The model, for example, represents the flow of oil in petroleum reservoirs. The flow may be forced to break up when passing through a channel's constriction. Although it has long been observed that the breakup occurs near the neck of the constriction, the exact conditions for the occurrence of the forced breakup and its dynamic theory have not been understood. Here, we test a simple geometric conjecture that the <span class="hlt">fluid</span> will always break in the constrictions of all channels with sufficiently long wavelengths, regardless of the <span class="hlt">fluid</span> properties. We also test a theory of the phenomenon. Four constricted glass tubes were fabricated above and below the critical wavelength required for the <span class="hlt">fluid</span> disintegration. In a direct laboratory experiment, the breakup occurred according to the conjecture: the <span class="hlt">fluids</span> were continuous in the shorter tubes but disintegrated in the longer tubes. The evolution of the interface to its pinch-off was recorded using high-speed digital photography. The experimentally observed <span class="hlt">core</span>-annulus interface profiles agreed well with the theory, although the total durations of the process agreed less satisfactorily. Nonetheless, as the theory predicts, the ratio between the experimental and theoretical times of the breakup process tends to one with decreasing capillary number. The breakup condition and the dynamic theory of <span class="hlt">fluid</span> disintegration in constricted channels can serve as quantitative models of this important natural and technical phenomenon.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012AGUFMOS41E..08T','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012AGUFMOS41E..08T"><span>Results of SO222; Pore <span class="hlt">fluid</span> chemistry of the Kumano Basin mud volcanoes, Japan</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Tryon, M. D.; Kopf, A.; Madison, M. J.</p> <p>2012-12-01</p> <p>The primary hypotheses driving the MeMo Project at the mud volcanoes of the Kumano Basin, arcward of the NanTroSEIZE IODP drilling transect, are: 1) Much, if not most, of the chemically bound water released from depths corresponding to the transition from aseismic to seismogenic behavior are being transported via the subduction factory's intermediate loop, i.e., upwards through the wedge via faults and the fractured upper plate, and 2), the Kumano Basin mud volcanoes tap these <span class="hlt">fluids</span> and may provide insights on <span class="hlt">fluid</span> genesis and pathways within the Nankai forearc. During RV Sonne cruise SO222 (Jun-Jul 2012) we collected 600+ pore <span class="hlt">fluid</span> samples from 6 MeBo drill <span class="hlt">cores</span> (up to 35 mbsf) and 39 gravity <span class="hlt">cores</span> (up to 8 mbsf). With few exceptions, the <span class="hlt">cores</span> from mud volcanoes indicate two trends of <span class="hlt">fluid</span> freshening with depth; a shallow freshening trend and a deeper freshening trend. Our initial thoughts on this is that the large amount of shallow freshening in the gravity <span class="hlt">cores</span> is due to gas hydrate dissociation during <span class="hlt">core</span> recovery and processing, and the deeper freshening trend may be due to advection of <span class="hlt">fluids</span> influence by mineral dehydration at great depth. At this point, the <span class="hlt">fluids</span> have just arrived back at the lab and further analyses are about to begin. We will report here on the initial results and present preliminary thoughts on the genesis of the <span class="hlt">fluids</span> being emitted at the mud volcanoes.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li class="active"><span>21</span></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_21 --> <div id="page_22" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li class="active"><span>22</span></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="421"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1027898','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1027898"><span>PRISMATIC <span class="hlt">CORE</span> COUPLED TRANSIENT BENCHMARK</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>J. Ortensi; M.A. Pope; G. Strydom; R.S. Sen; M.D. DeHart; H.D. Gougar; C. Ellis; A. Baxter; V. Seker; T.J. Downar; K. Vierow; K. Ivanov</p> <p>2011-06-01</p> <p>The Prismatic Modular Reactor (PMR) is one of the High Temperature Reactor (HTR) design concepts that have existed for some time. Several prismatic units have operated in the world (DRAGON, Fort St. Vrain, Peach Bottom) and one unit is still in operation (HTTR). The deterministic neutronics and thermal-<span class="hlt">fluids</span> transient analysis tools and methods currently available for the design and analysis of PMRs have lagged behind the state of the art compared to LWR reactor technologies. This has motivated the development of more accurate and efficient tools for the design and safety evaluations of the PMR. In addition to the work invested in new methods, it is essential to develop appropriate benchmarks to verify and validate the new methods in computer codes. The purpose of this benchmark is to establish a well-defined problem, based on a common given set of data, to compare methods and tools in <span class="hlt">core</span> simulation and thermal hydraulics analysis with a specific focus on transient events. The benchmark-working group is currently seeking OECD/NEA sponsorship. This benchmark is being pursued and is heavily based on the success of the PBMR-400 exercise.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1156945','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1156945"><span>Multiphase <span class="hlt">fluid</span> characterization system</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Sinha, Dipen N.</p> <p>2014-09-02</p> <p>A measurement system and method for permitting multiple independent measurements of several physical parameters of multiphase <span class="hlt">fluids</span> flowing through pipes are described. Multiple acoustic transducers are placed in acoustic communication with or attached to the outside surface of a section of existing spool (metal pipe), typically less than 3 feet in length, for noninvasive measurements. Sound speed, sound attenuation, <span class="hlt">fluid</span> density, <span class="hlt">fluid</span> flow, container wall resonance characteristics, and Doppler measurements for gas volume fraction may be measured simultaneously by the system. Temperature measurements are made using a temperature sensor for oil-cut correction.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19910021217','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19910021217"><span>Fundamentals of <span class="hlt">fluid</span> lubrication</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Hamrock, Bernard J.</p> <p>1991-01-01</p> <p>The aim is to coordinate the topics of design, engineering dynamics, and <span class="hlt">fluid</span> dynamics in order to aid researchers in the area of <span class="hlt">fluid</span> film lubrication. The lubrication principles that are covered can serve as a basis for the engineering design of machine elements. The fundamentals of <span class="hlt">fluid</span> film lubrication are presented clearly so that students that use the book will have confidence in their ability to apply these principles to a wide range of lubrication situations. Some guidance on applying these fundamentals to the solution of engineering problems is also provided.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/869559','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/869559"><span>Supercritical <span class="hlt">fluid</span> extraction</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Wai, Chien M.; Laintz, Kenneth</p> <p>1994-01-01</p> <p>A method of extracting metalloid and metal species from a solid or liquid material by exposing the material to a supercritical <span class="hlt">fluid</span> solvent containing a chelating agent. The chelating agent forms chelates that are soluble in the supercritical <span class="hlt">fluid</span> to allow removal of the species from the material. In preferred embodiments, the extraction solvent is supercritical carbon dioxide and the chelating agent is a fluorinated or lipophilic crown ether or fluorinated dithiocarbamate. The method provides an environmentally benign process for removing contaminants from industrial waste without using acids or biologically harmful solvents. The chelate and supercritical <span class="hlt">fluid</span> can be regenerated, and the contaminant species recovered, to provide an economic, efficient process.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19800033281&hterms=photochromic&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3Dphotochromic','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19800033281&hterms=photochromic&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3Dphotochromic"><span>Geophysical <span class="hlt">fluid</span> flow experiment</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Broome, B. G.; Fichtl, G.; Fowlis, W.</p> <p>1979-01-01</p> <p>The essential <span class="hlt">fluid</span> flow processes associated with the solar and Jovian atmospheres will be examined in a laboratory experiment scheduled for performance on Spacelab Missions One and Three. The experimental instrumentation required to generate and to record convective <span class="hlt">fluid</span> flow is described. Details of the optical system configuration, the lens design, and the optical coatings are described. Measurement of thermal gradient fields by schlieren techniques and measurement of <span class="hlt">fluid</span> flow velocity fields by photochromic dye tracers is achieved with a common optical system which utilizes photographic film for data recording. Generation of the photochromic dye tracers is described, and data annotation of experimental parameters on the film record is discussed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/509422','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/509422"><span>Classifications of <span class="hlt">fluid</span> systems</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p></p> <p>1997-06-01</p> <p>Descriptions of <span class="hlt">fluid</span>-system classifications, product functions and source companies are listed on these pages. System descriptions and product definitions have been kept as simple as possible and, wherever practical, reflect general industry practice and terminology consistent with descriptions adopted by the American Petroleum Institute (API) and the International Association of Drilling Contractors (IADC). Nine distinct <span class="hlt">fluid</span> systems are defined, with the first six being water-based. Next are oil- and synthetic-based systems, along with the last, which consists of air, mist, foam or gas as the circulating medium. All chemicals and <span class="hlt">fluid</span> systems listed in these tables are designed for use in drilling, completion and workover operations.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19760012374','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19760012374"><span>Fundamentals of <span class="hlt">fluid</span> sealing</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Zuk, J.</p> <p>1976-01-01</p> <p>The fundamentals of <span class="hlt">fluid</span> sealing, including seal operating regimes, are discussed and the general <span class="hlt">fluid</span>-flow equations for <span class="hlt">fluid</span> sealing are developed. Seal performance parameters such as leakage and power loss are presented. Included in the discussion are the effects of geometry, surface deformations, rotation, and both laminar and turbulent flows. The concept of pressure balancing is presented, as are differences between liquid and gas sealing. Mechanisms of seal surface separation, fundamental friction and wear concepts applicable to seals, seal materials, and pressure-velocity (PV) criteria are discussed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2010ctl..book...35B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2010ctl..book...35B"><span>Synthetic Base <span class="hlt">Fluids</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Brown, M.; Fotheringham, J. D.; Hoyes, T. J.; Mortier, R. M.; Orszulik, S. T.; Randles, S. J.; Stroud, P. M.</p> <p></p> <p>The chemical nature and technology of the main synthetic lubricant base <span class="hlt">fluids</span> is described, covering polyalphaolefins, alkylated aromatics, gas-to-liquid (GTL) base <span class="hlt">fluids</span>, polybutenes, aliphatic diesters, polyolesters, polyalkylene glycols or PAGs and phosphate esters.Other synthetic lubricant base oils such as the silicones, borate esters, perfluoroethers and polyphenylene ethers are considered to have restricted applications due to either high cost or performance limitations and are not considered here.Each of the main synthetic base <span class="hlt">fluids</span> is described for their chemical and physical properties, manufacture and production, their chemistry, key properties, applications and their implications when used in the environment.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1990tsse....3..225W','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1990tsse....3..225W"><span>Space Station <span class="hlt">fluid</span> resupply</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Winters, Al</p> <p></p> <p>Viewgraphs on space station <span class="hlt">fluid</span> resupply are presented. Space Station Freedom is resupplied with supercritical O2 and N2 for the ECLSS and USL on a 180 day resupply cycle. Resupply <span class="hlt">fluids</span> are stored in the subcarriers on station between resupply cycles and transferred to the users as required. ECLSS contingency <span class="hlt">fluids</span> (O2 and N2) are supplied and stored on station in a gaseous state. Efficiency and flexibility are major design considerations. Subcarrier approach allows multiple manifest combinations. Growth is achieved by adding modular subcarriers.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/10472063','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/10472063"><span>Amniotic <span class="hlt">fluid</span> embolism.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Locksmith, G J</p> <p>1999-09-01</p> <p>Amniotic <span class="hlt">fluid</span> embolism occurs rarely but is one of the leading causes of maternal mortality in the United States. The risk of death associated with this syndrome is 60% to 80% with half of survivors suffering long-term neurologic disability. The pathophysiology of amniotic <span class="hlt">fluid</span> embolism is poorly understood. A review of the largest case series to date concluded that the physiologic and hematologic manifestations bear a greater resemblance to septic and anaphylactic shock than to any embolic phenomenon. Care of the patient who suffers amniotic <span class="hlt">fluid</span> embolism is supportive. To date, no therapeutic interventions have been found to improve survival.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.dtic.mil/docs/citations/ADA527987','DTIC-ST'); return false;" href="http://www.dtic.mil/docs/citations/ADA527987"><span>Observability of Viscoelastic <span class="hlt">Fluids</span></span></a></p> <p><a target="_blank" href="http://www.dtic.mil/">DTIC Science & Technology</a></p> <p></p> <p>2010-01-01</p> <p>THIS PAGE unclassified Standard Form 298 (Rev. 8-98) Prescribed by ANSI Std Z39-18 Author’s personal copy J. Non - Newtonian <span class="hlt">Fluid</span> Mech. 165 (2010) 425...434 Contents lists available at ScienceDirect Journal of Non - Newtonian <span class="hlt">Fluid</span> Mechanics journa l homepage: www.e lsev ier .com/ locate / jnnfm...by Elsevier B.V. doi:10.1016/j.jnnfm.2010.01.025 Author’s personal copy 426 H. Zhou et al. / J. Non - Newtonian <span class="hlt">Fluid</span> Mech. 165 (2010) 425–434 the</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=magnetic+AND+fluid&id=EJ318960','ERIC'); return false;" href="https://eric.ed.gov/?q=magnetic+AND+fluid&id=EJ318960"><span>Magnetic <span class="hlt">Fluids</span>--Part 1.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Hoon, S. R.; Tanner, B. K.</p> <p>1985-01-01</p> <p>Basic physical concepts of importance in understanding magnetic <span class="hlt">fluids</span> (fine ferromagnetic particles suspended in a liquid) are discussed. They include home-made magnetic <span class="hlt">fluids</span>, stable magnetic <span class="hlt">fluids</span>, and particle surfactants. (DH)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=%22magnetic+fluid%22&id=EJ318960','ERIC'); return false;" href="http://eric.ed.gov/?q=%22magnetic+fluid%22&id=EJ318960"><span>Magnetic <span class="hlt">Fluids</span>--Part 1.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Hoon, S. R.; Tanner, B. K.</p> <p>1985-01-01</p> <p>Basic physical concepts of importance in understanding magnetic <span class="hlt">fluids</span> (fine ferromagnetic particles suspended in a liquid) are discussed. They include home-made magnetic <span class="hlt">fluids</span>, stable magnetic <span class="hlt">fluids</span>, and particle surfactants. (DH)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/205154','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/205154"><span>Physical properties of preserved <span class="hlt">core</span> from The Geysers Scientific Corehole, SB-15D</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Roberts, J.J.; Bonner, B.P.; Duba, A.G.; Schneberk, D.L.</p> <p>1996-01-01</p> <p>X-ray attenuation, electrical conductivity, and ultra-sonic velocity are reported for a segment of preserved <span class="hlt">core</span> from SB-15D, 918 ft. X- ray tomography and ultrasonic measurements change as the <span class="hlt">core</span> dries, providing information regarding handling and disturbance of the <span class="hlt">core</span>. Electrical conductivity measurements at reservoir conditions indicate that pore <span class="hlt">fluid</span> properties and pore microstructure control bulk conductivity. These data are useful for calibration and interpretation of field geophysical measurements.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=19910070176&hterms=Nuclear+reactors&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3DNuclear%2Breactors','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=19910070176&hterms=Nuclear+reactors&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3DNuclear%2Breactors"><span>Ultrahigh temperature vapor <span class="hlt">core</span> reactor-MHD system for space nuclear electric power</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Maya, Isaac; Anghaie, Samim; Diaz, Nils J.; Dugan, Edward T.</p> <p>1991-01-01</p> <p>The conceptual design of a nuclear space power system based on the ultrahigh temperature vapor <span class="hlt">core</span> reactor with MHD energy conversion is presented. This UF4 fueled gas <span class="hlt">core</span> cavity reactor operates at 4000 K maximum <span class="hlt">core</span> temperature and 40 atm. Materials experiments, conducted with UF4 up to 2200 K, demonstrate acceptable compatibility with tungsten-molybdenum-, and carbon-based materials. The supporting nuclear, heat transfer, <span class="hlt">fluid</span> flow and MHD analysis, and fissioning plasma physics experiments are also discussed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1981EOSTr..62..577.','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1981EOSTr..62..577."><span>Earth's <span class="hlt">core</span> iron</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p></p> <p></p> <p>Geophysicist J. Michael Brown of Texas A & M University noted recently at the Spring AGU Meeting in Baltimore that the structure and phase of metallic iron at pressures of the earth's inner <span class="hlt">core</span> (approximately 3.3 Mbar) could have great significance in defining geometrical aspects of the <span class="hlt">core</span> itself. Brown worked at the Los Alamos Scientific Laboratory with R.B. McQueen to redetermine the phase relations of metallic iron in a series of new shock-wave experiments. They found the melting point of iron at conditions equal to those at the boundary of the earth's outer (liquid) and inner (solid) <span class="hlt">cores</span> to be 6000°±500°C (Geophysical Research Letters, 7, 533-536, 1980).</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=PIA00947&hterms=inner+core&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3Dinner%2Bcore','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=PIA00947&hterms=inner+core&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3Dinner%2Bcore"><span>Mars' Inner <span class="hlt">Core</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p></p> <p>1997-01-01</p> <p>This figure shows a cross-section of the planet Mars revealing an inner, high density <span class="hlt">core</span> buried deep within the interior. Dipole magnetic field lines are drawn in blue, showing the global scale magnetic field that one associates with dynamo generation in the <span class="hlt">core</span>. Mars must have one day had such a field, but today it is not evident. Perhaps the energy source that powered the early dynamo has shut down. The differentiation of the planet interior - heavy elements like iron sinking towards the center of the planet - can provide energy as can the formation of a solid <span class="hlt">core</span> from the liquid.<p/>The Jet Propulsion Laboratory's Mars Surveyor Operations Project operates the Mars Global Surveyor spacecraft with its industrial partner, Lockheed Martin Astronautics, from facilities in Pasadena, CA and Denver, CO. JPL is an operating division of California Institute of Technology (Caltech).</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/862579','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/862579"><span>Molten <span class="hlt">core</span> retention assembly</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Lampe, Robert F.</p> <p>1976-06-22</p> <p>Molten fuel produced in a <span class="hlt">core</span> overheating accident is caught by a molten <span class="hlt">core</span> retention assembly consisting of a horizontal baffle plate having a plurality of openings therein, heat exchange tubes having flow holes near the top thereof mounted in the openings, and a cylindrical, imperforate baffle attached to the plate and surrounding the tubes. The baffle assembly is supported from the <span class="hlt">core</span> support plate of the reactor by a plurality of hanger rods which are welded to radial beams passing under the baffle plate and intermittently welded thereto. Preferably the upper end of the cylindrical baffle terminates in an outwardly facing lip to which are welded a plurality of bearings having slots therein adapted to accept the hanger rods.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19660000521','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19660000521"><span>Hydraulic <span class="hlt">fluid</span> serves as mandrel for small diameter refractory tube drawing</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Mayfield, R. M.</p> <p>1966-01-01</p> <p>Sealing hydraulic <span class="hlt">fluid</span> within a tube and passing the tube through a reducing die produces high quality small diameter refractory metal tubing. The encased <span class="hlt">fluid</span> eliminates the need for mandrel or ductile <span class="hlt">core</span> removal and drawing can proceed with less handling operations.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/4840759','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/biblio/4840759"><span><span class="hlt">CORE</span> SATURATION BLOCKING OSCILLATOR</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Spinrad, R.J.</p> <p>1961-10-17</p> <p>A blocking oscillator which relies on <span class="hlt">core</span> saturation regulation to control the output pulse width is described. In this arrangement an external magnetic loop is provided in which a saturable portion forms the <span class="hlt">core</span> of a feedback transformer used with the thermionic or semi-conductor active element. A first stationary magnetic loop establishes a level of flux through the saturation portion of the loop. A second adjustable magnet moves the flux level to select a saturation point giving the desired output pulse width. (AEC)</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li class="active"><span>22</span></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_22 --> <div id="page_23" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li class="active"><span>23</span></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li><a href="#" onclick='return showDiv("page_25");'>25</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="441"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19930018672','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19930018672"><span><span class="hlt">Fluid</span> management system technology discipline</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Symons, E. Patrick</p> <p>1990-01-01</p> <p>Viewgraphs on <span class="hlt">fluid</span> management system technology discipline for Space Station Freedom are presented. Topics covered include: subcritical cryogenic storage and transfer; <span class="hlt">fluid</span> handling; and components and instrumentation.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://medlineplus.gov/ency/article/003769.htm','NIH-MEDLINEPLUS'); return false;" href="https://medlineplus.gov/ency/article/003769.htm"><span>Cerebrospinal <span class="hlt">fluid</span> culture</span></a></p> <p><a target="_blank" href="http://medlineplus.gov/">MedlinePlus</a></p> <p></p> <p></p> <p>... Alternative Names Culture - CSF; Spinal <span class="hlt">fluid</span> culture; CSF ... In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods . 23d ed. Philadelphia, PA: Elsevier; ...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://labtestsonline.org/understanding/analytes/synovial/tab/test','NIH-MEDLINEPLUS'); return false;" href="https://labtestsonline.org/understanding/analytes/synovial/tab/test"><span>Synovial <span class="hlt">Fluid</span> Analysis</span></a></p> <p><a target="_blank" href="http://medlineplus.gov/">MedlinePlus</a></p> <p></p> <p></p> <p>... <span class="hlt">Fluid</span> Analysis Related tests: Glucose Tests , Uric Acid , Gram Stain , Susceptibility Testing , White Blood Cell Count , Red Blood ... to look for microbes if infection is suspected. Gram stain allows for the direct observation of bacteria or ...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=unit+AND+operations&pg=7&id=EJ235178','ERIC'); return false;" href="https://eric.ed.gov/?q=unit+AND+operations&pg=7&id=EJ235178"><span>Polymer <span class="hlt">Fluid</span> Dynamics.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Bird, R. Byron</p> <p>1980-01-01</p> <p>Problems in polymer <span class="hlt">fluid</span> dynamics are described, including development of constitutive equations, rheometry, kinetic theory, flow visualization, heat transfer studies, flows with phase change, two-phase flow, polymer unit operations, and drag reduction. (JN)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/880690','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/880690"><span><span class="hlt">Fluid</span> pumping apparatus</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>West, Phillip B.</p> <p>2006-01-17</p> <p>A method and apparatus suitable for coupling seismic or other downhole sensors to a borehole wall in high temperature and pressure environments. In one embodiment, one or more metal bellows mounted to a sensor module are inflated to clamp the sensor module within the borehole and couple an associated seismic sensor to a borehole wall. Once the sensing operation is complete, the bellows are deflated and the sensor module is unclamped by deflation of the metal bellows. In a further embodiment, a magnetic drive pump in a pump module is used to supply <span class="hlt">fluid</span> pressure for inflating the metal bellows using borehole <span class="hlt">fluid</span> or <span class="hlt">fluid</span> from a reservoir. The pump includes a magnetic drive motor configured with a rotor assembly to be exposed to borehole <span class="hlt">fluid</span> pressure including a rotatable armature for driving an impeller and an associated coil under control of electronics isolated from borehole pressure.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://medlineplus.gov/fluidandelectrolytebalance.html','NIH-MEDLINEPLUS'); return false;" href="https://medlineplus.gov/fluidandelectrolytebalance.html"><span><span class="hlt">Fluid</span> and Electrolyte Balance</span></a></p> <p><a target="_blank" href="http://medlineplus.gov/">MedlinePlus</a></p> <p></p> <p></p> <p>... right balance of electrolytes helps your body's blood chemistry, muscle action and other processes. Sodium, calcium, potassium, chlorine, phosphate and magnesium are all electrolytes. You get them from the foods you eat and the <span class="hlt">fluids</span> you drink. Levels ...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.youtube.com/watch?v=4OFLx4dgGNs','SCIGOVIMAGE-NASA'); return false;" href="http://www.youtube.com/watch?v=4OFLx4dgGNs"><span>Our World: <span class="hlt">Fluid</span> Shift</span></a></p> <p><a target="_blank" href="https://images.nasa.gov/">NASA Image and Video Library</a></p> <p></p> <p></p> <p>Learn about the circulatory system and how gravity aids blood flow in our bodies here on Earth. Find out how NASA flight surgeons help the astronauts deal with the <span class="hlt">fluid</span> shift that happens during s...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/EJ235178.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/EJ235178.pdf"><span>Polymer <span class="hlt">Fluid</span> Dynamics.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Bird, R. Byron</p> <p>1980-01-01</p> <p>Problems in polymer <span class="hlt">fluid</span> dynamics are described, including development of constitutive equations, rheometry, kinetic theory, flow visualization, heat transfer studies, flows with phase change, two-phase flow, polymer unit operations, and drag reduction. (JN)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19860016002','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19860016002"><span>Improved perfluoroalkylether <span class="hlt">fluid</span> development</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Jones, W. R., Jr.; Paciorek, K.; Nakahara, J.; Smythe, M.; Kratzer, R.</p> <p>1986-01-01</p> <p>The feasibility of transforming a commercial linear perfluoroalkylether <span class="hlt">fluid</span> into a material stable in the presence of metals and metal alloys in oxidizing atmospheres at 300 C without the loss of the desirable viscosity temperature characteristics was determined. The approach consisted of thermal oxidative treatment in the presence of catalyst to remove weak links, followed by transformation of the created functional groups into phospha-s-triazine linkages. It it found that the experimental material obtained in 66% yield from the commercial <span class="hlt">fluid</span> exhibits, over an 8 hr period at 300 C in the presence of Ti(4Al, 4Mn) alloy, thermal oxidative stability better by a factor of 2.6x1000 based on volatiles evolved than the commercial product. The viscosity and molecular weight of the developed <span class="hlt">fluid</span> are unchanged and are essentially identical with the commercial material. No metal corrosion occurs with the experimental <span class="hlt">fluid</span> at 300 C.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://images.nasa.gov/#/details-iss020e018121.html','SCIGOVIMAGE-NASA'); return false;" href="https://images.nasa.gov/#/details-iss020e018121.html"><span>FSS (<span class="hlt">Fluid</span> Servicing System)</span></a></p> <p><a target="_blank" href="https://images.nasa.gov/">NASA Image and Video Library</a></p> <p></p> <p>2009-07-08</p> <p>ISS020-E-018121 (8 July 2009) --- European Space Agency astronaut Frank De Winne, Expedition 20 flight engineer, works with the <span class="hlt">Fluid</span> Servicing System (FSS) in the Columbus laboratory of the International Space Station.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://images.nasa.gov/#/details-iss020e018118.html','SCIGOVIMAGE-NASA'); return false;" href="https://images.nasa.gov/#/details-iss020e018118.html"><span>FSS (<span class="hlt">Fluid</span> Servicing System)</span></a></p> <p><a target="_blank" href="https://images.nasa.gov/">NASA Image and Video Library</a></p> <p></p> <p>2009-07-08</p> <p>ISS020-E-018118 (8 July 2009) --- European Space Agency astronaut Frank De Winne, Expedition 20 flight engineer, works with the <span class="hlt">Fluid</span> Servicing System (FSS) in the Columbus laboratory of the International Space Station.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/6005050','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/6005050"><span>Well servicing <span class="hlt">fluid</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Liao, A.</p> <p>1991-07-02</p> <p>This patent describes a well servicing <span class="hlt">fluid</span>. It comprises an aqueous medium from about 0.2 to about 5 pounds per barrel of a partially hydrolyzed homopolymer of acrylamide having an average molecular weight greater than 1 million, and a calcium-controlling additive. It comprises from about 0.1 to about 2.5 pounds per barrel of the <span class="hlt">fluid</span> of an alkali metal bicarbonate, from about 0.1 to about 2.5 pounds per barrel of the <span class="hlt">fluid</span> of a water-soluble, carboxylic acid, and from about 0.1 to about 1.5 pounds per barrel of the <span class="hlt">fluid</span> of a terpolymer containing from about 40 to about 70% by weight acrylamide, from about 20 to about 40% by weight of an acrylic acid and from about 5 to about 20% by weight of 2-acrylamido-2-methylpropanesulfonic acid, the terpolymer having an average molecular weight of from about 5 to about 10 million.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/868631','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/868631"><span>Basic <span class="hlt">fluid</span> system trainer</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Semans, Joseph P.; Johnson, Peter G.; LeBoeuf, Jr., Robert F.; Kromka, Joseph A.; Goron, Ronald H.; Hay, George D.</p> <p>1993-01-01</p> <p>A trainer, mounted and housed within a mobile console, is used to teach and reinforce <span class="hlt">fluid</span> principles to students. The system trainer has two centrifugal pumps, each driven by a corresponding two-speed electric motor. The motors are controlled by motor controllers for operating the pumps to circulate the <span class="hlt">fluid</span> stored within a supply tank through a closed system. The pumps may be connected in series or in parallel. A number of valves are also included within the system to effect different flow paths for the <span class="hlt">fluid</span>. In addition, temperature and pressure sensing instruments are installed throughout the closed system for measuring the characteristics of the <span class="hlt">fluid</span>, as it passes through the different valves and pumps. These measurements are indicated on a front panel mounted to the console, as a teaching aid, to allow the students to observe the characteristics of the system.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/10146999','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/10146999"><span>Basic <span class="hlt">fluid</span> system trainer</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Semans, J.P.; Johnson, P.G.; LeBoeuf, R.F. Jr.; Kromka, J.A.; Goron, R.H.; Hay, G.D.</p> <p>1991-04-30</p> <p>This invention, a trainer mounted and housed within a mobile console, is used to teach and reinforce <span class="hlt">fluid</span> principles to students. The system trainer has two centrifugal pumps, each driven by a corresponding two-speed electric motor. The motors are controlled by motor controllers for operating the pumps to circulate the <span class="hlt">fluid</span> stored within a supply tank through a closed system. The pumps may be connected in series or in parallel. A number of valves are also included within the system to effect different flow paths for the <span class="hlt">fluid</span>. In addition, temperature and pressure sensing instruments are installed throughout the closed system for measuring the characteristics of the <span class="hlt">fluid</span>, as it passes through the different valves and pumps. These measurements are indicated on a front panel mounted to the console, as a teaching aid, to allow the students to observe the characteristics of the system.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20040110815','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20040110815"><span>Sound Transmission through a Cylindrical Sandwich Shell with Honeycomb <span class="hlt">Core</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Tang, Yvette Y.; Robinson, Jay H.; Silcox, Richard J.</p> <p>1996-01-01</p> <p>Sound transmission through an infinite cylindrical sandwich shell is studied in the context of the transmission of airborne sound into aircraft interiors. The cylindrical shell is immersed in <span class="hlt">fluid</span> media and excited by an oblique incident plane sound wave. The internal and external <span class="hlt">fluids</span> are different and there is uniform airflow in the external <span class="hlt">fluid</span> medium. An explicit expression of transmission loss is derived in terms of modal impedance of the <span class="hlt">fluids</span> and the shell. The results show the effects of (a) the incident angles of the plane wave; (b) the flight conditions of Mach number and altitude of the aircraft; (c) the ratios between the <span class="hlt">core</span> thickness and the total thickness of the shell; and (d) the structural loss factors on the transmission loss. Comparisons of the transmission loss are made among different shell constructions and different shell theories.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015EGUGA..17..319R','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015EGUGA..17..319R"><span><span class="hlt">Fluid</span> flow along faults in carbonate rocks</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Romano, Valentina; Battaglia, Maurizio; Bigi, Sabina</p> <p>2015-04-01</p> <p>The study of <span class="hlt">fluid</span> flow in fractured rocks plays a key role in reservoir management, including CO2 sequestration and waste isolation. We present a mathematical model of <span class="hlt">fluid</span> flow in a fault zone, based on field data acquired in Majella Mountain, in the Central Apennines (Italy). The Majella is a thrust related, asymmetric, box shaped anticline. The mountain carbonate outcrops are part of a lower Cretaceous-Miocene succession, covered by a siliciclastic sequence of lower Pliocene age. We study a fault zone located in the Bolognano Formation (Oligo-Miocene age) and exposed in the Roman Valley Quarry near the town of Lettomanoppello, in the northern sector of the Majella Mountain. This is one of the best places in the Apennines to investigate a fault zone and has been the subject of numerous field studies. Faults are mechanical and permeability heterogeneities in the upper crust, so they strongly influence <span class="hlt">fluid</span> flow. The distribution of the main components (<span class="hlt">core</span>, damage zone) can lead a fault zone to act as a conduit, a barrier or a combined conduit-barrier system. We integrated existing and our own structural surveys of the area to better identify the major fault features (e.g., kind of fractures, statistical properties, geometry and pertrophysical characteristics). Our analytical model describe the Bolognano Formation using a dual porosity/dual permeability model: global flow occurs through the fracture network only, while rock matrix contain the majority of <span class="hlt">fluid</span> storage and provide <span class="hlt">fluid</span> drainage to the fractures. Pressure behavior is analyzed by examining the pressure drawdown curves, the derivative plots and the effects of the characteristic parameters. The analytical model has been calibrated against published data on <span class="hlt">fluid</span> flow and pressure distribution in the Bolognano Formation.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/873698','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/873698"><span>Valve for <span class="hlt">fluid</span> control</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Oborny, Michael C.; Paul, Phillip H.; Hencken, Kenneth R.; Frye-Mason, Gregory C.; Manginell, Ronald P.</p> <p>2001-01-01</p> <p>A valve for controlling <span class="hlt">fluid</span> flows. This valve, which includes both an actuation device and a valve body provides: the ability to incorporate both the actuation device and valve into a unitary structure that can be placed onto a microchip, the ability to generate higher actuation pressures and thus control higher <span class="hlt">fluid</span> pressures than conventional microvalves, and a device that draws only microwatts of power. An electrokinetic pump that converts electric potential to hydraulic force is used to operate, or actuate, the valve.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/6402837','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/6402837"><span>Drilling <span class="hlt">fluid</span> disposal</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Nesbitt, L.E.; Sander, J.A.</p> <p>1981-01-01</p> <p>This paper attempts to review the effect of the regulatory process on the selection and handling of drilling <span class="hlt">fluids</span> for proper disposal. It is shown that a maze of regulations and regulatory agencies coupled with uncertainty in interpretation of environmental data and an evolving system of disposal engineering will require industry action to monitor the area and derive a solid engineering basis for disposal of spent drilling <span class="hlt">fluid</span>. 16 refs.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19750007832','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19750007832"><span><span class="hlt">Fluid</span> infusion system</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p></p> <p>1974-01-01</p> <p>Performance testing carried out in the development of the prototype zero-g <span class="hlt">fluid</span> infusion system is described and summarized. Engineering tests were performed in the course of development, both on the original breadboard device and on the prototype system. This testing was aimed at establishing baseline system performance parameters and facilitating improvements. Acceptance testing was then performed on the prototype system to verify functional performance. Acceptance testing included a demonstration of the <span class="hlt">fluid</span> infusion system on a laboratory animal.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24467958','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24467958"><span>[Diagnosis: synovial <span class="hlt">fluid</span> analysis].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Gallo Vallejo, Francisco Javier; Giner Ruiz, Vicente</p> <p>2014-01-01</p> <p>Synovial <span class="hlt">fluid</span> analysis in rheumatological diseases allows a more accurate diagnosis in some entities, mainly infectious and microcrystalline arthritis. Examination of synovial <span class="hlt">fluid</span> in patients with osteoarthritis is useful if a differential diagnosis will be performed with other processes and to distinguish between inflammatory and non-inflammatory forms. Joint aspiration is a diagnostic and sometimes therapeutic procedure that is available to primary care physicians. Copyright © 2014 Elsevier España, S.L. All rights reserved.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li class="active"><span>23</span></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li><a href="#" onclick='return showDiv("page_25");'>25</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_23 --> <div id="page_24" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li class="active"><span>24</span></li> <li><a href="#" onclick='return showDiv("page_25");'>25</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="461"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19760025415','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19760025415"><span><span class="hlt">Fluid</span> property measurements study</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Devaney, W. E.</p> <p>1976-01-01</p> <p><span class="hlt">Fluid</span> properties of refrigerant-21 were investigated at temperatures from the freezing point to 423 Kelvin and at pressures to 1.38 x 10 to the 8th power N/sq m (20,000 psia). The <span class="hlt">fluid</span> properties included were: density, vapor pressure, viscosity, specific heat, thermal conductivity, thermal expansion coefficient, freezing point and bulk modulus. Tables of smooth values are reported.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28802478','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28802478"><span>Dynamics of network <span class="hlt">fluids</span>.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Dias, C S; Araújo, N A M; Telo da Gama, M M</p> <p>2017-07-06</p> <p>Network <span class="hlt">fluids</span> are structured <span class="hlt">fluids</span> consisting of chains and branches. They are characterized by unusual physical properties, such as, exotic bulk phase diagrams, interfacial roughening and wetting transitions, and equilibrium and nonequilibrium gels. Here, we provide an overview of a selection of their equilibrium and dynamical properties. Recent research efforts towards bridging equilibrium and non-equilibrium studies are discussed, as well as several open questions. Copyright © 2017 Elsevier B.V. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/9597718','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/9597718"><span><span class="hlt">Fluid</span> therapy in shock.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Mandell, D C; King, L G</p> <p>1998-05-01</p> <p>The goal of treatment for all types of shock is the improvement of tissue perfusion and oxygenation. The mainstay of therapy for hypovolemic and septic shock is the expansion of the intravascular volume by <span class="hlt">fluid</span> administration, including crystalloids, colloids, and blood products. Frequent physical examinations and monitoring enable the clinician to determine the adequacy of tissue oxygenation and thus the success of the <span class="hlt">fluid</span> therapy.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/270485','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/270485"><span>A novel enzyme-based acidizing system: Matrix acidizing and drilling <span class="hlt">fluid</span> damage removal</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Harris, R.E.; McKay, D.M.; Moses, V.</p> <p>1995-12-31</p> <p>A novel acidizing process is used to increase the permeability of carbonate rock <span class="hlt">cores</span> in the laboratory and to remove drilling <span class="hlt">fluid</span> damage from <span class="hlt">cores</span> and wafers. Field results show the benefits of the technology as applied both to injector and producer wells.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/505162','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/505162"><span>Paleotemperatures preserved in <span class="hlt">fluid</span> inclusions in halite</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Roberts, S.M.; Spencer, R.J.</p> <p>1995-10-01</p> <p>A variety of paleoclimate proxy records allow determination of relative warming or cooling. However, if we are to understand climate change, quantification of past temperature fluctuations is essential. Our research indicates that <span class="hlt">fluid</span> inclusions in halite can yield homogenization temperatures that record surface brine temperatures at the time of halite precipitation. To avoid problems with stretching, leaking, and initial trapping of air, samples with primary, single-phase (liquid) <span class="hlt">fluid</span> inclusions are chilled in a freezer to nucleate vapor bubbles. We tested the reliability of this method of obtaining <span class="hlt">fluid</span>-inclusion homogenization temperatures using modern salts precipitated at Badwater Basin, Death Valley, California. Homogenization temperatures correlate well with measured brine temperatures. The same method is applied to <span class="hlt">fluid</span> inclusions in Pleistocene halite from a <span class="hlt">core</span> taken at the same location in Death Valley. Results are at several scales, recording diurnal temperature variations, seasonal temperature fluctuations, and longer-term warming and cooling events that correlate with major changes in the sedimentary environment related to climate. This technique is uniquely instrumental for paleoclimate studies because it offers actual, not just proxy, paleotemperature data. 27 refs., 17 figs.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/1036316','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/1036316"><span>Chemical Convention in the Lunar <span class="hlt">Core</span> from Melting Experiments on the Ironsulfur System</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Li, J.; Liu, J.; Chen, B.; Li, Z.; Wang, Y.</p> <p>2012-03-26</p> <p>By reanalyzing Apollo lunar seismograms using array-processing methods, a recent study suggests that the Moon has a solid inner <span class="hlt">core</span> and a <span class="hlt">fluid</span> outer <span class="hlt">core</span>, much like the Earth. The volume fraction of the lunar inner <span class="hlt">core</span> is 38%, compared with 4% for the Earth. The pressure at the Moon's <span class="hlt">core</span>-mantle boundary is 4.8 GPa, and that at the ICB is 5.2 GPa. The partially molten state of the lunar <span class="hlt">core</span> provides constraints on the thermal and chemical states of the Moon: The temperature at the inner <span class="hlt">core</span> boundary (ICB) corresponds to the liquidus of the outer <span class="hlt">core</span> composition, and the mass fraction of the solid <span class="hlt">core</span> allows us to infer the bulk composition of the <span class="hlt">core</span> from an estimated thermal profile. Moreover, knowledge on the extent of <span class="hlt">core</span> solidification can be used to evaluate the role of chemical convection in the origin of early lunar <span class="hlt">core</span> dynamo. Sulfur is considered an antifreeze component in the lunar <span class="hlt">core</span>. Here we investigate the melting behavior of the Fe-S system at the pressure conditions of the lunar <span class="hlt">core</span>, using the multi-anvil apparatus and synchrotron and laboratory-based analytical methods. Our goal is to understand compositionally driven convection in the lunar <span class="hlt">core</span> and assess its role in generating an internal magnetic field in the early history of the Moon.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2169338','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2169338"><span>The Tom <span class="hlt">Core</span> Complex</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Ahting, Uwe; Thun, Clemens; Hegerl, Reiner; Typke, Dieter; Nargang, Frank E.; Neupert, Walter; Nussberger, Stephan</p> <p>1999-01-01</p> <p>Translocation of nuclear-encoded preproteins across the outer membrane of mitochondria is mediated by the multicomponent transmembrane TOM complex. We have isolated the TOM <span class="hlt">core</span> complex of Neurospora crassa by removing the receptors Tom70 and Tom20 from the isolated TOM holo complex by treatment with the detergent dodecyl maltoside. It consists of Tom40, Tom22, and the small Tom components, Tom6 and Tom7. This <span class="hlt">core</span> complex was also purified directly from mitochondria after solubilization with dodecyl maltoside. The TOM <span class="hlt">core</span> complex has the characteristics of the general insertion pore; it contains high-conductance channels and binds preprotein in a targeting sequence-dependent manner. It forms a double ring structure that, in contrast to the holo complex, lacks the third density seen in the latter particles. Three-dimensional reconstruction by electron tomography exhibits two open pores traversing the complex with a diameter of ∼2.1 nm and a height of ∼7 nm. Tom40 is the key structural element of the TOM <span class="hlt">core</span> complex. PMID:10579717</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/6998897','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/6998897"><span>Theory of <span class="hlt">core</span> excitons</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Dow, J. D.; Hjalmarson, H. P.; Sankey, O. F.; Allen, R. E.; Buettner, H.</p> <p>1980-01-01</p> <p>The observation of <span class="hlt">core</span> excitons with binding energies much larger than those of the valence excitons in the same material has posed a long-standing theoretical problem. A proposed solution to this problem is presented, and Frenkel excitons and Wannier excitons are shown to coexist naturally in a single material. (GHT)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017APS..APRM14003M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017APS..APRM14003M"><span>Modeling <span class="hlt">Core</span> Collapse Supernovae</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Mezzacappa, Anthony</p> <p>2017-01-01</p> <p><span class="hlt">Core</span> collapse supernovae, or the death throes of massive stars, are general relativistic, neutrino-magneto-hydrodynamic events. The <span class="hlt">core</span> collapse supernova mechanism is still not in hand, though key components have been illuminated, and the potential for multiple mechanisms for different progenitors exists. <span class="hlt">Core</span> collapse supernovae are the single most important source of elements in the Universe, and serve other critical roles in galactic chemical and thermal evolution, the birth of neutron stars, pulsars, and stellar mass black holes, the production of a subclass of gamma-ray bursts, and as potential cosmic laboratories for fundamental nuclear and particle physics. Given this, the so called ``supernova problem'' is one of the most important unsolved problems in astrophysics. It has been fifty years since the first numerical simulations of <span class="hlt">core</span> collapse supernovae were performed. Progress in the past decade, and especially within the past five years, has been exponential, yet much work remains. Spherically symmetric simulations over nearly four decades laid the foundation for this progress. Two-dimensional modeling that assumes axial symmetry is maturing. And three-dimensional modeling, while in its infancy, has begun in earnest. I will present some of the recent work from the ``Oak Ridge'' group, and will discuss this work in the context of the broader work by other researchers in the field. I will then point to future requirements and challenges. Connections with other experimental, observational, and theoretical efforts will be discussed, as well.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/4153568','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/biblio/4153568"><span>NUCLEAR REACTOR <span class="hlt">CORE</span> DESIGN</span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Mahlmeister, J.E.; Peck, W.S.; Haberer, W.V.; Williams, A.C.</p> <p>1960-03-22</p> <p>An improved <span class="hlt">core</span> design for a sodium-cooled, graphitemoderated nuclear reactor is described. The improved reactor <span class="hlt">core</span> comprises a number of blocks of moderator material, each block being in the shape of a regular prism. A number of channels, extending the length of each block, are disposed around the periphery. When several blocks are placed in contact to form the reactor <span class="hlt">core</span>, the channels in adjacent blocks correspond with each other to form closed conduits extending the length of the <span class="hlt">core</span>. Fuel element clusters are disposed in these closed conduits, and liquid coolant is forced through the annulus between the fuel cluster and the inner surface of the conduit. In a preferred embodiment of the invention, the moderator blocks are in the form of hexagonal prisms with longitudinal channels cut into the corners of the hexagon. The main advantage of an "edge-loaded" moderator block is that fewer thermal neutrons are absorbed by the moderator cladding, as compared with a conventional centrally loaded moderator block.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=MSFC-9807369&hterms=dna+replication&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D40%26Ntt%3Ddna%2Breplication','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=MSFC-9807369&hterms=dna+replication&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D40%26Ntt%3Ddna%2Breplication"><span>Nucleosome <span class="hlt">Core</span> Particle</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p></p> <p>1997-01-01</p> <p>Nucleosome <span class="hlt">Core</span> Particle grown on STS-81. The fundamental structural unit of chromatin and is the basis for organization within the genome by compaction of DNA within the nucleus of the cell and by making selected regions of chromosomes available for transcription and replication. Principal Investigator's are Dr. Dan Carter and Dr. Gerard Bunick of New Century Pharmaceuticals.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/EJ971416.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/EJ971416.pdf"><span>Authentic to the <span class="hlt">Core</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Kukral, Nicole; Spector, Stacy</p> <p>2012-01-01</p> <p>When educators think about what makes learning relevant to students, often they narrow their thinking to electives or career technical education. While these provide powerful opportunities for students to make relevant connections to their learning, they can also create authentic experiences in the <span class="hlt">core</span> curriculum. In the San Juan Unified School…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED021419.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED021419.pdf"><span>University City <span class="hlt">Core</span> Plan.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Philadelphia City Planning Commission, PA.</p> <p></p> <p>A redevelopment plan for an urban <span class="hlt">core</span> area of about 300 acres was warranted by--(1) unsuitable building conditions, (2) undesirable land usage, and (3) faulty traffic circulation. The plan includes expansion of two universities and creation of a regional science center, high school, and medical center. Guidelines for proposed land use and zoning…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=Chomsky%2c+AND+Noam&id=EJ1050156','ERIC'); return false;" href="https://eric.ed.gov/?q=Chomsky%2c+AND+Noam&id=EJ1050156"><span>Some <span class="hlt">Core</span> Contested Concepts</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Chomsky, Noam</p> <p>2015-01-01</p> <p><span class="hlt">Core</span> concepts of language are highly contested. In some cases this is legitimate: real empirical and conceptual issues arise. In other cases, it seems that controversies are based on misunderstanding. A number of crucial cases are reviewed, and an approach to language is outlined that appears to have strong conceptual and empirical motivation, and…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=moral+AND+duty&id=EJ1033725','ERIC'); return false;" href="https://eric.ed.gov/?q=moral+AND+duty&id=EJ1033725"><span>Navagating the Common <span class="hlt">Core</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>McShane, Michael Q.</p> <p>2014-01-01</p> <p>This article presents a debate over the Common <span class="hlt">Core</span> State Standards Initiative as it has rocketed to the forefront of education policy discussions around the country. The author contends that there is value in having clear cross state standards that will clarify the new online and blended learning that the growing use of technology has provided…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Chomsky%2c+AND+Noam&id=EJ1050156','ERIC'); return false;" href="http://eric.ed.gov/?q=Chomsky%2c+AND+Noam&id=EJ1050156"><span>Some <span class="hlt">Core</span> Contested Concepts</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Chomsky, Noam</p> <p>2015-01-01</p> <p><span class="hlt">Core</span> concepts of language are highly contested. In some cases this is legitimate: real empirical and conceptual issues arise. In other cases, it seems that controversies are based on misunderstanding. A number of crucial cases are reviewed, and an approach to language is outlined that appears to have strong conceptual and empirical motivation, and…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017EPJWC.14517001S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017EPJWC.14517001S"><span>Investigation of EAS <span class="hlt">cores</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Shaulov, S. B.; Beyl, P. F.; Beysembaev, R. U.; Beysembaeva, E. A.; Bezshapov, S. P.; Borisov, A. S.; Cherdyntceva, K. V.; Chernyavsky, M. M.; Chubenko, A. P.; Dalkarov, O. D.; Denisova, V. G.; Erlykin, A. D.; Kabanova, N. V.; Kanevskaya, E. A.; Kotelnikov, K. A.; Morozov, A. E.; Mukhamedshin, R. A.; Nam, R. A.; Nesterova, N. M.; Nikolskaya, N. M.; Pavluchenko, V. P.; Piskal, V. V.; Puchkov, V. S.; Pyatovsky, S. E.; Ryabov, V. A.; Sadykov, T. Kh.; Schepetov, A. L.; Smirnova, M. D.; Stepanov, A. V.; Uryson, A. V.; Vavilov, Yu. N.; Vildanov, N. G.; Vildanova, L. I.; Zayarnaya, I. S.; Zhanceitova, J. K.; Zhukov, V. V.</p> <p>2017-06-01</p> <p>The development of nuclear-electromagnetic cascade models in air in the late forties have shown informational content of the study of <span class="hlt">cores</span> of extensive air showers (EAS). These investigations were the main goal in different experiments which were carried out over many years by a variety of methods. Outcomes of such investigations obtained in the HADRON experiment using an X-ray emulsion chamber (XREC) as a <span class="hlt">core</span> detector are considered. The Ne spectrum of EAS associated with γ-ray families, spectra of γ-rays (hadrons) in EAS <span class="hlt">cores</span> and the Ne dependence of the muon number, ⟨Nμ⟩, in EAS with γ-ray families are obtained for the first time at energies of 1015-1017 eV with this method. A number of new effects were observed, namely, an abnormal scaling violation in hadron spectra which are fundamentally different from model predictions, an excess of muon number in EAS associated with γ-ray families, and the penetrating component in EAS <span class="hlt">cores</span>. It is supposed that the abnormal behavior of γ-ray spectra and Ne dependence of the muon number are explained by the emergence of a penetrating component in the 1st PCR spectrum `knee' range. Nuclear and astrophysical explanations of the origin of the penetrating component are discussed. The necessity of considering the contribution of a single close cosmic-ray source to explain the PCR spectrum in the knee range is noted.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20000057285','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20000057285"><span>Ultrasonic Drilling and <span class="hlt">Coring</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Bar-Cohen, Yoseph</p> <p>1998-01-01</p> <p>A novel drilling and <span class="hlt">coring</span> device, driven by a combination, of sonic and ultrasonic vibration, was developed. The device is applicable to soft and hard objects using low axial load and potentially operational under extreme conditions. The device has numerous potential planetary applications. Significant potential for commercialization in construction, demining, drilling and medical technologies.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=creativity+AND+innovative&pg=6&id=EJ1006691','ERIC'); return false;" href="https://eric.ed.gov/?q=creativity+AND+innovative&pg=6&id=EJ1006691"><span>The Uncommon <span class="hlt">Core</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Ohler, Jason</p> <p>2013-01-01</p> <p>This author contends that the United States neglects creativity in its education system. To see this, he states, one may look at the Common <span class="hlt">Core</span> State Standards. If one searches the English Language Arts and Literacy standards for the words "creative," "innovative," and "original"--and any associated terms, one will…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Unit+AND+e%2fm&id=ED201471','ERIC'); return false;" href="http://eric.ed.gov/?q=Unit+AND+e%2fm&id=ED201471"><span><span class="hlt">Core</span> Geometry Manual.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Hirata, Li Ann</p> <p></p> <p><span class="hlt">Core</span> Geometry is a course offered in the Option Y sequence of the high school mathematics program described by the Hawaii State Department of Education's guidelines. The emphasis of this course is on the general awareness and use of the relationships among points, lines, and figures in planes and space. This sample course is based on the…</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li class="active"><span>24</span></li> <li><a href="#" onclick='return showDiv("page_25");'>25</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_24 --> <div id="page_25" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li class="active"><span>25</span></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="481"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=core+AND+value&id=EJ920230','ERIC'); return false;" href="https://eric.ed.gov/?q=core+AND+value&id=EJ920230"><span>Looking for <span class="hlt">Core</span> Values</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Carter, Margie</p> <p>2010-01-01</p> <p>People who view themselves as leaders, not just managers or teachers, are innovators who focus on clarifying <span class="hlt">core</span> values and aligning all aspects of the organization with these values to grow their vision. A vision for an organization can't be just one person's idea. Visions grow by involving people in activities that help them name and create…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2010EGUGA..12..353D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2010EGUGA..12..353D"><span>Life from the <span class="hlt">core</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Doglioni, Carlo; Coleman, Max; Pignatti, Johannes; Glassmeier, Karl-Heinz</p> <p>2010-05-01</p> <p>Life on Earth is the result of the chaotic combination of several independent chemical and physical parameters. One of them is the shield from ionizing radiation exerted by the atmosphere and the Earth's magnetic field. We hypothesise that the first few billion years of the Earth's history, dominated by bacteria, were characterized by stronger ionizing radiation. Bacteria can survive under such conditions better than any other organism. During the Archean and early Proterozoic the shield could have been weaker, allowing the development of only a limited number of species, more resistant to the external radiation. The Cambrian explosion of life could have been enhanced by the gradual growth of the solid inner <span class="hlt">core</span>, which was not existent possibly before 1 Ga. The cooling of the Earth generated the solidification of the iron alloy in the center of the planet. As an hypothesis, before the crystallization of the <span class="hlt">core</span>, the turbulence in the liquid <span class="hlt">core</span> could have resulted in a lower or different magnetic field from the one we know today, being absent the relative rotation between inner and external <span class="hlt">core</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=MSFC-9807370&hterms=Structural+basis+transcription&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D10%26Ntt%3DStructural%2Bbasis%2Btranscription','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=MSFC-9807370&hterms=Structural+basis+transcription&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D10%26Ntt%3DStructural%2Bbasis%2Btranscription"><span>Nucleosome <span class="hlt">Core</span> Particle</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p></p> <p>1997-01-01</p> <p>Nucleosome <span class="hlt">Core</span> Particle grown on STS-81. The fundamental structural unit of chromatin and is the basis for organization within the genome by compaction of DNA within the nucleus of the cell and by making selected regions of chromosomes available for transcription and replication. Principal Investigator's are Dr. Dan Carter and Dr. Gerard Bunick of New Century Pharmaceuticals.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Jefferson%2c+AND+Thomas&id=EJ1033725','ERIC'); return false;" href="http://eric.ed.gov/?q=Jefferson%2c+AND+Thomas&id=EJ1033725"><span>Navagating the Common <span class="hlt">Core</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>McShane, Michael Q.</p> <p>2014-01-01</p> <p>This article presents a debate over the Common <span class="hlt">Core</span> State Standards Initiative as it has rocketed to the forefront of education policy discussions around the country. The author contends that there is value in having clear cross state standards that will clarify the new online and blended learning that the growing use of technology has provided…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=kinesiology+AND+major&pg=3&id=EJ800301','ERIC'); return false;" href="https://eric.ed.gov/?q=kinesiology+AND+major&pg=3&id=EJ800301"><span>Renewing the <span class="hlt">Core</span> Curriculum</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Lawson, Hal A.</p> <p>2007-01-01</p> <p>The <span class="hlt">core</span> curriculum accompanied the development of the academic discipline with multiple names such as Kinesiology, Exercise and Sport Science, and Health and Human Performance. It provides commonalties for undergraduate majors. It is timely to renew this curriculum. Renewal involves strategic reappraisals. It may stimulate change or reaffirm the…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Alloys&pg=3&id=EJ285781','ERIC'); return false;" href="http://eric.ed.gov/?q=Alloys&pg=3&id=EJ285781"><span>The Earth's <span class="hlt">Core</span>.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Jeanloz, Raymond</p> <p>1983-01-01</p> <p>The nature of the earth's <span class="hlt">core</span> is described. Indirect evidence (such as that determined from seismological data) indicates that it is an iron alloy, solid toward its center but otherwise liquid. Evidence also suggests that it is the turbulent flow of the liquid that generates the earth's magnetic field. (JN)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=stuff&pg=2&id=EJ836249','ERIC'); return false;" href="https://eric.ed.gov/?q=stuff&pg=2&id=EJ836249"><span>From Context to <span class="hlt">Core</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Campus Technology, 2008</p> <p>2008-01-01</p> <p>At Campus Technology 2008, Arizona State University Technology Officer Adrian Sannier mesmerized audiences with his mandate to become more efficient by doing only the "<span class="hlt">core</span>" tech stuff--and getting someone else to slog through the context. This article presents an excerpt from Sannier's hour-long keynote address at Campus Technology '08. Sannier…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED403478.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED403478.pdf"><span><span class="hlt">Core</span> Directions in HRD.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>1996</p> <p></p> <p>This document consists of four papers presented at a symposium on <span class="hlt">core</span> directions in human resource development (HRD) moderated by Verna Willis at the 1996 conference of the Academy of Human Resource Development. "Reengineering the Organizational HRD Function: Two Case Studies" (Neal Chalofsky) reports an action research study in which…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/869712','DOE-PATENT-XML'); return false;" href="http://www.osti.gov/scitech/servlets/purl/869712"><span>Electromagnetic pump stator <span class="hlt">core</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p>Fanning, Alan W.; Olich, Eugene E.; Dahl, Leslie R.</p> <p>1995-01-01</p> <p>A stator <span class="hlt">core</span> for supporting an electrical coil includes a plurality of groups of circumferentially abutting flat laminations which collectively form a bore and perimeter. A plurality of wedges are interposed between the groups, with each wedge having an inner edge and a thicker outer edge. The wedge outer edges abut adjacent ones of the groups to provide a continuous path around the perimeter.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=Alloys&pg=3&id=EJ285781','ERIC'); return false;" href="https://eric.ed.gov/?q=Alloys&pg=3&id=EJ285781"><span>The Earth's <span class="hlt">Core</span>.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Jeanloz, Raymond</p> <p>1983-01-01</p> <p>The nature of the earth's <span class="hlt">core</span> is described. Indirect evidence (such as that determined from seismological data) indicates that it is an iron alloy, solid toward its center but otherwise liquid. Evidence also suggests that it is the turbulent flow of the liquid that generates the earth's magnetic field. (JN)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=technical+AND+spec&id=ED474835','ERIC'); return false;" href="https://eric.ed.gov/?q=technical+AND+spec&id=ED474835"><span><span class="hlt">Core</span> Competencies. SPEC Kit.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>McNeil, Beth, Comp.</p> <p>2002-01-01</p> <p>This SPEC (Systems and Procedures Exchange Center) Kit presents the results of a survey of Association of Research Libraries (ARL) member libraries designed to investigate the status of <span class="hlt">core</span> competencies (i.e., the skills, knowledge, abilities, and attributes that employees across an organization are expected to have to contribute successfully…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=place+AND+strategies&pg=7&id=EJ836249','ERIC'); return false;" href="http://eric.ed.gov/?q=place+AND+strategies&pg=7&id=EJ836249"><span>From Context to <span class="hlt">Core</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Campus Technology, 2008</p> <p>2008-01-01</p> <p>At Campus Technology 2008, Arizona State University Technology Officer Adrian Sannier mesmerized audiences with his mandate to become more efficient by doing only the "<span class="hlt">core</span>" tech stuff--and getting someone else to slog through the context. This article presents an excerpt from Sannier's hour-long keynote address at Campus Technology '08. Sannier…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014AGUFMOS21B1143B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014AGUFMOS21B1143B"><span><span class="hlt">Fluid</span> and Solute Fluxes from the Deformation Front to the Upper Slope at the Cascadia Margin</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Berg, R. D.; Solomon, E. A.; Johnson, H. P.; Culling, D. P.; Harris, R. N.</p> <p>2014-12-01</p> <p><span class="hlt">Fluid</span> expulsion from accretionary convergent margins may be an important factor in global geochemical cycling and biogeochemical processes. However, the rates and distribution of <span class="hlt">fluid</span> flow at these margins are not well known. To better understand these processes at the Cascadia margin, we collected 35 short (<1m) sediment <span class="hlt">cores</span> and 23 Mosquito <span class="hlt">fluid</span> flow meter measurements along a transect from the deformation front to the upper slope offshore of the Washington coast as part of a coupled heat and <span class="hlt">fluid</span> flow survey. We identified two active seep areas, one emergent at 1990 mbsl, and one long-lived at 1050 mbsl. At both sites we observed carbonate deposits several meters thick and hundreds of meters in horizontal dimension. Thermogenic hydrocarbons measured in pore waters at the long-lived seep site indicate deeply-sourced <span class="hlt">fluids</span> originating at >80oC, likely migrating along faults. In addition, pore water solute profiles from the emergent seep site suggest active shallow circulation in the upper sediment column, with implications for the seep biological community and <span class="hlt">fluid</span> budget of the margin. Pore <span class="hlt">fluid</span> advection rates along the transect are used to characterize the geographic distribution and geologic controls on active <span class="hlt">fluid</span> pathways. Pore water solute profiles from the sediment <span class="hlt">cores</span> are integrated with the measured <span class="hlt">fluid</span> advection rates to calculate solute fluxes out of the margin. Our transect of <span class="hlt">fluid</span> flow and pore water chemistry measurements from the Cascadia margin will help to better understand <span class="hlt">fluid</span> and geochemical cycling at accretionary convergent margins.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2007AGUFM.P41A0211N','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2007AGUFM.P41A0211N"><span>Planetary <span class="hlt">Cores</span> Flows Driven by Mantle Libration</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Noir, J.; Aurnou, J.; Wicht, J.</p> <p>2007-12-01</p> <p>We investigate, via a set of laboratory and numerical experiments, the flow induced inside a spherical <span class="hlt">fluid</span> cavity by torsional oscillation of the outer shell. Our goal is to produce models of libration-driven flows within planetary <span class="hlt">cores</span> and subsurface oceans. Such models will improve our understanding of a number of planetary bodies including Mercury, Europa, Io, Callisto, Ganymede and the Earth's Moon. Here we focus on the case of a spherical shell with either a small inner <span class="hlt">core</span> or no inner <span class="hlt">core</span>; moderate planetary rotation rate (Ekman number E = 10- 4); and libration frequency equal to the planetary rotation frequency ("synchronous libration"). We vary only the non-dimensional amplitude of libration α, defined as α=Δ φ (2 π flib) / Ømega, where Δ φ is the total angular displacement, flib is the libration frequency and Ømega is the background angular rotation rate. Different <span class="hlt">core</span> flow regimes are observed as α is increased. For a small amplitude of libration (α \\ll 1)), the oscillatory motion of the outer boundary drives laminar flows that are well described as inertial modes and waves. For α ~ 0.5, azimuthal roll instabilities periodically develop and decay along the outer shell boundary during each libration cycle. These instabilities tend to develop when the outer shell is decelerating and decay when it is accelerating. By further increasing α, the flow pattern transitions from axisymmetric rolls (m=0) to wavy rolls (m ≠ 0), and then to turbulent flow. Extrapolating our present results to Mercury suggests that mantle libration can drive large-scale instabilities in its liquid metal <span class="hlt">core</span>. The authors wish to the thank NASA's PG&G and PME Programs for reasearch funding under grant #NNG0697G.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19860003416','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19860003416"><span>Separation of <span class="hlt">core</span> and crustal magnetic field sources</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Shure, L.; Parker, R. L.; Langel, R. A.</p> <p>1985-01-01</p> <p><span class="hlt">Fluid</span> motions in the electrically conducting <span class="hlt">core</span> and magnetized crustal rocks are the two major sources of the magnetic field observed on or slightly above the Earth's surface. The exact separation of these two contributions is not possible without imposing a priori assumptions about the internal source distribution. Nonetheless models like these were developed for hundreds of years Gauss' method, least squares analysis with a truncated spherical harmonic expansion was the method of choice for more than 100 years although he did not address separation of <span class="hlt">core</span> and crustal sources, but rather internal versus external ones. Using some arbitrary criterion for appropriate truncation level, we now extrapolate downward <span class="hlt">core</span> field models through the (approximately) insulating mantle. Unfortunately our view can change dramatically depending on the degree of truncation for describing <span class="hlt">core</span> sources.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014GeoJI.196.1544A','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014GeoJI.196.1544A"><span>Self-induced seismicity due to <span class="hlt">fluid</span> circulation along faults</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Aochi, Hideo; Poisson, Blanche; Toussaint, Renaud; Rachez, Xavier; Schmittbuhl, Jean</p> <p>2014-03-01</p> <p>In this paper, we develop a system of equations describing <span class="hlt">fluid</span> migration, fault rheology, fault thickness evolution and shear rupture during a seismic cycle, triggered either by tectonic loading or by <span class="hlt">fluid</span> injection. Assuming that the phenomena predominantly take place on a single fault described as a finite permeable zone of variable width, we are able to project the equations within the volumetric fault <span class="hlt">core</span> onto the 2-D fault interface. From the basis of this `fault lubrication approximation', we simulate the evolution of seismicity when <span class="hlt">fluid</span> is injected at one point along the fault to model-induced seismicity during an injection test in a borehole that intercepts the fault. We perform several parametric studies to understand the basic behaviour of the system. <span class="hlt">Fluid</span> transmissivity and fault rheology are key elements. The simulated seismicity generally tends to rapidly evolve after triggering, independently of the injection history and end when the stationary path of <span class="hlt">fluid</span> flow is established at the outer boundary of the model. This self-induced seismicity takes place in the case where shear rupturing on a planar fault becomes dominant over the <span class="hlt">fluid</span> migration process. On the contrary, if healing processes take place, so that the <span class="hlt">fluid</span> mass is trapped along the fault, rupturing occurs continuously during the injection period. Seismicity and <span class="hlt">fluid</span> migration are strongly influenced by the injection rate and the heterogeneity.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19900016601','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19900016601"><span>Lunar Polar <span class="hlt">Coring</span> Lander</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Angell, David; Bealmear, David; Benarroche, Patrice; Henry, Alan; Hudson, Raymond; Rivellini, Tommaso; Tolmachoff, Alex</p> <p>1990-01-01</p> <p>Plans to build a lunar base are presently being studied with a number of considerations. One of the most important considerations is qualifying the presence of water on the Moon. The existence of water on the Moon implies that future lunar settlements may be able to use this resource to produce things such as drinking water and rocket fuel. Due to the very high cost of transporting these materials to the Moon, in situ production could save billions of dollars in operating costs of the lunar base. Scientists have suggested that the polar regions of the Moon may contain some amounts of water ice in the regolith. Six possible mission scenarios are suggested which would allow lunar polar soil samples to be collected for analysis. The options presented are: remote sensing satellite, two unmanned robotic lunar <span class="hlt">coring</span> missions (one is a sample return and one is a data return only), two combined manned and robotic polar <span class="hlt">coring</span> missions, and one fully manned <span class="hlt">core</span> retrieval mission. One of the combined manned and robotic missions has been singled out for detailed analysis. This mission proposes sending at least three unmanned robotic landers to the lunar pole to take <span class="hlt">core</span> samples as deep as 15 meters. Upon successful completion of the <span class="hlt">coring</span> operations, a manned mission would be sent to retrieve the samples and perform extensive experiments of the polar region. Man's first step in returning to the Moon is recommended to investigate the issue of lunar polar water. The potential benefits of lunar water more than warrant sending either astronauts, robots or both to the Moon before any permanent facility is constructed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.osti.gov/scitech/biblio/5930975','SCIGOV-STC'); return false;" href="https://www.osti.gov/scitech/biblio/5930975"><span><span class="hlt">Fluid</span> loss control differences of crosslinked and linear fracturing <span class="hlt">fluids</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Zigrye, J.L.; Whitfill, D.L.; Sievert, J.A.</p> <p>1983-01-01</p> <p>Three fracturing <span class="hlt">fluids</span>--a crosslinked guar, a delayed hydrating guar, and a linear guar--were tested for <span class="hlt">fluid</span> loss control at set time intervals while being conditioned in a heated, pressurized flow loop. Each <span class="hlt">fluid</span> was tested with 3 different <span class="hlt">fluid</span> loss additive systems: diesel, silica flour, and a combination of diesel and silica flour. The crosslinked system was tested also with 2 additional <span class="hlt">fluid</span> loss additive systems. These <span class="hlt">fluids</span> were diesel plus an anionic surfactant and the combination of diesel/silica flour plus the anionic surfactant. These tests show that the <span class="hlt">fluid</span> loss of crosslinked fracturing <span class="hlt">fluids</span> is best controlled by using diesel in combination with a surfactant or a properly sized particulate material. The <span class="hlt">fluid</span> loss of linear <span class="hlt">fluids</span> is controlled best with particulate additives.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22918651','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22918651"><span>[<span class="hlt">Fluid</span> management: estimation of <span class="hlt">fluid</span> status].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Renner, Jochen; Broch, Ole; Bein, Berthold</p> <p>2012-07-01</p> <p>Cardiac filling pressures alone are not appropriate to estimate the effect of a volume challenge on the corresponding change in stroke volume. Dynamic variables of <span class="hlt">fluid</span> responsiveness have been shown to discriminate with acceptable sensitivity and specificity between responders and non-responders to a volume challenge. However, several clinical confounders have been indentified which potentially influence the predictive power of these variables. Sound knowledge of these confounders and the acknowledgement that there is no unique threshold value for volume optimisation but a considerable "gray zone" is necessary to fully exploit the advantages of functional haemodynamic monitoring.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009EGUGA..1110581P','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009EGUGA..1110581P"><span><span class="hlt">Fluid</span> transport in faults and associated hydrofracture injection in <span class="hlt">fluid</span> reservoirs</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Philipp, S. L.; Gudmundsson, A.</p> <p>2009-04-01</p> <p>Faults may have strong effects on the permeability of <span class="hlt">fluid</span> reservoirs. Fault zones normally consist of two major hydrogeological units: a fault <span class="hlt">core</span> and a fault damage zone. The <span class="hlt">core</span> consists primarily of breccia and other cataclastic rocks; in the damage zone fractures of various sizes occur. Active faults commonly have great effects on the transport of crustal <span class="hlt">fluids</span>. For groundwater, for example, the effects of fault slip during earthquakes include changes in the yield of springs, water table, and stream flow. Similar effects occur in geothermal reservoirs. During fault slip (in an earthquake) all the pores and small fractures that meet with the slip plane become interconnected so that the fault may suddenly develop a very high hydraulic conductivity. The current stress field also controls <span class="hlt">fluid</span> transport in fault zones. One reason for this is that fractures are sensitive to changes in the stress field and deform much more easily than circular pores. In a fault zone, most fractures in the damage zone are commonly subparallel to the main fault plane, in which case the effect of the current stress field can be strong. In a stress field where the maximum principal compressive stress is perpendicular to the strike of the fractures, many fractures will close and <span class="hlt">fluid</span> transport is inhibited. In a stress field where the maximum principal compressive is parallel with the fracture strike, however, fractures tend to be open and <span class="hlt">fluid</span> transport is enhanced. The best evidences of former <span class="hlt">fluid</span> transport paths, particularly in deeply eroded, inactive fault zones, are networks of mineral veins. We present field examples of faults and mineral veins in layered sedimentary rocks from the Bristol Channel Basin, UK. The different lithologies studied include: (1) mudstones (Upper Triassic) with numerous faults and gypsum veins at Watchet, Somerset Coast (Southwest England); and (2) limestone and shale layers (Lower Jurassic) dissected by faults with calcite veins near Kilve</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li class="active"><span>25</span></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_25 --> <center> <div class="footer-extlink text-muted"><small>Some links on this page may take you to non-federal websites. 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