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In this paper we seek to improve our understanding of human mobility in terms of social structures, and to use these structures in the design of forwarding algorithms for Pocket Switched Networks (PSNs). Taking human mobility traces from the real world, we discover that human interaction is heterogeneous both in terms of hubs (popular individuals) and(More)
The emergence of Delay Tolerant Networks (DTNs) has culminated in a new generation of wireless networking. We focus on a type of human-to-human communication in DTNs, where human behaviour exhibits the characteristics of networks by forming a community. We show the characteristics of such networks from extensive study of real-world human connectivity(More)
Nowadays, the use of social media such as Twitter is necessary to monitor trends of people on political issues. As a case study, we collected the main stream of Twitter related to the 2010 UK general election during the associated period. We analyse the characteristics of the three main parties in the election. Also, we propose a simple and practical(More)
The current Online Social Networks' infrastructure is composed by thousands of servers distributed across data-centers spread over several geographical locations. These servers store <i>all</i> the users' information (profile, contacts, contents, etc). Such an infrastructure incurs high operational and maintenance costs. Furthermore, this may threaten the(More)
We report a preliminary investigation on interactions between networked social communities using the Ising model to analyze the spread of rumours. The inner opinion of a given community is forced to change through the introduction of a unique external source and we analyze how the other communities react to this change. We model two conceptual external(More)
A Delay Tolerant Network (DTN) provides content storage as a core network service across applications to deal with intermittent communication. Thus, the DTN realizes content-based networking, where messages flowing within networks are at content level, rather than at packet level and focus on information dissemination rather than on node delivery. In the(More)
The Wireless Rope is a framework to study the notion of social context and the detection of social situations by Bluetooth proximity detection with consumer devices and its effects on group dynamics. Users can interact through a GUI with members of an existing group or form a new group. Connection information is collected by stationary tracking devices and(More)
The increasing popularity of mobile computing devices has allowed for new research and application areas. Specifically, urban areas exhibit an elevated concentration of such devices, enabling potential ad-hoc cooperation and sharing of resources among citizens. Here, we argue that people, architecture and technology together provide the infrastructure for(More)