Context-Aware Service Composition in Pervasive Computing Environments

International audienceA major challenge in pervasive computing environments is to provide users with complex, context-sensitive applications, dynamically composed from networked services. In this paper, we present an approach to the dynamic, context-aware composition of services to perform user tasks, i.e., software applications abstractly described on the user's handheld device. Both networked services and user tasks aremodeled as semanticWeb services in OWL-S extended with context information. The distinctive feature of our solution is the ability to compose Web services that expose complex behaviors (conversations) to realize a user task that itself has a complex behavior. Furthermore, the context-related requirements of the task are met by aggregating the context-sensitive behaviors of the individual services

Learning networks and communication skills

The project work presented in this paper is funded by the Joint Information Systems Committee (JISC) January‐December 1999. Our task has been to identify effective communicative practices for different technologies, in relation to the contexts in which they occur, and to feed back information about such practices to the educational community in a context‐sensitive way. The technologies at issue are: video conferencing (one‐to‐one, one‐to‐many, many‐to‐many); text‐based communication (email, bulletin boards, conferencing,) and audio conferencing (telephone tutoring, shared workspace plus audio link). The teaching and learning sites that agreed to take part in this research project provide courses to a variety of learners ‐ undergraduate, postgraduate, professional, full‐ and part‐time — in a spread of subject disciplines. The breadth and range of learning environments represented should maximize the chances of teachers in further and higher education recognizing issues and circumstances that are similar to their own and provide a rich comparative framework. The lecturers from the various teaching sites are regarded as collaborators in this research, identifying their own issues and learning needs, and providing feedback to authenticate the interpretative process. This study approach bridges the practice‐theory gap. We have completed the field work and are midway through analysing and interpreting the data in collaboration with teachers and students involved in the study. This will lead to the production of a flexible resource for individual lecturing staff which can also underpin staff development courses in good practice within networked learning environments. Further details and progress updates can be gleaned from our project web site at http://www.gla.ac.uk/services/tls/ JISC/index.html

Credibility of Health Information and Digital Media: New Perspectives and Implications for Youth

Part of the Volume on Digital Media, Youth, and Credibility. This chapter considers the role of Web technologies on the availability and consumption of health information. It argues that young people are largely unfamiliar with trusted health sources online, making credibility particularly germane when considering this type of information. The author suggests that networked digital media allow for humans and technologies act as "apomediaries" that can be used to steer consumers to high quality health information, thereby empowering health information seekers of all ages

Peripatetic electronic teachers in higher education

This paper explores the idea of information and communications technology providing a medium enabling higher education teachers to act as freelance agents. The notion of a ‘Peripatetic Electronic Teacher’ (PET) is introduced to encapsulate this idea. PETs would exist as multiple telepresences (pedagogical, professional, managerial and commercial) in PET‐worlds; global networked environments which support advanced multimedia features. The central defining rationale of a pedagogical presence is described in detail and some implications for the adoption of the PET‐world paradigm are discussed. The ideas described in this paper were developed by the author during a recently completed Short‐Term British Telecom Research Fellowship, based at the BT Adastral Park

Architectural implications for context adaptive smart spaces

Buildings and spaces are complex entities containing complex social structures and interactions. A smart space is a composite of the users that inhabit it, the IT infrastructure that supports it, and the sensors and appliances that service it. Rather than separating the IT from the buildings and from the appliances that inhabit them and treating them as separate systems, pervasive computing combines them and allows them to interact. We outline a reactive context architecture that supports this vision of integrated smart spaces and explore some implications for building large-scale pervasive systems