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  5. The influence of network structures of Wikipedia discussion pages on the efficiency of WikiProjects
 
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The influence of network structures of Wikipedia discussion pages on the efficiency of WikiProjects

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Author(s)
Qin, Xiangju 
Cunningham, Pádraig 
Salter-Townshend, Michael 
Uri
http://hdl.handle.net/10197/9073
Date Issued
October 2015
Date Available
01T17:13:11Z December 2017
Abstract
The proliferation of online communities has attracted much attention to modelling user behaviour in terms of social interaction, language adoption and contribution activity. Nevertheless, when applied to large-scale and cross-platform behavioural data, existing approaches generally suffer from expressiveness, scalability and generality issues. This paper proposes trans-dimensional von Mises-Fisher (TvMF) mixture models for L2 normalised behavioural data, which encapsulate: (1) a Bayesian framework for vMF mixtures that enables prior knowledge and information sharing among clusters, (2) an extended version of reversible jump MCMC algorithm that allows adaptive changes in the number of clusters for vMF mixtures when the model parameters are updated, and (3) an online TvMF mixture model that accommodates the dynamics of clusters for time-varying user behavioural data. We develop efficient collapsed Gibbs sampling techniques for posterior inference, which facilitates parallelism for parameter updates. Empirical results on simulated and real-world data show that the proposed TvMF mixture models can discover more interpretable and intuitive clusters than other widely-used models, such as k-means, non-negative matrix factorization (NMF), Dirichlet process Gaussian mixture models (DP-GMM), and dynamic topic models (DTM). We further evaluate the performance of proposed models in real-world applications, such as the churn prediction task, that shows the usefulness of the features generated.
Type of Material
Journal Article
Publisher
Elsevier
Journal
Social Networks
Volume
43
Start Page
1
End Page
15
Copyright (Published Version)
2015 Elsevier
Keywords
  • Network social capita...

  • Effectiveness

  • Wikipedia

  • Community governance

  • Longitudinal study

  • Leadership

DOI
10.1016/j.socnet.2015.04.002
Language
English
Status of Item
Peer reviewed
This item is made available under a Creative Commons License
https://creativecommons.org/licenses/by-nc-nd/3.0/ie/
Owning collection
Mathematics and Statistics Research Collection
Scopus© citations
10
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Feb 7, 2023
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Feb 8, 2023
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