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  • Publication . Part of book or chapter of book . Conference object . 2016
    Open Access French
    Authors: 
    Nieddu, Luisa;
    Publisher: HAL CCSD
    Countries: France, Switzerland

    La réflexion ici développée est tournée vers une analyse approfondie du profil artistique de Perréal par laquelle on cherchera à délimiter l'environnement historique dans lequel son expérience culturelle s'enracine et à montrer ainsi l'importance de sa production dans le portrait privé. Avec certitude, on sait qu'il se rend à Milan en 1499, pour l'entrée solennelle de Louis XII; visite historique durant laquelle il entre en contact avec Léonard désireux d'apprendre la technique de la couleur « a secco ». Les motivations exprimées dans l'art de ce dernier sont plutôt à rechercher dans la combinaison d'influences diverses dont il prit l'essence dans un exercice de réélaboration de modèles nordiques vers une direction lombarde où l'artiste démontra sa capacité à dominer la double origine de son style. Des rapports entre l'artiste lyonnais et les Flandres, il en est fait mention même dans l'historiographie du XIXe siècle, où l'hypothèse d'un séjour à Bruges de Perréal pour se perfectionner dans la peinture à l'huile a été émise.

  • Open Access French
    Authors: 
    Dolz-Mestre, Joaquim; Laurens, Véronique; Silva-Hardmeyer, Carla;
    Publisher: HAL CCSD
    Countries: Switzerland, France

    International audience

  • Publication . Part of book or chapter of book . Conference object . 2017
    Open Access
    Authors: 
    Michał Maciejewski; Joschka Bischoff; Sebastian Hörl; Kai Nagel;
    Publisher: Springer International Publishing
    Countries: Germany, France

    International audience; Since modern transport services are becoming more flexible, demand-responsive, and energy/cost efficient, there is a growing demand for large-scale microscopic simulation platforms in order to test sophisticated routing algorithms. Such platforms have to simulate in detail, not only the dynamically changing demand and supply of the relevant service, but also traffic flow and other relevant transport services. This paper presents the DVRP extension to the open-source MATSim simulator. The extension is designed to be highly general and customizable to simulate a wide range of dynamic rich vehicle routing problems. The extension allows plugging in of various algorithms that are responsible for continuous re-optimisation of routes in response to changes in the system. The DVRP extension has been used in many research and commercial projects dealing with simulation of electric and autonomous taxis, demand-responsive transport, personal rapid transport, free-floating car sharing and parking search.

  • Publication . Conference object . Part of book or chapter of book . 2002
    Open Access English
    Authors: 
    Giovanni Santin; D Strul; D. Lazaro; Luc Simon; M. Krieguer; M. Vieira Martins; Vincent Breton; C. Morel;
    Publisher: HAL CCSD
    Country: France
    Project: SNSF | Design and construction o... (63870)

    GATE, the Geant4 Application for Tomographic Emission, is a simulation platform developed for PET and SPECT. It combines a powerful simulation core (the Geant4 toolkit) and a large range of developments dedicated to nuclear medicine. In particular, it models the passing of time during real acquisitions, allowing to handle dynamic systems such as decaying source distributions or moving detectors. We present several series of results that illustrate the possibilities of this new platform. The simulation of decaying sources is illustrated on a dual-isotope acquisition with multiple time-frames. Count rate curves taking into account random coincidences and dead-time are shown for a dual-crystal set-up and for a small-animal PET scanner configuration. Simulated resolution curves and reconstructed images are shown for rotating PET scanners. Lastly, we present comparisons of simulated point-spread functions and spectra with experimental results obtained from a small-animal gamma camera prototype.

  • Publication . Part of book or chapter of book . Conference object . 2013
    Open Access
    Authors: 
    Fabio Daolio; Sébastien Verel; Gabriela Ochoa; Marco Tomassini;
    Country: France

    International audience; This article extracts and analyzes local optima networks for the permutation flow-shop problem. Two widely used move operators for permutation representations, namely, swap and insertion, are incorporated into the network landscape model. The performance of a heuristic search algorithm on this problem is also analyzed. In particular, we study the correlation between local optima network features and the performance of an iterated local search heuristic. Our analysis reveals that network features can explain and predict problem difficulty. The evidence confirms the superiority of the insertion operator for this problem.

  • Publication . Conference object . Preprint . Part of book or chapter of book . 1988
    Open Access French
    Authors: 
    Pascal Dumontier; Bernard Raffournier;
    Publisher: HAL CCSD
    Countries: France, Switzerland

    Deux conceptions du rôle de la comptabilité générale existent actuellement: la conception contractuelle, selon laquelle l'information comptable sert principalement au contrôle des contrats externes et internes à l'entreprise; et la conception prédictive aux investisseurs de formuler leur anticipations sur l'avenir de la firme. Après avoir étudié les exigences de ces deux approches, une analyse du système comptable français est effectuée, qui montre que celui-ci conserve une orientation essentiellement contractuelle, même si l'application du Plan Comptable de 1982 marque une évolution vers une meilleure prise en compte des besoins des investisseurs.

  • Publication . Part of book or chapter of book . Article . Other literature type . Conference object . 2015
    Open Access
    Authors: 
    Matthew Cook; Urban Larsson; Turlough Neary;
    Publisher: Springer Berlin Heidelberg
    Countries: France, Switzerland
    Project: SNSF | Undecidability and effici... (153295), SNSF | Time/Space Efficiency of ... (141029)

    We show that the winning positions of a certain type of two-player game form interesting patterns which often defy analysis, yet can be computed by a cellular automaton. The game, known as {\em Blocking Wythoff Nim}, consists of moving a queen as in chess, but always towards (0,0), and it may not be moved to any of $k-1$ temporarily "blocked" positions specified on the previous turn by the other player. The game ends when a player wins by blocking all possible moves of the other player. The value of $k$ is a parameter that defines the game, and the pattern of winning positions can be very sensitive to $k$. As $k$ becomes large, parts of the pattern of winning positions converge to recurring chaotic patterns that are independent of $k$. The patterns for large $k$ display an unprecedented amount of self-organization at many scales, and here we attempt to describe the self-organized structure that appears. 14 pages, 12 figures, 21st IFIP WG 1.5 International Workshop, AUTOMATA 2015, Turku, Finland, June 8-10, 2015

  • Publication . Part of book or chapter of book . Other literature type . Conference object . 2018
    Open Access English
    Authors: 
    Boonserm Kulvatunyou; Evan K. Wallace; Dimitris Kiritsis; Barry Smith; Chris Will;
    Publisher: HAL CCSD
    Country: Switzerland

    Part 6: Industry 4.0 - Smart Factory; International audience; The current industrial revolution is said to be driven by the digitization that exploits connected information across all aspects of manufacturing. Standards have been recognized as an important enabler. Ontology-based information standard may provide benefits not offered by current information standards. Although there have been ontologies developed in the industrial manufacturing domain, they have been fragmented and inconsistent, and little has received a standard status. With successes in developing coherent ontologies in the biological, biomedical, and financial domains, an effort called Industrial Ontologies Foundry (IOF) has been formed to pursue the same goal for the industrial manufacturing domain. However, developing a coherent ontology covering the entire industrial manufacturing domain has been known to be a mountainous challenge because of the multidisciplinary nature of manufacturing. To manage the scope and expectations, the IOF community kicked-off its effort with a proof-of-concept (POC) project. This paper describes the developments within the project. It also provides a brief update on the IOF organizational set up.

  • Publication . Other literature type . Part of book or chapter of book . 2006
    Closed Access English
    Authors: 
    Dillenbourg, P.; Bétrancourt, M.;
    Publisher: HAL CCSD
    Country: Switzerland

    Does collaboration increase or decrease cognitive load during learning? On one hand, collaboration enables some degree of division of labour that may reduce cognitive load. On the other hand since interacting, expressing thoughts, monitoring another's understanding, grounding, etc., are mechanisms inducing some extraneous cognitive load, they may create cognitive overload and impede learning mechanisms. However this additional load may explain why collaboration sometimes leads to knowledge construction. This trade-off between productive versus counter-productive load is not specific to collaborative learning. It is also present in individual learning, namely questioning guided-discovery learning methods. This contribution explores the concept of cognitive load in collaborative situations. We raise more question than provide answers. What constitutes collaboration load, i.e. which mechanisms triggered during collaborative learning more often than during individual learning, contribute to increase cognitive load? In collaborative learning software, which interface features and tool functionalities increase or decrease the different costs factors (verbalization, grounding, modelling...)? We explore these questions and illustrate our arguments with three studies on computer-supported collaborative problem solving. We also consider how the collaboration load may be tuned through the design of computer-supported collaborative learning environments.

  • Publication . Other literature type . Part of book or chapter of book . 2017
    Open Access French
    Authors: 
    Rigal, Alexandre; Rodighiero, Dario;
    Publisher: HAL CCSD
    Country: Switzerland

    Dans le cadre de la « Conférence internationale des Humanités Numériques » qui s’est tenue en 2014 à Lausanne, nous avons réalisé une représentation. Celle-ci est une cartographie en réseau des auteurs et des mots-clés de la conférence. Les cartes résultantes sont reproduites sur divers objets : bâche, tapis, ouvrages, posters, tasses. Ces derniers avaient pour fonction de susciter l'intérêt des auteurs et leur identi cation au champ des humanités numériques. La qualité de la car- tographie en réseau est qu'elle exclut peu d'acteurs et dans notre cas peu de participants. De ce fait un grand nombre de participants à la conférence a pu se trouver sur la représentation et par là prendre part au collectif suggéré par les liens de la cartographie. Par ces reproductions, qui ne sont jamais vraiment mécaniques, la représentation a circulé en alimentant des interprétations qui tracent les contours d'un collectif propre à la conférence. Les traces fabriquées par les participants - commentaires de la cartographie, photos, souvenirs, tweets, etc. -, permettent de suivre la trajectoire de la représentation. Par conséquent, savoir si la représentation a réussi revient à enquêter sur l’étendue et la qualité de sa trajectoire entre les épreuves. L’enjeu de cet article est donc d’enquêter sur le design cartographique en tant qu’art du rassemblement, grâce aux outils du design cartographique.

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