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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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Empirical evaluation of effects of violating assumption of homogeneity of covariance for repeated measures design of variance analysis
Antenna design and very high frequency repeater experiment carried on applications technology satellite for voice communications
Statistical analysis of repeated acceleration and impact loads on airline transports
Statistical analysis of repeated loads on general aviation and transport aircraft
Polypropylene repeated cold drawing and annealing, noting extension recovery and morphological changes
Behavioral reactions of unrestrained normal and labyrinthectomized squirrel monkeys to repeated zero gravity parabolic flight simulation, noting initial disorientation and acclimatization
Metabolic adaptations in rat heart myocardial tissue during repeated exercise on treadmill, noting physical training effect on myocardial glycogenesis
Repeated acceleration effects on histological structure of dog liver
Passive circuit to transform voltage of indefinitely repeated positive or negative pulses using transistors, diodes and magnetic cores
High gain self steering microwave repeater for earth-satellite communications noting design, performance and results of color TV transmissions
Effects on lungs, livers, and kidneys of mice, rats, and rabbits from repeated short-term inhalation of fluorine
Portable alignment gyrocompass system accuracy, repeatability, portability, and errors
Linear repeater design for tracking and data relay satellite system
Direct current powered self repeating plasma accelerator with interconnected annular and linear discharge channels
Reversed creep tests on chemical lead, aluminum, and copper and creep deformation behavior under repeated stress reversals
Recent Monte Carlo computations, based on a speculative extrapolation of the electron spectrum, suggested that repeated scatterings contribute most of the extragalactic X-ray background around 3 MeV in a Compton model. We have redone this calculation analytically with a similar electron spectrum, but with very different results. The double-scatter contribution near 3 MeV does not exceed 1 percent and cannot improve the fit to data. The effect is largest near 1 keV but will probably not be observable.
A new multispectral data analysis procedure, based on LARSYS, has been developed which substantially reduces the influence of the analyst. The analysis is automated, including the interpretation of clustering results. The classification results obtained are repeatable and not biased by analyst subjectivity during the analysis.
A number of repeated rapid flux dropouts have been observed at 6.6 earth radii by the low-energy proton detectors on board the ATS 6 satellite during the July 4-6, 1974, geomagnetic storm period. These rapid flux changes are caused by the fact that the outer boundary of the trapped radiation region moves back and forth past the satellite. Although a tilting field line configuration can cause the boundary to pass the satellite, as has frequently been reported in the literature, the boundary is shown to be distorted by a large surface wave traveling eastward around the earth. The maximum velocity of the wave was observed to be about 40 km/s.