Prof. Shlomo Havlin presented a joint NEST Center and Computer Science colloquium on Cascading Failures and Recovery in Networks of Networks at RPI on December 13, 2018

Prof. Shlomo Havlin of Bar-Ilan University, Ramat-Gan, presented a joint NEST Center and Computer Science colloquium entitled Cascading Failures and Recovery in Networks of Networks at RPI on December 13, 2018. The event was co-organized by Prof. Jianxi Gao and Boleslaw K. Szymanski of NEST and the Department of Computer Science at RPI. The abstract provided by the speaker states that the talk describes a framework for studying the vulnerability and the recovery of networks of interdependent networks and talked about analytical solutions for the critical threshold and the giant component of a network of interdependent networks. The presented general theory has many novel features that are not present in the classical network theory. When recovery of components is possible, global spontaneous recovery of the networks and hysteresis phenomena occur and the theory suggests an optimal repairing strategy for system of systems. The speaker also showed that interdependent networks embedded in space are significantly more vulnerable compared to non-embedded networks. In particular, small localized attacks may lead to cascading failures and catastrophic consequences. Thus, analyzing data of real network of networks is highly required to understand the system vulnerability.