1. Lada Adamic ladamic@umich.edu School of Information University of Michigan, Ann Arbor

2. Flow of knowledge in scientific (collaboration) networks Viral marketing for a new product The spread of memes The adoption of medical practices The interaction between formal and informal news channels How easily is it to locate information in these networks? How can we understand the flow of information? product recommendation network

3. Can we understand community dynamics? the political blogosphere, early 2005 can we? locate expertise identify informal communities in formal organizations detect polarization analyze discourse learn what brings communities together online