Zobrazeno 1 - 10
of 346
pro vyhledávání: '"M. Cristina Marchetti"'
Publikováno v:
Royal Society Open Science, Vol 10, Iss 2 (2023)
We study the dynamics of topological defects in active nematic films with spatially varying activity and consider two set-ups: (i) a constant activity gradient and (ii) a sharp jump in activity. A constant gradient of extensile (contractile) activity
Externí odkaz:
https://doaj.org/article/2e8cdcd6c3b743eab3594008a9647f96
Publikováno v:
Frontiers in Physics, Vol 10 (2022)
Boundary conditions dictate how fluids, including liquid crystals, flow when pumped through a channel. Can boundary conditions also be used to control internally driven active fluids that generate flows spontaneously? By using numerical simulations a
Externí odkaz:
https://doaj.org/article/9b9d8b9487a449829f535a890d9363b0
Publikováno v:
Physical Review X, Vol 12, Iss 1, p 010501 (2022)
The name active matter refers to any collection of entities that individually use free energy to generate their own motion and forces. Through interactions, active particles spontaneously organize in emergent large-scale structures with a rich range
Externí odkaz:
https://doaj.org/article/bc24f50414134dc89e77e6f63eea8502
Publikováno v:
Biophysics Reviews. 4
The integrity of epithelia is maintained within dynamic mechanical environments during tissue development and homeostasis. Understanding how epithelial cells mechanosignal and respond collectively or individually is critical to providing insight into
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa455da6143a58c5910199a2438a4a65
https://doi.org/10.1063/5.0142537
https://doi.org/10.1063/5.0142537
Publikováno v:
Soft Matter
The vertex model of epithelia describes the apical surface of a tissue as a tiling of polygonal cells, with a mechanical energy governed by deviations in cell shape from preferred, or target, area, $A_0$, and perimeter, $P_0$. The model exhibits a ri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a2cb2ffb1b72132f7845f63a8a239d7a
https://hdl.handle.net/21.11116/0000-000D-2FE9-921.11116/0000-000D-2FE7-B
https://hdl.handle.net/21.11116/0000-000D-2FE9-921.11116/0000-000D-2FE7-B
Publikováno v:
New Journal of Physics, Vol 23, Iss 3, p 033009 (2021)
We adapt the Halperin–Mazenko formalism to analyze two-dimensional active nematics coupled to a generic fluid flow. The governing hydrodynamic equations lead to evolution laws for nematic topological defects and their corresponding density fields.
Externí odkaz:
https://doaj.org/article/c8d5ff1c86d94875b2e88e3a0daac8f0
Publikováno v:
Royal Society Open Science. 10
We study the dynamics of topological defects in active nematic films with spatially varying activity and consider two set-ups: (i) a constant activity gradient and (ii) a sharp jump in activity. A constant gradient of extensile (contractile) activity
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8bed8db5b3bfb02edd462ec0b42cbf0d
https://doi.org/10.1098/rsos.221229
https://doi.org/10.1098/rsos.221229
Autor:
Suraj Shankar, M. Cristina Marchetti
Publikováno v:
Physical Review X, Vol 9, Iss 4, p 041047 (2019)
Topological defects play a prominent role in the physics of two-dimensional materials. When driven out of equilibrium in active nematics, disclinations can acquire spontaneous self-propulsion and drive self-sustained flows upon proliferation. Here, w
Externí odkaz:
https://doaj.org/article/65ae9f3f5c7d44b3ad9b2d54984f8b51
Publikováno v:
Shankar, S, Souslov, A, Bowick, M J, Marchetti, M C & Vitelli, V 2022, ' Topological active matter ', Nature Reviews Physics, vol. 4, no. 6, pp. 380-398 . https://doi.org/10.1038/s42254-022-00445-3
Active matter encompasses different nonequilibrium systems in which individual constituents convert energy into non-conservative forces or motion at the microscale. This review provides an elementary introduction to the role of topology in active mat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9cb1996167c788f0c84e4e41f4e4d309
https://purehost.bath.ac.uk/ws/files/219779615/2010.00364v2.pdf
https://purehost.bath.ac.uk/ws/files/219779615/2010.00364v2.pdf
Publikováno v:
Physical Review E
Vertex models, such as those used to describe cellular tissue, have an energy controlled by deviations of each cell area and perimeter from target values. The constrained nonlinear relation between area and perimeter leads to new mechanical response.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a1ddcad46568b660393c90fc7e5d2290
https://doi.org/10.1103/physreve.105.064611
https://doi.org/10.1103/physreve.105.064611