1. Associate Professor, Dept. of Civil and Environmental Engineering, Box 19308, Univ. of Texas at Arlington, Arlington, TX 76019-0308 (corresponding author).
2. Doctoral Research Assistant, Dept. of Civil and Environmental Engineering, Box 19308, Univ. of Texas at Arlington, Arlington, TX 76019-0308.
3. Adjunct Professor, Dept. of Chemistry, Southern Methodist Univ., ChK Group Inc., 2045 Belgium Drive, Plano, TX.