Affiliation: | 1. Department of Computer Science, National University of Singapore, Singapore 117417, Republic of Singapore;2. Fachbereich Informatik, Hochschule Darmstadt, Haardtring 100, 64295 Darmstadt, Germany;3. Department of Computer & Information Sciences, University of Delaware, Newark, DE 19716, USA;4. Department of Computer Science, University of Regina, Regina, Saskatchewan, Canada S4S 0A2 |