Tivadar Szemethy

Learn More
Gabor Karsai, Gautam Biswas, Sriram Narasimhan, Tal Pasternak, and Tivadar Szemethy Institute for Software Integrated Systems Vanderbilt University PO Box 1829 Station B Nashville, TN 37235,USA {gabor,biswas,nsriram,tal.pasternak,tivadar}@vuse.vanderbilt.edu Gabor Peceli, Gyula Simon, and Tamas Kovacshazy Department of Measurement and Information Systems(More)
Complex control applications require capabilities for accommodating faults in the controlled plant. Fault accommodation involves the detection and isolation of faults, and then taking appropriate control actions to mitigate the fault effects and maintain control. This requires the integration of fault diagnostics with control in a feedback loop. This paper(More)
In telecommunications networks, distributed power management across heterogeneous hardware requires a standardized representation of each system's capabilities to decouple distributed high-level algorithms from hardware specifics. The Green Abstraction Layer (GAL) provides this interface between high-level algorithms and a lower level representing the(More)
The Internet’s universality is based on its decentralization and diversity. However, its distributed nature leads to operational brittleness and difficulty in identifying the root causes of performance and availability issues, especially when the involved systems span multiple administrative domains. The first step to address this fragmentation is(More)
Recently, a number of approaches based on dynamic power management techniques have been proposed to reduce the energy consumption of telecommunication networks and devices. They are able to optimize the tradeoff between network performance and energy requirements. It is possible to execute and extend these techniques to the whole network, by using local(More)
In this paper we argue for UML-based metamodeling and pattern-based graph transformation techniques in computer-based systems development through an illustrative example from the domain of embedded systems. We present a tool that uses advanced graph-rewriting techniques to generate a schedule that satisfies hard real-time constraints for multi-modal(More)
Fault adaptive systems must adapt and reconfigure themselves to the changes in the environment or the system itself, and have to maintain operation even in case of system failures. In order to avoid performance degradation due to system reconfigurations, adequate reconfiguration management is necessary. This paper describes a fault-adaptive control system(More)
Applying model-based diagnosis techniques to systems that exhibit hybrid behavior presents an interesting set of challenges that mostly revolve around interactions of the continuous and discrete components of the system. In many real world systems, the overall physical plant is inherently continuous, but system control is performed by a supervisory(More)