1. Department of Computer Science and Information Engineering, College of Science and Engineering, National Dong Hwa University, Hualien, Taiwan
2. Graduate Institute of Network Learning Technology, National Central University, Taoyuan City, Taiwan
3. Department of Master of Educational Technology, Universitas Pelita Harapan, Kota Tangerang, Indonesia
4. Information Systems Department, Brawijaya University, Kota Malang, Indonesia
5. Department of Electronics Engineering Education, State University Yogyakarta, Yogyakarta, Indonesia