1. Dean and AGIP Professor, School of Sciences and Engineering, The American Univ. in Cairo, Egypt, and Professor Emeritus, Univ. of California, Irvine, CA 92697.
2. Assistant Professor, Dept. of Civil Engineering, Helwan Univ., Cairo, Egypt; formerly, Graduate Student, Dept. of Civil and Environmental Engineering, Univ. of California, Irvine, CA 92697.