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Invited Talk by Prof. Yang Chen (Fudan University): “The Power of Comments: Fostering Social Interactions in Microblog Networks” on Wednesday

Title: The Power of Comments: Fostering Social Interactions in Microblog Networks

Speaker: Yang Chen

Location: Ernst-Reuter-Platz 7, 10587 Berlin, Room: Auditorium 3 (20th floor)

Date: Wednesday, 24 August, 2:00 pm – 3:00 pm


Abstract: Today's ubiquitous online social networks serve multiple purposes, including social communication (Facebook, Orkut), and news dissemination (Twitter). But what about a social network's design defines its functionality? Answering this would allow social network providers to take a proactive role in defining and guiding user behavior. In this work, we take a first step to answer this question with a data-driven approach, through measurement and analysis of the Sina Weibo microblogging service. Often compared to Twitter because of its format, Weibo is interesting for our analysis because it serves as both a social communication tool and a platform for news dissemination. While similar to Twitter in functionality, Weibo provides a distinguishing feature, comments, allowing users to form threaded conversations around a single tweet. Our study focuses on this feature, and how it contributes to interactions and encourages social engagement. We use analysis of comment interactions to uncover their role in social interactivity, and use comment graphs to demonstrate the structure of Weibo user interactions. Finally, we present a case study that shows the impact of comments in malicious user detection, a key application on microblogging systems. Using properties of comments significantly improves accuracy in both modeling and detection of malicious users.

Bio: Yang Chen is a Pre-tenure Associate Professor within the School of Computer Science at Fudan University, and leads the the Mobile Systems and Networking (MSN) group at Fudan. Before that, he was a postdoctoral associate at the Department of Computer Science, Duke University, USA, where he served as Senior Personnel in the NSF MobilityFirst project. He received his B.S. and Ph.D. degrees from Department of Electronic Engineering, Tsinghua University in 2004 and 2009, respectively. He visited Stanford University (in 2007) and Microsoft Research Asia (2006-2008) as a visiting student. His research interests include Internet architecture, mobile computing, cloud computing, and online social networking. He has served / is serving as an Editorial Board Member of the Transactions on Emerging Telecommunications Technologies (ETT), an Associate Editor of IEEE Access, and a guest editor of Elsevier Computer Networks (Special Issue on Measurement-based Optimization of P2P Networking and Applications), and a co-founder of the International Workshop on Hot Topics in Planet-scale mObile computing and online Social neTworking (HotPOST). He served as a session chair / TPC Member for many international conferences, including WWW, ICDCS, IWQoS, ICCCN, GLOBECOM, ICC, and CCW. He published more than 50 referred papers in international journals and conferences, including IEEE TPDS, IEEE TSC, IEEE TNSM, IEEE Communications Magazine, Middleware, ICDE, COSN, CIKM and IWQoS. He is a senior member of the IEEE.


We are looking forward to seeing you there!

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