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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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Pathological effects of streptomycin sulfate on semicircular canal functions in squirrel monkeys - aerospace medicine
Quarter-wavelength chokes are mounted on the coaxial line of an antenna structure to prevent induced spurious currents from affecting the antenna radiation frequency pattern. The choke-absorbent combination approximately doubled the usable frequency range for the antenna system studied.
Sound suppressor models for exhaust jets of large rocket engines
Program for perceived noise levels reduction on ground of turbofan-powered commercial transport by acoustically absorptive lining of ducts
Plane wave disturbances in infinite rotating collisionless system for wave vector normal to axis of rotation
Visibility in warm fog produced in cloud chamber by seeding with sodium chloride particles, with application for aircraft landing clearance
Computerized simulation of high frequency instability in gas in liquid propellant rocket engines
Injector baffles for flame stability in combustion chambers using nitrogen tetroxide and hydrazine mixture
Program for perceived noise levels reduction on ground of turbofan powered commercial transport by acoustically absorptive lining of ducts
Oscillation dampers for tall flexible structures, describing wind tunnel studies of Saturn 5 aeroelastic model
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Technique using photodielectric effect of semiconductor in high-Q superconductive cavity gives initial improvement of 2-4 db in signal-to-noise enhancement of conventional RF communication systems. Wide band signal plus noise can be transmitted through a narrow-band cavity due to parametric perturbation of the cavity frequency or phase.
Bending mode vibratory response of supported and sleeved ducts with fatigue and alloy studies
Measurement of thermal accommodation coefficients between liquids and high temperature gases in low pressure reentry communications blackout intervals
Stiles-Crawford effect measurements before and following eye movements to determine retina shearing during eye movements
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Addition of various tetraalkyl quarternary ammonium salts, to alkaline zincate electrolyte of cell, prevents formation of zinc dendrites during charging of zinc electrode. Electrode capacity is not impaired and elimination of dendrites prolongs cell life.
Circuitry requires modulated subcarrier to be split, part going to a phase modulator, and part going to a new circuit which utilizes a square law detector, a balanced mixer, and an amplifier to remove spurious sidebands. A summer recombines the two outputs, and final signal no longer includes spures.