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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Computer simulation study to determine normality or nonnormality on any given population of sampled data - statistical probability distribution
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Ionosphere model to explain spectrum of brightness temperatures found in radio emission from Venus atmosphere
Model for Martian atmosphere and planetary surface assuming atmospheric spectrum with purely scattering properties and surface covered with limonite dust
Fock reinterpretation of Einstein general relativity theory leads to disagreement with gravitational red shift experiments
Hydrodynamics of plasma flow in pericapillary spaces, postulating fluid annulus outside capillary wall as plasma reservoir responsible for hematocrit ratios
Cross hatching on various body surfaces due to periodic surface pressure fluctuations, discussing origin from counterrotating longitudinal vortices in boundary layer
Radial pulsation mode of convective envelopes in adiabatic equilibrium for variable M red supergiant stars
Microtektites chemical analysis data providing appraisal of strewn field boundaries, implying lunar origin
Cross hatching on various body surfaces due to periodic surface pressure fluctuations, discussing origin from counterrotating longitudinal vortices in boundary layer
Investigating effects of lava outgassing on primary colonization by organisms
The function of moon position for shoreline orientation by talitrids is investigated. Three major results were found: (1) Observed cases of compensation for changes in the direction of the moon are based on physiological rhythm with a period of about 25 hours which can persist for at least several days under constant conditions. (2) The zeitgeber for physiological rhythm may be either moonlight or some other factor associated with the tides. (3) If talitrids are long removed from environmental entrainment, either artifically or naturally, the internal rhythm no longer exerts an appreciable influence on the angle of lunar orientation; in such cases the system deteriorates into constant angle orientation, with an angle which is determined by the beach orgin, but may be modified by lighting conditions.
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Possible alternatives to the supernovae theory on the orgin of cosmic ray bursts are examined. In particular, the possibility that these outbursts are simply giant versions of the X-ray burst typically seen in solar flares is investigated. It was suggested that the outbursts are caused by the bresstrahlung of electrons accelerated to high energies in a stellar flare event.
The possibility that soft gamma ray bursts are versions of X-ray bursts typically seen in solar flares and not products of supernovae events is investigated. Results show that the bursts have longer time scales that those predicted for supernovae events. It was suggested that the bursts result from the acceleration of electron bremsstrahlung to high energies in a stellar flare event.
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A model is presented in explanation of the observation of sodium D-line emission from Io. The model involves: (1) charged-particle sputtering of sodium from Io's surface, (2) ejection of sodium into a cloud surrounding Io, and (3) resonant scattering of incident sunlight. Observational consequences and tests of the proposed model are also discussed.
It is hypothesized that constituents escaping the atmosphere of Titan are unlikely to have sufficient velocity to escape from Saturn. Thus most of the material will enter into elliptical orbits which, at some point, cross Titan's orbit at a small angle. In total, this matter will form a 'doughnut' shaped feature, roughly centered on Titan's orbit and having dimensions of about 20 Saturn radii in the Saturnian-equatorial plane and 10 Saturn radii normal to this plane. It is assumed that the material is lost from the doughnut when it is ionized or is recaptured by Titan's atmosphere. The upper limit on the density of hydrogen in the ring is estimated to be about 1,000 particles per cu cm, with up to 99% of the particles in the doughnut being recaptured by Titan.