W. Steven Gray received the B.S. degree in electrical engineering from Purdue University, West Lafayette, IN, in 1983, the M.S. degree in electrical engineering, the M.S. degree in applied mathematics, and the Ph.D. in electrical engineering from the Georgia Institute of Technology, Atlanta, in 1985, 1988, and 1989, respectively. He is currently with the Electrical and Computer Engineering Faculty, Old Dominion University, Norfolk, VA. His research interests include modeling and control theory for nonlinear systems.