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- V. C. Latora, Massimo Marchiori
- Physical review letters
- 2001

We introduce the concept of efficiency of a network as a measure of how efficiently it exchanges information. By using this simple measure, small-world networks are seen as systems that are both globally and locally efficient. This gives a clear physical meaning to the concept of "small world," and also a precise quantitative analysis of both weighted and… (More)

The small-world phenomenon has been already the subject of a huge variety of papers, showing its appeareance in a variety of systems. However, some big holes still remain to be filled, as the commonly adopted mathematical formulation is valid only for topological networks. In this paper we propose a generalization of the theory of small worlds based on two… (More)

- Massimo Marchiori
- Computer Networks
- 1997

Finding the right information on the World Wide Web is becoming a fundamental problem, since the amount of global information that the WWW contains is growing at an incredible rate. In this paper, we present a novel method for extracting from a Web object its "hyper" informative content, in contrast with current search engines, which only deal with the… (More)

- Massimo Marchiori
- ALP
- 1996

Conditional rewriting is universally recognized as being much more complicated than unconditional rewriting In this paper we study how much of conditional rewriting can be automatically inferred from the simpler theory of unconditional rewriting We introduce a new tool called unraveling to automatically translate a conditional term rewriting system CTRS… (More)

- Paolo Crucitti, Vito Latora, Massimo Marchiori
- Physical review. E, Statistical, nonlinear, and…
- 2004

Large but rare cascades triggered by small initial shocks are present in most of the infrastructure networks. Here we present a simple model for cascading failures based on the dynamical redistribution of the flow on the network. We show that the breakdown of a single node is sufficient to collapse the efficiency of the entire system if the node is among… (More)

- Santo Fortunato, Vito Latora, Massimo Marchiori
- Physical review. E, Statistical, nonlinear, and…
- 2004

Community structures are an important feature of many social, biological, and technological networks. Here we study a variation on the method for detecting such communities proposed by Girvan and Newman and based on the idea of using centrality measures to define the community boundaries [M. Girvan and M. E. J. Newman, Proc. Natl. Acad. Sci. U.S.A. 99, 7821… (More)

We introduce a new measure of centrality, the information centrality C , based on the concept of efficient propagation of information over the network. C is defined for both valued and non-valued graphs, and applies to groups and classes as well as individuals. The new measure is illustrated and compared to the standard centrality measures by using a… (More)

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… (More)

A new method, based on a recently defined centrality measure, allows to spot the critical components of a generic complex network. The identification and protection of the critical components of a given communication–transportation network should be the first concern in order to reduce the consequences of terrorist attacks. On the other hand, the critical… (More)

- Massimo Marchiori, Janne Saarela
- QL
- 1998

The Resource Description Framework (RDF) Model&Syntax Specification describes a metadata infrastructure which can accommodate classification elements from different vocabularies i.e. schemas. The underlying model consists of a labeled directed acyclic graph which can be linearized into eXtensible Markup Language (XML) transfer syntax for interchange between… (More)