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Download Advances in Information Retrieval: 35th European Conference by Aleksandr Chuklin, Pavel Serdyukov, Maarten de Rijke PDF

By Aleksandr Chuklin, Pavel Serdyukov, Maarten de Rijke (auth.), Pavel Serdyukov, Pavel Braslavski, Sergei O. Kuznetsov, Jaap Kamps, Stefan Rüger, Eugene Agichtein, Ilya Segalovich, Emine Yilmaz (eds.)

This ebook constitutes the complaints of the thirty fifth ecu convention on IR examine, ECIR 2013, held in Moscow, Russia, in March 2013. The fifty five complete papers, 38 poster papers and 10 demonstrations provided during this quantity have been conscientiously reviewed and chosen from 287 submissions. The papers are equipped within the following topical sections: person points; multimedia and cross-media IR; information mining; IR concept and formal types; IR procedure architectures; class; net; occasion detection; temporal IR, and microblog seek. additionally integrated are four educational and a pair of workshop presentations.

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Extra info for Advances in Information Retrieval: 35th European Conference on IR Research, ECIR 2013, Moscow, Russia, March 24-27, 2013. Proceedings

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In order to verify the stability of our results we split the data into 30 subsets {bt }30 t=1 corresponding to successive days. We then used b2j−1 to train the model and b2j to test it. So we measured how well the model can predict future clicks. We repeated the measurements for all j ∈ {1, . . , 15} to verify significance of our results. We also experimented with the whole data (split into train and test sets) and observed almost identical results. To evaluate a model on a test set we used a standard perplexity metric: for each j j j j N 1 position k we calculated pk = 2− N j=1 (Ck log2 qk +(1−Ck ) log2 (1−qk )) , where Ckj is a binary value corresponding to an observed click on the k-th position in the j-th session, qkj is the predicted probability of a click on the k-th position in the j-th session given the observed previous clicks.

The region of temporal cortex where activity was found is near the border with occipital (visual) cortex and its activity has been shown to reflect visual processing. For example, a recent experiment has shown activity near this region to involve the processing of natural scenes [27]. Beyond the activity of individual brain areas we can consider the organisation of activity within functional networks. The finding of frontal, parietal and temporal regions in the right hemisphere are consistent with several models of how the task demands of judging relevance might map onto functional brain networks.

Twenty years of functional mri: The science and the stories. NeuroImage (2012) 21. : What we can do and what we cannot do with fmri. Nature 453(7197), 869–878 (2008) 22. , Maastricht, Netherlands 23. : Co-planar stereotaxic atlas of the human brain, vol. 147. Thieme, New York (1988) 24. : Analysis of functional image analysis contest (fiac) data with brainvoyager qx: From single-subject to cortically aligned group general linear model analysis and self-organizing group independent component analysis.

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