FIŠ ima 5. doktorja znanosti!
V petek, 15. 3. 2019, je Marc Grau Leguia uspešno zagovarjal doktorsko disertacijo z naslovom Automatic reconstruction of complex dynamical networks ter tako pridobil naziv Doktor znanosti s področja informacijske družbe.
Komisijo na zagovoru so sestavljali:
− prof. dr. Ljupčo Todorovski, predsednik komisije (UL, FU),
− izr. prof. dr. Zoran Levnajić, mentor (FIŠ),
− prof. dr. Ralph Gregor Andrzejak, mentor (Pompeu Fabra University, Spain),
− doc. dr. Bernard Ženko, somentor (IJS),
− doc. dr. Bilijana Mileva Boshkoska, članica komisije (FIŠ)
Povzetek doktorske disertacije:
A foremost problem in network science is how to reconstruct (infer) the topology of a real network from signals measured from its internal units. Grasping the architecture of complex networks is key, not only to understand their functioning, but also to predict and control their behaviour. Currently available methods largely focus on the detection of links of undirected networks and often require strong assumptions about the system. However, many of these methods cannot be applied to networks with directional connections. To address this problem, in this doctoral work we focus at the inference of directed networks. Specifically, we develop a model-based network reconstruction method that combines statistics of derivative-variable correlations with simulated annealing. We furthermore develop a data-driven reconstruction method based on a nonlinear interdependence measure. This method allows one to infer the topology of directed networks of chaotic Lorenz oscillators for a subrange of the coupling strength and link density. Finally, we apply the data-driven method to multichannel electroencephalographic recordings from an epilepsy patient. The functional brain networks obtained from this approach are consistent with the available medical information.