Catálogo de publicaciones - libros

We present new metrics and techniques which allow one to configure a metadata catalogue and objectively describe knowledge management ontologies. Per C.E. Shannon (1948), when describing information based systems, statistical measures are a necessity; yet very few ontology based standards mention quantifiable measures such as entropy, data encapsulation, complexity, efficiency, evolution, or redundancy. We hope to demonstrate how statistical information measures can be implemented for ontology-based knowledge management systems using our statistic, entropy, evolution, organization, sensitivity, and an interpretation of complexity.

The research and development efforts within the M-ADVANTAGE project described in this paper aim at increasing the competitiveness of Europe’s digital content industries by semantic-based services across the content value chain, including personalized delivery. Nowadays, user needs are addressed by costly solutions that require intensive human intervention. The described activities strive at filling the gap in automatic processing of multimedia by creating an intelligent infrastructure allowing considerable productivity gains. For achieving this goal, it is proposed to carry out a tightly integrated research and development activities also in terms of the blend of research, technology, content and user partners involved.

The research and development targets to build a service infrastructure for automated semantic discovery, extraction, summarization, labelling, composition, and personalized delivery of content from heterogeneous multimedia repositories. This will involve foundational research such as data models and ontologies required for merging multiple heterogeneous data types into an integral representation; component-level research for parts of the service infrastructure; as well as development of semantic-based productivity tools. Making use of established Semantic Web, multimedia description and other standards are anticipated to enable a broad uptake of M-ADVANTAGE’s open source and non proprietary technologies.

While the project’s research & technology partners include leading university centres and industry players (including SMEs), on the content side renowned private as well as public organisations are involved. They hold and provide access to all types of content such as audiovisual, stock image archives, news agency and other content, and strive to develop and market knowledge-based content services.

Embedded intelligence together with upcoming ICT solutions give new possibilities for more automated service process operation over network during the life cycle of machines and systems. The purpose of this paper is to describe the existing solution based on Web Services and how it can be enhanced utilizing semantic web approach.

First, the paper describes automation and ICT challenges from business and technology point of view. Next, thAe paper presents a remote and networked service solution based on a business hub approach. The solution consists of service provider’s Central Hub and several customers’ Site Hubs, which have been integrated together over network. Finally, the benefits and future challenges of the new solution and semantic web utilization and approach are discussed.

The emergence of Semantic Web (SW) and the related technologies promise to make the web a meaningful experience. However, high level modeling, design and querying techniques proves to be a challenging task for organizations that are hoping to utilize the SW paradigm for their industrial applications. To address one such issue, in this paper, we propose an abstract view model with conceptual extensions for the SW. First we outline the view model, its properties and some modeling issues with the help of an industrial case study example. Then, we provide some discussions on constructing such views (at the conceptual level) using a set of operators. Later we provide a brief discussion on how such this view model can utilized in the MOVE [1] system, to design and construct Ontology views to support Ontology extraction.

In this paper we discuss the issues related to information system technologies. The problems of hardware based services and insufficiency in the widely accepted standards have limited dynamic aspects of industrial applications. Besides the hardware, software and communication considerations one has to look into the system integration, user involvement and service aspects due to the impact of web technologies. We present some of the high level approaches provided by the semantic web technologies in a heterogeneous collaboration network and also discuss the approaches for designing and describing the information architecture of these information systems.

In this paper we propose an authorisation definition and access control solution for Web Services. In our proposal we define our access control policies using an OWL-DL language based on the extensible Access Control Markup Language (XACML). We propose the use of resource and subject metadata ontologies, also written in OWL. We then present a complete Web Services architecture which incorporates this access control model. As part of this architecture we propose a novel document filtering mechanism according to the semantic enriched access control policies.

Industrial application development approaches are striving for solutions that promote the rapid development of flexible and adaptable systems and the exploitation of legacy systems and resources. The Service-oriented Development (SOD) paradigm, a current trend in software development, could be beneficial to industrial application development approaches. However, the heterogeneity in existing standards and protocols for the discovery of the various service types is an obstacle for the use of SOD in industry. This paper addresses this issue by proposing a solution that supports the unified discovery of heterogeneous services and thus supporting the use of SOD in industry. The proposed solution comprises a generic service model (GeSMO), which facilitates the specification of heterogeneous services, a query language called Unified Service Query Language (USQL), based on GeSMO, which facilitates the unified discovery of heterogeneous services within heterogeneous service registries and a query engine called USQL Engine, that enables the execution of queries described in terms of the USQL, upon heterogeneous service registries.

A number of web services are now available and it therefore seems natural to reuse existing web services to create composite web services. The key to the problem of web services composition is how to model the input and output data dependency of candidate web services and how to satisfy that of a service request by composition efficiently. In this paper we propose an algorithm based on the concept of invocation layer and Knaster-Tarski fixpoints theorem, which can be used to get the least invocation layers of candidate web services to satisfy the given service request. Then we design another search algorithm based on A* procedure to find the best composition ways according to the invocation layers.

Today’s business is becoming global and knowledge-intensive. This requires business systems capable of knowledge identification, knowledge acquirement, knowledge distribution and knowledge maintenance in terms of universal knowledge understanding. Semantic knowledge management is expected to meet this requirement. This paper presents the fundamentals of semantic knowledge management, including basic concepts, knowledge dichotomy, knowledge solidification modes, and a common semantic knowledge management system.

Future services must become intelligent to meet the high demands of pervasive computing environments. But until pervasive systems with their ambient intelligence supersede conventional mobile computing environments, it is quite a challenge to incorporate context-awareness and adaptability in services currently available. Such step would bring outstanding flexibility and ubiquity to contemporary mobile computing systems and semantically rich web environments. This paper presents a distinct vision of portable service provisioning which elaborates the concept of a portable service by proposing a dynamic reconfigurable service application design based on context-aware infrastructure support.