Connecting cooperative transport by ants with the physics of active swimmers

Kavli Affiliate: Ariel Amir | First 5 Authors: Tabea Heckenthaler, Tobias Holder, Ariel Amir, Ofer Feinerman, Ehud Fonio | Summary: Some ant species are known as efficient transporters that can cooperatively carry food items which would be too large for a single ant. Previous studies of cooperative transport focused on the role of individual ants […]


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Connecting cooperative transport by ants with the physics of self-propelled particles

Kavli Affiliate: Ariel Amir | First 5 Authors: Tabea Heckenthaler, Tobias Holder, Ariel Amir, Ofer Feinerman, Ehud Fonio | Summary: Paratrechina longicornis ants are known for their ability to cooperatively transport large food items. Previous studies have focused on the behavioral rules of individual ants and explained the efficient coordination using the coupled-carrier model. In […]


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Nonlinear waves in flexible mechanical metamaterials

Kavli Affiliate: Katia Bertoldi | First 5 Authors: Bolei Deng, Jordan R. Raney, Katia Bertoldi, Vincent Tournat, | Summary: Flexible mechanical metamaterials are compliant structures engineered to achieve unique properties via the large deformation of their components. While their static character has been studied extensively, the study of their dynamic properties is still at an […]


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Nonlinear waves in flexible mechanical metamaterials

Kavli Affiliate: Katia Bertoldi | First 5 Authors: Bolei Deng, Jordan R. Raney, Katia Bertoldi, Vincent Tournat, | Summary: Flexible mechanical metamaterials are compliant structures engineered to achieve unique properties via the large deformation of their components. While their static character has been studied extensively, the study of their dynamic properties is still at an […]


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Recurrent flow patterns as a basis for turbulence: predicting statistics from structures

Kavli Affiliate: Michael P. Brenner | First 5 Authors: Jacob Page, Peter Norgaard, Michael P. Brenner, Rich R. Kerswell, | Summary: A dynamical systems approach to turbulence envisions the flow as a trajectory through a high-dimensional state space transiently visiting the neighbourhoods of unstable simple invariant solutions (E. Hopf, Commun. Appl. Maths 1, 303, 1948). […]


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Self-regulating surfaces for efficient liquid collection

Kavli Affiliate: Joanna Aizenberg | First 5 Authors: Christian Machado, Yuehan Yao, Emma Feldman, Joanna Aizenberg, Kyoo-Chul Kenneth Park | Summary: To achieve efficient liquid collection, a surface must regulate incoming liquid accumulation with outgoing liquid transport. Often, this can be proposed to be achieved by functionalizing surfaces with non-wetting characteristics. Yet, there remain fundamental, […]


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Nonlinear waves at the free surface of flexible mechanical metamaterials

Kavli Affiliate: Katia Bertoldi | First 5 Authors: Bolei Deng, Hang Shu, Jian Li, Chengyang Mo, Jordan R. Raney | Summary: In this letter we investigate the propagation of nonlinear pulses along the free surface of flexible metamaterials based on the rotating squares mechanism. While these metamaterials have previously been shown to support the propagation […]


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Nonlinear waves at the free surface of flexible mechanical metamaterials

Kavli Affiliate: Katia Bertoldi | First 5 Authors: Bolei Deng, Hang Shu, Jian Li, Chengyang Mo, Jordan R. Raney | Summary: In this letter we investigate the propagation of nonlinear pulses along the free surface of flexible metamaterials based on the rotating squares mechanism. While these metamaterials have previously been shown to support the propagation […]


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Ultralight and ultra-stiff nano-cardboard panels: mechanical analysis, characterization, and design principles

Kavli Affiliate: Katia Bertoldi | First 5 Authors: Jong-hyoung Kim, Lishuai Jin, Benjamin C. Schafer, Quan Jiao, Katia Bertoldi | Summary: We introduce a class of ultra-light and ultra-stiff sandwich panels designed for use in photophoretic levitation applications and investigate their mechanical behavior using both computational analyses and micro-mechanical testing. The sandwich panels consist of […]


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The physical basis of self-organization of the mammalian oocyte spindle

Kavli Affiliate: Daniel J. Needleman | First 5 Authors: Colm P Kelleher, Daniel J Needleman, , , | Summary: To prepare gametes with the appropriate number of chromosomes, mammalian oocytes undergo two sequential cell divisions. During each division, a large, long-lived, microtubule-based organelle called the meiotic spindle assembles around condensed chromosomes. Although meiotic spindles have […]


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