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CLEF 2008 Workshop September 17-19, 2008 Aarhus, Denmark
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CLEF 2008 Workshop Aarhus, September 17-19, 2008 T. Mandl et al. Participation Participant Monolingual TasksBilingual TasksTOTAL DEENPTX2DEX2ENX2PT alivale*99 cheshire33366627 csusm1121117 dfki*55 hagen51015 icl99 inaoe*12 jaen*7613 pittsburgh*44 valencia66 xldb12 24 TOTAL96817 137131 2
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CLEF 2008 Workshop Aarhus, September 17-19, 2008 T. Mandl et al. Monolingual vs Bilingual English 3 Bilingual 76% wrt Monolingual
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CLEF 2008 Workshop Aarhus, September 17-19, 2008 T. Mandl et al. 4
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CLEF 2008 Workshop Aarhus, September 17-19, 2008 T. Mandl et al. Monolingual vs BilingualGerman 5 Bilingual 86% wrt Monolingual
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CLEF 2008 Workshop Aarhus, September 17-19, 2008 T. Mandl et al. 6
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CLEF 2008 Workshop Aarhus, September 17-19, 2008 T. Mandl et al. Monolingual vs Bilingual Portuguese 7 Bilingual 90% wrt Monolingual
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CLEF 2008 Workshop Aarhus, September 17-19, 2008 T. Mandl et al. 8
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CLEF 2008 Workshop Aarhus, September 17-19, 2008 T. Mandl et al. Approaches CHESHIRE (1 st all bilingual tasks, 1 st monolingual Portuguese) OKAPI/BM25, Logistic Regression, fusion approaches Geographic Indexing Subsystem using World Gazetteer (not used this year?) LEC Power Translator Hagen (1 st monolingual German) GIRSA (GIR by semantic annotation) Text and location names indexed separately Results of IR and QA combined DFKI (1 st monolingual English) Lucene NER Topic parsing (event part and geographic part) Geographic ontology (using geographic taxonomies such as GeoNames, World Gazetteer) Event ontology (using Wikipedia) 9 XLDB (2 nd monolingual Portuguese) REMBRANDT, language-dependent named- entity recognition (uses Wikipedia) QueryCol, query reformulation: blind relevance feedback, query expansion using geographic ontology MG4J: text index/retrieval, implicit and explicit geographical indexes Jaen (2 nd bilingual English) Lemure SINTRAM (Sinai Translation Module) Location index (Ling Pipe for NER using GeoNames), Query reformulation module AliVale (2 nd monolingual English) Jaen + Fuzzy Borda result merging CSUMS (last in all the tasks[!]) TERRIER index/retrieval (DFR)
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CLEF 2008 Workshop Aarhus, September 17-19, 2008 T. Mandl et al. Some other approaches UPV Lucene GeoWorSE Stanford NER system, Geo WordNet Geo index, text index, WordNet index ICL/KMI Lucene Geografic index, text index NER Sheffield’s GATE Pedia Crawler for geographic co-occurrence Data fusion Pittsburgh Query pattern analysis (geo-part, topic-part) Lingpipe NER WikiGEO INAOE Lemure Re-ranking using geographic expansion process GeoNames, Lingpipe 10
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CLEF 2008 Workshop Aarhus, September 17-19, 2008 T. Mandl et al. Conclusions 11
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