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U.S. Government Reports
Prospero 9/1/2008 | 0 (0) | 44 | 2 | 0 | English
Perl, Libby, Library of Congress, The current conflicts in Iraq and Afghanistan have brought
renewed attention to the needs of veterans, including the needs of homeless veterans. The Department of Veterans Affairs (VA) estimates that it has served approximately 300 returning veterans in its homeless programs and has identified over 1,000 more as being at risk o f homelessness. Both male and female veterans are overrepresented in the homeless population, and as the number of veterans increases due to the current wars, there is concern that the number of homeless veterans could rise commensurately. ... more>>
Prospero 9/1/2008 | 0 (0) | 51 | 1 | 0 | English
Rodriquez-Ruiz, Juan (NASA Goddard); Thermal interface materials are used in bolted interfaces to promote good thermal conduction between the two. The mounting surface can include panels, heat pipes, electronics boxes, etc... On Lunar Reconnaissance Orbiter (LRO) project the results are directly applicable: a) Several high power avionics boxes b) Several interfaces from RWA to radiator through heat pipe network ... more>>
Prospero 9/1/2008 | 0 (0) | 50 | 2 | 0 | English
Ares I-X will be NASA's first test flight for a new
human-rated launch vehicle since 1981, and the team is well on its way toward completing the vehicle's design and hardware fabrication for an April 2009 launch. ... more>>
Prospero 9/1/2008 | 0 (0) | 35 | 0 | 0 | English
Stereoscopic time-resolved visualization of three-dimensional structures in a hypersonic flow has been performed for the first time. ... more>>
Prospero 9/1/2008 | 0 (0) | 30 | 0 | 0 | English
NASA Goddard; The short interval between successive outbursts of RS Oph strongly suggests that it has a high mass white dwarf accreting at a high rate. This, in turn, suggests the possibility of prominent X-ray emission from RS Oph in quiescence. However, archival quiescent X-ray observations of RS Oph show it to be a modest soft X-ray source but not a strong 2-10 keV X-ray source. In this aspect, RS Oph differs
markedly from T CrB. We speculate on the possible mechanisms that could significantly suppress the 2-10 keV X-ray emission in RS Oph. ... more>>
Prospero 9/1/2008 | 0 (0) | 160 | 4 | 0 | English
Teverovsky, Alexander (Perot Systems Corp.); Solid tantalum capacitors are widely used in space applications to filter low-frequency ripple currents in power supply circuits and stabilize DC voltages in the system. Tantalum capacitors manufactured per military specifications (MIL-PRF-55365) are established reliability components and have less than 0.001% of failures per 1000 hours (the failure rate is less than 10 FIT) for grades D or S, thus positioning these parts among electronic components with the highest reliability characteristics. Still, failures of tantalum capacitors do happen and when it occurs it might have catastrophic consequences for the system. ... more>>
Prospero 9/1/2008 | 0 (0) | 32 | 0 | 0 | English
Begault, Anderson, McClain & Miller , Joel D. (NASA Ames); System and method for visual and audible communication between a central operator and N mobile communicators (N greater than or equal to 2), including an operator transceiver and interface, configured to receive and display, for the operator, visually perceptible and audibly perceptible signals from each of the mobile communicators. ... more>>
Prospero 9/1/2008 | 0 (0) | 40 | 0 | 0 | English
Frey, Herbert V. (NASA Goddard); How large a population of previously undetected impact basins, their size frequency distribution, and how much these added craters and basins will change ideas about the early cratering history and Late Heavy Bombardment on the Moon remains to be determined. ... more>>
Prospero 9/1/2008 | 0 (0) | 86 | 0 | 0 | English
Laser vapor screen (LVS) flow visualization and pressure sensitive paint (PSP) techniques were applied in a unified approach to wind tunnel testing of slender wing and missile configurations dominated by vortex flows and shock waves at subsonic, transonic, and supersonic speeds. ... more>>
Prospero 9/1/2008 | 0 (0) | 24 | 0 | 0 | English
Nguyen & Cutler (G.Washington U.); Describes measurements of a small-scale, high-frequency pulsed detonation tube. The device utilized a mixture of H2 fuel and air, which was injected into the device at frequencies of up to 1200 Hz. ... more>>
Prospero 9/1/2008 | 0 (0) | 26 | 0 | 0 | English
Jones, Lin, Allan, Milholen, Rumsey & Swanson (NASA Langley); Circulation control is a viable active flow control approach that can be used to meet the NASA Subsonic Fixed Wing projects, Cruise Efficient Short Take Off and Landing goals. Currently, circulation control systems are primarily designed using empirical methods. However, large uncertainty in our ability to predict circulation control performance has led to the development of advanced CFD methods. ... more>>
Prospero 9/1/2008 | 0 (0) | 23 | 0 | 0 | English
Hall (National Oceanic and Atmospheric Administration), Cobleigh, Buoni & Howell, Kathleen (NASA Dryden); The National Aeronautics and Space Administration, United
States Forest Service, and National Interagency Fire Center have developed a partnership to develop and demonstrate technology to improve airborne wildfire imaging and data dissemination. ... more>>
Prospero 9/1/2008 | 0 (0) | 36 | 1 | 0 | English
Yamakov, (National Inst. of Aerospace) Saether & Glaessgen (NASA Langley); The coupling of molecular dynamics (MD) simulations with finite element methods (FEM) yields computationally
efficient models that link fundamental material processes at the atomistic level with continuum field responses at higher length scales. The theoretical challenge involves developing a seamless connection along an interface between two inherently different simulation frameworks. ... more>>
Prospero 9/1/2008 | 0 (0) | 21 | 0 | 0 | English
Liechty, Derek S. (NASA Langley); Several modifications aimed at improving physical accuracy are proposed for solving axially symmetric problems building on the DSMC (2007) algorithms introduced by Bird. Originally developed to solve nonequilibrium, rarefied flows, the DSMC method is now regularly used to solve complex problems over a wide range of Knudsen numbers. ... more>>
Prospero 9/1/2008 | 0 (0) | 23 | 0 | 0 | English
Hunter, Xu & Lukco, Dorothy (NASA Glenn Research Center); A miniaturized Schottky diode hydrogen and hydrocarbon sensor and the method of making same is disclosed and claimed. ... more>>
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