22 research outputs found

    Weak in Space, Log in Time Improvement of the Lady{\v{z}}enskaja-Prodi-Serrin Criteria

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    In this article we present a Lady{\v{z}}enskaja-Prodi-Serrin Criteria for regularity of solutions for the Navier-Stokes equation in three dimensions which incorporates weak LpL^p norms in the space variables and log improvement in the time variable.Comment: 14 pages, to appea

    Suivi de la qualitĂ© des eaux d'alimentation en cours de traitement : intĂ©rĂȘt des tests biologiques de toxicitĂ©

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    Le contrÎle de la qualité des eaux d'alimentation se limitait, jusqu'à ces derniÚres années, au seul aspect analytique. Actuellement, face au nombre sans cesse croissant de composés chimiques susceptibles de contaminer les eaux, l'analyse n'est plus toujours suffisante. De plus, elle ne permet pas d'apprécier les effets synergiques ou antagonistes qui peuvent résulter de la présence simultanée de plusieurs polluants, ni de prévoir leur devenir au cours des traitements. Dans bien des cas, il est difficile d'évaluer le risque toxique potentiel pour le consommateur. Les essais biologiques de toxicité, déjà développés dans le cadre des eaux rési-duaires, permettent une approche plus globale des effets toxiques. Leur application à l'étude de la qualité des eaux d'alimentation est plus délicate en raison de leur faible charge polluante. Néanmoins, quelques uns d'entre eux, particuliÚrement sensibles, sont utilisables sans concentration préalable. A titre comparatif, plusieurs tests de toxicité à court et à moyen terme ont été pratiqués sur les eaux d'une station de potabilisation d'eau de surface aux différents stades de traitement. Parmi les bio essais expérimentés, le test de cytotoxicité basé sur la mesure de la vitesse de synthÚse d'ARN s'est avéré le mieux adapté à ce type d'étude

    Observation of the decay B0 ---> rho+ rho- and measurement of the branching fraction and polarization

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    We have observed the rare decay B-0-->rho(+)rho(-) in a sample of 89 million B (b) over bar pairs recorded with the BABAR detector. The number of observed events is 88(-21)(+23)+/-9, with a significance of 5.1 standard deviations with systematic uncertainties included. The branching fraction and the longitudinal polarization are measured to be B(B-0-->rho(+)rho(-))=(25(-6-6)(+7+5))x10(-6) and Gamma(L)/Gamma=0.98(-0.08)(+0.02)+/-0.03, respectively

    Snowmass Neutrino Frontier: DUNE Physics Summary

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    The Deep Underground Neutrino Experiment (DUNE) is a next-generation long-baseline neutrino oscillation experiment with a primary physics goal of observing neutrino and antineutrino oscillation patterns to precisely measure the parameters governing long-baseline neutrino oscillation in a single experiment, and to test the three-flavor paradigm. DUNE's design has been developed by a large, international collaboration of scientists and engineers to have unique capability to measure neutrino oscillation as a function of energy in a broadband beam, to resolve degeneracy among oscillation parameters, and to control systematic uncertainty using the exquisite imaging capability of massive LArTPC far detector modules and an argon-based near detector. DUNE's neutrino oscillation measurements will unambiguously resolve the neutrino mass ordering and provide the sensitivity to discover CP violation in neutrinos for a wide range of possible values of ÎŽCP\delta_{CP}. DUNE is also uniquely sensitive to electron neutrinos from a galactic supernova burst, and to a broad range of physics beyond the Standard Model (BSM), including nucleon decays. DUNE is anticipated to begin collecting physics data with Phase I, an initial experiment configuration consisting of two far detector modules and a minimal suite of near detector components, with a 1.2 MW proton beam. To realize its extensive, world-leading physics potential requires the full scope of DUNE be completed in Phase II. The three Phase II upgrades are all necessary to achieve DUNE's physics goals: (1) addition of far detector modules three and four for a total FD fiducial mass of at least 40 kt, (2) upgrade of the proton beam power from 1.2 MW to 2.4 MW, and (3) replacement of the near detector's temporary muon spectrometer with a magnetized, high-pressure gaseous argon TPC and calorimeter
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