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Recent advanced interface technologies allow the user to interact with different spaces such as Virtual Reality (VR), Augmented Reality (AR) and Ubiquitous Computing (UC) spaces. Previously, human computer interaction (HCI) issues in VR, AR and UC have been largely carried out in separate communities. Here, we combine these three interaction spaces into a single interaction space, called Tangible Space. We propose the VARU framework which is designed for rapid prototyping of a tangible space application. It is designed to provide extensibility, flexibility and scalability. Depending on the available resources, the user could interact with either the virtual, physical or mixed environment. By having the VR, AR and UC spaces in a single platform, it gives us the possibility to explore different types of collaboration across the different spaces. As a result, we present our prototype application which is built using the VARU framework.

This paper presents a content structure for building mobile augmented reality (AR) applications in HTML5 to achieve a clean separation of the mobile AR content and the application logic for scaling as on the Web. We propose that the content structure contains the physical world as well as virtual assets for mobile AR applications as document object model (DOM) elements and that their behaviour and user interactions are controlled through DOM events by representing objects and places with a uniform resource identifier. Our content structure enables mobile AR applications to be seamlessly developed as normal HTML documents under the current Web eco-system.

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