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There are a total of 185710 record(s) matching your query.
Sorted by: NASA Center in Ascending order
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Effect of creep in titanium alloy Ti-6Al-4V at elevated temperature on aircraft design and flight test
Author(s): Jenkins, J. M.
Abstract: Short-term compressive creep tests were conducted on three titanium alloy Ti-6Al-4V coupons at three different stress levels at a temperature of 714 K (825 F). The test data were compared to several creep laws developed from ...
NASA Center: Ames Research Center, Dryden Flight Research Center
Publication Year: 1984
Added to NTRS: 2008-02-01
Accession Number: 84N18685; Document ID: 19840010617; Report Number: H-1228, NAS 1.15:86033, NASA-TM-86033
End-to-End System Test of the Relative Precision and Stability of the Photometric Method for Detecting Earth-Size Extrasolar Planets
Author(s): Dunham, Edward W.
Abstract: We developed the CCD camera system for the laboratory test demonstration and designed the optical system for this test. The camera system was delivered to Ames in April, 1999 with continuing support mostly in the software ...
NASA Center: Ames Research Center
Publication Year: 2000
Added to NTRS: 2004-11-03
Document ID: 20000031350
A time lag study of the vertical motion simulator computer system
Author(s): Cleveland, W. B.
Abstract: A study was performed to evaluate an experimental method to determine time lags in real-time computer systems as the one associated with the Vertical Motion Simulator at Ames Research Center. The approach was to use an ...
NASA Center: Ames Research Center
Publication Year: 1981
Added to NTRS: 2004-11-03
Accession Number: 81N31228; Document ID: 19810022686; Report Number: A-8654, NASA-TM-81306
Characteristic eddy decomposition of turbulence in a channel
Author(s): Moin, Parviz; Moser, Robert D.
Abstract: The proper orthogonal decomposition technique (Lumley's decomposition) is applied to the turbulent flow in a channel to extract coherent structures by decomposing the velocity field into characteristic eddies with random ...
NASA Center: Ames Research Center
Publication Year: 1991
Added to NTRS: 2005-08-25
Accession Number: 91N21470; Document ID: 19910012157; Report Number: A-88081, NAS 1.15:100065, NASA-TM-100065
Model Checking Real Time Java Using Java PathFinder
Author(s): Lindstrom, Gary; Mehlitz, Peter C.; Visser, Willem
Abstract: The Real Time Specification for Java (RTSJ) is an augmentation of Java for real time applications of various degrees of hardness. The central features of RTSJ are real time threads; user defined schedulers; asynchronous ...
NASA Center: Ames Research Center
Publication Year: 2005
Added to NTRS: 2006-08-02
Document ID: 20060014983
A Wind-Tunnel Investigation of the Stall-Flutter Characteristics of a Supersonic-Type Propeller at Positive and Negative Thrust
Author(s): Rogallo, Vernon L.; Yaggy, Paul F.
Abstract: An investigation has been made utilizing a three-blade, 10-foot- diameter, supersonic-ty-pe propeller to determine propeller flutter characteristics. The particular flutter characteristics of interest were (1) the effect of ...
NASA Center: Ames Research Center
Publication Year: 1959
Added to NTRS: 2008-06-02
Document ID: 19980231990; Report Number: NASA-MEMO-3-9-59A
Comparison of calculated and measured helicopter rotor lateral flapping angles
Author(s): Johnson, W.
Abstract: Calculated and measured values of helicopter rotor flapping angles in forward flight are compared for a model rotor in a wind tunnel and an autogiro in gliding flight. The lateral flapping angles can be accurately predicted ...
NASA Center: Ames Research Center
Publication Year: 1980
Added to NTRS: 2007-06-21
Accession Number: 80N33349; Document ID: 19800024841; Report Number: A-8239, AVRADCOM-TR-80-A-11, NASA-TM-81213
All-electron molecular Dirac-Hartree-Fock calculations: Properties of the group IV monoxides GeO, SnO and PbO
Author(s): Dyall, Kenneth G.
Abstract: Dirac-Hartree-Fock calculations have been carried out on the ground states of the group IV monoxides GeO, SnO and PbO. Geometries, dipole moments and infrared data are presented. For comparison, nonrelativistic, first-order ...
NASA Center: Ames Research Center
Publication Year: 1991
Added to NTRS: 2005-08-25
Accession Number: 92N33661; Document ID: 19920024417; Report Number: NAS 1.26:190825, NASA-CR-190825
Comparison of Membrane ATPases from Extreme Halophiles Isolated from Ancient Salt Deposits
Author(s): Stan-Lotter, Helga; Sulzner, Michael; Egelseer, Eva; Norton, Cynthia F.; Hochstein, Lawrence I.
Abstract: Halophilic microorganisms were isolated from Triassic and Permian salt deposits. Two were rods and grew as red colonies; another was a coccus and produced pink colonies. The rods lysed in solutions that lacked added sodium ...
NASA Center: Ames Research Center
Publication Year: 1993
Added to NTRS: 2004-11-03
Document ID: 19980201425; Report Number: NAS 1.15:206070, NASA/TM-93-206070
Evaluation of some aerodynamic controls for a low aspect ratio missile
Author(s): Higdon, N. S.; Winovich, W.
Abstract: No Abstract Available
NASA Center: Ames Research Center
Publication Year: 1958
Added to NTRS: 2005-10-13
Accession Number: 71N72106; Document ID: 19710066792; Report Number: NACA-RM-A58D17B
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