ICT Topic 1

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Digital devices

-Satelite navigation (GPS)

-Television

-Smartphone

-Personal Computers

-Video Games

-MP3 Players, etc...

-Cameras

-Camcorders

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Communication

-Social networking sites

-Text messages

-Emails

-Video calls

-Voice calls

-Instant messaging

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Leisure

-Watching HD filmms/TV programmes

-Downloading music

-Listening to music with personal media players

-Playing games

-Reading with ebook readers

-Taking/displaying photos or videos

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Factors to consider when choosing a device

-Battery life

-Cost

-Purpose

-Connectivity

-Security

-Support offered

-Storage

-Compatibility with other devices

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Features and functions

Feature: what a certain device includes

Function: what the certain feature does

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Internal memory

Processor needs to store the program instructions and data in its internal memory

Different devices have different amounts of internal memory

Measured in bytes

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Flash memory

-Type of peripheral

-Ideal for portable device

-Doesnt lose data

-No moving parts (solid state)

-Used to transfer data

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Types of flash memory

-SD card

-Micro SD cards

-USB flash drive/memory stick

-SDHC 

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Input devices

Input device: gives instructions and input data to the device

-Mouse

-Keyboard

-Webcam

-Microphone

-Joystick

-Scanner

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Output device

Output device: User can see/hear information after it has been processed

-Headset

-Headphones

-Speakers

-Printer

-Docking station

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Mobile phones

Most widely used personal digital device.

Multifunctional:

  • Camera/video camera
  • Internet browsing
  • GPS receiver (navigation)
  • Entertainment
  • Data storage
  • Can be used on the move
  • People can send messages and use social networking
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Mobile phone security

-Hide the phone

-Set a PIN/password

-Restrict bluetooth usage

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Desktop computer

-Input/Output peripherals

-Hard disk/optical drives, CD/DVD for storage

-Powerful procesors

-Good connectivity

-Easy to uprgrade

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Laptop

-Battery powered

-Monitor, mouse, webcam built in

-Hard disk/optical drives and CD/DVD for storage

-Bluetooth and WiFi

-Good connectivity

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Netbook computer

-Strong, robust

-Small, lightweight

-WiFi built in

-Designed for cloud computing

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Tablet computer

-Light, portable

-Battery powered

-Touch screen

-On-screen keyboard

-Camera

-Playing media

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Ergonomics

Science of designing equipment so that it is comfortable and user friendly

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Health Risks

Eye strain:

  • Looking at screen too long
  • Artificial light on monitor

RSI:

  • Performing repeated actions

Neck and back problems

  • Sitting in worong position
  • Sitting in same position for long time

Knee/Leg pain

  • Wrong position
  • Same position for long time
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Cameras/Camcorders

-Zoom (optical/digital)

-Take photos/videos

-Store files with SD cards

-Crop/edit files

-View files on TV using HDMI ports

-View videos/images on LCD screen

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Digital/Optical zoom

Digital: enlarges part of image  (blurred)

Optical zoom: moves lens closer so light is brought to focus

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Media players

-Small, light, easy to carry

-Solid state memory

-Long battery life

-Hold a lot of media

-Set playlists

-Lock to prevent accidental damage

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Digital Rights Management

DRM prevents you from making copies of audio/video files. Prevents copyright holder from illegal copying.

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Streaming

Advantages:

  • Saves time -continuous stream of data played
  • Uses less storage space

Disadvantages:

  • Can't keep a local copy for offline viewing 
  • Limited availability
  • Dependent on good connection quality
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Games consoles

Peripherals:

-Wireless contollers

-Wireless headsets

-Webcam/speaker/microphone

-Motion sensors

-HD equipment

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Signs of overuse

Spend all your free time gaming

Giving up hobbies

Grades are falling

Irritated/Agitated when not playing

No more socialising

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Home entertainment systems

Digital television

  • High quality
  • More channels than analogue
  • Interactive features 
  • Digital radio stations

Internet

  • Smart TVs/Games consoles allow users to stream films /TV channels
  • Apple TV allows users to access media in iCloud

Blu-ray

  • Play HD movies
  • Store up to 50GB
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Sat-nav

Use GPS to plan routed and give directions, used by drivers, pedestrians and geocachers.

  • Warns drivers about speed cameras
  • Live traffic reports, avoid congestion
  • Scenic routes or conveniences, service stations
  • Used to find pedestrians way into cities, etc...

Health and Safety risks:

  • Take eyes off road
  • Cause a blind spot
  • Lead drivers down hard-to-navigate roads/incorrect destination
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