Enfoque UTE

pp. 1 - 28

Authors: Laura Stefany Velásquez-Quispe, Carlini Alberto Ortiz-Meza, Ulises Gonzalo Calizaya-Mamani, Andrea Alejandra Zapana-Calderón, Gabriela Cristina Chire-Fajardo

The current COVID-19 pandemic is a disease that affects everyone. The Peruvian government has promoted the use of physical barriers; however, the immune system is an important defense against the virus that has not yet been motivated. The objectives were: to know the COVID-19 disease and its behavior; to know the nutritional diet of the population; to define the population at risk and to make food proposals in time of pandemic in Peru. For this, we used the information sources of scientists and science institutions. The results were: the main characteristics of the disease and its effect on the population at different ages and risk groups; described the feeding in six different regions of Peru, showing high simple carbohydrate intake and unbalanced nutritional energy, identified the nutrients of the biodiversity resources; defined the population with the risk; presented a diet for patients at home, those in critical condition and those who passed the disease; as well as general recommendations to the population that includes a comprehensive energy to achieve a healthy life. Culminates highlighting the importance of the role of the Peruvian State to promote a healthy life for the population.

pp. 45 - 57

Authors: Fabian Salazar, Maritza Núñez, Julio Cuji, Carlos Gordón

This article develops the literary review of the architectures of energy harvesting systems, identifying parameters such as: frequency, type of antenna, architecture (elements), among others. The methodology has four stages: a) Search for documentation, 10 systems were obtained, which were designated with the letter "S" accompanied by the article number; b) Reading of scientific documents; c) Extraction of information and architecture of the systems, where the stages of each system are detailed (which vary from 2 to 4), the working frequencies (300 KHz to 3.43 GHz, 2.45 GHz being the most used in systems for collecting radio frequency energy). In addition to using in certain systems, multiplier and rectifier circuits in different configurations: half wave, full wave; to later be stored in batteries or directly applied to devices; d) Documentation of the information extracted. Finally, after completing the literary review, it was observed that, in most articles, the systems have 3 stages: antenna, coupling, and rectification that transforms the received energy (alternating current) into direct current, their operation varies in frequency intervals of 1.8 to 2.4 GHz depending on the configuration of each system. Likewise, the product obtained is a consultation APP, with a selection menu of the different architectures investigated, which is a very beneficial contribution for researchers who wish to work in this area.

pp. 76 - 87

Authors: Miguel Angel López Ramírez, Olaya Pirene Castellanos Onorio, Fabiola Lango Reynoso, María del Refugio Castañeda Chávez, Jesús Montoya Mendoza, Cinthya Alejandra Sosa Villalobos, Benigno Ortiz Muñiz

Every year millions of cubic meters of wastewater are discharged into water bodies, which are treated in an inadequate way, these procedures being inefficient to achieve what is required by law or for use within industrial processes. In these cases, and due to the scarcity of water, the use of advanced oxidation processes is being used as an alternative treatment, which are based on physicochemical processes capable of producing profound changes in the chemical structure of pollutants, involving the generation and the use of transitory species with great oxidizing power, mainly the hydroxyl radical, which can be generated by photochemical means or by other forms of energy, and is highly effective in the oxidation of organic matter. This review aims to perform an analysis of the influence of treatments on the decontamination process.