Hossein Vahabi

Hossein (Puya) Vahabi is currently a Postdoctoral Researcher at Yahoo! Labs. He was a Ph.D. student in Computer Science and Engineering (2009 - 2012) at the IMT Institute for Advanced Studies Lucca, Italy. He graduated with a thesis on "Recommendation Techniques for Web Search and Social Media". The thesis was supervised by Prof. Ricardo Baeza-Yates (Vice President of Research for Europe and Latin America, leading the Yahoo! Research labs), and Dr. Fabrizio Silvestri (Senior Researcher at Yahoo! Research and Researcher at National Research Council of Italy).

Education
He received his Bachelor's and Master's degrees in Computer Engineering from University of Modena and Reggio Emilia respectevely in 2006 (Graduated Summa Cum Laude) and 2008 (Graduated Summa Cum Laude). He won a study degree prize in 2006.

Research Interests
"It is often necessary to make choices without sufficient personal experience of the alternatives. In everyday life, we rely on recommendation from other people.", Paul Resnick.
His research interests cover several topics in: real-time graph information extraction, recommender systems, and information retrieval.

Papers 
- Orthogonal Query Recommendation
  RECSYS 2013, proceedings of The 7th International ACM Conference on Recommender Systems, Hong Kong, China
  H. Vahabi, M. Ackerman, D. Loker, R. Baeza-Yates, A. Lopez-Ortiz
- Making Your Interests Follow You on Twitter
  CIKM 2012, proceedings of The 21st ACM Conference on Information and Knowledge Management, Sheraton, Maui Hawaii, United States
  M. Pennacchiotti, F. Silvestri, H. Vahabi, R. Venturini
- Interactive and Context-Aware Tag Spell Check and Correction
  CIKM 2012, proceedings of The 21st ACM Conference on Information and Knowledge Management, Sheraton, Maui Hawaii, United States
  F. Bonchi, O. Frieder, F. Silvestri, FM. Nardini, H. Vahabi
- Efficient Query Recommendations in the Long Tail via Center-Piece Subgraphs
  SIGIR 2012, 35th International ACM SIGIR Conference on Research and Development in Information Retrieval, Portland, United States
  F. Bonchi, R. Perego, F. Silvestri, H. Vahabi, R. Venturini
- How Random Walk Can help Tourism
  ECIR 2012, 34th European Conference on Information Retrieval, Barcelona, Spain
  C. Lucchese, R. Perego, F. Silvestri, H. Vahabi, R. Venturini
- On Tag Spell Checking
  SPIRE 2010, 17th edition of the Symposium on String Processing and Information Retrieval. , Mexico
  F. Silvestri, FM. Nardini, H. Vahabi, P. Vahabi, O. Frieder

Book Chapter
- Mining of User Generated Content
  A Chapter on "recommender systems", to be published in December 2013, CRC PRESS.

Posters
- Recommendations for the Long Tail by Term-Query Graph
  WWW '11 Proceedings of the 20th international conference on World Wide Web -ACM Hyderabad, INDIA 2011
  F. Bonchi, R. Perego, F. Silvestri, H. Vahabi, R. Venturini


Work&Research Experience
- 2014, Postdoctoral Researcher at Yahoo! Labs;
- 2012,2013, Co-Founder of a social web startup: Microblr Ltd;
- 2010,2011, 1 year as a Visiting Researcher at Yahoo! Research Lab Barcelona;
- 2010,2011,2012, he was associated to the Italian National Research Council, Pisa, Italy;
- 2008, Research Software Development Engineer. Responsible for the development and testing of management software, in the research project: “Information Systems for Production and Control of Wide-Sense Labels.” 
- 2007, Research Software Development Engineer. Responsible for the development and testing of a communication driver for embedded system in the regional research project “SWIMM”(Interactive and Multimodal Web Services for the Mobility). The aim of the project was to build a middleware that is able to offer a mobile web service;
- 2006, Research Software Development Engineer. Responsible for the the development and testing of a security network application in the industrial research project: “Remote Communication Systems with high security level” (original title:“ Sistemi di comunicazione remota con elevati standard di sicurezza”).