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Proceedings of the 4th Italian Information Retrieval Workshop, Pisa, Italy, January 16-17, 2013

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Are There New BM25 Expectations?
Emanuele Di Buccio | Giorgio Maria Di Nunzio

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The Bivariate 2-Poisson Model for IR
Giambattista Amati | Giorgio Gambosi

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A Query Expansion Method based on a Weighted Word Pairs Approach
Luca Greco | Massimo De Santo | Paolo Napoletano | Francesco Colace

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A Flexible Extension of XQuery Full-Text
Emanuele Panzeri | Gabriella Pasi

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Towards a Qualitative Analysis of Diff Algorithms
Gioele Barabucci | Paolo Ciancarini | Angelo Di Iorio | Fabio Vitali

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On Suggesting Entities as Web Search Queries
Diego Ceccarelli | Sergiu Gordea | Claudio Lucchese | Franco Maria Nardini | Raffaele Perego

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Visual Features Selection
Giuseppe Amato | Fabrizio Falchi | Claudio Gennaro

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Experimenting a Visual Attention Model in the Context of CBIR Systems
Franco Alberto Cardillo | Giuseppe Amato | Fabrizio Falchi

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Cumulated Relative Position: A Metric for Ranking Evaluation
Marco Angelini | Nicola Ferro | Kalervo Järvelin | Heikki Keskustalo | Ari Pirkola | Giuseppe Santucci | Gianmaria Silvello

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Visual Interactive Failure Analysis: Supporting Users in Information Retrieval Evaluation
Marco Angelini | Nicola Ferro | Giuseppe Santucci | Gianmaria Silvello

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Myusic: a Content-based Music Recommender System based on eVSM and Social Media
Cataldo Musto | Fedelucio Narducci | Giovanni Semeraro | Pasquale Lops | Marco de Gemmis

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A Preliminary Study on a Recommender System for the Million Songs Dataset Challenge
Fabio Aiolli

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Distributional Models vs. Linked Data: Exploiting Crowdsourcing to Personalize Music Playlists
Cataldo Musto | Fedelucio Narducci | Giovanni Semeraro | Pasquale Lops | Marco de Gemmis

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Opinion and Factivity Analysis of Italian Political Discourse
Rodolfo Delmonte | Rocco Tripodi | Daniela Gîfu

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Distributional Semantics for Answer Re-ranking in Question Answering
Piero Molino | Pierpaolo Basile | Annalina Caputo | Pasquale Lops | Giovanni Semeraro

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INSEARCH: A Platform for Enterprise Semantic Search
Diego De Cao | Valerio Storch | Danilo Croce | Roberto Basili

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Wikipedia-based Unsupervised Query Classification
Milen Kouylekov | Luca Dini | Alessio Bosca | Marco Trevisan