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Theoretical Study on the Complexity-Robustness Relation of Evolving Open Systems

Research Project

Project/Area Number 18K03449
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 13010:Mathematical physics and fundamental theory of condensed matter physics-related
Research InstitutionThe University of Tokyo

Principal Investigator

SHIMADA Takashi  東京大学, 大学院工学系研究科(工学部), 准教授 (90431791)

Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords頑健性、安定性 / 多様性 / 生態系 / 土壌微生物 / 社会系 / 感染接触項 / 非平衡相転移 / 頑健性 / 安定性 / 社会・経済系 / Wikipedia / 土壌微生物群集 / 開放系 / 系の頑健性 / 統計物理学 / 複雑ネットワーク / 開放系・進化系
Outline of Final Research Achievements

This project aimed at further developing our theoretical study on the robustness of large and open (i.e. the constituting elements may be added and removed) systems, and applying it to real problems. By introducing dormancy process before the extinction/removal process to the previous basic model, we obtained better theoretical bridging between the minimal modeling and complex models and systems. We also obtained better understanding of the nature of real large and open systems from data-analysis-based theoretical studies on soil-microbiome, crowd and epidemic spread, and edit activity on Wikipedia.

Academic Significance and Societal Importance of the Research Achievements

現実の大規模な系の多く(狭義の生態系のみならず生体系、社会・経済システム、工学システム等)は、構成要素の追加と消滅のプロセスにさらされている「開放進化系」であるので、その頑健性についての普遍な性質についての理解を深める事ができたことは意義深い。実際、モデリングにおける理論面での進展に加え、人-人の接触項や Wikipedia での編集者-記事関係などの個別の系の解析における結果は、それぞれの系へのより良い介入の仕方を与えるものともなった。

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (30 results)

All 2021 2020 2019 2018 Other

All Int'l Joint Research (4 results) Journal Article (9 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 9 results,  Open Access: 6 results) Presentation (16 results) (of which Int'l Joint Research: 10 results,  Invited: 7 results) Remarks (1 results)

  • [Int'l Joint Research] Aalto University(フィンランド)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Central European University(ハンガリー)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Aalto 大学(フィンランド)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Aalto University(フィンランド)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Ecology of the digital world of Wikipedia2021

    • Author(s)
      Fumiko Ogushi, Janos Kertesz, Kimmo Kaski, and Takashi Shimada
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 18371-18371

    • DOI

      10.1038/s41598-021-97755-w

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Balanced-imbalanced transitions in indirect reciprocity dynamics on networks2021

    • Author(s)
      Koji Oishi, Shuhei Miyano, Kimmo Kaski, and Takashi Shimada
    • Journal Title

      Physical Review E

      Volume: 104 Issue: 2 Pages: 024310-024310

    • DOI

      10.1103/physreve.104.024310

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] グラフダイナミクスモデル系のガン牽制への相互作用の構造の影響2021

    • Author(s)
      島田尚, 小串典子
    • Journal Title

      シミュレーション(日本シミュレーション学会) 2021年9月号 小特集「社会・組織におけるダイナミクスとネットワーク科学」

      Volume: 40 Pages: 125-130

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 再帰的指標で読み解く Wikipedia 編集の生態系2021

    • Author(s)
      小串典子, 島田尚
    • Journal Title

      シミュレーション(日本シミュレーション学会) 2021年9月号 小特集「社会・組織におけるダイナミクスとネットワーク科学」

      Volume: 40 Pages: 131-136

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 外出人数とCOVID-19 実効再生産数のScaling 関係による人-人接触項の検証2021

    • Author(s)
      島田尚
    • Journal Title

      第26回 交通流と自己駆動粒子系 シンポジウム(査読付き紀要)

      Volume: ISSN 2434-5946 Pages: 23-26

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 関西圏におけるCOVID-19 の感染拡大率と外出人数の関係について2021

    • Author(s)
      黒田大地、島田尚
    • Journal Title

      第26回 交通流と自己駆動粒子系 シンポジウム(査読付き紀要)

      Volume: ISSN 2434-5946 Pages: 27-30

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 一次元周期系上の単純採餌運動の拡散係数2019

    • Author(s)
      島田尚、大平徹
    • Journal Title

      第25回交通流と自己駆動粒子系のシンポジウム紀要 (http://traffic.phys.cs.is.nagoya-u.ac.jp/~mstf/pdf/mstf2019-07.pdf)

      Volume: -

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Temporal inactivation enhances robustness in an evolving system2019

    • Author(s)
      F. Ogushi, J. Kertesz, K. Kaski, and T. Shimada
    • Journal Title

      Royal Society Open Science

      Volume: 6 Issue: 2 Pages: 181471-181471

    • DOI

      10.1098/rsos.181471

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Statistical Physics Approach to the Impermanence and Robustness of <i>Ecosystems</i>2018

    • Author(s)
      島田 尚, 村瀬洋介, 小串典子
    • Journal Title

      Seibutsu Butsuri

      Volume: 58 Issue: 5 Pages: 241-244

    • DOI

      10.2142/biophys.58.241

    • NAID

      130007492744

    • ISSN
      0582-4052, 1347-4219
    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] A Comparative Study of the Ecology of Wikipedia2021

    • Author(s)
      Takashi Shimada
    • Organizer
      Roles of Heterogeneity in Non-equilibrium collective dynamics (RHINO 2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Mean-field Approach to a Glassy Slow Dynamics in an Indirect Reciprocity Model on Networks2021

    • Author(s)
      Takashi Shimada
    • Organizer
      Complex Networks: The 10th International Conference on Complex Networks and their Applications (Madrid, Spain)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Characterization of the digital knowledge ecosystem of Wikipedia2021

    • Author(s)
      Fumiko Ogushi and Takashi Shimada
    • Organizer
      Complex Networks: The 10th International Conference on Complex Networks and their Applications (Madrid, Spain)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 構成要素が入れ替わり続けるネットワークの頑健性について2021

    • Author(s)
      島田尚
    • Organizer
      生理研シンポジウム
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Is Lotka-Volterra dynamics applicable for human contact?2020

    • Author(s)
      Takashi Shimada
    • Organizer
      Roles of Heterogeneity in Non-equilibrium collective dynamics (RHINO 2020)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 周期一次元系上の単純な採餌運動について2020

    • Author(s)
      島田尚、大平徹
    • Organizer
      日本物理学会「秋季大会」(物性)
    • Related Report
      2020 Research-status Report
  • [Presentation] COVID-19 感染拡大率と外出人数との関係について2020

    • Author(s)
      島田 尚、水門善之、和泉潔
    • Organizer
      日本数理生物学会年会(JSMB2020)
    • Related Report
      2020 Research-status Report
  • [Presentation] A mechanism of determining the robustness of evolving open system2019

    • Author(s)
      Takashi Shimada
    • Organizer
      FSP2019: Frontiers of Statistical Physics (Hongo Campus, Tokyo, Japan)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] A Positive Role of Heterogeneity in Group Chase and Escape2019

    • Author(s)
      Takashi Shimada
    • Organizer
      Roles of Heterogeneity in Non-equilibrium collective dynamics (APCTP, 韓国)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 土壌微生物の群集構造を数理で読み解く2019

    • Author(s)
      島田 尚、美世一守、大塚重人
    • Organizer
      微生物生態学会第33回大会(山梨大学)
    • Related Report
      2019 Research-status Report
  • [Presentation] A positive role of temporal inactivation in evolving open systems2019

    • Author(s)
      Takashi Shimada, Fumiko Ogushi, Janos Kertesz, Kimmo Kaski
    • Organizer
      Conference on Complex Systems 2019 (Nanyang Technological University, シンガポール )
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] A positive role of heterogeneity of the agents in a model of group chase and escape2019

    • Author(s)
      Takashi Shimada
    • Organizer
      SWARM2019 (OIST)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] On the motions of chasers and foragers2019

    • Author(s)
      Takashi Shimada
    • Organizer
      Self-Organization & Robustness of Evolving Many-Body Systems (RIKEN-RCCS)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Robustness and Plasticity of Ecological & Financial Systems2018

    • Author(s)
      T. Shimada
    • Organizer
      The 6th International Workshop on Physics of Social Complexity (2018/6/1 POSTECH, 韓国)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] [依頼講演] 開放進化系の複雑性-頑健性関係について2018

    • Author(s)
      島田 尚
    • Organizer
      複雑コミュニケーションサイエンス研究会 (2018/6/8 京都)
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] 変遷を続けるネットワーク系の頑健性について2018

    • Author(s)
      島田 尚
    • Organizer
      経済・社会への分野横断的研究会 (2018/12/4 キヤノングローバル戦略研究所、東京)
    • Related Report
      2018 Research-status Report
    • Invited
  • [Remarks] 新しい再帰的指標によってWikipedia 編集者と記事の多様性を捉える

    • URL

      https://www.t.u-tokyo.ac.jp/press/foe/press/setnws_202109221410123108235153.html

    • Related Report
      2021 Annual Research Report

URL: 

Published: 2018-04-23   Modified: 2023-01-30  

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