Useful Links

Research Interest:

Mathematical Theory of Plasma Oscillations ("Quasi Periodic Oscillations" - QPOs) in the Plunge Region of a Black Hole, Strange (Quark) Star, or Neutron Star; Top Resonance/ Complex Scaling Method of Resolving Long-Lived Waves in Quantum Mechanics or in General Relativity; Wave Equation Formulation of the Equations of General Relativity; One-Electron Orbitals, Occupancies and Energies of Many-Electron Quantum States in Atoms and Molecules.

Dr. Orville Day

  • Professor Emeritus
  • PhD., Brigham Young University, 1973
  • Email:


Day, O. (2005).  Stable stationary vortices and traveling oscillatory vortices in a stenotic fluid-flow channel.  Physical Review E, 72, 067303 : 1 - 5.  

Day, O. W. Jr., Pravica, D. W., "Top Resonances in the Gravitational and Electromagnetic Fields Surrounding a Black Hole: A model for Understanding High-Frequency QPOs",AAS Bull.36, No. 3. 1716 (2004).

Pravica, D. W., Day, O. W. Jr., and Brock, R. S., "Methods, System, and Computer Program Products for Analyzing Cardiac Sounds Using Eigenfunctions", United States Provisional Patent Application No. 60/543.037, February 9, 2004.

Day, O. W., Jr., and Pravica, D. W., "Listening For Long-Lived Breathing Modes of Compact Objects",AAS Bull.35, No. 2, 1901 (2003).

Morrison, R.C.,  Mizell, J. R. Jr., and  Day, O. W. Jr., "Generalized overlap amplitudes for the lithium atom.",Inter. J. Quan. Chem.,57, 355(1996).

Day, O.W. Jr., "The extended Koopmans' theorem Fock operator and the generalized overlap amplitude one-electron operator.",Inter. J. Quan. Chem.,57, 391(1996).

Morrison, R.C., Tong, W., and Day, O. W. Jr., "Chemical bonding in the hydrogen molecule.",Inter. J. Quan. Chem.,60, 421 (1996).

Tong, W.,  Morrison, R. C., and Day, O. W. Jr., "Analysis of chemical bonding in C2 using Dyson orbitals.",Inter. J. Quan. Chem., Quan. Chem. Symp.30, 411 (1996).

Day, O. W. Jr., "A local one-electron operator for the generalized- overlap amplitudes.",Inter. J. Quan. Chem.,56, 547 (1995).