Heavy Flavour decay muon production at forward rapidity in pp collisions at \sqrt{s}= 7 TeV and in Pb-Pb collisions at \sqrt{s_{NN}}=2.76 TeV with the ALICE experiment

The production of muons from heavy flavour decays is measured at forward rapidity (2.5 < y < 4) with the muon spectrometer of the ALICE experiment at the LHC. In pp collisions at \sqrt{s} = 7 TeV, the measurement of the transverse momentum and rapidity differential production cross section of muons from heavy flavour decays is carried out from a data sample corresponding to an integrated luminosity of Lint = 16.5 nb^-1 and results are compared to predictions based on perturbative QCD calculations. In Pb-Pb collisions at \sqrt{s_{NN}}= 2.76 TeV, the analysis of a data sample corresponding to an integrated luminosity of Lint = 2.48 \mub^-1 provides a measurement of the ratio of inclusive muon yield in central to peripheral collisions (RCP) as a function of the collision centrality

Quarkonium measurements in Pb-Pb and p-Pb collisions with ALICE at the LHC

The ALICE experiment has measured quarkonium production in Pb-Pb collisions at \sqrt{sNN} = 2.76 TeV and in p-Pb collisions at \sqrt{sNN} = 5.02 TeV. The measurements are performed in the dielectron de- cay channel at mid-rapidity (|yLAB| < 0.9) and in the dimuon decay channel at forward rapidity (2.5 < yLAB < 4). We focus in particular on the J/{\psi} nuclear modification factor measured both in Pb-Pb and p- -Pb collisions and on the {\Upsilon}(1S) nuclear modification factor measured in Pb-Pb collisions

J/{\psi} production in pp collisions and in Pb-Pb collisions at the LHC with the ALICE experiment

We report the recent measurements of the inclusive J/{\psi} production in pp collisions at \sqrt{s} = 2.76 TeV, in pp collisions at \sqrt{s} = 7 TeV and in Pb-Pb collisions at \sqrt{s_{NN}} = 2.76 TeV with the ALICE detector at the LHC. The J/{\psi} mesons are detected down to pT = 0 GeV/c via their di-muon decay channel at forward rapidity (2.5 < y < 4) and via their di-electron decay channel at mid-rapidity (|y| < 0.9). A special emphasis is put on the nuclear modification factor which is compared to the predictions of current J/{\psi} production models

Mesure de la section efficace des hadrons beaux et charmés avec les muons simples dans les collisions p − p à sqrt(s) = 14 TeV avec le spectromètre à muons d'ALICE

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Construction de la LGV SEA Tours-Bordeaux et politique de l'emploi : analyse de la coordination des acteurs publics et privés

International audienceLancée en 2011, la construction de la Ligne à Grande Vitesse Sud Europe Atlantique (LGV SEA) entre Tours et Bordeaux a mobilisé près de 9 000 salariés au plus fort des travaux à l'été 2013. La mobilisation massive de ces ressources humaines a nécessité la mise en oeuvre d'une politique d'emploi et de formation adaptée de la part du constructeur et des parties prenantes au projet. En particulier, le recrutement d'environ 2 000 salariés locaux par le constructeur a été permis par l'instauration de relations partenariales entre acteurs locaux et nationaux de l'emploi et de la formation. En nous inscrivant dans un cadre d'analyse proximiste sur les relations firme/territoire, nous proposons dans cette communication de décrypter la manière dont les coordinations entre acteurs se sont construites et ont abouti à un système de gouvernance locale permettant le recrutement de ces personnels

Tilted Micro Air Jet for Flow Control

In this paper, we present an interesting method to microfabricate a tilted micro air jet generator. We used the well-know deep reactive ion etching (DRIE) technique in order to realize in a silicon substrate a double side etching. For aircraft and cars, micro air jets will take an important place for fluid control. Micro air jets are characterized by their speed, frequency and tilt. Usually, this micro air jets are produced by fluidic microsystems. We presented experimental results about micro tilted air jets. A comparison between finite element method simulation, theory and experimental results are performed to define the microsystem geometry leading a specific air jet angle

Effect of charging on CdSe/CdS dot-in-rods single-photon emission

The photon statistics of CdSe/CdS dot-in-rods nanocrystals is studied with a method involving post-selection of the photon detection events based on the photoluminescence count rate. We show that flickering between two states needs to be taken into account to interpret the single-photon emission properties. With post-selection we are able to identify two emitting states: the exciton and the charged exciton (trion), characterized by different lifetimes and different second order correlation functions. Measurements of the second order autocorrelation function at zero delay with post- selection shows a degradation of the single photon emission for CdSe/CdS dot-in-rods in a charged state that we explain by deriving the neutral and charged biexciton quantum yields.Comment: 10 pages, 5 figure

Toward an equivalence criterion for Hybrid RANS/LES methods

International audienceA criterion is established to assess the equivalence between hybrid RANS/LES methods, called H-equivalence, based on the modeled energy of the unresolved scales, which leads to similar low-order statistics of the resolved motion. Different equilibrium conditions are considered, and perturbation analyses about the equilibrium states are performed. The procedure is applied to demonstrate the equivalence between two particular hybrid methods, and leads to relationships between hybrid method parameters that control the partitioning of energy between the resolved and unresolved scales of motion. This equivalence is validated by numerical results obtained for the cases of plane and periodically constricted channel flows. This concept of H-equivalence makes it possible to view different hybrid methods as models for the same system of equations: as a consequence, detached-eddy simulation (DES), which is shown to be H-equivalent to the temporal partially integrated transport model (T-PITM) in inhomogeneous, stationary situations, can be interpreted as a model for the subfilter stress involved in the temporally filtered Navier–Stokes equations

Reconstruction d'un clone de visage 3D à partir de patchs de forme

National audienceUn clone de visage 3D sémantique peut être utilisé comme prétraitement dans des applications comme l’analyse des émotions.Toutefois, ces clones doivent avoir la forme du visage bien modélisée tout en gardant la spécificité des individus. Dans notre technique, nousutilisons un capteur RVB-Z pour obtenir la spécificité des individus et un modèle déformable de visage 3D pour marquer la forme du visage.Nous gardons les parties appropriées de données de profondeur appelés Patch. Cette sélection est effectuée en utilisant une erreur de distanceet la direction des vecteurs normaux de chaque point. Selon l’emplacement, nous fusionnons soit les données des capteurs soit les donnéesobtenues avec le modèle déformable. Nous comparons notre méthode avec un processus de fitting classique. Les tests qualitatifs montrent quenos résultats sont plus précis qu’une méthode de fitting classique et les tests quantitatifs montrent que notre clone possède à la fois les spécificitésde la personne et la forme du visage bien modélisée