1. Engineer, Unintech Consulting Engineers, Inc., 12758 Cimarron Path, Suite 118, San Antonio, TX 78249.
2. Associate Professor, Dept. of Civil Engineering, Texas A&M Univ., College Station, TX 77843-3136.
3. Assistant Professor, Dept. of Civil Engineering, Texas A&M Univ., College Station, TX 77843-3136.