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This paper made an exposition of the mobile search servicing system's demand, architecture, main functions of components according to a case for searching a place of entertainment of a city. It specially elaborated on how to use mobile context and policy management to render web services for mobile web service middleware.
In peer-to-peer (P2P) grids, peers act both as providers and consumers of the services offered in the system. In these systems, fair and efficient match of service request and service provision can be attained by using simple reciprocation-based mechanisms. Under contention, a peer p gives priority to serve the requests of the peers that have the largest difference between the amount of service provided...
This paper describes a middleware intended to support the development of mashup applications in mobile and ubiquitous learning environments. It is based on a framework that integrates different contextual information (e.g. geographic location, profile, history) and services (from e-learning platforms or other learning tools). The integration of the services into the middleware is carried out through...
Our research targets collaborative environments with focus on mobility of application. As mobile and wireless technology advances people are no longer bound to their offices. Sharing context information thus becomes a vital part of collaborative environments. However, challenges such as heterogeneous devices, connectivity, and bandwidth arise due to the dynamic nature of distributed, mobile teams...
We present a novel context acquisition and management middleware for mobile phones based on Qt (C++ based cross-plattform API) for S60 called mSense. In our middleware, sensor nodes encapsulate platform level APIs for seamlessly accessing hardware sensors, simulated sensors or web services. Aggregators (channels) combine information from other nodes to generate new knowledge. For example, GPS, accelerometer...
Modern Smartphones are the fastest growing computing platforms capable of consuming Web services. However, due to their form factor these mobile computing devices face many challenges and constrains when engaging service providers. How to overcome these challenges and how to link smartphones to the service cloud is one of the key issues that will have a major impact on the further growth of the software-as-a-service...
Negotiation of service level agreements (SLAs) is very important for maintaining quality of service (QoS) of composite Web services-based business processes. The process of negotiation involves specification of negotiation parameters, exchanging offers to conduct the actual negotiation process, and then finally generating the formal SLA if the negotiating parties come to a consensus. We propose a...
Nowadays, there is an increasing need for deploying Web services into embedded devices in pervasive computing environments. However, a number of problems arise for running pervasive web services, such as service not being accessible due to devices being located behind firewalls or NATs and therefore devices cannot offer services dynamically, and mobility problems as devices might change their location...
As more and more multi-tier services are developed from commercial components or heterogeneous middleware without the source code available, both developers and administrators need a precise request tracing tool to help understand and debug performance problems of large concurrent services of black boxes. Previous work fails to resolve this issue in several ways: they either accept the imprecision...
Context-awareness has become a desired key feature of today's mobile systems, yet, its realization still remains a challenge. On the one hand, mobile computing provides great potential for adaptations based on sensed contextual information. On the other hand, the lack of dependability in mobile networks hampers an efficient provision of this information to requesting clients. In this paper we present...
Current information service systems are built to serve all users, independent of the special needs of any individual user in different situations. Personalized information service aims at improving the retrieval process by taking into account the particular interests of individual users. However, not all user preferences are relevant in all situations, and they should be understood in context with...
Recent advances in wireless networks and mobile devices have brought about new scenes for the provision of services to end-users. Besides traditional services, new ones may be provided that transparently adjust and adapt to the user context. The user would have more choice and flexibility if, besides using the services, he could also compose his own services in an ad-hoc way. This paper presents iCas,...
We present the SynCFr framework (synchronization collaboration framework) supporting the management of composite applications and the synchronization of heterogeneous applications and services cooperating within a shared context. SynCFr supports the management of services and applications based on Web APIs, REST interfaces and WSDL/SOAP interfaces. The key element of SynCFr is the cross-application...
Service oriented middleware (SOM) is getting key support to enable service oriented architecture deployment in next generation pervasive networking - e.g., Beyond 3rd Generation (B3G). This paper proposes a reference model for architecting SOM solutions over B3G network.
The increase of mobile and interconnected devices demands for equally ubiquitous and mobile applications. Due to the heterogeneity of devices, applications have to adapt themselves to the environment they are executed in. This requires context management in the environment and context-sensitivity of the application. In this paper, we present a generic context service with a novel generic context model...
Recent advances in pervasive computing and service-oriented computing have led to a desire to better support user-oriented tasks. Task computing is a new paradigm that tries to provide computational support for humans in terms of their tasks that the human is involved in, which has become a driving force in realizing the vision of pervasive computing. One of the key challenges of task computing paradigm...
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