Knowledge-based system on optimum design of liquid retaining structures with genetic algorithms

This paper delineates the development of a prototype hybrid knowledge-based system for the optimum design of liquid retaining structures by coupling the blackboard architecture, an expert system shell VISUAL RULE STUDIO and genetic algorithm (GA). Through custom-built interactive graphical user interfaces under a user-friendly environment, the user is directed throughout the design process, which includes preliminary design, load specification, model generation, finite element analysis, code compliance checking, and member sizing optimization. For structural optimization, GA is applied to the minimum cost design of structural systems with discrete reinforced concrete sections. The design of a typical example of the liquid retaining structure is illustrated. The results demonstrate extraordinarily converging speed as near-optimal solutions are acquired after merely exploration of a small portion of the search space. This system can act as a consultant to assist novice designers in the design of liquid retaining structures.

A coupled knowledge-based expert system for design of liquid-retaining structures

This paper describes a coupled knowledge-based system (KBS) for the design of liquid-retaining structures, which can handle both the symbolic knowledge processing based on engineering heuristics in the preliminary synthesis stage and the extensive numerical crunching involved in the detailed analysis stage. The prototype system is developed by employing blackboard architecture and a commercial shell VISUAL RULE STUDIO. Its present scope covers design of three types of liquid-retaining structures, namely, a rectangular shape with one compartment, a rectangular shape with two compartments and a circular shape. Through custom-built interactive graphical user interfaces, the user is directed throughout the design process, which includes preliminary design, load specification, model generation, finite element analysis, code compliance checking and member sizing optimization. It is also integrated with various relational databases that provide the system with sectional properties, moment and shear coefficients and final member details. This system can act as a consultant to assist novice designers in the design of liquid-retaining structures with increase in efficiency and optimization of design output and automated record keeping. The design of a typical example of the liquid-retaining structure is also illustrated. (C) 2003 Elsevier B.V All rights reserved.

Multilayer transverse gradient coil design

In small, cylindrical gradient coils consisting of a single layer of wires, the limiting factor in achieving large magnetic field gradients is the rapid increase in coil resistance with efficiency. This behavior results from the decrease in the maximum usable wire diameter as the number of turns is increased. By adopting a multilayer design in which the coil wires are allowed to spread out into multiple layers wound at increasing radii, a more favorable scaling of resistance with efficiency is achieved, thus allowing the design of more powerful gradient coils with acceptable resistance values. By extending the theory used to design standard cylindrical gradient coils, mathematical expressions have been developed that allow the design of multilayer coils. These expressions have previously been applied to the design of a four-layer z-gradient coil. As a further development, the equations have now been modified to allow the design of multilayer transverse gradient coils. The variation in coil performance with the number of layers employed has been investigated for coils of a size suitable for use in NMR microscopy, and the effect of constructing the coil using wires or cuts in a continuous conducting surface has also been assessed. We find that at fixed resistance a small wire-wound two-layer coil offers an increase in efficiency of a factor of about 1.5 compared with a single-layer coil. In addition, a two-layer coil of 10-mm inner diameter has been designed and built. This coil had an efficiency of 0.41 Tm-1 A(-1), a resistance of 0.96 +/- 0.01 Omega, and an inductance of 22.3 +/- 0.2 muH. The coil produces a gradient that deviates from linearity by less than 5% over a central cylindrical region of interest of height and length 6.2 mm. (C) 2003 Wiley Periodicals, Inc.

Balancing the number and size of sites: An economic approach to the optimal design of cluster samples

The design of randomized controlled trials entails decisions that have economic as well as statistical implications. In particular, the choice of an individual or cluster randomization design may affect the cost of achieving the desired level of power, other things being equal. Furthermore, if cluster randomization is chosen, the researcher must decide how to balance the number of clusters, or sites, and the size of each site. This article investigates these interrelated statistical and economic issues. Its principal purpose is to elucidate the statistical and economic trade-offs to assist researchers to employ randomized controlled trials that have desired economic, as well as statistical, properties. (C) 2003 Elsevier Inc. All rights reserved.

Effect of lifter design on drying performance in rotary dryers

Lifter use in dryers improves mass transfer by increasing the amount of surface area available for transfer and also by increasing the velocity of gas over the particle surface. An even cross-sectional distribution of particles in a dryer improves the efficiency of operation by ensuring that evaporation from falling particles is taking place for the maximum fraction of the rotation period of the drier. Studies on lifter design to improve the cross-sectional particle distribution were performed on angled lifters. A single lifter was used and the mass-transfer rate examined as a function of angular lifter displacement. Analysis of the mass transfer characteristics of single lifters allowed performance comparisons and recommendations for lifter design.

Cobertura tem??tica do Reposit??rio Institucional da ENAP

A Cobertura Tem??tica do Reposit??rio Institucional da ENAP ?? uma linguagem document??ria que objetiva identificar as grandes ??reas tem??ticas existentes no contexto institucional da ENAP e refletir os conceitos utilizados na ??rea de conhecimento Administra????o P??blica, observando os limites de atua????o da escola. Tal estudo permitir?? um melhor controle dos termos autorizados nos diversos sistemas de informa????o da ENAP e parcerias, inclusive o Reposit??rio Institucional da ENAP.

Manual do Reposit??rio institucional da ENAP

O Manual do Reposit??rio Institucional da ENAP foi elaborado com o objetivo de auxiliar a compreens??o e utiliza????o dessa ferramenta, visando ?? capacita????o de pontos focais que far??o a submiss??o de ativos digitais, a valida????o dos documentos depositados, e dos revisores de metadados, que ir??o de fato publicar os itens no reposit??rio, orientando quanto ??s regras para o preenchimento do conjunto de metadados, e aos passos necess??rios para o fluxo de submiss??o.

Planejamento estrat??gico enquanto medida de fortalecimento institucional: a Empresa Brasil de Comunica????o

H?? na sociedade, a busca pela compreens??o sobre as vari??veis dos fen??menos que a influenciam para se manter relativamente est??vel e aqueles que a condicionam para a mudan??a. O institucionalismo possui essa complei????o pela vis??o sist??mica que disp??e. O composto social, objeto da an??lise institucional ?? complexo, pois est?? envolto por contratos sociais, ordena????es jur??dicas, corpora????es econ??micas e pol??ticas, interveni??ncia estatal, organiza????es e institui????es sociais, mas, sobretudo h?? o interesse p??blico como regente do institucionalismo. A conduta ou pr??tica social ?? disciplina orientadora de interface entre todas as ??reas. A comunica????o p??blica deve ser o reflexo do interesse p??blico, mas os representantes deste tipo de comunica????o n??o podem se apropriar de qualquer tipo de interesse, portanto precisa se conscientizar previamente de quest??es sociais, pol??ticas e econ??micas para cooperar com a institucionaliza????o da comunica????o p??blica. Assim, o trabalho analisa a partir das estrat??gias organizacionais da EBC a ader??ncia ?? perspectiva de institucionaliza????o do setor de comunica????o p??blica

Portaria n?? 297, de 30 de dezembro de 2013: institui o Reposit??rio Institucional da ENAP

Disp??e sobre o Reposit??rio Institucional da Escola Nacional de Administra????o P??blica (ENAP) e estabelece as compet??ncias e as responsabilidades a ele referentes.

Texto para discuss??o 36: relat??rio de avalia????o do curso Elabora????o de indicadores de desempenho institucional

O objetivo do presente relat??rio de pesquisa ?? apresentar os resultados finais obtidos por meio da Avalia????o de Efic??cia do curso Elabora????o de Indicadores de Desempenho Institucional, realizado pela ENAP em turma fechada junto ?? Companhia Nacional de Abastecimento (CONAB), entre os dias 10 e 21/05/1999. Os objetivos espec??ficos desta pesquisa ser??o analisados para investigar se o treinamento foi considerado satisfat??rio pela institui????o que contratou o curso; se os objetivos pedag??gicos do curso foram atingidos; se os conhecimentos e habilidades foram transferidos para o ambiente de trabalho; e se o treinamento modificou pr??ticas cotidianas, aumentando o desempenho da empresa e de suas unidades, demonstrando, de forma geral, se os benef??cios alcan??ados compensaram os custos envolvidos nos treinamentos

Elabora????o de indicadores de desempenho institucional

O Material do Aluno ?? o instrumento did??tico complementar ??s aulas presenciais do curso que, juntamente ??s orienta????es do professor e ??s pr??ticas realizadas na sala de aula, possibilita o aprendizado dos temas apresentados. Este documento apresenta seguinte estrutura: Cap??tulo 1 ??? Introdu????o: apresenta o contexto do curso de Elabora????o de Indicadores de Desempenho Institucional. Cap??tulo 2 ??? Conceitos Gerais: apresenta os conceitos que envolvem a melhor forma de defini????o e sele????o de indicadores. Cap??tulo 3 ??? S??o apresentados os principais atributos dos indicadores. Cap??tulo 4 ??? Classifica????o de indicadores de desempenho Institucional. Cap??tulo 5 ??? Estabelecimento de indicadores que ir??o compor um sistema de medi????o do desempenho institucional. Cap??tulo 6 ??? Apresenta????o dos elementos complementares: descri????o de indicadores, interpreta????o de seus resultados, estabelecimento de metas, a informatiza????o, a comunica????o de seus resultados e o desdobramento do sistema de medi????o do foco estrat??gico para o gerencial e o operacional. Cap??tulo 7 ??? Bibliografia. Este material tamb??m tem por finalidade servir de instrumento de consulta r??pida para esclarecer eventuais d??vidas do aluno na aplica????o dos conhecimentos adquiridos no exerc??cio de seu trabalho

V??deo institucional ENAP: 1997

V??deo institucional sobre objetivos e atua????o da ENAP

Comunica????o institucional e parcerias para fiscaliza????o

Diante do programa de desregulamenta????o do governo federal, em vigor, e as dificuldades para executar os trabalhos de fiscaliza????o no Estado de Minas Gerais, fazendo cumprir a legisla????o vigente do Minist??rio de Minas e Energia/D.N.C., foi iniciada a experi??ncia inovadora, com parceira de autoridades, entidades com sede nos munic??pios, visando a reprodu????o da informa????o t??cnica, com o objetivo de proteger o consumidor final, fazendo cumprir, de maneira respons??vel e transparente, as normas emanadas do ??rg??o que regula o petr??leo e os seus derivados. O citado trabalho institucional, traz tamb??m como objetivo, de dividir com as autoridades situadas em munic??pios, fora de nossa sede regional, nosso compromisso p??blico, bem como, sensibiliza-las para os diversos n??veis de responsabiliza????o, inerente a cada uma delas, dentro de sua comunidade. Apresentando como resultados positivos, a auto-sufici??ncia de resolverem a maioria dos problemas, relativos ?? distribui????o e comercio dos derivados do petr??leo e por outro lado, redu????o dr??stica de custos, com n??mero de pessoal menor