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このアイテムの引用には次の識別子を使用してください: http://hdl.handle.net/10445/4395

タイトル: Protoplasmic computing to memorize and recall periodic environmental events
著者: Tero, Atsushi
Saigusa, Tetsu
Nakagaki, Toshiyuki
アブストラクト: Single-celled organisms might be more intelligent than previously envisaged[1]-[5]. The acts of anticipating and recalling events are higher functions performed by the brains of higher animals; their evolutionary origins and the way they self-organize, however, remain open questions. Here we show that an amoeboid organism can anticipate the timing of periodic events. The plasmodium of the true slime mold Physarum polycephalum moves rapidly under favorable conditions, but stops moving when transferred to less-favorable conditions. For example, plasmodia exposed to low temperature and low humidity, presented in three consecutive pulses at constant intervals, reduced their locomotive speed in response to each episode. When favorable conditions were subsequently reintroduced, the plasmodia spontaneously reduced their locomotive speed at the point in time when the next unfavorable episode would have occurred. This implies that the plasmodia are able to anticipate impending environmental change. After this anticipatory response had been evoked several times, the locomotion of the plasmodia returned to normal speed; however, the slowing down could subsequently be induced by a single unfavorable pulse, implying recall of the periodicity that had been memorized. We have explored the mechanisms underlying this behavior from a dynamical systems perspective. Our results suggest that this primitive intelligence is of cellular origin and that simple dynamics might be sufficient to explain its emergence. abstract environment.
研究業績種別: 原著論文/Original Paper
資料種別: Journal Article
査読有無: あり/yes
単著共著: 共著/joint
発表雑誌名,発表学会名など: Natural Computing, 2nd International Workshop on Natural Computing,Proceedings in Information and Communications Technology
巻: PICT 1
開始ページ: 213
終了ページ: 221
年月日: 2009年
出版社: Springer-Verlag
出現コレクション:中垣 俊之

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