1. Shonan Institute of Technology,Dept. of Information Science,Kanagawa,Japan
2. Junior College of Aizu,Dept. of Industrial Information Science,Fukushima,Japan
3. Waseda University,Center for Data Science,Tokyo,Japan
4. Chiba University,Faculty of Education,Chiba,Japan
5. Waseda University,Faculty of Education and Integrated Arts and Sciences,Tokyo,Japan
6. Research Institute for Science and Engineering, Waseda University,Tokyo,Japan