Gaia1 A middleware Infrastructure to Enable Active spaces Gaia -2- Gaia -3- Abstract Gaia: A middleware Infrastructure to Enable Active spaces we present an experimental middleware infrastructure called Gaia that we have used to prototype the resource management of and provide the user-oriented interfaces for such physical spaces populated with network-enabled computing resources. To limit the scope of research:: focus on physical spaces used for teaching ; classrooms, offices, and lecture room the system can help satisfy the requirements for user-centricity and mobility. Gaia Instruction Motivation Gaia prototype environment (1) Active Spaces : user A requirement of Active Spaces is to support the development and execution of user-centric mobile applications Physical spaces Gaia prototype environment (2) Active Spaces : user A requirement of Active Spaces is to support the development and execution of user-centric mobile applications Gaia our vision Gaia Our approach Gaia -9- Sidebar 1- Gaia OS Evolution Gaia Gaia: an Active Space System Software Infrastructure Gaia -11- Gaia Kernel Event Manager event distribution implementation a decoupled communication model Context Service Presence Service Space repository Context File System Gaia Gaia Kernel Gaia -13- Gaia -14- Gaia application Framework Gaia -16- Gaia Gaia management Tools Gaia -18- Gaia Lua: Gaias scripting language Gaia -20- Gaia Bootstrap Gaia -22- Sidebar2-Gaia OS: Extending Traditional Operating Systems to Physical Spaces Gaia -23- Gaia Gaia Utilization Example: The presentation Manager Gaia -25- Gaia Related work Gaia Conclusions, Contributions, and future work