1. Project Engineer, ABNA Eng. Inc., St. Louis, MO; formerly, Research Assistant, Dept. of Civil and Environmental Engineering, Univ. of North Carolina, Charlotte, NC (corresponding author).
2. Assistant Professor, Dept. of Natural Resources and Environmental Design, North Carolina Agricultural and Technical State Univ., Greensboro, NC 27411.
3. Duke Energy Distinguished Professor and Director, Global Institute of Energy and Environmental Systems, Univ. of North Carolina, Charlotte, NC 28223.