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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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Nonrelativistic energy of excited vibrational state of molecule calculated in adiabatic approximation shown to be upper bound to exact nonrelativistic energy
Second approximation for evaluating local radiant flux and temperature of opaque surfaces in space environment
Analytic approximations for application to spacecraft optical navigation system where position fixes are taken over short trajectory arcs
Closed form rational approximations to Tricomi psi function
Sample sizes for approximate independence of largest and smallest order statistics
Existence theorem using Pade approximation and matrices
Parameter estimation of sampled data control systems by stochastic approximation
Anisotropic Heisenberg ferromagnets in random phase and spin wave approximation
Approximative three dimensional solution for crack in elastic plates
Digital approximation in statistical estimation
Approximation for mean and standard deviation of magnitude of statistical velocity correction vector
Probability limit theorems and convergence of finite difference approximations of partial differential equations
Coulomb approximation for dipole and quadrupole transitions, calculating tables for radial matrix elements
Eddington approximation to solve radiative transfer equation
Asymptotic constitutive approximations for rapid finite deformation of general viscoelastic materials, noting isotropic solids and fluids
Energy distribution among products of reactive collision of atomic H with Br molecule yielding HBr and Br atom, using perturbed Morse oscillator approximation
Approximation for discretization error of discrete analog of Bergman harmonic kernel, discussing discretization error in Dirichlet and Neumann problems for Laplace equation
Atomic hydrogen-bromine linear collision reaction intermediate formation and reactive scattering cross sections quantum mechanical calculation, using perturbed Morse oscillator approximation