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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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Compensatory tracking task to measure human operators time delay characteristics and tracking ability
Data-compression processing systems based on an analog-to-digital converter /ADC/, includes a qualitative comparator for comparison of the ADC output with a ramp generator, which is connected as a bidirectional binary counter with selective inputs. A bidirectional ramp counter selects the proper ramp through a ramp generator selection network.
Singular perturbation problems for partial differential equations
Density, electric field and volt-ampere characteristics for spherical electrostatic Langmuir probe in collision plasma with weak ionization and recombination, using asymptotic method
Density, electric field and volt-ampere for characteristics spherical electrostatic Langmuir probe in collision plasma with weak ionization and recombination, using asymptotic method
Propagation and internal equilibrium structure of Alfven wave which conserves magnitude of magnetic field component
Infinite power series to solve perturbation equation for ground state of helium atom
Report on numerical methods of integration includes the extrapolation methods of Bulirsch-Stoer and Neville. A comparison is made nith the Runge-Kutta and Adams-Moulton methods, and circumstances are discussed under which the extrapolation method may be preferred.
Mathematical model for chromatographic systems for Mars exploration
Gravitational and magnetic torque effect on rotational motion of triaxial rigid body in regressing orbit about oblate primary mass
Geodetic satellites transfer between low ellipticity orbits by microthrust
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Afferent and efferent fibers in vestibular part of statoacoustic nerve
Center of mass small displacement effects on satellite orbits by solving variational equations for scalar potential function employing matrix formalism
Phase locked-loop tracking with sine wave modulation in Apollo communication systems
Equations of motion for rotating gravity gradiometer, developed for forced harmonic oscillator model
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Center of mass/center of figure offsets are known for the earth, moon, Mars and Venus. Such an offset requires a density distribution asymmetric about the center of mass. Observational evidence indicates that the terrestrial, lunar and Martian offsets result from crusts of variable thickness rather than lateral density inhomogeneities and that the thickness variations are more likely caused by internal convection than impact.