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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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Systems design and guidance and control analyses of thrust vector control systems for large, solid propellant launch vehicles
Immunological and enzymological approaches to evolution of enzymes and nucleic acids
Comparison of mixed and isolated flow methods for cooled turbine performance using two simplified example turbines
Viscosity and nuclear magnetic resonance studies of vinyl aromatic polymer solutions
Physiological responses of animals exposed to ozone, carbon tetrafluoride, and nitrogen oxide
Comparsion of heat rejection systems for portable life support equipment for earth orbital or lunar surface EVA
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Unconstrained minimization techniques efficiency in mathematical nonlinear programming, discussing gradient and variable metric types
Chemical analysis for Li, Na, K, Rb, Cs, Ca, Sr and Ba in achondrites and Apollo 11 lunar rocks, breccia and soil samples
Radar scattering law derivation method for small regions of Venus surface, synthesizing CW spectra
Axisymmetric inlet design for turboramjet powered hypersonic cruise vehicle, examining effects of spillage and cowl drags on air flow characteristics
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Techniques for using electrical probes for plasma diagnostics are reviewed. Specific consideration is given to the simple Langmuir probe, the symmetric double probe of Johnson and Malter, the variable-area probe of Fetz and Oeschsner, and a floating probe technique. The advantages and disadvantages of each technique are discussed.
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Identification of the failure mechanism characteristic for the more widely used carbon fibers in epoxy matrices under tensile loads as an aid toward improvements and more reliable predictions of the performance of these composites. The presented results pertain to high-strength, high-modulus, and low-modulus fibers in unmodified and modified epoxy novolac matrices.
Isolation and definition of specific response components in pupil reflexes through comparison of the dynamic features of light-induced and accommodation-induced pupil movements. A quantitative analysis of the behavior of the complex nonlinear pupil responses reveals the presence of two independent nonlinear characteristics: a range-dependent gain and a direction dependence or movement asymmetry. These nonlinear properties are attributed to motor processes because they are observable in pupil responses to both light and accommodation stimuli. The possible mechanisms and consequences of these pupil response characteristics are quantitatively defined and discussed.
Tests were performed on 12 cooling patches of various designs to establish criteria for the evaluation of their performance in liquid-cooled suits in industrial, military and aerospace applications. The thermal effectiveness value was 0.088 for patch designs with a double spiral flow pattern, and 0.075 for patch designs with a parallel flow pattern. The ratio of thermal energy transfer rate to cooling-medium pumping power requirement is indicated as the prime performance characteristic to be considered in the selection and rating of cooling patches.