Research

I have worked on a wide spectrum of information access problems ranging from predictive analytics and content tracking to entity linking and online learning to rank. Most of  my research has been conducted during 2007–2014 at Information and Language Processing Systems (ILPS) at the University of Amsterdam and it continues today at 904Labs, but at a lesser publication rate. In the table below, I list a high level overview of my research interests over the years:

Time span Research topic
2014– Online learning to rank, evaluation of learning to rank methods
2012–2014 Entity linking, summarization, recommender systems
2008–2012 Predictive analytics, social media, content tracking
2007–2008 Speech recognition in user generated content

As of September 1st, 2017, I have published 54 papers with a total of 1,069 citations; my H-index is 17. You can access my publications via my Google Scholar profile.

Ph.D. Thesis

Front cover of the book Mining Social Media
Mining Social Media: Tracking Content and Predicting Behavior. Download a copy (PDF, 3.7MB)

I defended my Ph.D. thesis, Mining Social Media: Tracking Content and Predicting Behavior, in December 2012. I worked on my thesis at the University of Amsterdam, under the supervision of Prof.Dr.Maarten de Rijke. Maarten has been a great supervisor and exemplary researcher. Without his guidance and the people from ILPS and my co-authors, this thesis would not have been possible. Thank you.

Download a copy (PDF, 3.7MB)

Community service

I have served as program committee member in the following venues.

Year Venue
2017 Special Interest Group on Information Retrieval (SIGIR)
Transactions on Information Systems (TOIS)
2016 Special Interest Group on Information Retrieval (SIGIR)
Transactions on Information Systems (TOIS)
2015 International Conference on Knowledge Discovery and Information Retrieval (KDIR)
International Conference on Information and Knowledge Management (CIKM)
Information Processing & Management (IPM)
Web Search and Data Mining (WSDM)
Artificial Intelligence (AIRE)
Special Interest Group on Information Retrieval (SIGIR)
Transactions on Information Systems (TOIS)
2014 Workshop on Machine Learning for Predictive Models Information Processing & Management (IPM)
Special Interest Group on Information Retrieval (SIGIR)
Information Retrieval Facility Conference (IRFC)
Workshop on Social Multimedia and Storytelling Neurocomputing Journal
Information Retrieval Journal (IRJ)
Social News On the Web
IEEE’s Transactions on Knowledge and Data Engineering
European Conference on Informantion Retrieval (ECIR)
2013 Journal of Internet Services and Applications
International Joint Conference on Natural Language Processing
International Workshop and Challenge on News Recommender Systems
Information Retrieval Facility Conference (IRFC)
Information Processing & Management (IPM)
Special Interest Group on Information Retrieval (SIGIR)
The Dutch-Belgian Information Retrieval Workshop (DIR)
Transactions on Information Systems (TOIS)
European Conference on Informantion Retrieval (ECIR)
Transactions on the Web (ToW)
Journal of the Association for Information Science and Technology (JASIST)
2012 The Dutch-Belgian Information Retrieval Workshop
European Conference on Informantion Retrieval (ECIR)
2011 Journal of Computer Assisted Learning (JCAL)
2009 Symposium on String Processing and Information Retrieval (SPIRE)

Student supervision

I am happy to have worked with more than a dozen of Ph.D., M.Sc., and B.Sc. students on a variety of research topics for their theses. Some of these masters theses have made it to a publication, some have won national thesis awards and some others have won best paper/poster awards.

Year Student and research topic
2017 Ph.D. David Grauss on Entities of Interest
2014 B.Sc. Thijs van der Velden on real-time music charts on Twitter
M.Sc. Bart Eijk on recommendation ensembles for music discovery
M.Sc. Varvara Tzika on retrieval of classifieds in auction sites
M.Sc. Guido van Bruggen on analyzing real-time context of TV broadcasts
M.Sc. Selvi Ratnasingam on information diffusion across languages in news and social media
M.Sc. Nikos Voskarides on learning entity relations in big data
2013 M.Sc. Kerim Meijer on evaluating performance of distributed search systems
M.Sc. Andrei Oghina on recommending content on news sites
M.Sc. Mathias Breuss on recommending content on Twitter
2012 M.Sc. Mark Bakker on predicting movie Awards using Twitter
B.Sc. Gijs van der Voort on classifying tweets as reviews
2011 B.Sc. Philo Kamenade on information propagation in Twitter
2010 M.Sc. Kamran Massoudi on microblog retrieval

If you are B.Sc. or M.Sc. student looking for an internship or project on the area of query understanding, online learning to rank, and/or evaluation of learning to rank methods, get in touch. We usually have a bunch of cool projects on these areas.

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