The research focus of the Human-Computer Interaction Group is on the design, implementation and evaluation of user interfaces for various interactive devices. The devices are ranging from mobile devices (mobile phones. PDAs, Table PCs) over conventional PCs up to wall-sized screens (e.g. Powerwall). Typical application domains are Digital Libraries, e-Commerce Websites, Visual Information Seeking System, or map based services. The new interaction concepts are based on a new user interface paradigm called Zoomable Object-Oriented Information Landscape. Further research and teaching activities are in the fields of Usability Engineering (e.g. visual requirement specification) and Information Visualization (e.g. visual analytics). > Our research projects.