Serendipity-Based Recommendation Framework for SNS Users Using Tie Strength and Relation Clustering.

As contents are overflowing in Social Network Services (SNSs), the Recommender System (RS) in SNS became increasingly important. Traditional RSs focus on the relevance of contents to the users and therefore recommend obvious contents over and over again. To solve this problem, many researches have sought to find serendipity, but they have the limitation of recommending obvious or absurd posts. In this paper, we propose a novel method to recommend serendipity using tie strength of the users' social relationships. Through the implementation of this method, serendipity can be recommended without analyzing user preferences or contents. We developed an illustrative example to prove validity of our framework.