6. Looking back into the past The idea of creating profiles and communicate with strangers are nothing new. Remember ICQ, IRC and MUD. What do you think have caused the sudden explosion of Social Network sites? Source: Social Network Sites: Definition, History, and Scholarship , D. Boyd and N. B. Ellison http://jcmc.indiana.edu/vol13/issue1/boyd.ellison.html
10. Example: Betweenness (1) Heather has less direct connection than Diane. (2) Heather has a “sweeter” spot in the network because she connects two groups of people. (3) Heather is a “single point of failure”. Source: http://www.orgnet.com/sna.html
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13. An Example: How FOAF works for me http://harry.hchen1.com http://harry.hchen1.com/foaf.rdf FOAF profile crawler
14. What can you say using FOAF? http://xmlns.com/foaf/spec/
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17. XFN Examples Step 1: Use “rel” tag to define how you are related to this link. Step 2: Let the world know you an XFN page Read more: http://gmpg.org/xfn/join
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27. Social Graph API demo http:// code.google.com/apis/socialgraph/docs/examples.html
![Agenda ,[object Object],[object Object],[object Object],[object Object],Source: http://en.wikipedia.org/wiki/Image:Social-network.svg](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)