Greedy control of cascading failures in interdependent networks

Abstract Complex systems are challenging to control because the system responds to the controller in a nonlinear fashion, often incorporating feedback mechanisms. Interdependence of systems poses additional difficulties, as cross-system connections enable malicious activity to spread between layers,...

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Autores principales:	Malgorzata Turalska, Ananthram Swami
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/86b6c71518eb4673b02bea0a70de3fd7
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spelling	oai:doaj.org-article:86b6c71518eb4673b02bea0a70de3fd72021-12-02T14:26:48ZGreedy control of cascading failures in interdependent networks10.1038/s41598-021-82843-82045-2322https://doaj.org/article/86b6c71518eb4673b02bea0a70de3fd72021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-82843-8https://doaj.org/toc/2045-2322Abstract Complex systems are challenging to control because the system responds to the controller in a nonlinear fashion, often incorporating feedback mechanisms. Interdependence of systems poses additional difficulties, as cross-system connections enable malicious activity to spread between layers, increasing systemic risk. In this paper we explore the conditions for an optimal control of cascading failures in a system of interdependent networks. Specifically, we study the Bak–Tang–Wiesenfeld sandpile model incorporating a control mechanism, which affects the frequency of cascades occurring in individual layers. This modification allows us to explore sandpile-like dynamics near the critical state, with supercritical region corresponding to infrequent large cascades and subcritical zone being characterized by frequent small avalanches. Topological coupling between networks introduces dependence of control settings adopted in respective layers, causing the control strategy of a given layer to be influenced by choices made in other connected networks. We find that the optimal control strategy for a layer operating in a supercritical regime is to be coupled to a layer operating in a subcritical zone, since such condition corresponds to reduced probability of inflicted avalanches. However this condition describes a parasitic relation, in which only one layer benefits. Second optimal configuration is a mutualistic one, where both layers adopt the same control strategy. Our results provide valuable insights into dynamics of cascading failures and and its control in interdependent complex systems.Malgorzata TuralskaAnanthram SwamiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Malgorzata Turalska Ananthram Swami Greedy control of cascading failures in interdependent networks
description	Abstract Complex systems are challenging to control because the system responds to the controller in a nonlinear fashion, often incorporating feedback mechanisms. Interdependence of systems poses additional difficulties, as cross-system connections enable malicious activity to spread between layers, increasing systemic risk. In this paper we explore the conditions for an optimal control of cascading failures in a system of interdependent networks. Specifically, we study the Bak–Tang–Wiesenfeld sandpile model incorporating a control mechanism, which affects the frequency of cascades occurring in individual layers. This modification allows us to explore sandpile-like dynamics near the critical state, with supercritical region corresponding to infrequent large cascades and subcritical zone being characterized by frequent small avalanches. Topological coupling between networks introduces dependence of control settings adopted in respective layers, causing the control strategy of a given layer to be influenced by choices made in other connected networks. We find that the optimal control strategy for a layer operating in a supercritical regime is to be coupled to a layer operating in a subcritical zone, since such condition corresponds to reduced probability of inflicted avalanches. However this condition describes a parasitic relation, in which only one layer benefits. Second optimal configuration is a mutualistic one, where both layers adopt the same control strategy. Our results provide valuable insights into dynamics of cascading failures and and its control in interdependent complex systems.
format	article
author	Malgorzata Turalska Ananthram Swami
author_facet	Malgorzata Turalska Ananthram Swami
author_sort	Malgorzata Turalska
title	Greedy control of cascading failures in interdependent networks
title_short	Greedy control of cascading failures in interdependent networks
title_full	Greedy control of cascading failures in interdependent networks
title_fullStr	Greedy control of cascading failures in interdependent networks
title_full_unstemmed	Greedy control of cascading failures in interdependent networks
title_sort	greedy control of cascading failures in interdependent networks
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/86b6c71518eb4673b02bea0a70de3fd7
work_keys_str_mv	AT malgorzataturalska greedycontrolofcascadingfailuresininterdependentnetworks AT ananthramswami greedycontrolofcascadingfailuresininterdependentnetworks
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Greedy control of cascading failures in interdependent networks

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