1. Interaction Devices By: Michael Huffman Kristen Spivey

2. Interaction Devices: Term used to cover various devices developed to interact with a computer that users actively utilize in order to perform tasks. Examples: Term used to cover various devices developed to interact with a computer that users actively utilize in order to perform tasks. Examples:  Keyboards  Pointing devices  Speech recognition and digitization  Virtual Reality

3. Types of Keyboards QWERTY keyboard design QWERTY keyboard design – is the most common modern-day keyboard layout on English-language and typewriter keyboards. –It takes its name from the first six letters seen in the keyboard's top first row of letters.

4. Types of Keyboards The Dvorak keyboard layout became easier to access in the computer age. The Dvorak keyboard layout became easier to access in the computer age. –Currently, all major Operating Systems (such as Mac OS X, Microsoft Windows, GNU/Linux and BSD) ship with Dvorak keyboard layout in addition to the standard QWERTY layout. So far, DSK (Dvorak Simplified Keyboard) has failed to displace the QWERTY standard. So far, DSK (Dvorak Simplified Keyboard) has failed to displace the QWERTY standard.

5. Comparison

6. Pointing Devices These are any computer hardware components that allow a user to insert spatial data into a computer. These are any computer hardware components that allow a user to insert spatial data into a computer. –Computer-aided design systems and graphical user interfaces allow the user to control and provide data to the computer using physical movements- point, click, and drag -by moving a hand-held mouse across the surface of the physical desktop and activating switches on the mouse. –Movements of the pointing device are echoed on the screen by movements of the mouse pointer or cursor and other visual changes.

7. Examples of Pointing Devices Direct Pointing Devices Direct Pointing Devices –Light pens and touch screens Indirect Pointing Devices Indirect Pointing Devices –Mouse and trackball

8. Speech Recognition and Digitalizing –Used where it is necessary for the user to have both hands free and for the handicapped –The system must be trained to recognize the user’s voice –Speech generation is much easier and can be used quite effectively

9. Active Interaction Devices Devices used with virtual reality. Virtual reality departs from the Human-Computer Interaction (HCI) Devices used with virtual reality. Virtual reality departs from the Human-Computer Interaction (HCI) Different types of devices used with virtual reality: Different types of devices used with virtual reality: –Gloves –Mice and Joysticks –Biological input sensors

10. Gloves Data glove aka wired glove is a glove-like input device for virtual reality environments. Various sensor technologies are used to capture physical data such as bending of fingers. Data glove aka wired glove is a glove-like input device for virtual reality environments. Various sensor technologies are used to capture physical data such as bending of fingers. –Often a motion tracker, such as a magnetic tracking device is attached to capture the global position / rotation data of the glove. These movements are then interpreted by the software Gestures can then be categorized into useful information, such as to recognize Sign Language or other symbolic functions.

11. Gloves The Power Glove is based on the patented technology of the VPL Dataglove, but with many modifications that allowed it to be used with slow hardware and sold at an affordable price. The Power Glove is based on the patented technology of the VPL Dataglove, but with many modifications that allowed it to be used with slow hardware and sold at an affordable price. –The Power Glove (1989) is a controller accessory for the Nintendo Entertainment System. It was the first interface controller to recreate human hand movements on a television or computer screen.

12. Mice In computing, a mouse functions as a pointing device by detecting two- dimensional motion relative to its supporting surface. In computing, a mouse functions as a pointing device by detecting two- dimensional motion relative to its supporting surface. –It sometimes features other elements, such as "wheels", which allow the user to perform various system-dependent operations, or extra buttons or features can add more control or dimensional input. The mouse's motion typically translates into the motion of a pointer on a display.

13. Joysticks A joystick is a personal computer peripheral or general control device consisting of a handheld stick that pivots about one end and transmits its angle in two or three dimensions to a computer. A joystick is a personal computer peripheral or general control device consisting of a handheld stick that pivots about one end and transmits its angle in two or three dimensions to a computer. Joysticks are often used to control video games, and usually have one or more push- buttons whose state can also be read by the computer. Joysticks are often used to control video games, and usually have one or more push- buttons whose state can also be read by the computer.

14. Biological Input Sensors A biosensor is an analytical device which converts a biological response into an electrical signal. A biosensor is an analytical device which converts a biological response into an electrical signal. The term 'biosensor' is often used to cover sensor devices used in order to determine the concentration of substances and other parameters of biological interest. The term 'biosensor' is often used to cover sensor devices used in order to determine the concentration of substances and other parameters of biological interest.

15. Biological Input Sensors A successful biosensor must possess at least some of the following beneficial features: A successful biosensor must possess at least some of the following beneficial features: The biocatalyst must be highly specific for the purpose of the analyses. The biocatalyst must be highly specific for the purpose of the analyses. The reaction should be as independent of such physical parameters as stirring, pH and temperature as is manageable. The reaction should be as independent of such physical parameters as stirring, pH and temperature as is manageable. The response should be accurate, precise, reproducible and linear over the useful analytical range, without dilution or concentration. The response should be accurate, precise, reproducible and linear over the useful analytical range, without dilution or concentration. The complete biosensor should be cheap, small, portable and capable of being used by semi-skilled operators. The complete biosensor should be cheap, small, portable and capable of being used by semi-skilled operators. There should be a market for the biosensor. There should be a market for the biosensor.

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