Sascha Gebhardt

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Pie menus are a well-known technique for interacting with 2D environments and so far a large body of research documents their usage and optimizations. Yet, comparatively little research has been done on the usability of pie menus in immersive virtual environments (IVEs). In this paper we reduce this gap by presenting an implementation and evaluation of an(More)
Web services are the backbone of WISDOM system, an information and visualisation system supporting decision makers in the fields of water related management processes based on open source technologies. They enable the distributed and loosely coupled, component based architecture of the system. In cooperating OGC compliant web services for data access,(More)
Virtual Reality (VR) has been an active field of research for several decades, with 3D interaction and 3D User Interfaces (UIs) as important sub-disciplines. However, the development of 3D interaction techniques and in particular combining several of them to construct complex and usable 3D UIs remains challenging, especially in a VR context. In addition,(More)
– Standardised web services are the backbone of the ELVIS system, the EnvironmentaL Visualisation and Information System supporting Vietnamese stake holders in the fields of water related management processes based on open source technologies. They support distributed and loosely coupled, component based architecture of the system. In cooperating OGC(More)
The increasing amount of information available on the internet has raised a lot of challenges in terms of organization of knowledge. In the domain of music indexing, the multimedia research has produced valuable techniques to sort content and compute similarity measures based on different criteria from low-level features like acoustic properties to(More)
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