1. Department of Mathematics and Computer Science, Karlstad University, 65188 Karlstad, Sweden
2. Department of Informatics, University of Oslo, 0373 Oslo, Norway
3. NCSR “Demokritos”, Institute of Informatics and Telecommunications, 15341 Agia Paraskevi, Greece
4. Department of Electronics Technology, University of Malaga, 29016 Malaga, Spain
5. Intel Deutschland GmbH, Lilienthalstraße 4, 85579 Neubiberg, Germany