Julian

Julian Hatzky CI-Group x IDE+A

I am a PhD student privileged to be supervised by Anil Yaman, Guszti Eiben, and Thomas Bartz-Beielstein.
My research interests center around efficient deep learning and representation learning, motivated by the question:
"What drives the emergence of intelligence?"

Alongside my PhD, I work as a Technical Lead at Prognos AG.

Previously, during my Master’s degree in Artificial Intelligence at VU Amsterdam, I worked with Peter Bloem on geometric deep learning and equivariant neural networks. For my Bachelor’s thesis in Computer Science at TH Köln, I contributed to the development of an open-source framework for quantum computing together with Elisabeth Lobe, Tobias Stollenwerk, and Beate Rhein, in collaboration with the German Aerospace Center (DLR).

selected publications

A Multi-brain Approach for Multiple Tasks in Evolvable Robots

Ege de Bruin, Julian Hatzky, Babak Hosseinkhani Kargar, and A. E. Eiben

In Applications of Evolutionary Computation, 2023

Abs PAPER Bib Website

We investigate the joint evolution of morphologies (bodies) and controllers (brains) of modular robots for multiple tasks. In particular, we want to validate an approach based on three premises. First, the controller is a combination of a user-defined decision tree and evolvable/learnable modules, one module for each given task. Second, morphologies and controllers are evolved jointly for each task simultaneously by a multi-objective evolutionary algorithm. Third, after terminating the evolutionary process, the brain of the users’ favorite morphology is optimized by a learning algorithm applied to the task-specific controller modules independently.
@inproceedings{10.1007/978-3-031-30229-9_9, author = {{de Bruin}, Ege and Hatzky, Julian and Hosseinkhani Kargar, Babak and Eiben, A. E.}, editor = {Correia, Jo{\~a}o and Smith, Stephen and Qaddoura, Raneem}, title = {A Multi-brain Approach for Multiple Tasks in Evolvable Robots}, booktitle = {Applications of Evolutionary Computation}, year = {2023}, publisher = {Springer Nature Switzerland}, address = {Cham}, pages = {129--144}, isbn = {978-3-031-30229-9}, }

latest posts

Mar 25, 2025	Tanh Function as Drop-In Replacement for Layernorm
Jan 10, 2024	Towards Group Equivariant Self-Attention
Jan 09, 2024	Group Equivariant Self-Attention