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With network coding, data flows from the source to the destinations may be jointly coded in some intermediate nodes to achieve the maximum network capacity. There is scarcely any theory to systematically model and evaluate the loss of network coding. Without such a theory, the analysis of network coding under various settings is far from practical. To fill the vacancy, we introduce a loss model into...
In recent years most Internet Service Providers (ISPs) have come across one of the important problems. That is, how to manage automatic adjustment of the bandwidth in the field of Virtual Private Networks (VPNs).One solution, is a model called Autonomic Service Architecture (ASA), which can manage the bandwidth allocation for individual customers. Nevertheless, this model has two main drawbacks. One...
Reputation-based methods have been widely proposed and practised to foster online trust relationships. Previous works introduced the concept of reputation utility that bridges reputation and trust to reveal the reciprocal transformation mechanism between them. In this paper, an improved model, concerning the popularity of online entities, is constructed. Based on the model, further exploration on...
This paper provides an overview of online student feedback systems in tertiary institutions. It is then introduce a student feedback online system (SuFO) developed and used in a public university in Malaysia. Subsequently, this paper describes how data from SuFO is used to observe the quality of teaching between experience and inexperience lecturer. The evaluation is based on students' response in...
The increasing demand for data and multimedia services, as well as the ubiquitous nature of the current generation of mobile devices have resulted in continuous network upgrades to support an ever-increasing number of users. However, given that wireless communication systems operate on radiofrequency waves, the health effects of electromagnetic (EM) emission from these systems are increasingly becoming...
Data Distribution Service (DDS) is a dependable communication middleware architecture to provide real-time interoperable data exchanges for airborne software. It is important to efficiently detect message races for debugging DDS programs, because it is the most serious type of software faults and the presence of message races in the programs has not been reported. This paper presents fault cases how...
The paper proposes a method that helps clients to select a web service among several ones with the same functionality based on their quality of service properties (QoS). It provides a mechanism for integrated QoS assessment of web services taking into account all measured QoS properties of interest. The method estimates the strength of the mutual dependency of the QoS properties based on the data...
The energy consumption of cloud servers has dramatically increased. In order to meet the growing demands of users and reduce the skyrocketing cost of electricity, it is critical to have performance guaranteed and cost-effective job schedulers for clouds. In recent years, there has been a growing body of research which focus on improving resource utilization to improve energy efficiency, system throughput...
The complexity of software systems has raised many challenges in the way they will be installed, configured, deployed and merged in the near future. The vision of a self-protecting system with the capability of defending itself as a whole as well as planning how to mitigate the attack given different scenarios and requirements is one of the most promising research directions to solve these challenges...
Aiming at policy conflicts when administrators deploy QOS policies, this paper proposed a QOS policy conflict detection and resolution mechanism. It includes QOS policy conflict detection technology based on policy and QOS policy conflict resolution technology based on policy re-construction, which can detect and resolute QOS policy conflicts both in the same type of behavior and in different types...
Web services are the key technologies for the web applications developed using Service Oriented Architecture (SOA). There are many challenges involved in implementing web services. Some of them are web service selection and discovery which involves matchmaking and finding the most suitable web service from a large collection of functionally-equivalent web services. In this paper a fuzzy-based approach...
In the web service management Quality of service (QoS) has become an important issue due to the vast number of services that provide the same functionality but with different features. Selecting QoS based services for web services is considered to be global optimization problem. There are several non-functional factors that integrated into Quality of service in web services such as execution cost,...
This paper presents the implementation details of multi-format streaming server. Supported protocols are HLS (HTTP live streaming) protocol and MPEG-DASH (Moving Pictures Experts Group — Dynamic Adaptive Streaming over HTTP) protocol, which allow the server to adapt to different network conditions and client requirements in order to achieve the best possible QoE (Quality of Experience) with low latency...
Currently, Advanced Driver Assistance Systems (ADAS) require high bandwidth of in-vehicle application. Ethernet has attracted attention for using in-vehicle networks because it provides 100Mbit/s bandwidth. However the legacy Ethernet cannot guarantee Quality of Service (QoS) for in-vehicle networks because priority is not provide. IEEE802.1Q (802.1Q) and IEEE802.1AVB (AVB) of the IEEE802 Ethernet...
Recently, cognitive radio technology has been a lot of attention to improve bandwidth efficiency. In this paper, we propose an adaptive bandwidth management scheme based on the mechanism design and negotiation theory. According to the user`s utility, QoS and trust value, the proposed scheme allocates total resources while dynamically controlling the selfish users. In addition, proposed scheme is able...
Virtualized systems such as public and private clouds are emerging as important new computing platforms with great potential to conveniently deliver computing across the Internet and efficiently utilize resources consolidated via virtualization. Resource management in virtualized systems remains a key challenge because of their intrinsically dynamic and complex nature, where the applications have...
Network virtualization techniques allow for the coexistence of many virtual networks hosted in a same substrate network. Virtual router migrations allow for resource consolidation with the consequence to reduce the power consumption in low traffic periods. Unfortunately virtual router migrations have the effect of degrading the Quality of Service during the downtime in which the router is not able...
With the rapid development of cloud computing technologies, there are increasing number of Web services deployed by service providers on cloud platforms. Invoking Web services is in the form of given orders, by which the end-user can process business and information in anytime and anyway. However, existing Web service compositions mainly focus on single Web services selection and neglect to consider...
The explosive growth of Internet Web services has intensified the study of Service-oriented Computing (SOC). The recommendation of a Web service has become extremely common. Current approaches utilize the Quality of Service (QoS), which is based on the performance of the Web service. However, acquiring average QoS values is impractical because these values are susceptible to the uncertain Internet...
As a result of recent trends in enhancing Service-Oriented Requirement Engineering (SORE) activities, a number of requirement specification methods have been proposed for fitting the reuse infrastructure in a Service-Oriented Architecture (SOA). The availability of different Requirement Engineering methods offers developers a range of options to choose from. However, most of existing research effort...
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