Task1
Read and make notes where possible of computer input devices.
You may use the link below:
http://www.computerhope.com/jargon/i/inputdev.htm
Describe any unique input devices used in different IT systems in any of the application scenarios.
Task 2
Research on the assigned input/output device below and post your findings on this blog. In your research
i) Describe how the device works or how it is used
ii) Outline areas where the device is commonly used
iii) Name any different types or categories of the device if any
Fatema: MICR readers
George:mouth wands
Barry:Smart Card readers
Caleb:radio frequency identification (RFID)
Sohali: Sensors readers
Emmanuel: Plotters
William: Printers
Solitei:Projectors
Khalid:MFP printers
Mayur: Eyegaze System
Jamil:blow pipe systems
Jamal:Braille keyboards
Sadruddin:VR goggles
Sheehan:Magnetic stripe Readers
28 comments:
asdfgtyt
MFP printer:
Definition: Multifunction printers are capable of producing paper output from several sources and inputting images into a computer.Multifunction printers can act as a printer, a scanner, a fax machine and a photocopier.
they're less expensive than buying three or four separate devices. The downsides to combining all these functions in one device are:
# If the device breaks, you may lose all of its functions at the same time.
# You can only do one operation at a time. For example, you can't print a document and receive a fax simultaneously.
these types of printers are used in schools because they re cheaper. they are also used in offices.
Virtual Reality Goggles: Virtual Reality goggles make the movie or television show you're watching look like a 3-D scene that's happening right in front of you. With objects flying off the screen and careening in your direction, and creepy characters reaching out to grab you, wearing 3-D glasses makes you feel like you're a part of the action - not just someone sitting there watching a movie. Considering they have such high entertainment value, you'll be surprised at how amazingly simple 3-D glasses are.
In this article, we'll take a look at the two most popular types of 3-D glasses in use today. But first, let's take a look at something called binocular vision. The binocular vision system relies on the fact that our two eyes are spaced about 2 inches (5 centimeters) apart. Therefore, each eye sees the world from a slightly different perspective, and the binocular vision system in your brain uses the difference to calculate distance. Your brain has the ability to correlate the images it sees in its two eyes even though they are slightly different. Two cameras photograph the same image from slightly different positions to create these images. Your eyes can correlate these images automatically because each eye sees only one of the images.
In virtual reality, the system uses stereoscopic goggles that provide the 3D imagery and some sort of tracking device, which may be the goggles themselves for tracking head and body movement, or a "data glove" that tracks hand movements. The glove lets you point to and manipulate computer-generated objects displayed on tiny monitors inside the goggles.
A magnetic stripe reader is a hardware device that reads the information encoded in the magnetic stripe located on the back of a plastic card.
Common uses include: Smart card readers in supermarkets, credit card readers, and other cards like that..
Magnetic stripes store data by modifying the magnetism of tiny iron-based magnetic particles on a band of magnetic material on the card. The magnetic stripe, sometimes called swipe card or magstripe, is read by physical contact and swiping past a magnetic reading head, which is located in a magnetic stripe reader
ITGS DP1 (Hardware):
Plotter printers
A plotter is a computer hardware, used for printing vector graphics. This output device has been replaced with wide-format conventional printers, was utilized for computer-aided design.
Plotters can be a component added to a computer system and in some cases, they may have their own internal computer.
Plotters employ the shading art style of hatching; which means that the material cv where by every things is printed via fine line art. This device prints very slowly, as it used a thin somewhat pen, and it
can draw complex line art, including text, and colour a wide region of color by drawing mutliple regular lines close together.
The main purpose of using a plotter, is to print hard copies of large pages, sizing A1 and A2. The expensive hardware is used for the production of construction maps, engineering drawings, architectural plans and business charts.
Plotter printers are used by professional and not the common man. They are used by large companies that print posters, amd other material mentioned above.
The Tongue Drive System for the Disabled
The tongue drive system is a system designed for disabled persons. It basically allows disabled people to live more independent lives by giving them the ability to control a computerized wheelchair using their tongues.
They system is designed for severally paralized such as those with spinal chord injuries. They rely on others to help them survive. However, such as system would allow them to live more independent and productive lives.
To operate the tongue drive system, disabled users would only need to be ale to move they tongues. A small magnet that is the size of a grain of rice is attached to the persons tongue by implantation where is it pierced onto the tongue. The piercing will allow the motion of the tongue to control the movement of a cursor across a computer screen or a powered wheelchair around a room.
The tongue was chosen to operate the system simply because unlike the hands and feet that are controlled by the spinal cord, the tongue is directly connected to to the brain by the cranial nerve. Therefore, even with spinal cord injuries will be able to operate it. Tongue movements are also quite fast and are quite accurate and so do not require much thinking, concentration or effort.
The movement of the magnetic tracer that is attached to tongue is detected by an array of magnetic field sensors that are mounted on a headset outside the mouth or an orthodontic brace inside the mouth. The sensors output signals are wirelessely transmitted to a portable computer that can be carried with the users clothes or wheelchair.
The output signals are processed to determine the motion of the magnet in real time. The information is then used to control the movement of the cursor on the computer screen or to substitute the joystick function in a powered wheelchair.
The system can potentially capture a large number of tongue movements, each of which can represent a different user command. A unique set of specific tongue movements can be tailored for each individual based on the user’s abilities, oral anatomy, personal preferences and lifestyle.
“An individual could potentially train our system to recognize touching each tooth as a different command ,” explained Ghovanloo. “The ability to train our system with as many commands as an individual can comfortably remember is a significant advantage over the common sip-n-puff device that acts as a simple switch controlled by sucking or blowing through a straw.”
The tongue device system does not require brain surgery like other brain interface technology and is 100% Accurate in terms of direction.
Information acquired and adapted from: http://gtresearchnews.gatech.edu/newsrelease/tongue-drive.htm
mayur dave please don't post unnecessary things.
TO KHALID: TOO LITTLE INFORMATION! EXPAND PLEASE!
soli tutz; stop Crtl+C, and Crtl+P! your in IB
to Sohail n Jamal, it is a very simple device thats all you need to know. there is not much to say. if you want to know more please go make ure own research!.
TO KHALID: ITS "GO DO YOUR OWN RESEARCH" NOT "GO MAKE YOUR OWN RESEARCH"!!!!!
Projectors
Introduction:
A projector is an output device that is used to project images from a computer or video device onto a wall screen for large image viewing. It integrates the use of a light source, optics system, electronics and display(s) in order to project the images onto the screen wall clearly. Their are different types of projectors in the market that different resolutions, performance and features depending on the intended audience it is aimed for. Projectors connect to computers/video devices just as you would connect a normal monitor.
How projectors work:
LCD projectors: LCD projectors work by having a bulb set up to shine a fairly powerful light through a prism. The prism splits the light into its component colors and these are sent through small LCD screens. The screens themselves are sent signals to allow just so much of the light through at specific pixel locations. The light is then beamed through a lens onto a screen where the images can be seen by the human eye.
DPL projector (Digital Light Processing is a bit more complex) : Unlike an LCD projector This time the light is shined through a spinning color wheel onto a chip that is mounted with hundreds of thousands of tiny mirrors. The mirrors are turned off or on by electronic impulses according to the need for the color at that moment. Even though only one color is shown at a time, one color follows another so quickly that the primary colors seem to blend into the appropriate color. The image appears to be constantly lit, when in fact small parts of it are constantly flickering.
Areas where the device is commonly used:
The common areas where projectors are used include:
• Screening films in cinemas e.g. in Nyali cinemax
• During company board meetings
• During video game competitions e.g. EA Fifa 10 competition
• In classroom work e.g. in our own school AKAM
• For common multimedia entertainment uses e.g. playing multiplayer video games e.t.c.
Different projector catergories:
• Image projector- a device that projects an image on a surface
• Video projector- a device that projects a video signal from computer, home theater system etc.
• Movie projector- a device that projects moving pictures from a filmstrip
• Slide projector- a device that projects a still image with a transparent base
• Overhead projector- a device that projects a transparent image
Information downloaded from:
• http://projectors.indepthinfo.com/how-projectors-work.shtml
• http://www.presentationsolutions.ca/projectors_glossary.php
• http://www.ehow.com/about_5523806_uses-overhead-projectors.html
tutz; your info iz nt urz...your references shud b, another place to see dis exact info, are the websites below
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