Academic literature on the topic 'Résistance in-situ'
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Journal articles on the topic "Résistance in-situ":
Djian-Caporalino, Caroline, Mireille Navarrete, Ariane Fazari, Marc Baily-Bechet, Nathalie Marteu, Arnaud Dufils, Marc Tchamitchian, et al. "Conception et évaluation de systèmes de culture maraîchers méditerranéens innovants pour gérer les nématodes à galles." BASE, no. 1 (2019): 7–21. http://dx.doi.org/10.25518/1780-4507.17725.
Fechant, Catherine, Jacques Bertrand, Pierre Mechler, and Blaise Souffache. "Mesure de la résistance mécanique de pierres de taille calcaires in situ." Revue d'Archéométrie 21, no. 1 (1997): 45–53. http://dx.doi.org/10.3406/arsci.1997.946.
Jassionnesse, Christophe. "Réflexions sur la stabilité en section courante des tunnels profonds." Revue Française de Géotechnique, no. 176 (2023): 4. http://dx.doi.org/10.1051/geotech/2024001.
Hosseini-Sadrabadi, Hamid, Sebastien Volcy, Bruno Chareyre, Christophe Dano, Luc Sibille, and Pierre Riegel. "Un pénétromètre à pointe contrôlé en force ou en déplacement pour une caractérisation étendue des sols." Revue Française de Géotechnique, no. 178 (2024): 1. http://dx.doi.org/10.1051/geotech/2024004.
Fosse-Gomez, Marie-Hélène, and Nil Özçağlar-Toulouse. "Augmenter le pouvoir d’achat par l’autoréduction." Décisions Marketing N° 56, no. 4 (December 1, 2009): 63–73. http://dx.doi.org/10.3917/dm.056.0063.
Casaux, Y., A. Dollet, F. Sibieude, and R. Berjoan. "Influence de l'orientation cristalline sur la résistance à l'oxydation de revêtements de AIN : étude in-situ par diffractométrie X." Le Journal de Physique IV 08, PR5 (October 1998): Pr5–249—Pr5–256. http://dx.doi.org/10.1051/jp4:1998531.
Berard, A., and T. Pelte. "Les herbicides inhibateurs du photosystème II, effets sur les communautés algales et leur dynamique." Revue des sciences de l'eau 12, no. 2 (April 12, 2005): 333–61. http://dx.doi.org/10.7202/705355ar.
Tubbs, E., P. Theurey, F. Zoulim, M. Ovize, H. Vidal, and J. Rieusset. "P1036 Détection in situ des interactions entre la mitochondrie et le réticulum endoplasmique par proximity ligation assay : rôle potentiel d’une altération de ces interactions dans l’insulino résistance hépatique." Diabetes & Metabolism 39 (March 2013): A94. http://dx.doi.org/10.1016/s1262-3636(13)72021-4.
NAVES, M., G. ALEXANDRE, F. LEIMBACHER, N. MANDONNET, and A. MENENDEZ-BUXADERA. "Les ruminants domestiques de la Caraïbe : le point sur les ressources génétiques et leur exploitation." INRAE Productions Animales 14, no. 3 (June 16, 2001): 181–92. http://dx.doi.org/10.20870/productions-animales.2001.14.3.3738.
Bienvenue, Louise, and Andréanne Lebrun. "Le « boulot » à Boscoville. Une expérience pédagogique auprès de la jeunesse délinquante au Québec (1949-1980)." Revue d’histoire de l’enfance « irrégulière » N° 16, no. 1 (January 1, 2014): 111–35. http://dx.doi.org/10.3917/rhei.016.0111.
Dissertations / Theses on the topic "Résistance in-situ":
Sniezewski, Julien. "Etude in situ sous gradient thermique de l’écaillage d’alliages alumino-formeurs et de barrières thermiques aéronautiques." Phd thesis, Toulouse, INPT, 2008. http://oatao.univ-toulouse.fr/7229/1/sniezewski.pdf.
Zhao, Fei. "Study on mechanical properties of the in situ TiB/TiC reinforced titanium matrix composites." Troyes, 2010. http://www.theses.fr/2010TROY0030.
The aim of this research is to study the effects of reinforcements TiB and TiC materials by experimental analyzing structures and mechanical testing of properties of in situ synthesize TiB/TiC reinforced titanium matrix composites. The tensile, friction and fatigue properties of in situ TiB/TiC reinforced composites structures were tested. Finite element analysis was also used to simulate the effect of the reinforcements. The results show that the reinforcements can play an important role in the composites properties. The elastic modulus and shear modulus have some relation with the type, the quantity, the shape and the distribution of the reinforcements in the composite materials. Some formulas about the modulus of the composites are suggested by modelling the composite behaviours with numerical method. The reinforcements can prevent the crack initiation and propagation in static load. For the fatigue properties, the reinforcement TiB reduces the fatigue life of the composites under high level of load, but increases it in low load conditions, while TiC reinforcements can improve the fatigue strength of the composites. So in practice, the applying conditions of the composites should be considered. The contents of the reinforcements should be determined by taking account of the manufacturing costs, so that we can to optimize the practical needs and to but reduce the costs
Chelta, Antoine. "Projet d'instrumentation "in situ" monopuits pour la reconnaissance de caractéristiques sismiques de sols." Montpellier 2, 1990. http://www.theses.fr/1990MON20207.
Sasaki, Layla. "Influence du vieillissement sur la résistance à la fissuration par fatigue à haute température d'alliages de titane pour mâts-réacteurs." Thesis, Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique, 2018. http://www.theses.fr/2018ESMA0006/document.
The conception of more efficient aircraft engines induces increased stress and temperature levels on the titanium alloys constitutive of the engine pylon. On the one hand, these materials have to be qualified in terms of damage tolerance. On the other hand, the long term high temperature exposure of these titanium alloys gives also rise to the question of thermal aging and metallurgical stability. Hence, the dimensioning as well as the maintenance of such aerostructures need to be considered in the light of both these critical issues.In the present work, the cyclic behavior as well as the fatigue crack resistance of different titanium alloys (TA6V, Ti 6242 et Ti 17), with various microstructures were studied after different aging conditions. Aging induces mainly an increase in crack growth rates at high values of the stress intensity factor, at room temperature. Subsequently, a thorough characterization procedure of this phenomenon was undertaken,including various types of loadings, at different scales and associated with fractographic analyses. The results allowed to suggest a damage scenario before and after aging, in the case of the alloy most affected by aging: theTi 17 alloy. This scenario shows the occurrence of a « static » mode of failure, which is linked to a damage process associated with intralamellar fracture and decohesion, without noticeable changes in the cyclic behavior. Finally, a time-temperature equivalency approach was developed to describe the kinetics of degradation of the mechanical properties induced by aging
Laflamme, Christian. "Agents du bioterrorisme : détection in situ de gènes de résistance aux antibiotiques chez les spores de Bacillus sp." Thesis, Université Laval, 2008. http://www.theses.ulaval.ca/2008/25821/25821.pdf.
Cristofari, François. "Etude du comportement et de la résistance mécanique d'un pancréas bioartificiel pour l'homme. Caractérisation expérimentale et simulation numérique." Thesis, Paris, ENSAM, 2017. http://www.theses.fr/2017ENAM0055.
In order to treat type 1 diabetics, a bioartificial pancreas has been developed. It consists in the encapsulation of insulin producing cells: it is made of porous membranes which isolate cells from patient antibodies, allowing the glucose and the insulin to pass through. Before its commercialization, it is necessary to verify that its mechanical behavior allows it to be implanted in a human body without any risk for the patient. The mechanical strength of the membranes under loading is therefore studied. Their structure is first obtained using scanning electron microscopy and X-ray nanotomography. Tensile tests are then done at both macroscopic and microscopic scales, digital image correlation techniques being used to characterize the membranes at each scale. At the same time, a numerical model using finite element method is built based on the microstructural and mechanical characteristics of the membranes experimentally identified. A methodology to compare the experimental and numerical results behavior of the membranes is proposed and used. The results of the study are finally considered to assess the possibility to use the device in clinic phase
Devillard, Julie. "Lien entre microstructure et résistance à la compression du gypse moussé." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI043.
This study focuses on the microstructural and mechanical characterization of foamed gypsum, the core material of lightweight gypsum boards, with a high (75%) multi-scale porosity. The objective of this work is to determine the influence of the microstructure of foamed gypsum on the hardness measured in spherical indentation and to analyze the damage mechanisms for different microstructures. Spherical indentation tests were conducted on samples showing variations in microstructural features of foamed gypsum. The results of these tests show that density has a first-order influence on hardness and that the dispersion of hardness measurements in spherical indentation can be related to heterogeneity in macroporosity. In situ indentation tests were also carried out, with X-ray tomography and digital volume correlation (DVC) analysis, in order to accurately study the damage mechanisms. Two different modes of damage were determined according to the densities considered (variable macropore fraction). The results of these tests were used to feed an analytical model, based on an energy criterion that links the indentation force to the damaged area under the indenter. This provides the prediction of the indentation force-displacement curve specific to a microstructure with a scan of the initial microstructure as the only input data. Numerical modelling was also carried out using the finite element method with consideration of the actual microstructure, at two scales. The densified areas were properly predicted by different behaviour models based on plasticity criteria
Findik, Busra. "Formulations innovantes pour la résistance au feu de systèmes actifs par addition physique et génération in situ de charges minérales." Electronic Thesis or Diss., Lyon 1, 2022. http://www.theses.fr/2022LYO10117.
One of Nexans' major challenges is to develop fire-resistant cables for buildings, industry and infrastructure networks. In this context, one of the systems developed is a three-layer insulated electric cable. The main disadvantage of the composite material used in the composition of this electrical cable is its high filler content, necessary to obtain a material that meets the expected electrical and thermal performance. This high filler rate can constitute an obstacle to the fabrication process of the material due to the high viscosity induced, but also deteriorate its final properties such as flexibility and hardness. The alternative strategy developed aiming to reduce the filler rate and thus reduce the viscosity of the materials to facilitate their implementation was to synthesize the fillers directly in the molten polymer. The sol-gel process by which an inorganic phase can be generated in situ during the extrusion process through the use of inorganic precursors is particularly suitable. Indeed, the inorganic precursors can play the role of solvent or plasticizer prior to their reaction, thus making it possible to lower the viscosity of the complete system. From these observations stems the main objective of the work of this thesis, which is to develop fire-resistant materials by integrating charges generated in situ by reactive extrusion in a pre-charged polymer matrix
Le, boulch Pauline. "Déterminants moléculaires de la résistance au puceron vert (Myzus persicae) chez le pêcher (Prunus persica) : étude multi-omique des réponses à l'infestation." Electronic Thesis or Diss., Avignon, 2022. http://www.theses.fr/2022AVIG0371.
Of the many pests that plants face, aphids are certainly the most damaging to crops due to their rapid multiplication, the direct damage they cause and the plant pathogenic viruses they transmit. The green peach aphid (Myzus persicae, Sulzer) is a generalist pest that attacks a wide range of plants including peach, its primary host, but also numerous secondary hosts from various botanical families including different cultivated species. Previous work has highlighted peach accessions with resistance to M. persicae conferred by the Rm locus that was characterised by an antixenosis phenomenon that rapidly causing the aphids to leave. The objective of our study was to identify, using an integrated transcriptomics and metabolomics approach, the factors involved in the expression of resistance to M. persicae in peach trees in order to obtain a quasi-exhaustive description of the biological functions activated or repressed by the infestation. We compared the responses to infestation of two peach genotypes, GF305 susceptible to M. persicae and Rubira carrying the Rm2 resistance gene, 48 h post-infestation, a period corresponding to the effective establishment of Rm2-induced resistance.Comparative transcriptomic and metabolomic analysis of the two peach varieties revealed a very limited response of GF305 to infestation while profound reconfigurations in Rubira were observed. The transcriptional reconfiguration resulted in a repression of genes involved in growth and development functions and an overexpression of defence genes, indicating a reorientation of cell function towards defence. This observation was confirmed by the significant reduction in metabolic pools of carbon, nitrogen and sulphur and by the accumulation of caffeic acid conjugates with anti-appetent or toxic properties towards aphids. Among the defence genes, the overexpression of PRR and NLR receptors suggested a joint activation of both branches of the plant immune system, PTI and ETI. Furthermore, the enrichment of oxidative stress-related genes, coupled with the activation of H2O2-generating metabolic pathways such as photorespiratory glyoxylate synthesis and P5C/proline futile cycle activation, underlineed the probable involvement of ROS synthesis in Rubira resistance to M. persicae. The appearance of necrotic lesions indicative of a hypersensitive reaction could also be attributed to an oxidative burst in response to infestation. The triggering of an acquired systemic response was also suggested by the activation of salicylic and pipecolic acid metabolism. Finally, as the involvement of pipecolic acid in plant resistance to aphids is poorly documented and in order to determine the role of this compound in peach resistance, the effect of an exogenous supply of pipecolic acid on the escape behaviour of M. persicae and on the development of aphid colonies, as well as on the metabolic profile of the apices was investigated. Although this experiment did not show the capacity of pipecolic acid to induce resistance, it provided new informations concerning the metabolic markers inducible by this molecule. To conclude, this work illustrates the extent and complexity of the expression of resistance to M. persicae conferred by Rm2 and underlines the interest of integrating transcriptomic and metabolomic data for the analysis of the plant/aphid interaction. This functional knowledge will be crucial in order to exploit natural sources of resistance and sustainably control aphid populations
Kay, Élisabeth. "Transfert latéral d'ADN chez les bactéries : étude de paramètres biotiques et abiotiques affectant la fréquence des transferts in situ." Lyon 1, 2002. http://www.theses.fr/2002LYO10245.