1. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Connecticut, 261 Glenbrook Rd., Unit 2037, Storrs, CT 06269-2037.
2. Nathan M. and Anne M. Newmark Endowed Chair in Civil Engineering and NCSA Senior Center Affiliate, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, 2213 Newmark Civil Engineering Laboratory, MC-250 205 North Matthews Ave., Urbana, IL 61801.
3. Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of Southern California, 3620 S Vermont Ave., KAP210, Los Angeles, CA 90089-2531.
4. Professor and Honorary Member of JSME, College of Science and Technology, Nihon Univ., 1-8-14 Kanda Surugadai, Chiyoda-ku, Tokyo 101-8308, Japan.