title: Vitality of Neural Networks under Reoccurring Catastrophic Failures.
abstract: Catastrophic failures are complete and sudden collapses in the activity of large networks such as economics, electrical power grids and computer networks, which typically require a manual recovery process. Here we experimentally show that excitatory neural networks are governed by a non-Poissonian reoccurrence of catastrophic failures, where their repetition time follows a multimodal distribution characterized by a few tenths of a second and tens of seconds timescales. The mechanism underlying the termination and reappearance of network activity is quantitatively shown here to be associated with nodal time-dependent features, neuronal plasticity, where hyperactive nodes damage the response capability of their neighbors. It presents a complementary mechanism for the emergence of Poissonian catastrophic failures from damage conductivity. The effect that hyperactive nodes degenerate their neighbors represents a type of local competition which is a common feature in the dynamics of real-world complex networks, whereas their spontaneous recoveries represent a vitality which enhances reliable functionality.
authors.affiliation: Department of Physics, Bar-Ilan University, Ramat-Gan 52900, Israel.
authors.forename: Shira
authors.initials: S
authors.lastname: Sardi
authors.affiliation: Department of Physics, Bar-Ilan University, Ramat-Gan 52900, Israel.
authors.forename: Amir
authors.initials: A
authors.lastname: Goldental
authors.affiliation: Gonda Interdisciplinary Brain Research Center and the Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900, Israel.
authors.forename: Hamutal
authors.initials: H
authors.lastname: Amir
authors.affiliation: Gonda Interdisciplinary Brain Research Center and the Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900, Israel.
authors.forename: Roni
authors.initials: R
authors.lastname: Vardi
authors.affiliation: Department of Physics, Bar-Ilan University, Ramat-Gan 52900, Israel.|Gonda Interdisciplinary Brain Research Center and the Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900, Israel.
authors.forename: Ido
authors.initials: I
authors.lastname: Kanter