1. Assistant Professor, Dept. of Civil Engineering and Global Institute for Energy and Environmental Systems, Univ. of North Carolina, 9201 University City Blvd., Charlotte, NC 28223.
2. Duke Energy Distinguished Professor, and Director, Global Institute for Energy and Environmental Systems, Univ. of North Carolina, 9201 University City Blvd., Charlotte, NC 28223.
3. Specialist, Particle Characterization Operation, Beckman Coulter, Inc., Miami, FL 33116.