EFFECT OF INTENTIONAL REMOVALS OF NODES AS A DEFENSE STRATEGY AGAINST CASCADING FAILURE

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  • カスケード故障に対する意図的ノード除去による防御策の効果

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Cascading failure is a phenomenon where a local failure triggers a global propagation of failures, leading to severe damage to the whole network. It is already shown that even if only a single node is broken, it can lead to catastrophic damage to the whole network. One important question is how we can control cascading failure and mitigate damage. One costless strategy of defense is known as Intentional Removals (IRs). We propose a developed strategy of IRs of nodes which is based on the concept of specifying nodes with low collective-influence and removing them intentionally right after a local failure in order to prevent the propagation of failures. This study shows that even if the tolerance of a network is very low, the damage can be mitigated greatly by carrying out our strategy. Also this study implies that our strategy performs better than the existing strategy.

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