CHAPTER 6 & PENGEDITAN IMEJ

CHAPTER 6: INSIDE COMPUTER AND MOBILE DEVICES


INSIDE THE CASES

• The case contains and protects the electronics of the computer or mobile device from damage.

   

          

• The motherboard is the main circuit board of the computer.

           - A computer chip contains integrated circuits.

PROCESSOR

• Also called the central processing unit (CPU), interprets and carries out the basic instructions that operate a computer.

          - Contain a control unit and an arithmetic logic unit (ALU)

• A multi-core processor is a single chip with two or more separate processor cores.

• The control unit is the component of the processor that directs and coordinates most of the operations in the computer.
• The arithmetic logic unit (ALU) performs arithmetic, comparison, and other operations
• A processor repeats a set of four basic operations, which consist of a machine cycle for every instructions.

• A processor chip generates heat that could cause the chip to malfunction or fail
• Require additional cooling

          -Heat sink

          -Liquid cooling technology

          -Cooling mats

CLOUD COMPUTING

• Home and business users choose cloud computing for a variety of reasons

          -Accessibility

          -Cost Saving

          -Scalability

          -Space Saving

DATA REPRESENTATION

• Analog signals are continuous and vary in strength and quality.
• Digital signals are in one of two states: on or off

          -Most computers are digital

          -The binary system uses two unique digits (0 and 1)

• The circuitry in a computer or mobile device represents the on or the off states electronically by the presence or absence of an electronic charge.

• Eight bits grouped together as a unit are called a byte. A byte represents a single character in the computer or mobile device.

• Memory consists of electronic components that store instructions waiting to be executed by the processor, data needed by those instructions and the results of processing the data.
• Memory stores three basic categories of items:

          -The operating system and other programs

          -Applications

          -Data being processed and the resulting information

• The system unit contains two types of memory:

          -Volatile memory

             -Loses its contents when power is turned off

          -Nonvolatile memory

            -Does not lose contents when power is removed

• Read-only memory (ROM) refers to memory chips storing permanent data and instructions.
• Flash memory can be erased electronically and rewritten.
• Access time is the amount of time it takes the processor to read from memory

          -Measured in nanoseconds

ADAPTERS

• Adapter card enhances functions of a component of a desktop or server system unit and/or provides connections to peripherals.

          -Sound card and graphics card

• Expansion slot is a socket on a desktop or server motherboard that can hold an adapter card.

• With Plug and Play, the computer automatically can recognize peripheral devices that has been installed.

POWER SUPPLY AND BATTERY

• Power supply or laptop AC adapter converts the wall outlet AC power into DC power

• Mobile computers and devices can run using either a power supply or batteries
• Batteries typically are rechargeable lithium-ion batteries

PENGEDITAN IMEJ (GIMP)

Tools Icon:

Paint tools:

• Brush Tools (Pencil, Paintbrush, Airbrush)
• Bucket Fill
• Gradient
• Pencil
• Paintbrush
• Eraser
• Airbrush

Transform tools:

• Align
• Move
• Crop
• Rotate
• Scale
• Shear
• Perspective
• Flip

Text:

Text tool options:

Filters:

• Blur 
• Enhance
• Distort
• Light and shadow
• Noise
• Artistic
• Edge-detect
• Generic
• Combine
• Rendering 
• Animation