Konrad Tollmar

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People now have access to many sources of data about their health and wellbeing. Yet, most people cannot wade through all of this data to answer basic questions about their long-term wellbeing: Do I gain weight when I have busy days? Do I walk more when I work in the city? Do I sleep better on nights after I work out? We built the Health Mashups system to(More)
During the last year we have been designing and studying a computer based tool intended to strengthen social group awareness within a research laboratory. While awareness has been a subject of previous research it is still unclear how it should be conceptualized and how it can be provided for a CSCW system. In order to investigate this, and hence to attempt(More)
In this paper, we discuss a study of new media for interpersonal communication. The paper motivates, designs and presents a small evaluation of a technology that is intended to support intimacy at a distance. It first presents an ethnographic study examining family communication and the role of artifacts in supporting emotional closeness, e.g. heirlooms,(More)
Location is a primary cue in many context-aware computing systems, and is often represented as a global coordinate, room number, or a set of Euclidean distances to various landmarks. A user’s concept of location, however, is often defined in terms of regions in which similar activities occur. We discuss the concept of such regions, which we call activity(More)
In this paper, we discuss the possibility of a holistic approach in the design of new media for interpersonal communication. The key argument is that if we base our design on daily practice, this may inhibit truly innovative ideas from taking form, and, on the contrary, if we design using pure intuition and visions, the design is likely to fail due to a(More)
We present Communiplay, a public display media space. People passing by see their own contour mirrored on a public display and can start to play with virtual objects. At the same time, they see others playing at remote displays within the same virtual space. We are interested whether people would use such a public display media space, and if so, how and(More)
We describe an approach to recognizing location from mobile devices using image-based Web search. We demonstrate the usefulness of common image search metrics applied on images captured with a camera-equipped mobile device to find matching images on the World Wide Web or other general-purpose databases. Searching the entire Web can be computationally(More)
Self-logging is a critical component to many wellbeing systems. However, self-logging often is difficult to sustain at regular intervals over many weeks. We demonstrate the power of passive mobile notifications to increase logging of wellbeing data, particularly food intake, in a mobile health service. Adding notifications increased the frequency of logging(More)
Navigating virtual environments usually requires a wired interface, game console, or keyboard. The advent of perceptual interface techniques allows a new option, the passive and untethered sensing of users' pose and gesture to allow them maneuver through virtual worlds. We show new algorithms for passive, real-time articulated tracking with standard cameras(More)