Semantically aware time evolution tracking of communities in co-authorship networks

Dionisios N. Sotiropoulos, Demitrios E. Pournarakis, George M. Giaglis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This is paper addresses the problem of tracking the time evolution of communities within co-authorship networks. We consider an evolutionary clustering approach which adapts the statistical framework of shrinkage estimation to obtain a smoothed version of the overall affinity matrix as the optimal weighted average between the matrices of past and current affinities. Moreover, the current affinity matrix at each time step is formed as the optimal mixing between the raw structural relationships between authors coupled with the semantic similarity of their published works, captured by performing LDA-based topic modeling on the corresponding corpora of abstracts. The proposed parametric weighting scheme is simultaneously optimized on a real co-authorship dataset emerging from the network of participants in the ICMB conferences, held from 2002 to 2013. Finally, community detection at each time step is conducted by employing spectral clustering on the estimated overall weight matrix. The obtained results justify that our approach provides a clearer revelation of the inherent authors' communities dynamics when compared against incremental cluster formations that rely exclusively on the structural information of the co-authorship network.

Original languageEnglish
Title of host publicationProceedings - 19th Panhellenic Conference on Informatics, PCI 2015
PublisherAssociation for Computing Machinery
Pages97-102
Number of pages6
Volume01-03-October-2015
ISBN (Electronic)9781450335515
DOIs
Publication statusPublished - 1 Oct 2015
Event19th Panhellenic Conference on Informatics, PCI 2015 - Athens, Greece
Duration: 1 Oct 20153 Oct 2015

Other

Other19th Panhellenic Conference on Informatics, PCI 2015
CountryGreece
CityAthens
Period1/10/153/10/15

Keywords

  • Co-authorship networks
  • Community detection
  • Ptopic modeling
  • Social networks analysis
  • Spectral clustering

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  • Cite this

    Sotiropoulos, D. N., Pournarakis, D. E., & Giaglis, G. M. (2015). Semantically aware time evolution tracking of communities in co-authorship networks. In Proceedings - 19th Panhellenic Conference on Informatics, PCI 2015 (Vol. 01-03-October-2015, pp. 97-102). Association for Computing Machinery. https://doi.org/10.1145/2801948.2802008