Massively distributed Embedded Systems (MDES) such as Wireless Sensor Networks (WSN) are gaining increasing attention, since they enable a broad range of novel applications starting from monitoring oceans to exploring...
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Position information of moving objects plays a vital role in many pervasive applications. therefore, moving objects databases (MODs), which can manage trajectory data of a number objects, are used in many pervasive sy...
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In this paper we present a new approach to distribute tasks connected by causal dependencies within a heterogeneous environment, e.g. several resources communicating with each other or a processor grid. Our approach u...
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In this paper we present a new approach to distribute tasks connected by causal dependencies within a heterogeneous environment, e.g. several resources communicating with each other or a processor grid. Our approach uses an artificial hormone system for task distribution which is able to meet real-time constraints. Several enhancements of the artificial hormone system are made such as partial suppressing of tasks and distributed task termination.
As newer software construction paradigms like service-oriented architecture (SOA) are adopted into systems of critical importance, it becomes imperative that technology and design artifacts exist that can be utilized ...
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As newer software construction paradigms like service-oriented architecture (SOA) are adopted into systems of critical importance, it becomes imperative that technology and design artifacts exist that can be utilized to raise the resiliency and protection of such systems to a level where they can withstand sustained attacks from well-motivated adversaries. In this paper we describe a sampling of innovative services and mechanisms that are designed for the protection of systems that are based on service-oriented architectures.
Many real-time systems use preemptive priorities in their internals to guarantee certain real-time performance. this includes technologies that range from RTSJ (the real-time Specification for Java) to middleware like...
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Many real-time systems use preemptive priorities in their internals to guarantee certain real-time performance. this includes technologies that range from RTSJ (the real-time Specification for Java) to middleware like real-time CORBA (Common object Request Broker Architecture) which offers additional models and policies that blend client and server information. this decision makes easier the integration of real-time acceptance tests and dispatching policies in these kinds of infrastructures. In this paper, we analyze different tradeoffs that emerge from the definition of different propagation models for distributedreal-time Java. the paper covers technological integration aspects, impact on interfaces, and other practical issues more related to the performance that this model offers to a real-time application.
We present a rigorous model-based approach to the stepwise design of contractual state machines, which are a simplified form of state charts extended with declarative specifications. the approach is based on applicati...
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We present a rigorous model-based approach to the stepwise design of contractual state machines, which are a simplified form of state charts extended with declarative specifications. the approach is based on application of a set of refinement patterns, that can be validated against a formal semantics, and that are implemented using update-in-place model transformations. We describe the integrated tool support we are implementing for this model-based approach, and illustrate the approach with small examples.
Autonomic Systems on Chip provision VLSI systems withthe capabilities of self-organization, self-healing and self-optimization, thereby allowing them to adapt to their environment and improve their functionality thro...
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Autonomic Systems on Chip provision VLSI systems withthe capabilities of self-organization, self-healing and self-optimization, thereby allowing them to adapt to their environment and improve their functionality through run-time learning. this paper presents our current status of work on autonomic SoC architectures, beginning with a robust, self-correcting processor data path architecture and progressing to reinforcement machine learning techniques for self-optimization and self-organization at run time. An outlook of our future work and upcoming challenges in regard to autonomic systems on chip is then presented as a basis for discussion at the SORT workshop, and withthe organic computing community in general.
In classical real-time systems the resources for an application are allocated at system start so that every resource request can be fulfilled in future. this would lead to much internal waste of resources in the case ...
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In classical real-time systems the resources for an application are allocated at system start so that every resource request can be fulfilled in future. this would lead to much internal waste of resources in the case of modern Self-X systems, because these systems have highly dynamic resource consumptions. the Flexible Resource Manager (FRM) was developed to overcome this problem. the manager puts temporarily unused resources at other applications' disposal. In this paper the FRM approach is evaluated by concrete application examples and randomly generated applications.
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