부산대학교 도서관

The digital world has opened up a new realm of involvement for people from ages eight to eighty. Online social media and news articles are both vital parts of the modern digital world, where users tend to spend most of their time. Users post comments in online social platforms on various topics and create user engagement through discussions and conversations with other users on a topic in the online platform. User engagement is one of the most important revenue factors of online publishing houses. But, discussion and conversational flow of the topic tends to change and even drift to out-of-topic contexts as different users post in these social platforms. Topic drift can have a significant effect on future user engagement in terms of ‘comments' or ‘likes' and subsequently the revenue metric. In one direction, topic drift towards a totally different area may significantly reduce future user engagement on that article but on the other hand topic drift towards any ‘controversial’ or ‘hot’ topic in that particular time frame can increase future engagement. Thus topic drift is an important phenomena in the online world. In this paper, our aim is to identify how topic flow changes and explore the various characteristics of topic drift and user behavior in online forums.