Voltage Controlled Oscillator Design in SiGe HBT for Radiation

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					Assistive Computer Interface for
Reading and Composing E-mail
             Adilson Cardoso
             Sedrick Dongmo
              Pranav Ghei
               Andre Nasri
              Vrajesh Patel
               Ana Yepes
    Presented at Roswell Nursing Home and
             Rehabilitation Center
               October 25, 2008
Project Overview

 • Design and implement a system to allow Ron
   Fowler to read and compose e-mails

 • Create a customized solution that is cost-effective
   and addresses Ron’s needs

 • Kiwanis International is sponsoring the project

 • Projected design cost is approximately $1,500
Design Constraints

 Patient’s Limitations
   •   Wheelchair-bound
   •   Motor skills
   •   Speech
   •   Living environment
Patient’s Strengths

   •   Educated
   •   Horizontal neck motion
   •   Control of left index finger
   •   Vertical foot control
Design Features

 The proposed design includes the following
 features
   •   Non-invasive
   •   Robust and lightweight
   •   Comfortable and easy-to-use
   •   Cost-effective
   •   Easy to set up and maintain
   •   User-friendly
Live Demonstration
System Diagram
System Diagram
System Diagram
System Diagram
Webcam – Keyboard Navigation

                 • High resolution
                 • Autofocus




    Left                             Right
   Head                              Head
   Motion                            Motion
Magnetic Sensor – Key Selection



Wireless Mouse             Magnetic Sensor
  Wide range               Accuracy in output
    Durable                 Power efficient
Foot Pedal – Toggle
Software – Predictive Text

Word recommendations are given in real-time as the
user types using the on-screen keyboard
Scalability




 How well a solution to a problem will work
 when the size of the problem increases
Scalability Measures

 The software is designed to serve as a framework
 for future students to easily develop additional
 applications for the user, which may include
   •   On-screen keyboard with multi-tap
   •   Head-controlled navigation of buttons
   •   Toggling between on-screen keyboard targets
   •   Predictive text technology
   •   Application switcher
Design Summary

 HARDWARE    INTERFACE      PERSONAL
                            COMPUTER
              USB Cable     SOFTWARE
  Webcam
                             Customized
                               E-mail
                             Application
  Magnetic   Wireless USB
   Sensor

   Foot       USB Cable
                             On-screen
   Pedal                     Keyboard
Advantages and Disadvantages

 Advantages
   •   Non-invasive
   •   Customized
   •   Cost-effective
   •   Durable enclosure
 Disadvantages
   •   Training and practice required
   •   Preliminary design
Problems and Issues

 Compatibility
    • Connect the webcam to the head-tracking software
    • Future compatibility of hardware and software components

 Sensitivity
    • Translation of physical movement into software interaction
    • Trade-off between user interface button sizes and usability

 Interference
    • Wireless signal interruption due to enclosure
    • Disruption of the magnetic sensitivity due to the enclosure
Tentative Project Schedule

      Oct. 25         Preliminary design presentation
  Oct. 26 – Nov. 08   Complete design and assembly
      Nov. 08         Test modified design at nursing home
  Nov. 09 – Nov. 14 Troubleshooting problems
      Nov. 15         Training with Ron
  Nov. 16 – Nov. 24 Improve design
  Nov. 25 – Dec. 05 Final presentation and demonstration
  Nov. 26 – Dec. 02 Finalize documentation
      Dec. 03         Final project report
Completed Tasks

  •   Experiments were carried out to analyze Ron’s
      strengths
  •   Five input sources were used, three of which were
      suitable for Ron
Current Status

 •   Predictive text technology is currently being
     developed
 •   The on-screen keyboard and its interaction with
     the hardware will be improved
 •   An e-mail application will be created
Questions?

				
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posted:10/4/2011
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