I'm spending the day at the Centre for Communication and Computing at the University of Copenhagen, where Klaus Bruhn Jensen has brought together a bunch of AoIR folks, including myself, for a one-day symposium called "Digital Data - Lost, Found and Made". I'll be speaking about our Twitter research in the afternoon.

Klaus begins by noting that there are three degrees of media: humans as media, the mass media, and network media - and our understanding of media and their flows has changed considerably over the years. From the two-step flow model we've now moved to the three …