817 research outputs found

    Recommendations for the representation of hierarchical objects in Europeana

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    The issue of handling hierarchical objects has been always an important topic for Europeana’s network of projects and Data Providers. The implementation of solutions in the Europeana portal has been delayed for a long time mainly due to the fact that complex objects required the development of new functionalities that could not be supported by the Europeana Semantic Elements (ESE) model. Indeed the simplicity and the flatness of this model prevented Data Providers from supplying complex objects

    Achieving interoperability between the CARARE schema for monuments and sites and the Europeana Data Model

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    Mapping between different data models in a data aggregation context always presents significant interoperability challenges. In this paper, we describe the challenges faced and solutions developed when mapping the CARARE schema designed for archaeological and architectural monuments and sites to the Europeana Data Model (EDM), a model based on Linked Data principles, for the purpose of integrating more than two million metadata records from national monument collections and databases across Europe into the Europeana digital library.Comment: The final version of this paper is openly published in the proceedings of the Dublin Core 2013 conference, see http://dcevents.dublincore.org/IntConf/dc-2013/paper/view/17

    Using Quantitative Aspects of Alignment Generation for Argumentation on Mappings

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    State-of-the art mappers articulate several techniques using diïŹ€erent sources of knowledge in an uniïŹed process. An important issue of ontology mapping is to ïŹnd ways of choosing among many techniques and their variations, and then combining their results. For this, an innovative and promising option is to use frameworks dealing with arguments for or against correspondences. In this paper, we re-use an argumentation framework that considers the conïŹdence levels of mapping arguments. We also propose new frameworks that use voting as a way to cope with various degrees of consensus among arguments. We compare these frameworks by evaluating their application to a range of individual mappers, in the context of a real-world library case

    Cooperative Behaviours with Swarm Intelligence in Multirobot Systems for Safety Inspections in Underground Terrains

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    Underground mining operations are carried out in hazardous environments. To prevent disasters from occurring, as often as they do in underground mines, and to prevent safety routine checkers from disasters during safety inspection checks, multirobots are suggested to do the job of safety inspection rather than human beings and single robots. Multirobots are preferred because the inspection task will be done in the minimum amount of time. This paper proposes a cooperative behaviour for a multirobot system (MRS) to achieve a preentry safety inspection in underground terrains. A hybrid QLACS swarm intelligent model based on Q-Learning (QL) and the Ant Colony System (ACS) was proposed to achieve this cooperative behaviour in MRS. The intelligent model was developed by harnessing the strengths of both QL and ACS algorithms. The ACS optimizes the routes used for each robot while the QL algorithm enhances the cooperation between the autonomous robots. A description of a communicating variation within the QLACS model for cooperative behavioural purposes is presented. The performance of the algorithms in terms of without communication, with communication, computation time, path costs, and the number of robots used was evaluated by using a simulation approach. Simulation results show achieved cooperative behaviour between robots

    Europeana and (many) linked open vocabularies

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    LOV Symposium: Linking and Opening Vocabularies = Simposium LOV: abriendo y enlazando vocabularios. Getafe (Madrid), 18th June 201

    DOE : une mise en oeuvre d'une méthode de structuration différentielle pour les ontologies

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    troncy2002aNational audienceL'INA s'intĂ©resse aux ontologies car celles-ci peuvent ĂȘtre utilisĂ©es comme des sources de descripteurs permettant d'indexer des documents audiovisuels. Les mĂ©thodologies et les outils pour construire de tels objets existent, mais peu proposent une aide concrĂȘte pour organiser les concepts entre eux et expliciter le sens attribuĂ© aux termes mobilisĂ©s. Cet article propose d'utiliser une mĂ©thodologie basĂ©e sur la sĂ©mantique diffĂ©rentielle pour normaliser le sens des termes manipulĂ©s dans l'ontologie. Il prĂ©sente un Ă©diteur d'ontologies, DOE, dont l'objectif est de prendre en charge cette mĂ©thodologie, et avec lequel plusieurs ontologies sont actuellement en cours de construction

    Le management multi-projet dans les petites et moyennes entreprises

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    Dans un contexte de mondialisation et de croissance Ă©conomique, les organisations ont depuis toujours et de plus en plus le souci de la bonne gestion, raison pour laquelle elles tentent tous les jours de mettre en application les mĂ©thodes de bonnes pratiques dans le but d’atteindre les objectifs qu’elles se fixent. L’organisation, tout au long de son cycle de vie, en plus de la gestion de ses activitĂ©s courantes (opĂ©rationnelles), doit aussi mener Ă  bien ses projets. La gestion de projet compte plusieurs approches, parmi lesquelles on retrouve le management multi-projet. D’aprĂšs Fernez-Walch et Triomphe (2004), le management multi-projet « vise Ă  gĂ©rer de façon globale un ou plusieurs ensembles de projets, en tenant compte des interdĂ©pendances entre les projets d'un mĂȘme ensemble ». De nombreuses recherches ont portĂ© sur le management multi-projet dans le cas des grandes entreprises multinationales et des organismes gouvernementaux, faisant part des outils, techniques et pratiques mis en place dans ces grosses boĂźtes, ainsi que des difficultĂ©s auxquelles elles font face. Cependant, peu de recherches se sont penchĂ©es sur le cas des organisations, Ă  plus petite structure, disposant de ressources plus modestes, comme les petites et moyennes entreprises (PME). D’oĂč notre question de recherche : comment les PME, avec ce qui les caractĂ©rise, font du management multi-projet ? L’approche interprĂ©tative est la dĂ©marche qui nous permettra de rĂ©pondre au mieux et de façon cohĂ©rente aux questions qui nous animent. Afin d’apporter des rĂ©ponses Ă  notre question de recherche, nous nous sommes fixĂ©s comme objectif gĂ©nĂ©ral, d’examiner les mĂ©thodes de management multi-projet utilisĂ©es dans les petites et moyennes entreprises, Ă  travers d’autres objectifs spĂ©cifiques. C’est Ă  travers une mĂ©thode de recherche exploratoire que notre Ă©tude s’inscrivant dans une typologie d’approche qualitative va ĂȘtre rĂ©alisĂ©e. Des entrevues semi-dirigĂ©es avec diffĂ©rents responsables de projet de petites et moyennes entreprises de la ville du Saguenay ont Ă©tĂ© menĂ©es selon une dĂ©marche Ă©thique en vue de collecter des donnĂ©es qui ont Ă©tĂ© par la suite traitĂ©es, analysĂ©es et interprĂ©tĂ©es Ă  l’aide du logiciel d’analyse qualitative Nvivo 10 pour en dĂ©duire les rĂ©sultats. Les rĂ©sultats tirĂ©s de notre dĂ©marche scientifique, nous permettent d’affirmer que les petites et moyennes entreprises Ă©voluant dans le multi-projet mettent en application la quasi-totalitĂ© des processus de management de projet proposĂ©s par le PMBOK, comme les grandes entreprises, mĂȘme si elles ne le font pas toujours de façon formelle, structurĂ©e et ne les maitrisent pas toutes. Il nous est ressorti aussi que dans leur management multi-projet, les responsables de projet dans les PME rencontrent des difficultĂ©s semblables Ă  celles de leurs confrĂšres travaillant dans les grandes entreprises. MalgrĂ© les limites de notre projet de recherche, nous avons pu formuler des suggestions de bonnes pratiques, afin aider les responsables de projet des PME dans leur management multi-projet

    Constraints in Marketing of Agroforestry Products in the South West Region of Cameroon: The Case of Manyu Division

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    Cameroon’s South West region has great potentials in the production of Agroforestry products but production and marketing are done using rudimentary technologies, which make it difficult to sustain growing demand for the products in both domestic and international markets. Difficulties in production have been attributed to social, economic, environmental and other constraints which grossly affect production and marketing. The main objective of the study is to examine difficulties encountered by actors in Agroforestry activities and how these problems affect marketing and income generation in the study area. The study was carried out in eleven random selected villages producing agroforestry products while respondents were selected through purposive sampling. Data collected for the study were anaylsed through qualitative and quantative methods. According to this study, marketing of agroforestry products in Manyu Division and else where in Cameroon can only play a significant role in poverty alleviation, if government and other stalkholders could  provide an enabling enrivornment backed by packages of incentives and motivations. This will significantly minimise production and marketing  problems encountered by actors and stalkholders in the agroforestry value chain
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