International journal of physical sciences and engineering
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Telecommunications and virtualization in times of pandemic: impact on the electrical engineering career
Get PDFWith the surprise arrival of Covid-19 at the end of 2019, the course of the world has undergone a 360° change, directly hitting the commercial, business, tourism, and especially the sector educational. This “pandemic” has forced the transfer of classrooms to the homes of students and teachers, bringing with it problems and at the same time solutions to the different aspects and points of their lives outside the student and work environment. Some of these problems lie in personal and family relationships. During all the chaos of the pandemic, Higher Education Institutions have had to adapt to what is known as “virtualization”, leaving aside tasks and face-to-face tasks completely. Thus, a mapping of the strengths and weaknesses of the University sector has been achieved, allowing these strengths to be enhanced to reduce weaknesses and be prepared for the next health emergency. This article tries to highlight the different difficulties that have appeared throughout the migration process from face-to-face to virtual. For this, it has been chosen to carry out surveys to certain students of the electrical engineering career, taking into account their point of view to establish a precedent within the investigation
Obtaining biogas product from biological residues vaccines in Chone city
Get PDFIn this research, we studied the use of cattle biological waste to obtain biogas through a biodigester in the city of Chone, considered the livestock capital of Ecuador. Biogas is a mixed gas produced by the fermentation (anaerobic digestion) of organic materials in the absence of oxygen. It is mostly composed of methane and carbon dioxide. The biogas production process takes place in a container called a digester, in which the anaerobic fermentation process occurs. Obtaining biogas is one of the most used alternative sources for the production of renewable energy, so it can be evidenced by its importance as a tool against the fight of the environmental problem that exists today. The use of biogas of bovine origin has a high calorific value so it can be used for the production of heat, electricity or biofuel. This initiative seeks to manage and sustainably reduce organic waste, reduce the amount of greenhouse gas emitted into the atmosphere and reduce dependence on fossil fuels
Load analysis to solve the daytime demand in a house that is located in "la armenia urbanization" with a sizing of photovoltaic cells connected to the grid
Get PDFIn this article a load analysis is carried out that is capable of solving the daytime demand for a home in the La Armenia urbanization of the Conooto parish belonging to the Quito canton, with the sizing of photovoltaic cells connected to the grid, seeking to reduce the environmental impact and the cost in terms of electricity generation. The sun is considered as the main resource that contributes to the generation of electricity, since the sun spills enough energy on the planet, if it is used efficiently, we could produce 400 times more than what is currently generated. The sector in which the study is carried out generates 4.16 kWh of solar energy on a daily average, with the use of this energy we could satisfy the daytime consumption of the house; A design of a grid connection photovoltaic generation system will be carried out in the form of distributed generation to satisfy the demand of the house during daytime hours
Impact of distributed generation in the electrical system of Ecuador
Get PDFDecentralized generation today assumes a very important role in the stability of electric power, especially in rural areas where electric power supplied by large Power plants, is delivered to points of consumption with a poor quality of energy this due to the distance that is found, from the generation to the final consumer, the implementation of the GD is directly related to the increase in the quality of electric energy as well as providing flexibility to the electrical distribution system. The deployment of distributed generation in electricity distribution networks can potentially increase their reliability and reduce the cost of power, by installing energy sources closer to the demand or consumption points. This type of generation involves a great variety of energy sources, such as; wind, solar, hydraulic, fossil fuels, biomass, among others
The linearity of x-ray devices radiation output and its relationship with patient thickness
Get PDFUtilization of X-rays in the medical field is one way to improve public health. X-rays are one of the applications of radiation for radio diagnostics. X-ray examination using X-rays can provide information about the human body without the need for surgery. In the use of radiation technology it is realized that in addition to its use for radio diagnostics, X-rays harm the environment and living things around them, especially radiation workers. The impact that can result in cancer due to the accumulation of radiation dose exposure received by the body exceeds the specified threshold dose. Therefore safety standard guidelines that contain basic requirements for quality control (Quality Control -QC) must be obeyed. One of the test activities included in the QC program is the linearity test of X-ray radiation output
Design and construction of a cold production simulator system: chiller
Get PDFThe design and construction of a cold production system from the ice water submitted by a mechanical direct expansion system contributing to the development of knowledge in the area of air conditioning were carried out. Among the technical design parameters, a direct expansion system with cooling capacity of 9000 BTU/Hrs, R134 refrigerant gas to a turbine for the work of the Fan Coil of ½ Hp of force 220 V was selected, as was the fan motor of the cooling tower as fundamental means for heat transfer. The recirculation pumping system is carried out by pumps of 0.37 kW of power and a maximum flow of 40 l/min. For both the evaporator sump (cold) and the condenser sump (hot). The work stage is given in two independent circuits, the Fan Coil system is connected to the evaporator sump and the cooling tower, in turn, is connected to the condensation system for proper operation and achieve condensation temperatures of 35 ° C and in case of having water requirements in the cold sump, the tower is connected by means of an electromagnetic valve for its supply
Design of eco-friendly refrigeration system
Get PDFThe present study of a freezing system has developed based on an air conditioning system, whose purpose is to take advantage of the technological transfer of cold producing equipment for food storage and conservation uses. The installed capacity of 9000 BTU/Hr was considered for the choice of equipment. We studied the freezing process of fish, water, and the preservation of legumes with a volume of 1 kg per product individually. The freezing temperature has evaluated with a mechanical compression refrigeration system of Gas R22 with temperature interactions of 29.6 ° C to -12 ° C. and monitored with a Proportional Integrative Derivative (PID) controller. For production cost, the equipment was mostly made of its parts and pieces with recycling material. A descriptive experimental design has carried out, for the verification of results. The equipment managed to reach chamber temperatures of -13 ° C from 20 minutes once the equipment (compressor) has turned on under specific product descriptions
The brain and its role on learning process
Get PDFThis article provided a brief analysis of an important human organ and the influences it has on personal and formal learning in the educational field. The specific topics that were investigated are the brain and its importance in learning, characteristics of the hemispheres of the brain learning and the contribution of neuroscience in the teaching-learning process. The first topic mentions how the brain influences learning and the role of memory in that process. The next topic focuses on the characteristics and functions performed by the two brain hemispheres. The latest content deals with the contribution of neuroscience in the educational field, here is detailed on how neural networks combined with the environment where the student performs to make learning possible. The descriptive methodology, based on the review of current bibliographic sources, was used. The purpose of this document is to provide the reader with true and up-to-date sources of information on an organ that integrates complex and necessary ideas for the human being
Comparative Study on NDVI with RVI for Estimated Area and Class Distribution
Get PDFThis study aims to determine the differences and comparison of the results of the estimated area, the distribution of clove vegetation using the Normalized Difference Vegetation Index (NDVI) and Ratio Vegetation Index (RVI) and to choose a vegetation index that is more suitable for clove vegetation analysis in Buleleng district, Bali. The method used is to compare statistically descriptive area and distribution class produced by the NDVI and RVI models with area data from the Forestry and Plantation Service (FPS), Buleleng regency, Bali in 2014, amounting to 7622.32 ha. The estimated area of ??clove vegetation by the NDVI model was 7852.68 ha and the RVI model was 7669.44 ha. There is an estimated difference in the area of ??clove vegetation of 183.24 ha and a difference in the broad class category of 2453.85 ha for the Rare class (NDVI > RVI) category, for the Medium class of 1611.45 ha (RVI > NDVI), and for the Dense class of 659.16 ha (RVI > NDVI). Comparison of the area with FPS data obtained 97.07% for the NDVI model and 99.39% for the RVI model. This shows that the RVI model vegetation index is more suitable for use in the estimation of the area and class of clove vegetation distribution in Buleleng regency, Bali
Technical-economic impact of low voltage secondary lines to pre-assembled
Get PDFDistributed generation is understood as all those sources of electrical energy that are connected in the electricity distribution networks. These distribution networks have been planned with wide operating margins, which together with the characteristic that energy flows are unidirectional (from the substation to consumers) allow them to be operated passively. This means that they are not subject to constant monitoring of the network status variables (ie voltages, flows), so these networks are managed with little supervision since that is more economical. The objective of this research is to investigate the economic impact that is presented within the university for a better presetting in the low voltage lines for them, the causes and effects that can be committed when installing them have been investigated, in addition to making a bibliographic review of how in other countries and within our city Portoviejo is distributed in low voltage and its consequences or benefits