Sometimes users of a multimedia retrieval system are not able to explicitly state their information need. They rather want to browse a collection in order to get an overview and to discover interesting content. In pre...
详细信息
Currently the user's web search is disjoint from the resources which is subsequently browsed. Specifically the related instances of the search are not displayed on the following pages. This lack of continuity betw...
详细信息
The evaluation of learner and tutor feedback is essential in the production of high quality personalized eLearning services. There are few evaluations available in the Adaptive Hypermedia domain relative to the amount...
详细信息
Recent research has demonstrated how the widespread adoption of collaborative tagging systems yields emergent semantics. In recent years, much has been learned about how to harvest the data produced by taggers for eng...
详细信息
Recent research has demonstrated how the widespread adoption of collaborative tagging systems yields emergent semantics. In recent years, much has been learned about how to harvest the data produced by taggers for engineering light-weight ontologies. For example, existing measures of tag similarity and tag relatedness have proven crucial step stones for making latent semantic relations in tagging systems explicit. However, little progress has been made on other issues, such as understanding the different levels of tag generality (or tagabstrcatsness), which is essential for, among others, identifying hierarchical relationships between concepts. In this paper we aim to address this gap. Starting from a review of linguistic definitions of wordabstrcatness, we first use several large-scale ontologies and taxonomies as grounded measures of word generality, including Yago, Wordnet, DMOZ and Wikitaxonomy. Then, we introduce and apply several folksonomy-based methods to measure the level of generality of given tags. We evaluate these methods by comparing them with the grounded measures. Our results suggest that the generality of tags in social tagging systems can be approximated with simple measures. Our work has implications for a number of problems related to social tagging systems, including search, tag recommendation, and the acquisition of light-weight ontologies from tagging data.
This paper presents an overview on the VIKAMINE1 system, an open-source Eclipsebased2 mining environment. VIKAMINE focuses on efficient and effective techniques for pattern mining and subgroup discovery;it is implemen...
详细信息
This paper presents an overview on the VIKAMINE1 system, an open-source Eclipsebased2 mining environment. VIKAMINE focuses on efficient and effective techniques for pattern mining and subgroup discovery;it is implemented as rich-client platform (RCP) application, providing a solid framework for high extensibility. We present the system and sketch applications in medical and technical domains.
The increased digitisation of cultural collections and their availability on the World Wide Web has made access to these valuable documents much easier than ever before. However, despite the increased availability of ...
详细信息
Map-based visualizations – sometimes also called projections – are a popular means for exploring music collections. But how useful are they if the collection is not static but grows over time? Ideally, a map that a ...
详细信息
WeSeE-Match is a simple, element-based ontology matching tool. Its basic technique is invoking a web search engine request for each concept and determining element similarity based on the similarity of the search resu...
详细信息
WeSeE-Match is a simple, element-based ontology matching tool. Its basic technique is invoking a web search engine request for each concept and determining element similarity based on the similarity of the search results obtained. Multi-lingual ontologies are translated using a standard web based translation service. Furthermore, it implements a simple strategy for selecting candidate mappings interactively.
A common approach to mitigate the effects of ontology heterogeneity is to discover and express the specific correspondences between different ontologies. An open research question is: how should such ontology mappings...
详细信息
ISBN:
(纸本)1902956850
A common approach to mitigate the effects of ontology heterogeneity is to discover and express the specific correspondences between different ontologies. An open research question is: how should such ontology mappings be represented. In recent years several proposals for an ontology mapping representation have been published, but till today no format is officially standardized or generally accepted in the community. In this paper we will present a new evaluation framework for ontology mapping representations for a pragmatic state of the art overview of their characteristics. In particular we are interested how current ontology mapping representations can support the management of ontology mappings (sharing, re-use, alteration) as well as how suitable they are for different mapping tasks.
暂无评论