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There are a total of 1031821 record(s) matching your query.
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An evaluation of excitation techniques for time domain based flutter data processing
Author(s): Pinkelman, J. K.; Batill, S. M.; Vernon, L. E.; Kehoe, M. W.
Abstract: Numerically simulated, wind tunnel and flight test experimental data were used to evaluate various types of system excitation sources for subcritical flutter testing. Emphasis was placed upon the determination of modal ...
NASA Center: Ames Research Center, Dryden Flight Research Center
Publication Year: 1993
Added to NTRS: 2004-11-03
Accession Number: 93A34133; Document ID: 19930050136; Report Number: AIAA PAPER 93-1602
Perspectives on the Future of CFD
Author(s): Kwak, Dochan
Abstract: This viewgraph presentation gives an overview of the future of computational fluid dynamics (CFD), which in the past has pioneered the field of flow simulation. Over time CFD has progressed as computing power. Numerical ...
NASA Center: Ames Research Center
Publication Year: 2000
Added to NTRS: 2008-06-02
Document ID: 20010087133
Long-Term X-Ray Variability of Circinus X-1
Author(s): Saz Parkinson, P. M.; Tournear, D. M.; Bloom, E. D.; Focke, W. B.; Reilly, K. T.
Abstract: We present an analysis of long term X-ray monitoring observations of Circinus X-1 (Cir X-1) made with four different instruments: Vela 5B, Ariel V ASM, Ginga ASM, and RXTE ASM, over the course of more than 30 years. We use ...
NASA Center: Ames Research Center
Publication Year: 2003
Added to NTRS: 2004-11-03
Document ID: 20040004081; Report Number: DE2003-812964, SLAC-PUB-9678
A review of current finite difference rotor flow methods
Author(s): Caradonna, F. X.; Tung, C.
Abstract: Rotary-wing computational fluid dynamics is reaching a point where many three-dimensional, unsteady, finite-difference codes are becoming available. This paper gives a brief review of five such codes, which treat the small ...
NASA Center: Ames Research Center
Publication Year: 1986
Added to NTRS: 2004-11-03
Accession Number: 87A19275; Document ID: 19870032001
Using Temporal Fill Factor to Reduce Frame Reconstruction Rates
Author(s): Larimer, James; Balram, Nikhil; Gille, Jennifer; Luszcz, Jeffery
Abstract: The newer active matrix display technologies such as TFT-LCD, DMD, PDP maintain their pixel values through the entire frame time, presenting a 100 temporal fill factor, in contrast to the duty cycle produced by the phosphor ...
NASA Center: Ames Research Center
Publication Year: 1997
Added to NTRS: 2004-11-03
Document ID: 20030067899
Halogenation of microcapsule walls
Author(s): Davis, T. R.; Schaab, C. K.; Scott, J. C.
Abstract: Procedure for halogenation of confining walls of both gelatin and gelatin-phenolic resin capsules is similar to that used for microencapsulation. Ten percent halogen content renders capsule wall nonburning; any higher ...
NASA Center: Ames Research Center
Publication Year: 1972
Added to NTRS: 2005-09-30
Accession Number: 72B10161; Document ID: 19720000161; Report Number: ARC-10410
Area postrema ablations in cats: Evidence for separate neural routes for motion- and xylazine-induced CTA and emesis
Author(s): Corcoran, Meryl Lee; Fox, Robert A.; Brizzee, Kenneth R.; Crampton, G.; Daunton, Nancy G.
Abstract: Previous studies on the role of the area postrema (AP) in vomiting induced in the cat by motion and drugs have shown that the AP is not essential for motion-induced vomiting, but is necessary for vomiting to apomorphine and ...
NASA Center: Ames Research Center
Publication Year: 1991
Added to NTRS: 2004-11-03
Accession Number: 94N21906; Document ID: 19940017433
Impacts of PSC Microphysics on Modelled Ozone Loss
Author(s): Drdla, K.; Schoeberl, M. R.
Abstract: Winter-long simulations of the 1999-2000 winter using a coupled microphysical/chemical model have been carried out to explore how PSC microphysics affects ozone loss. Although many models assures that water ice formation ...
NASA Center: Ames Research Center
Publication Year: 2002
Added to NTRS: 2004-11-03
Document ID: 20020060742
Future Airborne IR Spectrometers: Improved Efficiency and Calibration
Author(s): Witteborn, Fred C.; Greene, Thomas; Wooden, Diane H.; Cohen, Martin
Abstract: Ongoing and future spectroscopic investigations of interstellar ices, dust, molecules, solar system surfaces and atmospheric aerosols require spectra that are accurate in shape to about 1 over a significant fraction of the 3 ...
NASA Center: Ames Research Center
Publication Year: 1993
Added to NTRS: 2005-08-25
Accession Number: 97N72097; Document ID: 19970022166; Report Number: NAS 1.15:112322, NASA-TM-112322
An effective and practical fire-protection system
Author(s): Mansfield, J. A.; Riccitiello, S. R.; Fewell, L. L.
Abstract: A high-performance sandwich-type fire protection system comprising a steel outer sheath and insulation combined in various configurations is described. An inherent advantage of the sheath system over coatings is that it ...
NASA Center: Ames Research Center
Publication Year: 1975
Added to NTRS: 2004-11-03
Accession Number: 76A15428; Document ID: 19760032462
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