Joe Mullenbach

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We present a new surface haptic interface that combines a variable friction device (the Large Area TPaD) with an impedance controlled planar mechanism. This device configuration is novel because it allows control of the frictional force in the static friction regime, control of the direction of force in the kinetic friction regime, as well as a degree of(More)
This paper explores the use of variable friction surface haptics enabled by the TPad Tablet to support affective communication between pairs of users. We introduce three haptic applications for the TPad Tablet (text messaging, image sharing, and virtual touch) and evaluate the applications with 24 users, including intimate couples and strangers.(More)
With the ubiquity of wearable computing, an important and emerging challenge is to understand how to design wearable information displays for non-visual, non-auditory interaction. This is particularly relevant to the design of accessible technologies for people with vision impairments. Working towards this aim, we developed a smartwatch prototype that uses(More)
A TPad Tablet is a tablet computer with a variable friction touchscreen. It can create the perception of force, shape, and texture on a fingertip, enabling unique and novel haptic interactions on a flat touchscreen surface. We have created an affordable and easy to use variable friction device and have made it available through the open-hardware TPad Tablet(More)
The TPad Tablet combines an Android tablet with a variable friction haptic touch-screen and offers many novel interaction possibilities. For example, unique textures may be associated with different user interface elements, such as text boxes and buttons. This paper presents an Android AccessibilityService that was created to give operating system-wide (OS)(More)
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