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Le portail « Savoirs en partage » favorise la diffusion de documents scientifiques mis en ligne par les établissements membres de l'Agence Universitaire de la Francophonie en collaboration avec les Campus numériques francophones, Direction régionales, etc. : un ensemble d'ouvrages, revues, articles, cours en ligne, etc sont ainsi simplement accessibles. Un moteur de recherche permet de les interroger simultanément
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246951 ressources correspondant à votre recherche (Fil RSS)
Auteur: Cortés Larravide, Enrique
Résumé: Este artículo propone discutir, a partir de evidencias principalmente documentales y en menor medida arqueológicas, si existió un término específico para enunciar a los habitantes del valle de Copiapó, en el Norte Chico chileno. Para ello, retomamos fuentes chilenas, peruanas y bolivianas provenientes de los siglos XVI y XVII, para ...
Auteur: Cortés Larravide, Enrique
Résumé: Un certain nombre de témoignages coloniaux font référence à une figure féminine ayant eu un grand pouvoir politique parmi les groupes locaux lors du contact hispano-indigène au milieu du XVIe siècle dans la vallée de Copiapo, au sud du désert d’Atacama. Cette figure, dénommée Lainacacha par les chroniqueurs espagnols, a ...
Auteur: Moulla, R., Lefevre, Laurent, Maschke, B.
Résumé: A reduction method is presented for systems of conservation laws with boundary energy flow. It is stated as a generalized pseudo-spectral method which performs exact differentiation by using simultaneously several approximation spaces generated by polynomials bases and suitable choices of port-variables. The symplecticity of this spatial reduction method is proved ...
Auteur: Moulla, Redha, Lefevre, Laurent, Maschke, Bernhard
Résumé: A reduction method which preserves geometric structure and energetic properties of non linear distributed parameter systems is presented. It is stated as a general pseudo-spectral method using approximation spaces generated by polynomials bases. It applies to Hamil-tonian formulations of distributed parameter systems which may be derived for hyperbolic systems (wave ...
Auteur: Daouk, Elias, Steene, Laurent,, Paviet, Frederic, Salvador, Sylvain
Résumé: In this study, the oxidative pyrolysis of large pine wood particles was analysed using a Macro-ThermoGravimetric apparatus (Macro-TGA). The effects of the concentration of oxygen in the surrounding gas and of particle size were investigated. Three different oxygen concentrations (0 %, 10 % and 20 %) and three sizes of ...
Auteur: Ducoffe, Guillaume, Marinescu-Ghemeci, Ruxandra, POPA, ALEXANDRU
Résumé: A coloring of a graph G is properly connected if every two vertices of G are the ends of a properly colored path. We study the complexity of computing the proper connection number (minimum number of colors in a properly connected coloring) for edge and vertex colorings, in undirected and ...
Auteur: Marcou, O., Chopard, B., El Yacoubi, S, Hamroun, Boussad, Lefevre, Laurent, Mendes, Eduardo
Résumé: Numerical simulations of free surface flows are important to provide a prediction tool for the optimal management of irrigation canals. Here we consider an alternative to solving the shallow water equations. We propose a free surface model in which the vertical component of the water current is fully resolved. We ...
Auteur: Le Corvec, Maëna, Jezequel, Caroline, Monbet, Valérie, Fatih, Nadia, Charpentier, Frédéric, Tariel, Hugues, Boussard-Plédel, Catherine, Bureau, Bruno, Loréal, Olivier, Sire, Olivier, Bardou-Jacquet, Edouard, Strnad, Pavel
Résumé: International audience
Auteur: Checcoli, Sara, Viada, Evelina
Résumé: The Torsion Anomalous Conjecture (TAC) states that a subvariety V of an abelian variety A has only finitely many maximal torsion anomalous subvarieties. In this work we prove, with an effective method, some cases of the TAC when the ambient variety A has CM, generalising our previous results in products ...
Auteur: Hamroun, Boussad, Dimofte, Alexandru, Lefevre, Laurent, Mendes, Eduardo
Résumé: — In this paper a control algorithm for the reduced port-Controlled Hamiltonian model (PCH) of the shallow water equations (PDEs) is developed. This control is developed using the Interconnection and Damping Assignment Passivity Based Control (IDA-PBC) method on the reduced PCH model without the natural dissipation. It allows to assign ...
Auteur: Bendimerad, Anes, Cazabet, Rémy, Plantevit, Marc, Robardet, Céline
Résumé: Starting from a relational database that gathers information on people mobility – such as origin/destination places, date and time, means of transport – as well as demographic data, we adopt a graph-based representation that results from the aggregation of individual travels. In such a graph, the vertices are places or ...
Auteur: van Thang, Pham, Chopard, Bastien, Lefevre, Laurent, Ondo, Diemer Anda, Mendes, Eduardo
Résumé: The D1Q3 lattice Boltzmann (LB) shallow water equation is analyzed in detail and compared with other numerical schemes. Analytical results are derived and used to discuss the accuracy and stability of the model. We show how such D1Q3 LB models for canal reaches may be easily coupled with various hydraulic ...
Auteur: Ivagnes, Alexandre
Résumé: Depuis ces 10 dernières années, l’immunothérapie est à l’avant-garde de la thérapie anticancéreuse. Les cellules Natural Killer (NK) font partie du système immunitaire inné et possèdent la capacité unique de lyser les cellules tumorales sans activation préalable par un antigène spécifique. Elles jouent un rôle majeur dans le contrôle de ...
Auteur: Evain, Andéoí, Argelaguet, Ferran, Roussel, Nicolas, Casiez, Géry, Lécuyer, Anatole
Résumé: BCIs are presumably supposed to require the full attention of their users and to lose accuracy if they pay attention to another task. This assertion has been verified with several BCI paradigms (e.g. P300). But the cognitive demand of the promising SSVEP paradigm had never been specifically assessed yet. We ...
Auteur: Olivier, Chloe, Houssaye, Alexandra, Jalil, Nour-Eddine, Cubo, Jorge
Résumé: The independent acquisition of endothermy in synapsids and diapsids are major events in vertebrate evolution since they were the driving force of a suite of correlated changes in anatomical, physiological, behavioural and ecological traits. While avian endothermy is assumed to have occurred at the archosauriform node, the acquisition of mammalian ...