Haggai Roitman  Haggai Roitman photo       

contact information

Lead Researcher & Master Inventor - Information Retrieval
IBM Haifa Research Lab, Haifa, Israel


Professional Associations

Professional Associations:  ACM SIGIR


Hi there!

I'm a lead researcher and a master inventor at IBM Research - Haifa (HRL), a member of the information retrieval research group (Cognitive Analytics & Solutions).

My research interests include Information Retrieval, Social Media, Recommender Systems and Semantic Web.

My main research focus these days is on core IR problems (e.g., Ranking, Passage Retrieval for QA, Fusion and Distributed Search, Query Performance Prediction) and emerging Cognitive IR applications (Dynamic IR and Session Search, NLG, Conversational IR and Dialog).

I have published 50+ related academic papers and 40+ patents (~20 issued so far). I'm actively involved in the research community, including the organization of several related workshops, PC memberships and reviews in leading conferences and journals.

I serve as HRL's Knowledge PIC co-chair.

I'm an adjunct lecturer in the CS department in the University of Haifa. During Winter 2017-8 semster I teach an undergraduate-level course on Databases 101. During Spring 2018 I teach a graduate-level course on Information Retrieval. 
In the past I used to teach other courses both in the University of Haifa and the Technion - Israel Institute of Technology (Web programming, Advanced Interent Topics, Databases, Cognitive Computing Technologies). 

I received the B.Sc degree (2004) in information systems engineering and the Ph.D (2008) degree in information management engineering under the supervision of Prof. Avigdor Gal, both from the Technion - Israel Institute of Technology.