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Social networks: technical issues
The document discusses the evolution of the internet from Web 1.0 to Web 2.0, detailing the shift from passive publishing to interactive participation and the emergence of social networks and collaborative tools. It also explores technical advancements such as the Semantic Web and syndication, highlighting their impact on online identity and communication. Additionally, it emphasizes the importance of being cautious with personal information shared online and the role of social networks in personal and professional branding.
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Social networks: technical issues
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- 2. Be aware ofwhat goes public
- 3. Be aware ofwhat goes public
- 4. Be aware ofwhat goes public
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- 12. Different networks, differentusages From: http://www.fabernovel.com/news/research-paper-social-network-websites
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- 17. Technical issues ofsocial Internet
- 18. Web 2.0 • Webapplications that facilitate interactive information sharing, interoperability, user-centered design and collaboration • Websites mimic desktop applications: word processing, spreadsheet, slide- show presentations • Asynchronous communications: To permit the user to continue to interact with the page, communications such as data requests going to the server are separated from data coming back to the page
- 19. Web 2.0 • Takesprofit from the capabilities of: • Client- and server-side software • Content syndication • Use of network protocols • Client and server side technologies: Asynchronous JavaScript and XML (Ajax) • Server side technologie: PHP, Ruby, ColdFusion, Perl, Python, and ASP
- 20. Some Web 2.0applications • http://www.netvibes.com • http://www.meebo.com/ • http://docs.google.com • http://www.zimbra.com/ • http://www.facebook.com
- 21. Web 1.0 vsWeb 2.0 • publishing --> participation • directories (taxonomy) --> tagging ("folksonomy") • personal websites --> blogging • domain name speculation --> search engine optimization • page views --> cost per click • content management systems --> wikis • Britannica Online --> Wikipedia • Source : http://oreilly.com/web2/archive/what-is-web-20.html
- 22. Web 2.0 • Pros: • Interactive web applications • Recommendations between users • Collaborative spaces • Cons: • Is it really a technical revolution? • Creating a Web 2.0 company just to sell it to Yahoo, Google or Microsoft? • Accessibility
- 23. Semantic web • Evolvingdevelopment of the Internet supported by W3C • Emphasizes on the meaning (semantics) of information and services on the web is defined, making it possible for the web to "understand" and satisfy the requests of people and machines to use the web content • Help computers categorise the content of web pages so that machines process similar to human deductive reasoning and inference • Aim: make the information be understandable by computers, so that they can find, combine, and act upon information on the web
- 24. Semantic web • Involvespublishing in languages specifically designed for data: Resource Description Framework (RDF), Web Ontology Language (OWL), and Extensible Markup Language (XML). • Very simple examples for turning the web into semantics: • <item>cat</item> --> <item rdf:about="http://dbpedia.org/resource/Cat">Cat</ item> • César said: <i>Alea jacta est.</i> --> <cite>César</cite> said : <q>Alea jacta est</q>
- 25. Semantic web From: http://en.wikipedia.org/wiki/Semantic_Web
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- 31. Syndication • Website materialis made available to multiple other sites or individual subscribers • Benefits both the websites providing information and the websites displaying it • Very useful for frequently updated content • First version of RSS created by Guha at Netscape in March 1999 for use on the My.Netscape.Com portal
- 32. Applications of syndication •News websites • Weblogs • Podcasting • Personal aggregators or feed readers
- 33. Feed readers • Displaythe contents of multiple web feeds on a single screen or series of screens • Web-based: Google Reader, Netvibes, ... • Desktop-based: NetNewsWire, Firefox, Mail, .. • Mobile-device-based: Newsstand, Pro RSS, ... • Websites aggregating content
- 34. Web feeds • StandardizedXML file format • Supported by every major web browser • Main web syndication formats: RSS and Atom
- 35. RSS • Really SimpleSyndication • Two majors branches: • RDF (or RSS 1.*) branch: RSS 0.90, 1.0, 1.1 • RSS 2.* branch: RSS 0.91-0.94, 2.0
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- 37. Atom • Developed asan alternative to RSS • Because some people thought RSS had limitations and flaws (lack of on- going innovation, necessity to remain backward compatible)
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- 39. Differences between RSSand Atom • RSS tags: • title, link, date, language, creator, subject, description, content • Atom tags: • title, link, issued, modified, id, author, subject, summary, content • Different paradigms regarding: • Content model • Date formats • Internationalization
- 40. Online identity • Beinganonymous is just an illusion • Some issues: • Identity exposure • Reliability of online identities • Reputation management
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- 46. OpenID • Method ofusing a single login at a trusted provider to automatically allow you trusted access to other websites • Open, decentralized standard for authenticating users • Can be used for access control, allowing users to log on to different services with the same digital identity where these services trust the authentication body (e.g. banking or e-commerce) • Used and provided by several large websites, e.g. Facebook, Typepad, PayPal, LiveJournal • Developped since 2005
- 47. OpenID principles • 1/The user visits a relying party web site which displays an OpenID login form (connected to an implementation of an OpenID client library) • 2/ The user types his OpenID identifier into the aforementioned OpenID login form. • 3/ The relying party then requests the identity provider to authenticate the user • 4/ The identity provider requests the user whether he trusts the relying party web site • 5/ After the OpenID identifier has been verified, OpenID authentication is considered successful • 6/ The user is now considered logged in to the relying party web site.
- 48. OpenID providers • OpenIDFoundation: http://openid.net/ • OpenID Europe Foundation: http://www.openideurope.eu/ • OpenID France: http://www.openidfrance.fr/
- 49. XFN • XHTML FriendsNetwork (XFN) • HTML microformat (i.e. approach that re-uses existing XHTML and HTML tags to convey metadata) • Provides a way to represent human relationships using links. • Enables web authors to indicate relationships to the people in their blogrolls by adding one or more keywords as the rel attribute to their links <a href="http://moreaug44.free.fr/blog/" rel="colleague met">Guillaume Moreau</a> <a href="http://jimmy.example.com/" rel="friend">Jimmy Example</a>
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- 52. FOAF With FOAF, itbecomes possible to answer questions like: “Who are the people living in Nantes and aged less than 30 with their own personal website and who enjoy playing go?”
- 53. FOAF • FOAF • SocialSemantic Web application • Machine-readable ontology describing persons, their activities and their relations to other people and objects • Descriptive vocabulary expressed using the Resource Description Framework (RDF) and the Web Ontology Language (OWL) • Natively supported by some web applications (e.g. LiveJournal.com and identi.ca)
- 54. FOAF ressources • FOAFProject homepage: http://rdfweb.org/foaf/ • FOAF vocabulary specification: http://xmlns.com/foaf/spec/
- 55. Social aspects ofInternet
- 56. • New servicesemerge from: • Existing information • Data • Services • Information and services may be used a way that has not been targeted by the initial creators • Facebook moved from an alumni network to an online community • Social dimension
- 57. Blogs • Type ofwebsite, usually maintained by an individual with regular entries of commentary, descriptions of events, or other material • 133,000,000: (June'09) number of blogs indexed by Technorati since 2002 • Classification attempts: • Personal blogs • Corporate and organizational blogs • By genre (political blogs, travel blogs, dreamlogs, ...) • By media type (vlog, linklog, sketchblog, ...)
- 58. Technical tools forblogging • Developer-hosted platforms (blog farms): • Typepad : http://www.typepad.com/fr/ • Viabloga : http://www.viabloga.com/ • Skyrock : http://www.skyblog.com/
- 59. Technical tools forblogging • User hosted platforms: • Wordpress : http://www.wordpress.org • Dotclear : http://www.dotclear.net • Movable Type : http://www.movabletype.org • Most common technologies: • PHP or Perl to manage dynamic pages • MySQL or XML to manage data
- 60. Twitter • Microblogging service •Changes blogging habits • 9,680,000,000 tweets up to date (http://popacular.com/gigatweet/) • RSS file for each Twitter account • Free social networking and microblogging service,... • But what could happen to your data (and to your URL)? • Open-source alternative: identi.ca
- 61. Wikis • Collaborative work •Continuous improvement of documents • Useful for collaborative websites, personal note taking, in corporate intranets, and in knowledge management systems • Examples: • http://pedagogie.ec-nantes.fr • http://romeo.rts-software.org/trac • http://easybindings.net
- 62. Social networks • Thefamoux “six degrees of separation” theory • Small world experiment by psychologist Stanley Milgram (in the U.S., 1967) • Social structure • Individuals (or organizations) called "nodes" • Connections by one or more specific types of interdependency: friendship, kinship, financial exchange, dislike, sexual relationships, or relationships of beliefs, knowledge or prestige
- 63. Why social networksfor companies? (and people) • Social networks are a tool to promote yourself or/and your company • Control what is said about you implies you control what you say • Editorial policy • Community manager
- 68. Various tools forvarious audiences
- 69. Forthcoming features • Growinginterconnections between web services • Social features natively integrated in new web applications • Social search engines • 3G Services • Geolocation • Management of geocoded photos by Flickr or Moblog • Local trends in Twitter • Use of geolocation information in Google Buzz
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- 71. Think “collaborative” • Shareyour information... • But be aware of who you share with... and what you share • Collaborative applications • Ensure interconnection between your web applications