Affiliation: | 1. VTT Technical Research Centre of Finland, P.O. Box 1000, FI-02044 VTT, Espoo, Finland;2. Aalto University, Department of Computer Science, P.O. Box 15400, FI-00076 Aalto, Espoo, Finland;3. Helsinki Institute for Information Technology HIIT, Department of Computer Science, Aalto University, P.O. Box 15400, FI-00076 Aalto, Espoo, Finland;Oxford Brookes University, UNITED KINGDOM |