An Introduction to the Kalman Filter
An Introduction to the Kalman Filter
Policies, grids and autonomic computing
DEAS '05 Proceedings of the 2005 workshop on Design and evolution of autonomic application software
A Policy-Based Decision Making Approach for Orchestrating Autonomic Elements
STEP '05 Proceedings of the 13th IEEE International Workshop on Software Technology and Engineering Practice
Requirements-driven design of autonomic application software
CASCON '06 Proceedings of the 2006 conference of the Center for Advanced Studies on Collaborative research
A performance analysis method for autonomic computing systems
ACM Transactions on Autonomous and Adaptive Systems (TAAS)
SLA based resource allocation policies in autonomic environments
Journal of Parallel and Distributed Computing
The Landscape of Service-Oriented Systems: A Research Perspective
SDSOA '07 Proceedings of the International Workshop on Systems Development in SOA Environments
Towards a Real-Time Reference Architecture for Autonomic Systems
SEAMS '07 Proceedings of the 2007 International Workshop on Software Engineering for Adaptive and Self-Managing Systems
Feedback Control Theoretic Technique for Data Centers
ICAS '07 Proceedings of the Third International Conference on Autonomic and Autonomous Systems
Proceedings of the 2007 workshop on Service-oriented computing performance: aspects, issues, and approaches
Scalable adaptive web services
Proceedings of the 2nd international workshop on Systems development in SOA environments
Adaptive and intelligent path discovery on-demand for wireless networks using service composition
Expert Systems with Applications: An International Journal
A survey of automated web service composition methods
SWSWPC'04 Proceedings of the First international conference on Semantic Web Services and Web Process Composition
A survey of formal methods in self-adaptive systems
Proceedings of the Fifth International C* Conference on Computer Science and Software Engineering
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Software as a service (SaaS) can be delivered by composing software applications using web services hosted in one or more administrative domains. In this context, web service composition has a considerable impact on the delivered service affecting its quality (QoS). There is therefore a need to keep the service QoS parameters under control when the service is delivered by a combination of different web services. This paper investigates the composition of web services, and its implications on the overall QoS guarantees as represented by the service response times, when autonomic computing control mechanisms are in place. A control based approach of the autonomic computing concept is used to investigate the dynamic composition of web services when the service is provided by a set of web services linked via cooperation protocols that define a global process choreography. Web services are modeled as scheduled computational processes waiting in a queue to cooperate in delivering the service. The paper proposes an input-state-output mathematical model for web services and further investigates, in this context, their composition hypothesis, principles, and rules.