The knowledge imperfections should be considered when modeling complex problems. A solution is to develop a model that reduces the complexity and another option is to represent the imperfections: uncertainty, vagueness and incompleteness in the knowledge base. This paper proposes…

The paper describes a framework for the implementation of an elearning system based on the Semantic Web, using software agents and Java Web Services. Hopefully we have elucidated the enormous potential of making web content machine-understandable. One of the killer…

In this paper a methodology for accesing scientific data repositories on data grids is proposed. This methodology is based on ontology specification and knowledge representation. The concept of Knowledge Perspective is introduced, as the action of applying particular scientific conjectures…

The rising complexity of distributed computer systems give reason to investigate self-organization mechanism to build systems that are self-managing in the sense of Autonomic and Organic Computing.
In this paper we propose the Artificial Hormone System (AHS) as a general…

During a system’s life cycle, new requirements or changes in the existing ones imply modifying the system. Aspect-oriented software development is a new approach to the modularization of systems, yet it does not provide mechanisms to aid the evolution of…

En este trabajo se presenta una técnica para verificar modularmente atomicidad de programas bytecode Java multi-thread. Los programas deben contar con una especificación referente a los bloqueos y al acceso a los recursos compartidos para realizar la verificación modular. Se…

O atual modelo de produção científica tem como maior prioridade a promoção dessa produção através de artigos publicados em eventos científicos, o qual foram referendados por sua qualidade através de um corpo editorial.
Não há uma forma explícita de escrever…

JAVA is a general purpose concurrent class-based object-oriented programming language. This work presents an interactive program that interprets JAVA source programs directly. The cornerstone of its execution model is an execution graph, in which each node is constituted by three…

Apesar de possuir características que a tornam mais flexível que outras linguagens de programação, existem fragilidades que podem facilitar a construção de ataques usando a linguagem Java.
Um componente de extrema importância, no Modelo de Segurança da plataforma Java…

Este artículo tiene como objetivo presentar al lector los resultados parciales del proyecto en actual desarrollo: “Teacher on Line” (ToL), un moderno sistema de Educación a Distancia basado en Tecnología Web. Resultan relevantes los aspectos de desarrollo y cualidades de…