ICT Homework 3

Biometric Applications

Biometrics is the technology, which uses various individualistic attributes of a person to verify his or her identity. Various attributes include fingerprints, geometrical shapes of hands, retina, and iris in the eyes and so on. Biometric test offers a full-proof and highly secure method of verification to avoid security breech and unauthorized access to critical data and places. The characteristics used by biometrics technology are divided into two groups - physiological and behavioural.

• Physiological characteristics involve face recognition, handprints and fingerprints, veins in hands, capillary vessels in eyes and so on.
• Behavioralcharacteristics involve voice modulations, handwriting and signature style, and keystroke dynamics.

Fingerprint Reader & Scanner

 Biometric fingerprint reader or scanner is certainly the most appreciable achievement of this technology, which is sprouting as a breakthrough in security provisions. Based upon storing and comparing the key points of one’s fingers, these devices have proved their potential in areas like access control and employee attendance management.

Face Recognition 

Face recognition is becoming popular with companies suffering from loss of information and decrease in productivity due to inappropriate security measures. At the same time, big organizations, airports and other high-alert areas are also developing fondness towards the technology. Face recognition technology is indeed the most appreciable application of biometrics, as it offers significant improvement over existing security products.

ICT Homework 2

                    Bluetooth 

Bluetooth is a proprietary open wireless technology standard for exchanging data over short distances (using short wavelength radio transmissions in the ISM band from 2400-2480 MHz) from fixed and mobile devices, creating personal area networks (PANs) with high levels of security. Created by telecoms vendor Ericsson in 1994,it was originally conceived as a wireless alternative to RS-232 data cables. It can connect several devices, overcoming problems of synchronization.

Bluetooth is managed by the Bluetooth Special Interest Group, which has more than 15,000 member companies in the areas of telecommunication, computing, networking, and consumer electronics. The SIG oversees the development of the specification, manages the qualification program, and protects the trademarks.To be marketed as a Bluetooth device, it must be qualified to standards defined by the SIG. A network of patents is required to implement the technology and are only licensed to those qualifying devices; thus the protocol, whilst open, may be regarded as proprietary.

Bluetooth is a standard wire-replacement communications protocol primarily designed for low power consumption, with a short range (power-class-dependent, but effective ranges vary in practice; see table below) based on low-cost transceiver microchips in each device. Because the devices use a radio (broadcast) communications system, they do not have to be in visual line of sight of each other, however a quasi optical wireless path must be viable.

ICT Homework

portable entertainment devices,shuch as:mp3 or DVD-players,which
allow people to listen to music or watch films, are now commonplace.
what do you think are the main advantages and disadvantages of 
this development?



MP3 Players:
-Advantages:-
1-It is portable.
2-Its used for viewing images and pictures.
3-We can record anything we want with the mp3 player.
4-Listening to the radio is also a use of the mp3 player.
5-Watching videos.


-Disadvantages:-
1-We must use headphones.
2-The screen is small.
3-The vision is not clear.
4-The memory space is not enough.
5-we have to recharge it continuously.


DVD Players:
-Advantages:-
1-It has a USB port.
2-IT has a wierless connection.
3-We canlisten to music.
4-High definition.


-Disadvantages:-
1-It doesnt play all formats of videos.
2-Most of the dvd players have connected to a television.

Mobile phones

A mobile phone allows calls into the public switched telephone system over a radio link. Early mobile phones were usually bulky and permanently installed in vehicles; they provided limited service because only a few frequencies were available for a geographic area. Modern cellular "cell" phones or hand phones make use of the cellular network concept, where frequencies are re-used repeatedly within a city area, allowing many more users to share access to the radio bandwidth. A mobile phone allows calls to be placed over a wide geographic area; generally the user is a subscriber to the phone service and does not own the base station. By contrast, a cordless telephone is used only within the range of a single, private base station.

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