Dr. Gianni Petrangeli is Consultant to the IAEA (International Atomic Energy Association) for the preparation of nuclear safety guidelines and participation in safety evaluation missions. He is a researcher for nuclear safety for the European Commission and a member of the Faculty Council for the Doctorate in Nuclear and Industrial Safety, University of Pisa, Italy. Dr. Petrangeli spent time as a Professor of Nuclear & Industrial Safety and Environment at the University of Roma, and at the University of Pisa where he received his Doctorate in Nuclear and Industrial Safety and was also a Professor on Complex Safety Systems.Nuclear Engineering Department, North Carolina State University, USA (deceased)Galen J. Suppes is a professor at the Department of Chemical Engineering of the University of Missouri, Columbia, USA. He received his B.S in Chemical Engineering from Kansas State University in 1985, and his Ph.D. from The Johns Hopkins University in 1989. He has also done Post-Doc Class Work at the University of Huston in 1991/92, and is author of over 120 documents, including peer reviewed articles, conference papers and scientific reports.