Ciro Cattuto

Publication Activity (10 Years)

Years Active: 2006-2024
Publications (10 Years): 39

Top Topics

Computer Scientists

Top Venues

PLoS Comput. Biol.

Frontiers Big Data

Publications

Lorenzo Dall'Amico, Alain Barrat, Ciro Cattuto
An embedding-based distance for temporal graphs. CoRR (2024)
Daniele Sartirano, Kyriaki Kalimeri, Ciro Cattuto, Enrique Delamónica, Manuel Garcia-Herranz, Anthony Mockler, Daniela Paolotti, Rossano Schifanella
Strengths and limitations of relative wealth indices derived from big data in Indonesia. Frontiers Big Data 6 (2023)
Stefania Fiandrino, Ciro Cattuto, Daniela Paolotti, Rossano Schifanella
Combining environmental and socioeconomic data to understand determinants of conflicts in Colombia. Frontiers Big Data 6 (2023)
Mirco Nanni, Gennady L. Andrienko, Albert-László Barabási, Chiara Boldrini, Francesco Bonchi, Ciro Cattuto, Francesca Chiaromonte, Giovanni Comandé, Marco Conti, Mark Coté, Frank Dignum, Virginia Dignum, Josep Domingo-Ferrer, Paolo Ferragina, Fosca Giannotti, Riccardo Guidotti, Dirk Helbing, Kimmo Kaski, János Kertész, Sune Lehmann, Bruno Lepri, Paul Lukowicz, Stan Matwin, David Megías Jiménez, Anna Monreale, Katharina Morik, Nuria Oliver, Andrea Passarella, Andrea Passerini, Dino Pedreschi, Alex Pentland, Fabio Pianesi, Francesca Pratesi, Salvatore Rinzivillo, Salvatore Ruggieri, Arno Siebes, Vicenç Torra, Roberto Trasarti, Jeroen van den Hoven, Alessandro Vespignani
Give more data, awareness and control to individual citizens, and they will help COVID-19 containment. Ethics Inf. Technol. 23 (S1) (2021)
Koya Sato, Mizuki Oka, Alain Barrat, Ciro Cattuto
Predicting partially observed processes on temporal networks by Dynamics-Aware Node Embeddings (DyANE). EPJ Data Sci. 10 (1) (2021)
Edoardo Galimberti, Martino Ciaperoni, Alain Barrat, Francesco Bonchi, Ciro Cattuto, Francesco Gullo
Span-core Decomposition for Temporal Networks: Algorithms and Applications. ACM Trans. Knowl. Discov. Data 15 (1) (2021)
Laura Ozella, Daniela Paolotti, Guilherme Lichand, Jorge P. Rodríguez, Simon Haenni, John Phuka, Onicio Leal Neto, Ciro Cattuto
Using wearable proximity sensors to characterize social contact patterns in a village of rural Malawi. EPJ Data Sci. 10 (1) (2021)
Mattia Mazzoli, Emanuele Pepe, David Mateo, Ciro Cattuto, Laetitia Gauvin, Paolo Bajardi, Michele Tizzoni, Alberto Hernando, Sandro Meloni, José J. Ramasco
Interplay between mobility, multi-seeding and lockdowns shapes COVID-19 local impact. PLoS Comput. Biol. 17 (10) (2021)
Vittoria Colizza, Eva Grill, Rafael T. Mikolajczyk, Ciro Cattuto, Adam J. Kucharski, Steven Riley, Michelle Kendall, Katrina A. Lythgoe, Lucie Abeler-Dörner, Chris Wymant, David Bonsall, Luca Ferretti, Christophe Fraser
Epidemiological and public health requirements for COVID-19 contact tracing apps and their evaluation. CoRR (2021)
Luca Pappalardo, Leo Ferres, Manuel Sacasa, Ciro Cattuto, Loreto Bravo
Evaluation of home detection algorithms on mobile phone data using individual-level ground truth. EPJ Data Sci. 10 (1) (2021)
Luca Pappalardo, Leo Ferres, Manuel Sacasa, Ciro Cattuto, Loreto Bravo
An individual-level ground truth dataset for home location detection. CoRR (2020)
Carmela Troncoso, Mathias Payer, Jean-Pierre Hubaux, Marcel Salathé, James R. Larus, Edouard Bugnion, Wouter Lueks, Theresa Stadler, Apostolos Pyrgelis, Daniele Antonioli, Ludovic Barman, Sylvain Chatel, Kenneth G. Paterson, Srdjan Capkun, David A. Basin, Jan Beutel, Dennis Jackson, Marc Roeschlin, Patrick Leu, Bart Preneel, Nigel P. Smart, Aysajan Abidin, Seda F. Gürses, Michael Veale, Cas Cremers, Michael Backes, Nils Ole Tippenhauer, Reuben Binns, Ciro Cattuto, Alain Barrat, Dario Fiore, Manuel Barbosa, Rui Oliveira, José Pereira
Decentralized Privacy-Preserving Proximity Tracing. CoRR (2020)
Alessandra Urbinati, Kyriaki Kalimeri, Andrea Bonanomi, Alessandro Rosina, Ciro Cattuto, Daniela Paolotti
Young Adult Unemployment Through the Lens of Social Media: Italy as a case study. CoRR (2020)
Michele Tizzoni, André Panisson, Daniela Paolotti, Ciro Cattuto
The impact of news exposure on collective attention in the United States during the 2016 Zika epidemic. PLoS Comput. Biol. 16 (3) (2020)
Nuria Oliver, Emmanuel Letouzé, Harald Sterly, Sébastien Delataille, Marco De Nadai, Bruno Lepri, Renaud Lambiotte, Richard Benjamins, Ciro Cattuto, Vittoria Colizza, Nicolas de Cordes, Samuel P. Fraiberger, Till Koebe, Sune Lehmann, Juan Murillo, Alex Pentland, Phuong N. Pham, Frédéric Pivetta, Albert Ali Salah, Jari Saramäki, Samuel V. Scarpino, Michele Tizzoni, Stefaan Verhulst, Patrick Vinck
Mobile phone data and COVID-19: Missing an opportunity? CoRR (2020)
Alessandra Urbinati, Kyriaki Kalimeri, Andrea Bonanomi, Alessandro Rosina, Ciro Cattuto, Daniela Paolotti
Young Adult Unemployment Through the Lens of Social Media: Italy as a Case Study. SocInfo (2020)
Mirco Nanni, Gennady L. Andrienko, Albert-László Barabási, Chiara Boldrini, Francesco Bonchi, Ciro Cattuto, Francesca Chiaromonte, Giovanni Comandé, Marco Conti, Mark Coté, Frank Dignum, Virginia Dignum, Josep Domingo-Ferrer, Fosca Giannotti, Riccardo Guidotti, Dirk Helbing, János Kertész, Sune Lehmann, Bruno Lepri, Paul Lukowicz, Anna Monreale, Katharina Morik, Nuria Oliver, Andrea Passarella, Andrea Passerini, Dino Pedreschi, Alex Pentland, Francesca Pratesi, Salvatore Rinzivillo, Salvatore Ruggieri, Arno Siebes, Roberto Trasarti, Jeroen van den Hoven, Alessandro Vespignani
Give more data, awareness and control to individual citizens, and they will help COVID-19 containment. CoRR (2020)
Carmela Troncoso, Mathias Payer, Jean-Pierre Hubaux, Marcel Salathé, James R. Larus, Wouter Lueks, Theresa Stadler, Apostolos Pyrgelis, Daniele Antonioli, Ludovic Barman, Sylvain Chatel, Kenneth G. Paterson, Srdjan Capkun, David A. Basin, Jan Beutel, Dennis Jackson, Marc Roeschlin, Patrick Leu, Bart Preneel, Nigel P. Smart, Aysajan Abidin, Seda Gurses, Michael Veale, Cas Cremers, Michael Backes, Nils Ole Tippenhauer, Reuben Binns, Ciro Cattuto, Alain Barrat, Dario Fiore, Manuel Barbosa, Rui Oliveira, José Pereira
Decentralized Privacy-Preserving Proximity Tracing. IEEE Data Eng. Bull. 43 (2) (2020)
Mirco Nanni, Gennady L. Andrienko, Albert-László Barabási, Chiara Boldrini, Francesco Bonchi, Ciro Cattuto, Francesca Chiaromonte, Giovanni Comandé, Marco Conti, Mark Coté, Frank Dignum, Virginia Dignum, Josep Domingo-Ferrer, Paolo Ferragina, Fosca Giannotti, Riccardo Guidotti, Dirk Helbing, Kimmo Kaski, János Kertész, Sune Lehmann, Bruno Lepri, Paul Lukowicz, Stan Matwin, David Megías, Anna Monreale, Katharina Morik, Nuria Oliver, Andrea Passarella, Andrea Passerini, Dino Pedreschi, Alex Pentland, Fabio Pianesi, Francesca Pratesi, Salvatore Rinzivillo, Salvatore Ruggieri, Arno Siebes, Vicenç Torra, Roberto Trasarti, Jeroen van den Hoven, Alessandro Vespignani
Give more data, awareness and control to individual citizens, and they will help COVID-19 containment. Trans. Data Priv. 13 (1) (2020)
Simone Piaggesi, Laetitia Gauvin, Michele Tizzoni, Ciro Cattuto, Natalia Adler, Stefaan Verhulst, Andrew Young, Rhiannan Price, Leo Ferres, André Panisson
Predicting City Poverty Using Satellite Imagery. CVPR Workshops (2019)
Kyriaki Kalimeri, Mariano G. Beiró, Matteo Delfino, Robert Raleigh, Ciro Cattuto
Predicting demographics, moral foundations, and human values from digital behaviours. Comput. Hum. Behav. 92 (2019)
Laetitia Gauvin, Michele Tizzoni, Simone Piaggesi, Andrew Young, Natalia Adler, Stefaan Verhulst, Leo Ferres, Ciro Cattuto
Gender gaps in urban mobility. CoRR (2019)
Edoardo Galimberti, Martino Ciaperoni, Alain Barrat, Francesco Bonchi, Ciro Cattuto, Francesco Gullo
Span-core Decomposition for Temporal Networks: Algorithms and Applications. CoRR (2019)
Koya Sato, Mizuki Oka, Alain Barrat, Ciro Cattuto
DyANE: Dynamics-aware node embedding for temporal networks. CoRR (2019)
Kyriaki Kalimeri, Matteo Delfino, Ciro Cattuto, Daniela Perrotta, Vittoria Colizza, Caroline Guerrisi, Clément Turbelin, Jim Duggan, John Edmunds, Chinelo Obi, Richard Pebody, Ana O. Franco, Yamir Moreno, Sandro Meloni, Carl Koppeschaar, Charlotte Kjelsø, Ricardo Mexia, Daniela Paolotti
Unsupervised extraction of epidemic syndromes from participatory influenza surveillance self-reported symptoms. PLoS Comput. Biol. 15 (4) (2019)
Ciro Cattuto
Data Science for Social Good: Opportunities and Challenges. GI-Jahrestagung (2019)
Kyriaki Kalimeri, Mariano G. Beiró, Alessandra Urbinati, Andrea Bonanomi, Alessandro Rosina, Ciro Cattuto
Human Values and Attitudes towards Vaccination in Social Media. CoRR (2019)
Kyriaki Kalimeri, Mariano G. Beiró, Alessandra Urbinati, Andrea Bonanomi, Alessandro Rosina, Ciro Cattuto
Human Values and Attitudes towards Vaccination in Social Media. WWW (Companion Volume) (2019)
Kyriaki Kalimeri, Mariano G. Beiró, Andrea Bonanomi, Alessandro Rosina, Ciro Cattuto
Evaluation of Biases in Self-reported Demographic and Psychometric Information: Traditional versus Facebook-based Surveys. CoRR (2019)
Edoardo Galimberti, Alain Barrat, Francesco Bonchi, Ciro Cattuto, Francesco Gullo
Mining (maximal) Span-cores from Temporal Networks. CIKM (2018)
Mariano G. Beiró, Loreto Bravo, Diego Caro, Ciro Cattuto, Leo Ferres, Eduardo Graells-Garrido
Shopping Mall Attraction and Social Mixing at a City Scale. CoRR (2018)
Edoardo Galimberti, Alain Barrat, Francesco Bonchi, Ciro Cattuto, Francesco Gullo
Mining (maximal) span-cores from temporal networks. CoRR (2018)
Mariano G. Beiró, Loreto Bravo, Diego Caro, Ciro Cattuto, Leo Ferres, Eduardo Graells-Garrido
Shopping mall attraction and social mixing at a city scale. EPJ Data Sci. 7 (1) (2018)
Kyriaki Kalimeri, Mariano G. Beiró, Matteo Delfino, Robert Raleigh, Ciro Cattuto
Predicting Demographics, Moral Foundations, and Human Values from Digital Behaviors. CoRR (2017)
Michele Starnini, Bruno Lepri, Andrea Baronchelli, Alain Barrat, Ciro Cattuto, Romualdo Pastor-Satorras
Robust modeling of human contact networks across different scales and proximity-sensing techniques. CoRR (2017)
Michele Starnini, Bruno Lepri, Andrea Baronchelli, Alain Barrat, Ciro Cattuto, Romualdo Pastor-Satorras
Robust Modeling of Human Contact Networks Across Different Scales and Proximity-Sensing Techniques. SocInfo (1) (2017)
Moses C. Kiti, Michele Tizzoni, Timothy M. Kinyanjui, Dorothy C. Koech, Patrick K. Munywoki, Milosch Meriac, Luca Cappa, André Panisson, Alain Barrat, Ciro Cattuto, D. James Nokes
Quantifying social contacts in a household setting of rural Kenya using wearable proximity sensors. EPJ Data Sci. 5 (1) (2016)
Mariano G. Beiró, André Panisson, Michele Tizzoni, Ciro Cattuto
Predicting human mobility through the assimilation of social media traces into mobility models. CoRR (2016)
Mariano G. Beiró, André Panisson, Michele Tizzoni, Ciro Cattuto
Predicting human mobility through the assimilation of social media traces into mobility models. EPJ Data Sci. 5 (1) (2016)
Laetitia Gauvin, André Panisson, Alain Barrat, Ciro Cattuto
Revealing latent factors of temporal networks for mesoscale intervention in epidemic spread. CoRR (2015)
Mark Kibanov, Martin Atzmueller, Jens Illig, Christoph Scholz, Alain Barrat, Ciro Cattuto, Gerd Stumme
Is Web Content a Good Proxy for Real-Life Interaction?: A Case Study Considering Online and Offline Interactions of Computer Scientists. ASONAM (2015)
Anna Sapienza, André Panisson, Joseph Wu, Laetitia Gauvin, Ciro Cattuto
Anomaly Detection in Temporal Graph Data: An Iterative Tensor Decomposition and Masking Approach. AALTD@PKDD/ECML (2015)
Anna Sapienza, André Panisson, Joseph Wu, Laetitia Gauvin, Ciro Cattuto
Detecting Anomalies in Time-Varying Networks Using Tensor Decomposition. ICDM Workshops (2015)
Mathieu Génois, Christian L. Vestergaard, Ciro Cattuto, Alain Barrat
Compensating for population sampling in simulations of epidemic spread on temporal contact networks. CoRR (2015)
André Panisson, Laetitia Gauvin, Marco Quaggiotto, Ciro Cattuto
Mining Concurrent Topical Activity in Microblog Streams. CoRR (2014)
André Panisson, Laetitia Gauvin, Marco Quaggiotto, Ciro Cattuto
Mining Concurrent Topical Activity in Microblog Streams. #MSM (2014)
André Panisson, Laetitia Gauvin, Alain Barrat, Ciro Cattuto
Fingerprinting temporal networks of close-range human proximity. PerCom Workshops (2013)
Alain Barrat, Ciro Cattuto
Temporal networks of face-to-face human interactions CoRR (2013)
Laetitia Gauvin, André Panisson, Ciro Cattuto, Alain Barrat
Activity clocks: spreading dynamics on temporal networks of human contact. CoRR (2013)
Juliette Stehlé, François Charbonnier, Tristan Picard, Ciro Cattuto, Alain Barrat
Gender homophily from spatial behavior in a primary school: a sociometric study. CoRR (2013)
Michele Starnini, Anna Machens, Ciro Cattuto, Alain Barrat, Romualdo Pastor-Satorras
Immunization strategies for epidemic processes in time-varying contact networks CoRR (2013)
Christoph Scholz, Martin Atzmueller, Alain Barrat, Ciro Cattuto, Gerd Stumme
New Insights and Methods For Predicting Face-To-Face Contacts. ICWSM (2013)
Laetitia Gauvin, André Panisson, Ciro Cattuto
Detecting the community structure and activity patterns of temporal networks: a non-negative tensor factorization approach. CoRR (2013)
Juliette Stehlé, François Charbonnier, Tristan Picard, Ciro Cattuto, Alain Barrat
Gender homophily from spatial behavior in a primary school: A sociometric study. Soc. Networks 35 (4) (2013)
Ciro Cattuto, Marco Quaggiotto, André Panisson, Alex Averbuch
Time-varying social networks in a graph database: a Neo4j use case. GRADES (2013)
Marcel Salathé, Linus Bengtsson, Todd J. Bodnar, Devon D. Brewer, John S. Brownstein, Caroline O. Buckee, Ellsworth M. Campbell, Ciro Cattuto, Shashank Khandelwal, Patricia L. Mabry, Alessandro Vespignani
Digital Epidemiology. PLoS Comput. Biol. 8 (7) (2012)
André Panisson, Alain Barrat, Ciro Cattuto, Wouter Van den Broeck, Giancarlo Ruffo, Rossano Schifanella
On the dynamics of human proximity for data diffusion in ad-hoc networks. Ad Hoc Networks 10 (8) (2012)
Luca Maria Aiello, Alain Barrat, Rossano Schifanella, Ciro Cattuto, Benjamin Markines, Filippo Menczer
Friendship prediction and homophily in social media. ACM Trans. Web 6 (2) (2012)
Luca Maria Aiello, Alain Barrat, Ciro Cattuto, Rossano Schifanella, Giancarlo Ruffo
Link creation and information spreading over social and communication ties in an interest-based online social network. EPJ Data Sci. 1 (1) (2012)
Janette Lehmann, Bruno Gonçalves, José J. Ramasco, Ciro Cattuto
Dynamical classes of collective attention in twitter. WWW (2012)
Juliette Stehlé, N. Voirin, Alain Barrat, Ciro Cattuto, Lorenzo Isella, Jean-François Pinton, Marco Quaggiotto, Wouter Van den Broeck, C. Régis, B. Lina, P. Vanhems
High-resolution measurements of face-to-face contact patterns in a primary school CoRR (2011)
Martin Szomszor, Patty Kostkova, Ciro Cattuto, Wouter Van den Broeck, Alain Barrat, Harith Alani
Providing Enhanced Social Interaction Services for Industry Exhibitors at Large Medical Conferences. DeSE (2011)
Lorenzo Isella, Mariateresa Romano, Alain Barrat, Ciro Cattuto, Vittoria Colizza, Wouter Van den Broeck, Francesco Gesualdo, Elisabetta Pandolfi, L. Ravà, Caterina Rizzo, Alberto E. Tozzi
Close encounters in a pediatric ward: measuring face-to-face proximity and mixing patterns with wearable sensors CoRR (2011)
Ciro Cattuto, Andreas Hotho
Introduction to the Special Issue on Social Linking and Hypermedia. New Rev. Hypermedia Multim. 17 (3) (2011)
Janette Lehmann, Bruno Gonçalves, José J. Ramasco, Ciro Cattuto
Dynamical Classes of Collective Attention in Twitter CoRR (2011)
André Panisson, Alain Barrat, Ciro Cattuto, Wouter Van den Broeck, Giancarlo Ruffo, Rossano Schifanella
On the Dynamics of Human Proximity for Data Diffusion in Ad-Hoc Networks CoRR (2011)
Rossano Schifanella, Alain Barrat, Ciro Cattuto, Benjamin Markines, Filippo Menczer
Folks in Folksonomies: Social Link Prediction from Shared Metadata CoRR (2010)
Luca Maria Aiello, Alain Barrat, Ciro Cattuto, Giancarlo Ruffo, Rossano Schifanella
Link creation and profile alignment in the aNobii social network CoRR (2010)
Alain Barrat, Ciro Cattuto, Vittoria Colizza, Lorenzo Isella, Caterina Rizzo, Alberto E. Tozzi, Wouter Van den Broeck
Wearable Sensor Networks for Measuring Face-to-Face Contact Patterns in Healthcare Settings. eHealth (2010)
Luca Maria Aiello, Alain Barrat, Ciro Cattuto, Giancarlo Ruffo, Rossano Schifanella
Link Creation and Profile Alignment in the aNobii Social Network. SocialCom/PASSAT (2010)
Alain Barrat, Ciro Cattuto, Martin Szomszor, Wouter Van den Broeck, Harith Alani
Social Dynamics in Conferences: Analyses of Data from the Live Social Semantics Application. ISWC (2) (2010)
Ciro Cattuto, Wouter Van den Broeck, Alain Barrat, Vittoria Colizza, Jean-François Pinton, Alessandro Vespignani
Dynamics of person-to-person interactions from distributed RFID sensor networks CoRR (2010)
Martin Szomszor, Ciro Cattuto, Wouter Van den Broeck, Alain Barrat, Harith Alani
Semantics, Sensors, and the Social Web: The Live Social Semantics Experiments. ESWC (2) (2010)
Lorenzo Isella, Juliette Stehlé, Alain Barrat, Ciro Cattuto, Jean-François Pinton, Wouter Van den Broeck
What's in a crowd? Analysis of face-to-face behavioral networks CoRR (2010)
Rossano Schifanella, Alain Barrat, Ciro Cattuto, Benjamin Markines, Filippo Menczer
Folks in Folksonomies: social link prediction from shared metadata. WSDM (2010)
Wouter Van den Broeck, Ciro Cattuto, Alain Barrat, Martin Szomszor, Gianluca Correndo, Harith Alani
The Live Social Semantics application: a platform for integrating face-to-face presence with on-line social networking. PerCom Workshops (2010)
Benjamin Markines, Ciro Cattuto, Filippo Menczer, Dominik Benz, Andreas Hotho, Gerd Stumme
Evaluating similarity measures for emergent semantics of social tagging. WWW (2009)
Harith Alani, Martin Szomszor, Ciro Cattuto, Wouter Van den Broeck, Gianluca Correndo, Alain Barrat
Live Social Semantics. ISWC (2009)
Benjamin Markines, Ciro Cattuto, Filippo Menczer
Social spam detection. AIRWeb (2009)
Ciro Cattuto, Alain Barrat, Andrea Baldassarri, G. Schehr, Vittorio Loreto
Collective dynamics of social annotation CoRR (2009)
Alexandre Passant, Ian Mulvany, Peter Mika, Nicolas Maisonneuve, Alexander Löser, Ciro Cattuto, Christian Bizer, Christian Bauckhage, Harith Alani
08391 Group Summary - Mining for Social Serendipity. Social Web Communities (2008)
Ciro Cattuto, Dominik Benz, Andreas Hotho, Gerd Stumme
Semantic Analysis of Tag Similarity Measures in Collaborative Tagging Systems CoRR (2008)
Alain Barrat, Ciro Cattuto, Vittoria Colizza, Jean-François Pinton, Wouter Van den Broeck, Alessandro Vespignani
High resolution dynamical mapping of social interactions with active RFID CoRR (2008)
Ciro Cattuto, Filippo Menczer, Giancarlo Ruffo
Torino (Italy) to host the 20th ACM Hypertext and Hypermedia Conference in June 2009. SIGWEB Newsl. 2008 (Autumn) (2008)
Ciro Cattuto, Andrea Baldassarri, Vito Domenico Pietro Servedio, Vittorio Loreto
Emergent Community Structure in Social Tagging Systems. Adv. Complex Syst. 11 (4) (2008)
Ciro Cattuto, Dominik Benz, Andreas Hotho, Gerd Stumme
Semantic Grounding of Tag Relatedness in Social Bookmarking Systems. ISWC (2008)
Ciro Cattuto, Dominik Benz, Andreas Hotho, Gerd Stumme
Semantic Analysis of Tag Similarity Measures in Collaborative Tagging Systems. LWA (2008)
Ciro Cattuto, Andrea Baldassarri, Vito Domenico Pietro Servedio, Vittorio Loreto
Emergent Community Structure in Social Tagging Systems CoRR (2008)
Ciro Cattuto, Christoph Schmitz, Andrea Baldassarri, Vito Domenico Pietro Servedio, Vittorio Loreto, Andreas Hotho, Miranda Grahl, Gerd Stumme
Network properties of folksonomies. AI Commun. 20 (4) (2007)
Ciro Cattuto, Andrea Baldassarri, Vito Domenico Pietro Servedio, Vittorio Loreto
Vocabulary growth in collaborative tagging systems CoRR (2007)
Ciro Cattuto, Vittorio Loreto, Luciano Pietronero
Collaborative Tagging and Semiotic Dynamics CoRR (2006)