Simon Hoermann

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We present a novel interface approach which combines 2D video-based AR with a partial voxel model, allowing for more convincing interactions with 3D objects and worlds. It enables users in a hand-controlled interface (a) to interact with a virtual environment (VE) and at the same time (b) allows for correct mutual occlusions between interacting fingers and(More)
Mixed reality rehabilitation systems and games are demonstrating potential as innovative adjunctive therapies for health professionals in their treatment of various hand and upper limb motor impairments. Unilateral motor deficits of the arm, for example, are commonly experienced post stroke. Our TheraMem system provides an augmented reality game environment(More)
Augmented Reality (AR) has the potential to change the way therapy and rehabilitation is understood and administered. It can be used to manipulate the experience of reality resulting in novel rehabilitative applications including but not limited to augmented mirror box manipulations. We present a conceptual framework for the effective use of AR in a(More)
Mixed reality rehabilitation systems and games are demonstrating potential as innovative adjunctive therapies for health professionals in their treatment of various hand and upper limb motor impairments. Unilateral motor deficits of the arm, for example, are commonly experienced poststroke. Our Augmented Reflection Technology (ART) system provides an(More)
Humans readily perceive ownership of a limb even when it is artificially induced as in the case of using a mirror reflection. However, mirror reflections are very constrained perceptions which do not allow transformations and varied contexts as often occurs in real life. The extent to which perceived limb ownership occurs with video-mediated manipulations(More)
We investigate the effect that visual occlusion plays on users' perception in a prototypical augmented reality post-stroke therapy system. We implemented a reach-based therapeutic exercise using the Microsoft Kinect to enable depth sensing and correct visual occlusion of the upper-limb. Thirty participants evaluated the exercise with three different visual(More)
Chat systems are promising ways to engage young people and to support them in overcoming barriers in help-seeking behaviour. Current mental health chat services are mostly focused on crisis support and suicide prevention. In contrast this study is on a chat system for early help-seekers rather than acutely distressed individuals, and where these(More)
BACKGROUND Synchronous written conversations (or "chats") are becoming increasingly popular as Web-based mental health interventions. Therefore, it is of utmost importance to evaluate and summarize the quality of these interventions. OBJECTIVE The aim of this study was to review the current evidence for the feasibility and effectiveness of online(More)