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Modern smart phones are now capable of gathering information about a user's social interactions. The authors have developed and deployed Nodobo, a suite of social sensor software for Android. Our first study group is a class of senior high school students, each using a Google Nexus One mobile phone running Nodobo, which we use to capture their device usage patterns and social interactions. We provide...
Friend of a Friend (FOAF) introductions are an effective means to grow detected social graphs in mobile applications. By detecting triadic closure in the social graph they both introduce co-present users who are not already acquainted, and improve the accuracy of the social graph. We searched for the presence of triadic closure in a real mobile social network, and tested the suitability of FOAF introductions...
An accurate method of estimating the tie strengths of mobile phone users will enable the development of socially-aware mobile applications. The strength of ties between mobile phone users can be estimated for large numbers of users by using the aggregated call duration as a proxy for tie strength. This paper investigates appropriate proxies for tie strength in a network of less than one hundred people...
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