1. Duke Energy Distinguished Professor and Director, Global Institute for Energy and Environmental Systems (GIEES), Univ. of North Carolina, Charlotte, NC 28223.
2. Research Associate, Global Institute for Energy and Environmental Systems (GIEES), Univ. of North Carolina, Charlotte, NC 28223.
3. Professor, School of Arts and Sciences, Benedict College, Columbia, SC 29204.
4. Senior Visiting Research Scholar, Global Institute for Energy and Environmental Systems, Charlotte, NC 28223; formerly, Professor, College of Environment, Keimyung Univ., 1000 Shindang-dong, Daegu, Korea 704-701.