Zobrazeno 1 - 10
of 274
pro vyhledávání: '"Levine, Alex J."'
We examine the nonequilibrium production of topological defects -- braids -- in semiflexible filament bundles under cycles of compression and tension. During these cycles, the period of compression facilitates the thermally activated pair production
Externí odkaz:
http://arxiv.org/abs/2105.12879
Autor:
Slepukhin, Valentin M, Levine, Alex J
Publikováno v:
Phys. Rev. Lett. 127, 157801 (2021)
We discuss the response of biopolymer filament bundles bound by transient cross linkers to compressive loading. These systems admit a mechanical instability at stresses typically below that of traditional Euler buckling. In this instability, there is
Externí odkaz:
http://arxiv.org/abs/2103.08832
The preB\"otzinger Complex, the mammalian inspiratory rhythm generator, encodes inspiratory time as motor pattern. Spike synchronization throughout this sparsely connected network generates inspiratory bursts albeit with variable latencies after prei
Externí odkaz:
http://arxiv.org/abs/2012.12486
Autor:
Slepukhin, Valentin M., Grill, Maximilian J., Hu, Qingda, Botvinick, Elliot L., Wall, Wolfgang A., Levine, Alex J.
Bundles of stiff filaments are ubiquitous in the living world, found both in the cytoskeleton and in the extracellular medium. These bundles are typically held together by smaller cross-linking molecules. We demonstrate analytically, numerically and
Externí odkaz:
http://arxiv.org/abs/2011.11809
Autor:
Kernes, Jonathan, Levine, Alex J.
Publikováno v:
Phys. Rev. E 103, 053002 (2021)
We consider the propagation of flexural waves across a nearly flat, thin membrane, whose stress-free state is curved. The stress-free configuration is specified by a quenched height field, whose Fourier components are drawn from a Gaussian distributi
Externí odkaz:
http://arxiv.org/abs/2011.07152
Autor:
Grill, Maximilian J., Kernes, Jonathan, Slepukhin, Valentin M., Wall, Wolfgang A., Levine, Alex J.
We consider the propagation of tension along specific filament of a semiflexible filament network in response to the application of a point force using a combination of numerical simulations and analytic theory. We find the distribution of force with
Externí odkaz:
http://arxiv.org/abs/2006.15192
Autor:
Kernes, Jonathan, Levine, Alex J.
Publikováno v:
Phys. Rev. E 103, 013002 (2021)
The mechanics of lower dimensional elastic structures depends strongly on the geometry of their stress-free state. Elastic deformations separate into in-plane stretching and lower energy out-of-plane bending deformations. For elastic structures with
Externí odkaz:
http://arxiv.org/abs/2006.13383
Autor:
Kernes, Jonathan, Levine, Alex J.
We study the dynamics of a single semiflexible filament coupled to a Hookean spring at its boundary. The spring produces a fluctuating tensile force on the filament, whose value depends on the filament's instantaneous end-to-end length. The spring th
Externí odkaz:
http://arxiv.org/abs/2006.10251
Publikováno v:
Phys. Rev. E 101, 062307 (2020)
We explore the dynamics of the preB\"{o}tzinger complex, the mammalian central pattern generator with $N \sim 10^3$ neurons, which produces a collective metronomic signal that times the inspiration. Our analysis is based on a simple firing-rate model
Externí odkaz:
http://arxiv.org/abs/2001.02868
Autor:
Kernes, Jonathan, Levine, Alex J.
Publikováno v:
Phys. Rev. E 101, 012408 (2020)
We examine the equilibrium fluctuation spectrum of a constituent semiflexible filament segment in a network. The effect of this cross linking is to modify the mechanical boundary conditions at the end of the filament. We consider the effect of both t
Externí odkaz:
http://arxiv.org/abs/1909.02033