Demo 1 Silverlight Game Demo 2 Multi-touch Image Navigation Demo 3 Collaborative Drawing Demo 4 3D Image Browsing		Demo 4 3D Image Browsing In-The-Air User Interface allows users to work in a 3D space, which is a more intuitive way to navigate 3D images. Compared to the traditional UIs, for example keyboard-mouse and multi-touch screen, our UI is no longer limited by the 2D environment.