1. Assistant Professor, School of Civil and Environmental Engineering, Nanyang Technological Univ., Singapore 639798.
2. PhD, School of Electrical and Computer Engineering, Purdue Univ., West Lafayette, IN 47907.
3. Associate Professor, Div. of Construction Engineering and Management, School of Civil Engineering, Purdue Univ., West Lafayette, IN 47907.
4. Associate Professor, School of Electrical and Computer Engineering, Purdue Univ., West Lafayette, IN 47907.