Unbalance is one of the most common malfunctions found in rotating machines generating high vibration amplitudes that can lead to fatigue and wear of rotor elements. There are several well-known balancing techniques wherein one of the most widespread approaches is the so-called influence coefficients method (IC method). Aiming to increase the robustness of the standard IC method, in this paper, a revised IC balancing methodology for rotating machines is proposed. In this sense, a preprocessing stage is applied to access the uncertainties affecting the rotating machine. In this sense, measurement data sets evaluated under the fuzzy logic approach are used. Thus, the rotor vibration responses measured over a long period are considered by means of a fuzzy transformation (defining unbalance fuzzy sets). The unbalance condition of the rotating machine is determined through a defuzzification process. This unbalance condition is then introduced in the IC method algorithm aiming at obtaining correction weights and associated angular positions that increase the balancing robustness as compared with the classical approach. Numerical and experimental studies are used to evaluate the effectiveness of the proposed methodology. The obtained results illustrate the capacity to increase the balancing overall robustness.
RESUMO Esta revisão buscou sintetizar as práticas em serviços farmacêuticos relacionadas ao gerenciamento e às atividades clínicas em distintos contextos para a prevenção e a assistência durante a epidemia da Covid-19. Trata-se de uma revisão da literatura sobre políticas públicas de saúde para a reorganização da assistência farmacêutica em países atingidos pela Covid-19 realizada nas bases de dados Web of Science, Science Direct e Biblioteca Virtual em Saúde. Foram selecionados 9 artigos, sendo todos publicados em 2020. Destes, 90% foram publicados pelo periódico ‘Research in Social an Administrative Pharmacy’ e tiveram como local de realização de estudo países de três continentes. Foram relatadas e debatidas experiências sobre a atuação do profissional farmacêutico e o papel da farmácia comunitária no contexto da pandemia da Covid-19, e sobre a reorganização destes serviços, evidenciadas no contexto de crise, tanto no que tange à oferta de serviços quanto ao próprio espraiamento da doença. O modelo adotado pelos países para o enfrentamento da Covid-19, no âmbito dos serviços farmacêuticos comunitários, baseou-se em atividades para a garantia da qualidade e logística de insumos e medicamentos, triagem e monitoramento de pacientes, acompanhamento farmacoterapêutico, educação em saúde e informações sobre o uso de medicamentos.
This is a literature review that aimed to analyze the scope of public health policies for the LGBT population in different countries on the European continent, North America and Oceania in order to identify the differences and similarities in content and organization of services and programs. 24 articles were selected to compose the corpus of this review. The results demonstrated the existence of different scopes of health policies for LGBT in the USA, Canada, Australia and the United Kingdom and a heterogeneous result with regard to the objective of the implementation of actions, with emphasis on directions related to LGBT aging, smoking cessation, control of alcohol and other drugs use, as well as cancer and HIV care policies. There was a predominance of approaches limited to the diseases (or unsafe sexual practices, instead focus to comprehensive health care to the LGBT population at different levels of complexity in health care. Furthermore, cultural differences imply granting comprehensive or restrictive health rights. It's necessary to improve the design of public health promotion policies for gender and sexual diversity that are more inclusive and concatenated with other determinants that permeate comprehensive health care.
This dissertation proposes a new approach to the balancing technique based on the mathematical model. The proposed methodology deals with the uncertainties that affect the balancing performance. In this case, the uncertain parameters were treated in the mathematical model by the Monte Carlo Method and the Latin Hypercube Method, which were used in combination in the robust balancing. The mathematical model of the rotor was formulated by using the finite element method, because it is able to adequately represent the dynamic behavior of a rotating machine taking into account the various subsystems, such as the shaft, coupling, discs, bearings, and the gyroscopic effect. Once the subsystems are defined and coupled, the parameters considered unknown were identified in order to obtain a representative model of the system. The proposed robust balancing approach is compared with the deterministic methodology considering numerical and experimental results for validation purposes. The results demonstrate that the robust balancing approach has a gain in efficiency when compared to the deterministic technique. Therefore, more significant results were obtained by using the proposed approach regarding to the reduction of the rotor vibration amplitudes.
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