1. Reader, Dept. of Civil Engineering, Aligarh Muslim Univ., Aligarh, India.
2. Associate Professor, Dept. of Civil Engineering, Indian Institute of Technology Roorkee, India; formerly, University of Roorkee, Roorkee, India.
3. Professor of Civil Engineering and Deputy Director, Indian Institute of Technology Roorkee; formerly, University of Roorkee, Roorkee, India.