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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...
In this paper, we introduce a novel concept called collective skyline to deal with the problem of multiple users preferences. We then conduct a set of experiments that demonstrate the effectiveness of the introduced concept
Business transaction recovery is the fundamental approach of handling exceptions during execution as well as ensuring transaction features. In this paper context is applied to recovery of the web service business transaction and exceptions are classified into four categories: network exception, physical exception, service exception and user exception. Based on the classifications we define different...
This research summary outlines results achieved by Hamburg University during its participation in the EU NoE “S-Cube” focusing on process instance migration. It includes corresponding results in the context of dynamic and mobile environments (as, e.g., provided by mobile web services, NFC-aware process execution, future-context-aware applications or interactive workflows) and focuses on the management...
The development of context-aware applications has been the subject of many research works in ubiquitous computing. As the modern human is getting more and more mobile, carrying an ever increasing amount of computational power around and having access to online services, the need for personalized and adaptive information services is rapidly increasing. Thus, the field of context-aware services has...
Growing number of services need efficiently locating the desired web services. The similarity metric plays an important role in service search. However, most solutions only exploit information available in the descriptions of services and employ a single similarity metric. We observe that under different contexts the descriptions of services vary in their level of semantic ambiguity. It is hardly...
Service Oriented Architectures (SOA) with all technologies especially web services provide a successful model for structuring complex distributed software systems, as they reduce the cost of ownership and easiness of the creation of new applications by composing existing services. However, the developments of service-oriented applications require many external manual tasks and prevailing infrastructure...
We first sketch a prototype implementation of a battlefield command and control system that maintains shared situation awareness among units. We then analyze the conditions for coordination among units. Common knowledge is critical here and is achieved in the prototype by an arrangement with the formal structure suggested by one account of the notion of theory of mind in psychology. Common knowledge...
Pervasive applications promote a seamless integration of computer artifacts with our daily an business lives. However, they threaten privacy in two ways. Firstly, adaptation to a user's context necessitates a large collection of data. Secondly, context should be addressed when granting users access to information. This paper handles privacy management as an access control problem and argues that privacy...
Web services choreography describes the global model of service interactions among a set of participants. In order to achieve a common business goal, the protocols for interactions must be correct. Experiences show that it is difficult to check choreography manually, even it is not very complex. A scenario describes a sequence of interactions among the collaborative participants, that is useful for...
Web services are the element based in SOA (i.e., Service Oriented Architecture) applications that are commonly used in software systems. However the validation problem on quality of web services via testing has to be improved. This paper presents two tools for conformance testing of web services. One tool for unit testing that is implemented by an on-line approach. This tool can be used to test a...
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