Affiliation: | Département de Physique, Universitéde Montréal, C.P. 6128, Succ. A, Montréal, Québec, Canada,H3C 3J7,; CERCA,5160 Boul. Décarie, Bureau400, Montréal, Québec, Canada,H3X 2H9. E-mail:;, Minnesota Supercomputer Institute and Department of Geology and Geophysics, University of Minnesota, Minneapolis,MN 55415-1227, USA |