BibSonomy publications for /user/nepomuk/2007Thu Jan 17 12:54:10 CET 2008Workshop Proceedings of Lernen - Wissensentdeckung - Adaptivität (LWA 2007)sep13-20Tag Recommendations in Folksonomies20072007 folksonomy from:jaeschke kdml l3s lwa myown recommender tagging Collaborative tagging systems allow users to assign keywords—so called “tags”—to resources. Tags are used for navigation, finding resources and serendipitous browsing and thus provide an immediate benefit for users. These systems usually include tag recommendation mechanisms easing the process of finding good tags for a resource, but also consolidating the tag vocabulary across users. In practice, however, only very basic recommendation strategies are applied. In this paper we present two tag recommendation algorithms: an adaptation of user-based collaborative filtering and a graph-based recommender built on top of FolkRank, an adaptation of the well-known PageRank algorithm that can cope with undirected triadic hyperedges. We evaluate and compare both algorithms on large-scale real life datasets and show that both provide better results than non-personalized baseline methods. Especially the graph-based recommender outperforms existing methods considerably.Thu Jan 10 14:06:40 CET 2008Entwickler Magazin12Aimed for Popular Science and Developers1119-122Semantic Web am Desktop2008200712 2007 dfki from:leobard lang:de nepomuk semanticdesktop semanticweb wp2 Der Semantic Desktop macht den PC zum Denkwerkzeug. Wir haben genug Platz, um all unsere E-Mails, MP3s, Photos, Videos und Dokumente am Desktop zu speichern. Das Problem ist, diese Information zu verwalten. Dateisysteme bieten nur starre Hierarchien an. Tim Berners-Lee und das W3C haben bereits weiter gedacht: Menschen denken in Konzepten, das Semantic Web bietet mit RDF und Ontologien einen auf HTTP, URIs und HTML aufbauenden Standard zur Annotation und Suche. Der Semantic Desktop bringt Betriebssysteme und Anwendungen damit weg von den Dateien, auf die Stufe der Gedanken.Tue Nov 20 16:26:24 CET 2007Proceedings of I-Semantics' 07pp. 201-211The NEPOMUK Project - On the way to the Social Semantic Desktop200709 2007 dfki from:leobard imported nepomuk wp2 This paper introduces the NEPOMUK project which aims to create a standard and reference implementation for the Social Semantic Desktop. We outline the requirements and functionalities that were identified for a useful Semantic Desktop system and present an architecture that fulfills these requirements which was acquired by incremental refinement of the architecture of existing Semantic Desktop prototypes. The NEPOMUK project is primarily motivated by three real-life industrial use-cases, we briefly outline these and the processes used to extract required functionalities from the people working in these areas today, and we present a selection of typical tasks where the Semantic Desktop could be of benefit.Tue Nov 20 16:26:24 CET 2007Proceedings of I-Semantics' 07pp. 211-220From Philosophy and Mental-Models to Semantic Desktop research: Theoretical Overview200709 2007 dfki from:leobard imported nepomuk wp2 This paper examines issues on Philosophy of Artificial Intelligence (AI), Cognitive Science and Mental Models. The paper provides a philosophical grounding for the researchers in Personal Information Management (PIM). An overview is given on various philosophical aspects of computer-based activities. Discussions on the theories relevant to understand the goals for the Semantic Desktop community are elicited. Philosophical theories are not immediately transparent to the programmers, but the ideas discussed here are intended to emphasize a theoretical foundation, with respect to Semantic Desktop long term goals. The goal of this paper is to examine the theories of Philosophy and to provide a conceptual idea to design user-intuitive Semantic Desktops. The paper tries to induce scientific curiosity among the Semantic Desktop researchers as well as to develop the future Semantic Desktops to realize Weak AI.Tue Nov 20 16:26:24 CET 2007Proceedings of I-Semantics' 07pp. 297-304ConTag: A semantic tag recommendation system200709 2007 dfki from:leobard imported nepomuk wp2 ConTag is an approach to generate semantic tag recommendations for documents based on Semantic Web ontologies and Web 2.0 services. We designed and implemented a process to normalize documents to RDF format, extract document topics using Web 2.0 services and finally match extracted topics to a Semantic Web ontology. Due to ConTag we are able to show that the information provided by Web 2.0 services in combination with a Semantic Web ontology enables the generation of relevant semantic tag recommendations for documents. The main contribution of this work is a semantic tag recommendation process based on a choreography of Web 2.0 services.Tue Nov 20 16:26:24 CET 2007Proceedings of I-Semantics' 07pp. 270-277PIMO - a Framework for Representing Personal Information Models200709 2007 dfki from:leobard imported nepomuk wp2 Mon Nov 12 12:55:47 CET 2007Berlin, HeidelbergKnowledge Discovery in Databases: PKDD 2007, 11th European Conference on Principles and Practice of Knowledge Discovery in Databases506-514Lecture Notes in Computer ScienceTag Recommendations in Folksonomies470220072007 folksonomy from:jaeschke l3s myown recommender tagging wp5 Collaborative tagging systems allow users to assign keywords—so called “tags”—to resources. Tags are used for navigation, finding resources and serendipitous browsing and thus provide an immediate benefit for users. These systems usually include tag recommendation mechanisms easing the process of finding good tags for a resource, but also consolidating the tag vocabulary across users. In practice, however, only very basic recommendation strategies are applied. In this paper we evaluate and compare two recommendation algorithms on largescale real life datasets: an adaptation of user-based collaborative filtering and a graph-based recommender built on top of FolkRank. We show that both provide better results than non-personalized baseline methods. Especially the graph-based recommender outperforms existing methods considerably.Wed Jun 13 16:58:36 CEST 2007Sheffield, EnglandProceedings of the 15th International Conference on Conceptual StructuresJulyAnalysis of the Publication Sharing Behaviour in {BibSonomy}20072007 analysis bibsonomy bookmarking fca folksonomy from:jaeschke iccs myown social trias BibSonomy is a web-based social resource sharing system which allows users to organise and share bookmarks and publications in a collaborative manner. In this paper we present the system, followed by a description of the insights in the structure of its bibliographic data that we gained by applying techniques we developed in the area of Formal Concept Analysis.Mon Jun 11 19:44:18 CEST 20074th Conference on Professional Knowledge Management - Experiences and Visions -, March 28. - 30. 2007, Potsdam, Germany03Pattern-Based Task Management: Pattern Lifecycle and Knowledge Management - Benefits and open issues200703 2007 SAP WP10 from:ogr lang:en pattern task taskmanagement Due to their different provenience, a thorough integration between Knowledge Management Systems (KMS) and Knowledge Work Support, e.g., Task Management Systems, is still missing. In the present paper we identify several points of fracture in the information transfer process between both. Hereupon we argue that the recently suggested Pattern-Based Task Management (PBTM) better integrates the two paradigms, leading to an entanglement between both sides. It results a knowledge lifecycle that goes beyond single-loop learning. By the introduction of task patterns that guide users in work planning and execution and motivate collective improvement, PBTM even fosters double-loop learning.Mon Jun 11 19:44:18 CEST 20074th Conference on Professional Knowledge Management - Experiences and Visions -, March 28. - 30. 2007, Potsdam, GermanyTask Management for the NEPOMUK Social Semantic Desktop (Poster)200703 2007 NEPOMUK SAP Semantic Social WP10 announce desktop from:ogr lang:en pattern poster task taskmanagement Mon Jun 11 19:44:18 CEST 20074th Conference on Professional Knowledge Management - Experiences and Visions -, March 28. - 30. 2007, Potsdam, Germany03Pattern-based task management & implicit knowledge - How to mobilize implicit knowledge200703 2007 SAP WP10 from:ogr lang:en pattern task taskmanagement Knowledge work often suffers from the inexpertness of novices in an organization. Therefore, one important goal within knowledge work is to turn novices into experts. For gaining expertise an important factor is implicit knowledge (IK). Even if Information Technology cannot transfer IK directly, it can support the transfer more or less efficiently. We present a knowledge management system, the pattern-based task management (PBTM), which addresses this difficult challenge. Invoking the model of basic communication [Wal05], we show how PBTM aids the experienced user to better provide contextualized knowledge and the inexperienced user to better internalize it again in order to gain expertise. Mon Jun 11 19:44:18 CEST 20074th Conference on Professional Knowledge Management - Experiences and Visions -, March 28. - 30. 2007, Potsdam, Germany03Motivate users to construct collective knowledge via IT - A psychological view on pattern-based task management200703 2007 SAP WP10 from:ogr lang:en pattern task taskmanagement Collective knowledge construction is often inhibited by motivational barriers. In this paper we present pattern-based task management (PBTM) as a system to construct collective knowledge and show ways how to foster motivation. We present the motivational structure of the knowledge sharing situation as a social dilemma which feeds free-riding. To avoid this, we concentrate on ways to overcome the dilemma from a psychological perspective by presenting concrete suggestions on increasing users' motivation to actively participate in PBTM. The goal is to foster collective knowledge con-struction as a social process.