1,718 research outputs found
Le double visage de Vinet. M. Clavier, La pensée religieuse de Vinet, 1938
No full textBenoît Jean-Daniel. Le double visage de Vinet. M. Clavier, La pensée religieuse de Vinet, 1938. In: Revue d'histoire et de philosophie religieuses, 21e année n°2,1941. pp. 111-137
Outlines of philosophy and literature,
No full textEdited by M.Astié.- cf.Note by the publisher."Extracts from the various works of M. Vinet ... put together by the editor M. Astie": p. [v]Mode of access: Internet
Characterization and modelling of the PEKK thermomechanical and creep behavior above the glass transition temperature
No full textThe present work focuses on the characterization and the modelling of the PEKK 7002 thermomechanical behavior at temperatures between the glass transition temperature, Tg (≈160 °C), and 200 °C, as experienced in tensile, load-unload-reload and creep-recovery tests. A novel strain measurement image analysis based tool (IAT) is presented and compared with existing measurement setup, and employed for the validation of the strain measurement acquired during the thermomechanical tests. The crystallization kinetics between 165 °C and 200 °C is described and the coupling with thermomechanical solicitations is investigated. An analytical description of the identified mechanisms is proposed for the tensile, load – unload and creep-recovery solicitations and it constitutes a 1-D model of PEKK 7002, which is employed for understanding the experimental results
Characterization of the subventricular zone of the adult human brain: evidence for the involvement of Bcl-2
No full textThe subventricular zone (SVZ) is an embryonic remnant that persists and remains mitotically active throughout adulthood. The rodent SVZ harbors neuronal precursors, principally in its anterior part, and generates neuroblasts that migrate tangentially into the olfactory bulb, thus forming the so-called rostral migratory stream. This study aimed at characterizing the SVZ in the human brain. Antibodies raised against the widely used SVZ molecular markers nestin, glial fibrillary acidic protein, beta-tubulin-III and polysialylated neural cell adhesion molecule, have allowed us to characterize in detail a zone similar to the rodent SVZ in humans. Virtually all portions of the lateral ventricle, as well as the ventral (hypothalamic) sector of the third ventricle, displayed immunoreactivity for most of the molecular markers. The midline region of the septum (septal recess) and the ventral portion of the SVZ displayed a particularly intense immunostaining for all SVZ markers. These two regions may represent zones of adult neurogenesis that are unique to primates. Furthermore, the anti-apoptotic protein Bcl-2 was found to be actively synthesized and co-expressed with all the other markers throughout the entire SVZ. This study reveals that a well-developed SVZ exists in the adult human brain and suggests that Bcl-2 might play an important role in the functional organization of such a system
Assessment and simulation of the thermomechanical tensile and creep behavior of C/PEKK composites for aircraft applications above the glass transition temperature
No full textThe present work focuses on the assessment and the simulation of the thermomechanical tensile and creep behavior of Poly Ether Ketone Ketone 7002/carbon fibers composites behavior under tensile and creep solicitation between the glass transition temperature and 200 °C, via a multiscale approach starting from the behavior of the PEKK 7002 neat polymer. Tensile and creep polymer and composite experimental curves are employed to develop and validate generalized Semi – Analytical Homogenization / Localization Method for the simulation of the thermomechanical tensile and creep behavior of composite laminates. Through the employment of the model, a similarity of behavior between polymer and composites is demonstrated. The proposed algorithm capabilities of simulating the thermomechanical tensile and creep behavior of composites with different ply orientations and stacking sequences are then presented
L'aspect et la copule vide dans la grammaire des titres
No full textM.-T. Vinet
The aim of this paper is to discuss the structure of predicate constructions without a copula in French headlines. We show that the categorial selection for the syntactic realization of predication is here partly determined by the semantic properties of a lexical verbal element. We also demonstrate the role of a non-overt Aspectual head in licensing DP predicates which are obligatorily free adjuncts in this register of French. Finally, a brief comparison of predicate constructions in Moroccan Arabic serves to emphasize the universality of certain aspects of these constructions.Vinet Marie-Thérèse. L'aspect et la copule vide dans la grammaire des titres. In: Langue française, n°100, 1993. Temps et aspect dans la langue française, sous la direction de Jacqueline Guéron. pp. 83-101
Coupling between thermal ageing/degradation and creep behavior of PEKK and C/PEKK composites above the glass transition temperature
No full textThe present work aims at investigating the coupling between thermal ageing/degradation and creep behavior of PEKK and C/PEKK composites at 200 °C, above the glass transition temperature (which is close to 160 °C). Ageing tests were carried out at 200 °C, under 5 bar of oxygen conditioned atmosphere. DSC scans and DMA tests were carried out. Tests results discussion were supported by indentation tests and image analysis of the aged specimen cross-section. Coupled oxidation-thermomechanical-creep tests were carried out on C/PEKK samples at 200 °C under a 5 bar O2 environment. The resulting strain response was compared to creep tests carried out on C/PEKK samples at 200 °C under air at similar creep stress. Such comparison allowed to investigate the presence of degradation phenomena in C/PEKK samples. The analysis of X-rays μ-tomography scans allowed investigating the possible occurrence of degradation, and to discriminate between pure thermal and thermomechanical coupling with degradation phenomena
Switching quantum transport in a three donors silicon fin-field effect transistor
No full textWe switch the transport along different paths in a system constituted by a phosphorus donor in a silicon quantum dot in complementary metal-oxide-semiconductor technology, coupled with two donors at the source side. The standard Coulomb blockade pattern created by the transport through the D(0) neutral state of an individual donor located in the channel of the device is modified by two additional randomly diffused nearby donors. By varying the control voltages, the fin-field effect transistor acts as a quantum device which may be used to control alternative current paths through different donors
Microglia phenotype diversity
No full textMicroglia, the tissue macrophages of the brain, have under healthy conditions a resting phenotype that is characterized by a ramified morphology. With their fine processes microglia are continuously scanning their environment. Upon any homeostatic disturbance microglia rapidly change their phenotype and contribute to processes including inflammation, tissue remodeling, and neurogenesis. In this review, we will address functional phenotypes of microglia in diverse brain regions and phenotypes associated with neuroinflammation, neurogenesis, brain tumor homeostasis, and aging
Neuron-microglia signaling: chemokines as versatile messengers
No full textOur understanding of microglia biology has significantly changed in the last couple of years. Instead of being predominantly detrimental cells showing a stereotypic activation pattern, microglia today are considered highly adaptive elements with many distinct phenotypes. Microglia activity is aimed to protect and to restore and only in case of uncontrolled or impaired microglia function these cells may have detrimental effects. The control of microglia activity is thus an important issue to understand. The family of chemokines are versatile signals specialized to control cell-cell interactions. Neurons express chemokines in a temporarily and spatially regulated manner and microglia respond to these messengers via the appropriate receptors. Due to these features are chemokines ideal messengers for the communication between neurons and microglia
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