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Discovering topic structures of a temporally evolving document corpus

Beykikhoshk, Adham, Arandjelovic, Ognjen, Phung, Quoc-Dinh and Venkatesh, Svetha 2017, Discovering topic structures of a temporally evolving document corpus, Knowledge and Information Systems, pp. 1-34, doi: 10.1007/s10115-017-1095-4.

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Title Discovering topic structures of a temporally evolving document corpus
Author(s) Beykikhoshk, Adham
Arandjelovic, Ognjen
Phung, Quoc-DinhORCID iD for Phung, Quoc-Dinh orcid.org/0000-0002-9977-8247
Venkatesh, SvethaORCID iD for Venkatesh, Svetha orcid.org/0000-0001-8675-6631
Journal name Knowledge and Information Systems
Start page 1
End page 34
Total pages 34
Publisher Springer U K
Place of publication London, Eng.
Publication date 2017-12-31
ISSN 0219-1377
0219-3116
Keyword(s) data mining
nonparametric
Bayesian
autism
ASD
metabolic syndrome (MetS)
Summary In this paper we describe a novel framework for the discovery of the topical content of a data corpus, and the tracking of its complex structural changes across the temporal dimension. In contrast to previous work our model does not impose a prior on the rate at which documents are added to the corpus nor does it adopt the Markovian assumption which overly restricts the type of changes that the model can capture. Our key technical contribution is a framework based on (i) discretization of time into epochs, (ii) epoch-wise topic discovery using a hierarchical Dirichlet process-based model, and (iii) a temporal similarity graph which allows for the modelling of complex topic changes: emergence and disappearance, evolution, splitting, and merging. The power of the proposed framework is demonstrated on two medical literature corpora concerned with the autism spectrum disorder (ASD) and the metabolic syndrome (MetS)—both increasingly important research subjects with significant social and healthcare consequences. In addition to the collected ASD and metabolic syndrome literature corpora which we made freely available, our contribution also includes an extensive empirical analysis of the proposed framework. We describe a detailed and careful examination of the effects that our algorithms’s free parameters have on its output and discuss the significance of the findings both in the context of the practical application of our algorithm as well as in the context of the existing body of work on temporal topic analysis. Our quantitative analysis is followed by several qualitative case studies highly relevant to the current research on ASD and MetS, on which our algorithm is shown to capture well the actual developments in these fields.
Language eng
DOI 10.1007/s10115-017-1095-4
Field of Research 0801 Artificial Intelligence And Image Processing
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2017, The Authors
Persistent URL http://hdl.handle.net/10536/DRO/DU:30098031

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