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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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Globally optimal solutions to impulsive transfer based on Green theorem, analyzing cost function /characteristic velocity/ as quasi-linear function of state change
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Mathematical analysis technique generalizes a root squaring and root cubing method into a general root powering method. The introduction of partitioned polynomials into this general root powering method simplifies the coding of the polynomial transformations into input data suitable for processing by computer. The method includes analytic functions.
Pathfinding algorithm for unmanned roving vehicle to explore Martian surface
Chronic acceleration effects on erythrocyte number, plasma volume, globulin fractions, erythrocyte size and plasma A/G ratio in chickens
Spacecraft sterilization requirements, evaluating viable organisms release probability from spacecraft as function of equipment fracturing
System determines the direction of arrival of an electromagnetic wave with the direction information in a readily usable form. It presents a relatively small physical structure and does not require mechanical positioning.
Illumination of rotating surface with laser beam and examination of interference patterns resulting from diffused reflections determines position of axis and direction of motion. Interference patterns are viewed through a lens or recorded on film as circular streaking patterns.
Basic objectives and requirements of Earth Resources Program
Determining initial states of inverse automaton by analysis of original automaton
Generalized Rayleigh quotients for calculating eigenvalues and eigenvectors of large matrices
Critical research events and time histories in development of innovations
Managerial practices of problem identification, discussing research study in operating division of large corporation
Laser velocimeter application to laminar-turbulent flow transition at glass tube centerline
Water vapor homogeneous nucleation in simulated spacecraft debris clouds
Algorithm for higher order loops determination in flow graph from subgraphs of linear graph model, considering circuits with ladder/nonladder structures
Electron beam for determining plasma potential and charge density as function of radius of inertially confined tenuous plasma cylinder
In a simulation of interstellar organic chemistry in dense interstellar clouds or on grain surfaces, formaldehyde, water vapor, ammonia and ethane are deposited on a quartz cold finger and ultraviolet-irradiated in high vacuum at 77K. The HCHO photolytic pathway which produces an aldehyde radical and a superthermal hydrogen atom initiates solid phase chain reactions leading to a range of new compounds, including methanol, ethanol, acetaldehyde, acetonitrile, acetone, methyl formate, and possibly formic acid. Higher nitriles are anticipated. Genetic relations among these interstellar organic molecules (e.g., the Cannizzaro and Tischenko reactions) must exist. Some of them, rather than being synthesized from smaller molecules, may be degradation products of larger organic molecules, such as hexamethylene tetramine, which are candidate consitituents of the interstellar grains. The experiments reported here may also be relevant to cometary chemistry.