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Yukio Hayashi Professor
School of Knowledge Science、Human Life Design Area


B. Eng. (1985), M. Eng. (1987), degrees from Toyohashi University of Technology , Dr. Eng. degree from Kyoto University (1995)

■Professional Career

Researcher of ATR Audio and Visual Perception Research Labs (1991), ATR Human Information Processing Research Labs (1991-1994)


Network Science, Adhoc Comminication System, Community Analysis, Self-organization, Mathematical Physics and Engineering

■Research Keywords

Scale-free, Small-world, SNS, Wireless Communication System

■Research Interests

Mathematical Model of Information Space:
Modeling of "information space" that dymanically generates various relations of information-flagments according to user's viewpoints.
Network Webology:
Analysis of link-structures in the World Wide Web.
Network Larning Mechanism:
Acquisition and delivery of recomended information from network communities.
Complex Network Science
My research interests include the structure and dynamics of self-organized networks, the fault-tolerance, the efficient distributed design, etc. in complex network science for wireless adhoc systems and social communications.



  • Rethinking of Communication Requests, Routing, and Navigation Hierarchy on Complex Networks -for a Biologically Inspired Efficient Search on a Geographical Space-, Chapter 4,Yukio Hayashi( In "Networks -Emerging Topics in Computer Science,", ISBN 978-1-922227-02-7, Arshin Rezazadeh, Ladan Momeni, and Igor Bilogrevic (Eds)),iConcept Press(,2012,67-88

◇Published Papers

  • Spatially self-organized resilient networks by a distributed cooperative mechanism,Yukio Hayashi,Phusica A, Elsevier,457,255-269,2016/4/6
  • Recoverable DTN Routing based on a Relay of Cyclic Message-Ferries on a MSQ Network,Yukio Hayash,IEEE xplore, The 3rd Workshop on the FoCAS(Fundamentals of Collective Adaptive Systems) at The 9th IEEE International Conference on SASO(Self-Adaptive and Self-Organizing systems),2015//
  • Combinatorial and approximative analyses in a spatially random division process,Yukio Hayashi, Takayuki Komaki, Yusuke Ide, Takuya Machida, and Norio Konno,Physica A,329,9,2212-2225,2013/3/1

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◇Lectures and Presentations

  • A self-organized design of efficient and strong robust communication networks,Yukio Hayashi,Satellite event in Netsci2011, Networks of Networks: Systemic Risk and Infrastructural Interdependencies,Budapest, Hunguary,June 7
  • Robust and efficient design of geographical networks according to a population density,Yukio Hayashi,The 4th International Workshop and Conference on Network Science and their Applications,Venice Italy
  • Serious Damages in DDoS Attacks on the Internet at AS level,Yasumasa Ono, and Yukio Hayashi,The 9th Asia-Pacific Complex Systems Conference,Tokyo

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■Extramural Activities

◇Other Activities

  • The 9th Asia-pacific Complex Systems Conference,Program Committee,2009/11/04 - 2009/11/07
  • IPSJ,NE Group President
  • IPSJ,Journal Senior Editor

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■Academic Awards Received

  • IARIA BEST PAPER AWARD, International Conference on Adaptive and Self-adaptive Systems and Applications,,IARIA(,2012