Today, on the occasion of the PhD defense of Pavel Serdyukov, a seminar on enterprise seach was held at the University of Twente. Three of Pavel’s committee members gave talks: David Hawking, Iadh Ounis, and Maarten de Rijke.
The summaries of the talks will soon be uploaded.
Of course, the main attraction of the day was Pavel’s defense. His PhD thesis is entitled The search for expertise: Beyond direct evidence. He was confronted with interesting, and, sometimes quite challenging questions, but handled them to the satisfaction of the committee. Congratulations Pavel, I mean, Dr. Serdyukov!
expert search
Future challenges in expertise retrieval
This was the title of the workshop I organized at SIGIR 2008 in July. The main objective of the workshop was to bring people from different research communities together, to discuss recent advances in expertise retrieval, and to define a research roadmap for the next years.
I think (and I hope I’m not alone with this) that the workshop was a success, with many interesting papers and lively discussions. If you’re interested in expert finding but missed it, now is your chance to find out what themes were discussed; check out the workshop summary that was recently published in the December 2008 issue of SIGIR Forum.
A Language Modeling Framework for Expert Finding
Our first paper on formal models for expertise retrieval, Formal Models for Expert Finding in Enterprise Corpora by Krisztian Balog, Leif Azzopardi, and Maarten de Rijke from SIGIR’06, has been very influential. It has received 70 citations according to Google Scholar so far, and the models we laid down there (especially “Model 2”) have become the de facto baselines against which other approaches compare themselves.
A Language Modeling Framework for Expert Finding, from the same authors, will be published in the January 2009 issue of Information Processing & Management. Actually, it is available online since September 2008, but I have not posted about it yet – so it’s time to make up for it!
The IPM paper can be seen as an extension of the SIGIR’06 work. Additions include the proximity-based versions of candidate and document models (Models 1B and 2B), a solution for setting the smoothing parameter for each model by automatic means, advanced document-candidate associations, and an extensive empirical comparison of the different methods, followed by a detailed analysis of the results.
TREC 2008, 2009
The ILPS group of the University of Amsterdam participated in three tracks at TREC 2008: blog, enterprise, and relevance feedback. The working notes paper describing our approaches is available online.
Results for the Enterprise track were not available at the time of writing, therefore the paper only reports the runs we submitted.
I will present some interesting findings we came across, concerning the expert finding task, at the conference (November 19-21, Gaithersburg, USA). I hope that the title of my talk sounds promising: Now that you’ve bought into Model 2, we’ll tell you why to get Model 1.
After four successful years, the Enterprise track is coming to an end. Personally, I am extremely grateful for the TRECENT Organizers (Peter Bailey, Nick Craswell, Ian Soboroff, Paul Thomas, and Arjen P. de Vries, strictly in alphabetical order) for coordinating the track, and making this platform available to the research community!
A new track, Entity Ranking will run from 2009 that I’m co-organizing with Arjen P. de Vries, Paul Thomas, and Thijs Westerveld. I’m not supposed to share details about it at this point, but it’ll has something to do with searching entities (such as people) in web data. We hope to attract participants that would have performed expert finding at the Enterprise track… specifics should follow after TREC.
PhD thesis online
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My PhD thesis titled People Search in the Enterprise is made available online. Contact me if you want a paperback version! |
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Part of the contributions of the thesis is a collection of resources, including software code, as well as data. These will come in several releases, starting very soon… |