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There are a total of 98231 record(s) matching your query.
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Progress on Space Borne Laser Risk Reduction at Goddard Space Flight Center
Author(s): Heaps, William S.; Novo-Gradac, Anne-Marie
Abstract: At the direction of NASA Headquarters NASA Goddard Space Flight Center (GSFC) and NASA Langley Research Center (LaRC) undertook in 2002 a program in fundamental research on laser manufacturing technologies aimed at improving ...
NASA Center: Goddard Space Flight Center
Publication Year: 2004
Added to NTRS: 2004-10-28
Document ID: 20040077267
Diffuse Galactic Continuum Gamma Rays. A Model Compatible with EGRET Data and Cosmic-ray Measurements
Author(s): Strong, Andrew W.; Moskalenko, Igor V.; Reimer, Olaf
Abstract: We present a study of the compatibility of some current models of the diffuse Galactic continuum gamma-rays with EGRET data. A set of regions sampling the whole sky is chosen to provide a comprehensive range of tests. The ...
NASA Center: Goddard Space Flight Center
Publication Year: 2004
Added to NTRS: 2004-10-28
Document ID: 20040081223
Performance of NASA Equation Solvers on Computational Mechanics Applications
Author(s): Storaasli, Olaf O.
Abstract: This paper describes the performance of a new family of NASA-developed equation solvers used for large-scale (i.e. 551,705 equations) structural analysis. To minimize computer time and memory, the solvers are divided by ...
NASA Center: Langley Research Center
Publication Year: 1996
Added to NTRS: 2004-10-28
Document ID: 20040110968
Implementation and Performance Issues in Collaborative Optimization
Author(s): Braun, Robert; Gage, Peter; Kroo, Ilan; Sobieski, Ian
Abstract: Collaborative optimization is a multidisciplinary design architecture that is well-suited to large-scale multidisciplinary optimization problems. This paper compares this approach with other architectures, examines the ...
NASA Center: Langley Research Center
Publication Year: 1996
Added to NTRS: 2004-10-28
Document ID: 20040110947
Orbiter Aerodynamic Acceleration Flight Measurements in the Rarefied-Flow Transition Regime
Author(s): Blanchard, Robert C.; Wilmoth, Richard G.; LeBeau, Gerald J.
Abstract: Acceleration data taken from the Orbital Acceleration Research Experiment (OARE) during reentry on STS-62 have been analyzed using calibration factors taken on orbit. This is the first Orbiter mission which collected OARE ...
NASA Center: Johnson Space Center, Langley Research Center
Publication Year: 1996
Added to NTRS: 2004-10-28
Document ID: 20040110941; Report Number: AIAA Paper96-2467
Al-Li Alloy 1441 for Fuselage Applications
Author(s): Bird, R. K.; Dicus, D. L.; Fridlyander, J. N.; Sandler, V. S.
Abstract: A cooperative investigation was conducted to evaluate Al-Cu-Mg-Li alloy 1441 for long service life fuselage applications. Alloy 1441 is currently being used for fuselage applications on the Russian Be-103 amphibious ...
NASA Center: Langley Research Center
Publication Year: 2000
Added to NTRS: 2004-10-28
Document ID: 20040086797
Renormalization Group Tutorial
Author(s): Bell, Thomas L.
Abstract: Complex physical systems sometimes have statistical behavior characterized by power- law dependence on the parameters of the system and spatial variability with no particular characteristic scale as the parameters approach ...
NASA Center: Goddard Space Flight Center
Publication Year: 2004
Added to NTRS: 2004-10-28
Document ID: 20040079733
Overview 2003 of NASA Multi-D Stirling Convertor Development and DOE and NASA Stirling Regenerator R and D Efforts
Author(s): Twe, Roy; Ibrahim, Mounir; Simon, Terrence; Mantell, Susan; Gedeon, David; Qiu, Songgang; Wood, Gary
Abstract: This paper will report on (1) continuation through the 3rd year of a NASA grant for multi-dimensional Stirling CFD code development and validation, (2) continuation through the 3rd and final year of a Department of Energy, ...
NASA Center: Glenn Research Center
Publication Year: 2004
Added to NTRS: 2004-10-28
Document ID: 20040111429
NEXIS Reservoir Cathode 2000 Hour Life Test
Author(s): Vaughn, Jason; Schneider, Todd; Polk, Jay; Goebel, Dan; Ohlinger, Wayne; Hill, D. Norm
Abstract: The current design of the Nuclear Electric Xenon Ion System (NEXIS) employs a reservoir cathode as both the discharge and neutralizer cathode to meet the 10 yr thruster design life. The main difference between a reservoir ...
NASA Center: Jet Propulsion Laboratory, Marshall Space Flight Center
Publication Year: 2004
Added to NTRS: 2004-10-28
Document ID: 20040086537
Using Bond Graphs for Articulated, Flexible Multi-bodies, Sensors, Actuators, and Controllers with Application to the International Space Station
Author(s): Montgomery, Raymond C.; Granda, Jose J.
Abstract: Conceptually, modeling of flexible, multi-body systems involves a formulation as a set of time-dependent partial differential equations. However, for practical, engineering purposes, this modeling is usually done using the ...
NASA Center: Langley Research Center
Publication Year: 2003
Added to NTRS: 2004-10-28
Document ID: 20040085770
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