15 research outputs found

    User Interfaces for Personal Knowledge Management with Semantic Technologies

    Get PDF
    This thesis describes iMapping and QuiKey, two novel user interface concepts for dealing with structured information. iMapping is a visual knowledge mapping technique based on zooming, which combines the advantages of several existing approaches and scales up to very large maps. QuiKey is a text-based tool to interact with graph-structured knowledge bases with very high interaction efficiency. Both tools have been implemented and positively evaluated in user studies

    Personal Knowledge Models with Semantic Technologies

    Get PDF
    Conceptual Data Structures (CDS) is a unified meta-model for representing knowledge cues in varying degrees of granularity, structuredness, and formality. CDS consists of: (1) A simple, expressive data-model; (2) A relation ontology which unifies the relations found in cognitive models of personal knowledge management tools, e. g., documents, mind-maps, hypertext, or semantic wikis. (3) An interchange format for structured text. Implemented prototypes have been evaluated

    QuiKey – An Efficient Semantic Command Line

    Full text link
    Abstract. QuiKey is an interaction approach that offers interactive fine grained access to structured information sources in a light weight user interface. It is designed to be highly interaction efficient for searching, browsing and authoring semantic knowledge bases as well as incremen-tally constructing complex queries. Empirical evaluation using a compar-ative GOMS Analysis and a user study confirm interaction efficiency.

    An Interactive Guidance Process Supporting Consistent Updates of RDFS Graphs

    Get PDF
    International audienceWith existing tools, when creating a new object in the Semantic Web, users benefit neither from existing objects and their properties, nor from the already known properties of the new object. We propose UTILIS, an interactive process to help users add new objects. While creating a new object, relaxation rules are applied to its current description to find similar objects, whose properties serve as suggestions to expand the description. A user study conducted on a group of master students shows that students, even the ones disconcerted by the unconventional interface, used UTILIS suggestions. In most cases, they could find the searched element in the first three sets of properties of similar objects. Moreover, with UTILIS users did not create any duplicate whereas with the other tool used in the study more than half of them did

    Création et mise à jour guidées d'objets dans une base RDF(S)

    Get PDF
    National audienceLa mise à jour des bases de connaissances existantes est cruciale pour tenir compte des nouvelles informations, régulièrement découvertes. Toutefois, en pratique, les données actuelles du Web Sémantique sont rarement mises à jour par les utilisateurs. Nous proposons UTILIS, une méthode pour aider les utilisateurs à ajouter de nouveaux objets. Un objet est une ressource de la base. Sa description correspond aux propriétés qu'il possède. Pendant la création d'un nouvel objet o, UTILIS recherche les objets similaires. Les propriétés des objets similaires sont utilisées comme suggestions pour complèter la description de o. Les objets similaires sont trouvés en appliquant des règles de relaxation à la description de o, prise comme une requête. Comparé avec l'état de l'art, la contribution est qu'UTILIS est à la fois incrémental, chaque nouvelle propriété est utilisée pour la recherche, et interactif, l'utilisateur a un rôle actif dans le processus

    Aide à la création d'objets dans une base RDF(S) avec des règles de relaxation

    Get PDF
    National audienceQuand un utilisateur crée un nouvel objet dans le Web sémantique, les outils existants n'exploitent ni les objets existants et leurs propriétés, ni les propriétés déjà connues du nouvel objet. Nous proposons UTILIS, une méthode d'aide à la création de nouveaux objets. UTILIS cherche des objets similaires au nouvel objet en appliquant des règles de relaxation à sa description. Les propriétés des objets similaires servent de suggestions pour compléter la description du nouvel objet. Une étude utilisateur menée avec des étudiants en master montre que les suggestions d'UTILIS ont été utilisées. Les utilisateurs ont trouvé les suggestions pertinentes : dans la plupart des cas, ils pouvaient trouver l'élément recherché dans les trois premiers ensembles de suggestions. De plus, ils les ont appréciées, car la majorité souhaitent les avoir dans un éditeur de données du Web sémantique

    Analisis Distribusi Ayam Broiler di Propinsi Daerah Istimewa YOGYAKARTA

    Full text link
    Production of broiler chicken at Yogyakarta Province exceeds its consumption so that Yogyakarta province becomes one of suppliers of chicken for other regions, especially Jakarta. The objective of this research is to formulate distribution channel of broiler chicken, to determine transmission price elasticity and to estimate margin among distribution chan¬nels. The results show that pattern of production system consists of non-cooperative sys¬tem and cooperative (nucleus-core) system. Distribution channel of the non-cooperative system is more various than of that nucleus-core system. The margin of former system is also more efficient but more risky. Finally, producers are less responsive to price changes than distributors

    Analisis Distribusi Ayam Broiler di Propinsi Daerah Istimewa Yogyakarta

    Get PDF
    Production of broiler chicken at Yogyakarta Province exceeds its consumption so that Yogyakarta province becomes one of suppliers of chicken for other regions, especially Jakarta. The objective of this research is to formulate distribution channel of broiler chicken, to determine transmission price elasticity and to estimate margin among distribution chan¬nels. The results show that pattern of production system consists of non-cooperative sys¬tem and cooperative (nucleus-core) system. Distribution channel of the non-cooperative system is more various than of that nucleus-core system. The margin of former system is also more efficient but more risky. Finally, producers are less responsive to price changes than distributors. Keywords: broiler chickens, distribusion channels, nucleus core system
    corecore