Zobrazeno 1 - 10
of 116
pro vyhledávání: '"Pearce, D. J."'
Topological defects are ubiquitous on surfaces with orientational order fields. Here, we study equilibrium states generated by the feedback between geometry and nematic order on fluid membranes with an integer topological defect. When the Frank elast
Externí odkaz:
http://arxiv.org/abs/2312.16654
During metastatic dissemination, streams of cells collectively migrate through a network of narrow channels within the extracellular matrix, before entering into the blood stream. This strategy is believed to outperform other migration modes, based o
Externí odkaz:
http://arxiv.org/abs/2010.15555
Active matter is characterized by its ability to induce motion by self-generated stress. In the case of a solid, such motion can lead to shape transformations. The stress-generating components can be anisotropic endowing the material with mesoscopic
Externí odkaz:
http://arxiv.org/abs/2010.13141
We investigate the emergence of orientational order among +1/2 disclinations in active nematic liquid crystals. Using a combination of theoretical and experimental methods, we show that +1/2 disclinations have short-range antiferromagnetic alignment,
Externí odkaz:
http://arxiv.org/abs/2004.13704
Autor:
Pearce, D. J. G.
We investigate the effects of extrinsic curvature on the turbulent behavior of a 2D active nematic confined to the surface of a cylinder. The surface of a cylinder has no intrinsic curvatrue and only extrinsic curvature. A nematic field reacts to the
Externí odkaz:
http://arxiv.org/abs/2002.06364
Autor:
Pearce, D. J. G.
Publikováno v:
Phys. Rev. Lett. 122, 227801 (2019)
We investigate the effect of an anisotropic substrate on the turbulent dynamics of a simulated two dimensional active nematic. This is introduced as an anisotropic friction and an effective anisotropic viscosity, with the orientation of the anisotrop
Externí odkaz:
http://arxiv.org/abs/1810.04549
Teams of cooperating sperm have been found across several vertebrate and invertebrate species, ranging from sperm pairs to massive aggregates containing hundreds of cells. Although the biochemical mechanisms involved in the aggregation process are st
Externí odkaz:
http://arxiv.org/abs/1805.12116
Publikováno v:
Phys. Rev. Lett. 122, 168002 (2019)
We investigate the turbulent dynamics of a two-dimensional active nematic liquid crystal con- strained on a curved surface. Using a combination of hydrodynamic and particle-based simulations, we demonstrate that the fundamental structural features of
Externí odkaz:
http://arxiv.org/abs/1805.01455
Autor:
Pearce, D. J. G., Giomi, L.
Publikováno v:
Phys. Rev. E 94, 022612 (2016)
Large collections of autonomously moving agents, such as animals or micro-organisms, are able to 'flock' coherently in space even in the absence of a central control mechanism. While the direction of the flock resulting from this critical behavior is
Externí odkaz:
http://arxiv.org/abs/1511.03652
Autor:
Yorston, M B, Pearce, D J
Publikováno v:
BMJ: British Medical Journal, 2015 Mar . 350
Externí odkaz:
https://www.jstor.org/stable/26520397
