Composition of interstellar grains
Meteoritic graphite, silicon carbide and silicates to explain observed interstellar grains properties
Gilra, D. P.↗
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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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Measurements of the refraction and diffraction of a short N wave by a gas-filled soap bubble
Short N wave refraction and diffraction by gas- filled soap bubble, discussing measurements to explain peaking and rounding in sonic boom pressure signature
Blackstock, D. T.↗
Vibrational analysis of the infrared and Raman spectra of oxalyl bromide in the crystalline and fluid states
IR and Raman spectra vibrational analysis of crystalline and fluidic oxalyl bromide, explaining observations by two geometrical isomers existence
Baglin, F. G.↗
Adsorption on the Martian regolith
Mars regolith carbon dioxide, water and Kr adsorption, explaining diurnal brightness phenomena
Cannon, W. A.↗
Glazed lunar rocks - Origin by impact
Glazed lunar rocks, explaining origin as result of nearby meteoritic impact
Anders, E.↗
Thermal emission from grains in the galactic center
Galactic nucleus thermal emission due to dirty ice or silicate grains, explaining far IR radiation power output and spectral dependence
Krishna Swamy, K. S.↗
The influence of heavy doping on the emitter efficiency of a bipolar transistor
Bipolar junction transistor doping effects on bandgap decrease and emitter efficiency, explaining current gain temperature dependence
De Man, H. J. J.↗
Lubricant selection for gear designers
Guide for gear designers, consisting of theory, calculations, charts, curves and references, explains lubrication requirements for gears to insure maximum performance. Mechanical and service variables are considered in order to obtain optimum gear performance under severe operating conditions.
Townsend, D. P.↗
Broadband RF-distribution amplifier
Radio frequency amplifier to distribute reference frequencies within communications systems and provide automatic gain control with low phase distortion is described. Use of photocell in electronic circuit to produce desired conditions is explained. Operation of entire amplifier circuit is analyzed.
Lutes, G. F., Jr.↗
Thermally stable structural framework
Development of structural framework with zero or negligible thermal expansion is discussed. Combination of two types of metallic materials in binary trellis to compensate for thermal expansion is explained. Construction details are presented and illustration is included.
Schuerch, H. U.↗
Dual redundant core memory systems
Electronic memory system consisting of series redundant drive switch circuits, triple redundant majority voted memory timing functions, and two data registers to provide functional dual redundancy is described. Signal flow through the circuits is illustrated and equence of events which occur within the memory system is explained.
Hull, F. E.↗
Flow equation for porous plug and capillary tube flow restrictors
Development of flow measuring apparatus for determining low flow performance of resistojet thruster is discussed. Diagram of test equipment is presented. Operation of test equipment is described and numerical relationships are explained.
Davis, W. S.↗
Cutting thin sections of bone
Medical equipment for obtaining repetitive planoparallel sections of bone to study healing of bone structure under high gravity stress is described. Device consists of modified saw with diamond cutting edges. Construction of device and manner of use are explained.
Ashley, W. W.↗
Control of oscillations in a discharge circuit
Development of electric discharge circuit damping element which increases in resistance with current and time is described. Damping element is resistor made of tungsten wire which has large resistance-temperature coefficient. Specifications of tungsten resistor and incorporation into circuit are explained.
Cheng, D. Y.↗
A simple tachometer circuit
Electric circuit to measure frequency of repetitive sinusoidal or rectangular wave is presented. Components of electric circuit and method of operation are explained. Application of circuit as tachometer for automobile is discussed.
Dimeff, J.↗
Thermally resistant polymers for fuel tank sealants
Conversion of fluorocarbon dicarboxylic acid to intermediates whose terminal functional groups permit polymerization is discussed. Resulting polymers are used as fuel tank sealers for jet fuels at elevated temperatures. Stability and fuel resistance of the prototype polymers is explained.
Webster, J. A.↗
Nondestructive testing for braze voids in thin panels by use of special coatings
Application of commercial coating to exterior of sandwich panel structures for determining presence of voids in brazed plates is discussed. Procedure for applying coating material and method of conducting nondestructive tests are explained. Illustrations are included to show appearance of voids.
Gibson, J. C.↗
Cavitation data for hydraulic equipment
Development of cavitation B-factors for helium, parahydrogen, nitrogen, fluorine, oxygen, refrigerant 114, and water is discussed. B-factor is defined and numerical relationships are established. Mathematical models are included and alternative methods of determining B-factor are explained.
Hord, J.↗