1. Research Scientist, Cooperative Agricultural Research Center, College of Agriculture and Human Sciences, Prairie View A&M Univ., 100 University Dr., Prairie View, TX 77446 (corresponding author).
2. Associate Professor, Civil and Environmental Engineering, Northeastern Univ., 360 Huntington Ave., Boston, MA 02115.
3. Postdoctoral Scholar, Sierra Nevada Research Institute, Univ. of California, Merced, CA 95343; formerly, Postdoctoral Research Associate, Civil and Environmental Engineering, Northeastern Univ., 360 Huntington Ave., Boston, MA 02115.