From NASA guest speaker, "Use of hand pose for kinesthetic compensation..." 11am Mon July 30th

[Anthony...@csiro.au]

Dear EMBS QLD Members,

 

We have a distinguished visitor to QCAT on Monday 30th July from NASA Ames - Dr Stephen Ellis:

 

When: 11am Monday 30 July 2012

Where: QCAT Lecture Theatre, 1 Technology Court, Pulenvale

 

Title: Use of hand pose for kinesthetic compensation of rotational sensorimotor rearrangements in the horizontal plane (and beyond!)

 

Speaker: Stephen R. Ellis   from NASA Ames Research Center, Moffett Field CA

 

Reporting on joint work by Stephen R. Ellis and Bernard D. Adelstein

Abstract

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A new sensorimotor phenomenon is reported in which subjects use hand-sensed kinesthetic information to compensate for rotational sensorimotor rearrangements.  This compensation benefits from conscious awareness, is related to hand posture and may provide practical assistance during teleoperation.  The technique can reduce control inefficiency with some mis-alignments by as much as 64%.  The results support Guiard’s suggestion that in bi-manual tasks one hand provides an operational frame-of-reference for the other hand as in a closed kinematic chain.  Our results with right-handed subjects show that the right and left hands are equally effective at providing such a cue. A constant-angular-targeting-error model, similar to the equiaxial spiral model used by Cunningham and Vardi (hand movements)  and by Rushton and colleagues (walking), is used to model the trajectories of the targeting hand movements. It can also provide a natural measure of the phenomenon with a model parameter. Recent generalization of the study to three dimensional movements show that the equiaxial spiral model can work for rotations of less than ~65°, but that deeper analysis will be needed to explain the effects of larger rotations. The more general recent experimentation also reveals some interesting spatial anisotropies that probably reflect the way three dimensional movements are internally represented.

 

Brief Bio

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Stephen R. Ellis has headed the Advanced Displays and Spatial Perception Laboratory at the NASA Ames Research Center. He received an A.B. in Behavioral Science from U.C. Berkeley (1969), a Ph.D. in Psychology (1974) from McGill University and has had postdoctoral fellowships in Physiological optics and Bioengineering at Brown University and at U.C. Berkeley respectively. He has published over 190 journal publications and reports on user interaction with spatial information and has been in the forefront of the introduction of perspective and 3D formats into user interfaces for aerospace applications. More recently he has pursued the study of virtual environments as user interfaces and as scientific instruments. He has served on the editorial boards of Presence, Virtual Reality and Human Factors and has edited a book, Pictorial communication in virtual and real environments, (Taylor and Francis, London, 2nd Ed. 1993).

 

Hope you to see there!

 

 

Regards

Anthony

 

Anthony Nguyen, PhD
Research Team Leader | The Australian e-Health Research Centre, ICT Centre
Project Leader | Clinical Information Processing and Reporting
CSIRO

Phone: +61 7 3253 3637 | Fax: +61 7 3253 3690 | Mobile: 0433 119 805
Anthony...@csiro.au | www.csiro.au | www.aehrc.com/cipar
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