Berlin 2012 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
SOE: Fachverband Physik sozio-ökonomischer Systeme
SOE 14: Networks, From Topology to Dynamics III (joint w. DY)
SOE 14.5: Vortrag
Mittwoch, 28. März 2012, 16:00–16:15, MA 004
Information spread via on-line networks: from time series to co-evolving functional networks — •Jan W. Kantelhardt1, Mirko Kämpf1, Shlomo Havlin2, and Lev Muchnik3 — 1Institut für Physik, Martin-Luther Universität Halle-Wittenberg, Halle/Saale, Germany — 2Physics Department, Bar-Ilan University, Ramat Gan, Israel — 3Leonard N. Stern School of Business, New York University, USA
Human interaction and information spread via on-line networks is becoming increasingly important for our contemporary technological society. Here, we characterize and compare three organizational and dynamical network structures associated with the online encyclopedia Wikipedia. We study (i) the network of the direct links between Wikipedia articles of various languages, (ii) the usage network as determined from cross-correlations between click-count time series of many pairs of articles, and (iii) the edit network as determined from co-incident edit events. The major goal is to find correlations between components of these three networks that characterize the dynamics of information spread in the complex system. We find that even though the dynamics of article click and edit time series are characteristically different - download activity is characterised by strongly persistent fluctuations (scaling exponent α ≈ 0.9), while edit activity is only short-term correlated - there are indications of a co-evolution of the corresponding dynamic networks. The results help in understanding the complex process of collecting, processing, validating, and distributing information in self-organised social networks.