Résumé— L’approche de transformée opérationnelle (TO) est l'une des meilleurs techniques qui permet de supporter la collaboration dans les environnements mobiles et distribués. Les éditeurs collaborative en temps réel utilisent cette technique pour la réconciliation des données modifiées simultanément par plusieurs utilisateurs. Cependant, l’approche TO utilise un log qui peut atteindre une tai...

This paper considers the redeployment problem for a fleet of ambulances. This problem is encountered in the real-time management of emergency medical services. A dynamic model is proposed and a dynamic ambulance management system is described. This system includes a parallel tabu search heuristic to precompute redeployment scenarios. Simulations based on real-data confirm the efficiency of the ...

As a consequence of the rapid growth of temporary agency employment in Germany, the debate on the poor working conditions of temps, specifically their remuneration, has intensified recently. The paper shows that the wage gap for German temp workers is rather large and varies between occupation and region. But temps already suffer from a marked wage decline before entering the temporary help sec...

— Let X be a Riemannian symmetric space of the noncompact type. We prove that the solution of the time-dependent Schrödinger equation on X with square integrable initial condition f is identically zero at all times t whenever f and the solution at a time t0 > 0 are simultaneously very rapidly decreasing. The stated condition of rapid decrease is of Beurling type. Conditions respectively of Gelf...

We are interested in the discretization of parabolic equations, either linear or semilinear, by an implicit Euler scheme with respect to the time variable and finite elements with respect to the space variables. The main result of this paper consists of building error indicators with respect to both time and space approximations and proving their equivalence with the error, in order to work wit...

VOUZZAVEDIBISAR Fantaisie Edmond Bianco Quand je tirais le dernier bord, mon petit voilier s'approcha lentement de la côte, je donnais un petit coup de barre pour la longer en cherchant où aborder. Et en même temps je lâchais le foc et la grand'voile. La terre à une dizaine de mètres par trois mètres de fond, une étroite plage de sable, mais aussi pas mal de petits rochers, je ne pouvais aborde...

The aim of this paper is to show that, for a linear second-order hyperbolic equation discretized by the backward Euler scheme in time and continuous piecewise linear finite elements in space, the adaptation of the time steps can be combined with spatial mesh adaptivity in an optimal way. We derive a priori and a posteriori error estimates which admit, as much as it is possible, the decoupling o...

Tissue engineered medical products (TEMPs) are often three-dimensional (3D) hybrid materials consisting of a porous scaffold upon which the tissue is grown. However, monitoring of the developing tissue deep within the scaffold is hampered by its turbidity. We have sought new ways to probe the interior of the scaffold with the same resolution as conventional laser scanning confocal microscopy bu...