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(a) (b) (c) (d) Figure 1: We conducted a user study to evaluate the usability of handheld AR applications for the elderly (a,b). Since the results show that elderly users have difficulties holding up a tablet computer over a long period of time, we tested whether using head-mounted displays is an alternative for them (c). We also propose improved AR user(More)
The availability of contextually relevant information is often safety-critical while practicing extreme outdoor sports. Off-piste skiing is not an exception. This activity requires group communication and information sharing before, during, and after each descent. We are reporting on the results of an exploratory research study that we conducted with an(More)
Today, a wide variety of technologies and devices are available for skiers. Those gadgets perform a number of tasks to improve the overall skiing experience, such as collecting personal performance data, recording memorable moments, or assisting in communication with group members. In this position paper we outline our empirical findings from unstructured(More)
Winter sports like skiing and snowboarding are often group activities. Groups of skiers and snowboarders traditionally use folded paper maps or board-mounted larger-scale maps near ski lifts to aid decision making: which slope to take next, where to have lunch, or what hazards to avoid when going off-piste. To enrich those static maps with personal content(More)
Interactive tabletops or projections became widely utilized in schools, museum exhibitions or conference rooms to teach and illustrate dynamic artifacts or support talks. In such scenarios, all observers, such as pupils and teachers, will perceive the same information even if they hold different positions and could benefit from an adapted and personalized(More)
Online social networks have made the sharing of personal experiences with others -- mostly in form of photos and comments -- a common activity. At the same time, an ever increasing number of dedicated sport tracking apps on our smartphones allow us to record statistical and biometric parameters from our workouts and, subsequently, share them with family,(More)
The growing popularity of winter sports, as well as the trend towards high speed carving skies, have increased the risk of accidents on today's ski slopes. While many skiers now wear ski helmets, their bulk might in turn lower a skier's ability to sense their surroundings, potentially leading to dangerous situations. In this demo paper, we describe our(More)
Today's mobile app economy has greatly expanded the types of "things" people can share --- spanning from new types of digital content like physiological data (e.g., workouts) to physical things like apartments and work tools ("sharing economy"). To understand whether mobile platforms provide adequate support for such novel sharing services, we surveyed 200(More)