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Pint of Science 2015 Jekyll & Hyde, Birmingham 18 May 2015 Sex, Bugs, and Mobile Phones Matt Williams University of Birmingham m.j.williams@cs.bham.ac.uk http://www.mattjw.net @voxmjw [Jean-Yves Sgro]

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[Sean Everton. 2012]

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93%adults in the UK that own a mobile phone 61% own a smart phone [Ofcom. 2014]

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vs 2015 [flickr/x1brett] 2005

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[flickr/janitors] Location – GPS Location – Cell tower Location – WiFi router Encounters – Bluetooth

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[Pew. 2015]

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[flickr/keyslibraries]

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[flickr/profilerehab]

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Stanley Milgram

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[flickr/keyslibraries]

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hubs like Mr Jacobs allow quick routes through a social network

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% people num. friends + acquaintances most people typically have 100-150 friends (inc. family)

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% people 200 followers 10 million followers 60 million followers

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# sexual partners % people [latora. 2006] Sexual partners in Burkina Faso, via interviews & surveys

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[SciAm. Barabasi & Bonabeau. 2003.] before after Hub Vaccinated Hub

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Cell tower logs... Ivory Coast: 5 million users, 2012 Senegal: 9 million users, 2013 Not only Bluetooth experiments... ...mobile phone service providers are also providing big support for research

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? [Julia Hyland]