Institute of Geophysics and Planetary Physics, University of California, 405 Hilgard Ave., Los Angeles, CA 90095-1567, United States ; Department of Mathematics and Physics, Azusa Pacific University, 901 E. Alosta Ave., Azusa, CA 91701-7000, United States
Department of Physics and Pre-Engineering, Delaware State University, 1200 DuPont Highway, Dover, DE 19901, United States ;
Department of Physics and Pre-Engineering, Delaware State University, 1200 DuPont Highway, Dover, DE 19901, United States
Department of Mathematics and Physics, Azusa Pacific University, 901 E. Alosta Ave., Azusa, CA 91701-7000, United States
Department of Mathematics and Physics, Azusa Pacific University, 901 E. Alosta Ave., Azusa, CA 91701-7000, United States
Department of Mathematics and Physics, Azusa Pacific University, 901 E. Alosta Ave., Azusa, CA 91701-7000, United States
Department of Mathematics and Physics, Azusa Pacific University, 901 E. Alosta Ave., Azusa, CA 91701-7000, United States