1. College of Arts, Media and Technology, Chiang Mai University, 239, Huay Kaew Road, T. Suthep, A. Muang, Chiang Mai, Thailand 50200, Thailand
2. LSTI, ESC Ecole Supérieure de Commerce Saint-Etienne, 51-53 cours Fauriel, BP 29 42009 Saint-Etienne cedex 2, France