Affiliation: | 1. NEC Europe Ltd., NEC Laboratories Europe, Rathausallee 10, 53757 Sankt Augustin, Germany;2. Department of Computer Science, University of Paderborn, Fürstenallee 11, 33102 Paderborn, Germany;3. International Computer Science Institute, 1947 Center Street Suite 600, 94704 Berkeley, CA, USA |