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Recent developments in digital pen and paper solutions enable, not only the digital capture of handwriting, but also paper to be used as an interactive medium that links to digital information and services. We present a tool that builds on technologies for interactive paper to enable PowerPoint presentations to be controlled from printed slide handouts.(More)
Research in collaborative editing tends to have been undertaken in isolation rather than as part of a general information or application infrastructure. Our goal is to develop a universal information platform that can support collaboration in a range of application domains. Since not all user groups have the same conventions and not all tasks have the same(More)
Citations form the basis for a web of scientific publications. Search engines, embedded hyperlinks and digital libraries all simplify the task of finding publications of interest on the web and navigating to cited publications or web sites. However the actual reading of publications often takes place on paper and frequently on the move. We present a system(More)
We propose a new approach to collaborative filtering in mobile tourist information systems based on spatio-temporal proximity in social contexts. Users store ratings and reviews of locations and events locally within their personal information system and then exchange these with other users present in the same social contexts using ad-hoc networking and(More)
Despite the increasing availability of various forms of digital maps and guides, paper still prevails as the main information medium used by tourists during city visits. The authors describe how recent technologies for digitally augmented paper maps can be used to develop interactive paper maps that provide value-added services for tourists through digital(More)
Awareness of the activities of other users and also document evolution is an important part of collaborative authoring. We introduce the concept of an editing profile that can be used to maintain and visualise measures of the changes made across a document by different users in both synchronous and asynchronous collaborative editing. It provides a simple(More)
Operational transformation has been identified as an appropriate approach for consistency maintenance in real-time collaborative editing systems. Various operational transformation algorithms [2,10,16,15,12,19] can be applied only for applications that use a linear representation of the document. We propose a new algorithm called treeOPT (tree OPerational(More)
While traditional usability testing methods can be both time consuming and expensive, tools for automated usability evaluation tend to oversimplify the problem by limiting themselves to supporting only certain evaluation criteria, settings, tasks and scenarios. We present CrowdStudy, a general web toolkit that combines support for automated usability(More)