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Summary of AQA A-Level ICT
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Detailed revision notes covering everything students need for their ICT exams- such as health issues relating to ICT and keywords relating to the exam.
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A LEVEL INFORMATION TECHNOLOGY REVISION NOTESUser Support
Methods of User Support
A help desk
o A dedicated telephone number/email address/electronic link
o The user can communicate directly with a person trained in support
Who may be able to control the user’s computer remotely?
Who may have access to a database of problems and
solutions?
Who will talk the user through the system
A user group
o A formal/dedicated body of enthusiasts/end users of a particular
system/software package
Who communicate via an electronic forum/bulletin
board/series of meetings?
o The user can post their problem/query
Or start a thread
And get a response from users with the same problems
User Group Help
The user group enables its members to share knowledge/exchange ideas
about the ICT application
The user group will have an online forum/bulletin board/publish e-
bulletins/produce newsletters and other publications
The employees could check posts/threads/blogs
o To see if an answer to their problem already exists
o Or create a new post or thread/blog
o And receive replies/feedback from other users of the application
,Health Issues
Health Issues from ICT
Repetitive Strain Injury
o Pain or numbness in muscles / nerves / tendons / ligaments
o Caused by constant repetitive / forceful activities when using ICT
equipment
Such as secretary using a keyboard for prolonged periods
Minimised by
o Using ergonomically designed devices e.g. split keyboard
o Or taking regular breaks from using ICT equipment
Posture / Skeletal problems
o Back pain / disc problems / postural stress / sciatica
o Caused by sitting for long periods in an uncomfortable / unnatural
sitting position
Minimised by
o Using adjustable chairs / 5 wheeled chairs
Over exposure to the EMF frequencies emitted by CRT’s
o Can lead to reduced productivity / fatigue / sleeplessness / skin
problems / headaches
Minimised by
o Using a screen shield
Eyestrain problems
o Caused by an unnatural view position
e.g. small fonts, glaring colours
Minimised by
o Using an anti-glare screen
Precautions to minimise eyestrain
Blinking regularly
Adjusting the screen height
Adjusting the brightness / contrast
Regular eye tests
Larger monitors
Adequate lightning conditions
Health Problems that may affect computer users and how they can be minimised
RSI
o This occurs in the upper back/neck/shoulder regions/arms/elbows/
wrists/hands/fingers
, o Symptoms range from numbness/restricted movement to chronic
pain
Remedy
o Take regular breaks every half hour from working at your computer
o Regularly stretch to relax the body. Use footrests, wrist rests and
document holders
o Use an ergonomically designed workstation/keyboard/chair
Carpal tunnel syndrome
o This occurs when a nerve is pinched/compressed in the wrist
o The symptoms are pain, numbness, tingling/weakness in the wrist
Remedy
o Take regular breaks every half hour from working at your computer
o Wear a wrist brace/splint
o Have a cortisone injection/surgery
Ulnar neuritis
o This affects the back of the inside of the elbow
o The symptoms are tingling/pain in the fingers/elbow/funny bone
Remedy
o Use an adjustable seat
o Avoid putting the elbows on the desktop
o Use a wrist support
Backache
o This affects the muscles in the back
o The symptoms are mild/severe pain in the back
Remedy
o Maintain a natural posture while using the computer
o Have adequate lower back support/footrests
o Avoid sitting in the same position for extended periods
o An ergonomically designed workstation
Radiation damage
o From rays from the screen
o Which can affect the whole body
Remedy
o Use an anti-radiation screen
, Video Conferencing
Hardware resources required for video conferencing:
Video Webcam
Microphone
Speakers
Monitor
Broadband Connection
Modem
Benefits of video conferencing to train users:
Travelling is reduced (cost/time)
Trainees can participate from their normal work places
Trainees throughout the country can be trained
Reduction in costs / time / environmental impact
Supports multimedia
Trainees can observe what the tutor / trainer is doing
Interactive
Trainees can communicate directly with the trainer
Trainees can be observed using the system
Training sessions can be recorded and repeated later
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