1. Associate Professor, Dept. of Civil and Environmental Engineering, 200 Patton Hall, Virginia Tech, Blacksburg, VA 24061.
2. Associate Professor, Division of Engineering Technology, Univ. of Pittsburgh at Johnstown, 225 Engineering and Sciences Building, Johnstown, PA 15904.
3. Univ. Distinguished Professor, Dept. of Civil and Environmental Engineering, 200 Patton Hall, Virginia Tech, Blacksburg, VA 24061.