Matthias Korn

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We investigate in which forms field trials are a workable model as part of an exploratory design process for sporadic, mobile, non-work settings. A major concern of evaluating ubicomp systems is to study how practices and context of use emerge and develop over time when new technology is introduced. To introduce a sophisticated version of our own prototype(More)
Civic engagement systems to date frequently focus on purely rational aspects of deliberation void of emotions. In order to empower youth in a largely immigrant and lower-income neighborhood, we designed a location-based storytelling and story experiencing system for web-enabled mobile phones. The system is based on a novel concept of pervasive play where(More)
Many open questions on how to best observe the mobile user experience remain – at the stage of design time as well as use time. In this paper, we are focusing on the stage of design time and describe our experiences from evaluating a mobile application for citizen involvement in municipal land use planning. Due to the problems and issues identified after(More)
We present a technique for enabling WiFi proximity detection in mobile web applications based on proximity-adaptive HTTP responses (PAHR). The technique requires zero installation on the client and is client platform independent. Our reference implementation ProxiMagic is low-cost and provides robust and responsive interactivity based on proximity(More)
We present a novel electric-field and voltage sensor based on the electro-optical properties of polymer-dispersed liquid-crystals (PDLCs). In principle, the transmittance of PDLCs is a nonlinear function of the applied electrical field. To measure an AC field we superposed to it a known DC field. This allowed us to achieve linearization of the PDLC response(More)
This paper reports on an exploratory participatory design process aimed at supporting citizen deliberation in municipal planning. It presents the main outcomes of this process in terms of selected prototypes and an approach to the use setting. We support and discuss different ways for citizens to act and reflect on proposed plans: in-situ, while physically(More)
The present study proposes a catheter system with an expandable coil etched on a polyimide foil. The catheter system combines the advantages of a small insertion diameter when the coil is rolled up in a protective carrier sheath with an increased signal-to-noise ratio (SNR) and penetration depth when the coil is pushed out. After imaging, the coil can be(More)
We report on the results of a diary study of the everyday volunteering and help giving of individuals in the millennial generation. We describe the breadth of work structures implicated in volunteering, the social structures implicated in volunteering, and the interdependencies between the two. We analyze the roles that technology plays in volunteering with(More)
Adding virtual objects to real environments plays an important role in todays computer graphics: Typical examples are virtual furniture in a real room and virtual characters in real movies. For a believable appearance, consistent lighting of the virtual objects is required. We present an augmented reality system that displays virtual objects with consistent(More)