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There are a total of 1753 record(s) matching your query.
Sorted by: NASA Center in Ascending order
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A computerized traffic control algorithm to determine optimal traffic signal settings
Author(s): Seldner, K.
Abstract: An algorithm was developed to optimally control the traffic signals at each intersection using a discrete time traffic model applicable to heavy or peak traffic. Off line optimization procedures were applied to compute the ...
NASA Center: Glenn Research Center
Publication Year: 1977
Added to NTRS: 2004-11-03
Accession Number: 77N27035; Document ID: 19770020091; Report Number: E-9084, NASA-TM-X-73607
Correlation of finite element free vibration predictions using random vibration test data
Author(s): Chambers, Jeffrey A.
Abstract: Finite element analysis is regularly used during the engineering cycle of mechanical systems to predict the response to static, thermal, and dynamic loads. The finite element model (FEM) used to represent the system is often ...
NASA Center: Glenn Research Center
Publication Year: 1994
Added to NTRS: 2006-09-29
Accession Number: 95N17258; Document ID: 19950010843; Report Number: E-9243, NAS 1.15:106787, NASA-TM-106787
Simulating Fatigue Crack Growth in Spiral Bevel Gears
Author(s): Spievak, Lisa E.; Wawrzynek, Paul A.; Ingraffea, Anthony R.
Abstract: The majority of helicopter transmission systems utilize spiral bevel gears to convert the horizontal power from the engine into vertical power for the rotor. Due to the cyclical loading on a gear's tooth, fatigue crack ...
NASA Center: Glenn Research Center
Publication Year: 2000
Added to NTRS: 2005-08-25
Document ID: 20000065643; Report Number: ARL-CR-451, E-12287, NAS 1.26:210062, NASA/CR-2000-210062
Evaluation of an innovative high temperature ceramic wafer seal for hypersonic engine applications
Author(s): Steinetz, Bruce M.
Abstract: A critical mechanical system in advanced hypersonic engines is the panel-edge seal system that seals gaps between the articulating engine panels and the adjacent engine splitter walls. Significant advancements in seal ...
NASA Center: Glenn Research Center
Publication Year: 1992
Added to NTRS: 2005-08-25
Accession Number: 92N20815; Document ID: 19920011573; Report Number: E-6048, NAS 1.15:105556, NASA-TM-105556
Some plane problem elastostatic solutions for plates having a v-notch
Author(s): Gross, B.
Abstract: No Abstract Available
NASA Center: Glenn Research Center
Publication Year: 1970
Added to NTRS: 2004-11-03
Accession Number: 73N74514; Document ID: 19730065272; Report Number: NASA-TM-X-69370
Resonance tube hazards in oxygen systems
Author(s): Phillips, B. R.
Abstract: An experimental and analytical program was carried out to determine whether fluid dynamic oscillations could create a hazard in gaseous oxygen flow systems. The particular fluid dynamic oscillation studied was the resonance ...
NASA Center: Glenn Research Center
Publication Year: 1982
Added to NTRS: 2004-11-03
Accession Number: 82N21415; Document ID: 19820013541; Report Number: E-1140, NAS 1.15:82801, NASA-TM-82801
Calculation of propulsive nozzle flowfields in multidiffusing chemically reacting environments
Author(s): Kacynski, Kenneth John
Abstract: An advanced engineering model has been developed to aid in the analysis and design of hydrogen/oxygen chemical rocket engines. The complete multispecies, chemically reacting and multidiffusing Navier-Stokes equations are ...
NASA Center: Glenn Research Center
Publication Year: 1994
Added to NTRS: 2005-08-25
Accession Number: 94N28835; Document ID: 19940024332; Report Number: E-8665, NAS 1.15:106532, NASA-TM-106532
Active feed array compensation for reflector antenna surface distortions
Author(s): Acosta, Roberto J.
Abstract: The feasibility of electromagnetic compensation for reflector antenna surface distortions is investigated. The performance characteristics of large satellite communication reflector antenna systems degrade as the reflector ...
NASA Center: Glenn Research Center
Publication Year: 1988
Added to NTRS: 2004-11-03
Accession Number: 88N25762; Document ID: 19880016378; Report Number: E-4015, NAS 1.15:100826, NASA-TM-100826
Microgravity vibration isolation technology: Development to demonstration
Author(s): Grodsinsky, Carlos M.
Abstract: The low gravity environment provided by space flight has afforded the science community a unique area for the study of fundamental and technological sciences. However, the dynamic environment observed on space shuttle ...
NASA Center: Glenn Research Center
Publication Year: 1993
Added to NTRS: 2005-08-25
Accession Number: 94N11703; Document ID: 19940007231; Report Number: E-8067, NAS 1.15:106320, NASA-TM-106320
Numerical simulation of subsonic and transonic propeller flow
Author(s): Snyder, Aaron
Abstract: The numerical simulation of 3-D transonic flow about a system of propeller blades is investigated. In particular, it is shown that the use of helical coordinates significantly simplifies the form of the governing equation ...
NASA Center: Glenn Research Center
Publication Year: 1988
Added to NTRS: 2005-10-13
Accession Number: 88N20262; Document ID: 19880010878; Report Number: E-3725, NAS 1.15:100163, NASA-TM-100163
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