Ryoichi Sekiguchi, Kenji Abe, Suzuki shogo, Masayasu Kumano, Daisuke asakura, Ryo Okabe, Takeru Kariya, Masaki Kawakatsu. Phased Human Activity Recognition based on GPS. Adjunct Proceedings of the 2021 ACM International Joint Conference on Pervasive and Ubiquitous Comp. 2021. 396-400
A two-dimensional representation of musical chords using the simplicity of frequency and period ratios as coordinates. Journal of Mathematics and Music. 2021
Ryoichi Sekiguchi, Masaki Kawakatsu, and Minoru Ohyama. Education Support System Using Indoor Position Information and Physical Activity. Journal of Physics: Conference Series. 2021. 1824