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TWL Direction

TWL Direction. Almir Davis. AGENDA. TWL Organization TWL Present (Wireless Sensor Networks) TWL Future Direction (Cyber Physical Systems) CAS Paper: Edward Lee “Cyber Physical Systems: Design Challenges”. TWL Organization. Established 2 years ago Have defined management structure

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TWL Direction

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  1. TWL Direction Almir Davis

  2. AGENDA • TWL Organization • TWL Present (Wireless Sensor Networks) • TWL Future Direction (Cyber Physical Systems) • CAS Paper: Edward Lee “Cyber Physical Systems: Design Challenges”

  3. TWL Organization • Established 2 years ago • Have defined management structure • Meeting room and website are available • Meetings on a regular weekly basis • Membership: varies from year to year (currently ~5 regular members)

  4. TWL Organization – To Do List • Define the new technical area focus (CAS) • Push senior/PH.D. members of the lab to define their project directions so that junior members can help out by digging deep into some aspects of those projects • Maintain the website and make sure all the intern presentations use TWL PowerP. template • Extend the alliance with Microsoft

  5. TWL Organization – To Do List • Continue attracting new members once the attractive projects are defined and put in motion • keep regular meeting schedule, meeting notes • Keep an active spreadsheet (make it available online) of all papers read (date, name, key conclusions) • Have some pizza available for meetings 

  6. TWL Present • Wireless Sensor Networks (WSN) • Read number of papers/publications • Possess knowledge in key WSN issues • Capable to develop real Tufts WSN platforms using TI WSN sensor kit • Have current students doing there graduate work in WSN

  7. TWL Future (part 1) • Cyber Physical Systems • Gain knowledge and expertise by reading papers/publications (as many as possible) • Share the knowledge among group members by presenting at least 1 paper per week (full time students maybe 2) • Find a focus in the area that is large enough to allow multi-student involvement

  8. TWL Future (part 2) • Cyber Physical Systems • Once the projects are established ask individuals to hand in a detailed task schedule with major trackable milestone • Prof. Chang to approve the schedules and track the progress accordingly

  9. E. Lee: “Cyber Physical Systems: Design Challenges”(1) • Cyber-Physical Systems (CPS) are integrations of computation and physical processes • The economic and social potential of CPS systems is vastly greater than what has been realized, and major investments are being made worldwide to develop the technology • There are considerable challenges, particularly because the physical components of such systems introduce safety and reliability requirements qualitatively different from those in general purpose computing.

  10. Potential Fields • high confidence medical devices and systems, • assisted living, • Traffic control and safety, • advanced automotive systems, • Process control, • energy conservation, • environmental control, • avionics, instrumentation, critical infrastructure control • distributed robotics (telepresence, telemedicine), • defense systems, manufacturing, • smart structures.

  11. Requirements • Reliability • Predictability • Timing certainty • Concurrency • System understanding

  12. Background • Comparison with embedded system • inadequate due to CAS’s much larger scope • System flat bench scaled toward smaller systems • Aging (“Evidently, efficiency is nearly irrelevant compared to predictability, and predictability is difficult to achieve without freezing the design at the physical level”)

  13. Background (1) • Time synchronization across networks • (“The most widely used networking techniques today introduce a great deal of timing variability and stochastic behavior.”) • Concurrency of embedded systems • (“embedded systems must react to multiple real-time streams of sensor information and control multiple actuators concurrently”)

  14. Background (2) • Time synchronization across networks • (“The most widely used networking techniques today introduce a great deal of timing variability and stochastic behavior.”) • Concurrency of embedded systems • (“embedded systems must react to multiple real-time streams of sensor information and control multiple actuators concurrently”)

  15. Solutions (1) • New computing concepts needed • (“Advances in formal simulation, emulation and verification will help but won’t be enough”) • Predictable models • (“Instead of starting with a highly nondeterministic mechanism like threads, and relying on the programmer to prune that nondeterminacy, we should start with deterministic, composable mechanisms, and introduce nondeterminism only where needed”) • Timing precision • (“possible if we are willing to sacrifice performance”)

  16. Solutions (2) • Reflect behavioral properties in interfaces • (“ability to develop and compose specialized “interface theories”) • Coordination Language • (“introduce new semantics at the component interaction level rather than at the programming language level”)

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