ETUDE RETROSPECTIVE D'UNE SERIE DE 260 PATIENTS OPERES SOUS COELIOSCOPIE D'UN REFLUX GASTRO-OESOPHAGIEN (RESULTATS FONCTIONNELS)

TOURS-BU Médecine (372612103) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF

Analyse rétrospective du traitement chirurgical du carcinome hépatocellulaire sur foie non cirrhotique

TOURS-BU Médecine (372612103) / SudocSudocFranceF

Facteurs pronostiques des résections hépatiques curatives pour métastases hépatiques de cancer colorectal

TOURS-BU Médecine (372612103) / SudocSudocFranceF

Analyse des facteurs prédictifs de récidive locorégionale dans le cancer du rectum chez les malades traités par radiothérapie préopératoire et chirurgie

TOURS-BU Médecine (372612103) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF

Facteurs pronostiques des résections hépatiques pour métastases hépatiques de cancers colo rectaux

TOURS-BU Médecine (372612103) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF

Complications des hépatectomies majeures sur foie non cirrhotique (analyse multi variée d'une série rétrospective de 80 patients)

TOURS-BU Médecine (372612103) / SudocSudocFranceF

Fast and spurious: How executives capture governance structures to prevent cooperativization

International audienc

WHAT DOES THE FACTORY’S SUGGESTION BOX REVEAL? An analysis of the design capabilities of a train maintenance centre from its idea management system

International audienceSuggestion boxes have been used in factories to improve processes through a continuous improvement approach. From this perspective, the ideas with direct and quick implementation and visible results are favoured. This paper investigates the nature of design activities hidden behind the ideas suggested. The authors sort 132 ideas from a suggestion box of a French train maintenance center and highlight differences in the processing of the ideas through the suggestion box. The paper shows that a part of the ideas should have been rejected, as they present a gap in the design to be directly implemented. However, they are kept and collectively re-worked to be well adapted to the factory. This enriches literature on creativity and crowd sourcing for and by manufacturing. In particular, it gives a design perspective to innovation and continuous improvement in factory by revealing different design types in the box to fit the production system

Characterization of Nanocomposite Graphene/Polymer Films for Electrical Contact Applications

International audienceThis paper presents a thin nanocomposite film, composed of graphene and of a polymer acting as a binder. The challenge was to realize a conducting, homogeneous and adherent film on a copper based material substrates (CuSn8) used for electrical contacts applications with the aim of reducing corrosion. The first step was to find the right formulation, the deposition process and the post-treatment for the composite. Flakes of graphene were mixed to two different types of high molecular weight polymers in ethanol. The films were deposited by dip-coating of the substrates in the solution; they were then grafted to the substrate by UV curing. Films between 100 nm to 300 nm thick could be deposited. Good adhesion of the film to the substrate was obtained with poly-4-vinylpyridine (P4VP) acting as a binder. The weight ratio of graphene/polymer was important for the homogeneity of the deposited films. The next step was to plate the samples with a nickel layer. Very thin nanometric nickel films were deposited on the graphene/polymer composite by an electroless nickel-boron process (NiB). The nickel nanofilm, a few tens of nanometres thick, was observed to be covering the graphene flakes embedded in the composite. Various techniques were used to characterize the samples: SEM, AFM, conducting AFM, Raman and 4 point sheet resistance measurements. Finally the samples were coated with 1.2 μm of electrolytic nickel and 0.4 μm of electrolytic gold. They were then exposed to nitric acid vapor (NAV) and hypochlorite bleach corrosion tests for several hours. The graphene composite layer was observed to hinder the pore and pitting corrosion on the samples. This process is very versatile and can find many applications in the field of corrosion protection