| 1. |
- Li, Ying, et al.
(author)
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An approach for repairing incoherent ontologies
- 2021
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In: Proceedings of the ISWC 2021 Posters, Demos and Industry Tracks: From Novel Ideas to Industrial Practice.. - Aachen, Germany : CEUR Workshop Proceedings.
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Conference paper (peer-reviewed)abstract
- The quality of ontologies and their alignments is crucial for developing high-quality ontology-based applications. In this paper we propose an approach for repairing incoherent ontologies and ontology networks that is based on axiom weakening and completion.
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| 2. |
- Säfvenberg, Rasmus, 1998-, et al.
(author)
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The Importance of Special Teams in Ice Hockey
- 2023
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In: Proceedings of the Linköping Hockey Analytics Conference LINHAC 2023 Research Track. - Linköping, Sweden : Linköping University Electronic Press. ; , s. 53-65
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Conference paper (peer-reviewed)abstract
- This paper explores the significance of special teams, particularlypowerplay, in ice hockey. Despite the commonly held perception oftheir importance, little research has examined the impact of powerplayand penalty kill performance on overall team success. The paper usesseveral seasons of NHL data to characterize goal-scoring and manpoweropportunities, and perform analysis from several perspectives. The resultsindicate that individual even strength goals and powerplay goalshave similar value, but the larger share of even strength goals scoredover a season makes even strength play a more important contributorto team success. The paper also finds a high correlation between teamsthat perform above/below average during even strength and powerplay.This study provides valuable insights into the dynamics of ice hockeygameplay and the role of special teams in determining team success.
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| 3. |
- Lambrix, Patrick, et al.
(author)
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Evaluation of ontology merging tools
- 2003
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In: Pacific Symposium on Biocomputing. - : World Scientific. - 9812382178 ; , s. 589-600
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Conference paper (peer-reviewed)abstract
- Ontologies are being used nowadays in many areas, including bioinformatics. One of the issues in ontology research is the aligning and merging of ontologies. Tools have been developed for ontology merging, but they have not been evaluated for their use in bioinformatics. In this paper we evaluate two of the most well-known ontology merging tools with a bioinformatics perspective. As test ontologies we have used Gene Ontology and Signal-Ontology.
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| 4. |
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| 5. |
- Ivanova, Valentina, 1983-, et al.
(author)
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Alignment Cubes: Towards Interactive Visual Exploration and Evaluation of Multiple Ontology Alignments
- 2017
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In: The Semantic Web – ISWC 2017 16th International Semantic Web Conference, Vienna, Austria, October 21–25, 2017, Proceedings, Part I. - Cham, Switzerland : Springer Publishing Company. - 9783319682877 - 9783319682884 - 9783319682884 ; , s. 400-417
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Conference paper (peer-reviewed)abstract
- Ontology alignment is an area of active research where many algorithms and approaches are being developed. Their performance is usually evaluated by comparing the produced alignments to a reference alignment in terms of precision, recall and F-measure. These measures, however, only provide an overall assessment of the quality of the alignments, but do not reveal differences and commonalities between alignments at a finer-grained level such as, e.g., regions or individual mappings. Furthermore, reference alignments are often unavailable, which makes the comparative exploration of alignments at different levels of granularity even more important. Making such comparisons efficient calls for a “human-in-the-loop” approach, best supported through interactive visual representations of alignments. Our approach extends a recent tool, Matrix Cubes, used for visualizing dense dynamic networks. We first identify use cases for ontology alignment evaluation that can benefit from interactive visualization, and then detail how our Alignment Cubes support interactive exploration of multiple ontology alignments. We demonstrate the usefulness of Alignment Cubes by describing visual exploration scenarios, showing how Alignment Cubes support common tasks identified in the use cases.
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| 6. |
- Ivanova, Valentina, et al.
(author)
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Requirements for and Evaluation of User Support for Large-Scale Ontology Alignment
- 2015
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In: The Semantic Web. Latest Advances and New Domains. - Cham : Springer Science+Business Media B.V.. - 9783319188171 - 9783319188188 ; , s. 3-20
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Conference paper (peer-reviewed)abstract
- Currently one of the challenges for the ontology alignment community is the user involvement in the alignment process. At the same time, the focus of the community has shifted towards large-scale matching which introduces an additional dimension to this issue. This paper aims to provide a set of requirements that foster the user involvement for large-scale ontology alignment tasks.Further, we present and discuss the results of a literature study for 7 ontology alignments systems as well as a heuristic evaluation and an observational user study for 3 ontology alignment systems to reveal the coverage of the requirements in the systems and the support for the requirements in the user interfaces.
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| 7. |
- Ivanova, Valentina, et al.
(author)
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User Involvement for Large-Scale Ontology Alignment
- 2014
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In: International Workshop on Visualizations and User Interfaces for Knowledge Engineering and Linked Data Analytics. ; , s. 34-47
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Conference paper (peer-reviewed)
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| 8. |
- Pesquita, Catia, et al.
(author)
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A Framework to Conduct and Report on Empirical User Studies in Semantic Web Contexts
- 2018
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In: Knowledge Engineering and Knowledge Management 21st International Conference, EKAW 2018, Nancy, France, November 12-16, 2018, Proceedings. - Cham : Springer International Publishing. ; , s. 567-583
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Conference paper (peer-reviewed)abstract
- Semantic Web technologies are being applied to increasingly diverse areas where user involvement is crucial. While a number of user interfaces for Semantic Web systems have become available in the past years, their evaluation and reporting often still suffer from weaknesses. Empirical evaluations are essential to compare different approaches, demonstrate their benefits and reveal their drawbacks, and thus to facilitate further adoption of Semantic Web technologies. In this paper, we review empirical user studies of user interfaces, visualizations and interaction techniques recently published at relevant Semantic Web venues, assessing both the user studies themselves and their reporting. We then chart the design space of available methods for user studies in Semantic Web contexts. Finally, we propose a framework for their comprehensive reporting, taking into consideration user expertise, experimental setup, task design, experimental procedures and results analysis.
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| 9. |
- Lambrix, Patrick, et al.
(author)
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Towards Creating a Knowledge Base for World-Wide Web Documents
- 1997. - 1
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In: Proceedings of the IASTED International Conference on Intelligent Information Systems. - : IEEE. - 0818682183 ; , s. 507-511
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Conference paper (peer-reviewed)abstract
- The lack of organization of the information on the web results in non-efficient information retrieval. Several approaches for improvement have been suggested. We propose to use a document knowledge base that contains semantic and structural information concerning the retrievable documents that is extracted from the actual documents. We show that using such a knowledge base gives a number of advantages among which advanced query functionality. We also discuss the creation of such a knowledge base and in particular we show how we can automatically extract structural information from HTML documents for addition to the document base.
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| 10. |
- Freire, Sergio Miranda, et al.
(author)
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Performance of XML Databases for Epidemiological Queries in Archetype-Based EHRs
- 2012
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In: Proceedings Scandinavian Conference on Health Informatics 2012. - Linköping : Linköping University Electronic Press. - 9789175197586 ; , s. 51-57
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Conference paper (peer-reviewed)abstract
- There are very few published studies regarding the performance of persistence mechanisms for systems that use the openEHR multi level modelling approach. This paper addresses the performance and size of XML databases that store openEHR compliant documents. Database size and response times to epidemiological queries are described. An anonymized relational epidemiology database and associated epidemiological queries were used to generate openEHR XML documents that were stored and queried in four opensource XML databases. The XML databases were considerably slower and required much more space than the relational database. For population-wide epidemiological queries the response times scaled in order of magnitude at the same rate as the number of records (total database size) but were orders of magnitude slower than the original relational database. For individual focused clinical queries where patient ID was specified the response times were acceptable. This study suggests that the tested XML database configurations without further optimizations are not suitable as persistence mechanisms for openEHR-based systems in production if population-wide ad hoc querying is needed.
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