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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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Integral manifolds of third order autonomous differential equations with unstable equilibrium point, investigating forward and negative asymptotic problems
Carbon in austenite derived for composition dependence of diffusivity using first order mixing statistics
Stationary phase error variance for second order phase locked loop for low signal to noise ratios
Comparative sets of higher order adiabatic motion equations for plasmas in electric and magnetic fields with slow variations
The well-known technique of detecting binary pulses in white noise and unknown dc drift by means of a high-pass filter followed by a bit-by-bit detector is not theoretically optimum. The optimum procedure is shown to require a rank-ordering operation on the received data.
Electron paramagnetic resonance of Mn ions in single crystal and powder forsterite, testing heat treatment and proton irradiation effect on ordering
Fe ion, Mg order-disorder in natural orthopyroxenes as function of temperature
Fe rich Fe-Al alloys single crystals, determining three dimensional order and atomic displacements coefficients by X ray diffuse scattering
Closed form expressions for linear and higher order corrections to multiimpulse approximations of space flight trajectory optimization solutions, using bang-bang thrust control
Recursive differential equation for moments of time-to-cycle slip in first and second order phase lock loops
Aerodynamic forces on flexible launch vehicles and missiles in supersonic flight based on first order method, solving boundary value problem for surface velocities
Fifth-order pseudo-Runge-Kutta methods for numerical solution of ordinary differential equations, determining optimal parameters
Performance characteristics of higher order approximations of Runge-Kutta type are analyzed, and performance predictors for time required on machine and for error size are developed. Technique is useful in evaluating system performance, analyzing material characteristics, and designing inertial guidance and nuclear instrumentation and materials.
Preparation of ordered poly/arylenesiloxane/ polymers
Second order artificial satellite theory based on intermediate orbit
Applications of partial orderings to study of positive definiteness, monotonicity, and convergence of iterative methods for linear systems
Applying generalized phase shift approach to rotational excitation problem to atom-rigid rotor case in first order approximation
First order wave function in 1/Z expansion