Portfolio

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Portfolio

  1. 1. Snapshot and Selected Works Tao Zhang [email_address]
  2. 2. Current Position <ul><li>09/01/2009- present </li></ul><ul><li>Research Associate, Electrical Engineering and Computer Science Department, Vanderbilt University </li></ul><ul><li>System of Human-Robot Interfaces for Emergency Response Teams </li></ul><ul><ul><li>Single operator controlling multiple heterogeneous robots. </li></ul></ul><ul><ul><li>Automation and situation awareness support. </li></ul></ul><ul><ul><li>Information visualization and abstraction. </li></ul></ul>
  3. 3. Current Position <ul><li>Human Performance Modeling for Human-Robot Peer-Based Teams </li></ul><ul><ul><li>How people work differently with human and robot teammate in a triage (first aid medical assessment) scenario </li></ul></ul><ul><ul><ul><li>Workload: Heart rate variability, subjective response, computer modeling </li></ul></ul></ul><ul><ul><ul><li>Trust, communication efficiency </li></ul></ul></ul>
  4. 4. Previous Positions <ul><li>08/2006-08/2009 </li></ul><ul><li>Research Assistant, Cognitive Ergonomics Laboratory, North Carolina State University </li></ul><ul><ul><li>Situation Awareness and Mental Models [Dissertation] </li></ul></ul><ul><ul><li>Human-Robot Interaction in Healthcare </li></ul></ul><ul><ul><li>Virtual Reality-based Locomotion </li></ul></ul>
  5. 5. Previous Positions <ul><li>09/2004-07/2006 </li></ul><ul><li>Research Assistant, Institute of Human Factors and Ergonomics, Tsinghua University </li></ul><ul><ul><li>Product attributes and perceived usability for cellphones [Thesis] </li></ul></ul><ul><ul><li>Website usability evaluation and prototype design with eLong.com </li></ul></ul><ul><ul><li>Cross culture user study with SAP China </li></ul></ul><ul><ul><li>Digital TV user interface evaluation and prototype design with SAMSUNG China </li></ul></ul>
  6. 6. Project – Human-Robot Interaction in Healthcare <ul><li>Critical issues for nursing in healthcare and assisted living facilities: </li></ul><ul><ul><li>Nursing staff shortages in U.S. since 1998 </li></ul></ul><ul><ul><li>Medication errors and patient safety issues result from nurse fatigue or intense work schedule </li></ul></ul><ul><li>Robots may be useful for reducing nurse staffing and workload issues </li></ul><ul><ul><li>Can be used to complement nurses in handling basic patient-related tasks. </li></ul></ul><ul><ul><li>Reduce potentially harmful medication errors. </li></ul></ul><ul><ul><li>Provide continuous care for every patient. </li></ul></ul><ul><li>For future service robots for medicine delivery: </li></ul><ul><ul><li>Direct interaction with patients will be part of the job. </li></ul></ul><ul><ul><li>Task performance and patient emotional responses will be important measures of overall healthcare service. </li></ul></ul>
  7. 7. Project – Human-Robot Interaction in Healthcare Patient <ul><li>Individual </li></ul><ul><li>differences </li></ul><ul><li>Determinants of </li></ul><ul><li>anthropomor- </li></ul><ul><li>phization </li></ul>Service robot <ul><li>Physical appearance </li></ul><ul><li>Interface features </li></ul><ul><li>- Facial expression </li></ul><ul><li>- Voice capability </li></ul><ul><li>- User interaction </li></ul>Interaction Healthcare Service Patient emotional response Measurement Perceived anthropomorphism
  8. 8. Project – Human-Robot Interaction in Healthcare <ul><li>Robot features </li></ul><ul><ul><li>Face </li></ul></ul><ul><ul><ul><li>Abstract </li></ul></ul></ul><ul><ul><ul><li>Human-like </li></ul></ul></ul><ul><ul><li>Voice </li></ul></ul><ul><ul><ul><li>Synthesized voice </li></ul></ul></ul><ul><ul><ul><li>Digitized human voice </li></ul></ul></ul><ul><ul><li>Interactivity </li></ul></ul><ul><ul><ul><li>Visual message </li></ul></ul></ul><ul><ul><ul><li>Touch screen interaction </li></ul></ul></ul>
  9. 9. Project – Human-Robot Interaction in Healthcare <ul><li>Experiment conducted at two senior communities in NC with elderly people </li></ul><ul><ul><li>Simulated medicine delivery task </li></ul></ul><ul><li>Measures </li></ul><ul><ul><li>Heart rate (HR) and galvanic skin response (GSR) </li></ul></ul><ul><ul><ul><li>Converted to emotional measures by fuzzy logic models </li></ul></ul></ul><ul><ul><li>Subjective emotional responses </li></ul></ul><ul><ul><ul><li>Arousal & Valence </li></ul></ul></ul><ul><ul><li>Perceived anthropomorphism (PA) – Perception of robot humanness </li></ul></ul><ul><ul><ul><li>Physical appearance, expressiveness, task handling, subjective experience. </li></ul></ul></ul>
  10. 10. Project – Human-Robot Interaction in Healthcare <ul><li>Results </li></ul><ul><ul><li>Adding anthropomorphic features (i.e., face, voice and interactivity) to service robots leads to perceptions of humanness and positive emotional experiences. </li></ul></ul><ul><ul><li>Within each feature type, perception of humanness and positive emotional responses increase with increasing feature complexity or realism (compared to human). </li></ul></ul><ul><ul><li>Differences in physiological response were found at certain events during interaction. </li></ul></ul><ul><ul><li>Fuzzy inference models have utility in emotion state identification. </li></ul></ul>
  11. 11. Project – eLong.com Usability Test and Redesign <ul><li>Followed user-centered design process </li></ul>
  12. 12. Project – eLong.com Usability Test and Redesign <ul><li>Quantitative method (cluster analysis) of generating typical users </li></ul>
  13. 13. Project – eLong.com Usability Test and Redesign <ul><li>Prototype design (worked with eLong UX team) </li></ul>
  14. 14. Project – eLong.com Usability Test and Redesign <ul><li>Usability test with prototypes </li></ul><ul><ul><li>20 eLong users </li></ul></ul><ul><ul><li>User preferences of </li></ul></ul><ul><ul><ul><li>Homepage layout </li></ul></ul></ul><ul><ul><ul><li>Choosing city on hotel search page, hotel search result display </li></ul></ul></ul><ul><ul><ul><li>Flight search result page </li></ul></ul></ul><ul><ul><ul><li>Hotel wiki page </li></ul></ul></ul><ul><ul><li>Potential usability and user performance caveats </li></ul></ul><ul><ul><li>Future design guidelines </li></ul></ul>
  15. 15. Project – SAMSUNG DTV UI Improvement <ul><li>Feature comparison of DTVs in Chinese market </li></ul><ul><ul><li>Functions: </li></ul></ul><ul><ul><ul><li>Connections, channel set up, screen & picture, timer, audio/video control, energy saving options </li></ul></ul></ul><ul><ul><li>Menu navigation and remote design </li></ul></ul><ul><ul><ul><li>Task time estimation by: </li></ul></ul></ul><ul><ul><ul><li>Hick’s law </li></ul></ul></ul><ul><ul><ul><li>T = a + b log 2 (n+1) </li></ul></ul></ul><ul><ul><ul><li>Keyboard Level Model (KLM) </li></ul></ul></ul>
  16. 16. Project – SAMSUNG DTV UI Improvement <ul><li>Chinese users’ mental model of Digital TV </li></ul><ul><ul><li>No clear ideas in 2004 </li></ul></ul><ul><ul><li>Could be transferred from experiences of PC, game console, web, handheld devices, etc. </li></ul></ul><ul><li>Proposed DTV UI style guidelines </li></ul><ul><ul><li>Maintain the TV context </li></ul></ul><ul><ul><li>Use of colors and fonts from human factors literature </li></ul></ul><ul><ul><li>Localization & Globalization </li></ul></ul>
  17. 17. Project – SAMSUNG DTV UI Improvement <ul><li>Design styles (drawn by students of Art School, Tsinghua University) </li></ul>
  18. 18. Project – SAMSUNG DTV UI Improvement
  19. 19. Project – SAMSUNG DTV UI Improvement <ul><li>Menu structure design </li></ul><ul><ul><li>My favorites </li></ul></ul><ul><ul><li>TV </li></ul></ul>
  20. 20. Project – SAMSUNG DTV UI Improvement <ul><li>Menu structure design </li></ul><ul><ul><li>Media Center </li></ul></ul><ul><ul><li>Interactive Services </li></ul></ul>
  21. 21. Project – SAMSUNG DTV UI Improvement <ul><ul><li>Usability test with webpage-based prototype </li></ul></ul><ul><ul><li>Qualitative interview - perception of DTV product </li></ul></ul><ul><ul><ul><li>No idea of DTV </li></ul></ul></ul><ul><ul><ul><li>“ Media center”, not “media player” </li></ul></ul></ul><ul><ul><ul><li>Online service </li></ul></ul></ul><ul><ul><ul><li>Searching rather than browsing </li></ul></ul></ul><ul><ul><li>Prototype review </li></ul></ul><ul><ul><li>Cognitive walkthrough </li></ul></ul>

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