Authoritative sources in a hyperlinked environment
Journal of the ACM (JACM)
Reality mining: sensing complex social systems
Personal and Ubiquitous Computing
Graph evolution: Densification and shrinking diameters
ACM Transactions on Knowledge Discovery from Data (TKDD)
The dynamics of viral marketing
ACM Transactions on the Web (TWEB)
The link-prediction problem for social networks
Journal of the American Society for Information Science and Technology
Passive data link layer 802.11 wireless device driver fingerprinting
USENIX-SS'06 Proceedings of the 15th conference on USENIX Security Symposium - Volume 15
Proceedings of the 13th annual ACM international conference on Mobile computing and networking
Connectivity structure of bipartite graphs via the KNC-plot
WSDM '08 Proceedings of the 2008 International Conference on Web Search and Data Mining
Identifying unique devices through wireless fingerprinting
WiSec '08 Proceedings of the first ACM conference on Wireless network security
Introduction to Information Retrieval
Introduction to Information Retrieval
Proceedings of the forty-first annual ACM symposium on Theory of computing
Co-evolution of social and affiliation networks
Proceedings of the 15th ACM SIGKDD international conference on Knowledge discovery and data mining
Power Law and Exponential Decay of Intercontact Times between Mobile Devices
IEEE Transactions on Mobile Computing
Language identification: the long and the short of the matter
HLT '10 Human Language Technologies: The 2010 Annual Conference of the North American Chapter of the Association for Computational Linguistics
Bridging the gap between physical location and online social networks
Proceedings of the 12th ACM international conference on Ubiquitous computing
Mapping the urban wireless landscape with Argos
Proceedings of the 8th ACM Conference on Embedded Networked Sensor Systems
Inequalities between multi-rater kappas
Advances in Data Analysis and Classification
Tracking unmodified smartphones using wi-fi monitors
Proceedings of the 10th ACM Conference on Embedded Network Sensor Systems
Microblog language identification: overcoming the limitations of short, unedited and idiomatic text
Language Resources and Evaluation
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The ever increasing ubiquitousness of WiFi access points, coupled with the diffusion of smartphones, suggest that Internet every time and everywhere will soon (if not already has) become a reality. Even in presence of 3G connectivity, our devices are built to switch automatically to WiFi networks so to improve user experience. Most of the times, this is achieved by recurrently broadcasting automatic connectivity requests (known as Probe Requests) to known access points (APs), like, e.g., "Home WiFi", "Campus WiFi", and so on. In a large gathering of people, the number of these probes can be very high. This scenario rises a natural question: "Can significant information on the social structure of a large crowd and on its socioeconomic status be inferred by looking at smartphone probes?". In this work we give a positive answer to this question. We organized a 3-months long campaign, through which we collected around 11M probes sent by more than 160K different devices. During the campaign we targeted national and international events that attracted large crowds as well as other gatherings of people. Then, we present a simple and automatic methodology to build the underlying social graph of the smartphone users, starting from their probes. We do so for each of our target events, and find that they all feature social-network properties. In addition, we show that, by looking at the probes in an event, we can learn important sociological aspects of its participants---language, vendor adoption, and so on.