1. LISPEN EA 7515, Arts et Métiers Institute of Technology, 13100 Aix-en-Provence, France
2. Department of Civil and Industrial Engineering, ASTRO Laboratory, University of Pisa, 56122 Pisa, Italy
3. UMR MAP 3495 CNRS/MC, Campus CNRS Joseph-Aiguier, 13402 Marseille, France