Gilbert F. Orr: Chair, Associate Professor of Mathematics; BA, St. John's University; MS, Ph.D., University of Miami. Joined USC in 1977. Professional interests including finite ring theory, ordered algebraic systems, and universal algebra. David L. Spenny: Professor of Physics; B.S., Wittenberg University; Ph.D. , University of Colorado. Joined USC in 1980. Professional interests include science education, optics, nuclear spectroscopy, and science for non-scientists. During vacations he can usually be found hiking down a desert canyon. e-mail Dr. Spenny Marta J. Wallin: Associate Professor of Physics; B.S., Jagiellonian University, Krakow, Poland; Ph.D., University of Wyoming. Joined USC in 1987. Professional interests include dielectric properties of composites and science education. Take a weekend walk in the Colorado Rockies and you are likely to run into her.  e-mail Dr. Wallin  Stephen Wallin: Adjunct Professor of Physics; B.S. Illinois Institute of Technology; Ph.D., University of Wyoming 1985; Professional interests include science education (all levels including special science ed.), physics in everyday experience, waves, electromagnetism. You may also see Dr. Wallin hiking or walking outdoors with his family.