oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 21 )

2019 ( 138 )

2018 ( 170 )

2017 ( 149 )

Custom range...

Search Results: 1 - 10 of 111461 matches for " José Francisco Ferreira Ribeiro "
All listed articles are free for downloading (OA Articles)
Page 1 /111461
Display every page Item
Manufacturing Cells Formation Based on Graph Coloring  [PDF]
José Francisco Ferreira Ribeiro
Journal of Service Science and Management (JSSM) , 2010, DOI: 10.4236/jssm.2010.34056
Abstract: A method for cellular manufacturing design in Group Technology is presented in this paper. The proposed method computes the dissimilarities between parts and organizes the production system in part-families and group-machines. A graph corresponding to the production system is generated and a coloring algorithm is activated in order to obtain a number of cells equal to the desired number of cells. The corresponding program was written in Matlab language and runs on a microcomputer. The results obtained on several examples found in the literature are consistently equivalent to or even better than those hitherto proposed, in terms of inter-cell moves and dimensions of the cells.
Organiza??o de um sistema de produ??o em células de fabrica??o
Ribeiro, José Francisco Ferreira;Meguelati, Sma?ne;
Gest?o & Produ??o , 2002, DOI: 10.1590/S0104-530X2002000100006
Abstract: block-diagonalization of the part-machine incidence matrix for designing manufacturing cells is an important step in the implementation of group technology. the present work proposes a method for block-diagonalization based on cross-classification of parts and types of machines with progressive assignation of types of machines to families of parts. examples, which allow us to test and compare the proposed method with other available methods, are presented. the results obtained of several problems found in the literature are consistently equivalent to or even better than hitherto proposed, in terms of number of intercell movements and dimensions of cells.
Organiza o de um sistema de produ o em células de fabrica o
Ribeiro José Francisco Ferreira,Meguelati Sma?ne
Gest?o & Produ??o , 2002,
Abstract: A bloco-diagonaliza o da matriz de incidência pe as-máquinas para efetuar o projeto de células de fabrica o é uma etapa importante para a implementa o da Tecnologia de Grupo. Este artigo prop e um método de bloco-diagonaliza o baseado em classifica o cruzada de pe as e tipos de máquinas com progressiva atribui o dos tipos de máquinas às famílias de pe as. Exemplos que permitem teste e compara o do método proposto com outros métodos existentes s o apresentados. Os resultados obtidos de exemplos extraídos da literatura s o equivalentes ou melhores do que aqueles disponíveis, em termos do número de movimentos intercélulas e das dimens es das células projetadas.
Programa??o de opera??es com restri??es disjuntivas
Noronha, Adriana Backx;Ribeiro, José Francisco Ferreira;Ribeiro, Cassilda Maria;
Gest?o & Produ??o , 1996, DOI: 10.1590/S0104-530X1996000200006
Abstract: the job shop scheduling problem consists of determining a sequence of jobs to be processed on each of the available machines such that the schedule time is minimized. the parts are processed in accordance with a prespecified technological ordering and the required processing times of the operations pertaining to each job are known. in this paper we study the job shop scheduling problem in two ways, namely, integer programming and graph theory. a computational program based on graph theory was developed and tested. this program allows us to solve efficiently several examples, despite the non-polynomial nature of the problem studied.
Morfologia polínica das espécies de Heliotropium L. (Boraginaceae) ocorrentes em Pernambuco, Brasil
Miranda de Melo,José Iranildo; Ferreira de Sales,Margareth; Ribeiro dos Santos,Francisco de Assis;
Ernstia , 2006,
Abstract: this work aims to contribute to the inter-specific delimitation of pernambucan species of heliotropium by a pollen morphology study. the species studied were h. angiospermum murray, h. curassavicum l., h. elongatum (lehm.)i.m. johnst., h. indicum l., h. polyphyllum lehm., h. procumbens mill. and h. ternatum vahl. the palynological samples were acetolyzed and analyzed under a light microscope. it has been verified that pollen grains are medium sized (small only in h. ternatum), prolate, subprolate to prolatespheroidal, tricolporate or 6 to 8-heterocolpate. the ornamentatation of the exine is psilate, microrreticulate, slightly perforated or slightly scabrous. differences in the pollen morphology were observed among the most of the species and an identification key based on pollen morphology features is presented.
Introdu??o de catalisadores metalocênicos como estratégia competitiva da indústria de termoplásticos
Ribeiro Fo, Francisco A.;Netto, Maria José S. Ferreira;Hemais, Carlos A.;
Polímeros , 1997, DOI: 10.1590/S0104-14281997000300009
Abstract: recent technological innovation in the polymer sector has produced new catalysts, which may change the structure of the industry. competitive strategies adopted by these companies are analysed as well as the impact caused by the adoption of metallocene catalysts.
Prevalência da infec??o pelo vírus linfotrópico humano de células T - HTLV-1/2 entre puérperas de Cuiabá, Estado de Mato Grosso, 2006
Ydy, Ranuce Ribeiro Aziz;Ferreira, Dalton;Souto, Francisco José Dutra;Fontes, Cor Jésus Fernandes;
Revista da Sociedade Brasileira de Medicina Tropical , 2009, DOI: 10.1590/S0037-86822009000100007
Abstract: the prevalence of human t-cell lymphotropic virus (htlv-1/2) infection among puerperae in the state of mato grosso, brazil, is unknown. through this cross-sectional study, the prevalence of htlv-1/2 infection among puerperae attended at three public maternity hospitals in cuiabá, state of mato grosso, was defined. between april and september 2006, 3,831 deliveries took place and 2,965 puerperae underwent serological tests for htlv-1/2: enzyme-linked immunosorbent assay (elisa) and western blot. the mean age of the women studied was 23.9 years. the prevalence of htlv-1/2 was 0.2%, i.e. similar to the prevalence observed in the general population of many developed centers in brazil. this finding of low prevalence suggests that there is still no justification for introducing public health interventions for the population of pregnant women in our setting, to reduce the vertical transmission of htlv-1/2.
Morfologia polínica das espécies de Heliotropium L. (Boraginaceae) ocorrentes em Pernambuco, Brasil
José Iranildo Miranda de Melo,Margareth Ferreira de Sales,Francisco de Assis Ribeiro dos Santos
Ernstia , 2006,
Abstract: Com o objetivo de auxiliar na delimita o interespecífica de Heliotropium foram estudados os gr os de pólen das espécies ocorrentes em Pernambuco, Brasil: H. angiospermum Murray, H. curassavicum L., H. elongatum (Lehm.) I.M. Johnst., H. indicum L., H. polyphyllum Lehm., H. procumbens Mill. e H. ternatum Vahl. O material polínico foi acetolisado e analisado em microscópio óptico. Verificou-se que os gr os de pólen s o médios (pequenos somente em H. ternatum), prolatos, subprolatos a prolato-esferoidais, tricolporados ou 6 a 8-heterocolpados. A ornamenta o da exina apresenta-se psilada, microrreticulada, levemente perfurada ou levemente escabrada. Diferen as na morfologia polínica foram observadas entre a maioria das espécies. é fornecida uma chave de identifica o baseada em caracteres da morfologia polínica. This work aims to contribute to the inter-specific delimitation of Pernambucan species of Heliotropium by a pollen morphology study. The species studied were H. angiospermum Murray, H. curassavicum L., H. elongatum (Lehm.)I.M. Johnst., H. indicum L., H. polyphyllum Lehm., H. procumbens Mill. and H. ternatum Vahl. The palynological samples were acetolyzed and analyzed under a light microscope. It has been verified that pollen grains are medium sized (small only in H. ternatum), prolate, subprolate to prolatespheroidal, tricolporate or 6 to 8-heterocolpate. The ornamentatation of the exine is psilate, microrreticulate, slightly perforated or slightly scabrous. Differences in the pollen morphology were observed among the most of the species and an identification key based on pollen morphology features is presented.
Resistência da soja à ferrugem-asiática avaliada pela análise da produtividade de gr?os
Lima, Wilmar Ferreira;Prete, Cássio Egídio Cavenaghi;Ribeiro, Aliny Simony;Toledo, José Francisco Ferraz de;
Summa Phytopathologica , 2012, DOI: 10.1590/S0100-54052012000100012
Abstract: the main objectives of this work were to study the soybean resistance and/or tolerance to asian rust and to select the inbred lines more productive in relation to asian rust. data from six experiments involving the parental lines and their f2, f3 and f4 generations were used in this experiment. it was carried out in londrina, parana state, during the 2005/06, 2006/07 and 2007/08 cropping seasons. a completely randomized experiment with individual plants sown in hill plot was used (01 hill plot = 01 plant). soybean resistance and/or tolerance to asian rust is controlled by major and minor genes expressing mainly additive effects dispersed in the parents. it is possible to select inbred lines superior to the best yielding parent from most crosses. the narrow sense heritability for the yield trait under rust pressure ranged from average to high (0.324 to 0.815) at the f3 progeny level, which warrants gains from selection.
UMA CONTRIBUI O EPISTEMOLóGICA à CONTABILIDADE INTERNACIONAL: ANáLISE NAS DISSERTA ES E TESES BRASILEIRAS DIVULGADAS NO BANCO DE DADOS DE TESES E DISSERTA ES (BDTD) ENTRE 1999 E 2008
Márcia Ferreira Neves Tavares,Jorge Expedito de Gusm?o Lopes,José Francisco Ribeiro Filho,Marcleide Maria Macêdo Pederneiras
Advances in Scientific and Applied Accounting , 2010,
Abstract: Em decorrência do processo de internacionaliza o das normas contábeis no cenário brasileiro e dos acréscimos de pesquisas acadêmicas com ênfase na contabilidade internacional, nos últimos oito anos, este estudo objetivou identificar o perfil da pesquisa nesta área nas disserta es e teses brasileiras divulgadas no banco de dados de teses e disserta es (BDTD) entre 1999 e 2008. Dessa forma, a contribui o dessa pesquisa evidencia-se na medida em que revela as tendências de investiga es na temática, bem como as diversidades e similitudes metodológicas, sugerindo a constru o de categorias que evidenciem o que está sendo mais pesquisado em contabilidade internacional, cooperando com a constru o do conhecimento através da identifica o da contribui o e rea o do Brasil em rela o ao processo de convergência das normas contábeis. A pesquisa foi caracterizada como descritiva e exploratória, utilizando o survey como técnica de procedimento. O modelo utilizado na categoria de análise foi o desenvolvido por Theóphilo e Iudícibus (2005), focando restritamente quatro pólos: epistemológico, metodológico, teórico e técnico. Como resultado, foi constatado que o perfil da pesquisa em contabilidade internacional é caracterizado predominantemente por estudos comparativos, sendo esses estudos teórico-empíricos, com ênfase na análise documental. A abordagem metodológica mais comumente utilizada é o empirismo com uma postura teórica positivista.
Page 1 /111461
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.