Dependability
Mostrando 25-36 de 41 artigos, teses e dissertações.
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25. DEPENDABILITY OF OPEN MULTI-AGENT SYSTEMS BASED ON A LAW-GOVERNED APPROACH / FIDEDIGNIDADE DE SISTEMAS MULTIAGENTES ABERTOS GOVERNADOS POR LEIS
Com o aumento da complexidade dos SMA´s governados por leis, tornouse mais difícil projetar e implementar requisitos referentes à tolerância a falhas, principalmente por não existir nenhum ponto de controle sobre tais sistemas. E, apesar disto, não são conhecidas soluções que abordem tais questões na literatura de governança de SMA´s baseados em
Publicado em: 2006
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26. A modeling methodology for hierarchical control system and its aplication
Current and future computerized systems and infrastructures are going to be based on the layering of different systems, designed at different times, with different technologies and components and difficult to integrate. Control systems and resource management systems are increasingly employed in such large and heterogeneous environment as a parallel infrastr
Journal of the Brazilian Computer Society. Publicado em: 2005-04
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27. Stress and integrity analysis of steam superheater tubes of a high pressure boiler
Sources that can lead to deterioration of steam superheater tubes of a high pressure boiler were studied by a stress analysis, focused on internal pressure and temperature experienced by the material at real operating conditions. Loss of flame control, internal deposits and unexpected peak charge are factors that generate loads above the design limit of tube
Materials Research. Publicado em: 2004-03
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28. Uma abordagem arquitetural para tolerancia a falhas em sistemas desoftware baseados em componentes
This work concentrates on the systematic treatment of dependability requirements during the development of modern critical software systems, such as banking and electronic commerce. Such software systems constantly evolve and are constrained by short time-to-market and low development costs requirements. As a result, the development of these modern critical
Publicado em: 2004
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29. Tolerancia a falhas em sistemas de agentes moveis
Mobile agent is a process capable of roaming autonomously through the network, executing operation locally to a host. Agents can be employed to perform some traditional tasks. In order to enforce dependability in this new paradigm we present a protocol to coordinate a replicated agent system capable of tolerating failstop and communication faults
Publicado em: 2003
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30. Introdução ao conceito de função: a importância da compreensão das variáveis
This research aims to introduce the concept of function throughout the comprehension of the dependable and undependable variables, and of the relation between them. Its fundaments are on the Didactics Engineering principles by the creation and application of a teaching activity sequence and a posterior analysis of the collected data. It is based on Raymond D
Publicado em: 2003
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31. Uma arquitetura de software baseada em padrões de projeto para o desenvolvimento de aplicações concorrentes confiaveis
Complex computer systems are prone to errors of many kinds, and the most reasonable way of dealing with them is to accept that any complex system has faults and to employ appropriate features for tolerating them during run time. We claim that the most beneficial way of achieving fault tolerance in complex systems is to use system structuring which has fault
Publicado em: 2001
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32. Uma arquitetura reflexiva para injetar falhas em aplicações orientadas a objetos
Injeção de falhas por software é uma técnica que vem sendo muito utilizada para validar as propriedades de segurança de funcionamento (dependability) de sistemas de software. Essa técnica consiste em injetar padrões de erros em um software em execução. Para injetar falhas e monitorizar seus efeitos alguma forma de instrumentação deve ser introduzi
Publicado em: 1998
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33. PROCESS CONTROL SYSTEMS : DEPENDABILITY AND PERFORMANCE MODELING
Today, a wide variety of computer systems are required to react automatically to various events generated by external processes and/or human operators. An important class of these process control systems, called hard real-time systems, need to respond to events under severe timing constraints expressed in terms of deadlines and earliest starting times. In ge
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/05/1997
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34. Dependability of sensitivity tests in primary culture.
Primary sensitivity tests were done on 90 specimens of infected urine, and the results were compared with those of secondary tests on pure cultures done by three diffusion methods. There was good correlation between the four methods. In a second study, the reliability of primary tests prepared in the clinical laboratory on specimens of pus was assessed, and
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35. Evaluation of the 24-h API 20A anaerobe system for identification of Clostridium difficile.
Accurate identification of Clostridium difficile is important when antibiotic-associated diarrhea or pseudomembranous colitis is suspected. Presumptive identification of C. difficile was made on the basis of microscopic features and colony characteristics on cycloserine, cefoxitin, fructose, and egg yolk agar medium. We studied the reliability of the 24-h AP
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36. Resistance and recovery studies on ultraviolet-irradiated spores of Bacillus pumilus.
A spore suspension model and a procedure for recovering ultraviolet (UV)-irradiated spores of Bacillus pumilus were investigated. A most-probable-number tube dilution method using double-strength Trypticase soy broth was found to be superior to the agar plate method for recovering optimal numbers of spores irradiated with sublethal doses of UV energy. Aqueou