ict revision- chapter 2

8/3/2019 ICT Revision- Chapter 2

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ICT Revision- Chapter 2Stephanie Smith


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Planning a trip

Before making a booking:

Carry out as much research as possible Read customer reviews and traveller blogs


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Schools and Biometric

Biometric:

Used in many schools Identify students when buying meals

Pupils fingerprints are scanned into system

Sensor then reads them when food is brought and

compares them with those stored


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Biometrics

Biometric- an automated method which is used to

recognise a person. This is based on physicalcharacteristics.

Features that are measured include- face,fingerprints, hand geometry, iris and voice


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Passports Passports contain a microchip This chip is an RFID (Radio Frequency

Identification) chip

This stores the users photograph and all theirpersonal info. They were introduced to increase security

At the airport: At passport control:

The access code is scanned which holds all thepersonal information

The reader- communicates with the chip and thecustoms official can view the stored image

Face- automatically recognised by biometric software


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What does the microchip do?

It is a miniature electronic circuit

It is used to control computers and most otherelectronic devices


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Keeping in touch

How can you send messages when away?

Phone calls Text (SMS) and MMS

Emails

Social networking sites e.g. Twitter

Blogs


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Keeping in touch

How can you send photos when online?

Send MMS Attach to email

Upload to online album

Upload to social networking site e.g. Facebook

Upload to Blog


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Netbook Features

Light, robust, easily portable Solid state hard drives

SD cards for data storage

Small 10-inch monitor Large keyboard USB connections

WiFi connection for the Internet Microphone and speakers Browser software Long battery life


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Advantages of using Netbooks inschools Easily fitting into bag because of design

Thieves- unable to tell that its a netbook asopposed to school books

There would be enough space on a desk for anetbook and text book

They boot up in just over 20 seconds of beingswitched on

Theyre WiFi enabled therefore can remainlogged in to it as they move around the school


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Transferring images

Methods of transferring photos from camera/mobilevia:

Bluetooth- allows exchange of data over shortdistances from fixed and mobile devices. However forthem to communicate the devices must be able tounderstand the Bluetooth rules (protocols)

USB (Universal Serial Bus)- can connect devicessuch as keyboards to a computer

Flash Memory Card- Known as a solid state storagedevice i.e. There are no moving parts. Everything iselectronic as opposed to mechanical therefore ideal formobile devices


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Connecting to the internet

Ways to connect to the internet from computers:

By Cable Using a wireless connection

Cyber Cafes:

This is a cafe/ coffee shop that has a number of

personal computers. These are connected to theinternet and are available to use by customers.There are usually charges e.g. By the hour.


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WiFi access

Across the world in towns and cities, there are

places where you can useW

iFi connection to theinternet for free.

These places are mainly located in restaurantssuch as McDonalds as well as hotels and cafes

such as Starbucks. These places are known as wireless hotspots


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Online photo albums

This can be used instead of emailing copies of

photos to friends. The albums allow access to the people they want

to show.

Uploading as well as storing images online is a

safer method than simply keeping them on acamera or netbook.

This means theyre still available even if they getdeleted or stolen.


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Cloud computing

This is a system where computer programs and

data are stored centrally To access it all, all you need is a internet

connection and an input device

Because of this, theres no need to buy/install

expensive software/ powerful computers andhard disk drives


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Recent keywords

Hotspot- a venue that offers WiFi connection

Cloud computing- a system which all computerprograms and data is stored on a central serverwhich is owned by a company such as Googleand accessed virtually

Web app/application- any applicationaccessible using a web browser. It can be assimple as a message board or guest sign-in pageon a website or as complex as a spreadsheet


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GPS- sat navs

This is a device which is usually used within a car. Itgives directions which are based on information

received from a series of satellites GPS is satellite-based and is made up of 24 satellites

The GPS receiver compares the time a signal wastransmitted with the time it was received

W

ith this time difference, the GPS receiver tells howfar away the satellite is With the distance measurements from at least 3

satellites, the users position can be determined by thereceiver and displayed on the sat nav units electronic

map.


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Convergence

One of the features of modern digital devices

This is where one device is developed so that itcan carry out functions that were originallyperformed by other devices

E.g. Mobiles primary function was to make calls

however it can now be used for other things Examples could be taking photos, listening to

music etc They now are beginning to have GPSfacilitates


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Convergence and GPS GPS can now be used to link an online photo album The images have exact geographical coordinates of

where the photograph was taken (allowed by GPS) It allows you to take a picture and then store things

like time, data, camera type, speed and exposure onthe file

This information is known as metadata If you double click on the GPS latitude, Google Maps

opens up and shows exactly where the picture was

taken (You are able to geotag images by creating free

online albums using e.g. Google docs and then useGoogle Earth to geotag them)


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GPS Tracking

Vans within a company such as post are fitted

with a GPS system as well as a modem so thattheir location can be constantly sent via themobile phone network to the firms computersystem


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Privacy Issues

The technological developments can lead to newissues

Examples of this: The GPS tracking devices has allowed a mother to

track her sons whereabouts on his gap year While travelling in Thailand, Australia and South

Africa, see insisted him to wear a tracker so she couldlog onto a website and find his exact location

Questions asked by this were following the lines ofwhether the mother was violating the sons privacywith the help of his tracking device


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Being safe when going on holiday

Scammers check peoples blogs/ social

networking sites to see where they are onholiday

They send emails to you and your family,supposedly from you saying that you have lost all

your money and possessions The scammers then ask your family to send a

money transfer and then pick it up

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