The Relation between Observers' Psychophysiological Conditions and Human Errors during Monitoring Task. - Akira Imanishi; Mayumi Oyama-Higa (SMC, 2006)

On the largest lyapunov exponents of finger plethysmogram and heart rate under anxiety, fear, and relief states. - Akira Imanishi; Mayumi Oyama-Higa (SMC, 2007)

Possibility of mental health self-checks using divergence of pulse waves. - Mayumi Oyama-Higa; Teijun Miao; Junko Tsujino; Akira Imanishi (SMC, 2007)

What affects the Lyapunov exponents of finger plethysmogram? - Akira Imanishi; Mayumi Oyama-Higa (SMC, 2008)

Effect of Anesthesia on Chaotic Dynamics in Finger Plethysmograms. - Mayumi Oyama-Higa; Tiejun Miao; Akira Imanishi; Junji Kojima (ICSOFT (2), 2009)

The application of non-linear methods to the analysis of finger plethysmograms for ergonomics. - Akira Imanishi; Mayumi Oyama-Higa (Int. J. Comput. Aided Eng. Technol., 2009)