Introduction to Yuragi Theory and Yuragi Control

Abstract

Noise and fluctuations are phenomena that are frequently observed in biology and nature, but also intrinsically occur in various types of technological and engineered systems. In this chapter, we provide an introduction to the concepts and methods that underlie Yuragi-based control mechanisms. Yuragi is the Japanese term for fluctuations, and this concept can be utilized for simple yet effective control mechanisms to adaptively control information and communication systems depending on the environment with simple rules. In this chapter, we present several examples to illustrate how fluctuations occur in biological systems and how stochastic biological models can be utilized to design new robust and flexible control algorithms, such as attractor selection and attractor perturbation mechanisms.