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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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Initial value problem for singularly perturbed differential-difference equation which is scalar, linear and has constant coefficients
Singular nonself-adjoint differential operator of second order eigenvalues
Extension of problem of singular perturbation for linear scalar constant coefficient differential- difference equation with single retardation to several retardations, noting degenerate equation solution
Von Laue and Cowley diffraction theories of coherent diffuse X-ray scattering from random alloys, predicting diffuse intensity singularities at reciprocal lattice points
Singularities of electromagnetic field in nonuniform, magnetoactive plasma
Asymptotic expansion method for solving certain classes of singular perturbation problems with application in viscous flow
Optimality of totally singular vector controls governing dynamical systems and extension of Green theory approach to higher dimensions to evaluate optimality of such controls
Matrix method for predicting singular lines in parameter plane
Approximate solution of system of singular integral equations
Initial value radial heat problems structure and behavior solved with singular data
Algorithm for optimal singular control based on bounded state variables
Singular fifth order Runge-Kutta solution conditions for differential system
Optimal thrust programming of single stage rocket vehicle for maximum payoff at end conditions using Lagrange multipliers for singular arc
Minimality of singular arcs over short intervals of time, discussing interrelationships between second variation test and transformation approach to subarcs
Scalar wave scattering and absorption by Schwarzschild singularity, discussing cosmological implications
Radial momentum transfer rate gradient singularity near contact discontinuity in theory of interplanetary blast waves
Singular lines in parametric plane, discussing existence, equations and self adaptive designs
Singular line adaption for parameter plane equations for adjustment to conditions requiring feedback control