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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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Egocentric localization of visual horizontal in normal and labyrinthine defective observers for various head and body tilts
Defects in quenched and aged platinum, using electron and field ion microscopes
Hand-operated tool repairs weld defects in large-diameter, thin-walled stainless steel tubes. Tool consists of a three-roll external planisher and an internal backup mandrel, both hydraulically pressurized by hand pumps, and an external restraining mandrel, which keeps the tube from turning during the planishing operations.
Study shows the pulse-height degradation of gamma ray spectra in germanium/lithium detectors to be due to electron interaction in the dead layers that exist in all semiconductor detectors. A pulse shape discrimination technique identifies and eliminates these defective pulses.
Ultrahigh vacuum X ray analysis of surface defects of metal single crystals due to ion bombardment
Static firing tests to reduce glass fiber defects and to improve field repair work on X-248 rocket motor cases
Static firing tests to reduce glass fiber defects and to improve field repair work on X-248 rocket motor case - Supporting tables and figures
Static firing tests to reduce glass fiber defects and to improve field repair work on X-248 rocket motor cases - Inspection, repair and firing data
Disordered regions in electron irradiated silicon noting defect clusters concentration effect on electrical properties
Ionizing radiation-initiated degradation of deoxyribonucleic acid in bacteria, noting role of defective prophage
Li atoms and O interactions with electron radiation produced defects in Si studied by IR spectroscopy
Annealing temperature of radiation defects in phosphorus doped silicon, discussing isochronal recovery characteristics of solar cells with different donor and oxygen concentrations
CoO complex defects indicated by negative enthalpy of formation, considering isobaric electrical conductivity measurements at various temperatures and oxygen pressures
Defective bacteriophage PBSH in Bacillus subtilis after mitomycin C treatment, showing DNA synthesis and marker frequency change
Ti and V sesquioxides and TiO-VO solid solutions crystallography and defect chemistry over entire range of compositions
Point defects were introduced into specimens of three heat-treated tempers of alloy 7075 by neutron irradiation. Continuous ultrasonic monitoring allowed crack growth to be observed. Effects on stress-corrosion susceptibility, elongation, hardness, and yield strength are noted and compared for the three tempers.
Production and annealing of defects in lithium diffused silicon after electron irradiation