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Highly desirable types of networked multimedia applications should adapt to changes in the environmental conditions in which they operate, such as communication bandwidth, available memory, and battery lifetime, while providing the best possible quality of service (QoS). In this paper we present a software architecture that facilitates the development of adaptive networked multimedia applications...
Testing services offered at runtime is gaining more and more importance. This arises because the number of applications in which services don't know each other a priori grows and occurring faults can cause high costs. The approach proposed here uses testing to assure QoS properties like e.g. real-time features and functionality of services. A challenge of testing is not to overload the service providing...
Real-time, embedded and safety-critical systems have to meet some quality criteria in order to provide certain reliance on its operation. The quality of a system depends on the complex composition of the quality of its subsystems. Quality composability depends on matchmaking the provided and required quality specifications. To allow for flexibility during the system design, we study composability...
Cloud computing offers the potential to dramatically reduce the cost of software services through the commoditization of information technology assets and on-demand usage patterns. However, the complexity of determining resource provision policies for applications in such complex environments introduces significant inefficiencies and has driven the emergence of a new class of infrastructure called...
With the spread of Internet technologies, the severe competition among businesses, many organizations are moving towards integrating their services online. Service Oriented Architecture (SOA) has shown a potential features in facilitating and managing services integration and expose them through a Portal application. The marriage of these two new standards will definitely lead to a full fledge service...
Service Oriented Architecture (SOA) technology enables composition of large and complex computational units out of the available atomic services. Due to the dynamic nature of SOA the implementation of SOA brings about many challenges, for instance, in terms of service discovery, service interaction, service composition, robustness, quality of service, etc. SOA may often need to dynamically (re)organizing...
In the business context, accountability has become a major concern for businesses around the world in aftermath of corporate scandals and fallouts. However, accountability has not been rigorously considered in IT system technologies and solutions. The goal of this study is to provide a clear understanding of accountability concept in service-oriented computing and, more generally, e-society. We first...
In SOA, Reputation-Based Trust (RBT) mechanism is applied to achieve trust management. RBT enables services to assess the trust level of other services based on the reputation accumulated from user recommendations. A key challenge to apply RBT is to prevent the strategic behavior of users when they provide recommendations - they might give unfair ratings to benefit themselves. In this paper, we propose...
Service Oriented Architecture (SOA) is not only an architecture, rather it is a relationship between the service provider, broker and user. Designing middleware platforms for this architecture really helps in achieving interoperability, loose coupling and high efficiency especially for applications running in heterogeneous environments. The job of an SOA middleware is to cater for the functional properties...
Virtual machines offer unique advantages to the scientific computing community, such as Quality of Service(QoS) guarantee, performance isolation, easy resource management, and the on-demand deployment of computing environments. Using virtual machines as a computing resource within a distributed environment, such as Service Oriented Architecture (SOA), creates a variety of new issues and challenges...
Service Oriented Architecture (SOA) is the most important and effective software paradigm to design Internet-based services. Using the SOA technology, value-added services can be easily deployed as a combination of existing Web services. In this context, WS-BPEL language has become the SOA industrial standard. To allow services to be composed, business relationships between providers and consumers...
Future software systems will be dynamic service oriented systems. Service-Oriented Architecture (SOA) provides an extensible and dynamic architecture to be used, for example, in smart environments. In such an environment, software has to adapt its behaviour dynamically. Thus, there is a need for Verifying and Validating (V & V) the adaptations at run-time. This paper contributes to that by introducing...
Many computer systems and applications must be “non-stop” that is, provide continuous and uninterrupted services. Meanwhile, Service-Based Applications (SBAs) should be dynamic in terms of adap¬tability in order to operate and evolve in highly dynamic environments. Thus, in general, non-stop service-based applications require the ability to be updated without interruption. Flurry of researches on...
The SERSCIS project aims to support the use of interconnected systems of services in Critical Infrastructure (CI) applications. The problem of system interconnectedness is aptly demonstrated by 'Airport Collaborative Decision Making' (A-CDM). Failure or underperformance of any of the interlinked ICT systems may compromise the ability of airports to plan their use of resources to sustain high levels...
Service-Oriented Applications (SOA) are being regarded as the main pragmatic solution for distributed environments. In such systems, however each service can response the user request independently, it is essential to compose them for supplying a compound value-added service. Since, there may be a number of compositions to create the requested service, it is important to find one which its properties...
Due to the rapid development of the information & communication technology and the platform technology, various types of converged service are appeared. The converged service platform technology comes into the spotlight because it enables that the converged service is more easily implemented and also efficiently deployed. This paper discusses requirements and consideration for billing management...
Networked control systems give rise to several new problems which need to be resolved for successful development of such control systems. One of the most important is to develop a software framework with appropriate architecture and mechanisms for rapid, reliable, and evolvable distributed control applications. In particular, timeliness in the interaction among entities which constitute the overall...
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...
The power of social networks stems from their ability to capture real-world phenomena such as collaboration, competition, and partnerships. Social networks provide means for enterprises to capture and expose many informal connections between their stakeholders. In this paper, we discuss how social networks could sustain growth and unfold business opportunities in modern enterprises. Furthermore, we...
SLAs play an important role for the QoS-driven service composition. Meanwhile, the temporal constraints are one of the main elements in the management of SLA especially in specifying the validity period of the QoS offers. In practice, the temporal constraints should be generated dynamically by taking the resource capability of the provider into account. The generation should consider various parameters...
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