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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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Characterization and mathematical representation of line scanning image systems and evaluating system performance with discrete output signal and post filtering
Mathematical models for investigating stability of thermally stratified shear flow in atmosphere
Quantitative determination of optical imperfection by mathematical analysis of Foucault knife edge test pattern in large orbiting telescope
Dynamic mathematical model of physiological regulation of body temperature in human beings
Mathematical model of DSIF Doppler tracking system phase noise
Compilation of papers on applications of mathematics and computer programs for industry related problems
Mathematical and mechanical models of human thermal system thermodynamic/transport processes and external regulation devices for single elements and entire body
Ion thrustor ion beam current density profiles mathematical representation by two parameter equation
Mathematical model of arc Pioneer 6/7 plasma probe electrostatic analyzer responding to monoenergetic unidirectional charged particle beam
Mathematical model for underwater simulation of astronaut extravehicular activities in weightless conditions, using computer program
Meteorological rocketsonde film mounted thermistor bead temperature sensor, developing mathematical model for thermometric correction formulas in automatic data processing
Stochastic, random and ordinary Green function relations for two point correlation functions in mathematical physics
Development of methods for predicting operational readiness of complex systems based on probability theory is discussed. Operational readiness of systems is defined and mathematical relationships involved in determining readiness are presented. Example of reliability engineering and quality control is included.
Selected articles concerned with mathematical or simulation models of human thermoregulation are presented. The articles presented include: (1) development and use of simulation models in medicine, (2) model of cardio-vascular adjustments during exercise, (3) effective temperature scale based on simple model of human physiological regulatory response, (4) behavioral approach to thermoregulatory set point during exercise, and (5) importance of skin temperature in sweat regulation.
A radiation transfer model was modified to include semitransparent and opaque layers as well as molecular constituents. An example of the use of the program and an analysis of the mathematical model are included.
Based on general mass continuity and diffusive transport equations, a mathematical model was developed that simulates the transport of water in Bacon and alkaline-matrix fuel cells. The derived model was validated by using it to analytically reproduce various Bacon and matrix-cell experimental water transport transients.
Mathematical models are developed for calculating heat-transfer limitations of high-temperature heat pipes and heat-transfer limitations and temperature gradient of low temperature heat pipes. Calculated results are compared with the available experimental data from various sources to increase confidence in the present math models. Complete listings of two computer programs for high- and low-temperature heat pipes respectively are appended. These programs enable the performance of heat pipes with wrapped-screen, rectangular-groove or screen-covered rectangular-groove wick to be predicted.
Two static mathematical models of the open or Dungey model of the magnetosphere are constructed. The process of construction is similar to that for early closed magnetosphere models, such as the Taylor-Hones model. The first model in fact is simply an addition of an interplanetary field in arbitrary direction to a Taylor-Hones image dipole model. In order to preserve the shape of the magnetosphere at high latitudes, and to partially exclude the exterior field, another model is constructed with the magnetopause approximated by a diamagnetic sphere. We find that there are some interplanetary field lines connected to the earth for all orientations of the interplanetary field other than strictly northward, and that the maximum number of connected field lines occurs with a due southward field. For an average spiral hose angle of the interplanetary field, the dayside neutral point occurs on the magnetopause at about 10 o'clock local time. Dayside auroras, convection patterns, and other phenomena may exhibit symmetry about this local time. For a positive (negative) interplanetary field sector, energetic, anisotropic particle fluxes should have direct access to the northern (southern) polar caps, as is supported by many recent observations.