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Lecture 1Jan 06, 2010

Outline

Course logisticsIntroducing tools to be used in the courseOverview of Social Web and Web 2.0

DefinitionHistoryKey elementsExample applications

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LinkedIn

Social networkingUser Interaction

Creating and Sharing of contentPurpose

About You

URL: www.linkedin.com

Wordpress Blog

WeblogSoftware tools allowingeasy creation of a website

PurposePersonal learning journal:Readings, seminars,thoughts

URL:

www.wordpress.com

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Wiki

Collaborativedevelopment of awebsitePurpose

Summary of lecturepresentations

Sample wikihttp://ir.exp.sis.pitt.edu/paws_resources/

index.php/Main_Page

BibSonomy

PurposeResource sharingResearch paper sharing

URL:http://www. bibsonomy .org

Group: social_web

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CoMeT and Eventur

Sharing, tagging, social networking, trustPurpose

Post and share information about research talks and culturalevents. Engage other users.

URL http://washington.sis.pitt.edu/comet http://eventur.sis.pitt.edu

Social Web

What do you think?

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The New Web: the Web of People

http://www.veryweb.it/?page_id=27

Web 2.0

Term was introduced following the first O'Reilly MediaWeb 2.0 conference in 2004 Web 2.0 video by Tim OReilly

By September 2005, Google search for Web 2.0returned more than 9.5 million results

http://datamining.typepad.com/data_mining/2005/12/the_rise_and_ri.html

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What Web 2.0 is and what is not

Semantic web

Collection of newweb technologies

Innovative applicationsof existing

technologies

blogs, wikis, andRSS

Living Web Read-Write Web

What is Web 2.0

Web 1.0 Web 1.0

Web 2.0

Semantic Web

U s e r C e n t r i c

D a t a C

e n t r i c

Fun Video on YouTube(http://youtube.com/watch?v=XPYLn2QblNI)

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Social Web Web 2.0

Social Web of Web 2.0?

The Social Web

The social web can be described as peopleinterlinked and interacting with engaging contentin a conversational and participatory manner viathe Internet

Since social web applications are built toencourage communication between people, theytypically emphasize some combination of thefollowing social attributes:

Identity: who are you? Reputation: what do people think you stand for? Presence: where are you? Relationships: who are you connected with? who do

you trust? Groups: how do you organize your connections? Conversations: what do you discuss with others? Sharing: what content do you make available for

others to interact with

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The Social WebNext generation web

exploiting user-generated content in sophisticated and powerful way

Key Elements

What comes to your mind first when youthink about web 2.0?

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Key Elements

User-Generatedcontent

The Users Web Blogs Resources Video (YouTube)

User as a first-classparticipant,contributor, author

http://www.masternewmedia.org/news/2006/12/01/social_bookmarking_services_and_tools.htm

Famous Web 2.0 Applications

Delicious & FlickrPioneered the concept of folksonomy

Collaborative categorization using freely chosenkeywords (tags)

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Podcasting

iPod + BroadcastA collection of digital media files which is

distributed over the Internet using syndicationfeeds for playback on portable media playersand personal computers

Key Elements

Collective Intelligence( Wisdom of Crowds)

Critical mass of participation act asfiltering what isvaluable

The web of connections growsorganically as an

output of the collectiveactivity of all webusers

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User reviews on Amazon.com

Google PageRank algorithm

Using the link structure of the web

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Key Elements

Large valuescreated by thecommunity of users throughcollaboration

Applicationspowered by usercommunity

Stigmergy

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Famous Web 2.0 Applications

SourceForge.netPeer-production methods of open source software projects

Famous Web 2.0 Applications

WikipediaLaunched in 2001Largest and fastestgrowing, and mostpopular reference workAs of December 2007

9 million articles in253 languages2,154,000 articles in

English

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eBay

Collective activity of all its users

Cloudmark

Collaborative spam filteringAggregate the individual decisions of email users

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Key Elements

25%-40% of Amazons sales

1/5 of netflix rentals comesfrom not top 3000 movies

Long TailFirst coined by Chris Anderson (2004)

Businesses with distribution power can sell a greatervolume of otherwise hard-to-find items at smallvolumes than of popular items at large volumes.

Majority of truly relevant information availableon the web is not on the well known webservers

Key Elements

Data ReuseUsage of APIs (Application Programming

Interfaces)Mash-ups

programming on the web

High level of abstraction

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RSS Feeds, APIs and Mash-ups

Time-bar of Web 2.0

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Social Web Technologies

Intelligence that emerges from collaborationof many individuals

Social navigationNavigation towards cluster of peopleNavigation because other people have looked at

somethingFollowing footprint of others

Social SearchImproving search using the data from past users

Social Web Technologies

FolksonomyCollaborative taggingThe practice and method of collaboratively creating and managingtags to annotate and categorizecontent

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Social Web Issues

Community based Systems share manyissues, which should be addressedto produces successfulsystems Participation vs lurking Social capital Social networking Trust and reputation Privacy and presence

1

10Synthesizers

100consumers

creators

Social Web Programming

RSSReally Simple SyndicationXML based metadata contentProvides updates when the content is modified

Web services"a software system designed to support interoperable Machine to Machine

interaction over a network."SOAP

Simple Object Access ProtocolA protocol for exchanging XML-based messages over computer networks,

normally using HTTP/HTTPSAjax

Asynchronous JavaScript and XMLA group of inter-related web development techniques used for creatinginteractive web applications

Mash-upA web application that combines data from more than one source into a

single integrated tool

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Future

2.0 2.0

Reading for next class

Social Navigation1. Footprints: history-rich tools for information foraging

(http://www.citeulike.org/user/brusilovsky/article/518781)

2. Supporting Social Navigation on the World-Wide-Web(http://www.citeulike.org/user/claudioferreira/article/86730)

Social SearchSocial Information Access: The Other Side of the Social Web.

In: V. Geffert, et al. (eds.) Proceedings of SOFSEM 2008,34th International Conference on Current Trends inTheory and Practice of Computer Science, High Tatras,Slovakia, January 19-25, 2008, Springer Verlag, pp. 5-22.