office | MF 4.105 (MetaForum) |

phone | +31 40 247 3067 |

mail address |
Department of Mathematics and Computer Science TU Eindhoven P.O. Box 513 5600MB Eindhoven The Netherlands |

office | MF 4.105 (MetaForum) |

phone | +31 40 247 3067 |

mail address |
Department of Mathematics and Computer Science TU Eindhoven P.O. Box 513 5600MB Eindhoven The Netherlands |

I'm chairing the Algorithms, Geometry, and Applications (ALGA) cluster at the Department of Mathematics and Computer Science of TU Eindhoven.

Algorithms and data structures; discrete and computational geometry; applications of computational geometry to geographic information systems, geo-visualization and visual analytics, and e-Humanities.

*This video (from 2011) is an attempt to explain my research interests to a broader audience ... hover the images below for some more examples.*

A game about building rectangular cartograms.

Click here to play.

Based on: On Rectangular Cartograms*Computational Geometry: Theory and Applications* 37(3), pp. 175-187, 2007.

Click here to play.

Based on: On Rectangular Cartograms

A flow map depicting whisky exports from Scotland.

Click here to see the full map.

Based on: Angle-Restricted Steiner Arborescences for Flow Map Layout*Algorithmica* 72(2), pp. 656-685, 2015.
Flow Map Layout Via Spiral Trees
*IEEE Transactions on Visualization and Computer Graphics* 17(12), pp. 2536-2544, 2011.

Click here to see the full map.

Based on: Angle-Restricted Steiner Arborescences for Flow Map Layout

A representative network for a braided river.

Based on: Computing Representative Networks for Braided Rivers*Proc. 33rd International Symposium on Computational Geometry (SoCG)*, pp. 48:1-48:16, 2017.

Based on: Computing Representative Networks for Braided Rivers

Multi-Granular Trend Detection for Time-Series Analysis
*IEEE Transactions on Visualization and Computer Graphics*, 23(1):661–670, 2017.
Grouping Time-varying Data for Interactive Exploration
*Proc. 32nd Annual Symposium on Computational Geometry (SoCG)*, pp. 61:1–61:16, 2016.

Stable Treemaps via Local Moves
*IEEE Transactions on Visualization and Computer Graphics*, 24(1), 2018.

GlottoVis: Visualizing Language Endangerment and Documentation
*Proc. 2nd Workshop on Visualization for the Digital Humanities (VIS4DH)*, 2017.
Simultaneous Visualization of Language Endangerment and Language Description
*Language Documentation & Conservation*, under review.

From 2010 until 2015 I was a member of The Young Academy (De Jonge Akademie) of the Royal Netherlands Academy of Arts and Sciences (Koninklijke Nederlandse Akademie van Wetenschappen). From 2011 to 2016 I was a member of the Global Young Academy. In 2011 I won the first Netherlands Prize for ICT Research (see here for some more details in Dutch). Part of the prize was a poster which gives a high-level impression of my work and was sent to high schools all over the Netherlands.

Click here to view the poster

34th International Symposium on Computational Geometry (SoCG 2018, Budapest, Hungary)

42nd International Colloquium on Automata, Languages, and Programming - Track A (ICALP 2015, Kyoto, Japan)

Computational Geometry: Young Researchers Forum (YRF 2013, Rio de Janeiro, Brazil)

19th International Symposium on Graph Drawing (GD 2011, Eindhoven, The Netherlands)

I am a member of the Computational Geometry Steering Committee.

I co-organized CG week 2015, which included the 31st International Symposium on Computational Geometry (SoCG 2015), in Eindhoven, June 22-25, 2015.

I co-organized the 19th International Symposium on Graph Drawing (GD 2011) in Eindhoven, September 21-23, 2011.

I co-organized the 21st European Workshop on Computational Geometry (EuroCG 2005) in Eindhoven, March 9-11, 2005.

Before I came to Eindhoven I was a postdoc in the Combinatorics, Geometry and Computation European Graduate Program at ETH Zurich. In Zurich I was a member of the Theory of Combinatorial Algorithms group headed by Emo Welzl. I received my Ph.D. from the University of British Columbia in Vancouver, Canada, where I was supervised by David Kirkpatrick and Jack Snoeyink.