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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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Critical current density of neodymium-titanium alloy samples is analyzed from magnetization curves to determine the ac properties of hard semiconductive materials. A complete family of magnetization curves is obtained, each curve representing performance at a different temperature.
FORTRAN 4 digital computer program calculates equilibrium composition of complex, multiphase chemical systems. This is a free energy minimization method with solution of the problem reduced to mathematical operations, without concern for the chemistry involved. Also certain thermodynamic properties are determined as byproducts of the main calculations.
Emission spectrographic method determines trace amounts of inorganic impurities in potable water. The capability of this innovation should arouse considerable interest among plant biologists, chemists working in organic synthesis, and pathologists.
Radioactive krypton adsorption technique is used to determine the surface area of more than one sample of material simultaneously.
Wind tunnel studies of six cones for pressure probes to determine Mach number, total pressure and flow angles
Fatigue testing and determination of low temperature properties of structural metal alloys - aluminum alloy, stainless steel, and nickel alloys
Synthetic simultaneous observations for determining fixed-earth oriented directions between Baker-Nunn camera stations
Determination of solar extreme ultraviolet emission altitudes by using earth as occulting disk
Application of statistical mechanics of nonequilibrium processes to astrophysics and determination of galactic mass distribution and gravitational potential
Apparent movement phenomena on cathode ray tube displays - threshold determinations of apparent movements of pulsed light sources
High altitude measurement to determine ratio of deuterium to hydrogen in solar atmosphere - Fabry-Perot interferometer
Morse potential function used to approximate pair interaction potential for wide variety of hydrocarbons determined from viscosity and second virial coefficient
Fracture toughness and resistance determined for large steel structures using stress intensity calculations - fracture mechanics
Theoretical determination of electric field strength of contact gap - thermionic emission of electric contact and ionization temperature
Thermal property analysis of connector contacts to find basic electric parameters, and to determine norms for contact and transitional resistance valve
Root mean square height of rough surface determined by measuring correlation between two scattered radar waves at different frequencies as function of frequency separation
Use of accelerometer-equipped spherical penetrometers to determine capability of dust materials to support bearing loads
In-flight test to determine space environmental effects on friction, wear, and lubrication of materials - proposed modular system