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, Dept. of Civil Engineering and Dept. of Geography and Earth Science and Director, Global Institute for Energy and Environmental Systems, Univ. of North Carolina, 9201 University City Blvd., Charlotte, NC 28223.