Sorghum is of significant economic importance for Northeastern Brazil, since it exhibits high growth rates in regions with irregular rainfall distribution and high temperatures, and is an alternative to corn, which has greater water requirements. Despite being a traditional crop in the region, there are few studies on irrigation management in the Apodi plateau. The aim of this study was to determine the evapotranspiration of the crop and the crop coefficient (Kc) for the different stages of sorghum growth in two cycles, and establish the relationship between the Kc and the normalized difference vegetation index (NDVI) obtained by radiometry. Two weighing lysimeters were used to estimate crop evapotranspiration (ETc). Reference evapotranspiration (ETo) was estimated by the Penman-Monteith method (FAO) and the crop coefficient determined using two methodologies: simple Kc and dual Kc. Total crop evapotranspiration in the two cycles was 452 and 557 mm. The ETc value was 23% higher in the second cycle compared to the first. The maximum Kc values for the first and second cycles were 1.21 and 1.35, respectively, using the dual Kc methodology. The linear relationship found between the Kc values and the NDVI allows monitoring and estimating the water requirements of the crop.

A hydrological model is one of the tools developed by science to better understand and represent the behavior of the river basin. The IPH2 model aims to use it for projects in urban and rural basins. It is a model that uses few parameters and it is based on known methodologies. The objective of the research was to analyze the hydrological flow behavior in the Poxim Açu River sub-basin through modeling with the IPH2 model, as well as to model the flow of the Poxim River basin with a model that does not require a lot of input data and to calibrate the IPH2 model for the studied basin. After the automatic and manual calibration phases, parameters for hydrological simulation were found. After the simulation, the value found for NSE was 0.73 for the coefficient of determination (RSR) the value generated was 0.74, PBIAS found after calibration was-7.44, the value of the RMSE was 0.95, and the RSR value found was 0.07. According to the results of the present study, it was possible to conclude that the calibration process for the flow behavior of the Poxim-Açu River basin responds positively to what the literature considers satisfactory.

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Atualmente, é crescente a demanda por profissionais qualificados, sobretudo para ocupação de postos ligados às Engenharias. No Brasil, a oferta de tais profissionais constitui um gargalo que tem dificultado o crescimento econômico brasileiro. Assim, o governo brasileiro tem desenvolvido ações para expansão da educação tecnológica. Entretanto, vários estudos têm evidenciado que os índices de evasão no ensino superior são significativos e de causa multifatorial. Isto posto, é importante que sejam investigados os índices de evasão e a identificação dos fatores causadores da evasão no âmbito das diversas instituições e cursos. Dessa forma, esse artigo apresenta os números relativos às taxas de evasão discente a partir do Curso Superior de Tecnologia (CST) em Automação Industrial do IFS/Campus Lagarto e identifica algumas motivações. Dessa forma, esse trabalho contribui com indicadores para orientar políticas internas para redução das taxas.