Lucien Herr bibliothécaire

Mémoire de fin d\u27étude du diplôme de conservateur, promotion DCB19, portant sur Lucien Herr, bibliothécaire (1864-1926)

Les logiciels embarqués assurant les services de communication dans l'automobile - Contribution au Livrable 1.2 du projet SCARLET

Nous nous intéressons à la configuration des services de communication qui sont intégrés dans les logiciels ; ces services assurent les échanges entre composants applicatifs et ce de manière trans-parente vis-à-vis de la distribution de ces composants sur une plate-forme distribuée ; les composants logiciels applicatifs émettent et consomment des signaux tandis que sur le système de com-munication sont transmises des trames selon une politique induite par le protocole d'accès au mé-dium (MAC). Nous proposons dans ce document un état de l'art sur les techniques qui permettent 1) de configurer ces services et 2) d'améliorer leur robustess

Réforme des autorisations de prélèvement dans le bassin Adour-Garonne : impacts sur l'économie agricole

La réglementation française remet à plat les autorisations de prélèvements d'eau pour l'irrigation, dans un objectif de retour à l'équilibre ressources/besoins d'ici 2014 à 2021. Dans le sudouest, où une majorité du territoire est considérée comme déficitaire en eau mais où l'irrigation est très présente, cette réforme impliquera une baisse des volumes actuellement attribués. La présente étude a eu pour objectif d'évaluer l'impact de cette baisse sur l'économie agricole. Elle a été effectuée à l'échelle de six territoires en simulant les pertes en marge brute ou en excédent brut d'exploitation, avec ou sans mesures d'accompagnement. La combinaison de ces mesures permet, dans la majorité des cas, de réduire très significativement voire d'annuler ces pertes. Parmi ces mesures, les plus efficaces sont la création d'ouvrages de stockage et l'allocation prioritaire de quotas d'eau aux cultures à forte valeur ajoutée (arboriculture, maraichage, semences). / Water withdrawal policy for irrigation is reformed by the French legislation for a return to a balance between resources and needs in 2014 to 2021. Irrigation is largely developed in south-western France, where most of the territory faced structural water deficits. This policy change will decrease the available water for irrigation. The aim of this study was to assess the impact of this reform on the farming economy. It has been conducted on six watershed where economic losses have been simulated, using or not support measures. For most of cases, the combination of these measures lead to a significant decrease or a cancel of the losses. Among these measures, the most effective are the investment in water storage, and the prior water reallocation for high added value crops (tree crops, vegetable growing, seeds crops)

Contribution of computational model for assessment of heart tissue local stress caused by suture in LVAD implantation

Study: Implantation of a Left Ventricular Assist Device (LVAD) may produce both excessive local tissue stress and resulting strain-induced tissue rupture that are potential iatrogenic factors influencing the success of the surgical attachment of the LVAD into the myocardium. By using a computational simulation compared to mechanical tests, we sought to investigate the characteristics of stress-induced suture material on porcine myocardium. Methods: Tensile strength experiments (n = 8) were performed on bulk left myocardium to establish a hyperelastic reduced polynomial constitutive law. Simultaneously, suture strength tests on left myocardium (n = 6) were performed with a standard tensile test setup. Experiments were made on bulk ventricular wall with a single U-suture (polypropylene 3–0) and a PTFE pledget. Then, a Finite Element simulation of a LVAD suture case was performed. Strength versus displacement behavior was compared between mechanical and numerical experiments. Local stress fields in the model were thus analyzed. Results: A strong correlation between the experimental and the numerical responses was observed, validating the relevance of the numerical model. A secure damage limit of 100 kPa on heart tissue was defined from mechanical suture testing and used to describe numerical results. The impact of suture on heart tissue could be accurately determined through new parameters of numerical data (stress diffusion, triaxiality stress). Finally, an ideal spacing between sutures of 2 mm was proposed. Conclusion: Our computational model showed a reliable ability to provide and predict various local tissue stresses created by suture penetration into the myocardium. In addition, this model contributed to providing valuable information useful to design less traumatic sutures for LVAD implantation. Therefore, our computational model is a promising tool to predict and optimize LVAD myocardial suture

Asymptomatic papillary fibroelastoma of the Aortic valve in a young woman - a case report

Echocardiography represents an invaluable diagnostic tool for the detection of intracardiac masses while simultaneously provides information about their size, location, mobility and attachment site as well as the presence and extent of any consequent hemodynamic derangement