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Keyphrases provide semantic metadata that summarize and characterize documents. Kea is an algorithm for automatically extracting keyphrases from text. We use a large test corpus to evaluate its effectiveness in terms of how many author-assigned keyphrases are correctly identified. The system is simple, robust, and publicly available. Kea identifies(More)
Keyphrases are an important means of document summarization, clustering, and topic search. Only a small minority of documents have author-assigned keyphrases, and manually assigning keyphrases to existing documents is very laborious. Therefore it is highly desirable to automate the keyphrase extraction process. This paper shows that a simple procedure for(More)
Supporting awareness of others is an idea that holds promise forimproving the usability of real-time distributed groupware.However, there is little principled information available aboutawareness that can be used by groupware designers. In thisarticle, we develop a descriptive theory of awareness for thepurpose of aiding groupware design, focusing on one(More)
Fisheye views allow people to see both a focus region and the surrounding context in the same window. However, the magnification effects of the fisheye lens can cause several problems for users. One of these is focus-targeting, where a user moves the focus to a new location. Magnification makes focus-targeting difficult because objects appear to move as the(More)
Users of synchronous groupware systems act boti as individual and as members of a group, and designers must try to support both roles. However, the requirements of individuals and groups often cofic$ forcing designers to support one at the expense of the other. me tradeoff is particularly evident in the design of interaction @hniques for shared workspaces.(More)
Open-source software development projects are almost always collaborative and distributed. Despite the difficulties imposed by distance, these projects have managed to produce large, complex, and successful systems. However, there is still little known about how open-source teams manage their collaboration. In this paper we look at one aspect of this issue:(More)
Researchers in Computer Supported Cooperative Work have recently developed discount evaluation methods for shared-workspace groupware. Most discount methods rely on some understanding of the context in which the groupware systems will be used, which means that evaluators need to model the tasks that groups will perform. However, existing task analysis(More)