An ad hoc network is a collection of mobile devices that communicate in a self organized wayusing wireless network interfaces without neither centralized administration nor fixed infrastruc-ture. In such a network, nodes must cooperate with each other so as to extend their transmissionrange to reach distant nodes. This cooperation requires a specific ad hoc routing protocol to es-<l...

Abstract Marketing has become accepted and proven in science practice over the past decades. Many principles of marketing have self-evident, but led to gross generalizations simplified thought patterns. This article examines myths metaphors marketing. A distinction is made between managerial behavioral In both sub-disciplines, we are often dealing with complex invisible phenomena that occur a v...

RÉSUMÉ. Cet article propose une revue de littérature des récentes avancées en estimation robuste de matrices de dispersion vue sous l’angle de la théorie des grandes matrices aléatoires. Une exposition des résultats théoriques sera effectuée avant de proposer des applications aux domaines des statistiques et du traitement du signal. Les résultats théoriques montrent qu’alors que les estimateurs...

R esum e. Il est bien connu que la m ethode de Newton, lorsqu'appliqu ee a un probl eme d'in equation variationnelle fortement monotone, converge localement vers la solution de l'in equation, et que l'ordre de convergence est quadratique. Dans cet article nous mon-trons que la direction de Newton constitue une direction de descente pour un objectif non dii erentiable et non convexe, et ceci m^ ...

We consider the implicit time integration of the compressible Navier-Stokes equations. Each implicit step involves the solution of a costly non linear system. In this paper, we deene a preconditioner to solve each linear system more cheaply within the framework of matrix-free algorithm. The main idea is to reuse the Krylov subspace across the time steps. We demonstrate some properties of the pr...

The force and the deceptive nature of the fallacy of equivocation lies in its dialectical nature. The speaker redefines a word in order to classify a fragment of reality, while the hearer draws a conclusion based on the ordinary meaning of such a classification. This difference between the interlocutors’ meanings is grounded on a crucial epistemic gap: how is it possible to know our hearer’s mi...

The Blue Calculus is a direct extension of both the lambda and the pi calculi. In a preliminary work from GGrard Boudol, a simple type system was given that incorporates Curry's type inference for the lambda-calculus. In the present paper we study an implicit polymorphic type system, adapted from the ML typing discipline. Our typing system enjoys subject reduction and principal type properties ...

The time-dependent Stokes equations in twoor three-dimensional bounded domains are discretized by the backward Euler scheme in time and finite elements in space. The error of this discretization is bounded globally from above and locally from below by the sum of two types of computable error indicators, the first one being linked to the time discretization and the second one to the space discre...

In this paper, we study a nite volume approximation of a nonlinear hyperbolic equation with source term q where q is a C 1 function from IR 3 to IR, nonincreasing w.r.t. the third variable with a third derivative which is bounded. We also suppose that q(:; :; 0) 0. We suppose that u0 is in BV (IR N). We use an explicit scheme with an implicit discretization for the source term. The aim of this ...