Archive for » January, 2011 «

Monday, January 24th, 2011 | Author:

I have a vacancy for a PhD position in a project called “Pay-As-You-Go Data Integration for Bio-Informatics” (PayDIBI). In short, the objective is to develop data coupling and integration technology to support bio-informatics scientists in quickly constructing targeted data sets for researching questions that require the combination of information from more than one biological database. More information and a webform to apply can be found here.

Thursday, January 20th, 2011 | Author:

De studie Bedrijfsinformatietechnologie (BIT) aan de Universiteit Twente wordt door de Keuzegids Hoger Onderwijs Universiteiten 2011 een “echte hoogvlieger” genoemd. In een vergelijk tussen alle “Informatiekunde” studies in Nederland, krijgt BIT een totaalscore van 82, met kop en schouders boven de nummer 2, Informatiekunde in Groningen met 74 punten. Zie artikel in de weekkrant.
Ik heb een sterke band met BIT: Ik zit in de opleidingscommissie voor BIT die adviseert over het studieprogramma en andere zaken; bovendien ben ik actief in de voorlichting over BIT; en ik doceer BIT-vakken en begeleid BIT-studenten.

Category: 5. Teaching, 6. Organization  | Tags: , ,  | Comments off
Friday, January 07th, 2011 | Author:

On 7 January 2011, Eelco Eerenberg defended his MSc thesis “Towards Distributed Information Retrieval based on Economic Models”. The MSc project was supervised by Djoerd Hiemstra, Kien Tjin-Kam-Jet, and me.
“Towards Distributed Information Retrieval based on Economic Models”[download]
The aim of this research is to build a successful distributed information retrieval system based on an economic model, allowing servers to open up their part of the deep web. This research consists of three parts: 1) selecting suitable economic models, 2) simulating these models, and 3) performing a real-world test. We found the models of Vickrey auction and bond redistribution to be the most suitable ones. These models behaved well in our simulation and both outperformed a naive comparison model. The Vickrey auction model performed best in a scenario that mostly resembles the Internet. On average 69% of all models with a strong correlation between the economic outcomes and the performance of information retrieval (Kendall’s-τ > 0.6) is a Vickrey auction model. In the real-world test we show that users appreciate both the use and administration of an information retrieval system based on an economic model. Furthermore, if we apply a perfect categorization, the economic model outperforms the comparison engine with a 66% increase in performance.