Improving Recommendation Quality by Merging Collaborative Filtering and   Social Relationships
  Matrix Factorization techniques have been successfully applied to raise the quality of suggestions generated by Collaborative Filtering Systems (CFSs). Traditional CFSs based on Matrix Factorization operate on the ratings provided by users and have been recently extended to incorporate demographic aspects such as age and gender. In this paper we propose to merge CFS based on Matrix Factorization and information regarding social friendships in order to provide users with more accurate suggestions and rankings on items of their interest. The proposed approach has been evaluated on a real-life online social network; the experimental results show an improvement against existing CFSs. A detailed comparison with related literature is also present. 
Pasquale De Meo, Emilio Ferrara, Giacomo Fiumara, Alessandro Provetti
cs.SI cs.IR physics.soc-ph