TEKNOLOGI MAKLUMAT DALAM PENDIDIKAN KULIAH 2: TEKNOLOGI MAKLUMAT DALAM PENDIDIKAN DR. NORHASYIMAH HAMZAH FAKULTI PENDIDIKAN TEKNIKAL DAN VOKASIONAL

KOMPUTER???

Computer (cont..1) What is a computer??? Is a device that receives input from the user through a mouse or keyboard, processes it in some fashion and displays the result on a screen. A list of procedures and steps, or a lecture slide with media.

Computer (cont..3) Computer performs 4 major function: 2. Process 1.Input 2. Process A list of procedures and steps, or a lecture slide with media. 3. Output 4. Storage

How do computers process data and information? Data can be stored on a variety of fixed or removable media. In the computer information is stored in files and organised into folders Files can then be organised into folders. Data is represented by a string of 0s and 1s. Each 0 or 1 is called a bit and is the smallest unit a computer can process. A group of eight bits is a byte, and can represent a keyboard character or a command to the computer. How do computers process data and information? Data can be stored on a variety of fixed or removable media. The hard drive is the main form of fixed data storage. On the computer information is stored in files and organised into folders. No data or information on a hard drive can exist outside a file. Files can then be organised into folders. When we look at a file in more detail, we see that data is represented by a string of zeros and ones. Each 0 or 1 is called a bit and is the smallest unit a computer can process. A group of eight bits is a byte, and can represent a keyboard character or a command to the computer.

How do computers process data and information? (cont..1)

How do computers process data and information? (cont..2) Bits and bytes -the language of computers-to tell computers what to do What else can bit and bytes be used for? To represent the quantity of data and information that it inputs or outputs

INPUT OUTPUT

Input devices Keyboard Mouse Scanner Microphone Digital camera Stylus Your fingers Example graph/chart.

keyboard

keyboard Dvorak Qwerty Puts the most commonly used keys at “home keys” The QWERTY layout was originally designed for typewriters, not computers, and was meant to slow typists to prevent typewriter keys from jamming. The QWERTY layout is therefore considered inefficient because it slows typing speeds. Puts the most commonly used keys at “home keys” Reduces distance of finger stretches The QWERTY keyboard gets its name from the first six letters in the top-left row of alphabetic keys on the keyboard. The QWERTY layout was originally designed for typewriters, not computers, and was meant to slow typists to prevent typewriter keys from jamming. The QWERTY layout is therefore considered inefficient because it slows typing speeds. Now that technology can keep up with faster typing, other keyboards are being considered.

Virtual laser keyboard The virtual laser keyboard projects the image of a QWERTY keyboard on any surface. Sensors detect typing motions and the data is transmitted to a computing device via Bluetooth technology.

Mice Roller ball mouse Trackball Optical mouse Less expensive Harder to keep clean Trackball Harder to control Stationary on desk Optical mouse Needs no mouse pad Doesn’t need cleaning More expensive The standard mouse has a rollerball on the bottom, which moves when you drag the mouse across a mousepad. A trackball mouse remains stationary and doesn’t demand much wrist motion, so it’s considered healthier on the wrists. The optical mouse uses an internal sensor or laser to detect the mouse’s movement. Optical mice are often a bit more expensive than traditional mice, but because they have no moving parts on the bottom, there is no way for dirt to interfere with the mechanisms and less chance of parts breaking down. Wireless mice send data to the computer by radio or light waves.

MOUSE CORDLESS MOUSE OPTOMECHANICAL MOUSE

What other tasks can be done with a mouse? Magnifier

What other tasks can be done with a mouse? Web search

What other tasks can be done with a mouse? File storage Includes a wireless USB receiver that contains flash memory to store or back up your files

Other input devices Touch pad (or track pad) Joysticks Touch screen Smart pen Webcam

SCANNER Similar to a copy machine 2 types Optical scanner Optical mark recognition

Optical mark recognition

Ex: OPTICAL READER (OMR)

OPTICAL SCANNER

BAR CODE SCANNER

SNAPJET

OTHERS INPUT DEVICES USER INPUT DEVICES Home user & Small Business -enhanced keyboard or ergonomic keyboard -joystick -Scanner -digital camera -microphone -video digitilizer Mobile user Wireless mouse Trackball, touchpad,, pointing stick on laptop Pen computer Digital camera Large business Enhanced keyboard or ergonomic keyboard Touch screen Pen computer with light Scanner OCR or OMR or bar code reader Microphone Video camera for video conferences Speech recognition program