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This paper describes an authoring language for specifying communicative behavior and interaction of agents in virtual worlds. We focus on the popular three-dimensional (3D) multi-user online world "Second Life" and the emerging "OpenSimulator" project. While tools for designing avatars and in-world objects exist, technology to support content creators in(More)
The technologies and functions of social media have significantly changed interaction on the Internet. These changes affect the perceived attractiveness of websites. Prior research regarding classic Internet offers has only partly considered these specifics. The determinants of attractive social media websites and corresponding online instruments remain(More)
This paper describes an approach how to integrate virtual agents into the 3D multiuser online world Second Life. For this purpose we have implemented a new client software for Second Life that controls virtual agents (" bots ") and makes use of the Multimodal Presentation Markup Language 3D (MPML3D) to define their behavior. The technical merits and(More)
Palpation is a physical examination technique where objects, e.g., organs or body parts, are touched with fingers to determine their size, shape, consistency and location. Many medical procedures utilize palpation as a supplementary interaction technique and it can be therefore considered as an essential basic method. However, palpation is mostly neglected(More)
The grasping of virtual objects has been an active research field for several years. Solutions providing realistic grasping rely on special hardware or require time-consuming parameterizations. Therefore, we introduce a flexible grasping algorithm enabling grasping without computational complex physics. Objects can be grasped and manipulated with multiple(More)
The analyses of previously generated Podospora anserina strains in which the mitochondrial superoxide dismutase, PaSOD3, is increased in abundance, revealed unexpected results, which, at first glance, are contradictory to the 'free radical theory of aging' (FRTA). To re-analyze these results, we performed additional experiments and developed a mathematical(More)
This paper introduces approaches towards the development of intuitive input devices built with optical sensors from mice. The two main ideas are spatial reconfiguration of the sensor and advanced interpretation of the sensor data. We present new concepts for various input devices that are easy to rebuild. A prototype for kinematics manipulation of virtual(More)
The aim of this paper is two-fold. First, it describes a scripting language for specifying communicative behavior and interaction of computer-controlled agents ("bots") in the popular three-dimensional (3D) multiuser online world of "Second Life" and the emerging "OpenSimulator" project. While tools for designing avatars and in-world objects in Second Life(More)
PURPOSE The main purpose is to provide an intuitive VR-based training environment for regional anesthesia (RA). The research question is how to process subject-specific datasets, organize them in a meaningful way and how to perform the simulation for peripheral regions. METHODS We propose a flexible virtual patient architecture and methods to process(More)