Date post: | 26-Jun-2015 |
Category: |
Education |
Upload: | loseyourself |
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Did You Know?
A Video Tour of Trends
Co-evolution
Internet – A Time Line
Internet
• Computers• Ethernet• TCP/IP• Born in late 60s and early 70s• Dominant Applications– FTP– Email– Defense Use
Web 1.0• Layered On Top of Internet• Sharing Documents• Protocol – http• Format – html• Very Static (initially)• Evolution– Dynamic Content– Data Driven
• Became mainstream with browser and Server development (both open source)
Web 2.0 Tag Cloud
Web 2.0 Apps
• Blogs ( Wordpress, Blogger)• Wikis (Wikipedia, Mediawiki)• Social Networks (Facebook, Orkut, LinkedIn,
Ning)• Podcasting (iTunes)• Social Bookmarking (Delicious, StumbleUpon)• Screencasting (CommonCraft)• Video (YouTube, Vimeo)
Blogs
• A Blog is normally a single page of entries. • A blog is organized in reverse-chronological
order, • A blog is normally public -- the whole world
can see it. • A blog is written using a Web Based Editor
(can also be done using email or Word or any other authoring tool)
A Blog Page
Blog – A Mind Map
Wikis• Wiki is a short form of Wiki Wiki Web• Wiki – A collaboration tool• A knowledge repository• Multiple authors• Multiple Roles (edit, view)• Wiki Words• Wiki Links• Back Links• Built In Search• Automatic Versioning• Wiki Engines• Wikis in Plain English (Video)
Wiki Trends
Other Uses of MediaWiki Engine
Podcasting, Screen Casting And Sketch Casting
• Podcasting– (iTunes)
• Screen Casting– Camtasia
• Sketch Casting – Video
Micro Blogging - Twitter
• Tweets• Re-Tweets• Twitter-Lists• Followers• Friends• Trends• Twitter-Search• Why is Twitter So Popular?
Mashups
• A way to flexibly combine applications• Build custom applications in hours and days• Introduction to Mashups (Video)• Resources:– Programmable Web– Mashup Unconference– Enterprise Mashups
RSS and Atom Feeds
• An XML based format for syndicating content• Blogs• News Feeds• Feed Readers– Google Reader
• Feed Search Engines• Feed Aggregators• RSS in Plain English (video)
A Sample RSS Feed
Social Media
• Social Media (Video)• Social Networks (Video)• Twitter – A micro-blogging service (video)• Blogs (Video)
The Semantic Web
• Parallax Demo (video) - http://www.freebase.com/labs/parallax/index.html/
• Semantic Web (Video)• RDF Tutorial (video)
An Example
@prefix : <http://www.example.org/> . :john a :Person . :john :hasMother :susan . :john :hasFather :richard . :richard :hasBrother :luke .
http://www.rdfabout.net/intro/?section=contents
Semantic Web Concepts
• RDF – Resource Description Framework• Expresses semantics in triples• A web page consists of a set of RDF
statements• RDF can be embedded in web pages using
RDFa• SPARQL allows you to query web as a
database
RDF, RDFS, OWL
• Just like databases have a schema, RDF has a schema language called RDFS
• OWL is a Ontology Web Language to provide a more powerful description of resources and their valid relationships
• Different websites can share common vocabularies to refer to similar objects
Some Sample Vocabularies
• FOAF – Friend of a Friend• BIO - A vocabulary for biographical
information• Dublin Core – Author meta data• GEO - A vocabulary for representing latitude,
longitude and altitude information• More info at:– http://www.schemaweb.info/
Future Directions in Learning
• MIT Sketchboard• Siftables