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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Blin, Joël; Dabat, Marie-Hélène; Faugère, Garance;

    Ce document a vocation à présenter quelques éléments d 'état des lieux de la situation au Burkina Faso plutôt qu'une analyse, en vue de faciliter les échanges et les comparaisons entre pays autour des enjeux et perspectives des biocarburants pour l'Afrique lors de la conférence. Les thèmes abordés concernent le contexte général de l'agriculture, le contexte environnemental, le contexte énergétique et le contexte des biocarburants. Les données sont quelquefois partielles mais seront complétées après la conférence. Les principales sources statistiques et références bibliographiques utilisées sont listées en fin de document. (Résumé d'auteur)

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Agritroparrow_drop_down
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Agritrop
    Conference object . 2007
    Data sources: Agritrop
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Agritrop
    Conference object . 2007
    Data sources: Agritrop
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Agritroparrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      Agritrop
      Conference object . 2007
      Data sources: Agritrop
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      Agritrop
      Conference object . 2007
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Buffo, Marc; Andrea, Jonathan; Dumoulin, Normand; Guillard, Etienne; +2 Authors

    Cet article présente une méthode qui permet de simuler le courant et la tension d'un arc électrique initié durant l'ouverture d'un contacteur. Basée sur un modèle simplifié de l'arc électrique et de la dynamique des contacts à l'ouverture, cette méthode permet de simuler l'apparition et l'extinction d'un arc, considéré comme une résistance non linéaire. Les paramètres liés à la mécanique et à l'arc sont approximés par des tests expérimentaux sur un contacteur. Les résultats de la simulation sont comparés aux données expérimentales afin de démontrer la validité de la méthode proposée.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Hyper Article en Lig...arrow_drop_down
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Hal
    Article . 2017
    Data sources: Hal
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Hal
    Conference object . 2017
    Data sources: Hal
    https://dx.doi.org/10.18145/ji...
    Other literature type . 2017
    License: CC 0
    Data sources: Datacite
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Hyper Article en Lig...arrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      Hal
      Article . 2017
      Data sources: Hal
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      Hal
      Conference object . 2017
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      https://dx.doi.org/10.18145/ji...
      Other literature type . 2017
      License: CC 0
      Data sources: Datacite
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Caliman, Jean-Pierre; De Kochko, P.;

    La topographie est un des facteurs écologiques importants à étudier avant la mise en place d'une plantation de palmiers à huile [1]. L'accord est unanime pour considérer qu'au-delà d'une certaine pente (variant de 3 à 5 p. 100 suivant les auteurs) les difficultés rencontrées pour la mise en place et l'exploitation de la palmeraie croissent rapidement. De plus, dans ces conditions, l'utilisation du milieu n'est pas optimale : - dégradation des sols par déstructuration de l'horizon supérieur (battance) et amplification des phénomènes d'érosion ; - diminution du coefficient d'utilisation des eaux de pluies due aux pertes par ruissellement. Il est cependant difficile, dans la plupart des cas de se limiter aux terrains où la topographie est idéale, Si bien que certaines mesures doivent être prises pour s'intégrer aux conditions du milieu afin d'en effectuer une exploitation optimale et sauvegarder le potentiel des sols. L'objet des présents " Conseils " est de décrire quelques techniques culturales et travaux spéciaux d'aménagement, comme: - l'abattage et l'andainage orientés en fonction de la topographie ; la construction de diguettes en courbes de niveau ; - les plantations sur terrasses individuelles. (Résumé d'auteur)

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Agritroparrow_drop_down
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Agritrop
    Article . 1987
    Data sources: Agritrop
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Agritroparrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      Agritrop
      Article . 1987
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Bastianelli, Denis; Omaria, R.E.; Bonnal, Laurent; Grimaud, Patrice;

    Une étude sur la qualité des matières premières destinées à l'alimentation des volailles a été réalisée en Ouganda et au Kenya. Plus de 600 échantillons ont été collectés et analysés pour déterminer leur composition chimique et estimer leur valeur nutritionnelle. Pour le maïs, la qualité est proche des tables de composition internationales, et la variabilité est modérée. Pour d'autres matières premières comme le son de maïs ou les farines de poisson, la qualité est très variable et éloignée des standards internationaux. En formulation des aliments, la prise en compte de la qualité réelle des matières premières est nécessaire. Cette évaluation est facile lorsqu'un échantillon peut être affecté à une catégorie bien définie et homogène d'une table, en se basant sur son origine ou son aspect. Dans le cas contraire, une analyse doit être pratiquée. Dans le cas des farines de poisson la seule connaissance de la teneur en matières minérales (MM), facile à déterminer, permet l'affectation dans 3 classes de qualité. Pour le son de blé une analyse plus poussée (amidon, fibres) serait nécessaire. Une alternative à l'analyse chimique est l'utilisation de la spectrométrie dans le proche infrarouge (SPIR) qui permet d'estimer rapidement la composition d'un échantillon, ou éventuellement de le classer dans un groupe adapté. (Résumé d'auteur)

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Agritroparrow_drop_down
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Agritrop
    Conference object . 2008
    Data sources: Agritrop
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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    Conference object . 2008
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Agritroparrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      Agritrop
      Conference object . 2008
      Data sources: Agritrop
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      Agritrop
      Conference object . 2008
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Penot, Eric; Courbet, Philippe; Chambon, Bénédicte; Ilahang, I.; +1 Authors

    Les "jungle rubber" sont le système agroforestier complexe le plus largement disséminé en Indonésie combinant production et environnement durable. L'amélioration de leur productivité devient nécessaire depuis les années 80. L'alternative proposée par les projets a été, depuis 1970, basée sur la monoculture avec un coût en intrant et travail élevé. L'hévéa reste une "valeur refuge". Avec une capacité financière limitée, les producteurs souhaitent investir dans des systèmes hévéicoles à coûts intermédiaires. Le Smallholder Rubber Agroforestry Project a proposé en approche négociée des systèmes de culture agroforestiers à base d'hévéas clonaux : les Rubber Agroforestry Systems (RAS). Les pratiques agroforestières diminuent le travail et les intrants en période immature. Les freins à l'adoption des innovations restent l'investissement en travail par rapport à des stratégies généralement extensives, le manque et la faible qualité du matériel végétal amélioré et le manque d'information technique. Les possibilités de développement des RAS sont plus actuelles que jamais dans un environnement économique difficile. (Résumé d'auteur)

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Agritroparrow_drop_down
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    Agritrop
    Article . 1999
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Agritroparrow_drop_down
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      Article . 1999
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  • Authors: Georges Dossou; Jadix Saïnou; Lucien Agbandji; Précieux Christian Behanzin;

    L’objet de ce travail est d’analyser les déterminants de la demande résidentielle d’énergie électrique au Bénin. L’étude a été réalisée sur 1089 ménages en utilisant les données de l’Enquête sur la Consommation d’Electricité au Bénin (ECEB) conduite en 2014 par l’Institut National de la Statistique et de l’Analyse Economique. Après avoir procédé à une analyse descriptive univariée et bivariée, une modélisation économétrique en données de panel a été mise en œuvre. Le modèle d’analyse de la demande conditionnelle de Dalen et Larsen (2012) utilisé à cet effet a révélé que le sexe du chef de ménage, la taille et le revenu du ménage ainsi que la possession d’appareils électroménagers tels que le ventilateur, le brasseur, le réfrigérateur et la radio influencent la demande résidentielle globale d’énergie électrique des départements contrairement au milieu de résidence (urbain ou rural) et au prix du kilowattheure d’électricité. Repères et Perspectives Economiques, Vol. 4, No 2 (2020)

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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Schwab, Didier; Riou, Sébastien; Fejza, Amela; Vial, Loïc; +5 Authors

    Afin de développer et d'améliorer une communication Augmentée et alternative (CAA), le regard est souvent considéré comme l'un des moyens les plus naturels et les plus faciles à mettre en place pour permettre aux personnes en situation de polyhandicap d'interagir avec leur environnement. Bien entendu, pour des enfants qui partent par nature de zéro, qui de plus ont de telles difficultés, c'est déjà un grand défi d'acquérir et de soutenir les connaissances de base que cette communication requiert. Les jeux sont souvent considérés comme un bon moyen d'apprendre. Les jeux destinés à être utilisés avec des oculomètres (eye-trackers), c'est-à-dire des dispositifs électroniques capables d'estimer la position du regard, peuvent être un bon moyen d'améliorer les compétences requises comme la fixation et la poursuite oculaire, ainsi que des conventions comme les récompenses ou les interactions de fixation (dwell interaction) souvent utilisées dans les outils de CAA. Dans cet article, nous présentons le projet GazePlay dont la principale contribution est un logiciel libre et gratuit qui rassemble plusieurs mini-jeux compatibles avec tous les oculomètres, y compris les moins chers. In order to develop and enhance an augmentative and alternative communication (AAC), gaze is often considered as one of the most natural way and one of the easiest to set up in order to support individuals with multiple disabilities to interact with their environment. For children who start naturally from scratch, who have in addition such difficulties, it is a strong challenge even to acquire or to support the required basic knowledge. Games are often considered a good way to learn. Games designed for eye-trackers, i.e. electronic devices able to compute the position of the gaze, allow children to discover the power of their eyes and the consequences of the actions triggered by their gazes. Video games can be a good way to improve basic requirements as gaze fixation and gaze pursuit as well as conventions like rewards or dwell interactions often used in AAC tools. In this article, we present the GazePlay project which main contribution is a free and open-source software which gathers several mini-games playable with all eye-trackers including low cost ones.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Hyper Article en Lig...arrow_drop_down
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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    Article . 2020 . Peer-reviewed
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    Part of book or chapter of book . 2020
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    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Hyper Article en Lig...arrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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      Part of book or chapter of book . 2020
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Gouyon, Anne; Penot, Eric;

    Pendant près de 75 ans on a assisté avec l'hévéaculture à l'extension d'un système agroforestier à faible productivité, sans changement technique significatif. Depuis le début des années 1980, un nombre croissant de petits planteurs cherchent à modifier leurs systèmes de culture pour utiliser les variétés sélectionnées à haut potentiel de rendement, multipliées par greffages (clones) et proposées par les projets de développement. Les paysans ne sont pas tous en mesure de mobiliser les financements nécessaires, de maîtriser les nouvelles techniques et de supporter les risques liés à ces changements. Un programme d'expérimentations est en cours afin de mettre au point des techniques nouvelles qui, en utilisant les méthodes de l'agroforesterie, pourraient permettre au plus grand nombre de planteurs d'augmenter leur revenu, tout en préservant au moins partiellement le milieu forestier des régions concernées

    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Agritroparrow_drop_down
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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    Conference object . 1997
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    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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    Conference object . 1997
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      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Agritroparrow_drop_down
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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      Conference object . 1997
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      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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      Conference object . 1997
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  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Cabot, Chantal;

    Après l'exposé général traitant de certains aspects de l'amélioration génétique de l'ananas, objet de la première partie de ce document, le cas particulier des travaux menés en Côte d'Ivoire est ici plus précisément abordé. Les objectifs de sélection définis à partir du contexte local ivoirien, le choix des géniteurs utilisés pour la réalisation des hybridations et les techniques mises au point pour la création et le suivi des descendances sont exposés. L'efficacité des méthodes décrites est à base de la sélection qui sera opérée sur la population de grande variabilité induite. 10 photos. (Résumé d'auteur)

    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Agritroparrow_drop_down
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Agritrop
    Article . 1989
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      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Agritroparrow_drop_down
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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      Article . 1989
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Hainzelin, Etienne; Barret, Danielle; Faure, Guy; Dabat, Marie-Hélène; +1 Authors

    Les impacts de la recherche agricole pour le développement se construisent sur le temps long et sont très diversifiés — positifs, inattendus, négatifs. Pour évaluer ces impacts, la méthode ImpresS, qui intègre le point de vue des acteurs de terrain, a été testée sur 13 projets de recherche du Cirad et de ses partenaires. Le message fort qui en découle est d'inciter les institutions de recherche et leurs bailleurs de fonds à modifier leurs pratiques s'ils veulent contribuer plus sûrement aux impacts. Côté recherche : accepter des rôles multiples, agir avec les acteurs de l'innovation et les acteurs politiques, favoriser l'apprentissage, expliciter ex ante les hypothèses de chemin d'impact des projets. Côté commanditaires et bailleurs de fonds : considérer une large gamme d'impacts, inscrire l'action dans le temps long, favoriser les articulations entre projets, permettre de réajuster les projets au fil de leur suivi.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Agritroparrow_drop_down
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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    Article . 2017
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    https://dx.doi.org/10.18167/ag...
    Article . 2017
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Agritroparrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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      Article . 2017
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      https://dx.doi.org/10.18167/ag...
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Blin, Joël; Dabat, Marie-Hélène; Faugère, Garance;

    Ce document a vocation à présenter quelques éléments d 'état des lieux de la situation au Burkina Faso plutôt qu'une analyse, en vue de faciliter les échanges et les comparaisons entre pays autour des enjeux et perspectives des biocarburants pour l'Afrique lors de la conférence. Les thèmes abordés concernent le contexte général de l'agriculture, le contexte environnemental, le contexte énergétique et le contexte des biocarburants. Les données sont quelquefois partielles mais seront complétées après la conférence. Les principales sources statistiques et références bibliographiques utilisées sont listées en fin de document. (Résumé d'auteur)

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Agritroparrow_drop_down
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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    Conference object . 2007
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    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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    Conference object . 2007
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Agritroparrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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      Conference object . 2007
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      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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      Conference object . 2007
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Buffo, Marc; Andrea, Jonathan; Dumoulin, Normand; Guillard, Etienne; +2 Authors

    Cet article présente une méthode qui permet de simuler le courant et la tension d'un arc électrique initié durant l'ouverture d'un contacteur. Basée sur un modèle simplifié de l'arc électrique et de la dynamique des contacts à l'ouverture, cette méthode permet de simuler l'apparition et l'extinction d'un arc, considéré comme une résistance non linéaire. Les paramètres liés à la mécanique et à l'arc sont approximés par des tests expérimentaux sur un contacteur. Les résultats de la simulation sont comparés aux données expérimentales afin de démontrer la validité de la méthode proposée.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Hyper Article en Lig...arrow_drop_down
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Hal
    Article . 2017
    Data sources: Hal
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Hal
    Conference object . 2017
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    https://dx.doi.org/10.18145/ji...
    Other literature type . 2017
    License: CC 0
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      https://dx.doi.org/10.18145/ji...
      Other literature type . 2017
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Caliman, Jean-Pierre; De Kochko, P.;

    La topographie est un des facteurs écologiques importants à étudier avant la mise en place d'une plantation de palmiers à huile [1]. L'accord est unanime pour considérer qu'au-delà d'une certaine pente (variant de 3 à 5 p. 100 suivant les auteurs) les difficultés rencontrées pour la mise en place et l'exploitation de la palmeraie croissent rapidement. De plus, dans ces conditions, l'utilisation du milieu n'est pas optimale : - dégradation des sols par déstructuration de l'horizon supérieur (battance) et amplification des phénomènes d'érosion ; - diminution du coefficient d'utilisation des eaux de pluies due aux pertes par ruissellement. Il est cependant difficile, dans la plupart des cas de se limiter aux terrains où la topographie est idéale, Si bien que certaines mesures doivent être prises pour s'intégrer aux conditions du milieu afin d'en effectuer une exploitation optimale et sauvegarder le potentiel des sols. L'objet des présents " Conseils " est de décrire quelques techniques culturales et travaux spéciaux d'aménagement, comme: - l'abattage et l'andainage orientés en fonction de la topographie ; la construction de diguettes en courbes de niveau ; - les plantations sur terrasses individuelles. (Résumé d'auteur)

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    Article . 1987
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Bastianelli, Denis; Omaria, R.E.; Bonnal, Laurent; Grimaud, Patrice;

    Une étude sur la qualité des matières premières destinées à l'alimentation des volailles a été réalisée en Ouganda et au Kenya. Plus de 600 échantillons ont été collectés et analysés pour déterminer leur composition chimique et estimer leur valeur nutritionnelle. Pour le maïs, la qualité est proche des tables de composition internationales, et la variabilité est modérée. Pour d'autres matières premières comme le son de maïs ou les farines de poisson, la qualité est très variable et éloignée des standards internationaux. En formulation des aliments, la prise en compte de la qualité réelle des matières premières est nécessaire. Cette évaluation est facile lorsqu'un échantillon peut être affecté à une catégorie bien définie et homogène d'une table, en se basant sur son origine ou son aspect. Dans le cas contraire, une analyse doit être pratiquée. Dans le cas des farines de poisson la seule connaissance de la teneur en matières minérales (MM), facile à déterminer, permet l'affectation dans 3 classes de qualité. Pour le son de blé une analyse plus poussée (amidon, fibres) serait nécessaire. Une alternative à l'analyse chimique est l'utilisation de la spectrométrie dans le proche infrarouge (SPIR) qui permet d'estimer rapidement la composition d'un échantillon, ou éventuellement de le classer dans un groupe adapté. (Résumé d'auteur)

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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Penot, Eric; Courbet, Philippe; Chambon, Bénédicte; Ilahang, I.; +1 Authors

    Les "jungle rubber" sont le système agroforestier complexe le plus largement disséminé en Indonésie combinant production et environnement durable. L'amélioration de leur productivité devient nécessaire depuis les années 80. L'alternative proposée par les projets a été, depuis 1970, basée sur la monoculture avec un coût en intrant et travail élevé. L'hévéa reste une "valeur refuge". Avec une capacité financière limitée, les producteurs souhaitent investir dans des systèmes hévéicoles à coûts intermédiaires. Le Smallholder Rubber Agroforestry Project a proposé en approche négociée des systèmes de culture agroforestiers à base d'hévéas clonaux : les Rubber Agroforestry Systems (RAS). Les pratiques agroforestières diminuent le travail et les intrants en période immature. Les freins à l'adoption des innovations restent l'investissement en travail par rapport à des stratégies généralement extensives, le manque et la faible qualité du matériel végétal amélioré et le manque d'information technique. Les possibilités de développement des RAS sont plus actuelles que jamais dans un environnement économique difficile. (Résumé d'auteur)

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    Agritrop
    Article . 1999
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  • Authors: Georges Dossou; Jadix Saïnou; Lucien Agbandji; Précieux Christian Behanzin;

    L’objet de ce travail est d’analyser les déterminants de la demande résidentielle d’énergie électrique au Bénin. L’étude a été réalisée sur 1089 ménages en utilisant les données de l’Enquête sur la Consommation d’Electricité au Bénin (ECEB) conduite en 2014 par l’Institut National de la Statistique et de l’Analyse Economique. Après avoir procédé à une analyse descriptive univariée et bivariée, une modélisation économétrique en données de panel a été mise en œuvre. Le modèle d’analyse de la demande conditionnelle de Dalen et Larsen (2012) utilisé à cet effet a révélé que le sexe du chef de ménage, la taille et le revenu du ménage ainsi que la possession d’appareils électroménagers tels que le ventilateur, le brasseur, le réfrigérateur et la radio influencent la demande résidentielle globale d’énergie électrique des départements contrairement au milieu de résidence (urbain ou rural) et au prix du kilowattheure d’électricité. Repères et Perspectives Economiques, Vol. 4, No 2 (2020)

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    Authors: Schwab, Didier; Riou, Sébastien; Fejza, Amela; Vial, Loïc; +5 Authors

    Afin de développer et d'améliorer une communication Augmentée et alternative (CAA), le regard est souvent considéré comme l'un des moyens les plus naturels et les plus faciles à mettre en place pour permettre aux personnes en situation de polyhandicap d'interagir avec leur environnement. Bien entendu, pour des enfants qui partent par nature de zéro, qui de plus ont de telles difficultés, c'est déjà un grand défi d'acquérir et de soutenir les connaissances de base que cette communication requiert. Les jeux sont souvent considérés comme un bon moyen d'apprendre. Les jeux destinés à être utilisés avec des oculomètres (eye-trackers), c'est-à-dire des dispositifs électroniques capables d'estimer la position du regard, peuvent être un bon moyen d'améliorer les compétences requises comme la fixation et la poursuite oculaire, ainsi que des conventions comme les récompenses ou les interactions de fixation (dwell interaction) souvent utilisées dans les outils de CAA. Dans cet article, nous présentons le projet GazePlay dont la principale contribution est un logiciel libre et gratuit qui rassemble plusieurs mini-jeux compatibles avec tous les oculomètres, y compris les moins chers. In order to develop and enhance an augmentative and alternative communication (AAC), gaze is often considered as one of the most natural way and one of the easiest to set up in order to support individuals with multiple disabilities to interact with their environment. For children who start naturally from scratch, who have in addition such difficulties, it is a strong challenge even to acquire or to support the required basic knowledge. Games are often considered a good way to learn. Games designed for eye-trackers, i.e. electronic devices able to compute the position of the gaze, allow children to discover the power of their eyes and the consequences of the actions triggered by their gazes. Video games can be a good way to improve basic requirements as gaze fixation and gaze pursuit as well as conventions like rewards or dwell interactions often used in AAC tools. In this article, we present the GazePlay project which main contribution is a free and open-source software which gathers several mini-games playable with all eye-trackers including low cost ones.

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  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Gouyon, Anne; Penot, Eric;

    Pendant près de 75 ans on a assisté avec l'hévéaculture à l'extension d'un système agroforestier à faible productivité, sans changement technique significatif. Depuis le début des années 1980, un nombre croissant de petits planteurs cherchent à modifier leurs systèmes de culture pour utiliser les variétés sélectionnées à haut potentiel de rendement, multipliées par greffages (clones) et proposées par les projets de développement. Les paysans ne sont pas tous en mesure de mobiliser les financements nécessaires, de maîtriser les nouvelles techniques et de supporter les risques liés à ces changements. Un programme d'expérimentations est en cours afin de mettre au point des techniques nouvelles qui, en utilisant les méthodes de l'agroforesterie, pourraient permettre au plus grand nombre de planteurs d'augmenter leur revenu, tout en préservant au moins partiellement le milieu forestier des régions concernées

    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Agritroparrow_drop_down
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      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Agritroparrow_drop_down
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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      Conference object . 1997
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      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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      Conference object . 1997
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  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Cabot, Chantal;

    Après l'exposé général traitant de certains aspects de l'amélioration génétique de l'ananas, objet de la première partie de ce document, le cas particulier des travaux menés en Côte d'Ivoire est ici plus précisément abordé. Les objectifs de sélection définis à partir du contexte local ivoirien, le choix des géniteurs utilisés pour la réalisation des hybridations et les techniques mises au point pour la création et le suivi des descendances sont exposés. L'efficacité des méthodes décrites est à base de la sélection qui sera opérée sur la population de grande variabilité induite. 10 photos. (Résumé d'auteur)

    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Agritroparrow_drop_down
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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    Article . 1989
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      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Agritroparrow_drop_down
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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      Article . 1989
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Hainzelin, Etienne; Barret, Danielle; Faure, Guy; Dabat, Marie-Hélène; +1 Authors

    Les impacts de la recherche agricole pour le développement se construisent sur le temps long et sont très diversifiés — positifs, inattendus, négatifs. Pour évaluer ces impacts, la méthode ImpresS, qui intègre le point de vue des acteurs de terrain, a été testée sur 13 projets de recherche du Cirad et de ses partenaires. Le message fort qui en découle est d'inciter les institutions de recherche et leurs bailleurs de fonds à modifier leurs pratiques s'ils veulent contribuer plus sûrement aux impacts. Côté recherche : accepter des rôles multiples, agir avec les acteurs de l'innovation et les acteurs politiques, favoriser l'apprentissage, expliciter ex ante les hypothèses de chemin d'impact des projets. Côté commanditaires et bailleurs de fonds : considérer une large gamme d'impacts, inscrire l'action dans le temps long, favoriser les articulations entre projets, permettre de réajuster les projets au fil de leur suivi.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Agritroparrow_drop_down
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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    Article . 2017
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    https://dx.doi.org/10.18167/ag...
    Article . 2017
    License: CC BY NC SA
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Agritroparrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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      Article . 2017
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      https://dx.doi.org/10.18167/ag...
      Article . 2017
      License: CC BY NC SA
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