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There are a total of 2389 record(s) matching your query.
Sorted by: Date Added To NTRS in Descending order
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Hypersonic flow past open cavities
Author(s): Morgenstern, Algacyr, Jr.; Chokani, Ndaona
Abstract: The hypersonic flow over a cavity is investigated. The time-dependent compressible Navier-Stokes equations are numerically solved. An implicit algorithm, with a subiteration procedure to recover time accuracy, is used to ...
NASA Center: NASA (non Center Specific) Publication Year: 1994
Added to NTRS: 2008-04-09
Accession Number: 95A87207; Document ID: 19950055608
Software fault tolerance in computer operating systems
Author(s): Iyer, Ravishankar K.; Lee, Inhwan
Abstract: This chapter provides data and analysis of the dependability and fault tolerance for three operating systems: the Tandem/GUARDIAN fault-tolerant system, the VAX/VMS distributed system, and the IBM/MVS system. Based on ...
NASA Center: NASA (non Center Specific) Publication Year: 1994
Added to NTRS: 2006-11-10
Accession Number: 95N24993; Document ID: 19950018573; Report Number: NAS 1.26:197999, NASA-CR-197999
The effects of gravity on the circadian timing system
Author(s): Fuller, C. A.
Abstract: The physiological system responsible for the temporal coordination of an organism is the circadian timing system (CTS). This system provides two forms of temporal coordination. First, the CTS provides for synchronization ...
NASA Center: Ames Research Center Publication Year: 1994
Added to NTRS: 2006-08-02
Document ID: 20040089969
Cardiovascular responses to repetitive exposure to hyper- and hypogravity states produced by parabolic flight
Author(s): Mukai, C. N.; Lathers, C. M.; Charles, J. B.; Bennett, B. S.
Abstract: Physiologic changes to repetitive hyper- and hypogravity stresses occurring during eight to ten parabolas on NASA's KC-135 aircraft were studied. Hemodynamic responses in 11 subjects in 4 different postures (supine, ...
NASA Center: Johnson Space Center Publication Year: 1994
Added to NTRS: 2006-08-02
Document ID: 20040192874
Impact of altered gravity on aspects of cell biology
Author(s): Claassen, D. E.; Spooner, B. S.
Abstract: No abstract available
NASA Center: NASA (non Center Specific) Publication Year: 1994
Added to NTRS: 2006-08-02
Document ID: 20050000399
The effect of blood volume loss on cardiovascular response to lower body negative pressure using a mathematical model
Author(s): Karam, E. H.; Srinivasan, R. S.; Charles, J. B.; Fortney, S. M.
Abstract: Different mathematical models of varying complexity have been proposed in recent years to study the cardiovascular (CV) system. However, only a few of them specifically address the response to lower body negative pressure ...
NASA Center: Johnson Space Center Publication Year: 1994
Added to NTRS: 2006-08-02
Document ID: 20040089958
Cardiopulmonary adaptation to weightlessness
Author(s): Prisk, G. K.; Guy, H. J.; Elliott, A. R.; West, J. B.
Abstract: The lung is profoundly affected by gravity. The absence of gravity (microgravity) removes the mechanical stresses acting on the lung paranchyma itself, resulting in a reduction in the deformation of the lung due to its own ...
NASA Center: Johnson Space Center Publication Year: 1994
Added to NTRS: 2006-08-02
Document ID: 20040089966
An analysis of interplanetary space radiation exposure for various solar cycles
Author(s): Badhwar, G. D.; Cucinotta, F. A.; O'Neill, P. M.
Abstract: The radiation dose received by crew members in interplanetary space is influenced by the stage of the solar cycle. Using the recently developed models of the galactic cosmic radiation (GCR) environment and the ...
NASA Center: Johnson Space Center Publication Year: 1994
Added to NTRS: 2006-08-02
Document ID: 20050000351
Knee-joint proprioception during 30-day 6 degrees head-down bed rest with isotonic and isokinetic exercise training
Author(s): Bernauer, E. M.; Walby, W. F.; Ertl, A. C.; Dempster, P. T.; Bond, M.; Greenleaf, J. E.
Abstract: To determine if daily isotonic exercise or isokinetic exercise training coupled with daily leg proprioceptive training, would influence leg proprioceptive tracking responses during bed rest (BR), 19 men (36 /- SD 4 years, ...
NASA Center: Ames Research Center Publication Year: 1994
Added to NTRS: 2006-08-02
Document ID: 20050000280
Causes of chronic orthostatic hypotension
Author(s): Robertson, D.; Robertson, R. M.
Abstract: OBJECTIVE: To determine the frequency of various causes of orthostatic hypotension. DESIGN: Survey. SETTING: Tertiary referral center. PATIENTS: One hundred patients with moderate to severe orthostatic hypotension. RESULTS: ...
NASA Center: NASA (non Center Specific) Publication Year: 1994
Added to NTRS: 2006-08-02
Document ID: 20050000319
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