| Vol-791 urn:nbn:de:0074-791-2 Copyright © 2011 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.

# CARS'11
Context-Aware Recommender Systems 2011

### Proceedings of the 3rd Workshop on Context-Aware Recommender Systems

#### in conjunction with the 5th ACM Conference on Recommender Systems (RecSys 2011)

### Chicago, IL, USA, October 23, 2011.

Edited by

### Gedas Adomavicius *
Linas Baltrunas **
Tim Hussein +
Francesco Ricci **
Alexander Tuzhilin ++

* University of Minnesota, USA
** Free University of Bozen-Bolzano, Italy
+ University of Duisburg-Essen, Germany
++ New York University, USA

## Table of Contents

1. Preface
   Gedas Adomavicius, Linas Baltrunas, Tim Hussein, Francesco Ricci, Alexander Tuzhilin
2. Top-N recommendations on unpopular items with contextual knowledge
   Paolo Cremonesi, Paolo Garza, Elisa Quintarelli, Roberto Turrin
3. Model adaptation with Bayesian hierarchical modeling for context-aware recommendation
   Hideki Asoh, Yoichi Motomura, Chihiro Ono
4. A contextual modeling approach to context-aware recommender systems
   Umberto Panniello, Michele Gorgoglione
5. Implicit feedback recommendation via implicit-to-explicit ordinal logistic regression mapping
   Denis Parra, Alexandros Karatzoglou, Xavier Amatriain, Idil Yavuz
6. Hourly traffic prediction of news stories
   Luis Marujo, Miguel Bugalho, Joao P. Neto, Anatole Gershman, Jaime Carbonell
7. Large scale evaluation of multi-mode recommender system using predicted contexts with mobile phone users
   Takashi Shiraki, Chihiro Ito, Takeo Ohno
8. Inferring contextual user profiles - improving recommender performance
   Alan Said, Ernesto W. De Luca
9. Effects of relevant contextual features in the performance of a restaurant recommender system
   Blanca Vargas-Govea, Juan Gabriel Gonzalez-Serna, Rafael Ponce-Medellin

16-Oct-2011: submitted by Tim Hussein
18-Oct-2011: published on CEUR-WS.org