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By Cathal Gurrin

These court cases comprise the papers awarded at ECIR 2010, the thirty second european- pean convention on details Retrieval. The convention used to be organizedby the data Media Institute (KMi), the Open collage, in co-operation with Dublin urban collage and the college of Essex, and was once supported by way of the knowledge Retrieval professional staff of the British computing device Society (BCS- IRSG) and the certain curiosity team on details Retrieval (ACM SIGIR). It was once held in the course of March 28-31, 2010 in Milton Keynes, united kingdom. ECIR 2010 acquired a complete of 202 full-paper submissions from Continental Europe (40%), united kingdom (14%), North and South the USA (15%), Asia and Australia (28%), heart East and Africa (3%). All submitted papers have been reviewed by way of at leastthreemembersoftheinternationalProgramCommittee.Outofthe202- pers forty four have been chosen asfull researchpapers. ECIR has alwaysbeen a convention with a powerful pupil concentration. to permit as a lot interplay among delegates as attainable and to maintain within the spirit of the convention we determined to run ECIR 2010 as a single-track occasion. consequently we made up our minds to have presentation codecs for complete papers. a few of them have been provided orally, the others in poster layout. The presentation layout doesn't symbolize any di?erence in caliber. in its place, the presentation layout used to be determined after the whole papers were authorised on the software Committee assembly held on the collage of Essex. The perspectives of the reviewers have been then considered to pick the main acceptable presentation structure for every paper.

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Extra resources for Advances in Information Retrieval: 32nd European Conference on IR Research, ECIR 2010, Milton Keynes, UK, March 28-31, 2010.Proceedings

Example text

Building on TARSQI’s output, we extracted range temporal expressions such as “from 1999 until 2002”, which TARSQI does not yet support. Further, we added each article’s publication date as an additional temporal expression. We map temporal expressions to our quadruple representation using milliseconds as chronons and the UNIX epoch as our reference time-point. 2 Experimental Results We measure the retrieval effectiveness of the methods under comparison using Precision at k (P@k) and nDCG at k (N@k) as two standard measures.

For a temporal resolution with chronons corresponding to days (hours) the total number of time intervals that this temporal expression can refer to is 66, 795 (38, 373, 180). Fortunately, though, there is a more efficient way to evaluate (9). 5 · (tbu − tel ) · (tbu − tel + 1) . This captures that only end points e ≥ max(b, tel ) are compatible with a fixed begin point b. The derivation of (10) is given in the appendix. Let Q = ( qbl , qbu , qel , qeu ) be a query temporal expression. Using (10) we can determine |Q|.

This A Language Modeling Approach for Temporal Information Needs 23 demonstrates that (i) considering the uncertainty inherent to temporal expressions is essential and (ii) excluding terms that constitute a temporal expression from the textual part of the query is beneficial. These findings are confirmed by a second experiment on a snapshot of the English Wikipedia [14]2 . 5 Related Work We now put our work in context with existing prior research. Alonso et al. [15] highlight the importance of temporal information in Information Retrieval, and suggest the problem addressed in this work as one not yet satisfactorily supported by existing approaches.

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