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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)
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)
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)
Community is an important attribute of Pocket Switched Networks (PSNs), since mobile devices are carried by people who tend to belong to communities in their social life. We discover the heterogeneity of human interactions such as community formation from real world human mobility traces. We have introduced novel distributed community detection approaches(More)
The recent evolution of ubiquitous computing has brought with it a dramatic increase of event monitoring capabilities by wireless devices and sensors. Such systems require new, more sophisticated, event correlation over time and space. This new paradigm implies composition of events in heterogeneous network environments, where network and resource(More)