About the Author: ZEHEV TADMOR, DSc, is Distinguished Professor of Chemical Engineering and President Emeritus of Technion--Israel Institute of Technology. He is member of the Israeli Academy of Science and Humanities, a foreign member of the National Academy of Engineering (U.S.A.), and the Chairman of the Samuel Neaman Institute for Advanced Studies in Science and Technology, Technion. COSTAS G. GOGOS, PhD, is Distinguished Research Professor in the Otto York Chemical Engineering Department, New Jersey Institute of Technology, and Chemical Engineering Professor Emeritus, Stevens Institute of Technology. He is also Chairman of the Board and President Emeritus of the Polymer Processing Institute.