Week_1

Week_1 - What is information? With notes about Google and...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
What is information? With notes about Google and Wikipedia
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1. Information in nature Information exists as a measurable condition of material things, independently of what human do or don’t do. In most scientific contexts, information is a measure of the number of possible arrangements of its parts. (Claude Shannon, Norbert Wiener) A material thing with high information or high entropy is disordered, and requires a lot of information to describe it. Examples of low entropy: Crystals, such as salt or snow flakes, have low entropy in comparison with a vapor or gas in which the molecules are not fixed in place. http://josepino.com/other_projects/?growing-salt DNA http://en.wikipedia.org/wiki/DNA http://www.ncbi.nlm.nih.gov/projects/mapview/maps.cgi?taxid=9606&chr=1
Background image of page 2
2. Simple example Consider a roll of coins, all facing the same way. This has a high degree of order, like the atoms in a crystal or in a magnet. Each coin is enough to tell you how all the coins look. Now rip open the roll of coins and drop them on the floor. The outcome requires a lot of information to describe it specifically. If you look at one coin it only tells you how that particular coin looks.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
3. How much information? A single raindrop has 100 times as much information (as a physical quantity) than all the words spoken by humans ever. The molecules are arranged in some
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/16/2012 for the course LIS 1001 taught by Professor Online during the Fall '08 term at LSU.

Page1 / 10

Week_1 - What is information? With notes about Google and...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online