Wilko Heuten

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Today's smartphones will issue a notification immediately after an event occurs, repeating unanswered notifications in fixed time intervals. The disadvantage of this issue-and-repeat strategy is that notifications can appear in inconvenient situations and thus are perceived as annoying and interrupting. The authors study the mobile context as inferred(More)
Digital maps and route descriptions on a PDA have become very popular for navigation, not the least with the advent of the iPhone and its Google Maps application. A visual support for wayfinding, however, is not reasonable or even possible all the time. A pedestrian must pay attention to traffic on the street, a hiker should concentrate on the narrow trail,(More)
Physical inactivity has become a normal condition for many people today, and in the long run accounts for lout of 10 deaths world-wide. Long sitting periods have been shown to increase the risk of diabetes and cardiovascular disease. In this paper we propose MoveLamp, a system which helps to integrate physical activity into a person's workplace. An ambient(More)
We present PocketMenu, a menu optimized for non-visual, in-pocket interaction with menus on handheld devices with touch screens. By laying out menu items along the border of the touch screen its tactile features guide the interaction. Additional vibro-tactile feedback and speech allows identifying the individual menu items non-visually. In an experiment, we(More)
This paper reports from the first systematic investigation on how to guide people to a destination using the haptic feedback of a mobile phone and its experimental evaluation. The aim was to find a navigation aid that works hands-free, reduces the users’ distraction, and can be realised with widely available handheld devices. To explore the design space we(More)
In this paper, we report about a large-scale in-situ study of tactile feedback for pedestrian navigation systems. Recent advances in smartphone technology have enabled a number of interaction techniques for smartphone that use tactile feedback to deliver navigation information. The aim is to enable eyes-free usage and avoid distracting the user from the(More)
Going on excursions to explore unfamiliar environments by bike is a popular activity in many places in this world. To investigate the nature of exploratory bicycle trips, we studied tourists on their excursions on a famous vacation island. We found that existing navigation systems are either not helpful or discourage exploration. We therefore propose(More)
Networked activity trackers have become an important tool for assessing physical activity, as part of behavior change interventions, within epidemiological studies, or driven by personal interest. However the use of activity trackers is often abandoned after a few months, and their effect on health behavior is unclear. We conducted a longitudinal study(More)
Blind or visually impaired people usually do not leave their homes without any assistance, in order to visit unknown cities or places. One reason for this dilemma is, that it is hardly possible for them to gain a non-visual overview about the new place, its landmarks and geographic entities already at home. Sighted people can use a printed or digital map to(More)