2020. 11. 16【Oral】Seung-Il Cho, Minami Tsuchiya, Atsushi Tanaka, Muneki Yasuda, Tomochika Harada, Michio Yokoyama, “A Study on the Correlation between the Subjective Satisfaction of Sleep and Phase of a 90-minute Periodic Signal,” The 2020 International Symposium on Nonlinear Theory and its Applications (NOLTA2020), Okinawa, Japan (Virtual)