1. Department of Electronics, Faculty of Technology Sciences, University des frères Mentouri Constantine, Constantine, Algeria
2. Electrical Engineering Laboratory (LGEB), Technology Faculty, University of Bejaia, Bejaia, Algeria
3. Centre for Ubiquitous Computing, Computer Science, University of Oulu, Oulu, Finland
4. Department of Mechanical Engineering, Faculty of Technology Sciences, University des frères Mentouri Constantine, Constantine, Algeria