parfait cvs a marche. Nicolas Moes Northwestern University, Dept of Mech. Eng. 2145 N. Sheridan, Evanston, IL 60208, USA email: moes at tam.nwu.edu Tel: 1-847-491-3046 Fax: 1-847-491-3915 URL: http://www.tam.nwu.edu/moes