Institution
Scuola superiore di Catania
About: Scuola superiore di Catania is a based out in . It is known for research contribution in the topics: Complex network & Graphene. The organization has 103 authors who have published 271 publications receiving 16218 citations.
Papers published on a yearly basis
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TL;DR: This model of the North American power grid using its actual topology and plausible assumptions about the load and overload of transmission substations indicates that the loss of a single substation can result in up to up to 25% loss of transmission efficiency by triggering an overload cascade in the network.
Abstract: The North American power grid is one of the most complex technological
networks, and its interconnectivity allows both for long-distance power
transmission and for the propagation of disturbances. We model the power
grid using its actual topology and plausible assumptions about the load
and overload of transmission substations. Our results indicate that the
loss of a single substation
can result in up to $25\%$
loss of transmission efficiency by triggering
an overload cascade in the network. The actual transmission loss depends
on the overload tolerance of the network and the connectivity of the
failed substation.
We systematically study the damage inflicted by the loss of single nodes,
and find three universal behaviors, suggesting that $40\%$
of the transmission
substations lead to cascading failures when disrupted. While the loss of a single
node can inflict substantial damage, subsequent removals have only incremental effects,
in agreement with the topological resilience to less than $1\%$
node loss.
655 citations
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TL;DR: This paper presents a general framework to describe and study multiplex networks, whose links are either unweighted or weighted, and proposes a series of measures to characterize the multiplexicity of the systems in terms of basic node and link properties.
Abstract: Many real-world complex systems consist of a set of elementary units connected by relationships of different kinds. All such systems are better described in terms of multiplex networks, where the links at each layer represent a different type of interaction between the same set of nodes rather than in terms of (single-layer) networks. In this paper we present a general framework to describe and study multiplex networks, whose links are either unweighted or weighted. In particular, we propose a series of measures to characterize the multiplexicity of the systems in terms of (i) basic node and link properties such as the node degree, and the edge overlap and reinforcement, (ii) local properties such as the clustering coefficient and the transitivity, and (iii) global properties related to the navigability of the multiplex across the different layers. The measures we introduce are validated on a genuinely multiplex data set of Indonesian terrorists, where information among 78 individuals are recorded with respect to mutual trust, common operations, exchanged communications, and business relationships.
610 citations
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TL;DR: The results indicate that a spatial analysis based on a set of four centrality indices allows an extended visualization and characterization of the city structure and has a certain capacity to distinguish different classes of cities.
Abstract: We study centrality in urban street patterns of different world cities represented as networks in geographical space. The results indicate that a spatial analysis based on a set of four centrality indices allows an extended visualization and characterization of the city structure. A hierarchical clustering analysis based on the distributions of centrality has a certain capacity to distinguish different classes of cities. In particular, self-organized cities exhibit scale-free properties similar to those found in nonspatial networks, while planned cities do not.
599 citations
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TL;DR: This work analyzes the structural vulnerability of the Italian GRTN power grid by using a model for cascading failures recently proposed in Crucitti et al. (2004).
Abstract: Large-scale blackouts are an intrinsic drawback of electric power transmission grids. Here we analyze the structural vulnerability of the Italian GRTN power grid by using a model for cascading failures recently proposed in Crucitti et al. (Phys. Rev. E 69 (2004)).
482 citations
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TL;DR: It is found that, at variance with random graphs, scale-free networks display, both on a global and on a local scale, a high degree of error tolerance and an extreme vulnerability to attacks.
Abstract: The concept of network efficiency, recently proposed to characterize the properties of small-world networks, is here used to study the effects of errors and attacks on scale-free networks. Two different kinds of scale-free networks, i.e., networks with power law P(k), are considered: (1) scale-free networks with no local clustering produced by the Barabasi–Albert model and (2) scale-free networks with high clustering properties as in the model by Klemm and Eguiluz, and their properties are compared to the properties of random graphs (exponential graphs). By using as mathematical measures the global and the local efficiency we investigate the effects of errors and attacks both on the global and the local properties of the network. We show that the global efficiency is a better measure than the characteristic path length to describe the response of complex networks to external factors. We find that, at variance with random graphs, scale-free networks display, both on a global and on a local scale, a high degree of error tolerance and an extreme vulnerability to attacks. In fact, the global and the local efficiency are unaffected by the failure of some randomly chosen nodes, though they are extremely sensitive to the removal of the few nodes which play a crucial role in maintaining the network's connectivity.
446 citations
Authors
Showing all 103 results
Name | H-index | Papers | Citations |
---|---|---|---|
Vito Latora | 78 | 332 | 35697 |
Luigi Fortuna | 59 | 664 | 12699 |
Jesús Gómez-Gardeñes | 56 | 172 | 12883 |
Francesco Priolo | 51 | 342 | 12692 |
Marco Pavone | 49 | 378 | 8487 |
Daniele F. Condorelli | 45 | 171 | 6091 |
Filippo Giannazzo | 42 | 343 | 5878 |
M. De Domenico | 42 | 80 | 6765 |
Mattia Frasca | 38 | 365 | 5812 |
Vincenzo Nicosia | 36 | 128 | 5937 |
Bruno Pignataro | 34 | 134 | 3664 |
Salvatore Scellato | 33 | 58 | 6587 |
Manlio De Domenico | 30 | 93 | 5074 |
Francesco Saverio Cataliotti | 30 | 139 | 3687 |
Filippo Caruso | 30 | 111 | 4006 |