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This paper presents a novel unsupervised method for hierarchical topic segmentation. Lexical cohesion – the workhorse of unsu- pervised linear segmentation – is treated as a multi-scale phenomenon, and formalized …...

We apply two new automated semantic eval- uations to three distinct latent topic models. Both metrics have been shown to align with human evaluations and provide a balance be- tween …...

Search personalization that considers the social dimension of the web has attracted a significant volume of research in recent years. A user pro- file is usually needed to represent a …...