5,647 research outputs found

    Decifrando o genoma em grande escala.

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    A determinação das funções gêni~~stem de~andado um grande avanço das ciências genômicas, cujas tecnologias concentram-se, principalmente, na geração e no estudo de uma grande quantidade de dados. O ponto de apoio para o entendimento da função gênica e da estrutura do genoína tem sido o sequenciamento de genomas completos e do genoma expresso em grande escala. Mapas físicos e genéticos têm sido integrados com informações genôrnicas e de expressão, resultando em bancos de dados públicos altamente informativos para diferentes espécies animais evegetais. Tais informações auxiliam em vários aspectos a análise·de expressão gênica, a determinação dos efeitos de processamento de éxons.e do número de cópias gênicas e cromossômicas, culminando na determinação das funções biológicas e do mecanismo de ação de vários genes. São descritos o surgimento de novas tecnologias e a evolução de algumas inovações já existentes, voltadas para a identificação de funções gênicas

    Ergonomic design intervention in a coating production area

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    The aim of this study is to redesign two workstations in a PVD coating production area, considering productivity and ergonomic aspects. Through the elimination of wastes such as unnecessary movements and transportations and by reducing the awkward postures as arm flexion larger than 45º, the productivity in the loading and unloading workstations increased 9% and 5%, respectively, and the ergonomic risk was improved from medium to acceptable. RULA was the chosen method to evaluate the ergonomic situation and anthropometric studies were performed to find the ideal ergonomic solution. This study shows the importance to consider ergonomic conditions when designing or redesigning a workstation in order to get effective productivity improvements.(undefined)info:eu-repo/semantics/publishedVersio

    Evidence of Two Distinct Dynamic Critical Exponents in Connection with Vortex Physics

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    The dynamic critical exponent zz is determined from numerical simulations for the three-dimensional (3D) lattice Coulomb gas (LCG) and the 3D XY models with relaxational dynamics. It is suggested that the dynamics is characterized by two distinct dynamic critical indices z0z_0 and zz related to the divergence of the relaxation time τ\tau by τξz0\tau\propto \xi^{z_0} and τkz\tau\propto k^{-z}, where ξ\xi is the correlation length and kk the wavevector. The values determined are z01.5z_0\approx 1.5 and z1z\approx 1 for the 3D LCG and z01.5z_0\approx 1.5 and z2z\approx 2 for the 3D XY model. It is argued that the nonlinear IVIV exponent relates to z0z_0, whereas the usual Hohenberg-Halperin classification relates to zz. Possible implications for the interpretation of experiments are pointed out. Comparisons with other existing results are discussed.Comment: to appear in PR
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