1,720,953 research outputs found
Implantação de um MES (sistema de execução de manufatura) em um ambiente de manufatura enxuta: um estudo de caso em uma linha de montagem de produtos da linha branca
Get PDFDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Mecânica, Florianópolis, 2010Os princípios e as práticas das organizações Lean são reconhecidas no mundo inteiro como a maneira mais eficaz de construir e sustentar a melhoria contínua das empresas, tendo em vista que o mercado global tem exigido das empresas uma eficácia maior e sempre crescente em tudo o que fazem. Melhorar a produtividade, reduzir custos e oferecer produtos de qualidade são fatores vitais para toda e qualquer empresa do mundo. Como a produção em massa está obsoleta no alcance destes objetivos foi necessária uma melhor forma de organizar e gerenciar os relacionamentos com clientes, cadeia de fornecedores, desenvolvimento de produtos e operações de produção, uma abordagem na qual a Toyota foi pioneira após a segunda Guerra Mundial. Essa abordagem é chamada de Manufatura Enxuta (Lean Manufacturing), e trata-se de uma forma de fazer cada vez mais com cada vez menos. Para alcançar os resultados esperados de produtividade e qualidade desejados com a implantação de um Sistema Enxuto de Produção é essencial a existência de um sistema que meça os indicadores do chão de fábrica, tais como OEE (Overall Equipment ffectiveness), tempos de ciclo das máquinas, índice de manutenção, tempos de troca, índice de refugo, produtividade de linhas de montagem, etc e que o mesmo seja a comprovação das melhorias alcançadas e retro-alimente as novas melhorias. Os sistemas que fornecem informações em tempo-real do chão de fábrica são chamados de MES (Manufacturing Execution System). Eles já são amplamente utilizados em fábricas de produção contínua, como indústrias químicas, alimentícias, energéticas, etc, porém, quando falamos de indústrias de produção discreta, especialmente linhas de montagem, os MES são pouco desenvolvidos epouco utilizados. Neste trabalho foi especificado e implementado um sistema MES em linhas de montagem de refrigeradores, voltado à redução de desperdícios utilizando conceitos da Manufatura enxuta. Dentre os ganhos resultantes da implementação do sistema MES, o principal foi o aumento da produtividade. Outros ganhos foram a rastreabilidade de produtos, a confiabilidade dos dados gerados e a adoção do MES como sistema oficial de gestão de linhas de montagem. Trabalhos de melhoria, como projetos de metodologia 6-sigma, passaram a utilizar o MES como fonte de dados e comprovação de ganhos.The principles and practices of Lean organizations are recognized worldwide as the most effective way to build and sustain continuous improvement of companies, considering that the global market has demanded greater and growing efficiency of enterprises in everything they do. Improve productivity, reduce costs and provide quality products are vital factors for any company in the world. As mass production is outdated in reaching these goals, it was necessary a better way to organize and manage customer relationships, supply chain, product development and production operations, an approach in which Toyota has pioneered after the World War II. This approach is called Lean Manufacturing and this is one way of doing more with less. To achieve the expected results of productivity and quality desired by the implementation of a Lean Production System is essential to the existence of a system to measure the key performance indicators of the shop floor, such as OEE (Overall Equipment Effectiveness), cycle times of machines, maintenance index, changeover times, scrap rate, productivity of assembly lines, etc. and that it is proof of the improvements achieved and back-feed the new improvements. The systems which provide real-time shop floor information are called MES (Manufacturing Execution System). They are already widely used in continuous production plants, such as chemical, food, energy, etc. However, when we speak of discrete manufacturing industries, especially assembly lines, the MES are underdeveloped and underutilized. In this research was specified and implemented a MES system in assembly lines of refrigerators, aimed at reducing waste by using concepts of Lean Manufacturing. Among the gains resulting from the implementation of the MES system, the principal was the increase in productivity. Other gains were the traceability of products, the reliability of data generated and the adoption of MES as the official system of management of assembly lines. Improvement projects, such as 6-Sigma methodology bega0n to use the MES as a data source and proof of earnings
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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