Completed PhD theses

Arjen P. de Vries:

Name	Year	PhD thesis	Notes
Laurens Kuiper	2026	Analytical Query Processing Beyond Main Memory (cum laude)	6
Hideaki Joko	2026	Personalization and Evaluation of Conversational Information Access	5
Chris Kamphuis	2025	Exploring Relations and Graphs for Information Retrieval
Gebre Gebremeskel	2025	Spotlight on Recommender Systems
Thomas Schoegje	2024	Task-based search for municipal knowledge workers	4
Dušan Barok	2024	Publishing as a conservation strategy.	3
Hugo Huurdeman	2018	Supporting the Complex Dynamics of the Information Seeking Process	2
Thaer Samar	2017	Access to and Retrievability of Content in Web Archives
Jeroen Vuurens	2017	Proximity of Terms, Texts and Semantic Vectors in Information Retrieval
Wen Li	2016	Understanding Geo-spatial Information on Social Media
Carsten Eickhoff	2014	Contextual Multidimensional Relevance Models
Samur Araújo	2014	Data Integration over Distributed and Heterogeneous Data Endpoints
Roberto Cornacchia	2012	Querying Sparse Matrices for Information Retrieval
Maarten Clements	2010	Personalised Access to Social Media
Alex van Ballegooij	2009	RAM: Array Database Management through Relational Mapping
Mark van Doorn	2009	End-user Programming of Ambient Narratives for Smart Retail Environments
Jun Wang	2008	Relevance models for collaborative filtering
Georgina Ramirez	2007	Structural Features in XML Retrieval
Thijs Westerveld	2004	Using generative probabilistic models for multimedia retrieval	1

Notes:

1. Co-supervised with Franciska de Jong (UT).
2. Co-supervised with Jaap Kamps (UvA).
3. Co-supervised with Julia Noordegraaf (UvA).
4. Co-supervised with Toine Pieters (UU).
5. Co-supervised with Faegheh Hasibi (RU).
6. Co-supervised with Hannes Muhleisen (RU).

Djoerd Hiemstra:

Name	Year	PhD thesis	Notes
Norman Knyazev	2026	Estimation Methods for Ranking and Recommendation	1
<!–	[Tim de Jonge][pd3]	2026	[][td3]	2	–>

Notes:

1. Co-supervised with Harrie Oosterhuis (UvA).
2. Co-supervised with Frederik Zuiderveen Borgesius (RU).

Only PhD students (co-)supervised by Djoerd Hiemstra while at Radboud University.