Modo de acesso: World Wide Web Inclui bibliografia 1. Engenharia 2. Educação.I. Título CDD-620 O conteúdo dos artigos e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva dos seus respectivos autores.

This paper aims to evaluate the diesel oil consumption between 2008 and 2015 in the production of iron ore in Brazil, creating correlations between energy intensity (production), economy and checking the impact of fuel prices on the commodity. During the analyzed period, the years 2008-2009 indicated economic crises, which interfered in the price and the commercialization of iron ore products. The physical intensity was 0.2% higher than the economic intensity. In the period from 2010 to 2014, economic activity remained more stable, with a decreasing trend, mainly due to the increase of iron ore prices. The physical intensity is much higher than the economic intensity influenced by the expansion of the Chinese economy. The year of 2014 indicated the end of the high iron ore price cycle and the beginning of supply and demand stabilization with consequent reduction in prices. In 2015, the market entered the stabilization phase, with a continuous reduction in unit production costs and transportation logistics. There was an abrupt change due to the strong increase of the economic intensity due to the fall of the international prices of iron ore. The diesel oil consumption plays a vital role in the scenario of cost reduction in iron ore production and a deeper analysis must be done in order to discover some options to change the energy matrix.

Humanity's growing long-term energy demand will be the opportunity for new energy generation sources. In this scenario, the use of hydrogen as an energy source has become an interesting alternative to energy production. Besides, the use of fossil fuels can lead to harmful consequences, such as the emission of greenhouse gases. This paper presents the development of a low-cost instrumentation system for monitoring the temperature, current, voltage and gas flow rate of a dry electrolytic cell. Through the electrolysis process, the cell generates a hydrogen-rich gas, which is used as an additive in an internal combustion engine to reduce pollutant gas emissions and primary fuel consumption. The measured variables are presented as a function of the time to analyze the behavior of the electrolyzer. The main advance reported in this work is related to the use of a low-cost sensor for a hydrogen-rich gas flow measurement, which calibration was performed indirectly using a rotameter as a reference. The calibration curve adjusted to the experimental data by linear regression presented a coefficient of determination of 0.9957. Thus, the use of the low-cost sensor is a feasible alternative for measuring the electrolysis gas generated by the cell.

O presente trabalho aborda a relevância do ensino lúdico como forma de ensino-aprendizagem, tendo como base o ensino não-formal, essas formas de aprendizagem viabilizam novos métodos de ensinamento, que contribui diretamente para construção de uma educação mais qualificada e emancipatória, colaborando com o ensino formal. Durante o ano de 2019 mais de 100 alunos circularam pelo centro cultural do bairro Piedade com o intuito em desenvolver alguma atividade, sendo 40 destes com aquisição para o reforço escolar, 26 participaram das oficinas promovida pelo Festival de Inverno. Com isso, ressaltamos a importância do brincar, como forma de ensino para jovens e crianças que frequentam o Centro Cultural, pois, por meio de oficinas e jogos é possível que o aluno desenvolva habilidades como concentração, motivação, coordenação motoras, além de facilitar o entendimento do conteúdo das disciplinas formais. Através do lúdico o aluno expande sua imaginação, aumenta sua criatividade e seu interesse em participar das atividades escolares, contribuindo de forma gradativa para sua autonomia.

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