1. Information Technologies Institute Centre for Research and Technology Hellas, GR 57001 Thermi, Greece
2. Department of Management Science & Technology, Democritus University of Thrace (DUTH), GR 65404 Kavala, Greece
3. School of Rural and Surveying Engineering, Faculty of Engineering, Aristotle University of Thessaloniki, GR 54124 Thessaloniki, Greece
4. Skopelos Dive Centre, GR 57001 Thermi, Greece
5. Atlantis Consulting S.A., GR 57001 Thermi, Greece