1. University of Ruse “Angel Kanchev”,Department of Telecommunications,Ruse,Bulgaria
2. Mae Fah Luang University,School of Information Technology,Chiang Rai,Thailand
3. University of Ruse “Angel Kanchev”,Department of Transport,Ruse,Bulgaria
4. Institute of Mechanics Bulgarian Academy of Sciences,Sofia,Bulgaria
5. University of Greenwich Kent,Faculty of Science & Engineering,United Kingdom