Transcript L1-Fall_2_2009 - Department of Systems and Computer

Social Networking
Lecture 1
Introduction
Learning in Retirement
Carleton University
Fall 2009
Fluttering?
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My name is David Coll
– Professor Emeritus
• Systems and Computer Engineering at
Carleton University.
– Communication and Computer Systems
• Theory, technology, applications, and
impact.
[email protected]
http://www.sce.carleton.ca/faculty/coll.html
613-225-4229
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• The subject of these lectures is
“web-based” Social Networking
• A remarkable phenomenon
• Almost one-sixth of the world’s
population has engaged in webbased activities
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• Describe the nature and extent of
popular Social Networks
• Give some background on the origins of
the Internet, the Web and Social
Networking
• Consider the set-up of a course social
network group
• We’ll look at the concerns that the
phenomenon has created
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Social Networks
And
Social Networking
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According to Wikipedia
“A social network is a social structure
made of individuals (or organizations)
which are connected by one or more
specific types of interdependency, such
as friendship, kinship, financial
exchange, dislike, sexual relationships,
or relationships of beliefs, knowledge or
prestige.”
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We are talking about Social Networks
that are implemented on the World
Wide Web,
i.e., a Social Network Service
described on Wikipedia as:
“A social network service focuses on
building online communities of people
who share interests and/or activities,
or who are interested in exploring the
interests and activities of others”.
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Social networking is
the use of a social network.
and
we’ll be discussing
web-based Social Networks
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Origin of Social Networks
• Internet
– emails (smtp) and file transfers (ftp);
– program sharing;
– Bulletin Boards, chat rooms
• Web
– Postings to web sites
– Search engines
– Opinions on blogs, communities
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Most Popular Websites 2009-09-16
http://mostpopularwebsites.net/
1 Google
2 Yahoo
3 Youtube
4 Live
5 Facebook
6 MSN
7 Wikipedia
8 Blogger
9 Myspace
10 Yahoo (Japan)
Social Networks are
among the most popular of
all web sites
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• Some popular social network services
are:
– Facebook widely used worldwide;
– MySpace, Twitter and LinkedIn being the most
widely used in North America,
– Nexopia (mostly in Canada),
– Bebo, Hi5, StudiVZ (mostly in Germany),
– Decayenne, Tagged, XING, Badoo and Skyrock
in parts of Europe; Orkut and Hi5 in South
America and Central America; and
– Friendster, Multiply, Rut, Wretch, Xiaonei and
Cyworld in Asia and the Pacific Islands.
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http://blog.compete.com/2
009/02/09/facebookmyspace-twitter-socialnetwork/
13
Facebook
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Internet Users
• As of June 30, 2009 IWS estimates that
there are 1.7 billion people who have the
capacity to use the Internet to access
information, conduct business, and to
communicate with friends or the world at
large.
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WORLD INTERNET USAGE AND POPULATION STATISTICS
Users
% of
Table
Africa
991,002,342
4,514,400
65,903,900
6.7 %
1,359.9 %
3.9 %
3,808,070,503
114,304,000
704,213,930
18.5 %
516.1 %
42.2 %
Europe
803,850,858
105,096,093
402,380,474
50.1 %
282.9 %
24.2 %
Middle East
202,687,005
3,284,800
47,964,146
23.7 %
1,360.2 %
2.9 %
North
America
340,831,831
108,096,800
251,735,500
73.9 %
132.9 %
15.1 %
Latin
America
586,662,468
18,068,919
175,834,439
30.0 %
873.1 %
10.5 %
Oceania /
Australia
34,700,201
7,620,480
20,838,019
60.1 %
173.4 %
1.2 %
6,767,805,208
360,985,492
1,668,870,408
24.7 %
362.3 %
100.0 %
WORLD
TOTAL
Internet Users
Latest Data
Users
Growth
2000-2009
Population
( 2009 Est.)
Asia
Internet Users
Dec. 31, 2000
Penetration
(%
Population)
World Regions
NOTES: (1) Internet Usage and World Population Statistics are for June 30, 2009. (2) CLICK on each world region name for detailed regional usage
information. (3) Demographic (Population) numbers are based on data from the US Census Bureau . (4) Internet usage information comes from data published
by Nielsen Online, by the International Telecommunications Union, by GfK local Regulators and other reliable sources. (5) For definitions, disclaimer, and
navigation help, please refer to the Site Surfing Guide. (6) Information in this site may be cited, giving the due credit to www.internetworldstats.com. Copyright ©
2001 - 2009, Miniwatts Marketing Group. All rights reserved worldwide.
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Social Media Categories
http://traffikd.com/social-media-websites/
Arts, Bookmarking, Cars and Auto, Connecting with
Friends, Consumer Reviews, Cooking/Food,
Cultures/Foreign Language, Dating,
Education/Books, Event Planning, Family,
Fashion/Clothing, Finance, Games, General
Networking, Health/Medical, Internet Marketing,
Link/Website Sharing, Microblogging/IM/Mobile,
Movies, Music, News, Pets, Photo Sharing, Politics,
Pop Culture, Professional, Real Estate, Religious,
Shopping, Social Action, Sports, Technology, Teen,
Travel, Video Sharing, Women, Miscellaneous
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Concerns
• Content
– Age-appropriate material, pornography
• Reliability
– Accuracy, timeliness, truth, trust-worthiness,
• Privacy
– identity theft, fraud, luring, invasion of public
space
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More concerns
• Security
– malware: viruses, worms, trojan horses,
backdoors, keystroke loggers, or spyware.
• Obsession
– time consumption, isolation
• Plagiarism/Copyright
– A major concern for education and business
– Intellectual property
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Benefits
• Yes, there are benefits
–For individuals
–For communities and institutions
–For business
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Social Networking
Lecture 2
Backround
Learning in Retirement
Carleton University
Fall 2009
This is a time of incredible
technological and scientific
development.
Nowhere has that development been
more profound than in our ability to
acquire, process, and communicate
information.
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We have gone from
AM Radio to HDTV
From hand-cranked adding machines
to handheld computers with the
power of a university mainframe of
the 1980’s.
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From black, wired, rotary-dialed
telephones to
colored, hand-held, broadband
wireless smart phones
with touch sensitive screens, Internet
access, MP3 players, video cameras,
keyboards, GPS, PDA functions, and
countless “apps”.
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And, we’ve gone all the way from
10-word telegrams
to 140 character tweets.
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• Lecture 2
– Evolution of Technology
– Popular Social Networks
• Lecture 3
– Creating a Social Network
• Lecture 4
– Categories of Social Networks
• Lecture 5
– Benefits and Concerns
• Lecture 6
– The Future of Social Networking and other
Communications Enabled Applications
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The Youth Ball Welcomes Obama with a Sea of Digital Cameras
January 22, 2009
We may think that we live in the
Information Age
That we are overloaded with new,
startling, confusing but sometime
useful services, but …
The utopian promises of ‘modern’
communications have been with us,
and affecting our lives, for a long,
long time.
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Here’s a quote from “The History of the Telephone”
by W. D. Casson
“So entirely has the telephone
outgrown the ridicule with which,
as many people can well remember,
it was first received,
that it is now in most places taken for
granted, as though it were a part of
the natural phenomena of this planet”.
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“It has so marvellously extended the
facilities of conversation
that "art in which a man has all
mankind for competitors"
that it is now an indispensable help to
whoever would live the convenient
life”.
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“The disadvantage of being deaf and
dumb to all absent persons,
which was universal in pre-telephonic
days, has now happily been
overcome”
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“The History of the Telephone”
was published
in 1910!
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Evolution
Getting to Where We Are
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We live in a digital world
Information is represented by a
collection of numbers
and that information may be
communicated in digital format to
virtually anyone, at any time,
anywhere on earth or beyond.
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The ability to
create, store, retrieve, manipulate,
distribute and display
that information,
by programmable machines,
continues to stretch the bounds of
belief.
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This is a world in which
global telecommunications networks,
multimedia broadcast networks, and
computer networks
utilize common standards
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Where all aspects of daily life that
involve information: commerce,
transportation, reservations,
education, medicine, research,
banking, supply chain management,
government operations, …
are facilitated by computers.
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Linked by worldwide communications
networks
All with common software standards!
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AND
millions of users
create thousands
of new applications
daily
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Today’s digital communication networks
are linked together under the control
of a set of inter-networking rules, or
protocols, into a system called
“The
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Internet”.
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The Internet provides for:
access to remote computers,
information interchange
(file transfers),
and
electronic mail, or “email”.
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The Internet also provides for the
linkage
of specially formatted documents
residing on different computers.
These documents are called
“hypertext” documents.
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• The linkage is through hyperlinks.
• A hyperlink is an activated spot in a
document that links to another place
in the same document or to an
entirely different document.
• Typically, you click on the hyperlink
to follow the link.
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The resulting collection
of documents is called:
The World Wide Web
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With a web browser
a user views hyperlinked pages,
or web pages,
containing text, images, and videos,
and
navigates between them using
hyperlinks.
Social Networking
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• The Web provides access to many
useful services and applications.
• For example:
–Information
• directories, dictionaries, encyclopedias,
search engines, …
–Reservations
–On-line Banking
–On-line Shopping
–Maps and Directions
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By the way …
The Web and The Internet
are not the same thing.
The Web is an application that “runs” on
the Internet
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Internet Services
The Web is only one of many services that
use the/an Internet.
Others include email
downloads of music, videos, programs and
apps
Instant Messaging (IM)
Voice Over IP (VoIP)
Video-on-Demand (VOD) …
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THE WORLD
WIDE WEB
HYPERTEXT DOCUMENTS
HTML
HTTP
THE INTERNET
TCP/IP
PROTOCOLS
DNS
PACKET-SWITCHED
NETWORKS
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Why has the Web Spread
Globally?
The availability and accessibility of
broadband, multimedia digital
communications
in all parts of the globe
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Communications with
sufficient capacity
to carry meaningful communications:
voice, images, video, and data.
Reliable communications with universal
access and
intelligent terminals.
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The communications systems,
and the terminals
that implement the applications
connected by the communications
AND
BECAUSE EVERYTHING IS “DIGITAL”
AND
UNIVERSAL STANDARDS ARE USED
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Convergence
• The convergence of telecommunication
and computer communications is a done
deal.
• Whether your connection is through cable
TV, telephone line, or wireless:
• IP technology is used to route, switch,
package and deliver the information.
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Why has the technology been
embraced, accepted and used so
dramatically?
UTILITY & VALUE
Providing information
and services
that fill needs
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