Featured at CHI 2023
Featured on Dutch Design Week 22
Featured on the Dutch Kings Day
Featured on SBS 6 (dutch television)

Understanding climate change is not just about the rise of CO2 Emissions but also mitigation. To explain the underlying mechanisms, we investigate novel concepts to enhance the understanding of those. One example is the key of the future.
The key, which has a physical and a blockchain component, is composed of several cubes: each cube represents a municipality in Limburg. The size represents the amount of renewable energy per inhabitant in the present, and a small orange cube inside indicates the amount ten years ago. In this period, the share of renewable energy has grown by almost 700%, and it was initially so small that it could hardly be represented with an orange cube.

The object is thus a data-driven symbol that we should not see the world as it was, but how much more beautiful and sustainable it can become.

This site is currently under constrution and will be updated soon.

Featured at Human Computer Interaction International 2022
Featured at Pleasure, Arts and Sciences Festival Maastricht
Exhibition "Touching Abstraction" Brightlands Smart Services Campus 2020

The increasing amount of interconnected data has given rise to a need among researchers and practitioners to develop new approaches to the visualization of network structures. The intricacy of such structures vastly exceeds the capacity of most conventional approaches to network visualization in terms of dimensional and resolution restrictions as they are mostly presented two-dimensional with limited screensize. An additional limition of traditional network visualization tools from a human-computer interaction standpoint is the limited interaction itself where immersion and ‘deep-diving’ into high-dimensional data is not possible. We built NetImmerse, an application to visualize network data in a virtual environment with the ability to overview, zoom, and request details on-demand. Within the virtual space, users have the possibility to either walk around the 3D data representation or rotate and move the representation using the two controllers. We tested the application with users and simulated a representative use case. NetImmerse enabled the participants to gain accurate insights based on the defined task. Participants indicated a PU of 5.25 and a PEOU of 5.46. We believe that NetImmerse is an engaging platform for multi-dimensional data exploration and may result in better insights and enhance the ability of network data exploration.

Featured at ACM Creativity and Cognition 2023
Fearured at Human Computer Interaction international 2022

After spending a lot of time in video conferences due to the COVID-19 pandemic, I began to ponder whether interactive and voice-controlled visual feedback systems could help people engage in more productive and balanced conversations. The underlying idea is to provide users with direct feedback on their speaking time through effective information design, indicating if they are speaking too much or too little. The primary challenge in this regard is achieving high visualization efficiency since online meetings already involve cognitively complex processes even without additional visualization applications.

Featured at CHI 2020 (Honolulu)
Featured at Dutch CHI 2020
Featured at German CHI 2020
Featured at a special Issue of the Observant
Featured at the Exhibition "Touching Abstraction" at BSSC
Pension Fund Achievement of the Year 2019 - APG GroeiFabriek

With the advent of mixed reality devices such as the Microsoft HoloLens, developers have been faced with the challenge to utilize the third dimension in information visualization effectively. Research on stereoscopic devices has shown that three-dimensional representation can improve accuracy in specific tasks (e.g., network visualization). Yet, so far the field has remained mute on the underlying mechanism. Our study systematically investigates the differences in user perception between a regular monitor and a mixed reality device. In a real-life within-subject experiment in the field with twenty-eight investment bankers, we assessed subjective and objective task performance with two- and three-dimensional systems, respectively. We tested accuracy with regard to position, size, and color using single and combined tasks.
eplaced{Our results do not show a significant difference in accuracy between mixed-reality and standard 2D monitor visualizations.}{Our results indicate that mixed reality devices do not perform significantly less accurate than standard 2D monitor visualizations.

Featured at Spiegel Online
Featured at AR 5 (Weltklimabericht)
Features at IPCC SRREN (Special Report on Renewable Energy)

In the last 15 years, I have systematically examined the design space to explore how information visualization and algorithms can be used to bridge complex societal issues, decision-makers, and society as a whole. For the Intergovernmental Panel on Climate Change (IPCC), I have developed the style guides for the world climate reports, as well as the associated guidelines for visualizing climate data, complex concepts, and data types. The particular challenges of this task lay in both the multitude of illustrations and technical data, as well as the political guidelines that arise within an international body like the IPCC. The visualization concepts not only had to meticulously meet all technical requirements but also needed to be politically neutral, intuitively unbiased, and allow for as little room for interpretation as possible.

For the IPCC, I have led the way on two reports. I have developed over 1000 visualizations that were published by Cambridge Press, Spiegel Online, Nature Climate Change, Environmental Science and Policy, and other relevant contexts.