(VF)Quelles sont les relations entre les outils de gestion et la dynamique de l’action collective ? Cet article met en avant le rôle de l’évolution de l’appropriation des outils de gestion par les salariés dans les différentes phases de l’action organisée. La présentation des...

The evolution of the amplitude of two nonlinearly interacting waves is considered, via a set of coupled nonlinear Schrödinger-type equations. The dynamical profile is determined by the wave dispersion laws (i.e. the group velocities and the group velocity dispersion terms) and the nonlinearity...

A two-lane traffic model is presented to investigate traffic jams induced by a car accident. The model is an extension one of the optimal velocity model taking into account lane changing in the open flow. We study the jammed states and the fine structures of jams. It is shown that there are two...