robertj@tekgen.bv.tek.com (Robert Jaquiss) (05/13/91)
Index Number: 15498
Design Philosophy
For LIAISON by DU-IT CSG, Inc.
A Full Function Computer Work Station
David Bayer, Rick Nash, John Springsteen
DU-IT Control Systems Group, Inc.
Shreve, Ohio 44676
LIAISON is an alternative keyboard/emulator which allows a high-
level SCI quadriplegic to independently operate all functions of
a computer. It displays a keyboard as well as other functions
information on a color monitor positioned to one side of the
computer work screen. Typically, LIAISON is remotely operated
(by infrared) from a DU-IT SCI wheelchair control system. It is
also operable using only a DU-IT proportional controller plus an
adapter. Direct pointing with a small movement proportional
joystick allows the operator to type a rate of 7 - 15 words per
minute (letter by letter typing). LIAISON includes level-style
memory functions (large macros), environmental control functions,
and permits the user to lay out his own keyboards. Any software
(or software combination) that an able bodied person might use,
the disabled user can operate, including those requiring
graphical inputs.
The primary design criteria were:
1. Independent utilization within the routine of daily
living.
2. Independent operation of all processes relating to the
computer.
3. Practical availability of ancillary functions commonly
used while at the computer.
4. Operating rules that are self-apparent, easy, and
consistent.
5. User ability to operate any software that anyone else
might use.
6. A control process workable for quadriplegics from C-4 to
C-1.
7. Emulation useable with various different computers.
8. Compatibility with present and future DU-IT wheelchair
systems.
9. A general device maleability under the user's control.
For more information, call Barbara Heinrichs, Information
Manager, at (216) 567-2906, or write: DU-IT Control Systems
Group, Inc., 8765 Township Road 513, Shreve, Ohio 44676-9421.