Adaptive Identification of Hashtags for Real-Time Event Data Collection.- Comparison of Emoticon Recommendation Methods to Improve Computer-Mediated Communication.- Accuracy vs Novelty & Diversity in Recommender Systems: A Non-Uniform Random Walk Approach.- Social Network Derived Credibility.- Anonymizing Social Network Data for Maximal Frequent-Sharing Pattern Mining.- A Comprehensive Analysis of Detection of Online Paid Posters.- An Improved Collaborative Recommendation System by Integration of Social Tagging Data.- Personalization of Web Search using Social Signals.- The Pareto Principle is Everywhere: Finding Informative Sentences for Opinion Summarization through Leader Detection.- Social Media Question Asking: A Developing Country Perspective.- Evolutionary Influence Maximization in Viral-Marketing.- Mining and Analyzing the Italian Parliament: Party Structure and Evolution.