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Automated services composition is an active research area nowadays. The application of this technology to specific domains, as well as the use of basic Telecommunications services such as call or SMS, offers new challenges. This paper presents the main components of an architecture for automated composition for Environmental Management. The proposed architecture uses Natural Language processing and...
Despite 20 years of research, ubiquitous systems have yet to become truly ubiquitous. A key challenge is the design for volatility and evolution experienced when those systems are deployed in more than one environment as well as for a substantial time period. The work presented here describes a proposed federated System of Systems (SoS) engineering approach for creating ubiquitous systems based on...
In recent years, Service Oriented Architecture (SOA) has been increasingly adopted to develop applications in the context of Internet. To develop reliable SOA-based applications, an important issue is how to ensure the quality of Web services. In this paper, we propose a dynamic random testing (DRT) technique for Web services which is an improvement of the widely practiced random testing. We examine...
Services computing is becoming one of the most widely adopted software paradigms in today's network computing environment. Due to the rapid development of web services technology, there are growing number of web services applications distributed over the Internet. While the identification of web services that best meet the users' needs and preferences remains an unsolved problem, requirements, social...
The efficient cooperation of Web services is essential to applications of a Virtual Organization (VO). However, lots of challenges result from the diversity of services and the variability of business requirements. A novel approach to service cooperation based on Agile Services is proposed. The model of Agile Service is realized based on Tree Syntax. Aiming at mismatches of services existing in the...
In a largely scalable Web services-based environment, context-awareness is concerned with reasoning about the surrounding well-defined context and adapting the interpreted services accordingly (almost) on the server-side, and finally distributing the services to clients in a reliable way through trustworthy network protocols. Most of Web services-based context-aware applications are either partially...
Nowadays, location-based services are widely utilized, including identifying user locations, offering traffic status, providing point of interest (POI) information, and guiding routes. At present, users always make use of location-based services via smart phones, and can obtain information anywhere and anytime. However, users easily receive information in which they were not interested. This kind...
Accounting for quality correlations among web services when performing service composition is essential to obtain more accurate quality estimations of service combinations, thus providing users with better composite solutions. Yet, most current composition approaches fail to address such correlations by assuming independence between services regarding their quality values. In response, this paper...
Information diffusion has been studied between and within biosphere, microblogs, social networks, citation networks and other domains, where the network structure is present. These studies have turned to be useful for acquiring intrinsic knowledge for strategic decision making in related areas, for example, planning online campaigns in case of microblogs and blogosphere. In the context of data-centric...
With the development of service-oriented computing environments, QoS-aware service selection has been a more and more important research issue. In service composition environments, QoS attributes of atomic services are always aggregated for computing the QoS of the composite services, which has been reported in many previous studies. However, there are situations that some QoS attributes cannot be...
The formalization and manipulation of complex and not yet assessed rules by clinicians are critical for Decision Support Systems (DSSs) performance in supporting remote monitoring of chronic patients. Sometimes, structural anomalies, such as inconsistency and redundancy, can occur. This work presents a novel system, named Consistency Checker, aimed at verifying the reliability of condition-action...
With the increase of published Web services, it has become a great challenge to recommend service consumers the best services with regard to the quality of services (QoS). Collaborative filtering is often employed to predict the QoS of a specific service to a certain consumer. However, in existing collaborative filtering based service recommendation approaches, the context under which consumers submit...
In large enterprises, there are an abundance of IT assets which provide employees with the productivity tools necessary to do their jobs. There are also large numbers of applications and services for running the 'back office'. A challenge to all enterprises is cataloging these services, in order that organization can effectively put the services into business use, retire unused services or duplicate...
Mobile Applications are rapidly emerging as a convenient medium for using a variety of services. In ubiquitous environment, the challenge relies on developing applications that sense and react to environmental changes to provide a value-added user experience. This context awareness property improves application usability. Context information can be related to the environment, user but also to the...
Service contracts function as interfaces which bridge IT implementation, business modeling, and economical analysis among stakeholder. We report a review of recent research/practice(to be completed) with focus on contract content and contract management. Dimensions of { Quality of data(QoD), Quality of service(QoS), Legal issue, Context, Business term } and { Description of contract, Monitor/Control,...
Today, information systems rely largely on web services and XML as their payloads. Every information system also depends on checking and preserving integrity constraints. In the world of conceptual modeling, they can be expressed using Object Constraint Language (OCL) expressions over class diagrams. However, the expressions defined in the conceptual model of the system must be rewritten to the form...
Most human centric business activities, like the handling of an insurance claim or the design of an IT solution, do not follow a formal process model word-by-word. While there are often underlying processes in place, the real business operation typically encompasses a wider scope of actions. It includes unstructured segments of human activities, additional documents and interactions, the integration...
As more web services are offered on the Web, it is becoming increasingly difficult for users to manage and search for online content, using only flat keyword searching. Users often forget how they tagged their data but may remember generic information such as the location they were in when they took the picture. We describe a framework for personalized context-aware search of ontology-based tagged...
Reputation is useful for establishing trust between Web service (WS) providers and WS consumers. In the context of WS composition, a challenging issue of reputation management is to propagate a user's impression of a composite WS (i.e., the user's feedback rating) to its component WSs. In this paper, we propose a Shapley value based approach which can achieve fair impression propagation, that is,...
QoS-aware service composition intends to integrate services from different providers and maximize the global QoS in order to increase the user's satisfaction degree while subjecting to dynamic context constraints. Current composition approaches only focus on optimizing a single process to maximize the satisfaction degree for one party. When multiple processes are performed concurrently by their selfish...
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