Auflistung nach Autor:in "Rau, Linda"
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- WorkshopbeitragBridging Realities: Bidirectional Transitions from and to Augmented and Virtual Reality(GI VR / AR Workshop, 2023) Rau, Linda; Horst, Robin; Feller, Manuel; Dörner, Ralf
- longDesign Patterns and Author Roles for Pattern-Based Educational Virtual Reality Experiences(GI VR / AR Workshop, 2021) Horst, Robin; Naraghi-Taghi-Off, Ramtin; Rau, Linda; Dörner, Ralf
- TextdokumentIntegration of Game Engine Based Mobile Augmented Reality Into a Learning Management System for Online Continuing Medical Education(INFORMATIK 2020, 2021) Horst, Robin; Fenchel, Dennis; Retz, Reimond; Rau, Linda; Retz, Wilhelm; Dörner, RalfPhysicians must participate in continuing medical education (CME) as part of the medical quality assurance. One possibility is to take online courses in their private living environment. These courses are mostly text-or video-based. Novel technologies such as mobile Augmented (AR) or mobile Virtual Reality (VR) are not yet established although their usage is not out of bounds in private homes anymore. Game engines can facilitate the authoring of applications that utilize VR/AR, as they provide many crucial functionalities out of the box. However, integrating the resulting VR/AR software in online CME courses is not trivial. In this paper, we investigate this integration into an existing learning management system (LMS) for online CME. In the example of a mobile AR application, we propose a system design that extends a course by a mobile AR part. We describe our implementation and how we transition users from their familiar web-interface on the desktop PC to a mobile AR application.
- longInterface Techniques for Tangible Augmented Reality in a Mobile Device Setup for Magic Lens Experiences(GI VR / AR Workshop, 2020) Döring, Dagny C.; Horst, Robin; Rau, Linda; Dörner, Ralf
- TextdokumentPresenters in Virtual Reality in Slideshow Presentations(INFORMATIK 2020, 2021) Horst, Robin; Rau, Linda; Dieter, Lars; Feller, Manuel; Gaida, Jonas; Leipe, Andreas; Eversheim, Julian; Wirth, Julia; Bachmeier, Jörn; Müller, Julius; Melcher, Maik; Dörner, RalfSlideshow presentations have become ubiquitous in our everyday life, and are used for communicating information of different kinds. In this paper, we consider two different concepts that include both slides and VR technology in one presentation, mixed presentations, and virtual presentations, and examine the role of the presenter in these concepts. We conducted three user studies which indicate that it is not necessary that presentations need to be held completely in VR as both virtual and mixed presentations were accepted by our participants, and that our participants preferred immersed presenter integrations.
- ZeitschriftenartikelThe Shared View Paradigm in Asymmetric Virtual Reality Setups(i-com: Vol. 19, No. 2, 2020) Horst, Robin; Klonowski, Fabio; Rau, Linda; Dörner, RalfAsymmetric Virtual Reality (VR) applications are a substantial subclass of multi-user VR that offers not all participants the same interaction possibilities with the virtual scene. While one user might be immersed using a VR head-mounted display (HMD), another user might experience the VR through a common desktop PC. In an educational scenario, for example, learners can use immersive VR technology to inform themselves at different exhibits within a virtual scene. Educators can use a desktop PC setup for following and guiding learners through virtual exhibits and still being able to pay attention to safety aspects in the real world (e. g., avoid learners bumping against a wall). In such scenarios, educators must ensure that learners have explored the entire scene and have been informed about all virtual exhibits in it. According visualization techniques can support educators and facilitate conducting such VR-enhanced lessons. One common technique is to render the view of the learners on the 2D screen available to the educators. We refer to this solution as the shared view paradigm. However, this straightforward visualization involves challenges. For example, educators have no control over the scene and the collaboration of the learning scenario can be tedious. In this paper, we differentiate between two classes of visualizations that can help educators in asymmetric VR setups. First, we investigate five techniques that visualize the view direction or field of view of users (view visualizations) within virtual environments. Second, we propose three techniques that can support educators to understand what parts of the scene learners already have explored (exploration visualization). In a user study, we show that our participants preferred a volume-based rendering and a view-in-view overlay solution for view visualizations. Furthermore, we show that our participants tended to use combinations of different view visualizations.
- TextdokumentA Tangible Object for General Purposes in Mobile Augmented Reality Applications(INFORMATIK 2020, 2021) Rau, Linda; Horst, Robin; Liu, Yu; Dörner, Ralf; Spierling, UlrikeSmartphones and tablets are common technologies within today's private living environments. They are well-suited to serve as a platform for mobile Augmented Reality (AR). Tangible AR is a subclass of AR which includes tangible objects and can make interactions intuitive. With this, new options for human-computer interaction become available at home. Based on literature research and design rationale, we identify requirements that help to develop a tangible object which can intuitively be used as tangible user interface (TUI) for mobile AR applications. Users should be able to handle the tangible object comfortably. Additionally, it needs to be reliably trackable with today's tracking algorithms. The tangible object should also offer affordances to the users. We strive to develop a single, versatile object that is usable in different application scenarios at home. Our approach is to design a tangible object that combines different surfaces and shapes to offer various affordances and interaction possibilities. A physical instance of this object can be created with a 3D printer. We argue that this allows users to trigger actions intuitively in an AR environment or to manipulate virtual content.