Ogawa, Katsushi http://orcid.org/0000-0003-2720-8728
Uegami, Kenji
Chiba, Itaru
Uno, Kyono
Aoyama, Hiroki
Yonenobu, Kazuo
Jeong, Seonghee
Funding for this research was provided by:
The Graduate School Joint-Research Fund of Osaka Electro-Communication University
Article History
Received: 7 October 2019
Accepted: 15 June 2020
First Online: 22 June 2020
Competing interests
: The authors declare that they have no competing interests.