By Cathal Gurrin

These court cases include the papers offered at ECIR 2010, the thirty second european- pean convention on details Retrieval. The convention was once organizedby the data Media Institute (KMi), the Open collage, in co-operation with Dublin urban college and the collage of Essex, and was once supported by way of the knowledge Retrieval expert crew of the British desktop Society (BCS- IRSG) and the targeted curiosity workforce on details Retrieval (ACM SIGIR). It used to be held in the course of March 28-31, 2010 in Milton Keynes, united kingdom. ECIR 2010 obtained a complete of 202 full-paper submissions from Continental Europe (40%), united kingdom (14%), North and South the USA (15%), Asia and Australia (28%), center East and Africa (3%). All submitted papers have been reviewed via 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. accordingly we made up our minds to have presentation codecs for complete papers. a few of them have been awarded orally, the others in poster structure. The presentation structure doesn't characterize any di?erence in caliber. in its place, the presentation structure was once made up our minds after the complete papers have been approved on the software Committee assembly held on the college 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 info for Advances in Information Retrieval: 32nd European Conference on IR Research, ECIR 2010, Milton Keynes, UK, March 28-31, 2010.Proceedings

Example text

C. Gurrin et al. ): ECIR 2010, LNCS 5993, pp. 13–25, 2010. c Springer-Verlag Berlin Heidelberg 2010 14 K. Berberich et al. thanks to improved digitization techniques and preservation efforts, many document collections, including the Web, nowadays contain documents that (i) were published a long time ago and (ii) refer to different times. Consider, as one such document collection, the archive of the New York Times that covers the years 1851–2009. Articles in this archive provide a contemporary but also retrospective account on events during that time period.

When computing P@k, we employ majority voting. Thus, a document is considered relevant to a query, if the majority of workers assessed it as relevant. When computing N@k, the average relevance grade assigned by workers is determined interpreting relevant as grade 1 and not relevant as grade 0, respectively. Table 1. 49 22 K. Berberich et al. Overall. Table 1 gives retrieval-effectiveness figures computed using all queries and cut-off levels k = 5 and k = 10. For each of the five methods under comparison, the table shows the best-performing and worst-performing configuration with their respective parameter values γ and λ.

To illustrate this, consider the two temporal expressions “in the 1980s” and “in the ’80s”. Both share the same formal representation in our model, so that LmT can generate a query containing one of them from a document containing the other. , one not paying special attention to temporal expressions), would not be aware of the semantic connection between the textual terms ’80s and 1980s. 2 Proofs and additional details are provided in our accompanying technical report [10]. 2 K. Berberich et al.

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