Occupational Health Problem Network : the Exposome

We present a thinking on the concept of relational networks applied to the french national occupational disease surveillance and prevention network (R\'eseau National de Vigilance et de Pr\'evention des Pathologies Professionnelles, RNV3P). This approach consists in searching common exposures to occupational health problems

Theatre Photography in Nineteenth Century France: Document, Archive or Pure Fiction?

Indoor performance photography, which was born in France on the occasion of the Paris World Exhibition in 1889, remains a problematic theatrical and  media object to this day. But at the Belle Epoque and until the Second World War at least, it requires to be approached with all the more caution because it  is always the fruit of multiple manipulations, either at the time of the making of the shots (mandatory posing of actors, specific lighting, etc.), or at the time  of their “post-production” (printing, but especially edition in review or volume). A complex and particularly rich object that must be studied in its context  (publications or archives), stage photography is then offered as much as a document to be deciphered as a fiction to be deconstructed

Dynamic pricing rule and R&D

This article models the intertemporal behaviour of a firm that sets product prices and simultaneously invests in R&D. The model shows that the dynamic pricing rule follows the evolution of the production cost and is independent of the evolution of the product quality. Thus, process innovation, which reduces production cost, is the main determinant of a firm's pricing policy over time. Moreover, the firm invests more in process innovation over time at the expense of product innovation. Hence, the model explains the decrease in the cost of production and in the price of technological products throughout their life cycle.Dynamic pricing, R&D, optimal control

Hot Forging of a Cladded Component by Automated GMAW Process

Weld cladding is employed to improve the service life of engineering components by increasing corrosion and wear resistance and reducing the cost. The acceptable multi-bead cladding layer depends on single bead geometry. Hence, in first step, the relationship between input process parameters and the single bead geometry is studied and in second step a comprehensive study on multi bead clad layer deposition is carried out. This paper highlights an experimental study carried out to get single layer cladding deposited by automated GMAW process and to find the possibility of hot forming of the cladded work piece to get the final hot formed improved structure. The experiments for single bead were conducted by varying the three main process parameters wire feed rate, arc voltage and welding speed while keeping other parameters like nozzle to work distance, shielding gas and its flow rate and torch angle constant. The effect of bead spacing and torch orientation on the cladding quality of single layer from the results of single bead deposition was studied. A hot bending test at different temperatures of cladded plates with different dilution and nominal energy carried out

Voies/voix du silence dans L’espérance-macadam de Gisèle Pineau

Cet article propose une analyse sémio-narrative de L’espérance-macadam dont le personnage principal, Éliette, est enfermé dans une mémoire traumatique dépourvue de tout souvenir. Sa vie s’est écoulée dans l’absence de gestes et de mots, mais à l’écoute du tissu d’horreurs qu’est la vie de son village, Savane Mulet. Livrée au chaos, Éliette se retrouve dans un lieu autre, transférentiel, où, sans passer par les mots, elle écoute, sans le reconnaître, l’écho de ses souffrances. Le texte se fait traversée et tragédie du désir d’une Éliette « agoniste » pour qui le plaisir a rejoint son au-delà : l’angoisse et la mort. La levée du voile sur la scène du refoulé lui permettra de survivre à ce voyage qui l’emprisonne dans l’étau du trauma et de retrouver ce qui était dormant en elle : le désir de rejoindre l’autre pour, enfin, sentir la vie éclore en elle.This article proposes a semio-narrative analysis of L’espérance-macadam [Macadam Dreams], whose main character, Éliette, is imprisoned by traumatic memory and lacks all power of recall. She has spent her days in stony silence, listening to the web of horrors that constitutes life in her village, Savane Mulet. Abandoned to chaos, Éliette finds herself in a different, transferential venue where she listens silently, unrecognizingly, to the echo of her sufferings. The text becomes the journey and tragedy of an Éliette agoniste for whom pleasure has achieved its ultimate transcendence—anguish and death. When the veil is lifted on the repressed memory, she will find the strength to survive this journey holding her in the vise-like grip of trauma and rediscover what lies dormant within her—the desire to reach the other and feel, at last, life burgeoning within her

Consideration of residual stress and geometry during heat treatment to decrease shaft bending

In automotive industry, heat treatment of components is implicitly related to distortion. This phenomenon is particularly obvious in the case of gearbox parts because of their typical geometry and precise requirements. Even if distortion can be anticipated to an extent by experience, it remains complex to comprehend. Scientific literature and industrial experience show that the whole manufacturing process chain has an influence on final heat treatment distortions. This paper presents an approach to estimate the influence of some factors on the distortion, based on the idea of a distortion potential taking into account not only geometry but also the manufacturing process history. Then the idea is developed through experiments on an industrial manufacturing process to understand the impact of residual stress due to machining on shaft bending and teeth distortion during heat treatment. Instead of being measured, residual stress is being neutralized. By comparing lots between each other, connections between gear teeth geometry and manufacturing steps before heat treatment are obtained. As a consequence, geometrical nonconformities roots can be determined more easily thanks to this diagnosis tool, and corrective actions can be applied. Secondly, the influence of product geometry on bending is experimentally considered. Moreover, metallurgical observations enable to explain the influence of workpieces geometry on shaft bending. Thanks to the obtained results, process and product recommendations to decrease shafts bending are proposed