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Research Area: Search Technologies |
Profile
I received my Bachelors degree in Applied Mathematics and my master in Artificial Intelligence and Pattern Recognition, both from the university Pierre et Marie Curie, Paris, France.
During my PhD I worked on the application of machine learning techniques (Bayesian Networks) in the field of XML Information Retrieval. I also worked on the development of new evaluation metrics for XML search engines.
I was deeply involved in INEX (The Initiative for the Evaluation of XML Retrieval) and since 2004 I am one of the official organisers.
After my PhD, I worked in the University de Chile on XML databases (XQuery evaluation) and on data mining (web log mining and automatic term hierarchies).
In Yahoo! Research, I focus on web log mining for web search personalization and on query sophistication. My major interests are Machine Learning, Information Retrieval and XML.
Web site:
http://www.bpiwowar.net/
Recent Publications, Projects and News
- Taking advantage of the semantics of a lesson graph based on learning objects Motelet, Olivier ; Baloian, Nelson ; Piwowarski, Benjamin ; Pino, Jose A., The 13th International Conference on Artificial Intelligence in Education (AIED 2007), IOS Press, 2007
- Enhancing Educational-Material Retrieval using Authored-Lesson Metadata Motelet, Olivier ; Piwowarski, Benjamin ; Dupret, Georges ; Pino, Jose A. ; Baloian, Nelson, Fourteenth String Processing and Information Retrieval Symposium (SPIRE 2007), 2007
- Predictive User Click Models Based on Click-through History Piwowarski, Benjamin ; Zaragoza, Hugo, Proceedings of the Sixteenth Conference on Information and Knowledge Management (CIKM 2007), 2007
- Discovering a Term Taxonomy from Term Similarities Using Principal Component Analysis. Bast, Holger ; Dupret, Georges ; Majumdar, Debapriyo ; Piwowarski, Benjamin, Lecture Notes in Computer Science, Springer, 2006
- Evaluation in (XML) Information Retrieval: Expected Precision-Recall with User Modelling (EPRUM) Piwowarski, B. ; Dupret, G., SIGIR 2006: Proceedings of the 29th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, 2006 [view abstract]
- Principal Components for Automatic Term Hierarchy Building Dupret, G. ; Piwowarski,, LNCS 4209, Springer, 2006
- A Statistical Model of Query Log Generation Dupret, G. ; Piwowarski, B. ; Hurtado, C. ; Mendoza, M., LNCS 4209, Springer, 2006
- A Bayesian Network for XML Information Retrieval: Searching and Learning with the INEX Collection Piwowarski, Benjamin ; Gallinari, Patrick, Information Retrieval, 2005 [view abstract]
- An algebra for probabilistic XML Retrieval Piwowarski, Benjamin ; Gallinari, Patrick, The First Twente Data Management Workshop, SIKS, 2004 [view abstract]
- Providing Consistent and Exhaustive Relevance Assessments for XML Retrieval Evaluation Piwowarski, Benjamin ; Lalmas, Mounia, Proceedings of the Thirteenth Conference on Information and Knowledge Management (CIKM 2004), 2004 [view abstract]
- Interface pour l'évaluation de systèmes de recherche sur des documents XML Piwowarski, Benjamin ; Lalmas, Mounia, Premiere COnference en Recherche d'Information et Applications (CORIA'04), Hermès, 2004
- An algebra for Structured Queries in Bayesian Networks Vittaut Jean-Noël, Gallinari Patrick Piwowarski Benjamin, LNCS, 2004 [view abstract]
- Filtering in XML Retrieval: a Prospective Analysis Vu, Huyen-Trang ; Piwowarski, Benjamin ; Gallinari, Patrick, XML and Information Retrieval workshop of SIGIR 2004, 2004 [view abstract]
- INEX Guidelines for Topic Development Kazai, Gabriella ; Lalmas, Mounia ; Piwowarski, Benjamin, Proceedings of INEX 2003, 2003
- Expected Ratio of Relevant Units: A Measure for Structured Information Retrieval Piwowarski, Benjamin ; Gallinari, Patrick, INitiative for the Evaluation of XML Retrieval (INEX). Proceedings of the Second INEX Workshop, LIP6, Université Paris 6, 2003 [view abstract]
- Working group report: the Assessment Tool Piwowarski, Benjamin, INitiative for the Evaluation of XML Retrieval (INEX). Proceedings of the Second INEX Workshop, 2003 [view abstract]
- Techniques d'apprentissage pour le traitement d'informations structurées : application à la recherche d'information Piwowarski, Benjamin, Université Pierre et Marie Curie, 2003 [view abstract]
- A Machine Learning Model for Information Retrieval with Structured Documents Piwowarski, Benjamin ; Gallinari, Patrick, Machine Learning and Data Mining in Pattern Recognition, Springer Verlag, 2003 [view abstract]
- Structure, recherche d'information et apprentissage Piwowarski, Benjamin ; Gallinari, Patrick, Journées francophones d'Extraction et de Gestion des Connaissances (EGC 2003), 2003 [view abstract]
- Bayesian Networks and INEX'03 Piwowarski, Benjamin ; Vu, Huyen-Trang ; Gallinari, Patrick, INitiative for the Evaluation of XML Retrieval (INEX). Proceedings of the Second INEX Workshop, 2003 [view abstract]