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OutlineConceptTheoryVisualization
Living in the Cave
Plato’s metaphor:Mediated Communication           0 How do you know the            outside world, e.g.,            Gadhafi...
News diffusion0 News diffusion is defined as the dissemination of news from the mass media to individuals through both the...
Theory0 Two-step flow (networks, mass media)0 J-curve model (importance of news)0 Diffusion of innovations (features of ad...
Unite and Get out the Cave!        Online Citizen Journalism0 News sharing website online journalism political participa...
News sharing website (NSW)0 News sharing website (NSW) is both theoretically and practically  defined, in this paper, as t...
News aggregator0 News sharing website users not only can obtain information  from their online social networks,0 but also ...
VisualizationCase1. news diffusion on Digg     http://weblab.com.cityu.edu.hk/blog/chengjun/essay
Heat Graph of News Diffusion      http://weblab.com.cityu.edu.hk/blog/chengjun/essay
Dynamic Diffusion Process:           The rise and fall                 http://dl.dropbox.com/u/404516/digg50_pseudo-time.h...
Case 2: news diffusion of Weibo  0 http://rthk.hk/mediadigest/20110915_76_122789.html
Case 3 News Cascade of New        York Times0 http://nytlabs.com/projects/cascade.html
End0 Thank you for your attention.
Case4: Meme Tracker    http://memetracker.org/
News Aggregator:    News Sharing Website’s Direct Influence0 News aggregator is one kind of content aggregator services wh...
News Diffusion on Digg0 http://dl.dropbox.com/u/404516/AnnoTimeLine_digg50.html
Introduction to News diffusion On News Sharing Website
Introduction to News diffusion On News Sharing Website
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Introduction to News diffusion On News Sharing Website

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Introduction to News diffusion On News Sharing Website

  1. 1. OutlineConceptTheoryVisualization
  2. 2. Living in the Cave
  3. 3. Plato’s metaphor:Mediated Communication 0 How do you know the outside world, e.g., Gadhafi’s death?
  4. 4. News diffusion0 News diffusion is defined as the dissemination of news from the mass media to individuals through both the channels of mass media and interpersonal social networks.
  5. 5. Theory0 Two-step flow (networks, mass media)0 J-curve model (importance of news)0 Diffusion of innovations (features of adopters)0 Threshold models (social influence)0 Epidemics models(Becker, 1992) (Information cascade, social contagion)0 Don’t forget that we are living in the “cave”!
  6. 6. Unite and Get out the Cave! Online Citizen Journalism0 News sharing website online journalism political participation  democracy.0 NSW users diffuse news stories by recommendations to collaboratively filter and redistribute news0 ‘Citizen journalism’ refers to a range of web-based practices which users engage in journalistic practices, which includes blogging, photo and video sharing, and posting eyewitness commentary about current events.0 Citizens participate in re-posting, linking, ‘tagging’ (labeling with keywords), rating, modifying or commenting upon news materials posted by other users or by professional news outlets (Goode, 2009).0 ‘Participatory journalism’ (Willis, 2003).
  7. 7. News sharing website (NSW)0 News sharing website (NSW) is both theoretically and practically defined, in this paper, as the social media on which users can submit, share, and transmit news through the underlying social networks.0 NSW is also one kind of news aggregator, which is based on the function of search engine or other information syndication technologies, to facilitate news gathering, submitting, news processing, discussing, and news transmitting. NSW Online Media 8
  8. 8. News aggregator0 News sharing website users not only can obtain information from their online social networks,0 but also get information from news aggregator directly (Lerman & Ghosh, 2010; Steeg, Ghosh, & Lerman, 2010). Trending news & Search Engine top news Social filtering 9
  9. 9. VisualizationCase1. news diffusion on Digg http://weblab.com.cityu.edu.hk/blog/chengjun/essay
  10. 10. Heat Graph of News Diffusion http://weblab.com.cityu.edu.hk/blog/chengjun/essay
  11. 11. Dynamic Diffusion Process: The rise and fall http://dl.dropbox.com/u/404516/digg50_pseudo-time.html0 digg<-read.csv(file= "d:/micro- blog/digg/digg_diffusion_data_for_gvisAnnotatedTimeL ine.csv", head=T,sep = "")0 digg50<-subset(digg, digg$news_id<=50) #Select data0 digg50$news_id<-as.character(digg50$news_id)0 library(googleVis)0 AnnoTimeLine <- gvisAnnotatedTimeLine(digg50, datevar="time",0 numvar="num_sum", idvar="news_id",0 titlevar="", annotationvar="",0 options=list(displayAnnotations=TRUE,0 legendPosition=newRow,0 width=1000, height=600)0 )0 # Display chart0 plot(AnnoTimeLine)0 setwd("d:/micro-blog/digg/")0 cat(AnnoTimeLine$html$chart, file="AnnoTimeLine_digg50.html")
  12. 12. Case 2: news diffusion of Weibo 0 http://rthk.hk/mediadigest/20110915_76_122789.html
  13. 13. Case 3 News Cascade of New York Times0 http://nytlabs.com/projects/cascade.html
  14. 14. End0 Thank you for your attention.
  15. 15. Case4: Meme Tracker http://memetracker.org/
  16. 16. News Aggregator: News Sharing Website’s Direct Influence0 News aggregator is one kind of content aggregator services which help users to find required information from a variety of information channels by gathering, organizing and processing the source information (Chowdhury & Landoni, 2006), based on the according technologies (e.g., RSS, social filtering, and search engine) . 17
  17. 17. News Diffusion on Digg0 http://dl.dropbox.com/u/404516/AnnoTimeLine_digg50.html

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