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Web 2.0 Basics - Lecture 06 - Web Information Systems (4011474FNR)
 

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.

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

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    Web 2.0 Basics - Lecture 06 - Web Information Systems (4011474FNR) Web 2.0 Basics - Lecture 06 - Web Information Systems (4011474FNR) Presentation Transcript

    • Web Information Systems Web 2.0 Basics Prof. Beat Signer Department of Computer Science Vrije Universiteit Brussel http://www.beatsigner.com 2 December 2005
    • 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 [http://en.wikipedia.org/wiki/File:Web_2.0_Map.svg] - 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) November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 2
    • 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. November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 3
    • Web 2.0 Interaction Web information access content creation user-to-user interaction Service-oriented Architecture (SOA) collective intelligence November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 4
    • 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 ... November 7, 2013 ... Beat Signer - Department of Computer Science - bsigner@vub.ac.be 5
    • Web 2.0 and the Long Tail  The term long tail has been introduced by Chris Anderson in 2004  article about Amazon etc. Joe Simpson, 1988 Jon Krakauer, 1997 - '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 November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 6
    • Video: The Machine is Us/ing Us November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 7
    • Web 2.0 Examples          Wikis Blogs Media sharing sites Folksonomies Social networking sites Web-based communities Mashups Web applications ... November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 8
    • 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, ... November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 9
    • 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 ... November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 10
    • 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 November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 11
    • 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 November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 12
    • 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 November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 13
    • 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 November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 14
    • 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 November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 15
    • 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 November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 16
    • 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 November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 17
    • 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? November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 18
    • 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, ... November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 19
    • 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 November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 20
    • SlideShare  Social networking website to share presentations  High quality educational material  Various APIs for integration with other social networking websites  Content may spread virally through social networks and blogs November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 21
    • 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 ... November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 22
    • Delicious  Social bookmarking service   store bookmarks and access them from different browsers share and discover bookmarks  Non-hierarchical classification based on tags  Offers various APIs to access the bookmarks November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 23
    • 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 November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 24
    • 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 November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 25
    • Google AdSense  Highly customised delivery of advertisements  shows advertisements delivered 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 November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 26
    • Video: The Kindness of Strangers November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 27
    • 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 November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 28
    • 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 ... November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 29
    • Exercise 6  Web Services November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 30
    • 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 November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 31
    • References  James Surowiecki, The Wisdom of Crowds, Anchor, August 2005 November 7, 2013 Beat Signer - Department of Computer Science - bsigner@vub.ac.be 32
    • Next Lecture Web 2.0 Patterns and Technologies 2 December 2005