1. Project Engineer, KPFF Consulting Engineers, 180 Pacific Way, San Francisco, CA 94111.
2. Associate Professor, Dept. of Structural Engineering, Univ. of California at San Diego, 9500 Gilman Dr., La Jolla, CA 92093-0085.
3. Professor of Civil Engineering, Univ. of Canterbury, Private Bag, 4800, Christchurch, New Zealand.