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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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Suboptimal closed loop control of nonlinear systems subject to quadratic performance indices by invariant imbedding concepts and maximum principle
Validity of Lorentz invariance, discussing nuclear magnetic resonance test on torque for spin of electrons, muons and neutrons
Invertibility of linear time invariant dynamical control systems, discussing L-inverses, sequential circuits, inherent integration, reproducibility, pointwise and functional inverses
Invariant imbedding technique applied to electromagnetic wave propagation through inhomogeneous reentry plasmas
Rotation invariant probability distributions in geodesy and covariance of gravity anomalies above spherical surface
Thermodynamic aspects of ray invariance of spectral brightness ratio to square of local index of refraction compared to black body power radiation
Lorentz invariance test using bar magnet on torsion fiber, analyzing preferred reference frame in space assuming earth velocity coupled to electron spin through specific term
Invariant set existence inside submanifold convex to flow established from vector field properties on submanifold boundary
Compton-Getting effect for cosmic ray particles and photons and Lorentz-invariance of distribution functions, discussing thermal background radiation, proton spectra, etc
Cramer-Rao efficiencies of best linear invariant estimators, using Weibull distribution in model for survival populations connected with life testing
Invariance conditions and state transition matrix of linear systems
Turbulent chemical reactions invariance preservation for zero diffusivity
Determining optimal time-invariant output feedback controllers for linear dynamic systems
Input-output properties of feedback systems based on linear time invariate systems
Developmental history of adiabatic invariance including contributors to radiation energy transfer and celestial mechanics concepts
Feedback compensator for linear-time invariant system insensitive to parameter variations
Empirical approach to third-invariant violation for radial diffusion of outer zone electrons
Stability of linear time invariant discrete systems including multiple poles