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Julian Lepinski


Publications by Julian Lepinski (bibliography)

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Ng, Albert, Lepinski, Julian, Wigdor, Daniel, Sanders, Steven and Dietz, Paul (2012): Designing for low-latency direct-touch input. In: Proceedings of the 2012 ACM Symposium on User Interface Software and Technology 2012. pp. 453-464. http://dx.doi.org/10.1145/2380116.2380174

Software designed for direct-touch interfaces often utilize a metaphor of direct physical manipulation of pseudo "real-world" objects. However, current touch systems typically take 50-200ms to update the display in response to a physical touch action. Utilizing a high performance touch demonstrator, subjects were able to experience touch latencies ranging from current levels down to about 1ms. Our tests show that users greatly prefer lower latencies, and noticeable improvement continued well below 10ms. This level of performance is difficult to achieve in commercial computing systems using current technologies. As an alternative, we propose a hybrid system that provides low-fidelity visu-al feedback immediately, followed by high-fidelity visuals at standard levels of latency.

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

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Lepinski, Julian, Akaoka, Eric and Vertegaal, Roel (2009): Context menus for the real world: the stick-anywhere computer. In: Proceedings of ACM CHI 2009 Conference on Human Factors in Computing Systems 2009. pp. 3499-3500. http://doi.acm.org/10.1145/1520340.1520511

In this video, we present a context-aware menu system made out of simulated digital paper. Built on the ubiquitous yellow sticky notes found in offices everywhere, our computer provides a contextual interactive paper menu that can be used to operate numerous everyday electric and electronic devices, such as lamps, speakers and computers. Stuck on a device, the sticky screen displays contextual information and control options which may be selected with a single touch of the finger. The stick-anywhere computer is an example of a context-aware organic user interface that, through a flexible paper-like display, allows software to reside directly on the product or task. The Stick-Anywhere Computer was implemented using a Xuuk Eyebox2 IR camera that tracks nearly invisible IR markers on post-it notes as well as fingers, and uses a projector to render interactive content directly onto the paper note.

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

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