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Publication type: Article in scientific journal
Type of review: Peer review (publication)
Title: Morphology-induced collective behaviors : dynamic pattern formation in water-floating elements
Authors: Nakajima, Kohei
Tientcheu Ngouabeu, Aubery Marchel
Miyashita, Shuhei
Göldi, Maurice
Füchslin, Rudolf Marcel
Pfeifer, Rolf
DOI: 10.21256/zhaw-1666
Published in: PLOS ONE
Volume(Issue): 7
Issue: 6/e37805
Issue Date: 2012
Publisher / Ed. Institution: Public Library of Science
ISSN: 1932-6203
Language: English
Subject (DDC): 530: Physics
Abstract: Complex systems involving many interacting elements often organize into patterns. Two types of pattern formation can be distinguished, static and dynamic. Static pattern formation means that the resulting structure constitutes a thermodynamic equilibrium whose pattern formation can be understood in terms of the minimization of free energy, while dynamic pattern formation indicates that the system is permanently dissipating energy and not in equilibrium. In this paper, we report experimental results showing that the morphology of elements plays a significant role in dynamic pattern formation. We prepared three different shapes of elements (circles, squares, and triangles) floating in a water-filled container, in which each of the shapes has two types: active elements that were capable of self-agitation with vibration motors, and passive elements that were mere floating tiles. The system was purely decentralized: that is, elements interacted locally, and subsequently elicited global patterns in a process called self-organized segregation. We showed that, according to the morphology of the selected elements, a different type of segregation occurs. Also, we quantitatively characterized both the local interaction regime and the resulting global behavior for each type of segregation by means of information theoretic quantities, and showed the difference for each case in detail, while offering speculation on the mechanism causing this phenomenon.
Fulltext version: Published version
License (according to publishing contract): CC BY 4.0: Attribution 4.0 International
Departement: School of Engineering
Appears in Collections:Publikationen School of Engineering

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