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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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A convenient, three-step fabrication process, with a p-type layer of gallium arsenide vapor deposited on a starting wafer of germanium, is used to produce heterojunction-homojunction p-n-p transistors. These are of high quality with good injection efficiency and low capacitance.
History of science and technology - aircraft, rockets, and space flight
Functional relationship between performance and cost of launch vehicles
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Cost effectiveness of electrical propulsion for logistic support of advanced lunar operations
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Cost comparison of perlite and multilayer aluminum foil relective insulation in liquid hydrogen storage dewars for M-1 engine
Construction technique for welded cordwood electronic module fabrication
Cost structures in research facilities to establish cost or efficiency criteria for spatial allocation of funds, and decentralized decision making
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Explore the source record for details and available documents.
Explore the source record for details and available documents.
Testing device utilizes the change in pressure about a bias or reference pressure level produced by displacement of a center-driven piston in a closed cylinder. Closely controlled pneumatic pressure waves allow testing under dynamic conditions.
Recapitulation of processes and data sources used in deriving intelsat system requirements through 1975
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Simple and inexpensive method produces iodine 123, in a conventional cyclotron. Tellurium 122, a stable isotope available in enrichments exceeding 95 percent, is held on a porous metal plate by a flowing stream of helium and bombarded with either alpha particles or helium 3.
Navigation and traffic control satellite network development
Orbiting satellite global all-weather oceanographic data acquisition to complement higher resolution data from ships, buoys and aircraft remote sensors