Directed reading/literature review

Each student needs to pickup one topic related to information retrieval and analysis, and read at least 5 research papers on this topic, from the papers published in the following conferences  (SIGIR, WWW, WSDM, KDD, CIKM). You will need to write a report up to 4-pages in ACM proceeding format. 

My topic: Recommender System

I have put 5 papers in the compressed file