1. Chandrakasem Rajabhat University,Faculty of Science,Bangkok,Thailand
2. Telkom University,School of Computing,Bandung,Indonesia
3. King Mongkut’s Institute of Technology Ladkrabang,Faculty of Information Technology,Bangkok,Thailand
4. Universiti Teknologi Malaysia,Razak Faculty of Technology and Informatics,Kuala Lumpur,Malaysia
5. Doctoral Program of Tourism Trisakti School of Tourism,Jakarta,Indonesia