Palma de Mallorca

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The IFISC (Institute for Cross-Disciplinary Physics and Complex Systems) organizes the conference:
Wikipedia information flow analysis reveals the scale-free architecture of the Semantic Space.

  • By: Dr. A.P. Masucci, IFISC
  • Date: Thursday of January 27, 2011 at 03:00 PM.
  • Where: IFISC Seminar Room. Instituto de Física Interdisciplinar y Sistemas Complejos (CSIC-UIB). Ed. Instituts Universitaris de Recerca. Campus Universitat de les Illes Balears, Palma de Mallorca, Spain.
  • Abstract : We extract the topology of the semantic space in its encyclopedic acception, measuring the semantic flow between the different entries of the largest modern encyclopedia, Wikipedia, and thus creating a directed complex network of semantic flows. Notably at the percolation threshold the semantic space is characterised by scale-free behaviour at different levels of complexity, this relating the semantic space to a wide range of biological, social and linguistics phenomena. In particular we find that the cluster size distribution, representing the size of different semantic areas, is scale-free. Moreover the topology of the resulting semantic space is scale-free in the connectivity distribution and displays small-world properties. However its statistical properties do not allow a classical interpretation via a generative model based on a simple multiplicative process. After giving a detailed description and interpretation of the topological properties of the semantic space, we introduce a stochastic model of content-based network, based on a copy and mutation algorithm and on the Heaps' law, that is able to capture the main statistical properties of the analysed semantic space, including the Zipf's law for the word frequency distribution.
  • Video : This seminar will be broadcast live
  • Contact Information: Adolfo Paolo Masucci, IFISC (CSIC-UIB) and Ernesto Nicola IFISC (CSIC-UIB)