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Pedro Lopes

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Publications by Pedro Lopes (bibliography)

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2012
 
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Mueller, Stefanie, Lopes, Pedro and Baudisch, Patrick (2012): Interactive construction: interactive fabrication of functional mechanical devices. In: Proceedings of the 2012 ACM Symposium on User Interface Software and Technology 2012. pp. 599-606.

Personal fabrication tools, such as laser cutters and 3D printers allow users to create precise objects quickly. However, working through a CAD system removes users from the workpiece. Recent interactive fabrication tools reintroduce this directness, but at the expense of precision. In this paper, we introduce constructable, an interactive drafting table that produces precise physical output in every step. Users interact by drafting directly on the workpiece using a hand-held laser pointer. The system tracks the pointer, beautifies its path, and implements its effect by cutting the workpiece using a fast high-powered laser cutter. Constructable achieves precision through tool-specific constraints, user-defined sketch lines, and by using the laser cutter itself for all visual feedback, rather than using a screen or projection. We demonstrate how constructable allows creating simple but functional devices, including a simple gearbox, that cannot be created with traditional interactive fabrication tools.

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

2011
 
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Lopes, Pedro, Jota, Ricardo and Jorge, Joaquim A. (2011): Augmenting touch interaction through acoustic sensing. In: Proceedings of the 2011 ACM International Conference on Interactive Tabletops and Surfaces 2011. pp. 53-56.

Recognizing how a person actually touches a surface has generated a strong interest within the interactive surfaces community. Although we agree that touch is the main source of information, unless other cues are accounted for, user intention might not be accurately recognized. We propose to expand the expressiveness of touch interfaces by augmenting touch with acoustic sensing. In our vision, users can naturally express different actions by touching the surface with different body parts, such as fingers, knuckles, fingernails, punches, and so forth -- not always distinguishable by touch technologies but recognized by acoustic sensing. Our contribution is the integration of touch and sound to expand the input language of surface interaction.

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

 
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