Zobrazeno 1 - 10
of 389
pro vyhledávání: '"Vitelli, V"'
Measures of the non-Gaussianity of a random field depend on how accurately one is able to measure the field. If a signal measured at a certain point is to be averaged with its surroundings, or coarse-grained, the magnitude of its non-Gaussian compone
Externí odkaz:
http://arxiv.org/abs/1402.6931
We study a chain of anharmonic springs with tunable power law interactions as a minimal model to explore the propagation of strongly non-linear solitary wave excitations in a background of thermal fluctuations. By treating the solitary waves as quasi
Externí odkaz:
http://arxiv.org/abs/1304.6684
Disordered packings of soft grains are fragile mechanical systems that loose rigidity upon lowering the external pressure towards zero. At zero pressure, we find that any infinitesimal strain-impulse propagates initially as a non-linear solitary wave
Externí odkaz:
http://arxiv.org/abs/1304.6692
The interaction of a solitary wave front with an interface formed by two strongly-nonlinear non-cohesive granular lattices displays rich behaviour, characterized by the breakdown of continuum equations of motion in the vicinity of the interface. By t
Externí odkaz:
http://arxiv.org/abs/1303.5890
Autor:
Pairam, E., Vallamkondu, J., Koning, V., van Zuiden, B. C., Ellis, P. W., Bates, M. A., Vitelli, V., Nieves, A. Fernandez
We stabilize nematic droplets with handles against surface-tension-driven instabilities using a yield-stress material as outer fluid and study the complex nematic textures and defect structures that result from the competition between topological con
Externí odkaz:
http://arxiv.org/abs/1212.1771
We present a theoretical study of the director fields and energetics of nematic liquid crystal shells with two pairs of surface defects. The pairs of defects can undergo abrupt transitions between a configuration of maximum separation to at state in
Externí odkaz:
http://arxiv.org/abs/1211.4622
When the equations that govern the dynamics of a random field are nonlinear, the field can develop with time non-Gaussian statistics even if its initial condition is Gaussian. Here, we provide a general framework for calculating the effect of the und
Externí odkaz:
http://arxiv.org/abs/1211.0993
Random fields in nature often have, to a good approximation, Gaussian characteristics. For such fields, the relative densities of umbilical points -- topological defects which can be classified into three types -- have certain fixed values. Phenomena
Externí odkaz:
http://arxiv.org/abs/1211.0643
Random fields in nature often have, to a good approximation, Gaussian characteristics. We present the mathematical framework for a new and simple method for investigating the non-Gaussian contributions, based on counting the maxima and minima of a sc
Externí odkaz:
http://arxiv.org/abs/1210.6871
Publikováno v:
Phys. Rev. E 86, 041302 (2012)
The confining pressure $P$ is perhaps the most important parameter controlling the properties of granular matter. Strongly compressed granular media are, in many respects, simple solids in which elastic perturbations travel as ordinary phonons. Howev
Externí odkaz:
http://arxiv.org/abs/1208.0213