Thesis (M. S.)--Mechanical Engineering, Georgia Institute of Technology, 2007. / Rosen, David, Committee Chair ; O'Connor, Jerry, Committee Member ; Fedorov, Andrei, Committee Member.

Thesis (M.S.)--Ohio University, June, 2005. / Title from PDF t.p. Includes bibliographical references (p. 58)

Thesis (Ph. D.)--Florida State University, 2006. / Advisors: Chuck Zhang, Ben Wang, Florida State University, College of Engineering, Dept. of Industrial and Manufacturing Engineering. Title and description from dissertation home page (viewed Sept. 18, 2006). Document formatted into pages; contains xiii, 168 pages. Includes bibliographical references.

Thesis (M.Sc.)--City University of Hong Kong, 2005. / At head of title: City University of Hong Kong, Department of Physics and Materials Science, Master of Science in materials engineering & nanotechnology dissertation. Title from title screen (viewed on Sept. 4, 2006) Includes bibliographical references.

Stanley B. Gershwin. / Bibliography: leaves [9-10] / "May, 1982." "DAR78-17826"

Thesis (M.S.)--Texas State University--San Marcos, 2008. / Vita. Includes bibliographical references (leaves 82-84). Also available on microfilm.

Orientador: Alessandro Roger Rodrigues / Co-orientador: Hidekasu Matsumoto / Banca: Wyser Jose Yamakami / Banca: Luciana Montanari / Resumo: Eletroerosão é um processo não convencional de usinagem que se baseia na remoção de material por sucessivas descargas elétricas. Durante a descarga, as temperaturas podem atingir 12.000°C, seguidas de um rápido resfriamento, criando uma zona termicamente afetada na superfície da peça. Essa zona possui propriedades diferentes com relação ao material base como: dureza superior, composição microestrutural e ainda podem existir microtrincas que afetarão o desempenho da peça usinada. Este trabalho estudou a influência do tamanho de grão da peça usinada na integridade superficial resultante. Para os ensaios utilizou-se um aço baixo carbono comercialmente conhecido como COS AR 60 com tamanhos de grãos ferríticos distintos. Avaliou-se a integridade superficial a partir de um perfil de microdureza e imagens da microestrutura resultante. Também foi avaliada a formação de microtrincas, bem como suas espessuras. Verificou-se que a condição de desbaste resulta em camadas brancas de maiores espessuras e ainda que os materiais com grãos ultrafinos usinados sob mesma condição que aqueles com grãos convencionais apresentam camadas brancas menores. A microdureza é maior na camada branca quando comparada com as outras camadas. Os materiais com grãos ultrafinos apresentam uma transição de microdureza mais suave quando comparada a dos grãos convencionais, podendo... / Abstract: Electrical Discharge Machining (EDM) is a non-conventional machining process which is based on material removal by successive electrical discharges. During each discharge temperatures can reach 12,000 °C, followed by rapid cooling, creating a heat-affected zone on the workpiece surface. This zone has different properties with respect to the base material (bulk) such as higher hardness, microstructural composition and may still exist microcracks that will affect the performance of the machined part. This research determined the influence of workpiece grain size on the machined surface integrity. Low carbon steel named commercially as COS AR 60 with different ferritic grain sizes was applied to machining tests. Surface integrity of the machined subsurface (white layer, heat- affected zone and bulk) was evaluated by considering microhardness gradient, microstructure composition and microcracks formation. The results show that the roughing condition increases the white layer but it is smaller for ultrafine-grained material. The hardness is highest in white layer when compared to other layers. The materials with ultrafine grains present a softer microhardness transition as compared with the conventional grains, which may improve the performance of the part in service from the standpoint of crack propagation / Mestre

This dissertation discusses the application of additive manufacturing technologies for production of a large-scale rapid prototyping machine, which will be used to produce moulds for prototype composite turbine blades for the emerging renewables energy industry within the Eastern Cape region in South Africa. The conceptualization and design of three complete printer builds resulted in the amalgamation of a final system, following stringent theoretical design, simulation, and feasibility analysis. Following the initial product design cycle stage, construction and performance testing of a large-scale additive manufacturing platform were performed. In-depth statistical analysis of the mechatronic system was undertaken, particularly related to print-head locational accuracy, repeatability, and effects of parameter variation on printer performance. The machine was analysed to assess feasibility for use in the mould-making industry with accuracy and repeatability metrics of 0.121 mm and 0.156 mm rivalling those produced by some of the more accurate fused deposition modellers commercially available. The research data gathered serves to confirm that rapid prototyping is a good alternative manufacturing method for wind turbine blade plug and mould production.

The research Analyses, PROFIBUS Communication using Process Automation and Decentralized Periphery against Conventional (4-20mA) was based on the process plant constructed in 2012 by staff and students in the Department of Instrumentation and control at Mangosuthu University of Technology. Further work was not done including configuring the entire process plant, testing all devices and display the image of the process plant on human machine interface. The process plant operation was never tested and the research topic has not been attempted before. The research was conducted to improve the existing plant to full operation or functional project. The research study was conducted in March 2013 by BZT Ntshangase, it was established that both DP flowmeter and PA flowmeter were not tested before, not calibrated correctly and both drives which are (MM440 and MM420) were not setup to control both pump1 and pump 2 in manual or auto mode. The Programmable Logic Controller (PLC) was not configured to communicate with all devices on the network. PROFIBUS-DP and PROFIBUS-PA devices were not set up; input measurements were not scaled to read within certain limits. All devices used in the process plant were not assigned unique addresses for the network and DSG files were not installed so that Programmable logic controller (PLC) would identify all devices on the PROFIBUS network. The research was based on analysis of PROFIBUS communication using process automation and decentralized periphery against conventional (4-20mA), where one flowmeter was communicating with a PLC via PROFIBUS-DP and the other flowmeter was communicating through PLC via ET-200M to a DP/PA coupler. Research objective was to examine the time response between the two signals, data transmission, network configurations and their communication protocols and including transmission rate for both networks. Process plant components used in the research were tested for linear scaling, reliability, generalizability and validity. The reason for performing these tests was to produce consistent results and to checks how similar results are if the research was repeated under similar circumstances. During testing, respectable results were achieved. All simulated results were compared with the real-time results and then a conclusion drawn based on the obtained information and facts. Project design, implementation, test procedures and test results were achieved because prototype performed as per design and research objectives were achieved. Simulation tests were conducted and the obtained results analysed. The achieved results showed that the proposed solution or the prototype system performed as per design. The experimental results could be useful to other researchers in the future. At the end of the study conclusion and some recommendations for further studies are discussed efficiently to utilize resources in the process plant verification and validation. / Electrical Engineering / M. Tech. (Electrical Engineering)

Orientador: Fernando Bernardi de Souza / Co-orientador: Renato de Campos / Banca: José de Souza Rodrigues / Banca: João Pedro Albino / Dissertação (mestrado) - Universidade Estadual Paulista "Julio de Mesquita Filho", Faculdade de Engenharia / Resumo: O Business Process Management (BPM) é considerado por alguns autores um dos temas mais atuais na era da informação, pois, de um lado, ele aborda a interação de pessoas e organizações e, de outro, softwares de reconhecimento de processos. O BPM une gestão de negócio e tecnologia da informação promovendo a interação e melhoria dos processos de negócio das organizações ao utilizar métodos, técnicas e ferramentas de modelagem, publicação, controle e análise de processos operacionais envolvendo pessoas e sistemas diversos. Neste trabalho é apresentada uma revisão bibliográfica sobre processos, processos de negócio, gestão de processos de negócio, gestão de processos de negócio em organizações públicas, estruturação e modelagem de processo, maturidade em processos de negócios e principais linguagens e ferramentas para modelagem de processos de negócio. O objetivo deste trabalho foi verificar como o BPM pode auxiliar na melhoria dos processos de uma Universidade Pública do Estado de São Paulo, além de identificar potenciais limitantes a entraves ao uso do BPM neste contexto. Para isso, foi realizada a comparação de algumas linguagens de modelagem de processos e de alguns softwares de modelagem de processos de modo a identificar as melhores ferramentas para o desenvolvimento deste trabalho. Após, procedeu-se com a aplicação do ciclo de gerenciamento de BPM, passando pelas etapas de planejamento, modelagem e otimização e implantação dos processos. Além dos benefícios da aplicação do BPM, como redução de tempo e custos de execução dos processos, o aumento do conhecimento, sobre o processo, a redução de burocracia para sua execução e automação dos processos através do desenvolvimento de um software de gerenciamento dos processos, foram encontradas limitações para sua implantação, como a estrutura organizacional de uma Universidade Pública, o número e a complexidade dos processos, o... / Abstract: The business Process Management (BPM) is one of the current issues in the information age, because on the one hand, it addresses the interaction of people and organizations and on the other, recognition software processes. BPM unites business management of organizations to use methods, techniques and modeling tools, publication, control and analysis of business processes involving people and different systems. This work presents a literature review of processes, business processes, management of business processes, management of business processes, management of business processes in public organizations, structuring and process modeling, business process maturity and the major languages and tools for modeling business processes in order to see how BPM can help improve the processes of a Public University of São Paulo State, in addition to identifying and limiting potential barriers to the use of BPM in this context. For this, the comparision of some languages of process modeling and some modeling software processes to identify the best tools for the development modeling and some modeling software processes to identify the best tools for the develpment of this work was performed. After, we proceeded with the implementation of the BPM lifecycle management, through the stages of planning, modeling and optimization and implementation of processes. Besides the benefits of application of BPM, such as reduced time and processes running costs, increased knowledge about the process, bureaucracy reduction for its implementation and automation of processes through the development of a management software processes were found limitations for its implementation, such as the organizational structure of a public university, the number and complexity of cases, the level of maturity in which the proceedings are, cultural issues and resource constraints for acquisition of suitable tools for deploying BPM / Mestre