1. Graduate School of Science and Technology, Kyoto Institute of Technology, Kyoto, Japan
2. IoT system section, information and communication technology buisness promotion department, Hitachi Zosen Corporation, Osaka, Japan
3. Faculty of Informatics, The University of Fukuchiyama, Fukuchiyama, Japan
4. Department of Medical Informatics and Biomedical Engineering, Shiga University of Medical Science, Otsu, Japan