derniers depôts

Ajouté le 26/02/2020

Secret sharing is one of the most important cryptographic protocols. Secret sharing schemes (SSS) have been created to that end. This protocol requires a dealer and several participants. The dealer divides the secret into several pieces (the shares), and one share is given to each participant. The secret can be recovered once a subset of the participants (a coalition) shares their information.

Ajouté le 26/02/2020

Motived by recent ground-based and microgravity experiments investigating the interfacial dynamics of a volatile liquid (FC-72, P r = 12.34) contained in a heated cylindrical cell, we numerically study the thermocapillary-driven flow in such an evaporating liquid layer. Particular attention is given to the prediction of the transition of the axisymmetric flow to fully three-dimensional patterns when the applied temperature increases.

Ajouté le 26/02/2020

In gyrokinetic simulations of turbulent impurity transport, trace impurity species are often treated as passive species, in the sense that they are not included in Maxwell equations. This is consistent with the assumption that impurities with low enough concentrations are impacted by turbulence generated by electrons and main ions, but do not impact it significantly in return.

Ajouté le 22/02/2020

Lytic polysaccharide (mono)oxygenases (LPMOs) perform oxidative cleavage of polysaccharides, and are key enzymes in biomass processing and the global carbon cycle. It has been shown that LPMO reactions may be driven by light, using photosynthetic pigments or photocatalysts, but the mechanism behind this highly attractive catalytic route remains unknown.

Ajouté le 22/02/2020

Approche critique et mise en oeuvre de la méthode d'évaluation contingente : un dialogue entre économiste et sociologue CÉCILIA CLAEYS-MEKDADE, GHISLAIN GENIAUX, STÉPHANE LUCHINI La méthode d'évaluation contingente (MEC) est un outil forgé et mis en pratique par des économistes. Mais elle utilise la technique du questionnaire individuel qui est une des techniques usuelles des sociologues.

Ajouté le 21/02/2020

Nous étudions la faisabilité d’un impôt foncier unique (IFU) sur le patrimoine foncier et immobilier des ménages qui remplacerait tous les impôts existants portant sur ce type de patrimoine, en particulier, la taxe foncière, l’IFI, les DMTO, la taxe sur les plus-values immobilières et l’impôt sur les revenus fonciers perçus par les propriétaires bailleurs.

Ajouté le 21/02/2020

In a context of nuclear Reactivity Initiated Accident, we describe acoustic emission signals, for which a problem of classification is open. As classical approaches with a reduced number of variables do not give satisfactory discrimination, we propose to use the envelopes of the received signals.We perform a k-means clustering and discuss the first results of this approach.

Ajouté le 20/02/2020

A thorough variational multiscale (VMS) modeling of the Navier-Stokes equations is used to compute numerical solutions of the incompressible flow over an open cavity. This case features several competing instabilities, and is highly challenging for VMS methods with regard to frequency and pattern selection, because of the non-normality of the linearized Navier-Stokes operator.

Ajouté le 19/02/2020

Highly anisotropic elliptic problems occur in many physical models that need to be solved numerically. A direction of dominant diffusion is thus introduced (called here parallel direction) along which the diffusion coefficient is several orders larger of magnitude than in the perpendicular one.

Ajouté le 18/02/2020

Selon les projections récentes, les effectifs de médecins libéraux diminueront de 30 % d’ici à 2027 et la densité standardisée diminuerait jusqu’en 2023, créant des poches de sous-densité relativement nombreuses sur le territoire français métropolitain. L’article s’intéresse aux ajustements que les médecins généralistes de ville mettent en œuvre lorsque, sur leur territoire, ils sont d’ores et déjà confrontés à cette raréfaction.

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