1. Graduate Research Assistant, Dept. of Structural Engineering, Univ. of California San Diego, 9500 Gilman Dr. La Jolla, CA 92093-0085.
2. Associate Professor, Dept. of Structural Engineering, Univ. of California San Diego, 9500 Gilman Dr. La Jolla, CA 92093-0085.
3. Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Colorado School of Mines, 1500 Illinois St. Golden, CO 80401.
4. Associate Professor, Dept. of Civil and Environmental Engineering, Colorado School of Mines, 1500 Illinois St. Golden, CO 80401.
5. Professor, Dept. of Civil and Environmental Engineering, Colorado School of Mines, 1500 Illinois St. Golden, CO 80401.