First Author:   Philippe Darreau LAPE, University of Limoges philippe.darreau@unilim.fr   LAPE, 5 rue Felix Eboue Limoges, 87031       Second Author: François Pigalle LAPE, University of Limoges francois.pigalle@unilim.fr   LAPE, 5 rue Felix Eboue Limoges, 87031