Title
Development in Biophysics of Complex Systems

Organizers
Ichiro Shimada (Tohoku University)

Synopsis
Science of complex systems is an emergent field of research developed since 1980s. Complex systems are composed of many different constituents interacting each other. These interactions are sources of instability, bifurcation and long range correlation which are fundamental characters of complex system.
 The view that only a limited number of mechanisms, or principles, lead to complexity in all its manifestations (from the galactic or universal to the molecular), has been supported by the observation of regularities that appear in the statistical description of complex systems (Paczuski & Bak, 1999). However, to find a logic which connects the relation between the underlying regularities and the emergent complexities is a hard task, the key for which would be the exploration of the interplay between different hierarchies of systems.
Living organisms are typical complex systems, studies for which at the molecular level have prevailed in the recent annual meetings of biophysical society of Japan. We now focus on the complex systems of living organisms of a higher order than the cell and present new mathematical physical approaches including experiments to dynamics of complex biological systems.

Speakers
・Mitsugu Matsushita (Chuo University): Statistical Aspects of Complex Systems
・Junichi Wakita (Chuo University): Size Distribution of Bacterial Cells in Homogeneously Spreading Disk-like Colonies by Bacillus subtilis
・Ichiro Shimada (Tohoku University): Memory effects on scale-free animal behavior
・Hiraku Nishimori (Hiroshima University): quantitative analysis and modeling for the dynamics of ants --from individual behavior to group motion
・Yoshinori Hayakawa (Tohoku University): Collective dynamics of flocks






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