Dr T. D.Papathanasiou obtained his engineering diploma from the National technical University of Athens and his PhD in chemical engineering from McGill University. Between 1992 and 1997 he was Unilever Lecturer in Chemical Engineering at Imperial College, London and he is currently Associate professor at the University of South Carolina, USA. Dr D. C. Geull received his BS in chemical engineering from Iowa State University and his MS and PhD in chemical engineering from MIT. He was then awarded a Director's Post-Doctoral Fellowship at Los Alamos National laboratory and later accepted a position as a technical staff member there.