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Dr. Claudio Castellano Istituto dei Sistemi Complessi, (ISC-CNR) and Dipartimento di Fisica, "Sapienza" Universita' di Roma Mailing address: Claudio Castellano Istituto dei Sistemi Complessi (ISC-CNR) Via dei Taurini 19, 00185 Roma, Italy Tel: +39 06 4993 7511 Fax: +39 06 4993 7440 
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I am a research scientist at the Istituto dei Sistemi Complessi (Institute of Complex Systems, ISC-CNR), part of CNR, the National Research council of Italy.
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Recent papers
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Models for epidemics on complex networks may have different mechanisms
triggering the transition into the active state, involving either
the vertex with the largest degree (hub) or collectively the set of
nodes located at the innermost, dense core of the network (max k-core).
C. Castellano and R. Pastor-Satorras
Competing activation mechanisms in epidemics on networks`
Submitted (2011). [arXiv:1105.5545]
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The Sznajd model for opinion dynamics has been
claimed to be qualitatively different because information "flows out".
We exhibit models for which the information flow is of the usual type
("inflow") and that give results indistinguishable from those of Sznajd.
Hence the direction of the information flow is not relevant.
C. Castellano and R. Pastor-Satorras
Irrelevance of information outflow in opinion dynamics models
Phys. Rev. E, 83, 016113 (2011). [arXiv:1012.2003]
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The effect of network topology on the SIS epidemic threshold is much
stronger than what is predicted by heterogeneous mean-field theory: the
threshold vanishes also for scale-rich networks.
C. Castellano and R. Pastor-Satorras
Thresholds for epidemic spreading in networks
Phys. Rev. Lett., 105, 218701 (2010). [arXiv:1010.1646]
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Quenched site or purely topological disorder may induce rare-region
effects with slow dynamics and generic power-law decays for
dynamics on networks.
M. A. Munoz, R. Juhasz, G. Odor and C. Castellano
Griffiths phases on complex networks
Phys. Rev. Lett., 105, 128701 (2010). [arXiv:1009.0395]