Abstract: Existing platforms are built with a static network connecting microprocessor, radio, clock system, and other components. This static configuration prevents researchers from experimentally validating the trade-offs between the way that clocks are conditioned and distributed, and the performance of the embedded system. In particular, such design decisions have major impact on time synchronization.

Abstract: We are at the end of a four­year effort that has dramatically improved the capability of the use of RF sensors, particularly those that measure received signal strength (RSS) to sense the locations and context of people in buildings and homes.  We have investigated both systems which use RFID tags to identify a person or object, and those which use a static deployed network of transceivers for device­free localization, to locate people moving in the environment who do not carry any tag or device.  Locating people who don’t wear a de

Abstract: Central to the operation of cyber-physical systems (CPS) is accurate and reliable knowledge of time, both for meaningfully sensing and controlling the physical world state and for correct, high-performance and energy-efficient orchestration of computing and communication operations. Emerging applications that seek to control agile physical processes or depend on precise knowledge of time to infer location and coordinate communication, make use of time with diverse semantics and dynamic quality requirements.