Problem statement: Language Lab plays crucial role in learning foreign language. With its capability to create environment of connecting students with students, connecting student with teacher and giving the impactful learning resources, some of institution are dare to invest of expensive system. Hence, some of them keep searching for more efficient way to learning language. In this study, base...

Performing complex tasks over the Web has become an integral part of our everyday life. The advent of mobile services will add to the broad range of existing services offered on the Web and provide additional features like location-based information. To take full advantage of complex service offerings, even on limited client devices, and to handle the growing variety of applications, powerful c...

Providing an easy-to-use service framework for mobile context-aware applications is a real challenge. This paper describes how context information in mobile 3G networks can be unlocked via web services. We describe a service framework that builds on top of these web services, to enable the rapid development of applications that are aware of the context of the end-user, are able to reason with c...

In present times, quite a large number of network applications have been implemented as Web services to take advantage of World Wide Web, the most popular and common platform in the Internet. Although most modern mobile devices are able to connect to the Internet and hence capable of accessing Web services as stationary clients do, they often suffer from performance degradation because of the u...

Web services are an emerging technology that provides a flexible platform for web interaction. We evaluate Web service performance of handheld resource-constrained clients using different wireless technologies. Due to the usage of XML, message sizes in Web services are larger than in traditional web technologies and therefore, compression of Web service messages is attractive; as our experiment...

This paper presents the implementation of the CU VOCAL Web service, one of the first Chinese text-to-speech synthesis Web services. The CU VOCAL Web service can be easily integrated with other Web services to develop innovative Web-mediated applications. We have developed a novel automatic voice alert system in the stocks domain by integrating CU VOCAL and several other Web services. This syste...

Many providers offer Web APIs that expose their services to an ever increasing number of mobile and desktop applications. However, all interactions have to be explicitly programmed by humans. Automated composition of those Web APIs could make it considerably easier to integrate different services from different providers. In this paper, we therefore present an automated Web API composition meth...

A web-based dispatching system for autonomous mobile service robots is presented. The system is composed of an extensible number of physical and software components. They represent and control objects like robots, doors, cameras and elevators or software components like a job scheduler and a database manager. Components communicate via radio link and Ethernet. Autonomously operating components ...