Cloud computing is a newly emerged computing infrastructure that builds on the latest achievements of diverse research areas, such as Grid computing, Service-oriented computing, business process management and virtualization. An important characteristic of Cloud-based services is the provision of non-functional guarantees in the form of Service Level Agreements (SLAs), such as guarantees on exe...

Services are becoming widely used in the world of engineering and manufacturing as well. Both traditional and computational resources are often encapsulated as Web services, providing the basis for building service-oriented architectures (SOA) based on standards. Services are used on the basis of contractual agreements. A service level agreement (SLA) provides the operational definition of a se...

This paper proposes to integrate security parameters into the Service Level Specification (SLS) template proposed in the Tequila project to improve SLA-based management of QoS [8, 21]. Integrating those parameters in the QoS part of the Service Level Agreement (SLA) specification is essential in particular for secure multimedia services since the QoS is negotiated when the multimedia service is...

In this work we propose GXLA, a language for the specification of Service Level Agreements (SLA). GXLA represents the implementation of the Generalized Service Level Agreement (GSLA) information model we proposed in a previous work. It supports multi-party service relationships through a role-based mechanism. It is intended to catch up the complex nature of service interactivity in the broader ...

In mobile/wireless 1P network where frequent mobility is encountered, it is required to accommodate Internet Quality of Service (QoS) mechanisms such as Differentiated Services (DiftServ) for mobile hosts. In this paper, we consider the issue of integration of mobile 1P and DiffServ including handoff condition and propose the schemes with hierarchical agent architecture for supporting QoS in mo...

BACKGROUND Hephaestin is a multicopper ferroxidase required for basolateral transport of iron from enterocytes. Sex linked anaemia (sla) mice have a defect in the release of iron from intestinal enterocytes into the circulation due to an interstitial deletion in the hephaestin gene (heph). RESULTS We have demonstrated that hephaestin is primarily localised to a supranuclear compartment in bot...

This paper discusses a framework for contract-based monitoring and adaptation with respect to customers’ goals seen as an important part of Service Level Agreement (SLA) contracts. Within standard SLA contracts concepts, as mutual agreements between service providers and users, we introduce Key Goal Indicators (KGIs). These are parameters that state how well service-based processes achieve the ...

Service-Oriented Architecture (SOA) represents an architectural shift for building business applications based on loosely coupled services. In a multi-layered SOA environment the exact conditions under which services are to be delivered can be formally specified by Service Level Agreements (SLAs). However, typical SLAs are just specified at the top-level and do not allow service providers to ma...

To establish an evidence base for future computer-assisted language learning (CALL) design, CALL research needs to move away from CALL versus non-CALL comparisons, and focus on investigating the differential impact of individual coding elements, that is, specific features of a technology which might have an impact on learning (Pederson, 1987). Furthermore, to help researchers find possible expl...

Rapid technological developments in Information Technology (IT) and ubiquitous Internet access are causing serious challenges in service provisioning and resource management landscapes. Cloud computing is proving to be a reliable technology to address these challenges. Service provisioning in the Cloud relies on Service Level Agreements (SLAs) representing a contract signed between the customer...