Hello Sorry I can't participate in todays meeting. There is a defence today I would like to hear. I hope I can make it next week. Cathrina -- M.Sc. Cathrina Sowa Ph. D. student Institut für Experimentalphysik I Ruhr-Universität Bochum Universitätsstr. 150 44801 Bochum Office: NB 2/74 Tel.: 0234-32-23564 Web: www.ep1.rub.de