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2009 ASEE Conference Presentation
Citation preview
Development of a Nanoscale Virtual Environment Haptic
Interface for Teaching Nanotechnology to Individuals
who are Visually Impaired
Dianne Pawluk1, Curtis Taylor2, Marcia Hoffman1 and Maria McClintock1
1Dept. of Biomedical Engineering, Virginia Commonwealth University
2Dept.of Mechanical and Aerospace Engineering, University of Florida
With support from the National Science Foundation
VCU
2009 ASEE Annual Conference and Exposition
22009 ASEE Annual Conference and Exposition 2
Outline of Presentation
• What is haptics?• Motivation for using haptics to teach
nanotechnology• Background• Learning Modules• Preliminary Results• Future Plans
32009 ASEE Annual Conference and Exposition
Traditional Teaching of Abstract Science and Nanotechnology
3
Traditional methods of teaching• lectures• rely on 2-D diagrams or display• poor engagement of students• difficult to conceptualize• more difficult for visually impaired
molecular machine
materialstructure
atomic structure
New methods needed to increase engagement and perception
42009 ASEE Annual Conference and Exposition 4
What is haptics?
• The combination of:
• Perception of forces and position
• Sense of touch
52009 ASEE Annual Conference and Exposition 5
Why Nanotechnology, Why Haptics?• Governments, educators and researchers
– Future demand for employees– Diversity
• educate, attract
• Students who are blind or visually impaired– No one can see what goes on at the
nanoscale– Pictures are not very intuitive in
describing forces• inclusiveness, opportunity
• Sighted students– Considerable portion haptic learners
• engaged, interest The first atomic force microscope
62009 ASEE Annual Conference and Exposition 6
Virtual Reality System with Haptics
• for a wide range of ages, compare to something familiar• include individuals who are blind or visually impaired,
sonification
72009 ASEE Annual Conference and Exposition 7
State-of-the-art in Haptics
Novint Falcon • affordable force feedback device, with position information• easily replicated in a classroom• allows for interactive, multi-sensory exploration of nanoscale concepts for sighted and visually impaired
Phantom (> $10,000) SideWinder (< $50)
Novint Falcon (< $200)
Haptics• training• surgery, flying aircraft, etc.• tele-nanomanipulation• teaching
82009 ASEE Annual Conference and Exposition 8
1. Size and Scale
2. Dominant Forces
3. Structure of matter
4. Instrumentation
5. Nanomachines
6. Nanoscale Fabrication
What are the big ideas in nanotechnology?S
cien
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92009 ASEE Annual Conference and Exposition 9
• Understanding of size continuum helps understand matter and materials
• Idea: controllably “zoom in” on objects that are familiar
• Implementation
– represent objects at different scales by gray-scale images
» intensity = height
– graphics
» triangular tesselation in openGL
– Haptics
» F = kvirtual* dpenetration
Module 1: Size and Scale
10
2009 ASEE Annual Conference and Exposition 10fo
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Module 2: Dominant Forces
Macroscale
Nanoscale
• gravity• inertia
• van der Waal• adhesion forces (electrostatic, capillary, etc.)
Properties of matter change with scale
Preliminary ResultsFor Teaching Nanoscale Science and Engineering
Falcon Force-Feedback Controller
Touching AtomsInteractive NanofabricationUnderstanding Atomic Potentials
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F = −AHR
6z2
12
2009 ASEE Annual Conference and Exposition 12
• Developed new haptic-based, interactive simulations to teach abstract science and nanotechnology concepts • Developed learning modules to teach concepts of
• size and scale• dominant forces
• Demonstrated to prototype to elementary school, undergraduate and graduate students
• extremely positive reaction
• Will validate using: • cognitive measures • affective measures • compare to: vision alone and traditional methods
Conclusion