Vivien Petras

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Query enhancement with domain-specific metadata (thesaurus terms) is analyzed for monolingual and bilingual retrieval on the GIRT social science collection. We describe our technique of Entry Vocabulary Modules, which associates query words with thesaurus terms and suggest its use for monolingual as well as bilingual retrieval. Different weighting and(More)
Translating Dialects in Search: Mapping between Specialized Languages of Discourse and Documentary Languages by Vivien Petras Doctor of Philosophy in Information Management and Systems University of California, Berkeley Professor Michael K. Buckland, Chair The biggest problem in searching an information system is to find the appropriate search terms that(More)
For our participation in CLEF, the Berkeley group participated in the monolingual, multilingual and GIRT tasks. To help enrich the CLEF relevance set for future training, we prepared a manual reformulation of the original German queries which achieved excellent performance, more than 110% better than average of median precision. The GIRT task performed(More)
Purpose The general science portal vascoda merges structured, high-quality information collections from more than 40 providers on the basis of search engine technology (FAST) and a concept which treats semantic heterogeneity between different controlled vocabularies. First experiences with the portal show some weaknesses of this approach which come out in(More)
In this paper, a sample set of 510 simple searches from the TEL action log 2009 is analyzed for query content and query language. More than half of the queries are for named entities, which has consequences for query language disambiguation. A manual identification of query language finds that often a definite language cannot be determined, because many(More)
Berkeley group 2 participated in the GeoCLEF pilot track of CLEF 2005 by performing English and German monolingual geographic information retrieval and bilingual geographic information retrieval using English topics to retrieve German documents and vice versa. Our results were substantially above the medians for all categories. We found that major(More)
In this paper, TEL 2010 action logs are analyzed with a particular focus on the impact of language (user native language and interface language) on the success of a search session. Particular user actions are defined as success indicators for searches and sessions are divided into “successful” and “unsuccessful” sessions with respect to their outcomes. Two(More)
The German Federal Ministry for Education and Research funded a major terminology mapping initiative at the GESIS Social Science Information Centre (GESIS-IZ), which found its conclusion in 2007. The task of this terminology mapping initiative was to organize, create and manage ‘cross-concordances’ between controlled vocabularies (thesauri, classification(More)