1. Professor, Univ. of Applied Science, HSR, CH-8640 Rapperswil, Switzerland.
2. Senior Scientist, Dept. of Electronics/Metrology, EMPA, CH-8600 Dübendorf, Switzerland.
3. Research Scientist, ABB Corporate Research, CH-5405 Baden-Dättwil, Switzerland.
4. Professor, Institute of Structural Engineering, ETH, CH-8093 Zurich, Switzerland.