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25/09/06
First we did some typing, then Mr. Case took us to the table to teach us a lesson about BIOS, RAM, and Motherboard. Down below you can find some major information about each of the topics. Since I already did some blog entries on RAM, you won't be able to find any information about RAM on this entry.
BIOS 
* stands for basic input/output system
It's a very important part of the computer. When the computer is on, the BIOS makes sure that every computer component knows what it's supposed to do. Without the BIOS the computer would be nothing.
Motherboard
* Motherboard is one of the main part of the computer.
** Motherboard is where everything is connected.
*** The more items connected to the motherboard the faster it will work.
Down below you can see a brief diagram of the motherboard.
22/09/06
COMPUTER HISTORY
You might be wondering what a computer is and when was it invented. Well computer is something that you put information and get information back.
Abacus (the first type of computer) was invented 10 000 years while the digital computer was invented about 100 years ago.
INPUT & OUTPUT DEVICES
Input devices- keyboard, mouse, scanner, camera, graphic tablet
Output devices- monitor, speakers, printer
BINARY NUMBER SYSTEM (Computer's number system) Computers number system consists of two numbers: 0 and 1. 1 means on and 0 means off.
BITS AND BYTES
Every piece of information is a bit.
8 bits= a byte.
1000 bytes= kilobyte
8000 bytes= megabytes
Million bytes= gigabyte
Floppy disk= million and a half bytes
USB Keys= 32 mega bytes
Kilobyte= 1000(rounded up) but 1024 as binary numbers
Terabyte= 1000 gigabyte
20/09/06
As usual we did All The Right Type, but the teacher told us that our files on All The Right Type have been erased due to a problem. After that Mr. Case taught us a lesson about monitors.
MONITORS
* Well monitors are an important part of the computer because it is used to view the items that we put in to the computer.
** There two types of monitors. The first one is CRT and the other one is LCD. CRT stands for Cathode Ray Tube and LCD stands for Liquid Crystal Display.
*** Usually when we measure things we either measure from top to bottom or from left to right but for monitors you have to measure diagonally.
**** In LCD monitor, there's liquid in between two glasses. That's why when you press a LCD monitor, the picture on the screen goes all wiggly.
***** If you compare the prices of CRT and LCD monitor then CRT will definitely be cheaper because the CRT monitor is a lot bigger in size than the LCD monitor.
****** Let's say that CRT monitor is 25 inches but when you meausure the screen probably only 20 inches are going to show bacause the rest of the glass is behind the frame.
Well I hope you learned some great information about the monitor because I sure did. If you have any questions or doubts then just mention it in the comment box and I will be glad to clear it.
20/09/06
On 19/09/06 and 20/09/06 we did our presentations on our computer component projects. Down below you can see some of the topics that people presented.
TOPICS
* Sound Card
* RAM
* CPU
* Memory Disk
* Keyboard
* Mouse
* Monitor (Mr. Case did this one)
18/09/06
* when the computer is turned off all the data that is stored in the RAM is lost.
* Some of the new developed chips are designed to hang on some of the information even when the computer is turned off.
CREDITS
* http://computer.howstuffworks.com/ram.htm
* http://www.ramprocess.com/Articles/history.htm
* http://www.webopedia.com/TERM/R/RAM.html
* Book:
* Title: How Computers Work
* Author: Ron White (pg.31-35)
15/09/06
* When you read the information that is stored in the RAM once again the electrical pulse goes through the address line which closes the transistor that are connected to it.
* In the address line there is a capacitor that contains the electric pulse which will be discharged when the transistors are closed.
* The software can tell which data line the pulse came from. Based on that a pulse that runs on the data line is known as 1.
HISTORY OF RAM
* RAM was invented in by Keith Blackburn and Richard Steel in 1940.
* Both engineering graduates from Ohio State University.
* Keith Blackburn continued to make the press for RAM until he retired in 1979.
* RAM Products, Inc. was organized in 1979.
13/09/06
HOW DOES RAM WORK?
* Doesn't matter the type of PC you have for when it comes to a PC data exists only as binary numbers meaning o and 1.
* For a computer binary numbers would be its language for even the most powerful and biggest computer is nothing but a bunch of switches with out binary numbers.
* Each key you hit has a code.
* When you hit a key the computer accesses a certain code that allows you to view the key you desire.
*Example:
* A has the decimal code number of 65.
* B:66 C:67 and so on.
WRITING DATA TO RAM
* Software and operating system sends a lot of electric pulse through the address line where it decides where to record data within many address lines in the RAM.
* In each memory location the electricity turns on the transistor ( which is a tiny electrical switch) that's connected to the data line.
* Transistor needs to be on, in order for the electrical pulse to pass and get to the capacitor.
When it reaches the capacitor, it gets stored and capacitor gets charged. The capacitor represents one bit. When the capacitor is charges it equals 1 but when it is not charges it equals 0.
12/09/06
Today the class got an opportunity to work on our computer component project. Down below you can see all the research me, Basant and Monjoini did today.
WHAT IS RAM?
* stands for “Random Access Memory”
* Type of computer memory
* Best recommended
* Accessed randomly
* Most common type found in many computers.
Types of RAM
* DRAM (Dynamic Random Access Memory) which is the most common form of energy memory. In the DRAM there is a combination of the transistor and the capacitor, which creates the memory cell. The transistor is designed like the switch that’s controls and allows the circuitry on the memory chip to read or change the capacitor (which stores electrical energy.)
* SRAM (Static Random Access Memory) The static Ram is faster and more expensive then the dynamic Ram. Static ram is used to create the CPU’s cache function faster, while on the other hand the dynamic Ram can store more space.
Static Ram is a lot faster than Dynamic Random Access memory, but is a lot more expensive.
11/09/06
DEFINITIONS
Hardware: Any part of the computer that you can touch. Ex: Floppy Disk
Software: Any part of the computer that you can't touch. Ex: Programs (Microsoft Word)
COMPUTER COMPONENT PROJECT
Today in class, the teacher assigned us our first project which is a group project. The basic idea of the project is to teach the basic ideas of a computer part to the class. The teacher will first assign a computer part, for that you have a chioce of picking easy part or a hard part. If you pick a hard part then you will recieve more marks. To present the project, you have a chioce of doing a powerpoint presentation. The project is due on Tuesday September 19,2005
08/09/06
Today in business computers, we learned about the features in email. Some examples can be Cc, and Bcc.
First of all I'm going to tell you what these symbols mean, then I’ll you what they do. Cc means carbon copy, and Bcc means blind carbon copy.
These are just some of the main ones; there are many more features in emails. For example subject, attachment files, junk mail, compose and many more.
The Cc button sends copy of the email you're getting to a different person at the same time as you. While the Bcc button sends the copy of the email you're getting to a different person without you knowing it.
You might be wondering what subject and compose mean. Compose means to type and send email. Subject is just the title of your email.
By the way, there’s also forward mail and it means to send the mail you got to a different person.
These are just some of the main features in emails. You could easily get an email address without even spending a penny.
06/09/06
ABOUT MY SELF
Hi! My name is Bavithra Rajendran. I am 14 years old. I was born in Sri Lanka on April 6th 1992. My dad's name is Rajendran, and mom's name is Uma. I have one older brother.
My all time favourite movies are "Back to the future" and "Harry Potter." My favourite subjects are math, science and computer.
I love making friends. Lucy is my best friend, and my some of my other friends are Ashlee, Ritika, Jyoti, and Basant.
One of my favourite hobbies is watching TV. Some of my favourite TV shows are Friends, Passions, and Spongebob Squarepants. I also really enjoy exploring the internet, go shopping, talking on the phone, reading and hanging out with my friends.
Like some people, I hate doing chores, homework and getting disturbed when I’m doing something really important.
By the way I love little kids and petting animals. My most favourite animals are dogs, hamsters, rabbits, and fish. I most certainly hate cats, and birds. I just can't stand these animals.
I can play the keyboard and the flute. My ambition and goal is to become a doctor. I love to learn new things and I always have a positive attitude towards learning. So this is just some brief facts about me, don’t worry there’s a lot more.
