SUSAN A. AMBROSE is Director of the University Teaching Center and Lecturer in the Department of History at Carnegie Mellon University. She grew up in Belle Vernon, Pennsylvania, just south of Pittsburgh. Ambrose received her B.A. degree (1979) in political science and her M.A. (1981) in history from Indiana University of Pennsylvania, and her doctorial degree (1986) in American history from Carnegie Mellon University. At Carnegie Mellon, she has created faculty and graduate student development programs and conducted seminars for faculty in colleges and universities throughout the United States and Canada. Ambrose has made presentations at regional, national, and international conferences on issues around faculty and graduate student development, and has publications in those areas. She also teaches courses on immigration and ethnicity.

CLIFF I. DAVIDSON is Professor of Civil Engineering and Engineering and Public Policy, and is Director of the Environmental Institute, at Carnegie Mellon University. He grew up in Des Moines, Iowa. Davison received his B.S. (1972) in electrical engineering from Carnegie Mellon, and his M.S. (1973) and Ph.D. (1977) in environmental engineering science from California Institute of technology. In addition to publishing and lecturing widely on environmental topics, he is on the editorial boards of three journals and has been a member of more than a dozen governmental committees. He currently serves on the Board of Directors of the American Association for Aerosol Research. He has taught both undergraduate and graduate course since 1977.