Operating Systems provide services that are accessed by processes via mechanisms that involve a ring transition to transfer control to the kernel where the required function is performed. This has one significant drawback that every service call involves an overhead of a context switch where processor state is saved and a protection domain transfer is performed. However, as we discovered, it is...

With the advancement of mobile technologies, numerous web service providers begin to extend their web services to the mobile context. Thus, the mechanism about users’ mobile service adoption behavior under the context of web – mobile service transition attracts both practitioners and researchers’ attention. In this study, regarding the consistency between the web services and its corresponding ...

Today, many traditional manufacturing firms are focusing on their service operations, which are often seen as a better source of revenue than the first-time installations. Information and communications technology (ICT) can accelerate this process by offering efficient ways to deliver services to the customers and by allowing companies to transform their traditional product strategies to servic...

Green computing is a hot issue that has received a great amount of interests in the past few years. Energy proportionality is a principal to ensure that energy consumption is proportional to the system workload. Energy proportional design can effectively improve energy efficiency of computing systems. In this paper, an energy proportional model is proposed based on queuing theory and service di...

IPv6 is a new version of the internetworking protocol designed to address the scalability and service shortcomings of the current standard, IPv4. Unfortunately, IPv4 and IPv6 are not directly compatible, so programs and systems designed to one standard can not communicate with those designed to the other. IPv4 systems, however, are ubiquitous and are not about to go away “over night” as the IPv...

The pre-eminent role played by software composition, and more particularly service composition, in modern software development, together with the complexity of workflow languages such as WS-BPEL have made composite service testing a topical issue. In this article we contribute to this issue with an automatic testing approach for WSBPEL orchestrations. Compared to related work, we support WS-BPE...

Today there are many techniques for web service compositions. Evaluation of quality parameters has great impact on evaluation of final product. BPEL is one of those techniques that several researches have been done on its evaluation. However, there are few researches on evaluation of QoS in eflow. This research tries to evaluate performance and reliability of eflow and BPEL through mapping them...

Using cloud services from mobile devices has become a growing trend because of its mobility and convenience. However, mobile devices join and leave cloud services more frequently than traditional computers, which causes energy inefficiency in a cloud data center. Waste, in the form of energy and cooling requirements, particularly occurs when a mobile device disconnects from a service, but the c...

BACKGROUND Although young people's transition from Child and Adolescent Mental Health Services (CAMHS) to Adult Mental Health Services (AMHS) in England is a significant health issue for service users, commissioners and providers, there is little evidence available to guide service development. The TRACK study aims to identify factors which facilitate or impede effective transition from CAHMS t...

Abstract: The Open Vehicle Routing Problem (OVRP) is one of the most important extensions of the vehicle routing problem (VRP) that has many applications in industrial and service. In the VRP, a set of customers with a specified demand of goods are given and a depot where a fleet of identical capacitated vehicles is located. We are also given the ‘‘traveling costs’’ between the depot and all th...