Using Ontology Research in Semantic Web Applications

In the light of improving the World Wide Web, researchers are working towards the Semantic Web. Ontologies and ontology-based applications are its basic ingredients. Several ontological environments, categorizations and methodologies can be found in the literature. This paper shows how we have investigated the state of the art in these areas in an ontology building process that is the basis for an application developed at the later stage in an events organisation domain

A Generic Communications Module for Cooperative 3D Visualization and Modelling over the Internet: the Collaborative API

Cooperative three-dimensional visualization and modeling applications allow a distributed group of users to work together with a model they share. To implement this kind of applications the underlying communications system must provide reliable and ordered multicast of users interactions. Due to the high complexity that characterizes the models, network bandwidth requirements have limited their use to intranets or in a few cases to very high-speed Internet connections. In this paper we present a communications module that solves this problem. The library exposed, which is called Collaborative API, supports the creation of very efficient cooperative 3D visualization and modeling applications by optimizing the use of the network resources. The Collaborative API, implements a new communications architecture: the dynamic client/server. The communications module presented in this paper is illustrated by two examples of applications that use it to provide cooperative 3D visualization over the Internet

Integration with Ontologies

One of today’s hottest IT topics is integration, as bringing together information from different sources and structures is not completely solved. The approach outlined here wants to illustrate how ontologies [Gr93] could help to support the integration process

Configuring service recovery planning with the commonKADS library

Publisher Copyright: © Springer-Verlag Berlin Heidelberg 1996.It has become clear that KBS development, if intended to meet existing industrial quality standards, will have to follow a well structured engineering approach. This, in turn, might increase the reliability of the product and reduce the development costs, thus increasing productivity. CommonKADS is a methodology for KBS development supported by a library of reusable modeling components. This methodology and its library can provide the means for the methodological approach required in the development of knowledge intensive systems. Service recovery planning is a knowledge intensive process whose aim is to drive safely an electrical network from a disturbance situation to its normal operating condition. Many types of knowledge are required in a service recovery planning application, and thus, we consider that the effort spent using a structured methodology for its design will be paid for by the identification of components and structured knowledge that can be reused in related applications. It is for this reason that we have attempted to model this real-world problem using the reusable components provided by the CommonKADS library. In this paper we present this modeling process and its results. We also present some conclusions with respect to the use of the C0mmonKADS library.Peer reviewe

Building and using an electrical network ontology for fault diagnosis

Nowadays reuse-based software development involves identifying both software and data components (objects, relations, etc.) reusable in different applications and/or domains. The KACTUS project set out to investigate the feasibility of knowledge reuse in complex technical systems and the role of ontologies to support it. This has been investigated by creating ontologies for particular domains and reusing them for different tasks or applications. One of the domains of interest in the project was the electrical network. In this paper we present our work on modelling a diagnosis application and on using the resulting ontology in the implementation of the system.Peer reviewe

Ontology for fault diagnosis in electrical networks

In a diagnosis system, the representation of the network is clearly necessary, and much of the knowledge used can be shared by other applications. This application domain therefore provides the basis for the development of a generalized ontology of the electrical network. This article presents an ontology to represent the electrical network from the point of view of diagnosis, i.e., an ontology of the elements of the network that are necessary for fault diagnosis.Peer reviewe

A new navigation paradigm for virtual reality: the guided visit through a virtual world

The three main navigation paradigms for virtual worlds, i.e., free navigation, automatic tours, and multiuser navigation show important limitations when dealing with guided visits that involve interactive cooperation among several users in 3D virtual worlds over the Internet. In this paper, we present our research into this issue and some important results. We propose a new navigation paradigm denominated guided visit through a virtual world, where the capacity of a user guiding several remote users through the virtual world is enriched with the capacity to dynamically interchange the role of guiding between the connected users. The user that acts as a guide moves freely through the virtual world, and his/her movements are reproduced by the browsers of the other guided users. We also present the architecture and the system we developed that implements this paradigm, as well as its integration in a working realworld application that demonstrates its use. 1