Les Gilets jaunes est un mouvement de protestation, toujours en cours, qui a débuté novembre 2018 sous la forme notamment manifestations et d’occupations ronds-points sur tout le territoire français. Cet article analyse les expériences du maintien l’ordre chez manifestants comment au fil des situations manifestations, ont découvert puis thématisé problème « violences policières ». Après avoir d...

1 Abstract Self-consistent mouvement of initial perturbation in density, velocity and grav-itation potentail on the background of the stationary cylindrical configuration of the gas with gravitation and pressure in Lagrange variables have been studied. The nonlinear partial differential equation for description radius motion has been obtained. The linearization of this equation is reduced to a ...

We present some uniqueness (non-fattening) results for the motion by mean curvature perturbed by stochastic noise. It is well known that for special initial data, the deterministic motion has multiple solutions, i.e., it develops interior. Our result for a particular evolution of curves in R2 illustrates that stochastic perturbations can select a unique solution in a natural way. The noise we u...

– In this paper we study the Brownian taboo process, which is a version of Brownian motion conditioned to stay within a finite interval, and the α-perturbed Brownian taboo process, which is an analogous version of an α-perturbed Brownian motion.We are particularly interested in the asymptotic behaviour of the supremum of the taboo process, and our main results give integral tests for upper and ...

In this paper, we propose a new method to extract moving objects from a video stream without any motion estimation. The objective is to obtain a fast and efficient extraction method, robust to noise and large motions. Our approach consists in a frame differencing strategy combined with a hierarchical segmentation approach. First, we propose to extract moving edges with a new difference scheme, ...

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We consider the two-body problem in post-Newtonian approximations of general relativity. We report the recent results concerning the equations of motion, and the associated Lagrangian formulation, of compact binary systems, at the third post-Newtonian order (∼ 1/c beyond the Newtonian acceleration). These equations are necessary when constructing the theoretical templates for searching and anal...

We use the language of errors to handle local Dirichlet forms with squared field operator (cf [2]). Let us consider, under the hypotheses of Donsker theorem, a random walk converging weakly to a Brownian motion. If, in addition, the random walk is supposed to be erroneous, the convergence occurs in the sense of Dirichlet forms and induces the Ornstein-Uhlenbeck structure on the Wiener space. Th...

The equations of motion of compact binary systems have been derived in the post-Newtonian (PN) approximation of general relativity. The current level of accuracy is 3.5PN order. The conservative part of the equations of motion (neglecting the radiation reaction damping terms) is deducible from a generalized Lagrangian in harmonic coordinates, or equivalently from an ordinary Hamiltonian in ADM ...