AGAPEROS: Searching for variable stars in the LMC Bar with the Pixel Method. I. Detection, astrometry and cross-identification

We extend the work developed in previous papers on microlensing with a selection of variable stars. We use the Pixel Method to select variable stars on a set of 2.5 x 10**6 pixel light curves in the LMC Bar presented elsewhere. The previous treatment was done in order to optimise the detection of long timescale variations (larger than a few days) and we further optimise our analysis for the selection of Long Timescale and Long Period Variables (LT&LPV). We choose to perform a selection of variable objects as comprehensive as possible, independent of periodicity and of their position on the colour magnitude diagram. We detail the different thresholds successively applied to the light curves, which allow to produce a catalogue of 632 variable objects. We present a table with the coordinate of each variable, its EROS magnitudes at one epoch and an indicator of blending in both colours, together with a finding chart. A cross-correlation with various catalogues shows that 90% of those variable objects were undetected before, thus enlarging the sample of LT&LPV previously known in this area by a factor of 10. Due to the limitations of both the Pixel Method and the data set, additional data -- namely a longer baseline and near infrared photometry -- are required to further characterise these variable stars, as will be addressed in subsequent papers.Comment: 11 pages with 10 figure

L’entreprise sociale – SCIC entre intégration et tensions : le cas du secteur culturel

International audienc

Musiques actuelles, ça part en live

Dans un contexte de crise qui déstabilise toute la filière musicale, cet ouvrage propose une analyse précise de l’économie des concerts de variété et de musiques actuelles. Du producteur à la salle de spectacle ou au festival, il décrit l’organisation de la chaîne d’acteurs qui contribuent à la réalisation d’un spectacle et les relations contractuelles qui les lient, variables selon le degré de notoriété des artistes. De tailles et de statuts très divers, les structures de spectacle vivant investies dans les musiques actuelles forment un ensemble hétérogène et fragile dont l’organisation diffère sensiblement de celle des pays anglo-saxons. La France se singularise par le rôle du producteur « employeur du plateau artistique ». Les auteurs soulignent les interdépendances croissantes entre les acteurs de l’industrie phonographique et de l’organisation de concerts, qui se traduisent par d’importants mouvements de concentration. De nouveaux acteurs – majors du disque, multinationales de l’entertainement ou de la communication – occupent désormais des positions stratégiques. L’ouvrage met également en avant les complémentarités entre circuits, commerciaux, associatifs et publics, qui contribuent, chacun à des stades différents de la carrière des artistes, à la valorisation de la musique

Atomic transfers between implanted bioceramics and tissues in orthopaedics surgery

We study transfers of ions and debris from bioceramics implanted in bone sites. A contamination of surrounding tissues may play a major role in aseptic loosening of the implant. For these reasons, bioceramics require studies of biocompatibility and biofunctionality . So, in addition to in vitro studies of bioceramics, it is essential to implant them in vivo to know body reactions. We measured the concentration of mineral elements at different time intervals after implantation over a whole cross-section. We found a discontinuity of the mineral elements (Ca, P, Sr, Zn, Fe) at the interface between the implant and the receiver. The osseous attack is not global but, on the contrary, centripetal. Moreover, the fit of the concentration time course indicates that the kinetics of ossification is different for each atomic element and characterizes a distinct biological phenomeno

Properties of two biological glasses used as metallic prosthesis coatings and after an implantation in body

présentation faite par Y. Barbottea

Nasal carriage of Staphylococcus aureus in dairy sheep.

International audienceThe purpose of this study was to assess the prevalence of Staphylococcus aureus nasal carriage of dairy sheep in farms producing cheeses manufactured with raw ewe's milk. The study showed that 29% of ewes carried S. aureus in their nares. The genetic diversity of the 136 isolates recovered from the anterior nares of the ewes, from the ambient air of the milking parlour and from cheeses was investigated using pulsed-field gel electrophoresis (PFGE) of DNA SmaI digests. The genotyping results showed that 75 out of 106 isolates recovered from nasal carriage in dairy sheep belonged to a dominant pattern (previously named OV) and a genetically related pattern (named OV'). The same profile (OV or OV') was found in the ambient air and cheeses, suggesting a continuum between isolates within these different compartments