Gothenburg

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SIGSNA presentation at the ISA2010 Conference - RC51 session. Gotenburgh, Swden, July 2010-

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Gothenburg

  1. 1. SIGSNA:an empirical analysis of news propagationpath in social network sites.<br />Luca Rossi –Universityof Urbino “Carlo Bo”luca.rossi@uniurb.it<br />
  2. 2. Global phaenomenon, expressing cultural peculiarities.<br />
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  5. 5. Whatispropagation in Friendfeed?<br />
  6. 6. Local<br />Global<br />User<br />Prob. of exposition<br />Avg. audience<br />Time<br />Delay of reception<br />Avg. lifetime<br />Howwe can observepropagation?<br />
  7. 7. data<br />All public entries(post and relatedcomments)(Sept. 6–Sept. 19 2009)<br />≃ 10.500.000 posts   ≃ 500.000 likes.   ≃ 450.000 users.  ≃ 15.000.000 di archi (subs).<br />
  8. 8. case study: a propagation<br />Mike Bongiorno (famousItalian TV host) died on Sept. 8 2010.The newsappears in Friendfeed at 01.57 PM:- First entry 130 comments<br />- Allentries585 comments<br />
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  10. 10. Using timestamps and network of followers we have been able to track the propagation paths identifying major hubs.<br />
  11. 11. Short propagationchains<br />Long propagationchains<br />No propagation<br />
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  15. 15. Explicit news sharing is followed by chatting and discussion. This kind of activity contribute to news propagation<br />“<br />Bye Mike! We’re missingyou!Bye granpa Mike!<br />Mike, you’ve been a milestoneofour TV<br />”<br />- Explicit news propagation.<br />- Implicit news propagation.<br />- Mourningritualof the networked public.<br />
  16. 16. First entry has the highest informative function<br />Most commented entry is a long and articulated discussion<br />
  17. 17. Mass media system 2.0 ?<br />Friendfeed<br />Major Italian Newspapers(Il Corrieredella Sera, La Repubblica)<br />
  18. 18. Mass media system 2.0 ?<br />When the news hit the Friendfeed network only SkyTg24 wasbroadcastingit. <br />The selection code is up to the end user and hedecideswhenever a specific information is informative.<br />
  19. 19. Mass media system 2.0 ?<br />Is the evolutionof news/chat thatwehavedetectedsimilartocouple news/reportage?<br />
  20. 20. More info, papers and data:<br />http://larica.uniurb.it/sigsna<br />SIGSNA is a joint research project with the department of Computer Science of the University of Bologna (Dr. MatteoMagnani) and it is partially founded by Telecom Italia.<br />

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