1. Research Assistant, Structural Engineering Institute, IMAC-IS-ENAC, 1015 Lausanne, EPFL, Switzerland.
2. Research Associate, Structural Engineering Institute, IMAC-IS-ENAC, 1015 Lausanne, EPFL, Switzerland.
3. Lecturer, Cambridge Univ. Engineering Dept., Cambridge, U.K.
4. Professor, Structural Engineering Institute, IMAC-IS-ENAC, 1015 Lausanne, EPFL, Switzerland.