Ubiquitous Graphics addresses the problem of interacting with very large computer graphics images, for instance an online map or a large digitized painting. It uses a combination of mobile and stationary displays to show both overview and detail. The main image is displayed using a projector or other large traditional display. To access details, the user holds a mobile device in front of the stationary display. Using ultrasonic tracking the smaller display is aligned with the overview, giving access to a corresponding portion of the image in higher resolution. Alternatively the system provides "magic lens" functionality that can show additional information. Users may add free-form annotations and pre-defined graphical objects by interacting directly with the mobile device. In a user study, subjects drew better descriptive maps using the system than an ordinary map application. The system is robust and was demonstrated to several thousand people in a week-long public exhibit.

The GapiDraw platform supports the creation of high-performance graphical applications across a variety of handheld hardware configurations, including Palm, Symbian and Windows Mobile devices. Handheld computers makes it possible to create applications and services not possible with stationary computers, thus there is a need for a high performance development platform for rapid prototyping on mobile devices. Unlike desktop computers there has not yet evolved a single standard for graphics on handheld devices. Typically, handheld computers only provide direct frame buffer access, and there are major differences in implementation details across different hardware configurations, making it difficult to use mobile devices for prototyping. Using GapiDraw, developers can re-use the same code across a variety of devices and do not have to focus on device-specific implementation details. GapiDraw is actively used as an enabler platform in numerous research labs, and has also been used in over one hundred commercial games. We give an overview of the platform, and highlight some new mobile application concepts made possible through the use of GapiDraw.

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The paper presents results of a research project that has aimed at developing a knowledge management architecture for mobile work domains. The architecture developed, called FieldWise, was based on fieldwork in two organisations and feedback from users of prototype systems. This paper describes the empirically grounded requirements of FieldWise, how these have been realised in the architecture, and how the architecture has been implemented in the news journalism domain. FieldWise adds to the field of CSCW by offering an empirically grounded architecture with a set of novel features that have not been previously reported in the literature.