The UCSD ActiveCampus project is an exploration of wireless location-aware computing in the university setting. ActiveClass supports classroom activities such as anonymous asking of questions, polling, and student feedback. ActiveCampus Explorer supports several location aware applications, including location-aware instant messaging and maps of the user's location annotated with dynamic hyperlinks of nearby buddies, digital graffiti, etc. This paper describes results on the use of these systems by several hundred students, drawing on observations, aggregate usage data, anecdotes, and the analytical perspective of Ecologies. Analysis exposes novel behaviors, the relevance of proximity in social computing, and a willingness to share location information with others.

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Hemorrhage in trauma patients is associated with an early decrease in Hgb level. Hgb < or =10 gm/dL in the first 30 minutes of patient arrival will correctly identify presence or absence of significant bleeding in almost 9 of 10 trauma patients.