derniers depôts

Ajouté le 02/03/2020

A discrete-time quantum walk (QW) is essentially a unitary operator driving the evolution of a single particle on the lattice. Some QWs have familiar physics PDEs as their continuum limit. Some slight generalization of them (allowing for prior encoding and larger neighbourhoods) even have the curved spacetime Dirac equation , as their continuum limit. In the (1 + 1)−dimensional massless case, this equation decouples as scalar transport equations with tunable speeds.

Ajouté le 02/03/2020

Measurements of light scattered by particles give insight into their physical properties (solid or liquid, size, shape, complex refractive index). We propose a novel instrument that provides in situ optical light-scattering measurements of aerosols in giant planet atmospheres, particularly in the ice giants Uranus and Neptune.

Ajouté le 28/02/2020

In this paper we propose to generalize the recent works of [4] and [3] on the comparison of the marginal distributions of two strictly stationary processes. Our aim is to test the equality the whole distributions of two such processes. For that task, we compare all possible d dimensional joint distributions of both processes. Our procedure consist in expanding their densities in a multivariate orthogonal basis and comparing their k rst coecients.

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

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

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 28/02/2020

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.

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