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Monthly Archives: July 2015

The Strength of the Strongest Ties in Collaborative Problem Solving

Complex problem solving in science, engineering, and business has become a highly collaborative endeavor. Teams of scientists or engineers collaborate on projects using their social networks to gather new ideas and feedback. Here we bridge the literature on team performance and information networks by studying teams’ problem solving abilities as a function of both their within-team networks and their members’ extended networks. We show that, while an assigned team’s performance is strongly correlated with its networks of expressive and instrumental ties, only the strongest ties in both networks have an effect on performance. Both networks of strong ties explain more of the variance than other factors, such as measured or self-evaluated technical competencies, or the personalities of the team members. In fact, the inclusion of the network of strong ties renders these factors non-significant in the statistical analysis. Our results have consequences for the organization of teams of scientists, engineers, and other knowledge workers tackling today’s most complex problems.

A Trust-Based Privacy-Preserving Friend Recommendation Scheme for Online Social Networks

Online social networks (OSNs), which attract thousands of million people to use everyday, greatly extend OSN users’ social circles by friend recommendations. OSN users’ existing social relationship can be characterized as 1-hop trust relationship, and further establish a multi-hop trust chain during the recommendation process. As the same as what people usually experience in the daily life, the social relationship in cyberspaces are potentially formed by OSN users’ shared attributes, e.g., colleagues, family members, or classmates, which indicates the attribute-based recommendation process would lead to more fine-grained social relationships between strangers. Unfortunately, privacy concerns raised in the recommendation process impede the expansion of OSN users’ friend circle. Some OSN users refuse to disclose their identities and their friends’ information to the public domain.

In this paper, we propose a trust-based privacy-preserving friend recommendation scheme for OSNs, where OSN users apply their attributes to find matched friends, and establish social relationships with strangers via a multi-hop trust chain. Based on trace-driven experimental results and security analysis, we have shown the feasibility and privacy preservation of our proposed scheme.

1st International Conference on Social Networking and Computing

Welcome to the 1st International Conference on Social Networking and Computing (MIC-Social 2015). This event is intended to represent a major forum for researchers, engineers and students from all over the world to meet in Milan to present their latest research results and to exchange new ideas and practical experience in the following major areas:
SNMA: Social Network Models and Architectures
SNTA: Social Networking Techniques and Applications
SNIP: Social Network Information Processing
SNSP: Social Network Security and Privacy
SNME: Social Network Management and Economics

First International Workshop on Social Sensing (SocialSens 2015)

Social sensing has emerged as a new paradigm for collecting sensory measurements by means of “crowd-sourcing” sensory data collection tasks to a human population. Humans can act as sensor carriers (e.g., carrying GPS devices that share location data), sensor operators (e.g., taking pictures with smart phones), or as sensors themselves (e.g., sharing their observations on Twitter). The proliferation of sensors in the possession of the average individual, together with the popularity of social networks that allow massive information dissemination, heralds an era of social sensing that brings about new research challenges and opportunities in this emerging field.

2nd IEEE WiMob 2015 Workshop on Dynamic Social Networks

Online Social networks (OSNs) are one of the latest revolutions that have taken the world by storm; they are so popular nowadays that people want to use them anytime and everywhere through heterogeneous devices in order to facilitate human interaction as well as creating professional relationships. Their use within vehicles has attracted many companies to develop and to integrate basic social features to navigation applications and services.