Unified framework for the entropy production and the stochastic interaction based on information geometry

We show a relationship between the entropy production in stochastic thermodynamics and the stochastic interaction in the information integrated theory. To clarify this relationship, we newly introduce an information geometric interpretation of the entropy production for a total system and the partial entropy productions for subsystems. We show that the violation of the additivity of the entropy productions is related to the stochastic interaction. This framework is a thermodynamic foundation of the integrated information theory. We also show that our information geometric formalism leads to a novel expression of the entropy production related to an optimization problem minimizing the Kullback-Leibler divergence. We analytically illustrate this interpretation by using the spin model.Comment: 13pages, 4 figure

Development of Yasuo Kuniyoshi Studies: Art Education and Rural Revitalization A Report on the Second Period Activities and Its Considerations

　国吉康雄記念・美術教育研究と地域創生寄付講座は，2015年10月に公益財団法人福武教育文化振興財団と公益財団法人福武財団の寄付金により，岡山大学大学院教育学研究科に本学初の人文社会系初の寄付講座として，2015年10月１日から2018年３月末日での期限設置の契約が交わされた。本実践報告では，第１期の契約を延長し，活動の範囲を大きく広げた第２期（2018年４月～ 2021年３月）の活動について記述する

島嶼陸産貝類における殻色適応進化の方向と歴史

要約のみTohoku University千葉聡課

Prior learning materials to facilitate “dialogue and inquiry” in remote lectures- Publication of scenarios for the production of instructional videos of artworks for use in flipped classes -

　国立大学法人岡山大学大学院教育学研究科《国吉康雄記念・美術教育研究と地域創生講座》では，美術鑑賞の機会に，対話と探究を用い，アート作品の制作背景を社会課題の解決と関 連づけて考察する手法を開発し，実践している。現在，COVID⊖19の感染拡大を防ぐことを目的としたリモートでの講義プログラムにおいても，この鑑賞手法を用いるため，「反転学習用動画教材」として，岡山県に関係する洋画家ふたりに関する動画を制作した。ここでは，制作のために執筆したシナリオを，反転学習用の動画制作のための作例として公開する

Synthesis of Formation Control Systems for Multi-Agent Systems under Control Gain Perturbations

This paper proposed a linear matrix inequality (LMI)-based design method of non-fragile guaranteed cost controllers for multi-agent systems (MASs) with leader-follower structures. In the guaranteed cost control approach, the resultant controller guarantees an upper bound on the given cost function together with asymptotical stability for the closed-loop system. The proposed non-fragile guaranteed cost control system can achieve consensus for MASs despite control gain perturbations. The goal is to develop an LMI-based sufficient condition for the existence of the proposed non-fragile guaranteed cost controller.  Moreover, a design problem of an optimal non-fragile guaranteed cost controller showe that minimizing an upper bound on the given quadratic cost function can be reduced to constrain a convex optimization problem. Finally, numerical examples were given to illustrate the effectiveness of the proposed non-fragile controller for MASs

A Robust Formation Control Strategy for Multi-Agent Systems with Uncertainties via Adaptive Gain Robust Controllers

This paper deals with a design problem of an adaptive gain robust controller which achieves consensus for multi-agent system (MAS) with uncertainties. In the proposed controller design approach, the relative position between the leader and followers are considered explicitly, and the proposed adaptive gain robust controller consisting of fixed gains and variable ones tuned by time-varying adjustable parameters can reduce the effect of uncertainties. In this paper, we show that sufficient conditions for the existence of the proposed adaptive gain robust controller are reduced to solvability of linear matrix inequalities (LMIs). Finally, the effectiveness of the proposed robust formation control system is verified by simple numerical simulations. A main result of this study is that the proposed adaptive gain robust controller can achieve consensus and formation control giving consideration to relative distance in spite of uncertainties

Reaction in photofuel cells using allophane-titania nanocomposite electrodes

Allophane-titania nanocomposite electrodes for photofuel cells were prepared from titanium alkoxide sols dispersing the natural clay mineral allophane. The electrochemical measurements indicated that the oxidative degradation of starch in the solutions and suspensions enhanced the generation of electricity during UV irradiation. CO2 was observed as the degradation product. A higher photocurrent was observed using the allophane titania nanocomposite electrode adsorbing a greater amount of the starch molecules. Allophane increased the capacity of the electrode to adsorb the starch molecules, even from the suspensions. This brought the molecules close to the titania nanoparticles, on which their oxidation induced the generation of electricity.ArticleAPPLIED CATALYSIS B-ENVIRONMENTAL. 147:246-250 (2014)journal articl