1. Department of Environment and Life Engineering, Graduate School of Engineering, Maebashi Institute of Technology, Maebashi, Gunma, Japan
2. Department of Mechanical Engineering, Gunma Kenritsu Maebashikogyo High School, Maebashi, Gunma, Japan
3. Division of Systems Life Engineering, Graduate School of Engineering, Maebashi Institute of Technology, Maebashi, Gunma, Japan
4. Department of Systems Life Engineering, Maebashi Institute of Technology, Maebashi, Gunma, Japan