adjacent possible air traffic complex network complexity complex_networks complex_systems creativity cuskley data_compression dynamical_systems evolutionary_dynamics gravino information_theory innovation_dynamics kreyon language_dynamics language_games local optimization loreto monechi opinion_dynamics phylogeny relevant_literature servedio social_dynamics statistical_physics techno_social_systems tria XTribe zippers
2009 |
Capocci, Andrea; Baldassarri, Andrea; Servedio, Vito; Loreto, Vittorio Statistical properties of inter-arrival times distribution in social tagging systems (Inproceeding) Proceeding HT '09 Proceedings of the 20th ACM conference on Hypertext and hypermedia, 2009. (Links | BibTeX | Tags: loreto, servedio, statistical_physics, techno_social_systems) @inproceedings{b, title = {Statistical properties of inter-arrival times distribution in social tagging systems}, author = {Andrea Capocci and Andrea Baldassarri and Vito D.P. Servedio and Vittorio Loreto}, url = {http://dl.acm.org/citation.cfm?doid=1557914.1557955 http://www.scopus.com/inward/record.url?eid=2-s2.0-70450189061&partnerID=65&md5=b3856af34776847bb54edf90426aae20 ttp://www.tagora-project.eu/wp-content/2009/09/p239-capocci.pdf}, year = {2009}, date = {2009-01-01}, booktitle = {Proceeding HT '09 Proceedings of the 20th ACM conference on Hypertext and hypermedia}, keywords = {loreto, servedio, statistical_physics, techno_social_systems}, pubstate = {published}, tppubtype = {inproceedings} } |
2008 |
Loreto, Vittorio; Pietronero, Luciano; Zapperi, Stefano Editorial (Journal Article) THE EUROPEAN PHYSICAL JOURNAL. B, CONDENSED MATTER PHYSICS, 64(3-4) , pp. 301–305, 2008. (Links | BibTeX | Tags: loreto, statistical_physics) @article{b, title = {Editorial}, author = {Vittorio Loreto and Luciano Pietronero and Stefano Zapperi}, url = {http://link.springer.com/content/pdf/10.1140%2Fepjb%2Fe2008-00319-2.pdf, http://www.scopus.com/inward/record.url?eid=2-s2.0-53149153877&partnerID=65&md5=2e0f94184809a0100dc4f96bc3781099, http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=000259677600001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=0c7ff228ccbaaa74236f48834a34396a}, year = {2008}, date = {2008-01-01}, journal = {THE EUROPEAN PHYSICAL JOURNAL. B, CONDENSED MATTER PHYSICS}, volume = {64(3-4)}, pages = {301--305}, keywords = {loreto, statistical_physics}, pubstate = {published}, tppubtype = {article} } |
Petri, Alberto; Berganza, Miguel Ibagnez De; Loreto, Vittorio Ordering dynamics in the presence of multiple phases (Journal Article) PHILOSOPHICAL MAGAZINE, 88 , pp. 3931–3938, 2008. (Links | BibTeX | Tags: loreto, statistical_physics) @article{b, title = {Ordering dynamics in the presence of multiple phases}, author = {Alberto Petri and Miguel Ibagnez De Berganza and Vittorio Loreto}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-58049188531&partnerID=65&md5=d7eaf074195387c3718086ed333c5a16, http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=000261804100008&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=0c7ff228ccbaaa74236f48834a34396a}, year = {2008}, date = {2008-01-01}, journal = {PHILOSOPHICAL MAGAZINE}, volume = {88}, pages = {3931--3938}, publisher = {Taylor & Francis Limited}, keywords = {loreto, statistical_physics}, pubstate = {published}, tppubtype = {article} } |
Toris, Patrizia; Rubeis, Valerio De; Loreto, Vittorio; Pietronero, Luciano Space-time correlations of earthquakes (Journal Article) GEOPHYSICAL JOURNAL INTERNATIONAL, 173(3) , pp. 932–941, 2008. (Abstract | Links | BibTeX | Tags: loreto, statistical_physics) @article{b, title = {Space-time correlations of earthquakes}, author = {Patrizia Toris and Valerio De Rubeis and Vittorio Loreto and Luciano Pietronero}, url = {http://gji.oxfordjournals.org/content/173/3/932, http://www.scopus.com/inward/record.url?eid=2-s2.0-43449129493&partnerID=65&md5=781012778cff79bd9d3baf409098ca71, http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=000255708100014&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=0c7ff228ccbaaa74236f48834a34396a}, year = {2008}, date = {2008-01-01}, journal = {GEOPHYSICAL JOURNAL INTERNATIONAL}, volume = {173(3)}, pages = {932--941}, publisher = {Blackwell Science Limited}, abstract = {Seismicity is a complex process featuring non-trivial space-time correlations in which several forms of scale invariance have been identified. A frequently used method to detect scale-invariant features is the correlation integral, which leads to the definition of a correlation dimension separately in space and time. In this paper, we generalize this method with the definition of a space-time combined correlation integral. This approach allows us to analyse medium-strong seismicity as a point process, without any distinction among main, after or background shocks. The analyses performed on the catalogue of worldwide seismicity and the corresponding reshuffled version strongly suggest that earthquakes of medium-large magnitude are time clustered inside specific space-time regions. On the basis of this feature, we recognize a space-time domain statistically characterized by sequences' behaviour and a domain of temporal randomness. Then, focusing on the spatial distribution of hypocentres, we find another domain confined to short distances and characterized by a relatively high degree of spatial correlation. This spatial domain slowly increases with time: we interpret this as the 'afterevent' zone representing the set of all subsequent events located very near (about 30 km) to each reference earthquake and embedded on specific seismogenic structures such as faults planes.}, keywords = {loreto, statistical_physics}, pubstate = {published}, tppubtype = {article} } Seismicity is a complex process featuring non-trivial space-time correlations in which several forms of scale invariance have been identified. A frequently used method to detect scale-invariant features is the correlation integral, which leads to the definition of a correlation dimension separately in space and time. In this paper, we generalize this method with the definition of a space-time combined correlation integral. This approach allows us to analyse medium-strong seismicity as a point process, without any distinction among main, after or background shocks. The analyses performed on the catalogue of worldwide seismicity and the corresponding reshuffled version strongly suggest that earthquakes of medium-large magnitude are time clustered inside specific space-time regions. On the basis of this feature, we recognize a space-time domain statistically characterized by sequences' behaviour and a domain of temporal randomness. Then, focusing on the spatial distribution of hypocentres, we find another domain confined to short distances and characterized by a relatively high degree of spatial correlation. This spatial domain slowly increases with time: we interpret this as the 'afterevent' zone representing the set of all subsequent events located very near (about 30 km) to each reference earthquake and embedded on specific seismogenic structures such as faults planes. |
2007 |
Berganza, Miguel Ibanez De; Loreto, Vittorio; Petri, Alberto Dinamic metastability in the two-dimensional Potts model (Journal Article) arXiv/0706.3534 , pp. 1–7, 2007. (BibTeX | Tags: loreto, statistical_physics) @article{b, title = {Dinamic metastability in the two-dimensional Potts model}, author = {Miguel Ibanez De Berganza and Vittorio Loreto and Alberto Petri}, year = {2007}, date = {2007-01-01}, volume = {arXiv/0706.3534}, pages = {1--7}, publisher = {arXiv (United States)}, keywords = {loreto, statistical_physics}, pubstate = {published}, tppubtype = {article} } |
Berganza, Miguel Ibanez De; Loreto, Vittorio; Petri, Alberto Phase ordering and symmetries of the Potts model (Journal Article) PHILOSOPHICAL MAGAZINE, 87 , pp. 779–786, 2007. (Links | BibTeX | Tags: loreto, statistical_physics) @article{b, title = {Phase ordering and symmetries of the Potts model}, author = {Miguel Ibanez De Berganza and Vittorio Loreto and Alberto Petri}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-33847096319&partnerID=65&md5=959ab3c3ff23950fcebf747fd38acaee, http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=000244150900050&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=0c7ff228ccbaaa74236f48834a34396a}, year = {2007}, date = {2007-01-01}, journal = {PHILOSOPHICAL MAGAZINE}, volume = {87}, pages = {779--786}, publisher = {Taylor & Francis Limited:Rankine Road, Basingstoke RG24 8PR United Kingdom:011 44 1256 813035, EMAIL: madeline.sims@tandf.co.uk, info@tandf.co.uk, INTERNET: http://www.tandf.co.uk, Fax: 011 44 1256 330245}, keywords = {loreto, statistical_physics}, pubstate = {published}, tppubtype = {article} } |
Berganza, Miguel Ibanez De; Ferrero, Ezequiel; Cannas, Sergio; Loreto, Vittorio; Petri, Alberto Phase separation of the Potts model in the square lattice (Journal Article) THE EUROPEAN PHYSICAL JOURNAL. SPECIAL TOPICS, 143 , pp. 273–275, 2007. (Links | BibTeX | Tags: loreto, statistical_physics) @article{b, title = {Phase separation of the Potts model in the square lattice}, author = {Miguel Ibanez De Berganza and Ezequiel E. Ferrero and Sergio Cannas and Vittorio Loreto and Alberto Petri}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-34249051014&partnerID=65&md5=5e27afa20cc7096a910b74547cb0b2d9, http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=000246985800041&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=0c7ff228ccbaaa74236f48834a34396a}, year = {2007}, date = {2007-01-01}, journal = {THE EUROPEAN PHYSICAL JOURNAL. SPECIAL TOPICS}, volume = {143}, pages = {273--275}, publisher = {EDP Sciences, Società Italiana di Fisica and Springer Berlin Heidelberg.}, keywords = {loreto, statistical_physics}, pubstate = {published}, tppubtype = {article} } |
2006 |
Taloni, Alessandro; Cagliori, Emanuele; Loreto, Vittorio; Pietronero, Luciano Conformal approach to cylindrical DLA (Journal Article) JOURNAL OF STATISTICAL MECHANICS: THEORY AND EXPERIMENT, Art. n. P09004 , 2006. (Abstract | Links | BibTeX | Tags: loreto, statistical_physics) @article{b, title = {Conformal approach to cylindrical DLA}, author = {Alessandro Taloni and Emanuele Cagliori and Vittorio Loreto and Luciano Pietronero}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-37649026579&partnerID=65&md5=18e07a1e17966902ff4a2c6e9b9dadfc, http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=000241413300004&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=0c7ff228ccbaaa74236f48834a34396a}, year = {2006}, date = {2006-01-01}, journal = {JOURNAL OF STATISTICAL MECHANICS: THEORY AND EXPERIMENT}, volume = {Art. n. P09004}, abstract = {We extend the conformal mapping approach elaborated for the radial diffusion limited aggregation model (DLA) to cylindrical geometry. We introduce in particular a complex function which allows a cylindrical cluster to be grown using as an intermediate step a radial aggregate. The aggregate grown exhibits the same self-affine features as the original cylindrical DLA. The specific choice of the transformation allows us to study the relationship between the radial and the cylindrical geometry. In particular the cylindrical aggregate can be seen as a radial aggregate with particles of size increasing with the radius. On the other hand, the radial aggregate can be seen as a cylindrical aggregate with particles of size decreasing with the height. This framework, which shifts the point of view from the geometry to the size of the particles, can open the way to more quantitative studies on the relationship between radial and cylindrical DLA.}, keywords = {loreto, statistical_physics}, pubstate = {published}, tppubtype = {article} } We extend the conformal mapping approach elaborated for the radial diffusion limited aggregation model (DLA) to cylindrical geometry. We introduce in particular a complex function which allows a cylindrical cluster to be grown using as an intermediate step a radial aggregate. The aggregate grown exhibits the same self-affine features as the original cylindrical DLA. The specific choice of the transformation allows us to study the relationship between the radial and the cylindrical geometry. In particular the cylindrical aggregate can be seen as a radial aggregate with particles of size increasing with the radius. On the other hand, the radial aggregate can be seen as a cylindrical aggregate with particles of size decreasing with the height. This framework, which shifts the point of view from the geometry to the size of the particles, can open the way to more quantitative studies on the relationship between radial and cylindrical DLA. |
2005 |
Castellano, Claudio; Loreto, Vittorio; Barrat, Alain; Cecconi, Federico; Parisi, Domenico Comparison of voter and Glauber ordering dynamics on networks (Journal Article) PHYSICAL REVIEW E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS, 71 , pp. 066107–066114, 2005. (Links | BibTeX | Tags: loreto, opinion_dynamics, social_dynamics, statistical_physics) @article{b, title = {Comparison of voter and Glauber ordering dynamics on networks}, author = {Claudio Castellano and Vittorio Loreto and Alain Barrat and Federico Cecconi and Domenico Parisi}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-27944464161&partnerID=65&md5=e33dbf7e41cab953b8225aab3fc4c019, http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=000230275000023&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=0c7ff228ccbaaa74236f48834a34396a}, year = {2005}, date = {2005-01-01}, journal = {PHYSICAL REVIEW E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS}, volume = {71}, pages = {066107--066114}, publisher = {AMERICAN PHYSICAL SOC, ONE PHYSICS ELLIPSE, COLLEGE PK, USA, MD, 20740-3844}, keywords = {loreto, opinion_dynamics, social_dynamics, statistical_physics}, pubstate = {published}, tppubtype = {article} } |
2003 |
Falcon, Massimo; Loreto, Vittorio; Vulpiani, Angelo Entropie, Chaos et Complexite (Incollection) A.VULPIANI, R.LIVI ET (Ed.): L'heritage de Kolmogorov en physique, pp. 96–119, Belin, PARIS, 2003. (BibTeX | Tags: complexity, loreto, statistical_physics) @incollection{b, title = {Entropie, Chaos et Complexite}, author = {Massimo Falcon and Vittorio Loreto and Angelo Vulpiani}, editor = {R.LIVI ET A.VULPIANI}, year = {2003}, date = {2003-01-01}, booktitle = {L'heritage de Kolmogorov en physique}, pages = {96--119}, publisher = {Belin}, address = {PARIS}, keywords = {complexity, loreto, statistical_physics}, pubstate = {published}, tppubtype = {incollection} } |
Falcon, Massimo; Loreto, Vittorio; Vulpiani, Angelo Kolmogorov's Legacy about Entropy, Chaos and Complexity (Incollection) VULPIANI, LIVI; (Ed.): The Kolmogorov Legacy in Physics, LPN 636 , pp. 85–108, Springer-Verlag, BERLIN, 2003. (BibTeX | Tags: complexity, loreto, statistical_physics) @incollection{b, title = {Kolmogorov's Legacy about Entropy, Chaos and Complexity}, author = {Massimo Falcon and Vittorio Loreto and Angelo Vulpiani}, editor = {R. LIVI; A. VULPIANI}, year = {2003}, date = {2003-01-01}, booktitle = {The Kolmogorov Legacy in Physics}, volume = {LPN 636}, pages = {85--108}, publisher = {Springer-Verlag}, address = {BERLIN}, keywords = {complexity, loreto, statistical_physics}, pubstate = {published}, tppubtype = {incollection} } |
1996 |
Loreto, Vittorio; Paladin, Giovanni; Vulpiani, Angelo Concept of complexity in random dynamical systems (Journal Article) PHYSICAL REVIEW E, 53 , pp. 2087–2098, 1996. (Abstract | Links | BibTeX | Tags: complexity, dynamical_systems, loreto, statistical_physics) @article{b, title = {Concept of complexity in random dynamical systems}, author = {Vittorio Loreto and Giovanni Paladin and Angelo Vulpiani}, url = {http://pre.aps.org/abstract/PRE/v53/i3/p2087_1 http://samarcanda.phys.uniroma1.it/vittorioloreto/PAPERS/1996/Loreto_PhysRevE_1996.pdf}, year = {1996}, date = {1996-01-01}, journal = {PHYSICAL REVIEW E}, volume = {53}, pages = {2087--2098}, publisher = {AMERICAN PHYSICAL SOC}, abstract = {We introduce a measure of complexity in terms of the average number of bits per time unit necessary to specify the sequence generated by the system. In dynamical systems with small random perturbations, this indicator coincides with the rate K of divergence of nearby trajectories evolving under two different noise realizations. The meaning of K is discussed in the context of the information theory, and it is shown that it can be determined from real experimental data. In the presence of strong dynamical intermittency, the value of K is very different from the standard Lyapunov exponent lambda(sigma) computed considering two nearby trajectories evolving under the same realization of the randomness. However, the former is much more relevant than the latter from a physical point of view, as illustrated by some numerical computations for noisy maps and sandpile models.}, keywords = {complexity, dynamical_systems, loreto, statistical_physics}, pubstate = {published}, tppubtype = {article} } We introduce a measure of complexity in terms of the average number of bits per time unit necessary to specify the sequence generated by the system. In dynamical systems with small random perturbations, this indicator coincides with the rate K of divergence of nearby trajectories evolving under two different noise realizations. The meaning of K is discussed in the context of the information theory, and it is shown that it can be determined from real experimental data. In the presence of strong dynamical intermittency, the value of K is very different from the standard Lyapunov exponent lambda(sigma) computed considering two nearby trajectories evolving under the same realization of the randomness. However, the former is much more relevant than the latter from a physical point of view, as illustrated by some numerical computations for noisy maps and sandpile models. |