- Modeling Dynamic Reconfigurations in Reo using High-Level Replacement Systems ( ), In Science of Computer Programming, volume 76, 2011.
- Transaction management in Service-Oriented Systems: requirements and a proposal ( ), In IEEE Transactions on Service Computing, volume 2, 2011.
- Towards Decentralized Trading: A Topological Investigation of the Medium and Low Voltage Grids ( ), In IEEE Transactions on Smart Grid, volume 2, 2011.
- Deriving Business Processes with Service Level Agreements from Early Requirements ( ), In Journal of Systems and Software, volume 84, 2011.
- An Online Portal on Outcomes for Dutch Service Users ( ), In Psychiatric Services, volume 62, 2011.
- Declarative Enhancement Framework for Business Processes ( ), In Service-Oriented Computing (G. Kappel, Z. Maamar, H.R. Motahari Nezhad, eds.), Springer, volume 7084, 2011.
While Business Process Management (BPM) was designed to support rigid production processes, nowadays it is also at the core of more flexible business applications and has established itself firmly in the service world. Such a shift calls for new techniques. In this paper, we introduce a variability framework for BPM which utilizes temporal logic formalisms to represent the essence of a process, leaving other choices open for later customization or adaption. The goal is to solve two major issues of BPM: enhancing reusability and flexibility. Furthermore, by enriching the process modelling environment with graphical elements, the complications of temporal logic are hidden from the user.
Keywords: BPM, Variability, Temporal Logic, e-Government
- Assessing Schizophrenia with an Interoperable Architecture ( ), In ACM International Conference on Information and Knowledge Management, 2011.
- OpenFlow supporting inter-domain virtual machine migration ( ), In 2011 Eighth International Conference on Wireless and Optical Communications Networks, 2011.
- An agent-based wide area protection scheme for self-healing grids ( ), In , 2011.
This paper presents a wide area protection multi-agent system with high degree of tolerance to faults. Agents in this protection system detect and locate faults by comparing current measurements across the protected component following principles of conventional differential protection; yet they perform sensor data integrity evaluation through a trip confirmation mechanism, by cooperating and collaborating with neighbor agents. This mechanism prevent from possible false trips caused by measurement failure or a failure of communication channel, resulting in explicit sensor failure detection and location. A missing sensor restoration mechanism is initiated to mitigate the effects of sensor failure, applying a self-healing strategy. The principles of cooperation and collaboration are presented, and the structure and hierarchy of protection agents are designed. © 2011 IEEE.
Keywords: Distributed Energy Resources, Distributed-Intelligence, Fault Detection, Location and Isolation, Multi-Agent System, Self-Healing, Wide-Area Protection
- A distributed fault protection method for power grid with high penetration of renewable energy sources ( ), In , 2011.
This study addresses the fault protection issues that will be caused by the increased penetration of Renewable Energy Sources (RES). A new Distributed Wide Area Differential Protection (DWADP) scheme is proposed to overcome these problems, and hence to improve reliability of power systems. Tools of intelligence are integrated at the relay level, capable of generating optimal responses, based on communication with direct neighbors only, instead of a system wide communication, thus minimizing both the required bandwidth and the degree of connectivity between different relays. The proposed DWADP scheme contains a conventional differential protection scheme cascaded with a trip confirmation mechanism (TCM), which performs sensor data integrity evaluation, and a missing sensor restoration mechanism (MSRM). Hence, false trip can be avoided, while locating sensor failures, thus making it possible to take preventive action. © 2011 IEEE.
Keywords: Fault Location, Fault Tolerance, Power System Protection, Renewable Energy Sources
- A sensor failure resilience metric for ship-board power system ( ), In , 2011.
This study defines a metric of resilience to sensor faults for ship-board power system. Hence, one is able to compare different power system topology with respect to their robustness to sensor faults, which provides valuable information in the design phase. For a given power system topology, we first present a distributed wide area differential protection (DWAPS) scheme, that is able to cope with the difficulties caused by short cables used to connect the various busbars on board. The proposed scheme is an elaboration of previous studies yet integrates tools of intelligence at the relay level based on a communication with direct neighbors only, instead of a system wide communication, thus minimizing both the required bandwidth and the degree of connectivity between different relays. We then demonstrate how to explicitly reconstruct lost data after sensor failure. Finally, we define the minimum number of sensor that makes this restoration possible as sensor failure resilience metric. © 2011 IEEE.
- Continual Planning with Sensing for Web Service Composition ( ), In AAAI Conference on Artificial Intelligence, 2011.
- Heterogeneous Device Discovery Framework For the Smart Homes ( ), In IEEE GCC Conference & Exhibition, 2011.
- Testing for Highly Distributed Service-oriented Systems using Virtual Environments ( ), In Postproceedings of 17th Dutch Testing Day, 2011.
- Smart Homes to Improve the Quality of Life for All ( ), In 33rd Annual International IEEE Engineering in Medicine and Biology Conference, 2011.
- Smart Meter aware Domestic Energy Trading Agents ( ), In International E-Energy Market Challenge at 8th ACM Autonomic Computing Conference, 2011.
- Business Process Customization using Process Merging Techniques ( ), In International Conference on Service-Oriented Computing and Applications, 2011.
- Sensor optimization and placement for enhanced power system monitoring using entropy ( ), In , 2011.
In this paper we propose a new methodology for sensor optimization and placement in a power system. The objectives of this study are to identify basic concepts on sensor optimization and placements to enhance the reliability and for efficient sensor data collection, processing, and transmission. Two approaches based on automatic control and information theory have been proposed. Condition of observability and fault detectability and isolability is developed to determine the optimal number of sensors and to determine the set of candidate sensors necessary for state estimation and fault detection and isolation. An entropy-based heuristic is proposed for the selection of the best sensors candidate that increases the information gain, thereby decreasing the drawback of system complexity and information uncertainty. © 2011 IEEE.
- Interpretation of Inconsistencies via Context Consistency Diagrams ( ), In Annual IEEE International Conference on Pervasive Computing and Communications, 2011.
- Optimizing Offices for the Smart Grid ( ), Technical report JBI 2011-12-01, University of Groningen, 2011.