Wednesday, 24 October 2012


Task 1.11

Teacher – Laptop for on the go access for files and class work. Can work from home if needed and can easily move from classroom to classroom

News Reporter – A news reporter would use a Notebook as it has high mobility, and its main use is for writing up documents

Website Designer – Desktop, working in a stationary environment, working with something purely on the computer- a desktop would be the wisest choice.

Doctor – Desktop, high performance and with no real need to move from the office/room.

Traffic Warden – A PDA would be the easiest choice for a traffic warden as it doesn’t take long to start up and is easily mobile.

Wednesday, 17 October 2012


A cell phone has combined two technologies: telephone and radio. Cell phones work as two-way radios. They send electromagnetic microwaves from base station to base station. The waves are sent through antennas. This is called wireless communication.
There are two types of cell telephone networks:
· Analogue networks
· Digital networks
Most of the older cell phones use analog networks. All modern phones use digital networks.

As you talk on your phone, it converts your voice into an electrical signal, which is then transmitted as radio waves and converted back into sound by the phone on the other end. A basic mobile phone is therefore little more than a combined radio transmitter and a radio receiver, quite similar to a walkie-talkie or CB radio.

In order to remain portable, they need to have compact antennas and use a small amount of power. This means that mobile phones can send a signal over a very short range.
The cellular network enables you talk to your friends, however far away they are. This is done by dividing up land into hexagonal areas of land, each equipped with their own phone mast (base station.)

These massive phone masts pick up the weak signal from your phone and relay it onwards to another phone mast nearer to your friend on the other line. And if you’re on the move while you talk, your phone switches masts as you go without interrupting your call.

Wednesday, 10 October 2012

Source - Edexcel GCSE ICT Student book

Highest energy
consumption
Watching Internet TV
 
Using GPS when meeting friends
 
Surfing the Internet
 
Talking to friends
 
Using the calculator
 
Taking photos
Lowest energy
consumption
Sending text messages

 

Fashion Phones
Fashion phones can be different shapes and have the ability to be customised. Buttons may be in odd places and may not be inconvenient to use. They can be bright colours and highly designed, appealing to the fashion-conscious person.
Features often include high-spec cameras, the ability to store large amounts of data like photos and videos, and speakers that allow music to be played out loud. The batteries are designed to last longer but can be bulky, often making the phone larger.

Business Phones
Business phones use a slim, sleek design, usually in black or metallic colours. They have large screens and an integrated, full QWERTY keyboard.
Features often include speaker phone, voice activated dialling, the ability to synchronise it with other devices like netbooks and laptops, large screens to enable work on data files, GPS to get the user to unfamiliar destinations with ease, camera, PDA, and 3G compatibility for internet access – allowing users to carry one device rather than many.

Multifunctional Phones
Multifunctional phones combine both style and business features, appealing to the mass market rather than a niche. They have the best of both worlds: high-spec features, large amounts of storage, high-speed processing, slim design with touch screens and access to the internet.

New audience - The elderly have not had phones to fit in with their needs; a lot of phones nowadays are too complicated for the elderly to understand as a whole. Although a minority do actually understand the new technology mobile phones have within them, they are more likely to use less advanced mobile phones. There are several factors which need to be altered in order to suit the elderly, Weight of phone, Interface, Screen resolution, Navigation or menu system, Number of features available, ‘Panic button’ to reach relatives easily, Volume capacity of speakers, Size of screen and buttons.

Concerns of a 10 year old having a mobile phone

·         Texting too much can lead to repetitive strain injury (RSI)

·         Mobile phones have not been around for long, so scientists are unsure of the risks associated with using them. As a precautionary measure, government health advisers recommend that children under 16 should not use mobile phones regularly.

·         Overuse of ‘text speak’ could have an impact on the ability to spell words correctly.

·         Young people can be the victims of bullying and crime if they are targeted for their phone.

·         If the mobile phone has Internet access, the child will be able to access almost every website there is, mobile phones lack the ability to block websites not suitable for children.

Friday, 5 October 2012

Image Types

Monochrome Bitmap -
A Monochrome bitmap is black and white
bitmap file. A monochrome bitmap is a rectangular grid of pixels, but each pixel is represented by a single bit. Eight pixels are in each byte of the bitmap. Monochrome bitmaps are often used for bitmapped text or single-colored images.

16/24/256 Colour Bitmap -
A representation in which each item corresponds to one or more bits of information, esp. the information used to control the display of a computer screen. The more bits there are, the bigger the file size and the higher the definition of the image.

JPEG -
In computing, JPEG is a commonly used method of lossy compression for photographic images. The degree of compression can be adjusted, allowing a selectable tradeoff between storage size and image quality. JPEG typically achieves 10:1 compression with little perceptible loss in image quality.

GIF -
The Graphics Interchange Format (GIF) is a bitmap image format that was introduced by CompuServe in 1987 and has since come into widespread usage on the World Wide Web due to its wide support and portability. It is a popular format for image files, with built-in data compression.

TIFF -
Tagged Image File Format (abbreviated TIFF) is a file format for storing images, popular among Apple Macintosh owners, graphic artists, the publishing industry, and both amateur and professional photographers in general. As of 2009, it is under the control of Adobe Systems.

PNG -

Portable Network Graphics (PNG) is a bitmapped image format that employs lossless data compression. PNG was created to improve upon and replace GIF (Graphics Interchange Format) as an image-file format not requiring a patent license.

Wednesday, 3 October 2012


The table shown below shows all of the possible options of buying a 64GB iPhone 5 from certain Mobile Phone providers (Orange, TMobile, O2 and Vodafone) I have collected all the data from each of the four websites and sorted it out on this speadsheet. The spreadsheet shows the inital cost of a 64GB iPhone 5, the amount of calls (minutes) texts, Internet, Monthly cose and Plan length.

Network64 GB iPhone 5CallsTextsInternetMonthly costPlan length
Orange £ 269.99 UnlimitedUnlimited 1GB £ 36.00 24 Months
Orange £ 209.99 UnlimitedUnlimited 2GB £ 41.00 24 Months
Orange £ 179.99 UnlimitedUnlimited 3GB £ 46.00 24 Months
Orange £ 129.99 UnlimitedUnlimited Unlimited £ 51.00 24 Months
T-Mobile £ 269.00 2000 + Unlimited TMobile callsUnlimited Unlimited £ 36.00 24 Months
T-Mobile £ 219.00 UnlimitedUnlimited Unlimited £ 41.00 24 Months
T-Mobile £ 189.00 UnlimitedUnlimited Unlimited £ 46.00 24 Months
T-Mobile £ 139.00 UnlimitedUnlimited Unlimited £ 61.00 24 Months
O2 £ 249.99 UnlimitedUnlimited1GB £ 26.00 24 Months
O2 £ 199.99 UnlimitedUnlimited1GB £ 31.00 24 Months
O2 £ 99.99 UnlimitedUnlimited1GB £ 36.00 24 Months
O2 £ 49.99 UnlimitedUnlimited1GB £ 41.00 24 Months
O2 Free UnlimitedUnlimited1GB £ 46.00 24 Months
O2 Free UnlimitedUnlimited1GBFree24 Months
Vodafone £ 169.00 UnlimitedUnlimited2GB £ 47.00 24 Months
Vodafone £ 229.00 UnlimitedUnlimited2GB £ 42.00 24 Months
Vodafone £ 289.00 UnlimitedUnlimited1GB £ 37.00 24 Months
Vodafone £ 329.00 600 MinutesUnlimited500MB £ 33.00 24 Months
Vodafone £ 319.00 1200Unlimited1GB £ 51.00 12 Months
Vodafone £ 379.00 900Unlimited1GB £ 46.00 12 Months
Vodafone £ 439.00 600Unlimited1GB £ 41.00 12 Months
Vodafone
£ 499.00
300Unlimited500MB £ 36.00 12 Months