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Signal versus noise
 

Signal versus noise

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Presentation for the Society of American Archaeology 2011 Annual Meeting session on 'Blogging Archaeology"

Presentation for the Society of American Archaeology 2011 Annual Meeting session on 'Blogging Archaeology"

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Signal versus noise Signal versus noise Presentation Transcript

  • Signal versus Noise
    Why Academic Blogging Matters:
    A structural argument
    Shawn Graham, RPA
    Department of History,
    Carleton University
    @electricarchaeo
    Image CC Paul Keller
  • Omniadisce; posteavidebisnihilessesuperfluum
    Father Leonard Boyle, http://www.pims.ca/academics/boyle.html
    Hugh of St Victor teaching three monks From De ArcaMorali (13th Century) Ms. Laud. Misc. 409, f° 3v. The Bodeleian Library, Oxford
  • Size of the Internet
    Carpenter, Brian. Observed Relationships between Size Measures of the Internet or Is the Internet really just a star network after all? 6.
  • Wayback Machine, Showing Yahoo on October 20 1996
  • Pagerank, according to Wikipedia
    Mathematical PageRanks (out of 100) for a simple network (PageRanks reported by Google are rescaled logarithmically). Page C has a higher PageRank than Page E, even though it has fewer links to it; the link it has is of a much higher value. A web surfer who chooses a random link on every page (but with 15% likelihood jumps to a random page on the whole web) is going to be on Page E for 8.1% of the time. (The 15% likelihood of jumping to an arbitrary page corresponds to a damping factor of 85%.) Without damping, all web surfers would eventually end up on Pages A, B, or C, and all other pages would have PageRank zero. Page A is assumed to link to all pages in the web, because it has no outgoing links.
    http://en.wikipedia.org/wiki/PageRank
  • Needle in a Haystack,the finding thereof.
    Image cc Graham Horn
  • Teaching the Machine
    Image CC Derrick Bostrom
  • Segal, David. 2010 ‘A Bully Finds a Pulpit on the Web’. The New York Times, Nov. 26.
  • Understanding our signals
    The web of responses to Colleen’s Week 2 of the ‘Blogging Archaeology’ carnival
  • Noise
    Results of search, ‘Blogging Archaeology’ on Google.com (not a phrase-search), April 1 2010. After 20 minutes, nodes=8532, edges=8949
  • Network stats:
    Diameter: 8
    Average Path Length: 3
    Filter the network so that only nodes with > 30 connections appear, reduces the graph to ~1.5 % of the nodes, and 10% of all the connections
    Leaves us with 4 communities, per modularity detection.
  • Signal
    The archaeological blogosphere: green
    The cloud: light blue (Google, Amazon, Youtube,)
    Social Media: Purple (Facebook, Twitter; also online newspapers)
    News aggregators: Red (news.google.com)
    Turns out, Colleen is the center of the world. Size of node = betweeness centrality
  • “Roman Archaeology” on the internet
  • Network Stats
    Diameter: 10
    Average Path Length: 6
    Filter the network so that only nodes with > 30 connections appear, reduces the graph to ~3 % of the nodes, and 23% of all the connections
    Leaves us with 9 communities, per modularity detection.
    Results of search, “Roman Archaeology” on Google.com, April 1 2010. After 20 minutes, nodes=6240, edges=13 216
  • Signal.
    Academia
    Blogs & Twitter
    Wikipedia
    Google & News sites
    Size of node = betweeness centrality
  • Reference links
    Carpenter, Brian. 2010. Observed Relationships between Size Measures of the Internet or Is the Internet really just a star network after all?. http://bit.ly/dUjL89 [April 1 2010]
    Gephi.org. 2010. Gephi, an open source graph visualization and manipulation software. http://gephi.org [April 1 2010]
    Jacomy, M. P. Girard, A. Delanoe. Navicrawler 1.7.3http://bit.ly/eUqTuR [April 1 2010]
    “Leonard Boyle” http://en.wikipedia.org/wiki/Leonard_Boyle [April 1 2010]
    Levy, Steve. 2010. ‘How Google’s Algorithm Rules the Web’ Wired March. http://bit.ly/9Pg9W8 [April 1 2010]
    Segal, David. 2010 ‘A Bully Finds a Pulpit on the Web’. The New York Times, Nov. 26. http://nyti.ms/hR7Iqy [April 1 2010]
    Singhal, Amit. 2010 .“Official Google Blog: Being bad to your customers is bad for business” Dec. 1. http://bit.ly/hsoRaX [April 1 2010]
    “PageRank” http://en.wikipedia.org/wiki/PageRank [April 1 2010]