Publication statistics

Pub. period:1996-2005
Pub. count:9
Number of co-authors:5


Number of publications with 3 favourite co-authors:

Hauro Oba:
Michimune Kohno:
Satoshi Matsuoka:



Productive colleagues

Yuji Ayatsuka's 3 most productive colleagues in number of publications:

Jun Rekimoto:60
Satoshi Matsuoka:14
Michimune Kohno:8

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Yuji Ayatsuka


Publications by Yuji Ayatsuka (bibliography)

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Ayatsuka, Yuji and Rekimoto, Jun (2005): tranSticks: physically manipulatable virtual connections. In: Proceedings of ACM CHI 2005 Conference on Human Factors in Computing Systems 2005. pp. 251-260.

A virtually connected medium called tranStick is described that functions both as a "virtual wire" and as a "memory card" containing a shared space. A user can connect two networked devices by simply placing one of a pair of tranSticks with the same identifier into each device. The tranSticks provide feedback indicating that the devices are connected; the connection to be closed or changed in the same way it would be if the devices were connected by a physical cable. A user can also access to a shared space on a network as if the space were in the tranStick. Since tranSticks contain long secret keys, the process of finding another tranStick with the same identifier can be encrypted. The tranStick approach differs from other approaches in that it provides feedback from the connection as well as serving as a medium for establishing a connection, and it enables disconnection and switchover to be done intuitively because the operations are reversible.

© All rights reserved Ayatsuka and Rekimoto and/or ACM Press

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Ayatsuka, Yuji, Kohno, Michimune and Rekimoto, Jun (2004): Real-World Oriented Access Control Method with a Displayed Password. In: Masoodian, Masood, Jones, Steve and Rogers, Bill (eds.) Computer Human Interaction 6th Asia Pacific Conference - APCHI 2004 June 29 - July 2, 2004, Rotorua, New Zealand. pp. 19-29.

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Rekimoto, Jun, Ayatsuka, Yuji, Kohno, Michimune and Oba, Hauro (2003): Proximal Interactions: A Direct Manipulation technique for wireless networking. In: Proceedings of IFIP INTERACT03: Human-Computer Interaction 2003, Zurich, Switzerland. p. 511.

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Rekimoto, Jun, Ayatsuka, Yuji and Kohno, Michimune (2003): SyncTap: An Interaction Technique for Mobile Networking. In: Chittaro, Luca (ed.) Human-Computer Interaction with Mobile Devices and Services - 5th International Symposium - Mobile HCI 2003 September 8-11, 2003, Udine, Italy. pp. 104-115.

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Matsushita, Nobuyuki, Ayatsuka, Yuji and Rekimoto, Jun (2000): Dual Touch: A Two-Handed Interface for Pen-Based PDAs. In: Ackerman, Mark S. and Edwards, Keith (eds.) Proceedings of the 13th annual ACM symposium on User interface software and technology November 06 - 08, 2000, San Diego, California, United States. pp. 211-212.

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Rekimoto, Jun and Ayatsuka, Yuji (2000): CyberCode: designing augmented reality environments with visual tags. In: Designing Augmented Reality Environments 2000 2000. pp. 1-10.

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Ayatsuka, Yuji, Rekimoto, Jun and Matsuoka, Satoshi (1998): Popup Vernier: A Tool for Sub-Pixel-Pitch Dragging with Smooth Mode Transition. In: Mynatt, Elizabeth D. and Jacob, Robert J. K. (eds.) Proceedings of the 11th annual ACM symposium on User interface software and technology November 01 - 04, 1998, San Francisco, California, United States. pp. 39-48.

Dragging is one of the most useful and popular techniques in direct manipulation graphical user interfaces. However, dragging has inherent restrictions caused by pixel resolution of a display. Although in some situations the restriction could be negligible, certain kinds of applications, e.g., real world applications where the range of adjustable parameters vastly exceed the screen resolution, require sub-pixel-pitch dragging. We propose a sub-pixel-pitch dragging tool, popup vernier, plus a methodology to transfer smoothly into 'vernier mode' during dragging. A popup vernier consists of locally zoomed grids and vernier scales displayed around them. Verniers provide intuitive manipulation and feedback of fine grain dragging, in that pixel-pitch movements of the grids represent sub-pixel-pitch movements of a dragged object, and the vernier scales show the object's position at a sub-pixel accuracy. The effectiveness of our technique is verified with a proposed evaluation measure that captures the smoothness of transition from standard mode to vernier mode, based on the Fitts' law.

© All rights reserved Ayatsuka et al. and/or ACM Press

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Ayatsuka, Yuji, Matsuoka, Satoshi and Rekimoto, Jun (1998): Layered Penumbrae: An Effective 3D Feedback Technique. In: Third Asian Pacific Computer and Human Interaction July 15-17, 1998, Kangawa, Japan. pp. 202-209.

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Ayatsuka, Yuji, Matsuoka, Satoshi and Rekimoto, Jun (1996): Penumbrae for 3D Interactions. In: Kurlander, David, Brown, Marc and Rao, Ramana (eds.) Proceedings of the 9th annual ACM symposium on User interface software and technology November 06 - 08, 1996, Seattle, Washington, United States. pp. 165-166.

We propose a new feedback technique for 3D interaction using penumbrae which the objects cast. Rather than generating a real penumbra, which is computationally expensive, a fast, simplified algorithm is employed, which also is better suited for position feedback purposes. User studies show that 1) compared to orthographic shadow projections, 3D spatial recognition and placement tasks are substantially faster with our penumbrae, and 2) the users feel the feedback to be more natural.

© All rights reserved Ayatsuka et al. and/or ACM Press

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