1. Assistant Professor, Dept. of Civil Engineering, Indian Institute of Technology—Madras, Chennai-600036, India. E-mail: gskumar@iitm.ac.in
2. Assistant Professor, Dept. of Civil Engineering, Indian Institute of Science, Bangalore, 560 012, India. E-mail: muddu@civiLiisc.emet.in
3. Associate Professor, Dept. of Mining and Geological Engineering, Univ. of Alaska Fairbanks, P.O. Box 755800, Fairbanks, AK 99775-5800 (corresponding author). E-mail: debu.misra@uaf.edu