9:00-9:05	Welcome and Introduction
9:05-10:00	Keynote: Leveraging Social Networks in the Design of Distributed Systems
	Stratis Ioannidis (Technicolor Corporate Research, Paris Laboratory) Abstract: People are social beings, and their behavior is largely determined by their social interactions as well as by the communities to which they belong. The performance of several real-life systems (such as CDNs, p2p applications and recommender systems) is affected by the social behavior of their users; as a result, knowledge of this behavior can be exploited to yield significant performance improvements. In this talk, we consider two examples of distributed systems for which this principle holds. The first is a p2p content distribution system deployed over mobile devices: users carrying these devices download dynamic content, such as a newsfeed or traffic information, and share it with other users they meet. We describe a simple, distributed mechanism that leverages the users' social behavior to disseminate content updates. Furthermore, we establish a condition on the social network these users form under which our system scales well as the user population grows. The second example we consider is a distributed mechanism giving daily blog recommendations to websurfers. Each day, a websurfer visits a sequence of blogs recommended by our mechanism and selects one that matches her daily interests, thereby providing the mechanism with feedback. Moreover, websurfers form communities and share their feedback with other community members. Our analysis characterizes the quality of blog recommendations in terms of the size of the community and the degree of similarity of interests among its members. In particular, we show that sharing feedback significantly accelerates convergence to an optimal recommendation scheme. Bio: Stratis Ioannidis was born in Athens, Greece. He received his B.Sc. (2002) in Electrical and Computer engineering from the National Technical University in Athens, Greece, M.Sc. (2004) and Ph.D. (2009) in Computer Science from the University of Toronto, Canada. He is currently a post-doctoral researcher at Technicolor, in Paris, France. His research interests include social networks, p2p systems, content delivery networks and delay-tolerant networks.
10:00-10:30	coffee
10:30-12:00	Session 1 - Online Social Networks
	Profile Popularity in a Business-Oriented Online Social Network Thorsten Strufe (TU Darmstadt)
	Building an Academic Social Network for Bologna MobilityAntonio Jorge and Porfírio Filipe (GuIAA - ISEL - Instituto)
	Why spammers should thank Google?Mohamed Ali Kaafar and Pere Manils (INRIA)
12:00-13:30	lunch
13:30-14:30	Keynote: The Elephant in the Room or Why people don't trust Geeks bearing Gifts
	Jon Crowcroft (University of Cambridge) Abstract: Why is it that users trust google (buzz) and facebook when they don't seem to trust researchers? This is a question which we need to answer if social network systems research is to have an impact. It is also a social network research question. Why is there a the disparity between academic and deployed systems? Looking back at p2p, manet and social nets, all the things that people actually used were grass roots community things - How is it that systems as badly designed as gnutella, and in social nets, facebook and twitter, succeed? that is the interesting thing I think:) Even early versions of bittorrent were pretty horrible, although now they are benefitting from academics sneaking ideas in (trackerlessness and bittryant, for example). Is it merely who offers the system, or is there some aspect of grassroots (or skunkworks) projects that means that they are less offputting than the academic systems? Is there a way for academics to make their systems look more "funky" or "street" or whatever it takes? In this talk, I will discuss some of these questions and see if you (the audience) have any answers! Bio: Jon Crowcroft is the Marconi Professor of Communications Systems in the Computer Lab, at the University of Cambridge. Jon graduated in Physics from Trinity College, Cambridge University in 1979, and got an MSc in Computing in 1981, and PhD in 1993 both from UCL. He is a fellow of the ACM, the British Computer Society, the IET, the royal academy of engineering and the IEEE. Jon is a recipient of ACM SIGCOMM Award in 2009.
14:30-15:00	Session 2 - Social Graph
	Analysing Information Flows and Key Mediators through Temporal Centrality Metrics John Tang1, Mirco Musolesi3, Cecilia Mascolo1, Vito Latora2 and Vincenzo Nicosia2 University of Cambridge1, University of Catania2, University of St. Andrews3
15:00-15:15	coffee
15:15-16:45	Session 3 - Distributed Solution
	On Managing Social Data for Enabling Socially-Aware Applications and ServicesPaul Anderson, Nicolas Kourtellis, Joshua Finnis and Adriana Iamnitchi (University of South Florida)
	A Self-Organising Directory and Matching Ser vice for Opportunistic Social Networking Sonia Ben Mokhtar1, Afra J. Mashhadi2, Liam Mc Namara3 and Licia Capra2 (LIRIS-CNRS1, UCL2, University of Cambridge3)
	A First Step Towards User Assisted Online Social Networks Kryczka1, Rubén Cuevas22, Carmen Guerrero2, Eiko Yoneki3 and Arturo Azcorra2 (IMDEA Networks1, Univ. Carlos III de Madrid2, University of Cambridge3)
16:45 -17:00	Discussion & Wrapup