1. Assistant Professor, Dept. of Civil Engineering, North Carolina A&T State Univ., 1601 E. Market St., Greensboro, NC 27411 (corresponding author).
2. Lead Scientist, Western Research Institute, 365 N. 9th St., Laramie, WY 82072.
3. Professor and Director, Biological Engineering Program, North Carolina A&T State Univ., 1601 E. Market St., Greensboro, NC 27411.
4. Assistant Professor, Dept. of Chemistry, North Carolina A&T State Univ., 1601 E. Market St., Greensboro, NC 27411.
5. Civil and Environmental Engineering, Michigan Technological Univ., 1400 Townsend Dr., Houghton, MI 49931.