501 research outputs found

    Desenvolvimento local: o caso de estudo do seixal, o desenvolvimento como forma de melhorar a qualidade de vida local

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    O desenvolvimento engloba variadas vertentes, neste estudo será abordada a temática do desenvolvimento local tendo por base o Rejuvenescimento Populacional para que uma localidade se desenvolve sustentavelmente através das suas potencialidades locais. Situa do na Margem sul do Tejo o Centro Histórico da Cidade do Seixal será o palco deste estudo onde sé ira estudar a possibilidade de uma restauração da frente ribeirinha local assim como a promoção da qualidade de vida local.The development involves various aspects, in this study will be addressed the thematic of local development based upon Populational renewal in order for a town to development sustainable based on its local potential. Situated on the south bank of of the Tejo the City of Seixal is the stage where this study will explore the possibility of restoring the riverfront site as well as promoting the quality of local life

    A Rede Federal de Educação Profissional e Tecnológica e os Institutos Federais: uma nova institucionalidade

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    This article is based on demonstrating how the Federal Institutes of Education were created, their theoretical premises and the centrality of verticalization in this process. As a result of this scenario, the Federal Institute of Acre was inserted, which emerged in this state of the Brazilian Amazon as the second federal training entity, but with a focus on training specialized labor to work in local society, qualifying them for the market and social action.El objetivo de este artículo es presentar la investigación y análisis de la creación de Institutos Federales de Educación en el país, con énfasis específico en el proceso de centralidad de la verticalización. A través del análisis cualitativo de Actos y documentos institucionales. Como objeto de investigación, el Instituto Federal de Educación, Ciencia y Tecnología de Acre, segunda institución federal del Estado de Acre, con la especificidad de formar profesionales con formación técnico-científica calificada para el crecimiento y desarrollo regional. La subvención para la creación de los Institutos Federales contribuyó de modo significativo para la implementación de la educación profesional y tecnológica en Brasil. Factor impulsor para la integración y expansión de la educación básica y superior, ofreciendo la promoción de oportunidades en docencia, investigación y extensión y la conformación de la población estudiantil acre con conciencia crítica.O objetivo deste artigo é apresentar a pesquisa e análise da criação dos Institutos Federais de Educação no país, com ênfase especifica no processo da centralidade da verticalização. Mediante a análise qualitativa dos atos e documentos institucionais. Como objeto de pesquisa, o Instituto Federal de Educação, Ciência e Tecnologia do Acre, segunda instituição federal do Estado do Acre, com a especificidade na formação de profissionais com capacitação técnica-científica qualificada para o crescimento e desenvolvimento regional. A outorga para a criação dos Institutos Federais, contribuiu significativamente, para a implementação da educação profissional e tecnológica no Brasil. Fator propulsor à integração e expansão do ensino básico e superior, com a oferta da promoção de oportunidades em ensino, pesquisa e extensão e o estabelecimento da população estudantil acreana com consciência crítica

    O USO DE SOFTWARES NO ESTUDO DO CONCEITO DE FUNÇÃO

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    Este artigo trata a respeito do estudo do conceito das funções, destacando o uso de softwares como uma boa ferramenta para a introdução desse assunto, pois observamos que o ensino tradicional tem deixado um pouco a desejar. Ele traz também um pequeno esboço da história das funções, mostrando personagens importantes nesse conteúdo. Frisamos, também, a importância desse conteúdo para a humanidade em diversas áreas e os problemas relacionados com a aprendizagem do conceito das funções. Assim, elaboramos uma pesquisa como forma de obtermos mais uma ferramenta para melhorar o ensino do conceito das funções, com uma turma da 8ª série da Escola Severino Cordeiro de Arruda, onde a turma foi dividida em dois grupos, aplicamos um pré-teste, para analisarmos os conhecimentos prévios dos alunos em álgebra com todos os alunos e realizamos aulas tradicionais com um grupo e com o uso de softwares com outro sobre o conceito de função, onde foram destacadas as variáveis dependentes e as independentes, o domínio de uma função e a definição de uma função. Após as aulas aplicamos um pós-teste para enfim compararmos os resultados e observarmos as diferenças dos rendimentos dos alunos nessas aulas

    Entropy-Based Temporal Downscaling of Precipitation as Tool for Sediment Delivery Ratio Assessment

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    Many regions around the globe are subjected to precipitation-data scarcity that often hinders the capacity of hydrological modeling. The entropy theory and the principle of maximum entropy can help hydrologists to extract useful information from the scarce data available. In this work, we propose a new method to assess sub-daily precipitation features such as duration and intensity based on daily precipitation using the principle of maximum entropy. Particularly in arid and semiarid regions, such sub-daily features are of central importance for modeling sediment transport and deposition. The obtained features were used as input to the SYPoME model (sediment yield using the principle of maximum entropy). The combined method was implemented in seven catchments in Northeast Brazil with drainage areas ranging from 10−3 to 10+2 km2 in assessing sediment yield and delivery ratio. The results show significant improvement when compared with conventional deterministic modeling, with Nash–Sutcliffe efficiency (NSE) of 0.96 and absolute error of 21% for our method against NSE of −4.49 and absolute error of 105% for the deterministic approach.DFG, 414044773, Open Access Publizieren 2021 - 2022 / Technische Universität Berli

    Physically based model for gully simulation: application to the Brazilian semiarid region

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    Gullies lead to land degradation and desertification as well as increasing environmental and societal threats, especially in arid and semiarid regions. Despite this fact, there is a lack of related research initiatives. In an effort to better understand soil loss in these systems, we studied small permanent gullies, which are a recurrent problem in the Brazilian northeastern semiarid region. The increase in sediment connectivity and the reduction of soil moisture, among other deleterious consequences, endanger this desertification-prone region and reduce its capacity to support life and economic activities. Thus, we propose a model to simulate gully-erosion dynamics, which is derived from the existing physically based models of Foster and Lane (1983) and Sidorchuk (1999). The models were adapted so as to simulate long-term erosion. A threshold area shows the scale dependency of gully-erosion internal processes (bed scouring and wall erosion). To validate the model, we used three gullies that were over 6 decades old in an agricultural basin in the Brazilian state of Ceará. The geometry of the channels was assessed using an unmanned aerial vehicle and the structure from motion technique. Laboratory analyses were performed to obtain soil properties. Local and regional rainfall data were gauged to obtain sub-daily rainfall intensities. The threshold value (cross-section area of 2 m2) characterizes when erosion in the walls, due to loss of stability, becomes more significant than sediment detachment in the wet perimeter. The 30 min intensity can be used when no complete hydrographs from rainfall are available. Our model could satisfactorily simulate the gully-channel cross-section area growth over time, yielding a Nash–Sutcliffe efficiency of 0.85 and an R2 value of 0.94.TU Berlin, Open-Access-Mittel – 202

    Determination of the sensitized zone extension in welded AISI 304 stainless steel using non-destructive electrochemical techniques

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    Extension of sensitized zone (SZ) in welded AISI 304 stainless steel was determined by two non-destructive electrochemical tests: double loop electrochemical potentiokinetic reactivation technique (DLEPR) and local electrochemical impedance spectroscopy (LEIS). Welding was carried out using the shielded metal arc with two selected welding energies: the first one (0.7 kJ mm¡1) does not promote the sensitization of the 304 steel and it constitutes the reference sample and the second one (2.2 kJ mm¡1) which leads to the precipitation of chromium carbides in the grain boundaries after the welding process. The non-destructive DLEPR and LEIS tests allowed the length of the SZ to be determined and a good agreement between the two techniques and the microstructure of the two welded samples was shown. The presence of an inductive loop on the local impedance diagrams seems to reflect a galvanic coupling between the weld string (anode) and the welded stainless steel plates (cathode) which will be very prejudicial to a good corrosion resistance of the welded system. The results showed that the two electrochemical tests could be applied in practical cases in industrial field
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