1. NILE-PDT: A Phenomenon Detection and Tracking Framework for Data Stream Management Systems M.H. Ali 1, W.G. Aref 1, R. Bose 2, A.K. Elmagarmid 1, A. Helal 2, I. Kamel 3, M.F. Mokbel 1 1 23

2. What is going on in a sensor field? “Nile-PDT”: Phenomena Not Data! What are the sensor readings? 27 o C 29 o C 27 o C 90 o C 29 o C 25 o C 30 o C31 o C 26 o C 28 o C 90 o C 29 o C 90 o C 27 o C 29 o C 27 o C 90 o C 29 o C 25 o C 30 o C31 o C 26 o C 28 o C 91 o C 29 o C 90 o C 91 o C 90 o C 89 o C Report a fire alarm in this region  Sensors do not live in isolation  Sensors indulge in a correlated behavior and generate a “phenomenon”

3. What is a Phenomenon?  A phenomenon is a group of sensors that show “similar” behavior over a period of time  Notions of similarity (a) Generate the same value (i.e., discrete phenomena) (b) Generate similar values (e.g., distance (v1,v2)<=d) (c) Generate similar behavior (e.g., similar summaries) (d) Generate similar trends (correlated increase or decrease in values) 30 o C 27 o C 29 o C 30 o C31 o C (a)(b)(c)(d)

4. Query Processing with Relevance Feedback Relevance feedback contains information about the sensors that contribute to the currently tracked phenomena Sensor Network Binary Join

5. Outline of the Demo UFL Sensor Platform Nile-PDT Sensor Platform Sensor-network Level Server Level Application Level

6. Nile-PDT at the Application Level

7. Nile-PDT at the System Level Relevance feedback

8. Demo Hardware Setup 5 x 5 Sensor Grid with 1” Grid Spacing Photonic Devices Light Sensor Analog Devices Temperature Sensor

9. Sensor Platform Hardware Layered Design For flexible configuration of processing, power, communication, and sensor/actuator needs. Quick Connect For easy and reliable stacking. IP Networking Swappable communication layers to support different mediums. Full TCP/IP stack using µIP. Processor ATmega128 provides low-cost and low-power processing. Runs OS that monitors sensor connections and communicates with server. Internal storage for sensor/actuator OSGi bundles and data accumulation for on-node processing. Sensors / Actuators Interface layer supports analog and digital sensors as well as actuators. Power Wired power option for use with indoor applications. More Power Daisy-chain sensor platforms to create large networks without tying up all outlets.

10. Sensor Platform Software  OSGi based Sensor Network Manager Middleware  Sensor Driver stored onboard Sensor Platform & installed dynamically on OSGi framework when platform powers up  Sensor Driver transforms the sensors connected to the platform into software services

11. Sponsors National Science Foundation Department of Education National Institute on Disability & Rehabilitation Research