Gijs has studied Astronomy at the Kapteyn Astronomical Institute of the Rijksuniversiteit Groningen where he received his M.Sc. degree in 2014. While still having an interest in astronomical subjects he was looking for research with a more practical application. This is how he ended up at the Computer Architecture for Embedded Systems group at the University of Twente where he is currently working on the Ecovat project.
Integer Linear Programming
de Goeijen, G. J. H., Smit, G. J. M., & Hurink, J. L. (2016). An integer linear programming model for an Ecovat buffer. Energies, 9(8), . DOI: 10.3390/en9080592