See here for how to convert a binary number to a decimal number.
See here for how to convert a decimal number to a binary number.
At each of these links, there is a detailed description of the process in text, as well as a video. However, they accidentally put the same video in each. To see how a video of how to convert binary --> decimal, see it on YouTube here.
Actually, I'll also post both videos in this blog post:
Decimal to Binary:
Binary to decimal:
For now, practice with the practice numbers they give at those two links. Eventually, I will assign other binary and decimal numbers to convert for a homework.
Here is an extended ASCII chart.
How to convert between binary and hexadecimal.
How to convert between octal and binary. There are better ways.
Sunday, February 20, 2011
Making Office 2003 Compatible with Office 2007 formats
You can download the Office Compatibility Pack from Microsoft:
By installing the Compatibility Pack in addition to Microsoft Office 2000, Office XP, or Office 2003, you will be able to open, edit, and save files using the file formats in newer versions of Word, Excel, and PowerPoint .
How to obtain Microsoft Office (for PCs)
You can get it from microsoft, in one of three ways:
1) You can use the 60 day free trial, available here:
2) You can buy the full version available for cheap to university students, here:
For this, you will need your QC email, since it requires an email which ends in .edu. $80 is a pretty
good price for the full version of office.
3) For free, you can use Office Web Apps:
These run in your web browser. Unfortunately, Microsoft Access is not included as a Web App, but
it does include PowerPoint, Word, and Excel.
You can get the data files you need for the exercise either by downloading it from Prentice Hall website:
or by bringing in a Flash drive to lab next time and copying the folder onto it.
Sunday, February 13, 2011
If you already have the lecture book
then start reading through the first chapter, "Computer Basics"
Friday, February 11, 2011
I think Blackboard is now up, with hw assignments
So, if you want to submit a homework assignment, try it now.
Have a great vacation!
Have a great vacation!
Thursday, February 10, 2011
Update:
The college is indeed closed for this coming Sunday, Feb 13th.
I still have to set up Blackboard, so hold on to your homeworks for now.
I still have to set up Blackboard, so hold on to your homeworks for now.
Sunday, February 6, 2011
lecture notes, #2
qccs012.blogspot.com
see my email address on the sidebar
Intro to computers, computer science
what is a computer?
something that computes
input, output, math ability, memory, control
input:
keyboard, mouse, mike
output:
speakers, printer, monitor
memory
short term - RAM
long term - CD ROM, hard drive, flash drive, floppy drive
CPU
central processing unit
CPU has:
-ALU: arithmetic / logic unit
-control unit: what happens first, second, third
von Neumann architecture
http://en.wikipedia.org/wiki/Von_Neumann_architecture
data is carried by the "bus"
Old way:
dedicated computer for a specific task
IBN Sorting Machine
http://www-03.ibm.com/ibm/history/exhibits/attic3/attic3_136.html
hardware: physical components
vs. software
Universal, general purpose computer
it has the capability of being any particular computer
we make it into a particular, specific computer by feeding it instructions. software.
fetch-execute cycle
we fetch an instruction
then we carry it out (executing it)
then, we fetch an instruction
then we carry it out (executing it)
then, we fetch an instruction
then we carry it out (executing it)
then, we fetch an instruction
then we carry it out (executing it)
then, we fetch an instruction
then we carry it out (executing it)
pseudo-code. instructions written for a human to understand. computer probably won't.
Adding machine.
program:
1) say "please enter a number"
2) get the number, store it in X
3) say "please enter another number"
4) get the number, store it in Y
5) add X and Y, store it in Z
6) say X "+" Y "=" Z
7) Go to step 1
IP - instruction pointer, inside the control unit.
RAM is volatile memory, short term.
hard disk is not volatile, long term
copy into RAM
set IP= 1
both instructions, data are stored in RAM
this program "loops"
-----
three levels of memory
long term: hard disk
short term: RAM -- random access memory
really short term: registers
sequential access memory -- scroll,
random access memory -- book
http://en.wikipedia.org/wiki/Floppy_disk
parallel, perpendicular
one of them means 0, the other of them means 1
bit - binary digit; 0 or 1
http://en.wikipedia.org/wiki/CD_ROM
more complicated info by combining bits
0, 1, 2, 3
could store these four values in 2 bits
0 - 00
1 - 01
2 - 10
3 - 11
5 pants
8 shirts
40 combinations; 5 x 8
8 bits = byte
how many combinations?
2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 = 2^8 = 256
three bits?
2^3
2 x 2 x 2
0 - 000
1 - 001
2 - 010
3 - 011
4 - 100
5 - 101
6 - 110
7 - 111
all the former possibilities with a leading 0
all the former possibilities with a leading 1
twice as many as before
you add a bit, you have twice as many possible values
four bits -- nibble
how many possible values?
2^4 = 16
0 - 0000
1 - 0001
2 - 0010
3 - 0011
4 - 0100
5 - 0101
6 - 0110
7 - 0111
8 - 1000
9 - 1001
10 - 1010
11 - 1011
12 - 1100
13 - 1101
14 - 1110
15 - 1111
we count memory in bytes
1 byte = byte
2 bytes = word
4 bytes = dword
1024 bytes = 2^10 = kilobyte ~= 10^3
1024 x 1024 bytes = 2^20 bytes = megabyte ~= 10^6
2^30 bytes = gigabyte ~= 10^9
2^40 bytes = terabyte ~= 10^12
http://en.wikipedia.org/wiki/Terabyte
used to be. but memory makers are greedy; they like to market to you also.
they use powers of 10
herz
kilohertz
megahertz
gigahertz
the bigger the number, the faster the computer
multiple CPUs
-----
in lab, we did the four practice exercises. you might want to go through the hands-on-exercises at home, once you get the book.
typography -- appearance of printed matter
font;
serif, sans-serif fonts
http://www.livescience.com/strangenews/more-difficult-fonts-improve-learning-110113.html
fixed-width (monospaced) vs. proportional
is every letter/symbol the same width?
W
i
$ 10.00
$ 0.54
lining up fonts
1 point = 1/72 inch
1 pica = 12 points
how do i make my paper:
adjust font face, point size
increase margins
line spacing
indent
how many sentences per paragraph
=rand(5,4)
lorem ipsem text
between character spacing; kerning
Wi
"WILL TYPE UP YOUR PAPERS. WILL ENSURE THAT THE SPELLING AND GRAMMER ARE CORRECT"
non-breaking space
non-breaking hyphen
windows and orphans
style - a bag of formatting
a way of separating formatting from meaning
reveal formatting - Shift F1
hw:
midlevel exercises and capstone exercise
see my email address on the sidebar
Intro to computers, computer science
what is a computer?
something that computes
input, output, math ability, memory, control
input:
keyboard, mouse, mike
output:
speakers, printer, monitor
memory
short term - RAM
long term - CD ROM, hard drive, flash drive, floppy drive
CPU
central processing unit
CPU has:
-ALU: arithmetic / logic unit
-control unit: what happens first, second, third
von Neumann architecture
http://en.wikipedia.org/wiki/Von_Neumann_architecture
data is carried by the "bus"
Old way:
dedicated computer for a specific task
IBN Sorting Machine
http://www-03.ibm.com/ibm/history/exhibits/attic3/attic3_136.html
hardware: physical components
vs. software
Universal, general purpose computer
it has the capability of being any particular computer
we make it into a particular, specific computer by feeding it instructions. software.
fetch-execute cycle
we fetch an instruction
then we carry it out (executing it)
then, we fetch an instruction
then we carry it out (executing it)
then, we fetch an instruction
then we carry it out (executing it)
then, we fetch an instruction
then we carry it out (executing it)
then, we fetch an instruction
then we carry it out (executing it)
pseudo-code. instructions written for a human to understand. computer probably won't.
Adding machine.
program:
1) say "please enter a number"
2) get the number, store it in X
3) say "please enter another number"
4) get the number, store it in Y
5) add X and Y, store it in Z
6) say X "+" Y "=" Z
7) Go to step 1
IP - instruction pointer, inside the control unit.
RAM is volatile memory, short term.
hard disk is not volatile, long term
copy into RAM
set IP= 1
both instructions, data are stored in RAM
this program "loops"
-----
three levels of memory
long term: hard disk
short term: RAM -- random access memory
really short term: registers
sequential access memory -- scroll,
random access memory -- book
http://en.wikipedia.org/wiki/Floppy_disk
parallel, perpendicular
one of them means 0, the other of them means 1
bit - binary digit; 0 or 1
http://en.wikipedia.org/wiki/CD_ROM
more complicated info by combining bits
0, 1, 2, 3
could store these four values in 2 bits
0 - 00
1 - 01
2 - 10
3 - 11
5 pants
8 shirts
40 combinations; 5 x 8
8 bits = byte
how many combinations?
2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 = 2^8 = 256
three bits?
2^3
2 x 2 x 2
0 - 000
1 - 001
2 - 010
3 - 011
4 - 100
5 - 101
6 - 110
7 - 111
all the former possibilities with a leading 0
all the former possibilities with a leading 1
twice as many as before
you add a bit, you have twice as many possible values
four bits -- nibble
how many possible values?
2^4 = 16
0 - 0000
1 - 0001
2 - 0010
3 - 0011
4 - 0100
5 - 0101
6 - 0110
7 - 0111
8 - 1000
9 - 1001
10 - 1010
11 - 1011
12 - 1100
13 - 1101
14 - 1110
15 - 1111
we count memory in bytes
1 byte = byte
2 bytes = word
4 bytes = dword
1024 bytes = 2^10 = kilobyte ~= 10^3
1024 x 1024 bytes = 2^20 bytes = megabyte ~= 10^6
2^30 bytes = gigabyte ~= 10^9
2^40 bytes = terabyte ~= 10^12
http://en.wikipedia.org/wiki/Terabyte
used to be. but memory makers are greedy; they like to market to you also.
they use powers of 10
herz
kilohertz
megahertz
gigahertz
the bigger the number, the faster the computer
multiple CPUs
-----
in lab, we did the four practice exercises. you might want to go through the hands-on-exercises at home, once you get the book.
typography -- appearance of printed matter
font;
serif, sans-serif fonts
http://www.livescience.com/strangenews/more-difficult-fonts-improve-learning-110113.html
fixed-width (monospaced) vs. proportional
is every letter/symbol the same width?
W
i
$ 10.00
$ 0.54
lining up fonts
1 point = 1/72 inch
1 pica = 12 points
how do i make my paper:
adjust font face, point size
increase margins
line spacing
indent
how many sentences per paragraph
=rand(5,4)
lorem ipsem text
between character spacing; kerning
Wi
"WILL TYPE UP YOUR PAPERS. WILL ENSURE THAT THE SPELLING AND GRAMMER ARE CORRECT"
non-breaking space
non-breaking hyphen
windows and orphans
style - a bag of formatting
a way of separating formatting from meaning
reveal formatting - Shift F1
hw:
midlevel exercises and capstone exercise
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