LHCb prospects for full energy and beyond (incl. upgrades)

The LHCb experiment is running at the Large Hadron Collider to study CP violation and rare decays in the beauty and charm sectors. The physics potential is given for five key observables sensitive to new physics in nominal conditions. The motivation and the strategy of the upgrade envisaged for 2016 is presented with the expected performance for an integrated luminosity of 50 1/fb.Comment: 5 pages, 2 figures, Proceeding of the HCP2010 conferenc

Thermooxidative aging of polydicyclopentadiene in glassy state

Thermal aging of thin films of unstabilized polydicyclopentadiene (pDCPD) at several temperatures ranging from 120 to 30 C was investigated by means of carbonyl build up by FTIR with ammonia derivatization, double bond titration, mass uptake measurement, hydroperoxides titration by iodometry and DSC coupled with sulfur dioxide treatment. In the temperature range under investigation, pDCPD is in glassy state and it oxidizes faster than common polymers oxidized at rubbery state (e.g. polydienic elastomers). Using the kinetic analysis, these results were ascribed to increased initiation rate due to catalyst residues, some possible intramolecular processes favoring propagation, or a very low termination rate of oxidation radical chains because of the control of termination reactions by macroradical diffusion

1987 UNOPA Winter Workshop Effective Presentations The Power Behind Persuasion

Le genre et la guerre : Les femmes, la virilité, et la violence / Gender and War: Women, Masculinities, and Violence Journée d'études organisée par Brian Sandberg (IEA de Paris) and Marion Trévisi (Université de Picardie)   à l’Institut d’Études Avancées de Paris Hôtel de Lauzun, 17 quai d’Anjou, 75004 Paris 8 juin 2015   appel à communications / call for papers   This conference at the Institut d’Études Avancées de Paris will challenge the notion that warfare is an intrinsically masculine do..

Controlled Cavitation in Microfluidic Systems

We report on cavitation in confined microscopic environments which are commonly called microfluidic or lab-on-a-chip systems. The cavitation bubble is created by focusing a pulsed laser into these structures filled with a light-absorbing liquid. At the center of a 20 µm thick and 1 mm wide channel, pancake-shaped bubbles expand and collapse radially. The bubble dynamics compares with a two-dimensional Rayleigh model and a planar flow field during the bubble collapse is measured. When the bubble is created close to a wall a liquid jet is focused towards the wall, resembling the jetting phenomenon in axisymmetry. The jet flow creates two counter-rotating vortices which stir the liquid at high velocities. For more complex geometries, e.g., triangle- and square-shaped structures, the number of liquid jets recorded correlates with the number of boundaries close t

Oxidation of unvulcanized, unstabilized polychloroprene: A kinetic study

Thermal oxidation in air at atmospheric pressure, in the 80-140 °C temperature range and in oxygen at 100 °C in the 0.02-3 MPa pressure range, of unvulcanized, unstabilized, unfilled polychloroprene (CR) has been characterized using FTIR and chlorine concentration measurement. The kinetic analysis was focused on double bond consumption. A mechanistic scheme involving unimolecular and bimolecular hydroperoxide decomposition, oxygen addition to alkyl radicals, hydrogen abstraction on allylic methylenes, alkyl and peroxyl additions to double bonds and terminations involving alkyl and peroxy radicals was elaborated. The corresponding rate constants were partly extracted from the literature and partly determined from experimental data using the kinetic model derived from the mechanistic scheme in an inverse approach. Among the specificities of polychloroprene, the following were revealed: The rate of double bond consumption is a hyperbolic function of oxygen pressure that allows a law previously established for the oxidation of saturated substrates to be generalized. CR oxidation is characterized by the absence of an induction period that reveals the instability of hydroperoxides. The kinetic analysis also reveals that peroxyl addition is faster than hydrogen abstraction but slower in CR than in common hydrocarbon polydienes

Prosodic manifestations of politeness in Porteño Spanish wh-interrogatives: terminal contours, f0 mitigation and syllable durations

International audiencePoliteness is often described as being prosodically cued through higher F0, as per the Frequency Code premises [12-14, 21, 25], and a slower speech rate [10, 11, 15, 16, 18, 20, 23, 27]. In Porteño Spanish, opposite findings [2, 6, 8] regarding wh-interrogatives' pitch contours were attributed to a mark of politeness. The analysis of 280 wh-interrogatives produced by nine speakers of Porteño Spanish, within colloquial and polite contexts, allowed us to determine that politeness does not actually favour higher F0. On the contrary, politeness is expressed by F0 mitigation through lowered overall pitch and reduced span. Our results also refute [26]'s hypothesis that interrogative adverbs would make utterances containing them more sensitive to politeness. In Porteño Spanish, adverbs do not pilot rising terminal contours to signal politeness. As for syllable durations, lengthening did not occur and speech rate kept constant in our corpus in the polite condition

Water clustering in polychloroprene

Water sorption has been studied gravimetrically for polychloroprene rubber samples, first at a fixed hygrometric ratio (98% HR) and several temperatures (25, 40, 60 and 80 °C) for samples of 1.8 and 3.8 mm thickness (Constant Temperature and Hygrometry, CTH experiments), then at fixed temperature (40 °C) and several hygrometric ratios ranging from 0 to 95% HR on samples of 0.1 mm thickness (DVS experiments). CTH experiments reveal an abnormal sorption behavior: after an apparently fickian transient period, the water absorption continues at almost constant rate, no equilibrium is observed after more than 2500 h, whatever the temperature. DVS experiments reveal a very low Henry's solubility but the formation of clusters at water activities higher than 40%. The water diffusivity is almost independent of activity below 50% HR and decreases rapidly when activity increases above 50%. Contrary to CTH experiments, equilibrium is reached in DVS and the difference is not simply linked to the well-known effect of sample thickness on diffusion rate. The results allow hypotheses such as hydrolysis or osmotic cracking to explain the abnormal sorption phenomenon to be rejected. It is suggested that clusters could be polymer-water complexes having a linear/branched structure able to grow without phase separation that could explain the reversibility of sorption-desorption cycles. The difference of behavior between thin 0.1 mm and thicker 1.8 or 3.8 mm samples could be due to an effect of swelling stresses