The use of a non-linear analysis of pulse waves to measure the impact of music therapy and animal therapy on psychiatric care. - Yoko Hirohashi; Mayumi Oyama-Higa (SMC, 2008)

Consideration for improvement of demetia that uses communications. - Mayumi Oyama-Higa; Yoko Hirohashi; Tiejun Miao (SMC, 2010)

Study of relations between the elderly and the care workers in the welfare facilities for the elderly, using non linear analysis of finger plethysmograms. - Yoko Hirohashi; Mayumi Oyama-Higa; Sang-jae Lee (SMC, 2011)