Service Selection

Powerful computers and affordable digital media appliances result in a rapid growth of possibilities in the field of multimedia applications. There has been a significant increase in creation and use of multimedia content. Nowadays everybody can be treated as a potential creator and user of multimedia content. In order to deliver multimedia services to end-users, many parties are integrated and a series of Web services is accessed. A Web service in the composition can become unreachable by a number of circumstances, which requires run-time actions to replace it by another compatible Web service. A Web service can also perform less well than guaranteed, which also requires action in order to fulfill QoS requirements. To answer these requirements, we designed a broker middleware offering dynamic selection and composition of Multimedia Content Delivery services and automatic load balancing of these services over the available application servers. Since users want fast and reliable conn...

There is evidence that the notion of innovation, well established in the manufacturing sector, cannot simply be transposed to the service sector. This article deals critically with existing measurement concepts derived from manufacturing, and introduces a new typology with a view to obtaining a better understanding of innovation in services. Selected results from the German innovation survey are analysed in order to support the conceptual findings and to identify potential improvements. Special attention is directed towards the inclusion of knowledge-intensive business services that are of particular importance for innovation processes.

NHS Stop Smoking Services in the UK provide cost effective smoking cessation interventions, but approximately 75% of smokers who are abstinent at 4 weeks relapse to smoking by 12 months. This study aimed to explore health professionals' understanding of relapse prevention interventions (RPIs), the feasibility of offering such support and whether and how these are currently used in UK NHS Stop Smoking Services. Sixteen health professionals working in UK NHS Stop Smoking Services, selected from those attending a national conference were interviewed and Framework Analysis was used to identify recurrent key themes and concepts in their perceptions and experiences of providing relapse prevention interventions (RPIs). Interviewees had diverse perceptions of relapse prevention as a concept. Whilst relapse prevention was largely seen as support to prevent abstinent smokers from relapsing to smoking, some interviewees stated that RPIs were being delivered to lapsed or relapsed smokers. Current provision of RPIs was most commonly described as behavioural counselling being offered predominantly after completed cessation treatment, often in the format of 'rolling groups' which the client was encouraged to attend. Commonly identified barriers to the introduction of RPIs were funding and government targets focussed on short term cessation, smokers' low uptake of offered RPIs and an uncertain evidence base for their effectiveness. Interviewees were positive about the potential use of pharmacotherapy for relapse prevention, but were negative about the possibility of introducing proactive telephone counselling for this purpose. There is currently no shared understanding of the concept of relapse prevention amongst this sample of health professionals working in UK NHS Stop Smoking Services. For RPIs to be systematically delivered via these services, a commonly-held, widely-accepted and understood definition of relapse prevention would be needed. Other barriers towards introducing RPIs, such as their weak evidence and the short term cessation-focussed targets against which UK stop smoking services are measured, would also need addressing and interventions which are acceptable to abstinent smokers would need to be developed.

The diffusion of the Internet fosters the development and provisioning of large amounts of information-intensive services. Methods and techniques such as heuristics, policy-based approaches, reputation- and trust-based selection techniques, multi-criteria decision analysis, UDDI-extensions, and ontology-based preference modeling approaches have been developed to facilitate the description, discovery, composition, and consumption of these services. Still, consumers face difficulties in selecting the services

Provision of services across institutional boundaries has become an active research area. Many such services encode access to computational and data resources (comprising single machines to computational clusters). Such services can also be informational, and integrate different resources within an institution. Consequently, we envision a service rich environment in the future, where service consumers can intelligently decide between which services to select. If interaction between service providers/users is automated, it is ...

Today networks offer few communication services provided by their associated protocols for communicating on the network. In the future, it is expected that networks will offer a large number of different communication services. With so many services available, determining which service to select and use will become much more difficult. Here we propose a description schema including an ontology for describing and selecting communication services. For service selection a human decision making process called Analytic Hierarchy Process (AHP) is utilized which is specially adapted and extended for automatic processing.

With the visibility that cloud computing has been acquiring, it is observed that
the provision of computational resources as services is growing increasingly, leading to
a large number of services being offered. These services have heterogeneous managerial
and technical specifications, so that organizations wishing to use such services need
mechanisms to assist in the decision making process to choose one that best suits their
needs. This paper addresses the issue of selection of cloud services based on the analysis
and use of methods, models and algorithms for selection which meet multiple criteria. We
present an unified approach for specifying user objectives, capturing properties of available
services, and applying a selection method. Our approach is evaluated by combining two
multi-criteria methods for selecting real cloud computing services.

Cloud computing has emerged as a popular paradigm that offers computing resources as scalable of cloud service provider (CSP) and efforts towards intelligent cloud service selection. Cloud brokers as an additional layer to facilitate cloud service selection and services management task for cloud consumer. Although the issue of data privacy can be solved by database encryption techniques. In outsource database model, the cloud broker sever provider query services to user on behalf of the data owner. The user’s data are shared and maintained with it concerns of security vulnerability for all the services. this paper survey on how brokerage system provide authenticated CSP’s profile to cloud broker and broker to cloud client

This paper proposes an ontology-driven discovering model for the geographical information services to improve their recall ratio and precision ratio. This model uses the geographical information service ontology. In this paper, first we study the multilevel matching arithmetic of geographical information services. This arithmetic is used for filtering and matching the services in the service register center according to the

Trust management is becoming crucial in open systems because they may contain malicious and untrustworthy service providers. Trust management in multi-agent systems (used to model open systems) has gained a huge amount of attention from researchers in recent years. In our previous work, we proposed a generic agent trust management framework, called ScubAA, which is based on the theory of Human Plausible Reasoning. ScubAA first recommends to the trustor (e.g. a user) a personalized ranked list of the most trusted trustees (e.g. service providers), within the context of the trustor's request, and then forwards the request to those trusted trustees only. In this article, we are particularly interested in comparing, from a theoretical perspective, ScubAA with four other trust management systems that we selected from the vast literature on trust management. This comparison highlights significant factors that agent trust management systems utilize in their trust evaluation process. It also shows that ScubAA is able to consider more trust evidences towards a more accurate value of trust. Indeed, ScubAA introduces a single unified framework that considers various important aspects of trust management, such as the truster’s feedback, history of trustor’s interactions, context of the trustor's request, third-party references from trustors as well as from trustees, and the structure of the society of trustor and trustee agents.

Cloud Computing is considered nowadays an attractive solution to serve the Big Data storage, processing, and analytics needs. Given the high complexity of Big Data workflows and their contingent requirements, a single cloud provider might not be able alone to satisfy these needs. A multitude of cloud providers that offer myriad of cloud services and resources can be selected. However, such selection is not straightforward since it has to deal with the scaling of Big Data requirements, and the dynamic cloud resources fluctuation. This work proposes a novel cloud service selection approach which evaluates Big Data requirements, matches them in real time to most suitable cloud services, after which suggests the best matching services satisfying various Big Data processing requests. Our proposed selection scheme is performed throughout three phases: 1) capture Big Data workflow requirements using a Big Data task profile and map these to a set of QoS attributes, and prioritize cloud service providers (CSPs) that best fulfil these requirements, 2) rely on the pool of selected providers by phase 1 to then choose the suitable cloud services from a single provider to satisfy the Big Data task requirements, and 3) implement multiple providers selection to better satisfy requirements of Big Data workflow composed of multiples tasks. To cope with the multi-criteria selection problem, we extended the Analytic Hierarchy Process (AHP) to better provide more accurate rankings. We develop a set of experimental scenarios to evaluate our 3-phase selection schemes while verifying key properties such as scalability and selection accuracy. We also compared our selection approach to well-known selection schemes in the literature. The obtained results demonstrate that our approach perform very well compared to the other approaches and efficiently select the most suitable cloud services that guarantee Big Data tasks and workflow QoS requirements.

The real-time database service selection depends typically to the system stability in order to handle the time-constrained transactions within their deadline. However, applying the real-time database system in the mobile ad hoc networks requires considering the mobile nodes limited capacities. In this paper, we propose cross-layer service selection which combines performance metrics measured in the real-time database system to those used by the routing protocol in order to make the best selection decision. It ensures both timeliness and energy efficiency by avoiding low-power and busy service provider node. A multicast packet is used in order to reduce the transmission cost and network load when sending the same packet to multiple service providers. In this paper, we evaluate the performance of our proposed protocol. Simulation results, using the Network Simulator NS2, improve that the protocol decreases the deadline miss ratio of packets, increases the service availability and reduces the service response time.

Service selection is a kind of planning approach that evaluates and selects from multiple services to form a composite plan. In service selection, we found one additional issue that has not been investigated yet namely time constraints consistency among composite services. This issue is significant because there are potential time constraints involved that might cause inconsistency between selected services although they can offer aggregated QoS that satisfy global requirements. Furthermore, there might be some unintended waiting time to be considered in the QoS aggregation. Thus, this paper contributes to the analysis on the problem caused by the time constraints and proposes general selection approach to tackle these issues. The approach comprises two major functionalities; (i)exploration of the process model based on patterns, (ii)evaluation of candidates based on time constraints and objective functions.

Web services will soon handle users' private information. They'll need to provide privacy guarantees to prevent this delicate information from ending up in the wrong hands. More generally, Web services will need to reason about their users' policies that specify who can access private information and under what conditions. These requirements are even more stringent for semantic Web services that exploit the semantic Web to automate their discovery and interaction because they must autonomously decide what information to ...

Web services are becoming a common and convenient means of doing business over the Internet. More-and-more web services are kept on arriving over the Internet, offering the same set of services to the end users. The availability of similar web services increases the complexity of discovery as well as the selection process of web services. The traditional way of discovery of web service involves keyword based searching followed by manual selection. The keyword based search is not efficient. In this paper, we have used an improved mechanism for web service selection based on biorhythm, age, time of attendance and origin society of the user. As interest in website owners arises not only to keep their customers but also increase them to get more income. By att racting customers more than any other competitors the chance to be the winner in this competition arises. Improving in business has number of rules which sellers should obey. The business rules such as negotiation, body language, time management, and selling strategy have been completely discussed in M.B.A And D.B.A courses. At the same time, for websites there is not that much information. In this study we are going to introduce new rules for websites to act more attractive. Company managers before any negot iation, should choose the best negotiator. This duty has different step. Important step is that the negotiators should be studied different courses related to strategy of negotiation. Second step is to realize biorhythm, not only for the company speakers but also for the other side as well. Now a day's websites are an important negotiator for any companies.

The increasing availability of massive information on the Web causes the need for information aggregation by filtering and ranking according to user’s goals. In the last years both industrial and academic researchers have investigated the way in which quality of services can be described, matched, composed and monitored for service selection and composition. However, very few of them have considered

Service oriented computing is becoming the standard paradigm to support the creation of applications composed of ser- vices selected from a registry. Nowadays, we are assisting to the proliferation of standardized approaches to describe such services, but there is the general agreement of distin- guishing between the general characteristics of services and the characteristics associated with service invocation. In many

Provision of services across institutional boundaries has become an active research area. Many such services encode access to computational and data resources (comprising single machines to computational clusters). Such services can also be informational, and integrate different resources within an institution. Consequently, we envision a service rich environment in the future, where service consumers can intelligently decide between which services to select. If interaction between service providers/users is automated, it is ...