Place/Year: Zurich, Switzerland / 2000
Chairman: Prof. G. Schweitzer
Place/Year: MIT Cambridge, USA / 1998
Chairmen: Prof. P. Allaire and Prof. D. Trumper
Place/Year: Kanazawa, Japan / 1996
Chairman: Prof. F. Matsumura
Place/Year: Zurich, Switzerland / 1994
Chairman: Prof. G. Schweitzer
Place/Year: Alexandria, VA, USA / 1992
Chairman: Prof. P. Allaire
Place/Year: Tokyo, Japan / 1990
Chairman: Prof. Higuchi
Place/Year: Zurich, Switzerland / 1988
Chairman: Prof. G. Schweitzer