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2 December 2005 
Web Information Systems 
Web 2.0 Basics 
Prof. Beat Signer 
Department of Computer Science 
Vrije Univers...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 2 
Web 2.0 
 The term Web 2.0 was 
intr...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 3 
Main Web 2.0 Ingredients 
 Social We...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 4 
Web 2.0 Interaction 
Service-oriented...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 5 
Web 1.0 vs. Web 2.0 
Web 1.0 Web 2.0 ...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 6 
Web 2.0 and the Long Tail 
 The term...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 7 
Video: The Machine is Us/ing Us
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 8 
Web 2.0 Examples 
 Wikis 
 Blogs 
...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 9 
Wikis 
 The first wiki was the 
Wiki...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 10 
Wikipedia 
 Open authoring model 
...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 11 
Blogs 
 A blog (weblog) is a 
chron...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 12 
Technorati 
 Blog search engine 
 ...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 13 
Flickr 
 Image hosting and sharing ...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 14 
Folksonomies 
 Folksonomy = 'folk' ...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 15 
YouTube 
 Video hosting and sharing...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 16 
Last.fm 
 Internet streaming radio ...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 17 
Facebook 
 Social networking site 
...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 18 
Twitter 
 Micro-blogging and social...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 19 
Second Life 
 Virtual 3-dimensional...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 20 
Academia.edu 
 Social networking we...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 21 
SlideShare 
 Social networking webs...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 22 
myExperiment 
 Collaborative enviro...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 23 
Delicious 
 Social bookmarking 
ser...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 24 
Mashups 
 A mashup composes 
inform...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 25 
Google Docs 
 Free web-based office...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 26 
Google AdSense 
 Highly customised ...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 27 
Video: The Kindness of Strangers
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 28 
Social Implications of Web 2.0 
 Da...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 29 
Common Web 2.0 Patterns 
 The prese...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 30 
Exercise 6 
 Web Services
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 31 
References 
 James Governor et al.,...
November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 32 
References 
 James Surowiecki, The ...
2 December 2005 
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Web 2.0 Patterns and Technologies
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Web 2.0 Basics - Lecture 06 - Web Information Systems (4011474FNR)

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This lecture is part of a Web Information Systems course given at the Vrije Universiteit Brussel.

Publicada em: Educação, Tecnologia
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Web 2.0 Basics - Lecture 06 - Web Information Systems (4011474FNR)

  1. 1. 2 December 2005 Web Information Systems Web 2.0 Basics Prof. Beat Signer Department of Computer Science Vrije Universiteit Brussel http://www.beatsigner.com
  2. 2. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 2 Web 2.0  The term Web 2.0 was introduced by Tim O'Reilly at the Web 2.0 conference in 2004 to describe a new generation of web apps  user-generated content  data as a driving force - infoware rather than simply software  collective intelligence via social resource and knowledge sharing  the Web as a platform for software applications  Not a new technology but a change in how developers and users build applications on the Web  user-generated content already existed earlier (e.g. Amazon) [http://en.wikipedia.org/wiki/File:Web_2.0_Map.svg]
  3. 3. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 3 Main Web 2.0 Ingredients  Social Web  end user as a participant and content creator  democracy  Rich Internet Applications (RIAs)  bring the desktop to the browser  highly interactive applications (e.g. with drag and drop)  based on AJAX, Flash, etc.  Service Oriented Architectures (SOAs)  enable the sharing of information and services between different Web 2.0 applications  Web Services, RSS, mashups, etc.
  4. 4. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 4 Web 2.0 Interaction Service-oriented Architecture (SOA) information access content creation user-to-user interaction Web collective intelligence
  5. 5. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 5 Web 1.0 vs. Web 2.0 Web 1.0 Web 2.0 publishing participation reading reading and writing (participatory Web) content management systems wikis personal homepages blogs simple request/response interaction Rich Internet Application (RIA) screen scraping (extract data from HTML) service-oriented architectures taxonomies (classification) folksonomies (tagging) companies communities single user social networks bookmarking collaborative tagging / social bookmarking ... ...
  6. 6. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 6 Web 2.0 and the Long Tail  The term long tail has been introduced by Chris Anderson in 2004  article about Amazon etc. - 'Touching the Void' and 'Into Thin Air' example  Main observations  the tail is longer than expected and now economically within reach  the niches form a significant market when aggregated  new economic model: combine infinite shelf space with shared real-time public opinions and buying trends  Major part of Internet content made up by small sites  provide tools to address the long tail and not just the head Joe Simpson, 1988 Jon Krakauer, 1997
  7. 7. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 7 Video: The Machine is Us/ing Us
  8. 8. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 8 Web 2.0 Examples  Wikis  Blogs  Media sharing sites  Folksonomies  Social networking sites  Web-based communities  Mashups  Web applications  ...
  9. 9. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 9 Wikis  The first wiki was the WikiWikiWeb in 1995  Ward Cunningham  inspired by HyperCard  Any user can create new wiki pages or edit existing pages  no special software required on the client side (only a browser)  Democracy-based control of the content  revision history, discussion, ...  Various wiki software  MediaWiki, DokuWiki, ...
  10. 10. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 10 Wikipedia  Open authoring model  registered and anonymous users may contribute  some users (editors) have special rights  Each article has  a history page showing all of its changes  a discussion page  Issues  reliability not guaranteed since no central authority  vandalism  ...
  11. 11. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 11 Blogs  A blog (weblog) is a chronologically ordered list of information  personal diary  specific subjects - e.g. celebrities  Tool for delivering news and getting in touch with a large community of users  nowadays often used as a powerful channel in politics  much harder to control than print or broadcasting media  Popular blogs often generate revenue by advertising  access to content is often free
  12. 12. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 12 Technorati  Blog search engine  indexes over 100 million blogs  Use tags to classify blogs  Ranking based on a blog's authority  number of inlinks from other blogs  similar to search algorithms descibed later
  13. 13. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 13 Flickr  Image hosting and sharing website  Image repository that is often used by bloggers  Managing images  collaborative tagging - user-generated taxonomy (folksonomy) - one of the first websites that implemented tag clouds  grouping in sets, collections and higher order collections - note that an image may be added to multiple sets  Offers a powerful Web Service API  can easily be integrated with third-party applications
  14. 14. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 14 Folksonomies  Folksonomy = 'folk' + 'taxonomy'  user-generated taxonomy  Social tagging  collaboratively creating and managing tags  bottom up approach - no fixed terminology  Applications  Annotea: shared Web annotations and bookmarks  Delicious: social bookmarking web service  Tag cloud visualisation
  15. 15. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 15 YouTube  Video hosting and sharing website  Social impact  YouTube Internet celebrities  Copyright issues  material from TV shows etc.  many broadcasting companies use YouTube as new channel  Content can easily be embedded in external websites  blogs, social networking sites, ...  Acquired by Google in 2006
  16. 16. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 16 Last.fm  Internet streaming radio  User profile based on music listened to on Last.fm and other devices  Audioscrobbler music recommender system  based on collaborative filterling algorithm  find songs in the "neighbourhood" based on other users with similar tastes
  17. 17. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 17 Facebook  Social networking site  Connect to friends and share information  info about current status  post messages on a user's public wall  send individual messages  share photos  Easy to add individual applications  Copyright issues  what happens with content that has been uploaded to Facebook?  Privacy issues
  18. 18. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 18 Twitter  Micro-blogging and social networking service  Small messages (tweets) can be posted to a user profile  often added via SMS  reach millions of users from any place around the world within seconds - used in protests and politics, emergencies, ...  Can we get too connected?
  19. 19. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 19 Second Life  Virtual 3-dimensional world by Linden Lab  special client software  User represented by an avatar  Linden dollar (L$) as a currency  buy land  buy and sell goods and services to other users  Applications  education, business meetings, arts, ...
  20. 20. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 20 Academia.edu  Social networking website for researchers  Sharing and rating of resources  research papers, conference presentations, CVs, etc.  Find researchers with similar research interests  Other professional social networking websites  LinkedIn, Xing, ...  How to deal with profile information on different sites?  open standards for social networking
  21. 21. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 21 SlideShare  Social networking website to share presentations  High quality educational material  Various APIs for inte-gration with other social networking websites  Content may spread virally through social networks and blogs
  22. 22. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 22 myExperiment  Collaborative environment for scientists  Safely publish workflow plans and share them with other scientists  Reuse and repurpose workflows  avoid to reinvent the wheel  get credits for workflows  ...
  23. 23. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 23 Delicious  Social bookmarking service  store bookmarks and access them from different browsers  share and discover book-marks  Non-hierarchical classi-fication based on tags  Offers various APIs to access the bookmarks
  24. 24. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 24 Mashups  A mashup composes information and services from external sources and offers them as part of a new service  Various mashup tools  Yahoo Pipes, ...  Mashup example  composition of Google Maps and realtime information about the position of airplanes - http://www.flightradar24.com
  25. 25. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 25 Google Docs  Free web-based office tools  word processor, spreadsheet application, ...  Mobile access via mobile phone  Software as a service (SaaS)  Data safety and privacy issues
  26. 26. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 26 Google AdSense  Highly customised delivery of advertisements  shows advertisements delive-red via Google AdWords  New models for payment  pay-per-click in addition to pay-per-impression  Any website owner can enroll  sometimes very complementary information - e.g. blog with reviews about specific products together with Google advertisements for these products
  27. 27. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 27 Video: The Kindness of Strangers
  28. 28. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 28 Social Implications of Web 2.0  Data ownership and copyright issues  Collective intelligence (wisdom of crowds)  Shift of power from controlled media to collaborative communities  New models for crediting an individual's content that is accessed by other users or composed in mashup applications  Everybody has a (big) voice  e.g. reach millions of users within seconds via Twitter
  29. 29. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 29 Common Web 2.0 Patterns  The presented Web 2.0 applications have some common underlying patterns which are going to be discussed in the next lecture  service oriented architectures (SOAs)  software as a service  asynchronous partial updates - Rich Internet Applications (RIAs)  mashups  self-organising communities  collaborative tagging  viral marketing  ...
  30. 30. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 30 Exercise 6  Web Services
  31. 31. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 31 References  James Governor et al., Web 2.0 Architectures, O'Reilly Media, May 2009  Chris Anderson, The Long Tail, Wired 12(10), 2004  http://www.wired.com/wired/archive/12.10/tail.html  Michael Wesch, The Machine is Us/ing Us  http://www.youtube.com/watch?v=NLlGopyXT_g  Jonathan Zittrain, The Kindness of Strangers, TEDGlobal 2009, Oxford, UK, July 2009  http://www.ted.com/talks/lang/eng/jonathan_zittrain_t he_web_is_a_random_act_of_kindness.html  Live Flight Tracker  http://www.flightradar24.com
  32. 32. November 7, 2014 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 32 References  James Surowiecki, The Wisdom of Crowds, Anchor, August 2005
  33. 33. 2 December 2005 Next Lecture Web 2.0 Patterns and Technologies

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