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DCU at NTCIR-8 GeoTime

Qiu, Zhengwei and Gurrin, Cathal and Doherty, Aiden R. and Smeaton, Alan F. (2010) DCU at NTCIR-8 GeoTime. In: NTCIR-8 - The 8th NTCIR Workshop, 15-18 June 2010, Tokyo,Japan. ISBN 978-4-86049-053-9

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In this report, we describe the experiments carried out by Dublin City University for NTCIR GeoTime 2009-10. In all we submitted five runs, which evaluated the benefit of including clustered location information when compared to a standard word-term text IR ranking. The baseline technique was the Lucene default and we developed three different algorithms to re-rank the results based on location occurrance. In conclusion we found that the inclusion of location information to re-rank documents only offered a minor improvement over the baseline. Our analysis leads us believe that larger gains can be made through including location information at the indexing and initial querying stage, and then refining the final ranked list by standard IR techniques.

Item Type:Conference or Workshop Item (Paper)
Event Type:Workshop
Subjects:Computer Science > Information retrieval
DCU Faculties and Centres:Research Initiatives and Centres > Centre for Digital Video Processing (CDVP)
DCU Faculties and Schools > Faculty of Engineering and Computing > School of Computing
Research Initiatives and Centres > CLARITY: The Centre for Sensor Web Technologies
Published in:Proceedings of the 8th NTCIR Workshop Meeting on Evaluation of Information Access Technologies: Information Retrieval, Question Answering, and Cross-Lingual Information Access. . National Institute of Informatics. ISBN 978-4-86049-053-9
Publisher:National Institute of Informatics
Official URL:
Copyright Information:©2010 National Institute of Informatics (NII)
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
Funders:Science Foundation Ireland
ID Code:15398
Deposited On:28 Jul 2010 11:00 by Zhengwei Qiu. Last Modified 01 Mar 2017 17:00

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