TODAY.
A memory is different than storage. If you store stuff in a memory you can use it but if you store something in the storage it gets saved in a hard drive. Dynamics means it changes. The only code the computer understands is binary. Do not put a CD rom in the microwave. There are three parts on a CD rom, the label, the shiny reflection metal surface, and the other pieces of plastic. The most delicate place on a disc is the top part, one should not write on it. CD's have millions of pits in it. They are called bumps. If a laser sees a pit it the CD will work if it doesn't work. 1 megabyte is a million bits. 700 million X 8= 5 billion little pits on a disc or the shiny spots. A DVD has 1 bite which equals to 8 bits. There is a printed circut card on the back. If there is a scratch on the disc the laser will not be able to read the binary code. The laser light bounces off the shiny part and if there is a pit it counts it as 1. Hard drives and floppy discs are not stored optically. Hard Drives are hard and floppy discs are floppy.

BY ::: ARDAVAN...! 9F

COMPUTER PARTS!!!

Modem - changes the information from binary to audible and availiable for people. Allows you to connect to the internet.
PCI slots - located on the motherboard, allow you to plug in your devices - through appropriate cards. Make sure though that your slot is up-to-date with your card or else it won't fit. If it does not fit, then leave it alone, don't hammer it in.
Video Card - controls the picture on your screen. Some video cards come built-in your motherboard. They are usually not the best quality, but you can live with it. However, if you play a lot of video games, then you might want to buy a more advanced video card, so that all the images and pictures and parts of the game run smoothly. Same goes if you are working with images (e.g. using Photoshop a lot like I do.)
Audio Card - that's right, it controls what you can hear, all the sounds. It is pretty similar to a video card when it comes to quality and upgrading to a better card. If you are the type of listener, who cares about every single note in a song, then perhaps it's a good idea to buy a more advanced card. If you are using your computer just to fo homework and chat on MSN, then you probably can go with the video and audio cards you have built-in your motherboard (if there are ones built-in.)

By Ardavan.Z

Computer Parts!!

Motherboard
There is something called a thermal compound which prevents the CPU from getting hot>Also the fan which comes attached to certain kinds of CPU. If nothing was there to cool it then the CPU would break down.
Theres a battery installed in the motherboard which controls the BIOS. If this battery is removed all your settings will get erased and your computer will be back to its old settings.
CD-ROMS
-CD-ROM is a storage device
-The information on the CD is stored in little dots called pits. They follow binary 0-is no pit 1-is the actual pit
The CD's we use have three layers 1) its the writable part its very thin here u can put a label. 2) the middle layer which consists of all the pits there. This part is delicate. Lastly a layer of plasctic covers it here you shouldn't be touching. This is what covers the delicate layer.
A CD holds 700MG and a DVD holds 4.7GB.
Optical Storage: This is something which is used to store and read with the help of the laser.
You should be very careful with both the upper and lowest layer of the disc by not writing with pen which contains acid and damages your pits. If by anychance there is a scratch in your CD which will mean the laser in your CD player will to mistrack> there are two ways of recovery:
1) There are CD-cleaning fluids that are available which you can buy
2) Toothpaste can also be used which you rub it on the scratch from the centre to the outer portion.
Magnetic Part
A magnet has two poles as we know> north & south. The magnet is used like a switch on & off representing binary.
One magnet is one bit
A hard drive disk is a metallic magnetic disk with loads of magnetic receptors.
One thing to remember is that unlike CD's, HDD's use magnets not pits.
Incase you don't know BUT NEVER!! PUT MAGNETS NEAR YOUR HARDDRIVE-THEN SAY GOODBYE!! TO IT.
The other Parts of the Motherboard
Controller Card which consists of:
1) power input
2) IDE which attaches the HDD to the CD-ROM by a long wide cable
3) jump switch (something movable and creates a circiut)
A capacitor- an elctronic device that holds charge
A laser which located on the arm inside the CD-ROM. While the disc spins the laser slides back and forth to read information from the center of the drive.

By Ardavan.z

RAM VS HARD DISK

The ram definition according to GOOGLE is random-access memory: the most common computer memory which can be used by programs to perform necessary tasks while the computer is on; an integrated circuit memory chip allows information to be stored or accessed in any order and all storage locations are equally accessible .

The Hard Disk definition is a rigid non-removable disk in a computer and the drive that houses it. Hard disks store more data and can be accessed quicker than floppy disks.

Here is some deffernce between these two items.

RAM: Memory

HARD DISK:Storage

RAM:Smaller amount typically 128 MB to 1 GB

HARD DISK:Much larger amount typically 1GB to 750GB

RAM:Temporary storage of files and programs

HARD DISK:Permanent storage of files and programs

RAM:It could get ruined by a spill of something liquid like a coffee or a coke.

HARD DISK:It's safe from spills.

RAM:Loses all the information when the computer turns off.

HARD DISK:Saves all the information when the computer turns off (unless you delete it)

RAM: Disappear when the computer crashes

HARD DISK:Contents remain when the computer crashes

RAM:When you want to use a program, a temporary copy is put into RAM and that's the copy you use .

HARD DISK:Holds the original copy of the program permanently .

RAM:The file you are modifying, plus all the changes you make, are kept here in RAM until
you do a "save"

HARD DISK:When working on a file, the original file is left untouched here in the Hard Drive until you save it ,The save copies the new version of the file that's in RAM onto the Hard Disk
HARD DISK VS RAM!!!!>......:p

MONITORS

All desktops use monitors and they are either LCD or CRT.

LCD stands for liquid crystal display. CRT stands for Cathode Ray Tube.
LCD definition=Liquid Crystal Display. A display that consists of two polarizing transparent panels and a liquid crystal surface sandwiched in between. Voltage is applied to certain areas, causing the crystal to turn dark. A light source behind the panel transmits through transparent crystals and is mostly blocked by dark crystals.

CRT definition=Cathode Ray Tube. A vacuum tube that produces light when energize by the electron beam generated inside the tube. A CRT has a heated cathode and grids in the neck of the tube, making up the "gun". Electrons are accelerated from the gun toward the front surface of the tube (screen), producing a beam. The surface on the back of the screen is coated with phosphors that light up when struck by the electron beam. ...

Will be updated in couple of hours.

Binary Number System


Most modern computer systems operate using binary numbers.With two levels we can represent exactly two different values.These could be any two different values,and those two values are zero and one( 1 and 0).

The decimal number system that people use every day contains ten digits, 0 through 9. Start counting in decimal: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, oops! There are no more digits left. How do we continue counting with only ten digits? We add a second column of digits, worth ten times the value of the first column. Start counting again: 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 (Note that the right column goes back to zero here.), 21, 22, 23, ... , 94, 95, 96, 97, 98, 99, oops! Once again, there are no more digits left. The only way to continue counting is to add yet another column worth ten times as much as the one before. Continue counting: 100, 101, 102, ... 997, 998, 999, 1000, 1001, 1002, .... You should get the picture at this point.
Another way to make this clear is to write DECIMAL numbers in expanded notation 1032 is equal to 1 1 000's +0 100's +3 10's +2 1's . By writing numbers in this form, the value of each column becomes clear.
The binary number system works in the exact same way as the decimal system, except that it contains only two digits, 0 and 1. Start counting in binary: 0, 1, Oops! There are no more binary digits. In order to keep counting, we need to add a second column worth twice the value of the column before. We continue counting again: 10, 11, oops! It is time to add another column again. Counting further: 100, 101, 110, 111, 1000, 1001, 1010, 1011, 1100, 1101, 1110, 1111.... Watch the pattern of 1's and 0's. You will see that binary works the same way decimal does, but with fewer digits.
Binary uses two digits, so each column is worth twice the one before. This fact, coupled with expanded notation, can be used convert between from binary to decimal. In the binary system, the columns are worth 1, 2, 4, 8, 16, 32, 64, 128, 256, etc. To convert a number from binary to decimal, simply write it in expanded notation. For example, the binary number 101101 can be rewritten in expanded notation as 1. By simplifying this expression, you can see that the binary number 101101 is equal to the decimal number 45.

An easy way to convert back and forth from binary to decimal is to use Microsoft Windows Calculator. You can find this program in the Accessories menu of your Start Menu. To perform the conversion, you must first place the calculator in scientific mode by clicking on the View menu and selecting Scientific mode. Then, enter the decimal number you want to convert and click on the Bin check box to convert it into binary. To convert numbers from binary to decimal, click on the Bin check box to put the calculator in binary mode, enter the number, and click the DEC check box to put the calculator back in decimal mode.


HERE IS SOME LINKS THAT HELPS YOU TO KNOW MORE ABOUT BINARY NUMBERS:
http://www.usbyte.com/common/binarysystem.htm
http://l3d.cs.colorado.edu/courses/CSCI1200-96/binary.html

Hi...Today I don't know what to talk about but here is some information about Graphic Cards.


Computers operate using binary number system. This binary data is translated into a picture that we see on a monitor picture consists of over a million dots. We call them pixels. To say it all in simple words, this translation job is performed by the graphics card. This job is very complex. In this article we will learn about the basic parts of a video card and how they all work together four main components of a graphics card are connections for the motherboard and monitor, a processor, and memory. Here are some information about these four main components of a graphics card.
A Motherboard connects the data and power.
A processor is to decide what to do with all those pixels on the monitor screen. The Memory is to hold all the information in each pixel and to temporarily store them in completed pictures
The monitor connection shows you the final result.

All graphic cards have a heat sink or a fan on them so it can cool them down when they are working in computer case.

Suggestions: I suggest you to buy a good graphic card like nViDia or ATI .

Hope that helps. I will add more information later on.

Today in our computer class I learn alot of new things about sending email and so many other thingy that im going to discuss now.

Today i learned, wat is bbc and cc stands for in E-mail.
CC is when you are sending an email to many people and you want them to see that you post it to other people.

BBC is when you are sending an email to many people, but you dont want them to see that you send the same email to other people.

I also learned about SPAM , Spam is when you are checking your mail box but you are seeing that someone send you a junk email that it sends to 100 or even 1,000 of people at once.
that is called spam emails and they belong in your junk box, And also always have a security program that protects your computer from spyweres and adwares....use program like NORTON ANTI-VIRUS or Mc afee and any other programs that has the following.

Also if you do not have an email address here are some web sites that helps you to get one.

www.yahoo.com (from yahoo)
www.msn.com (from microsoft)
www.gmail.com (from google)
and Etc.....

Attaching Files: this is needed when you want a picture or a program (file) to someone else...you simply click on attach files on the top corner and at the next page you click on browse and choose the picture or program you want. Then you click on attach files again and wait for it to upload when it finishes, click on send and it will send it to the person you want.

Hi...My name is Ardavan and I live in Canada,Ontario. I am 14 years old and I borned in Iran, Tehran, I am about 190cm tall and I don't know how many feet I am. Anyways my favorite hobie is to play soccer and I play soccer everyday at school and after school outside with my friends and others, My favorite coarse is math , I like it because it make me more think and helps me a lot , when Im coagulating something in my head. At home I play some games with my computer and use my computer to help me to get information about my projects and my homework. I really like Persian foods and I think they are delicious. My favorite fruit is Orange because its sweet and it gives us Vitamin C. My favorite color is red because I don't know I just like it a lot. I bringed my computer from Iran to Canada so I had to take of all the parts of my computer.