1. Distributed Programming Infrastructure for Ubiquitous Presence Joint research between Compaq CRL and Georgia Tech (*) Researchers: Kishore Ramachandran (*), Jim Rehg, Kath Knobe, Jamey Hicks, R. S. Nikhil Students (*) : Nissim Harel, Sameer Adhikari, Arnab Paul, Durga Devi Mannaru, Bikash Agarwalla, Matt Wolenetz, Kirill Mechitov, Hasnain Mandviwala

2. Ubiquitous Presence Application context: - distributed sensors with varying capabilities - interactive response time Project theme: - seamless programming system spanning sensors and backend servers Skiff Storage server pda hallway Skiff Compute clusters sensors

3. Research Issues n Heterogeneity of Components n Stream-oriented and time-sequenced data n High Availability n Clients leave and join arbitrarily n Resource management n Security and Privacy

4. Background Research: Stampede n Cluster programming system l Protection domains and threads l Abstractions for stream-oriented and time-sequenced data iSpace-time memory (STM) STM Resources P1 Logical picture P2 P3 P4.. P1P3P4 N1N2N3 Physical picture of Stampede on multiple nodes and address spaces (Digital Unix, Solaris, Linux or NT cluster) P2

5. Distributed Stampede C Client Surrogate Thread Java Client Interface Exporting Stampede API Stampede abstractions Other Threads on Cluster clients cluster n builds on stampede n currently supports heterogeneity and dynamic clients

6. Distributed Stampede Demo Cluster skiff Stampede client (C) Stampede Application (C) skiff Stampede client (C) STM socket Display (Java or C)....

7. Potential Application Scenarios n Telepresence n Distributed Aware environments l home l office l classrooms n Surveillance n Safe neighborhoods n Eco systems