| Vol-964 urn:nbn:de:0074-964-1 Copyright © 2013 for the individual papers by the papers' authors. Copying permitted only for private and academic purposes. This volume is published and copyrighted by its editors.

# IIR 2013
Italian Information Retrieval Workshop

### Proceedings of the 4th Italian Information Retrieval Workshop

### Pisa, Italy, January 16-17, 2013.

Edited by

### Roberto Basili (1)
Fabrizio Sebastiani (2)
Giovanni Semeraro (3)

(1) Università di Roma Tor Vergata, Italy
(2) ISTI CNR, Pisa, Italy
(3) Università di Bari Aldo Moro, Italy

## Table of Contents

- Preface

### Session: Theory

- Are There New BM25 Expectations? 1-12
  Emanuele Di Buccio, Giorgio Maria Di Nunzio
- The Bivariate 2-Poisson Model for IR 13-16
  Giambattista Amati, Giorgio Gambosi

### Session: Query Languages & Operations

- A Query Expansion Method based on a Weighted Word Pairs Approach 17-28
  Luca Greco, Massimo De Santo, Paolo Napoletano, Francesco Colace
- A Flexible Extension of XQuery Full-Text 29-32
  Emanuele Panzeri, Gabriella Pasi
- Towards a Qualitative Analysis of Diff Algorithms 33-36
  Gioele Barabucci, Paolo Ciancarini, Angelo Di Iorio, Fabio Vitali
- On Suggesting Entities as Web Search Queries 37-40
  Diego Ceccarelli, Sergiu Gordea, Claudio Lucchese, Franco Maria Nardini, Raffaele Perego

### Session: Image Retrieval

- Visual Features Selection 41-44
  Giuseppe Amato, Fabrizio Falchi, Claudio Gennaro
- Experimenting a Visual Attention Model in the Context of CBIR Systems 45-56
  Franco Alberto Cardillo, Giuseppe Amato, Fabrizio Falchi

### Session: Evaluation

- Cumulated Relative Position: A Metric for Ranking Evaluation 57-60
  Marco Angelini, Nicola Ferro, Kalervo Järvelin, Heikki Keskustalo, Ari Pirkola, Giuseppe Santucci, Gianmaria Silvello
- Visual Interactive Failure Analysis: Supporting Users in Information Retrieval Evaluation 61-64
  Marco Angelini, Nicola Ferro, Giuseppe Santucci, Gianmaria Silvello

### Session: Social Media and Information Retrieval

- Myusic: a Content-based Music Recommender System based on eVSM and Social Media 65-72
  Cataldo Musto, Fedelucio Narducci, Giovanni Semeraro, Pasquale Lops, Marco de Gemmis
- A Preliminary Study on a Recommender System for the Million Songs Dataset Challenge 73-83
  Fabio Aiolli
- Distributional Models vs. Linked Data: Exploiting Crowdsourcing to Personalize Music Playlists 84-87
  Cataldo Musto, Fedelucio Narducci, Giovanni Semeraro, Pasquale Lops, Marco de Gemmis

### Session: Semantics, Natural Language and Applications

- Opinion and Factivity Analysis of Italian Political Discourse 88-99
  Rodolfo Delmonte, Rocco Tripodi, Daniela Gifu
- Distributional Semantics for Answer Re-ranking in Question Answering 100-103
  Piero Molino, Pierpaolo Basile, Annalina Caputo, Pasquale Lops, Giovanni Semeraro
- INSEARCH: A Platform for Enterprise Semantic Search 104-115
  Diego De Cao, Valerio Storch, Danilo Croce, Roberto Basili
- Wikipedia-based Unsupervised Query Classification 116-119
  Milen Kouylekov, Luca Dini, Alessio Bosca, Marco Trevisan

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20-Feb-2013: submitted by Giovanni Semeraro
21-Feb-2013: published on CEUR-WS.org