1. Ph.D. Candidate, Dept. of Civil and Environmental Engineering, Pennsylvania State Univ., University Park, PA 16802 (corresponding author).
2. Postgraduate Associate, Division of Earth and Ocean Sciences, Nicholas School of the Environment, Duke Univ., Durham, NC 27708; formerly, Dept. of Civil and Environmental Engineering, Pennsylvania State Univ., University Park, PA.
3. Assistant Professor, Dept. of Civil and Environmental Engineering, Pennsylvania State Univ., University Park, PA .
4. Professor, Dept. of Civil Engineering, Queen’s School of Engineering, Univ. of Bristol, Bristol BS8 1TH, UK.