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Archive for February, 2010

Decoding binary into english etc.

Because all of a computers language is made up of binary in order to type and see the right symbols for each letter a binary code has been assigned to it, there are also binary codes for spaces and punctuation, e.g. $%& etc.

These binary codes are made up of 8 ‘bits’

The first 3 digits tell the computer whether the code is for a letter, space, full stop etc (Or which category the symbol is in)

The second 5 digits tell the computer which symbol in that category that it needs to display.

Example

The letter a in binary is 011 00001

But A is 010 00001

The first 3 digits of these 2 codes is different because capitals and small letters are in different categories. (note: the spaces are put in for visual purposes and shouldn’t be used when writing in binary)

The alphabet is made using the units holder

eg a is the first letter and so represented by a 1

 8|4|2|1|

0|0|0|1|

g is the 7th letter so

8|4|2|1|

0|1|1|1|

When you get past the 15th letter it will go up to 5 digits, with the 16th placeholder. (assume there is a 0 in front to make the symbol number into 5 digits)

A good website to convert english language to binary and back again is

http://www.roubaixinteractive.com/PlayGround/Binary_Conversion/Binary_To_Text.asp

Long division

When carrying a 1 over it makes your next number a 10 e.g.

31÷2     2÷3=1 remainder 1 so the 1 in 31 becomes 11… so that’s 5 remainder 1

=15¹

Changing binery to whole numbers

To change binery to numbers is pretty simple.

10101²

You write out your usual grid

16| 8| 4| 2| 1|

  1| 0| 1| 0| 1|

Then x each top number by the bottom number starting with the 1

1×1=1

2×0=0

4×1=4

8×0=0

16×1=16

Then add the answers together

1+0+4+0+16=21 to the power of 10

Or you can just add up the numbers that have a 1 below them, just not in exams!

Changing whole numbers to binary

Bits and bytes

Old computers use to have 6 bits to a byte, new ones usually have 8 bits to a byte.

Two states

All computers use two rules (base 2)

on/off

yes/no

1/0

true/false

current/no current

Changing whole numbers to binary

When changing numbers to binery with a base 2, if the answer is even put a 0 beside the sum, if the sum is odd put a 1 beside the sum.

2|26       26/2 =13 With 0 remaining (0 is next to the 13)

2|13  0   13/2= 6 With 1 remaining (1 is next to the 6)

2| 6   1    6/2=3 With none remaining …etc.

2| 3   0

2| 1   1

2| 0  1

Read the zeros and ones from bottom to top e.g. 11010

16| 8| 4| 2| 1|

  1| 1| 0| 1| 0|

Figuring out if it’s right is easy Just add up what the ones are under (16+8+2=26)

If it takes more than 5 ‘ones’ or ‘zeros’ to get the equation to zero the 1,2,4,8 etc. doubles each time 🙂

Webpage hierarchy

Just like internet favourites, web pages can have multiple files in folders and multiple folders in folders.

When drawn out this looks like a family tree with parent pages (folders) and child pages (folder or files, folders have files branching from them but files wont have folders branching from them, a file becomes a folder when it has another file branching from it)

When linking further into a website (to navigate the website) it is important to follow the hierarchy down (from the index page) and back up (to the the index page). There are seperate ways to go up and down.

If going from the index page through a few folders to a file you would put in the following:   folder#1/folder#2/file

eg: to get from the ‘index’ folder to the ‘about’ file I have to go from the ‘index’ folder to the ‘home’ folder to the ‘about’ folder to the ‘about’ file.

home.html/about.html/about.html

When going from a file to the index page (or through a folder to another folder) for each folder you pass through you add a ../ eg: (using about files and folders) to get from the about file to the home folder you would use

about.html../home.html../index.html  (at least I think that is the right way around)

Citations

Craig Mathias.  (2010, February). Testers pick their favorite products. Network World (Online),55.  Retrieved February 22, 2010, from ProQuest Computing. (Document ID: 1967748101).
 
Samsung to release new version of USB drive. (2010, February). Worldwide Computer Products News,55.  Retrieved February 22, 2010, from ProQuest Computing. (Document ID: 1957079671).

Assignments for course

Business comunications

Assignment one – 45% – Writing portfolio – Simple research process and effective writing and presentation skills

Assignment two – 25% – User manual – Technical writing

Assignment three – 30% – Exam – Types and characteristics of written communication, technical communication and effective writing skills

Recommended readings

Effective business communication in New Zealand (2nd ed.)

The business communication handbook (3rd ed.)

Communication skills (4th ed.)

 

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