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Essay

Information Technology Lecture 1

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Issue:

Technology

 

Written by:

Raymond W

 

Date added:

January 30, 2015

 

Level:

College

 

Grade:

A

 

No of pages / words:

1 / 173

 

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5911 times

 

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Information: is a function of probability -- f(p). Information is inversely proportional to p. Shannons def: info(p)=log2(1/p) Entropy = average information Ex: coin flip Pr(H)=Pr(T)=1/2 Info(H)=log2(1/(1/2))=log2(2)=1 bit Info(T)=1 bit If you flip a fair coin, either output gives you 1 bit. Since the entropy is defined as the average information, Entropy for a coin flip is a 1...
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Since the entropy is defined as the average information, Entropy for a coin flip is a 1. Formal States 1…n Pr(i)=pi Info(i)=log2(1/pi)=-log2(pi) Entropy: H= {draw:frame} {draw:frame} Flipping a coin twice: Possible outcomes: HH, HT, TH, TT n=4, pi=(1/2)(1/2)=1/4 Info(HH)=log2(1/(1/4))=log2(4)=2 Entropy(HH)=2 ? H=-p1log(p1) ' p2log(p2) ' p3log(p3) ' p4log(p4) = ?(2) + ?(2) +?(2) +?(2) = 2 Example: 6 sided die States: 1…6 pi=1/6 Info(pi)=log2(6)=2...
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General issues of this essay:
The Technical System: Information, Information Technology, and Information Systems Information Technology Lecture 1 Information Technology has the potential to change societal structure and processes similar in scale to that of both the Agricultural Revolution and the Industrial Revolution. On this basis governments should ensure provision of Information Techno... How the Information Age Has Changed the Information Systems Industry If You Were James Gorman, The New Head Of Global Wealth Management, What Information Systems Would You Invest In? Why? Do You Think Morgan Stanley’S Plans For An Integrated Client Information System Are Worthwhile? Data Warehousing And The Information Superhighway Information Theory The Information Technology Has Indeed Gone Far Information technology Information Technology Information Technology Information Technology Information Technology Information Technology information technology
 

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