CONFERENCE REPORT CLEF 2011 Conference on Multilingual and Multimodal Information Access Evaluation Paul Clough University of She eld, UK p.d.clough@she eld.ac.uk Julio Gonzalo UNED, Spain julio@lsi.uned.es Nicola Ferro University of Padua, Italy ferro@dei.unipd.it Pamela Forner CELCT, Italy forner@celct.it Bouke Huurnink University of Amsterdam, The Netherlands bhuurnink@uva.nl Mounia Lalmas Yahoo! Research, Spain mounia@acm.org Jaana Kek¨l¨inen aa University of Tampere, Finland Jaana.Kekalainen@uta. Vivien Petras Humboldt University Berlin, Germany vivien.petras@ibi.hu-berlin.de Maarten de Rijke University of Amsterdam, The Netherlands derijke@uva.nl Introduction The CLEF 2011 Conference on Multilingual and Multimodal Information Access Evaluation was held at the University of Amsterdam, the Netherlands, September 19 22, 2011. CLEF 2011 was organized by the Intelligent Systems Laboratory Amsterdam (ISLA) of the Informatics Institute at the University of Amsterdam. Since 2000 the Cross-Language Evaluation Forum (CLEF) has played a leading role in stimulating research and innovation in a wide range of key areas in the domain of information retrieval and search. It has become a landmark in the annual research calendar of the international Information Retrieval and Search community. Through the years, CLEF has promoted the study and implementation of evaluation methodologies for diverse types of retrieval task and search scenario. As a result, a
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