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The desensitization resulting from application of 10 or 100 ppm capsaicin was investigated, using daily testing of a capsaicin series (1-1000 ppm, in log steps). The series showed a significant decrement in perceived burn following desensitization with either concentration. Perceived burn of 100 and 1000 ppm did not recover from 100 ppm desensitization in(More)
We present DRAGON, a direct manipulation interaction technique for frame-accurate navigation in video scenes. This technique benefits tasks such as professional and amateur video editing, review of sports footage, and forensic analysis of video scenes. By directly dragging objects in the scene along their movement trajectory, DRAGON enables users to quickly(More)
Modern presentation software is still built around interaction metaphors adapted from traditional slide projectors. We provide an analysis of the problems in this application genre that presentation authors face and present Fly, a presentation tool that is based on the idea of planar information structures. Inspired by the natural human thought processes of(More)
We introduce MudPad, a system capable of localized active haptic feedback on multitouch screens. We use an array of electromagnets combined with an overlay containing magnetorheological (MR) fluid to actuate a tablet-sized area. As MudPad has a very low reaction time it is able to produce instant multi-point feedback for multitouch input, ranging from(More)
In this work we present a hardware prototype that uses bending gestures as input for a mobile device and experimental setups that compare possible gestures with other, more traditional input methods in mobile computing. These will eventually result in guidelines for researchers and designers how to build bendable devices and show new interaction metaphors(More)
In this paper, we present Fly, a prototype presentation system that adds a visual structure to presentations. Current presentation software, like PowerPoint, structure slides in a linear sequence. The Fly design introduces a spatial organization that is based on Mind Maps. Using colour associations, spatial relations, and fluid movement, we show how(More)
We present Stacksplorer, a new tool to support source code navigation and comprehension. Stacksplorer computes the call graph of a given piece of code, visualizes relevant parts of it, and allows developers to interactively traverse it. This augments the traditional code editor by offering an additional layer of navigation. Stacksplorer is particularly(More)
Understanding source code is crucial for successful software maintenance, and navigating the call graph is especially helpful to understand source code [12]. We compared maintenance performance across four different development environments: an IDE without any call graph exploration tool, a Call Hierarchy tool as found in Eclipse, and the tools Stacksplorer(More)
Most presentation software uses the slide deck metaphor to create visual presentation support. Recently, canvas presentation tools such as Fly or Prezi have begun to use a zoomable free-form canvas to arrange information instead. While their effect on authoring presentations has been evaluated previously, we studied how they impact the audience. In a(More)
The phase vocoder has become a popular method for time-stretching audio (altering its play rate without changing its pitch) in recent years. Despite continuing improvements to the algorithm itself for enhanced audio quality , the latency introduced by the processing is less well-understood. Such an understanding is crucial for accurate synchronization in(More)