1. Senior Lecturer, Dept. of Structural Engineering and Construction Management, Technion—Israel Institute of Technology, Technion City, Haifa, 32000, Israel.
2. Geotechnical Engineer and Associate, Africon Engineering International (Pty) Ltd., P.O. Box 905, Pretoria, 0001, South Africa; formerly, Cambridge Univ., U.K.
3. Reader in Geomechanics, Dept. of Engineering, Univ. of Cambridge, Trumpington Street, Cambridge CB2 1PZ, U.K.
4. Professor of Geotechnical Engineering, Dept. of Engineering, Univ. of Cambridge, Trumpington Street, Cambridge CB2 1PZ, U.K.