Principles of general covariance in its various formulations and the related problems of the role of coordinates in general
Covariance groups and role of space-time coordinates in relativity theory
SEARCH · Engineering Papers
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.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Covariance groups and role of space-time coordinates in relativity theory
Correspondence of group of permutations on three letters to proper rotations of three-dimensional orthogonal frame
Relationships between geographic and inertial coordinates of position
General planetary perturbations in rectangular coordinates
Consistency of subtraction technique for calculating gravitational mass in nonquasi- rectangular coordinates from surface integrals provided by von Freud superpotentials
Retarded observer time as coordinate in relativistic spherical hydrodynamic equations prevents Schwarzschild surface formation
Tesseral harmonics of coordinates using Baker- Nunn data and geopotential and dynamical procedures, noting iterative cycle for correction determination
Magnetic coordinate definitions and relation to parameters of geomagnetically trapped particles
Analytical drafting curves provide explicit mathematical expressions for any numerical data that appears in the form of graphical plots. The curves each have a reference coordinate axis system indicated on the curve as well as the mathematical equation from which the curve was generated.
Partial wave expansion in spheroidal coordinates for diatomic molecules
Corrections to Smithsonian astrophysical observing station coordinates and nonzonal harmonics from combination of dynamical and geometrical method
Eckert-Brouwer orbit correction formula in general perturbations theory, expressed in rectangular coordinates and variation of astronomical elements, applied to planetary theory
Canonical transformation to investigate rotational motion of uniaxial orbiting rigid body influenced by gravity gradient torque
Longitudinal and lateral axes orientation of uniformly rotating or rapidly rotating vehicle utilizing outputs from solar sensors and lateral magnetometer
Damped least squares method for kinematic synthesis of plane curves described by paired coordinates for four-bar linkage mechanism
Tesseral harmonics of coordinates using Baker- Nunn data and geopotential and dynamical procedures, noting iterative cycle for correction determination
Field equations for spreading resistance of variable capacitance diode and point contact variable resistance diode derived in terms of frequency, material characteristics and physical parameters
Spheroidal coordinate method for obtaining gravitational potential of oblate planet