Publication Date

Fall 2018

Degree Type


Degree Name

Master of Science (MS)


Computer Engineering


Magdalini Eirinaki


influence propagation, matrix factorization, recommendation system, social network, social regularization

Subject Areas

Computer engineering


In recent years, with the rise of online social networks, personalized recommendations that leverage the aspect of social connections have become a very intriguing domain for researchers. In this work, we explore how influence propagation and the decay in the cascading effect of influence from influential users can be leveraged to generate social graph-based recommendations. Understanding how influence propagates within a social network is itself a challenging problem. In this research, we model the decay in influence propagation in directed graphs, utilizing the structural properties of the social graph to measure the propagated influence beyond one-hop. This social network information from influence propagation is also combined with matrix factorization as a social regularization factor. We then employ this unified framework to form social recommendations, and present our experimental results using real-life datasets. Extensive experimental analysis demonstrate that our proposed methodology outperforms state-of-the-art techniques for generating social recommendations.