气候变化领域集成服务门户(CCPortal): Collective dynamics in entangled worm and robot blobs

CCPortal

DOI	10.1073/pnas.2010542118
	Collective dynamics in entangled worm and robot blobs
	Ozkan-Aydin Y.; Goldman D.I.; Saad Bhamla M.
发表日期	2021
ISSN	00278424
卷号	118 期号:6
英文摘要	Living systems at all scales aggregate in large numbers for a variety of functions including mating, predation, and survival. The majority of such systems consist of unconnected individuals that collectively flock, school, or swarm. However, some aggregations involve physically entangled individuals, which can confer emergent mechanofunctional material properties to the collective. Here, we study in laboratory experiments and rationalize in theoretical and robophysical models the dynamics of physically entangled and motile self-assemblies of 1-cm-long California blackworms (Lumbriculus variegatus, Annelida: Clitellata: Lumbriculidae). Thousands of individual worms form braids with their long, slender, and flexible bodies to make a three-dimensional, soft, and shape-shifting “blob.” The blob behaves as a living material capable of mitigating damage and assault from environmental stresses through dynamic shape transformations, including minimizing surface area for survival against desiccation and enabling transport (negative thermotaxis) from hazardous environments (like heat). We specifically focus on the locomotion of the blob to understand how an amorphous entangled ball of worms can break symmetry to move across a substrate. We hypothesize that the collective blob displays rudimentary differentiation of function across itself, which when combined with entanglement dynamics facilitates directed persistent blob locomotion. To test this, we develop a robophysical model of the worm blobs, which displays emergent locomotion in the collective without sophisticated control or programming of any individual robot. The emergent dynamics of the living functional blob and robophysical model can inform the design of additional classes of adaptive mechanofunctional living materials and emergent robotics. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Collective behavior; Emergent mechanics; Entangled active matter; Organismal collective; Swarming robot
语种	英语
scopus关键词	animal experiment; article; assault; California; drought; environmental stress; heat; locomotion; Lumbriculus variegatus; nonhuman; robotics; theoretical study
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/180722
作者单位	School of Physics, Georgia Institute of Technology, Atlanta, GA 30332, United States; School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States
推荐引用方式 GB/T 7714	Ozkan-Aydin Y.,Goldman D.I.,Saad Bhamla M.. Collective dynamics in entangled worm and robot blobs[J],2021,118(6).
APA	Ozkan-Aydin Y.,Goldman D.I.,&Saad Bhamla M..(2021).Collective dynamics in entangled worm and robot blobs.Proceedings of the National Academy of Sciences of the United States of America,118(6).
MLA	Ozkan-Aydin Y.,et al."Collective dynamics in entangled worm and robot blobs".Proceedings of the National Academy of Sciences of the United States of America 118.6(2021).