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Kiyoshi Kotani / Associate Professor /
Department of human and engineered environmental studies / / Biomedical Signal Rrocessing, Nonlinear Dynamics
http://neuron.k.u-tokyo.ac.jp/

Career Summary
1998: Graduated, Faculty of Engineering, The University of Tokyo
2003: Doctor of Engineering from The University of Tokyo
2003: Research Associate, The University of Tokyo
2006: Lecturer, The University of Tokyo
2011: Associate Professor, The University of Tokyo
Educational Activities
Graduate school:Theory of measurement and analysis of biomedical signals
Undergraduate school: Introduction to biology and physiology,
Mathematical principles for precision engineering
Research Activities
Analysis of heart rate variability (1998-)
The human heartbeat is governed by autonomic nervous activity. I proposed a method to analyze heart rate variability in the respiratory phase domain and illustrated its advantages for the evaluation of autonomic nervous activity. In addition, I proposed a model for cardio-vascular system which demonstrates
statistical physical properties of heart rate variability
such as multifractality.
Literature
1) K. Kotani, et al: Adjoint method provides phase response functions for delay-induced oscillations. Physical Review Letters 109, 044101, 2012.
2) I. Yamaguchi, et al: Reduction theories elucidate the origins of complex biological rhythms generated by interacting delay-induced oscillations. PLoS ONE 6: e26497, 2011.
3) K. Kotani, et al: Postural-induced phase shift of respiratory sinus arrhythmia and blood pressure variations - insight from respiratory-phase domain analysis. American Journal of Physiology, Heart and Circulatory Physiology, 294: H1481-H1489, 2008.
4) K. Kotani, et al: Investigation of the influence of swallowing, coughing, and vocalization on heart rate variability with respiratory-phase domain analysis. Methods of Information in Medicine, 46, pp.179-185, 2007.
5) K. Kotani, et al: Model for complex heart rate dynamics in health and diseases, Physical Review E, 72, pp.041904-1-8, 2005.

Other Activities

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Future Plan
We aim to ellucidate the mechanisms of living systems with physical and physiological insights. Furthermore, we aim to apply them to support daily human activities.
Messages to Students
I hope that you will engage in your research with passion and curiosity.
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