International journal of physical sciences and engineering 2020-09-08T07:40:35+00:00 Joan M.R. Diaz Open Journal Systems <p style="text-align: justify;"><strong>IJPSE</strong>&nbsp;is published in English and it is open to authors around the world regardless of the nationality. It is currently published three times a year, i.e. in&nbsp;<em>April</em>,&nbsp;<em>August</em>, and&nbsp;<em>December</em>.<br>e-ISSN: 2550-6943, p-ISSN: 2550-6951</p> Rare earth ion contribution in barium hexaferrite structure to a change of magnetocrystalline anisotropy to improving its magnetic properties 2020-08-10T06:43:17+00:00 I Gusti Agung Putra Adnyana I Ketut Sukarasa Wisnu Ari Adi <p style="text-align: justify;">Rare earth ion contribution in barium hexaferrite structure to a change of magneto-crystalline anisotropy to improving its magnetic properties has been investigated. A series of simples of Ba<sub>1-x</sub>Ce<sub>x</sub>Fe<sub>12</sub>O<sub>19 </sub>with the variation of x (x = 0.0-0.5) were prepared by solid-state reactions using mechanical deformation techniques. The oxide materials used for sample preparation are BaCO<sub>3</sub>, Fe<sub>2</sub>O<sub>3</sub>, and CeO<sub>2</sub> with the ratio of material used is adjusted to the stoichiometric calculation for variations of Ce<sup>4+</sup> substitution. The phase identification results show that the reaction took place perfectly and successfully formed a single-phase Ba<sub>1-x</sub>Ce<sub>x</sub>Fe<sub>12</sub>O<sub>19</sub> namely at the composition x = 0 and x = 0.1. &nbsp;while for the composition x&gt; 0.1, it is formed in three phases. Particle morphology in the composition x = 0 and x = 0.1 has very good and uniform particle homogeneity across the surface of the sample in the form of polygonal particles. So the substitution of Ce atoms into the barium hexaferrite structure is only able at the composition limit x = 0.1. In the composition x = 0.1 has been able to increase the coercivity and magnetization fields. It can be concluded that the permanent magnet with the composition Ba<sub>0,9</sub>Ce<sub>0.1</sub>F<sub>12</sub>O<sub>19</sub> gives the best results.</p> 2020-08-01T00:00:00+00:00 ##submission.copyrightStatement## Sustainable development and renewable energy sources in milagros community 2020-09-06T06:49:59+00:00 Jean Pierre Mera Bravo Guillermo Antonio Loor Castillo Wilber Manuel Saltos Lenin Agustín Cuenca Alava <p style="text-align: justify;">The exploitation and use of renewable energies have grown significantly, where the volatility of the prices of specific fuels, the fight against climate change, and the search for new business opportunities are many of the causes that have fueled this growth and development. The objective of this research was to carry out an evaluative study on renewable energies and the sustainable development of the inhabitants of rural areas in the province of Manabí. For this, it was necessary to carry out a study of the demand for electricity consumption in the El Milagro community, Riochico parish; Likewise, it was necessary to analyze and evaluate the different renewable energy alternatives, identifying if there are projects of this type implemented in that rural area, based on identifying the area where the system can be installed. The methodology to be applied was bibliographic and field, with techniques for collecting quantitative and qualitative information, textual theory, with exploratory, descriptive, analytical, and prepositive methods of observation, surveys, semi-structured interviews, bibliographic, and data tabulation. The survey was applied as research instruments.</p> 2020-08-31T00:00:00+00:00 ##submission.copyrightStatement## Proposal of photovoltaic system for house 2020-09-08T07:40:35+00:00 Guillermo Antonio Loor Castillo Lenin Agustín Cuenca Alava Wilber Manuel Saltos Arauz Jesús Alberto Pérez Rodríguez <p style="text-align: justify;">In this work, the design project of a photovoltaic system to feed a house is shown, based on a demand study and its general characteristics, the available area for the assembly of the modules, the geographic location, and the meteorological data of the place. With this information, the relevant calculations were carried out to ensure that the installation provides the energy necessary to cover the consumption of the home and, also, delivers the excess energy to the grid. The PVsyst software was used to design the photovoltaic system. To check the advantages of implementing the photovoltaic arrangement, the benefit-cost relationship was evaluated, conducting an environmental impact analysis taking into account the reduction of CO<sub>2</sub> emissions into the atmosphere and the tons of fossil fuel left to burn when generating electricity. With this power source, making it convenient to carry out the installation.</p> 2020-08-31T00:00:00+00:00 ##submission.copyrightStatement##