Synchronization is all around us: from thousands of fireflies congregating near trees and lighting up simultaneously to an excited audience taking part in “Mexican waves” during a football match, and the list goes on. In large, complex networks of interconnected systems, an incomplete form of synchronization is also present. Referred to as partial synchronization, it emerges such that systems can be grouped into clusters such that synchrony is only observed in each cluster. For his Ph.D. research, Libo Su has investigated partial synchronization in networks of dynamical systems that are interconnected via time-delay couplings. Su defended his Ph.D. thesis on May 11th at the department of Mechanical Engineering.