| 1. |
- Alemu Argaw, Atelach
(author)
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Amharic-English information retrieval with pseudo relevance feedback
- 2008
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In: Advances in multilingual and multimodal information retrieval. - Berlin ; New York : Springer. - 9783540857594 ; , s. 119-126
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Conference paper (other academic/artistic)abstract
- We describe cross language retrieval experiments using Amharic queries and English language document collection from our participation in the bilingual ad hoc track at the CLEF 2007. Two monolingual and eight bilingual runs were submitted. The bilingual experiments designed varied in terms of usage of long and short queries, presence of pseudo relevance feedback (PRF), and three approaches (maximal expansion, first-translation-given, manual) for word sense disambiguation. We used an Amharic-English machine readable dictionary (MRD) and an online Amharic-English dictionary in order to do the lookup translation of query terms. In utilizing both resources, matching query term bigrams were always given precedence over unigrams. Out of dictionary Amharic query terms were taken to be possible named entities in the language, and further filtering was attained through restricted fuzzy matching based on edit distance. The fuzzy matching was performed for each of these terms against automatically extracted English proper names. The Lemur toolkit for language modeling and information retrieval was used for indexing and retrieval. Although the experiments are too limited to draw conclusions from, the obtained results indicate that longer queries tend to perform similar to short ones, PRF improves performance considerably, and that queries tend to fare better when we use the first translation given in the MRD rather than using maximal expansion of terms by taking all the translations given in the MRD.
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| 2. |
- Argaw, Atelach Alemu
(author)
-
Amharic-English Information Retrieval with Pseudo Relevance Feedback
- 2008
-
In: Advances In Multilingual And Multimodal Information Retrieval. - 9783540857594 ; , s. 119-126
-
Conference paper (peer-reviewed)abstract
- We describe cross language retrieval experiments using Amharic queries and English language d ocument collection. Two monolingual and eight bilingual runs were submitted with variations in terms of 1 sage of long and short queries, presence of pseudo relevance feedback (PRF), and approaches for word sense disambiguation (WSD). We used an Amharic-English machine readable dictionary (MRD), and an online Amharic-English dictionary for lookup translation of query terms. Out of dictionary Amharic query terms were considered as possible named entities, and further filtering was attained through restricted fuzzy matching based on edit distance which is calculated against automatically extracted English proper names. The obtained results indicate that longer queries tend to perform similar to short ones, PRF improves performance considerably, and that queries tend to fare better with WSD rather than using maximal expansion of terms by taking all the translations given in the MRD.
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| 3. |
- Bouma, Gosse, et al.
(author)
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Question Answering with Joost at CLEF 2007
- 2008
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In: Lecture Notes in Computer Science. - : Springer Berlin/Heidelberg. - 9783540857594 ; , s. 257-260
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Book chapter (other academic/artistic)
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