2009 Fiscal Year Final Research Report
Formation Mechanism of Growing Random Patterns
| Project/Area Number |
18340115
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Mathematical physics/Fundamental condensed matter physics
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| Research Institution | Chuo University |
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Principal Investigator |
MATSUSHITA Mitsugu Chuo University, 理工学部, 教授 (20091746)
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| Co-Investigator(Renkei-kenkyūsha) |
KATORI Makoto 中央大学, 理工学部, 教授 (60202016)
TAGUCHI Yoshihiro 中央大学, 理工学部, 教授 (30206932)
MATSUYAMA Touhei 新潟県立大学, 専攻科 食物栄養専攻, 非常勤講師 (00047200)
SUDA Junichiro 佐世保工業高等専門学校, 一般科目, 教授 (40226577)
YAMAZAKI Yoshihiro 早稲田大学, 理工学部, 准教授 (10349227)
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| Project Period (FY) |
2006 – 2009
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| Keywords | パターン形成 / バクテリア / コロニー / スケーリング / フラクタル / 複雑系 / 対数正規分布 |
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| Research Abstract |
We have mainly studied three topics on universal structural and statistical properties of random patterns seen in nature and our society. 1. We have established morphological diagrams on how colony patterns of bacterial species Escherichia coli and Pseudomonas aeruginosa change when environmental conditions vary. We have also studied the spatiotemporal change of cell density when periodic colony growth occurs. 2. We have investigated scaling properties, especially self-affinity, of growing interface of random patterns, by taking bacterial colonies and real landscapes as examples. 3. We have laid the foundation that the fundamental statistical aspects seen in complex systems in general are described by lognormal distributions, based on our observations of prefectural and municipal populations, our body height and weight, and so on.
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