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Policy-based concept and service-oriented design are two promising techniques in network management. In this paper we show that integrating policy-based management with service-oriented design can significantly improve the autonomic and flexible capabilities for management. In particular, we propose an architecture that covers policy modeling, specification and enforcement in a service-oriented manner...
Composing distributed trivial grid services into composite and more powerful services is an effective way to realize grid resource sharing and function reuse. BPEL4Grid is a grid-compliant workflow engine which supports for WSRF standard and GSI mechanism. But BPEL4Grid has some limitations such as its static workflow model and lack of task migration when target service is invalid. Aiming to resolve...
For the stream-like applications with high-bandwidth and low latency, optimizing the memory latency can effectively improve the QoS. In this paper, we propose a dedicated adaptive loop pre-fetch mechanism to reduce the memory latency and also improve the pre-fetch accuracy. In the mechanism, when a loop sequences is detected, the stream pre-fetch engine can adaptively initiate the pre-fetch operation...
Web services enable to achieve an interoperability between heterogeneous data mining applications through platform and language independent interfaces. As the number of available data mining services increases, it becomes more difficult to find a service that can perform a specific task at hand. Moreover, there may also be no such single data mining service capable of performing the specific task,...
With the rapidly growing number of Web services throughout the Internet, Service Oriented Architecture (SOA) enables a multitude of service providers (SP) to provide loosely coupled and inter-operable services at different Quality of Service (QoS) levels. This paper considers the services are published to a QoS-aware registry. The structure of composite service is described as a Service Orchestration...
Services participating in the composition are usually co-ordinated according to a workflow, composed by several activities, each of which carried out by a service. The binding of services to workflow activities may be affected by several parameters (e.g., QoS, price, reputation, etc.). In this paper, we propose a service binding driven by a further important requirement, that is, the incompatibilities...
A simple and effective composition of software services into higher-level composite services is still a very challenging task. Especially in enterprise environments, quality of service (QoS) concerns play a major role when building software systems following the service-oriented architecture (SOA) paradigm. Inthis paper we present a composition approach based on a domain-specific language(DSL) for...
Syntactic composition languages like BPEL, WSCI are insufficient for end users because of many technical details. In order to reduce the complexity of service composition, various approaches based on semantic technologies and planning techniques have been developed for automatic service composition. However these approaches have focused on composition aspects and have not facilitated users expressing...
The increasing interest in Web services has led to a recent proliferation of service-oriented platforms for supporting Scientific Workflows in a variety of e-Science domains. These platforms mainly address the application-specific composition and enactment of workflows. However, since scientific workflows are characterized by complex computations and large volumes of data, non-functional criteria...
The context-aware computing is a research field that defines systems capable of adapting their behavior according to any relevant information about entities (e.g., people, places and objects) of interest. Ubiquitous systems are closely related to the use of contexts and are frequently shared among multiple users, once they are designed to be embedded into everyday environments such as houses, cars,...
We discuss the design of a common application requirement interface (CAPRI) for cognitive wireless networks. Applications can use CAPRI to express optimization goals and policies they expect the network to follow, which can subsequently be used by cognitive engines in their optimization processes. We believe that CAPRI design fills in an important gap in the current architectural understanding of...
The architecture of visual process modeling tools for Web services composition based on BPEL is introduced in detail. The concepts of arcs and nodes are imported and a visual process editor is implemented. Meanwhile, graphical method and the mapping technology which maps flow chart to BPEL elements are adopted. We give the method of describing QoS ontology of Web services and propose a solution to...
Business-to-business workflow interoperation across Virtual Organisations (VOs) brings about possibilities for novel business scenarios. In such business scenarios, parts of workflows corresponding to different partners can be aggregated in a producer-consumer manner,making hierarchical structures of added value. Service Level Agreements (SLAs),which are contracts between service providers and service...
The context-aware computing is a research field that defines systems capable of adapting their behavior according to any relevant information about entities (e.g.,people, places and objects) of interest. The ubiquitous computing is closely related to the use of contexts, since it aims to provide personalized, transparent and on-demand services. Ubiquitous systems are frequently shared among multiple...
The success of today enterprises depends on their capability to respond on demand to challenging customers' request. At the same time, the enterprise marketplace is characterized by high dynamicity and heterogeneous requests. This makes difficult to provide in house cost-effective services able to meet them and, in many cases, the only solution is to aggregate different services at this purpose. In...
We present an architecture for self-configuration of network entities for QoS and Security, based on the health of the network. In the architecture, we firstly present a novel data collection mechanism that integrates various network inputs such as flow data, packet data and SNMP values. Secondly we present our analysis of these inputs based on QoS and Security aspects and discuss analysis mechanisms...
QoS-based Web service (WS) discovery has been recognized as the main solution for filtering and selecting between functionally equivalent WSs stored in registries or other types of repositories. There are two main techniques for QoS-based WS matchmaking (filtering): ontology-based and constraint programming (CP)-based. Unfortunately, the first technique is not efficient as it is based on the rather...
By adopting standard-based protocols, service components from different providers can be conveniently integrated into a composite service regardless of their locations, platforms and/or hardware speeds. This paper presents a framework to facilitate dynamic service composition, selection and adaptation of QoS-aware Web services towards pervasive computing. Considering both functional and QoS characteristics...
We developed a quality of service (QoS) management system to support service level management (SLM) for global enterprise services. The QoS management system is integrated with one of our enterprise services in a preproduction system, an identical system as the production system but in a test environment. Lab experiments showed that our integrated solution helps global enterprise services to better...
As Grid networks grows, the complexity of resource management in Grid networks dramatically increases. To manage the Grid resources efficiently, policy based resource management system is suitable. However, the policy which made at a moment could not be appropriate to other time because the condition of the grid resources with time space changes. Thus, in this paper, we propose asynchronous policy-based...
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