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Shiro YANO,Yusuke IKEMOTO,Hitoshi AONUMA,Hajime ASAMA 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
To design distributed autonomous systems, it’s effective to mimic animal society. We studied cricket Gryllus Bimaculatus as a typically aggressive insect. In this paper, we construct mathematical model of the in dividual internal mechanism swhich modulate aggressiveness and we make agents to fight each other under some density. As a result, it’s confirmed to occurcritical phenomenon upon each agent’s internal states caused by density effect. At last, we discuss the usage of such transition in distributed auto nomous system.
Satoru Taguchi,Mohammed E. Choudhury,Kanta Mikami,Ryo Utsunomiya,Hajime Yano,Junya Tanaka 대한재활의학회 2022 Annals of Rehabilitation Medicine Vol.46 No.6
Objective To determine the appropriate time points to start regular exercise which could reduce age-related anxiety and impaired social behavior.Methods For this study, 8-week-old male Wistar rats were divided into three groups: no exercise (NoEX), short-term exercise (S-Ex), and long-term exercise (L-Ex) groups. S-Ex-group rats started treadmill exercise at 12 months of age, while L-Ex rats started from at 2 months of age. Exercise rats were forced to walk on the treadmill three times per week, with 1- to 2-day intervals for 10 minutes during the first 2 weeks, at 10 m/min until 17 months of age, and at 8 m/min thereafter. At 19 months of age, behavioral tests were performed to assess the effects of exercise on age-induced behavioral change as well as quantitative polymerase chain reaction were done to uncover the mechanism behind the behavioral changes.Results Anxiety-like behavior was improved by long-term exercise. Additionally, rats belonging to the S-Ex and L-Ex groups showed improved social behavior and increased curiosity about interesting objects. The qPCR data showed that treadmill exercise suppressed the expression of immediate-early genes in the prefrontal cortex of the aged rats.Conclusion This study suggests that long-term exercise represses early response genes, and in this way, it increases resistance to stress, diminishes anxiety-related behavior, and improves social behavior. These findings underscore the need to consider appropriate time to start exercise to prevent stress induced anxiety related behavior.