1. Professor and Chair, Dept. of Civil Engineering, Univ. of New Mexico, Albuquerque, NM 87131.
2. Vice President for Strategic Technology, Zapata Engineering, 6302 Fairview Rd., Suite 600, Charlotte, NC 28210.
3. Assistant Professor, Dept. of Civil, Environmental and Infrastructure Engineering, George Mason Univ., 4400 University Dr., Mail Stop 6C1, Fairfax, VA 22030.