Lightning Session 1: Diffusion & Propagation; Topics, Sentiment & Emotion

**Extracting Diverse Sentiment Expressions with Target-dependent Polarity from Twitter**\\ Lu Chen (Wright State University), Wenbo Wang (Wright State University), Meenakshi Nagarajan (IBM Research), Shaojun Wang (Wright State University), Amit P. Sheth (Wright State University) **OMG, I Have to Tweet That! A Study of Factors that Influence Tweet Rates**\\ Emre Kıcıman (Microsoft Research) **Event Diffusion Patterns in Social Media**\\ Minkyoung Kim, Lexing Xie, Peter Christen (Australian National University) **Virality and Susceptibility in Information Diffusions**\\ Tuan-Anh Hoang, Ee-Peng Lim (Singapore Management University) **People Are Strange When You're a Stranger: Impact and Influence of Bots on Social Networks**\\ Luca Maria Aiello, Martina Deplano, Rossano Schifanella, Giancarlo Ruffo (Università degli Studi di Torino) **You Too?! Mixed-Initiative LDA Story Matching to Help Teens in Distress**\\ Karthik Dinakar (MIT), Birago Jones (MIT), Henry Lieberman (MIT), Rosalind Picard (MIT), Carolyn Rose (Carnegie Mellon University), Matthew Thoman (Northeastern University), Roi Reichart (MIT) **Managing Bad News in Social Media: A Case Study on the Domino’s Pizza Crisis**\\ Jaram Park, Meeyoung Cha, Hoh Kim and Jaeseung Jeong (KAIST)