1. Research Assistant and PhD Candidate, The Univ. of Illinois at Urbana Champaign, B243 Newmark Laboratory, MC-250, 205 N. Mathews Ave., Urbana, IL 61801.
2. Assistant Professor, Dept. of Civil & Environmental Engineering, The Univ. of Illinois, 205 N. Mathews MC-250, Urbana, IL 61801.