Team Klaus Ostermann head Bettina Kappler administration David Binder researcher Steven Lolong researcher Marius Müller researcher Marco Tzschentke researcher Alumni Jonathan Brachthäuser Yufei Cai Theo Doukas Paolo Giarrusso Birgit Grieg Matthias Hirzel Julian Jabs Luzia Leifheit Aron Müller Tillmann Rendel Philipp Schuster Ingo Skupin Julia Trieflinger