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Auflistung nach Autor:in "Stratmann, Tim Claudius"

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  • Konferenzbeitrag
    Effective Visualization of Time-Critical Notifications in Virtual Reality
    (Mensch und Computer 2018 - Tagungsband, 2018) Gruenefeld, Uwe; Harre, Marie-Christin; Stratmann, Tim Claudius; Lüdtke, Andreas; Heuten, Wilko
    Virtual Reality (VR) devices empower users to be fully immersed into a virtual environment. However, time-critical notifications must be perceived as quickly and correctly as possible. Especially, if they indicate risk of injury (e.g., bumping into walls). Compared to displays used in previous work to investigate fast response times, immersion into a virtual environment, wider field of view and use of near-eye displays observed through lenses may have a considerable impact on the perception of time-critical notifications. Therefore, we studied the effectiveness of different visualization types (color, shape, size, text, number) in two different setups (room-scale, standing-only) with 20 participants in VR. Out study consisted of a part were we tested one notification and a part with multiple notifications showing up at the same time. We measured reaction time, correctness and subjective user evaluation. Our results showed that visualization types can be organized by consistent effectiveness ranking for different numbers of notification elements presented. Further, we offer promising recommendations regarding which visualization type to use in future VR applications for showing time-critical notifications.
  • Konferenzbeitrag
    Supporting the Perception of Spatially Distributed Information on Ship Bridges
    (Mensch und Computer 2019 - Tagungsband, 2019) Stratmann, Tim Claudius; Brauer, Dierk; Boll, Susanne
    Operating modern ships is a challenging task. It requires to interact with large, spatial distributed user interfaces which consist of multiple systems displaying information with varying complexity. Until today, the majority of maritime accidents occur due to human error. A lack of sufficient situation awareness is one of the most frequent reasons for human error. However, using an attention guiding system can support nautical officers to master the information flood and to avoid accidents. For this to work effectively, it has to be evaluated which information has a high demand for attention and therefore should be highlighted. Therefore, we adapted an existing monitoring assistant system to cope with information displays of varying information complexity and used it to rate the situational perception of a nautical officer on the basis of eye tracking data. Based on this we supported nautical officers with a simple attention guidance system during a maneuvering scenario in a ship bridge simulator. In this work, we present our adaptation of the monitoring assistant system, parameters to use it in the maritime scenario ''takeover with traffic encounter'' and the results of a preliminary user study in a ship bridge simulator.