Authoritative sources in a hyperlinked environment
Journal of the ACM (JACM)
A vector space model for automatic indexing
Communications of the ACM
The Journal of Machine Learning Research
CrimeNet explorer: a framework for criminal network knowledge discovery
ACM Transactions on Information Systems (TOIS)
US Domestic Extremist Groups on the Web: Link and Content Analysis
IEEE Intelligent Systems
Applying Authorship Analysis to Extremist-Group Web Forum Messages
IEEE Intelligent Systems
Social Computing and Weighting to Identify Member Roles in Online Communities
WI '05 Proceedings of the 2005 IEEE/WIC/ACM International Conference on Web Intelligence
Employing Latent Dirichlet Allocation for fraud detection in telecommunications
Pattern Recognition Letters
Sentiment analysis in multiple languages: Feature selection for opinion classification in Web forums
ACM Transactions on Information Systems (TOIS)
Communications of the ACM
Knowledge sharing in virtual communities – a review of the empirical research
International Journal of Web Based Communities
Linked latent Dirichlet allocation in web spam filtering
Proceedings of the 5th International Workshop on Adversarial Information Retrieval on the Web
Investigating social network patterns within an empathic online community for older people
Computers in Human Behavior
Social network analysis for email classification
Proceedings of the 46th Annual Southeast Regional Conference on XX
Topic and role discovery in social networks with experiments on enron and academic email
Journal of Artificial Intelligence Research
Topic and role discovery in social networks
IJCAI'05 Proceedings of the 19th international joint conference on Artificial intelligence
Mining communities in networks: a solution for consistency and its evaluation
Proceedings of the 9th ACM SIGCOMM conference on Internet measurement conference
Information Systems
Virtual Communities of Practice's Purpose Evolution Analysis Using a Concept-Based Mining Approach
KES '09 Proceedings of the 13th International Conference on Knowledge-Based and Intelligent Information and Engineering Systems: Part II
Dark web forums portal: searching and analyzing Jihadist forums
ISI'09 Proceedings of the 2009 IEEE international conference on Intelligence and security informatics
Finding leaders from opinion networks
ISI'09 Proceedings of the 2009 IEEE international conference on Intelligence and security informatics
A dissimilarity measure for automate moderation in online social networks
Proceedings of the 4th International Workshop on Web Intelligence & Communities
Dark Web portal overlapping community detection based on topic models
Proceedings of the ACM SIGKDD Workshop on Intelligence and Security Informatics
Expert Systems with Applications: An International Journal
A new dissimilarity measure for online social networks moderation
Web Intelligence and Agent Systems - Web Intelligence and Communities
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The study of extremist groups and their interaction is a crucial task in order to maintain homeland security and peace. Tools such as social networks analysis and text mining have contributed to the understanding of this kind of groups in order to develop counter-terrorism applications. This work addresses the topic-based community key members extraction problem, for which our method combines both text mining and social network analysis techniques. This is achieved by first applying latent Dirichlet allocation to build two topic-based social networks: one social network oriented towards the thread creator point-of-view, and the other one oriented towards the repliers of the overall forum. Then, by using different Social Network Analysis measures, topic-based key members are evaluated using as benchmark a social network built using the plain documents. Experiments were performed using an English language based forum available in the Dark Web portal.