Interaction Devices

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Interaction Devices

• By
• Michael Huffman
• Kristen Spivey

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Interaction Devices

• 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

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Types of Keyboards

• 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.

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Types of Keyboards

• 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.

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Comparison
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Pointing Devices

• 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.

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Examples of Pointing Devices

• Direct Pointing Devices
• Light pens and touch screens
• Indirect Pointing Devices
• Mouse and trackball

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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
  users voice
• Speech generation is much easier and can be used
  quite effectively

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Active Interaction Devices

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

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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.
• 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.

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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 (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.

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Mice

• 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.

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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.
• 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.

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Biological Input Sensors

• 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.

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Biological Input Sensors

• 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 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 complete biosensor should be cheap, small,
  portable and capable of being used by
  semi-skilled operators.
• There should be a market for the biosensor.

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References

• http//search.acclaimimages.com
• http//archive.ncsa.uiuc.edu/Cyberia/VETopLevels/V
  R.Interface.html
• http//www.lsbu.ac.uk/biology/enztech/biosensors.h
  tml
• www.wikipedia.org
• http//www.tks.buffalo.edu/scomings/Sgc/9704-1a.g
  if