National and International

Complex group, Norway,

Advanced Materials and Complex Systems,, University of Oslo, Norway, Physics Department, K.J. Måløy, E.G. Flekkøy, /O Johnsen, S. Santucci.

Complex Materials, NTNU Trondheim, Norway, Physics Department, A. Hansen, Y. Meheust, J.O. Fossum.

Institute for Energy Technology, Kjeller, Norway G. Helgesen, A.T. Skeltorp.

Earth Sciences Division, Lawrence Berkeley national laboratory, California, USA, S.R. Pride,

Institut fur Geowissenschaften, Tektonophysik, University of Mainz, Daniel Koehn.

Department of theoretical Physics, Institute of Physics and Nuclear Engineering, Bucharest, Romania: Dragos V. Anghel

LGIT Grenoble, F. Renard, J.P. Gratier.

ESPCI / PMMH: granular group, A. Lindner, C. Chevalier