INFSCI 00102015 Summer Term

LEC3.ppt

Becoming Skilled at Information Technology

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Thought for the day

• “Finding a way to live the simple life today is man's most complicated task."-Henry A. Courtney  

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IS 0010 - Summer 2015

Tentative Schedule Week of

(Monday)

1 11-May x2 18-May x3 25-May Memorial Day (no classes)4 28-Jan x5 1-Jun6 8-Jun7 15-Jun8 22-Jun9 29-Jun Exam (date to be announced)

10 6-Jul11 13-Jul12 20-Jul Presentations (date to be announced)13 27-Jul Final work due

Current assignment summary

• Bring an INFSCI article to each class– Due: each class … (ref LEC1)

• Start reading the text– Due: before the exam … (ref LEC1)

• Watch “Code Wars” video– http://www.intellectualtakeout.org/library/video-podcast-media/video-code-wars-america%E2%80%99s-cyb

er-threat– Due: before the exam … (ref LEC1)

• Exam questions assignment– Due: one week before the exam … (ref LEC2)

• Extra articles (see slides below)– Net Neutrality due: 6/1/15– Patriot Act due: 6/8/15

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Code Wars

• Watch “Code Wars” video– http://www.intellectualtakeout.org/library/video-podcast-media/video-code-wars-america%E2%80%99s-cyb

er-threat

• Note: The prior link to Code Wars failed … try the above link.

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Extra articles

• Net Neutrality– Due 6/1/15

• Patriot Act << new– Due 6/8/15

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Assignment: Net Neutrality articles

Net neutrality article assignment:

 

Bring in two or more articles related to net neutrality. Select articles that:

 

(1) Define net neutrality.

(2) Include articles that describe key current and future events relative to the topic.

(3) Include articles that discuss the pros/cons and different viewpoints on the topic.

(4) Underline the parts of the articles that are applicable, you do not need to add any written commentary (but you can if you want to).

(5) Write NET NEUTRALITY on the top of the page

 

Notes:

 

(1) Staple your net neutrality articles together, but do not staple them to your regular weekly article.

(2) You will be given a “check mark” for completing this assignment.

(3) Submit this assignment in class in two weeks. Do not submit via email.

(4) Make a duplicate copy of your work to keep for yourself.

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Assignment: Patriot Act articles

Patriot Act article assignment:

 

Bring in one or more articles related to the Patriot Act. Consider:

 

(1) What is The Patriot Act?

(2) Include articles that describe key current events relative to the topic.

(3) Include articles that discuss the pros/cons and different viewpoints on the topic.

(4) Write PATRIOT ACT on the top of the page

(5) What is the USA F _ E _ D _ _ A _ _ ? Fill in these blanks on top of your first page

(If you can!!!)

 

Notes:

 

(1) Staple your Patriot Act articles together, but do not staple them to your regular weekly article.

(2) You will be given a “check mark” for completing this assignment.

(3) Submit this assignment in class next week. Do not submit via email.

(4) Make a duplicate copy of your work to keep for yourself (if you want a copy).

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Lecture Notes

• You now have:– LEC1.ppt, LEC2.ppt, LEC3.ppt, CH1v6.ppt,

CH2v6.ppt

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Current reading list

• Read Chapters 1,2,3,4,5,7,8,9 (Versions 5 and 6)• Read Chapters 1,2,3,4,5,8,9,11(Old Version 4)

• No assigned due date (reference class discussion)

Lynda.com

• http://myrssfeeds.pitt.edu/announcements/2014/01/07/wordpress-excel-audacity-premiere-elements-access-and-much-much-more-cssd-brings-you-the-tech-training-you-need-any-time-you-want-through-a-partnership-with-lynda-com-2/

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Articles

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What is Net Neutrality

• Q: What is net neutrality?

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What is Net Neutrality

• A: Net neutrality, or open Internet, is the principle that Internet service providers (ISPs) should give consumers access to all legal content and applications on an equal basis, without favoring some sources or blocking others. It prohibits ISPs from charging content providers for speedier delivery of their content on "fast lanes" and deliberately slowing the content from content providers that may compete with ISPs.

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How the AOL-Time Warner Merger Went So Wrong

• In Retrospect How the AOL-Time Warner Merger Went So Wrong – NY TIMES• http://www.nytimes.com/2010/01/11/business/media/11merger.html?

pagewanted=all• By TIM ARANGO Published: January 10, 2010 • A decade ago, America Online merged with Time Warner in a deal valued at a stunning

$350 billion. It was then, and is now, the largest merger in American business history. • The Internet, it was believed, was soon to vaporize mainstream media business

models on the spot. America Online’s stock price made it worth twice as much as Time Warner’s with less than half the cash flow.

• When the deal was announced on Jan. 10, 2000, Stephen M. Case, a co-founder of AOL, said, “This is a historic moment in which new media has truly come of age.” His counterpart at Time Warner, the philosopher chief executive Gerald M. Levin, who was fond of quoting the Bible and Camus, said the Internet had begun to “create unprecedented and instantaneous access to every form of media and to unleash immense possibilities for economic growth, human understanding and creative expression.”

• The trail of despair in subsequent years included countless job losses, the decimation of retirement accounts, investigations by the Securities and Exchange Commission and the Justice Department, and countless executive upheavals. Today, the combined values of the companies, which have been separated, is about one-seventh of their worth on the day of the merger. 15

Comcast “tries” to acquire Time Warner April 24,2015

• Comcast drops Time Warner Cable bid after antitrust pressure

• http://www.reuters.com/article/2015/04/24/us-comcast-timewarnercable-idUSKBN0NE2D220150424

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Charter Communications to acquire Time WarnerMay 27, 2015

• http://www.nytimes.com/2015/05/27/business/dealbook/charter-communications-agrees-to-acquire-time-warner-cable.html?_r=0

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Verizon to acquire AOLMay 18,2015

• http://www.businessinsider.com/verizon-aol-and-facebook-instant-articles-content-is-king-in-tech-again-2015-5

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Internet access

• How to access the Internet from your home?

• Transmission medium

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Internet access from home

1) Dialup - Copper telephone wire (Verizon)

2) DSL - Copper telephone wire (Verizon)

3) FIOS - Fiber Optic cable (Verizon)

4) Cable Modem - Coaxial cable (Comcast)

5) Satellite - Air - (Dish)

6) Wireless – Air

7) Power line – Wire - (Duquesne Light) future?

DSL

• DSL = Digital Subscriber Line• Digital Subscriber Line (DSL) is a family of technologies that provides digital

data transmission over the wires of a local telephone network. DSL originally stood for digital subscriber loop. In telecommunications marketing, the term Digital Subscriber Line is widely understood to mean Asymmetric Digital Subscriber Line (ADSL), the most commonly installed technical varieties of DSL.

• DSL service is delivered simultaneously with regular telephone on the same telephone line. DSL uses a second, higher frequency band (greater than 25 kHz) above the low frequency regime (5 kHz and below) used by voice communications. On the customer premises, a DSL filter is installed on each outlet for telephone handsets to remove the high frequency band, eliminating interference with the operation of the telephone set, and enabling simultaneous use.

• DSL can use the existing phone wires that are connected to your house

Key business needs

• Voice

• Data

• Image

• Video

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Representing information digitally

• The dictionary defines digital information as data represented using numbers.

• How can we represent an image digitally

Digital image

• How can we represent an image digitally?

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Copyright © 2006 Pearson Addison-Wesley. All rights reserved. 1-25

The Monitor

• Interactive video screen– Bit-mapped

• Display information stored in computer memory

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Pixel

• What is a pixel?

Pixels

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Analog• Analog waves have three important characteristics. The

first is the height of the wave, called amplitude. The second characteristic is the length of the wave, usually expressed as the number of waves per second, or frequency. The third characteristic is the phase, which refers to the direction in which the wave begins.

• Note: wavelength is inversely proportional to frequency

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Analog signal to carry digital information

• How can we use an analog signal to carry digital information?

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Analog signal communicating digital information

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What is this?

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What is this?

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Cavemen and Information

• A caveman is in a cave with his club and his Motorola Droid with Internet

• It’s been raining and the river is rising and approaching the cave door

• If he tries to leave his cave now he has a 50/50 chance of crossing the river

• If he stays, and if it keeps raining, then he is caveman history

• If it stops raining, then the water will drop and he will be safe

• What is his most important information?• How critical is this information?

Cave choices?

• The Cave man should:– Text his wife telling her that he might be late

for dinner– Update his Facebook with cool pics of the

water rising– Tweet that a huge event is about to happen in

his life– Google “How to swim”– Other?

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The importance of information

• What are some examples of important information?

• How important is it?

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When is information important?

• The weather forecast gives the height of waves on Lake Erie. Is this important information?

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What is this?

Paleolithic Cave Drawing

Is this information?

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Communications

• What does communications mean?

• What does telecommunications mean?

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Communication

• According to the Merriam Webster Dictionary, Communication is:– An act or instance of transmitting– A process by which information is exchanged

between individuals through a common system of symbols, signs, or behavior

– Technology of the transmission of information (as by print or telecommunication)

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According to Webster

• Main Entry: tele·com·mu·ni·ca·tion Pronunciation: "te-li-k&-"myü-n&-'kA-sh&nFunction: nounEtymology: International Scientific Vocabulary1 : communication at a distance (as by telephone)2 : a science that deals with telecommunication -- usually used in plural

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Dictionary.com

• tel·e·com·mu·ni·ca·tion ( P ) Pronunciation Key (tl-k-myn-kshn)n. – The science and technology of communication at a distance by

electronic transmission of impulses, as by telegraph, cable, telephone, radio, or television. Often used in the plural with a singular verb: Telecommunications is an important area of professional growth.

– The electronic systems used in transmitting messages, as by telegraph, cable, telephone, radio, or television. Often used in the plural with a plural verb: Telecommunications were disrupted by the brownout.

– A message so transmitted.

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Name some early forms of (TELE)communications

Semaphore

• "One of the early characteristics of the early non-electrical systems was that they were capable of transmitting very little information; for example, if you had previously agreed that lighting a signal fire means 'The city has fallen', you have no means of sending an alternative message such as 'Clytemnestra has twins', although it may be of equal importance. In a very limited sense the information is coded, that is the occurrence of fire means a certain message and no other" (Beck 45).

• Using the semaphore code, messages were sent letter by letter. Transmission would be measured by words per minute.

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Early communication

Spaceship Earth

• A Nerd at Spaceship Earth Epcot WDW

• TO BE CONTINUED