Archive for the 'Photos' Category

Quality from Twente

Monday, May 3rd, 2010, posted by Djoerd Hiemstra

FC Twente Champions of the Netherlands!

Newest logo UT a real bargain ;-)

Strong Twente delegation at DIR 2010

Thursday, January 28th, 2010, posted by Djoerd Hiemstra

DIR 2010

Photos taken by Wessel Kraaij and Suzan Verberne during DIR 2010 in Nijmegen are now on-line

Russian Summer School in Information Retrieval

Friday, August 14th, 2009, posted by Djoerd Hiemstra

I will give several lectures on information retrieval modeling at the Russian Summer School in Information Retrieval, which will be held September 11-16, 2009 in Petrozavodsk, Russia. The main audience of the school is graduate and post-graduate students, young scientists and professionals who have experience in development of information retrieval applications. The school will host approximately 100 participants.

Information Retrieval Modeling
There is no such thing as a dominating model or theory of information retrieval, unlike the situation in for instance the area of databases where the relational model is the dominating database model. In information retrieval, some models work for some applications, whereas others work for other applications. For instance, vector space models are well-suited for similarity search and relevance feedback in many (also non-textual) situations if a good weighting function is available; the probabilistic retrieval model or naive Bayes model might be a good choice if examples of relevant and nonrelevant documents are available; Google’s PageRank model is often used in situations that need modelling of more of less static relations between documents; region models have been designed to search in structured text; and language models are helpful in situations that require models of language similarity or document priors; In this tutorial, I carefully describe all these models by explaining the consequences of modelling assumptions. I address approaches based on statistical language models in great depth. After the course, students are able to choose a model of information retrieval that is adequate in new situations, and to apply the model in practice.

More information at RuSSIR 2009.

Pathinder meeting in Dagstuhl

Monday, February 16th, 2009, posted by Djoerd Hiemstra

Project Meeting Pathfinder

Everyone, please stand on the castle’s axis steps

Photos of DIR 2009 on-line

Thursday, February 5th, 2009, posted by Djoerd Hiemstra

DIR 2009

Excellent photos by Sander Bockting

Dutch-Belgian IR workshop: please smile

Tuesday, April 15th, 2008, posted by Djoerd Hiemstra

Dutch IR researchers

The participants of the Dutch-Belgian Information Retrieval Workshop in Maastricht smile for a team photo: With organiser Ed Hoenkamp left in the middle, and Netherlands most famous IR researcher Keith van Rijsbergen right in the back.

[More info]

Pavel Serdyukov wins ECIR best student paper award

Tuesday, April 1st, 2008, posted by Djoerd Hiemstra

Pavel shows his check

Great news: Yesterday, Pavel Serdyukov won the best student paper award at the European Conference on Information Retrieval (ECIR) in Glasgow for his paper Modeling documents as mixtures of persons for expert finding. The award includes a check of $ 1200 sponsored by Yahoo.

[download pdf]

ECIR tutorial slides on-line

Monday, March 31st, 2008, posted by Djoerd Hiemstra

Djoerd performing at ECIR

I enjoyed giving the advanced language modeling tutorial at the European Conference on Information Retrieval (ECIR). The slides are now availble for download below.

[download pdf]

Ranked XML Querying Seminar

Monday, March 17th, 2008, posted by Djoerd Hiemstra

Participants of the Dagstuhl seminar on Ranked XML Querying

The goal of the Dagstuhl seminar on Ranked XML Querying is to bring together researchers and practitioners from the database (DB), the information retrieval (IR) and the web/applications communities, and create an environment where the distinct communities collaboratively work on understanding the similarities and differences between their various approaches for querying XML data with heterogeneous structure and content, and benefit from each other’s experiences.

The workshop was attended by 27 people from three different research communities: database systems (DB), information retrieval (IR), and Web. The seminar title was interpreted in an IR-style „andish“ sense (it covered also subsets of {Ranking, XML, Querying}, with larger sets being favored) rather than the DB-style strictly conjunctive manner. So in essence, the seminar really addressed the integration of DB and IR technologies with Web 2.0 being an important target area.

[download report]

Welcome to the Database Group

Saturday, February 2nd, 2008, posted by Djoerd Hiemstra

The Database Group

who’s who?