Octav Chipara
One Brookings Drive,
Campus Box 1045,
St. Louis, Missouri
63130-4899
Phone: 314-935-7535

• Chenyang Lu

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Journals

1. D. Gannon, J. Alameda, O. Chipara , M. Christie, V. Dukle, L. Fang, M. Farellee, G. Fox, S. Hampton, G. Kandaswamy, D. Kodeboyina, C. Moad, M. Pierce, B. Plale, A. Rossi, Y. Simmhan, A. Sarangi, A. Slominski, S. Shirasauna, T. Thomas
   Building Grid Portal Applications from a Web-Service Component Architecture
   IEEE Distributed Computing on Grid Systems
2. G. Xing, M. Sha, G. Hackmann, K. Klues, O. Chipara and C. Lu, 
   Towards Unified Radio Power Management for Wireless Sensor Networks,
   Wireless Communications and Mobile Computing, Special Issue on on Distributed Systems of Sensors and Actuators, to appear. [Note: Invited paper]

Conferences

1. C. Lu, G. Xing, O. Chipara, C. Fok, S. Bhattacharya
   MobiQuery: A Spatiotemporal Data Service for Sensor Networks
   ICDCS '05: Proceedings of the 25th IEEE International Conference on Distributed Computing Systems (ICDCS'05) [Acceptance ratio 14%]
2. O. Chipara, C. Lu, G. Roman
   Efficient Power Management based on Application Timing Semantics for Wireless Sensor Networks
   ICDCS '05: Proceedings of the 25th IEEE International Conference on Distributed Computing System (ICDCS'05) [Nominated for best paper award, Acceptance ratio 14%] [ppt]
3. S. Bhattacharya and G. Xing and C. Lu and G. Roman and O. Chipara and B. Harris,
   Dynamic Wake-up and Topology Maintenance Protocols with Spatiotemporal Guarantees
   IPSN '05: Proceedings of the 4th international symposium on Information processing in sensor networks (IPSN'05)  [Acceptance ratio 20%]
4. O. Chipara, Z. He, G. Xing, Q. Chen, X. Wang, C. Lu, J. Stankovic, T. Abdelzaher
   Real-time Power Control in Wireless Sensor Networks
   IWQOS'06: 14th IEEE International Workshop on Quality of Service (IWQoS'06) [Acceptance Ratio 17%]
5. O. Chipara, C. Lu and J. Stankovic
   Dynamic Conflict-free Query Scheduling for Wireless Sensor Networks
   ICNP '06: Proceedings of the 2006 14th IEEE International Conference on Network Protocols (ICNP'06)[Acceptance ratio 14%]
6. K. Klues, G. Hackmann, O. Chipara, C. Lu
   A Component Based Architecture for Power-Efficient Media Access Control in Wireless Sensor Networks
   SenSys '07: Proceedings of the 5th international conference on Embedded networked sensor systems (SenSys'07)
7. O. Chipara, C. Lu, G. Roman
   Real-time Query Scheduling for Wireless Sensor Networks.
   RTSS'07: Proceedings of the 28th IEEE Real-Time Systems Symposium (RTSS'07)
8. G. Hackmann, O. Chipara and C. Lu,
   Robust Topology Control for Indoor Wireless Sensor Networks [camera ready under prepration]
   SenSys'08:  Proceedings of the 6th international conference on on Embedded Networked Sensor Systems (SenSys'08), November 2008.

1. Towards Predictable Wireless Cyber-physical Applications
   O. Chipara, C. Lu
   ACM SIGBED Review (RTSS'07 Phd Forum)
   
2. S. Bhattacharya, O. Chipara, B. Harris, C. Lu, G. Xing, C. Fok
   MobiQuery: a spatiotemporal data service for sensor networks
   SenSys '04: Proceedings of the 2nd international conference on Embedded networked sensor systems
3. D. Gannon, M. Christie, O. Chipara, L. Fang, M. Farrellee, G. Kandaswamy, W. Lu, B. Plale, A. Slominski, A. Sarangi, and Y. L. Simmhan. Building
   Grid Services for User Portals
   GGF Workshop on Designing and Building Grid Services, Chicago, 2003.

Patents

1. Method and apparatus for processing electronic forms for use with resource constrained devices. alSafadi, Yasser; Chipara, Octav; Yassin, Amr F., Zhu, Katie
2. Method for managing a metric for use on a diagnostic medical modality and apparatus and method for conducting a medical investigation. Alsafadi; Yasser, Chipara; Octav
3. System and method for controlling a robot. Alsafadi; Yasser; Chipara; Octav Yassin; Amr
4. Robotic web browser. Yassin; Amr; AlSafadi; Yasser; Chipara; Octav 

Under submission

1. DCQS -- journal TPDS
2. Mobiquery -- journal TECS
3. RTQS --  journal TPDS

I'm working on developing real-time communication protocols for wireless sensor networks that provide predictable QoS and are energy efficient:

1. Minimizing the impact of sleep schedules on message latencies
   • Efficient Power Management based on Application Timing Semantics for Wireless Sensor Networks
2. Providing real-time performance for mobile users in the presence of low duty cycles
   • MobiQuery: A Spatiotemporal Data Service for Sensor Networks
   • Dynamic Wake-up and Topology Maintenance Protocols with Spatiotemporal Guarantees
3. Using dynamic power control to reduce deadline miss ratios:
   • Real-time Power Control in Wireless Sensor Networks
4. Real-time scheduling using TDMA for wireless sensor networks to provide predictable QoS such end-to-end delays, network capacity and network life-time:
   • Dynamic Conflict-free Query Scheduling for Wireless Sensor Networks,  Chipara, Octav; Lu, Chenyang; Stankovic, John. Accepted at ICNP
   • Real-time Query Scheduling for Wireless Sensor Networks. Octav Chipara, Chenyang Lu, Gruia-Catalin Roman