It has been used for event detection (Pozdnoukhov and Kaiser, 2011;Ertl et al., 2012;Vavliakis et al., 2012;Lau et al., 2012;Zhou and Chen, 2014), summarization, or finding influential users in social media.
only few studies used LDA to detect topic changes over time (Lau et al., 2012;Zhou and Chen, 2014).