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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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Approximation optimal trajectories - selection of estimation variables in least squares program, and computer program application
Bethe-Peierls-Weiss cluster approximation and model for ferromagnetic thin films
Finite-density zero-pressure models of universe based on general relativity theory - approximate solution for luminosity distance
Radial distribution functions for fluid particle interactions with pairwise radial forces approximated for three potential models
Approximation method for solving singe-degree-of- freedom differential roll equation with time dependent coefficient - ballistic trajectory anallysis
Sudden approximation for calculating transition probabilities for energy transfer during collisions between molecules and atoms
Flight performance estimate by approximations to motion equations
Method of approximating propellant requirements of low thrust trajectories
Approximations for force-deflection properties of aircraft tires
Approximation method for orbital transfer propulsion system requirements in central force field
Thermodynamic properties and approximation method for viscoelastic materials
Stationary phase approximations on differential cross section expansion for elastic particle scattering mechanics
Approximation methods for computation of plane wave propagation through nonuniform dielectric slab, for scattering by nonuniform dielectric cylinder, and for conducting cylinder
Derivation of second approximation shell theory
Orthonormalization procedure for multivariable function approximation
Location and nature of singularity of Ising square lattice susceptibility, using Pade approximation based on Clapp spin-spin correlation function
Nonsimilar solution of incompressible boundary layer over flat plate in presence of shear flow, using approximate method
Hartree-Fock approximation method for calculating efficiencies of multiple-photon processes