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Hsu-Sheng Ko

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Publications by Hsu-Sheng Ko (bibliography)

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2011
 
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Bragdon, Andrew and Ko, Hsu-Sheng (2011): Gesture select:: acquiring remote targets on large displays without pointing. In: Proceedings of ACM CHI 2011 Conference on Human Factors in Computing Systems 2011. pp. 187-196.

When working at a large wall display, even if partially utilized, many targets are likely to be distant from the user, requiring walking, which is slow, and interrupts workflow. We propose a novel technique for selecting remote targets called Gesture Select, in which users draw an initial mark, in a target's direction; rectilinear gestures represented as icons are dynamically overlaid on targets within a region of interest; the user then continues by drawing the continuation mark corresponding to the target, to select it. Extensions to this technique to support working with remote content for an extended period, and learning gesture shortcuts are presented. A formal experiment indicates Gesture Select significantly outperformed direct selection for mid/far targets. Further analysis suggests Gesture Select performance is principally affected by the extent to which users can read the gestures, influenced by distance and perspective warping, and the gesture complexity in the ROI. The results of a second 2-D experiment with labeled targets indicate Gesture Select significantly outperformed direct selection and an existing technique.

© All rights reserved Bragdon and Ko and/or their publisher

2010
 
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Zeleznik, Robert, Bragdon, Andrew, Adeputra, Ferdi and Ko, Hsu-Sheng (2010): Hands-on math: a page-based multi-touch and pen desktop for technical work and problem solving. In: Proceedings of the 2010 ACM Symposium on User Interface Software and Technology 2010. pp. 17-26.

Students, scientists and engineers have to choose between the flexible, free-form input of pencil and paper and the computational power of Computer Algebra Systems (CAS) when solving mathematical problems. Hands-On Math is a multi-touch and pen-based system which attempts to unify these approaches by providing virtual paper that is enhanced to recognize mathematical notations as a means of providing in situ access to CAS functionality. Pages can be created and organized on a large pannable desktop, and mathematical expressions can be computed, graphed and manipulated using a set of uni- and bi-manual interactions which facilitate rapid exploration by eliminating tedious and error prone transcription tasks. Analysis of a qualitative pilot evaluation indicates the potential of our approach and highlights usability issues with the novel techniques used.

© All rights reserved Zeleznik et al. and/or their publisher

 
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Changes to this page (author)

05 Jul 2011: Modified
03 Nov 2010: Added

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URL: http://www.interaction-design.org/references/authors/hsu-sheng_ko.html
Jul 24

There is no reason for any individual to have a computer in his home

-- Ken Olson

 
 

Featured chapter

Marc Hassenzahl explains the fascinating concept of User Experience and Experience Design. Commentaries by Don Norman, Eric Reiss, Mark Blythe, and Whitney Hess

User Experience and Experience Design !

 
 

Our Latest Books

Kumar and Herger 2013: Gamification at Work: Designing Engaging Business Software...
by Janaki Mythily Kumar and Mario Herger

 
Start reading

Whitworth and Ahmad 2013: The Social Design of Technical Systems: Building technologies for communities...
by Brian Whitworth and Adnan Ahmad

 
Start reading

Soegaard and Dam 2013: The Encyclopedia of Human-Computer Interaction, 2nd Ed....
by Mads Soegaard and Rikke Friis Dam

 
Start reading
 
 

Help us help you!