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Quality of Services (QoS) is an important criterion to evaluate Web services recommendation system. Due to factors including various network conditions, QoS values are dynamic and time-varying. In reality, the data is too spare to fit in with traditional time series forecasting model (e.g., ARIMA). To address this crucial challenge, this paper proposes a novel time-aware and sparsity-tolerant QoS...
Architecting service-oriented systems is a complex design activity. It involves making trade-offs among a number of interdependent design decisions, which are drawn from a range of concerns by various software stakeholders. In order to achieve effective and efficient SOC design we believe a careful study of architectural styles that can form the reference architecture is important. Hence, this paper...
QoS prediction for Web services is a hot research problem in the field of services computing. As one of the most important methods for QoS prediction, Collaborative Filtering (CF) makes prediction based on the historical QoS data contributed by similar users and services. The key issue in this process is to detect the unreliable data offered by untrustworthy users, which has attracted limited attentions...
Many believe that Cloud will reshape the entire ICT industry as a revolution. In this paper, we aim to pinpoint the challenges and issues of Cloud computing. We first discuss two related computing paradigms - Service-Oriented Computing and Grid computing, and their relationships with Cloud computing. We then identify several challenges from the Cloud computing adoption perspective. Last, we will highlight...
In this paper, we propose an Internet public Web service matching approach that paves the way for (semi-)automatic service mashup. We first provide the overview of the solution, which requires a detailed review of two fundamental models - schema/graph matching and semantic space. Based on the conceptual model and the literature study, the complete service matching approach is then provided with four...
In this tutorial, we will review contemporary research that aims to 'align' the Web services with the modern Web in two significant aspects - Web services architectural styles and Web services discovery mechanism. Based on a comprehensive survey, we will identify several critical open issues that need to be addressed when incorporating Web (2.0) techniques and philosophies into the Web services practice...
Component retrieval/discovery is a well-established research direction in Software Engineering. With the surge of Service-Oriented Architecture (SOA), service discovery has become increasingly crucial. However, the public UDDI Business Registry - the primary service discovery mechanism over the Internet - has been shut down permanently since 2006. Moreover, keyword-based service discovery is insufficient...
With the surge of Service-Oriented Architecture (SOA) and Web services, service discovery has become increasingly crucial. Public Web services that are available "on the Web" provide unlimited values for a great number of online service consumers and developers. However, the public UDDI Business Registry - the primary service discovery mechanism over the Internet - has been shut down permanently...
Web service selection is an essential element in service-oriented computing. How to wisely select appropriate Web services for the benefits of service consumers is a key issue in service discovery. In this paper, we approach QoS-based service selection using a decision making model - the analytic hierarchy process (AHP). In our solution, both subjective and objective criteria are supported by the...
This paper advances the notion of software in existing grid services as discussed in OGSA, which provides software middleware or wrappers for accessing hardware resources towards the notion that the resources provided can be hardware, software, or hybrid hardware/software. It also proposes an approach using the integration of grid service, semantic grid, and Web2.0 to overcome some of the limitations...
Digital ecosystems (DES) transcend the traditional rigorously defined collaborative environments from centralised or distributed or hybrid models into an open, flexible, domain cluster, demand-driven interactive environment. A digital ecosystem is new-networked architecture and collaborative environment that addresses the weakness of client-server, peer-to- peer and Web services. In this paper, we...
Web services mediation - the process of bridging disparate service requesters and providers - is of paramount importance. However, few existing open projects are directly working on service mediation. Although mediation has become an essential part of commercial enterprise service bus (ESB) products, they use proprietary solution, which cannot lead to a high level understanding of the mediation architecture...
The increasing proliferation of independent application service providers is making traditional IT infrastructure insufficient when dealing with new issues that appear in a dynamic outsourcing business model. Quality of service (QoS) gradually becomes an essential benchmark to differentiate diverse service providers during service selection process. In this paper, we argue service selection can be...
With the surge of SOA-based infrastructure and applications, increasingly end users and small-medium-enterprises directly participate in the service publish and discovery across the Internet. The recent shutdown of public UDDI exposes critical problems of existing Internet-based service discovery. Hence, public service discovery becomes a central SOA issue. In this paper, we present a light weight...
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