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This paper introduces a model to represent the information systems using a tactical service-oriented infrastructure (TSI) together with the orchestrations of core services providing the reactive/proactive connectivity mechanisms within TSIs in/out chains. The model was instantiated with services realizing an algorithm behaving differently under stable or unstable network conditions. A quantitative...
The aim of this paper is to propose a framework analysis of urban bus transport service quality in Moroccan context. This framework is based on the principle of combining the user and the service managers, delegating authority and transport operator, vision and consists of three modules. Namely: Definition, evaluation and management of service quality. This paper will be carried out as follows: first,...
Usability is considered as one of the most important quality factors for commercial Web interfaces, along with others such as performance and security. However, most of usability evaluation methods for these Web applications do not support automatic measures. This paper addresses these issues through the presentation of an automatic evaluation model based on a systematic qualitative technique to validate...
Cloud computing has emerged as the primary and popular computing paradigm recently. Since cloud users move continuously, sustaining the required quality of service (QoS) in a cost effective manner is very challenging. For maintaining the required QoS for a moving user, the current cloud systems use some of the existing service replication or/and migration strategies. However, those policies become...
Service Composition is playing a pivotal role in diverse industries to approach more cost effective solutions in an efficient manner. Web service selection is playing a key role in the domain of the composition and it considers as the most important last informant of successful Automatic service composition. Since it is growing the web services in tremendous speed due to the innovation of cloud computing...
Cloud federation is a group of aggregated providers, who are mutually cooperating and collaborating to share their resources in order to improve each other services. It has lured the attention of commercial industries towards itself for its effective utilization of cloud resources. Effective management of the resource is very much required in order to increase the profits of an individual service...
With the increase in number of mobile devices deployed in cloud computing, the demand of context-aware services to assign increases. Indeed, Information about the user's environment exposes new challenges to cloud computing in terms of location-aware, time-aware, device-aware and personalized applications to cope with the constraints of mobile devices in matters of interaction abilities and communication...
Video traffic, which represents an increasing fraction of the Internet traffic, requires end-to-end quality of service (QoS) guarantees for inter-domain routing. However, providing such guarantees remains a challenge essentially because it requires a strong and fair cooperation among the different network operators or Autonomous Systems (ASes), crossed by the traffic. Having a single AS on the path...
Reputation of Web service plays an important role in selecting the best service from massive services. Traditional approaches of measuring Web service reputation are based on all the historical ratings. Although these approaches are effective in the same context environment, they fail in obtaining accurate reputation measurement when users' context is different. In this paper, we propose a context-based...
Service-oriented environments comprise a number of interconnected service providers and service consumers and are filled by vast numbers of services of various functionalities with different qualities. Finding the desirable services among others is a major problem for a typical user, who can optimize its performance by utilizing services with good qualities. This problem is sometimes addressed by...
Composite applications leveraging the functionalities offered by Web services are today the underpinnings of enterprise computing. However, current Web services composition systems make only use of functional requirements in the selection process of component Web services, while the transactional consistency and quality of service (QoS) are crucial parameters of most business applications. In this...
With the fast adoption of Services Computing, even more driven by the emergence of the Cloud, the need to ensure accountability for quality of service (QoS) for servicebased systems/services has reached a critical level. This need has triggered numerous researches in the fields of trust, reputation and provenance. Most of the researches on trust and reputation have focused on their evaluation or computation...
In the distributed commercial environment, many enterprises utilize Web services to provide their resources such as data and applications to consumers. They collaborate with other relevant enterprises to accomplish tasks by sharing processes and resources. However, it is difficult to find the appropriate web service combination for enterprise, because the Quality of Services (QoS) that are widely...
Enterprise Service Bus (ESB) allows the integration of pervasive, distributed and networked systems more and more designed as a composition of atomic and heterogeneous services. Offered services have various types of Quality of Service (QoS) that can be unpredictable and may lead to undesirable situations such as service unavailability, high response time, decrease of reliability, etc. These kinds...
Consumer protection is an issue of great importance to Saudi Arabia, leading to the formation of a consumer protection agency as part of the Ministry of Commerce and Industry. However, studies have shown that this agency has not ensured adequate protection for consumers. This paper investigates whether better consumer protection may be achieved in Saudi Arabia through the design and implementation...
Context-awareness is a key requirement in many of today's networks, services and applications. Context Management systems are in this respect used to provide access to distributed, dynamic context information. The reliability of remotely accessed dynamic context information is challenged by network delay, packet drop probability, information dynamics and the access strategies taken. QoS classification...
Accounting for quality correlations among web services when performing service composition is essential to obtain more accurate quality estimations of service combinations, thus providing users with better composite solutions. Yet, most current composition approaches fail to address such correlations by assuming independence between services regarding their quality values. In response, this paper...
Context information is traditionally collected from distributed digital artifacts and services and made available to similarly distributed, and often mobile, context consuming applications via context brokers or servers. Contextual data has a strong temporal element i.e. it remains valid for a period of time, and hence is an ideal candidate for caching strategies that aim to exploit such locality...
A comprehensive summary for QoS-aware web service composition, including QoS models and searching algorithms, has been presented in this paper. First, we have introduced the basic workflow models for service composition and their corresponding QoS aggregation functions. Then, traditional approaches for QoS-aware composition are divided into two groups: mathematical programming and heuristic algorithms...
Cloud computing is an emerging paradigm able of flexibly offering IT resources and services over the Internet. Cloud computing's high flexibility needs novel software engineering approaches, and technologies to deliver agile, flexible, scalable yet secure software solutions with full technical (e.g. QoS, service continuity etc.) and business gain (e.g. profit, corporate value, utility etc.). Agile...
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