Douglas C. Neckers is a McMaster Distinguished Research Professor and Executive Director of the Bowling Green State University Center for Photochemical Sciences.  He received his PhD from the University of Kansas in 1963, and is the recipient of various awards and honors, including the 1999 InterAmerican Photochemical Society Award  for Outstanding Research.  His work includes researching and developing new photopolymerization systems and understanding the molecular details of how polymerization occurs after the absorption of light.  He has served as Series Editor of Advances in Photochemistry since the publication of Volume 17 in 1992. William S. Jenks is a Professor in the Department of Chemistry at Iowa State University, and is head of the Jenks Research Group.  He received his PhD from Columbia University in 1991.  He was named a Cottrell Scholar by the Research Corporation in 1995 and received and NSF Career Award in 1996.  His research interests include organic photochemistry, reactive intermediates, and sulfur chemistry. Thomas Wolff is a Professor of Chemistry at the Technical University of Dresden in Germany.  He received his PhD from the University of Göttingen in 1975.  He has served as a lecturer and guest professor at the University of Siegen and the University of Houston, and has been a National Representative of the European Photochemistry Association (EPA) since 2000.