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In the absence of legal authorities and enforcement mechanisms in open e-marketplaces, it is extremely challenging for a user to validate the quality of opinions (i.e. Ratings and reviews) of products or services provided by other users (referred as advisers). Rationally, advisers tend to be reluctant to share their truthful experience with others. In this paper, we propose an adaptive incentive mechanism,...
The increasing amount of smart devices and handheld devices have widened the amount of information presence all over. The application running on one device can be distributed to a surrounding device for better functionality. A capability that might be enjoyable or frustrating for end user. This paper has identified the factors that contribute to the loss of user experience for seamless application...
This paper discusses technical considerations of a Cloud infrastructure which interacts with mobile devices in order to migrate part of the computational overhead from the mobile device to the Cloud. The aim of the interaction between the mobile device and the Cloud is the enhancement of parameters that affect the Quality of Experience (QoE) of the mobile end-user through the offloading of computational...
In order to choose from a list of functionally similar services, users often need to make their decisions based on multiple QoS criteria they require on the target service. In this process, different users may follow different decision making strategies, some are compensatory in which only an overall value on all the criteria is evaluated, some evaluate one criterion at a time in the order of their...
With the incessant growth of Web services on the Internet, designing effective Web service recommendation technologies based on Quality of Service (QoS) is becoming more and more important. Neighborhood-based Collaborative Filtering has been widely used for Web service recommendation, in which similarity measurement and QoS prediction are two key steps. However, traditional similarity models and QoS...
Since the emergence of Web services and the diversity of user's devices, an emerging need for adapted web services appeared. In fact, users aim to find web services meeting their requests, contexts and desired QoS. In order to achieve this goal, we propose in this paper a framework to find and select adaptable web services. Our framework is named QoS-ASF and it is based on a multi-agent system.
Although several approaches have been proposed towards self-adaptation of Web services, most of them work in isolation and few of them deal with cross-layer and trust issues. Indeed, the complex layered nature of service-based systems frequently leads to service failure and conflicting adaptation. To tackle this problem, we propose an ontology-based categorization of service behavior across all the...
This paper proposes a novel context-aware cloud service selection model based on the comparison and aggregation of subjective assessment extracted from cloud user feedback and objective assessment from quantitative performance testing. In this model, objective assessment provided by some professional testing parties is used as a benchmark to filter out potentially biased subjective assessment from...
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...
Telemedicine depends on Information and Communication Technology (ICT) to support remote treatment of patients. This dependency requires the telemedicine system design to be resilient for ICT performance degradation or subsystem failures. Nevertheless, using telemedicine systems create a dependency between medical and technological concerns. We propose a layering technique that links medical and technological...
Heterogeneity of future networks requires the use of extensible models to understand the Security and QoS tradeoff. We believe that a good starting point is to analyze the Security and QoS tradeoff from a parametric point of view and, for this reason, in a previous paper, we defined the Parametric Relationship Model (PRM) to define relationships between Security and QoS parameters. In this paper,...
In order to evaluate the efficacy of new research approaches as well as existing systems for management of end user service sessions, it is necessary to set up controlled sessions in a realistic, measurable, and repeatable manner. While service delivery clients support automation of end user sessions and expose mechanisms for retrieval of end user service experience and context, there is no single...
The era of the Internet of Things brings complexity and deployment costs in smart cities, particularly in Wireless Sensor Networks (WSNs). Utilities such as gas or water providers are keen on delegating the management of the communications to specialized firms, namely WSN Operators, that will share the WSN resource among their various clients. WSN operators will use a functional architecture to manage...
Current approaches to Quality of Service (QoS) monitoring using Service Level Agreements (SLAs) fall short of appreciating the many possible causes of breaching these digital contracts. These approaches are mainly concerned with the enforcement of these contracts without paying attention to what aspects of the service oriented environment the service provider has no control over and which have direct...
Contemporary software systems are becoming increasingly large, heterogeneous, and decentralised. They operate in dynamic environments and their architectures exhibit complex trade-offs across dimensions of goals, time, and interaction, which emerges internally from the systems and externally from their environment. This gives rise to the vision of self-aware architecture, where design decisions and...
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...
As a key enabler of Internet of things, cellular network based Machine-to-Machine (M2M) communications have been growing rapidly in recent years, being used in a wide range of services such as security, metering, health, remote control, tracking, and so on. A critical issue in M2M communications is the energy efficiency as typically the machine devices are powered by batteries of low capacity and...
With the rapid growth of population of service-oriented architecture (SOA), services are playing an important role in software development process. One major issue we should consider about Web services is to dig out the one with the best QoS value among all functionally-equivalent candidates. However, since there are a great number of missing QoS values in real world invocation records, we can hardly...
The composition of services in the web of objects poses important challenges concerning resources limitation, adaptability, performance and scalability. In this paper, we focus on the optimization of service selection as the key operation in dynamic service composition by using multi-agent architecture that achieves an online generation and rescheduling of the optimal services execution workflow by...
Quality of Experience (QoE) is important from both a user perspective, since it assesses the quality a user actually experiences, and a network perspective, since it is important for a provider to dimension its network to support the necessary QoE. This paper presents some recent advances on the modeling and measurement of QoE with an emphasis on mobile networks. It also identifies key challenges...
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