In this paper, we report how we do the query expansion in the NTCIR-7 IR4QA subtask. We submit the results of nine runs of this subtask, which is cross-language information retrieval (CLIR) from English to traditional Chinese, simplified Chinese and Japanese in the official T-run, D-run and DN-run. In these runs, we use the Google online translation service to translate query terms and Wikipedi...

1 The Radio, Convergence and Development in Africa (RCDA) program was led by Professor Allan Thompson of Carleton University’s School of Journalism and Communication, who worked closely with research mentors Dr. Mary Myers from the UK and Prof. Joshua Greenberg from Carleton as well as research associate Heather Gilberds, a doctoral candidate in Communication Studies at Carleton. David Smith of...

Carrying out experiments in Information Retrieval is a heavy activity requiring fast tools to treat collections of significant size, and at the same time flexible tools to leave the most possible freedom during the experimentation. System XIOTA was developed to answer the criterion of flexibility and thus to support fast installation of various experiments using automatic natural language treat...

This paper presents work on document retrieval for Italian carried out at ITC-irst. Two different approaches to information retrieval were investigated, one based on the Okapi weighting formula and one based on a statistical model. Development experiments were carried out using the Italian sample of the TREC-8 CLIR track. Performance evaluation was done on the Cross Language Evaluation Forum (C...

– In this paper, we propose a new language model, namely, a dependency structure language model, for information retrieval to compensate for the weakness of bigram and trigram language models. The dependency structure language model is based on the Chow Expansion theory and the dependency parse tree generated by a dependency parser. So, longdistance dependencies can be handled by the dependency...

This paper describes our first participation in the QA@CLEF monolingual and bilingual task, where our objective was to propose a question answering system designed to respond to French queries submitted to search French documents. We wanted to combine a classic information retrieval model (based on the Okapi probabilistic model) with a linguistic approach based mainly on syntactic analysis. In ...

Psychiatric document retrieval attempts to help people to efficiently and effectively locate the consultation documents relevant to their depressive problems. Individuals can understand how to alleviate their symptoms according to recommendations in the relevant documents. This work proposes the use of high-level topic information extracted from consultation documents to improve the precision o...

This report is concerned with the Adaptive Filtering and Web tracks. There are separate reports in this volume [1, 2] on the Microsoft Research Redmond participation in QA track and the Microsoft Research Beijing participation in the Web track.. Two runs were submitted for the Adaptive Filtering track, on the adaptive ltering task only (two optimisation measures), and several runs for the Web t...

Im Information Retrieval (IR) wird die Anwendung spaltenorientierter Datenbankmanagementsysteme (DBMS) diskutiert, um u.a. durch die Trennung von Datenhaltung und Suchlogik zusätzliche Flexibilität zu gewinnen. Es stellt sich die Frage, ob sich solche Systeme für den praktischen Einsatz eignen, oder ob deren Einsatz auf das Prototyping beschränkt ist. Ziel dieser Arbeit ist es daher, IR-Systeme...

Ad hoc passage retrieval within the Wikipedia is examined in the context of INEX 2007. An analysis of the INEX 2006 assessments suggests that fixed sized window of about 300 terms is consistently seen and that this might be a good retrieval strategy. In runs submitted to INEX, potentially relevant documents were identified using BM25 (trained on INEX 2006 data). For each potentially relevant do...