Solar wind conditions leading to efficient radiation belt electron acceleration: A superposed epoch analysis
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Analysis of electron and ion density measurements obtained with rockets suggests simple model of the quiet ionosphere
Electron microscope analysis of micrometeoroid particle size distribution on sampling surfaces recovered from space with Luster sounding rockets
Electron microscopic analysis of particles caught by sounding rockets for extraterrestrial origin
Irreversible quantum statistics for electron mobility analysis in low temperature helium
Electron microprobe analysis of potassium feldspar in Weekeroo Station meteorite
Network analysis for systems application program /NASAP/ in FORTRAN for batch and on-line analysis of electronic circuits
Ivory Coast microtektites chemical composition from electron microprobe analysis
Enstatite chondrites and achondrites electron microprobe analysis for Si, P and Ni in metal grains and associated schreibersite and perryite
Electron microprobe analysis of fine-grained igneous rocks from lunar sample 10022 from Sea of Tranquillity
Oxidation of nickel alloys determined by X ray diffraction, weight and thickness change measurements, and electron microprobe analysis
Flanged australite and australasian microtektites chemical compositions, using electron microprobe analysis
Petrographic microscope and electron microprobe analysis of Apollo 12 rock 12013, noting bimineralic composition with dominant potassic feldspar plus silica
Electron microprobe analysis of cavity surface and lip of cosmic dust impact craters in stainless steel plates exposed at 400 km altitude in Gemini S-010 experiment
Apollo 11 and 12 fines cosmogenic He, Ne and Ar radionuclides composition determination, using electron microprobe analysis
The alloys Ni3Al and NiAl with and without 1 and 3 atomic percent chromium, silicon, and titanium replacing the aluminum were cyclically oxidized at 1200 C for times to 200 hours, and the results were compared with those obtained with the alloy B-1900 subjected to the same oxidation process. The evaluation was based on metal recession, specific weight change, metallography, electron microprobe analysis, and X-ray diffraction. The oxidation resistance of Ni3Al was improved by Si, unaffected by Ti, and degraded by Cr. The oxidation resistance of NiAl was slightly improved by Ti, unaffected by Si, and degraded by Cr. The oxidation resistance of Ni3Al with 1 atomic percent Si was nearly equal to that of NiAl. Alloy B-1900 exhibited oxidation resistance comparable to that of Ni3Al + Cr compositions.
The television housing and a section of the strut of the radar altimeter and Doppler velocity sensor were examined optically and with a scanning electron microscope for particulate impacts. The white surface of the camera was discolored during the months the Surveyor 3 was on the moon; however, most of the craters must have occurred as a result of lunar dust sandblasted by the LM exhaust. The polished section of the strut exhibits contamination which appears brown and seems to be partially composed of crystals. Electron microscopic analysis of the strut section indicated no craters of hypervelocity impact origin, confirmed pitting density results of the optical scans, and indicated that material in the craters is of lunar origin. No meteorite impacts larger than 25 microns were detected on the tubing section.