Gerrit Heuvelman has received his PhD
Party on Gerrit! Excellent work my friend! Gerrit's colleagues came up with an impressive multifunctional "Doktorhut" that really challenges those of the previous ones from the international PhD student quartet consisting of Gerrit, Felix, Jacek and Thibaud. Here you can see movie 1, movie 2 and movie 3 of Gerrit's hat in action.