Mr. Iason Chrysomallis, a PhD student supervised by Prof. Georgios Chalkiadakis, contributor to TrafficFluid, accomplished successfully his PhD thesis defense on 2 December 2025. The jury comprised 2 external members (Prof. Alberto Castellini - University of Verona, Prof. George Vouros - University of Piraeus), as well as Profs. George Chalkiadakis, Ioannis Papamichail, Michail Lagoudakis, Markos Papageorgiou, and Thrasyvoulos Spyropoulos. The PhD thesis is entitled "Deep implicit imitation reinforcement learning". We congratulate Dr. Chrysomallis on this achievement!