35,497 research outputs found

    Shake It Out

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    Out for Change: Racial and Economic Justice Issues in Lesbian, Gay, Bisexual and Transgender Communities

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    This research report identifies the range and complexity of issues faced by low-income LGBT people and LGBT people of color, including poverty and economic hardship, homelessness, the criminal justice system, violence and discrimination, and immigrant rights. The report concludes with a series of recommendations for grantmakers to support these issues

    Four New Capabilities in NASTRAN for Dynamic and Aeroelastic Analyses of Rotating Cyclic Structures

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    Static aerothermoelastic design/analysis of axial-flow compressors, modal flutter analysis of axial-flow turbomachines, forced vibration analysis of rotating cyclic structures and modal flutter analysis of advanced turbopropellers with highly swept blades are four new capabilities developed and implemented in NASTRAN Level 17.7. The contents, applicability and usefulness of these capabilities which were developed and documented under the sponsorship of NASA's Lewis Research Center are discussed. Overall flowcharts and selected examples are presented

    Explicit expressions for optical scalars in gravitational lensing from general matter sources

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    We present explicit expressions for the optical scalars and the deection angle in terms of the energymomentum tensor components of matter distributions. Our work generalizes standard references in the literature where normally stringent assumptions are made on the sources.Comment: Talk presented at the Conference I COSMOSUL (2011) (COSMOLOGY AND GRAVITATION IN THE SOUTHERN CONE

    An Unusual Application of NASTRAN Contour Plotting Capability

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    A procedure is presented for obtaining contour plots of any physical quantity defined on a number of points of the surface of a structure. Rigid Format 1 of HEAT approach in Cosmic NASTRAN is ALTERED to enable use of contour plotting capability for scalar quantities. The ALTERED DMAP sequence is given. Examples include temperature distribution on the face of a cooled laser mirror and the angle of incidence or a radome surface

    Evaluation of Safety of Reinforced Concrete Buildings to Earthquakes

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    National Science Foundation Grant GK-3637

    A route to explain water anomalies from results on an aqueous solution of salt

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    In this paper we investigate the possibility to detect the hypothesized liquid-liquid critical point of water in supercooled aqueous solutions of salts. Molecular dynamics computer simulations are conducted on bulk TIP4P water and on an aqueous solution of sodium chloride in TIP4P water, with concentration c = 0.67 mol/kg. The liquid-liquid critical point is found both in the bulk and in the solution. Its position in the thermodynamic plane shifts to higher temperature and lower pressure for the solution. Comparison with available experimental data allowed us to produce the phase diagrams of both bulk water and the aqueous solution as measurable in experiments. Given the position of the liquid-liquid critical point in the solution as obtained from our simulations, the experimental determination of the hypothesized liquid-liquid critical point of water in aqueous solutions of salts appears possible.Comment: 5 pages, 6 figures. Accepted for publication on the Journal of Chemical Physics (2010)
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