Mario Chauca - Academia.edu (original) (raw)

Papers by Mario Chauca

Vaccines

Introduction: Socioeconomic factors have been recognized by the WHO as determinants of health, an... more Introduction: Socioeconomic factors have been recognized by the WHO as determinants of health, and it is important to consider these factors in decision making to curb existing inequality in vaccination for SARS-CoV-2, which causes COVID-19. Objective: We aimed to determine whether there is a correlation between socioeconomic factors and vaccination worldwide and measure inequality. Method: A study of secondary sources was carried out to assess inequality in vaccination against COVID-19 worldwide and its association with socioeconomic factors. For this assessment, 169 countries were chosen from January 2020 to March 2022 using LibreOffice and JASP 0.16.1.10. Several mathematical models and statistical tests were used, including a normality test, an analysis of frequencies and proportions, a Kruskal–Wallis test, Spearman’s correlations, a Lorenz curve, a Concentration Index, and a slope. Results: Correlations were found between socioeconomic factors and vaccination with one, two, and...

Proceedings of the 2017 International Conference on Cloud and Big Data Computing, 2017

This article offers a new alternative to buy at vending machines. The system will have a software... more This article offers a new alternative to buy at vending machines. The system will have a software where the customer will log to get access to a virtual list of products of the different vending machines that the user chooses; In addition to this, a money record will be enabled for the respective client, it means client can charge money per month or whenever he wants. The client, once registered in the application, will be able to buy the desired product. Or in case the product is not found, the machine will show a map to the nearest point of supply.

2022 8th International Conference on Education and Training Technologies

2019 IEEE Sciences and Humanities International Research Conference (SHIRCON)

In this work it is presented and evaluated two strategies to achieve the optimization of the vari... more In this work it is presented and evaluated two strategies to achieve the optimization of the variance of delay in nanoelectronic digital circuits, taking into account the variations due to the manufacturing process. The evaluations of both strategies are developed through applications in 8 ISCAS circuits. The results show comparisons in percentage changes in the variances of delay time and power consumption on each circuit because of applying these two strategies. In this article, the results are presented in full form for all tested circuits. One of the strategies is called ONE TRACK and the other TRACKING. The first uses the LaGrange method with Karush Kuhn Tucker's theorem and the second develops a progressive resizing, increasing the width of the critical gates in discrete steps of constant value as far as restrictions allow. During the application of the procedure, the total state of the circuit is evaluated in each step. In both strategies, the variance of the delay time is optimized with restriction of the area used and the power consumed is calculated. The results are presented in tabular and graphical form. Finally, conclusions and observations from the study are issued. The codes are implemented in C++ and it is used a 65 nm technology.

Journal of Physics: Conference Series

The objective of this research was the characterization of modified PID controllers to improve th... more The objective of this research was the characterization of modified PID controllers to improve the response time of direct current (DC) motors. The Degem System EB-109 experimentation module (includes DC motor and six-pole pair synchronous motor), Tektronix TDS 2012 oscilloscope, Fluke 175 multimeter and a simulation environment for block diagrams with Simulink software were used. The procedure began by making voltage and current measurements in the armature of the DC motor in order to calculate its mechanical-electrical constants and obtain its mathematical model. Then, using block diagrams, a closed-loop control system was designed for the DC motor, using the PID as a control block in a first phase, and then in a second phase, the modified PID. The system was analyzed with simulation software and the results of both phases were compared. With the modified PID controller, a better speed and stability response time was obtained, thus eliminating transient peaks.

Journal of Physics: Conference Series

The purpose of this research work is to predict failures in power transformers based on oil chrom... more The purpose of this research work is to predict failures in power transformers based on oil chromatographic analysis and thus improve their reliability and avoid further deterioration of equipment and untimely service outages. The research is basic, descriptive, correlational level, and an experimental design. The sample consisted of 3 transformers corresponding to a company in charge of the distribution of electrical energy in the coastal area of Peru, different techniques were used such as the characteristic gas methods, from Dornemburg, from the Rogers relationships, from the total gases fuels. From the analysis of these samples, the gas content presented by the transformers was related to the faults presented by the equipment. The values found were compared with the maximum levels allowed using the key gas method. In this way, they were related to the conditions and the possible causes of breakdowns that could occur. We conclude that gas chromatography analyzes the oil that is c...

2021 9th International Conference on Information and Education Technology (ICIET)

The study aimed to determine the risk factors in tutoring and dropout in students in a public uni... more The study aimed to determine the risk factors in tutoring and dropout in students in a public university methodology: hypothetical deductive, type and quantitative, descriptive and cross-sectional design. The sample consisted of 105 students from the 1st to the 8th semester 2018–2019. 95% female predominance, internal tutoring risk factors are present as motivation only in 48%, self-esteem 38%, food 49%, external factors such as aggression 57%, teacher support 15%, the use of the Web without filter the 85 % they are present. The results of the research led us to conclude that internal and external risk factors are present in the tutoring and dropping out of students.

Journal of Communications

Besides the increase of mobile communication services and providers in Peru, base stations (BS) h... more Besides the increase of mobile communication services and providers in Peru, base stations (BS) have grown greatly without considering their visual impact. The characterization and evaluation of the visual impact from base stations to urban landscapes was carried out in the district of San Miguel, located in Lima, Peru. This district has a number of base stations suitable to conduct a pilot study. National and international regulations in force were reviewed, and the Manual for Camouflage of Radio Stations from Bogota DC, Colombia, was chosen as the basis for the visual impact evaluation. Then, a field study of mobile base stations located in the district of San Miguel was accomplished. After that, the matrices for evaluating the visual impact to each of the BS were applied. According to the evaluation, 12 BS (20.3 %) have a low visual impact, 42 BS (71.2 %) have a medium visual impact, and 5 BS (8.5 %) have a high visual impact. So, more than 90 % of the BS in San Miguel has low or...

Proceedings of the 4th International Conference on Medical and Health Informatics, 2020

Globally we are going through a difficult situation due to this pandemic due to COVID-19, one of ... more Globally we are going through a difficult situation due to this pandemic due to COVID-19, one of the most effective measures implemented by most governments has been social isolation, which can cause psychosocial risk; The objective of this study is to evaluate the psychosocial well-being of the students of a Peruvian public university during the 90 days of social isolation; the method we have used is descriptive - cross-sectional, with a non-probability sample of 285 university students, who filled out an online survey to detect psychosocial symptoms, using the General Health Questionnaire (GHQ-28); finding that 72.6% of students exposed to a medium-high level of psychosocial risk. In conclusion, an association was found between a medium-high level of psychosocial risk and the variables: cohabiting with people at risk for COVID-19 (Xi2 = 9,661 and p <0.05); present symptoms compatible with COVID-19 19 (Xi2 = 28,957 and p <0.05) and cohabit with COVID-19 patients (Xi2 = 8,803 and p <0.05).

2021 5th International Conference on Medical and Health Informatics, 2021

To determinate a retrospective analysis of multidrug-resistant pulmonary tuberculosis associated ... more To determinate a retrospective analysis of multidrug-resistant pulmonary tuberculosis associated with risk factors in a marginal urban district Design: The type of research was observational and analytical, retrospective case and control. The sample consisted of 40 cases diagnosed with MDS TB by Sensitive Test; for each case, two controls were considered that were people who live in the same district, with a smear-positive diagnosis of pulmonary tuberculosis, pansensitives, that is, 80 controls with FP-TB. The data collection technique was the survey and the instrument, a questionnaire for both groups (cases - controls). Results: Six internal and external risk factors associated with MDR TB were identified. The internal risk factors associated with MDR TB were: previously receiving one or more treatments for tuberculosis, consumption of drugs before having pulmonary TB and presence of a higher bacillary load in the BK result and pretreatment (p < 0.05) culture (+++). The external risk factors associated with MDR TB were:contact with a family member with MDR TB; contact with friends or neighbors who died from TB and contact with someone with MDR TB outside the home (p < 0.05). Conclusion: The Factors: “Presence of a higher bacillary load in the BK result and pretreatment culture (+++)” and “Contact with someone you know with MDR TB outside the home” are more significantly associated with MDR TB, if the incidence of these risk factors can be controlled, the progression of tuberculosis can be stopped.

2018 World Engineering Education Forum - Global Engineering Deans Council (WEEF-GEDC), 2018

This project integrates two important methodologies in teaching and learning; Edgar Dale's me... more This project integrates two important methodologies in teaching and learning; Edgar Dale's methodology of action-based learning, giving emphasis to active part and Hermann Ebbinghaus methodology of successive repetitions to improve the forgetting curve, this applied in research to the elaboration and publication of research articles developing embedded projects and startup. The integration of the two strategies under criteria of quality, motivation, law of attraction and the use of a positive language focused for a learning with relevance for the engineering of peace, applied in last year students of Engineering in a public university of Peru, determined favorable effects in significant level. The level of results improved remarkably, reaching over 80% of qualified works in reviews for events with publications indexed in prestigious databases such as Scopus, as well as in journals.

2021 4th International Conference on Education Technology Management, 2021

This article focuses on the development of learning in university students focused on a process o... more This article focuses on the development of learning in university students focused on a process of change willing to take on the challenges of disruptive education by incorporating the intensive use of digital tools replacing traditional learning; since disruptive education must be reflected in educational practices that improve learning processes. From this perspective, it is important to ask: How does disruptive education influence the use of digital tools in students of the first cycle period 2021 at the National University of San Martín? The objective of the research was: To measure the influence of disruptive education on the use of digital tools by I cycle students in the period 2021 at the National University of San Martín. The study was of applied type. The sample consisted of 182 students from the 1st cycle of the National University of San Martin. The methods used in the research were: induction, deduction and analysis. In the process of implementation and execution of the research, it was possible to strengthen the capacities of the students in the use of digital tools in the development of their academic activities by interacting in the forum, questionnaire and task responding to the current context of virtuality. Evidenced in the hypothesis test: Disruptive education produces significant effects in the use of digital tools in the students of the I cycle in the period 2021 of the National University of San Martín.

Advances in Science, Technology and Engineering Systems Journal, 2021

To determine the risk factors associated with the development of extensively resistant pulmonary ... more To determine the risk factors associated with the development of extensively resistant pulmonary tuberculosis in the DIRIS Lima Sur, 2017. The type of research was observational, quantitative, analytical, retrospective case-control approach. The population consisted of 158 patients with MDR-TB treatment schedule between 2016 and 2017. The sample consisted of 24 cases diagnosed with extensively drug-resistant pulmonary tuberculosis (XDR-TB) and 48 controls with MDR-TB. The survey was used for both groups (cases-controls) as a data collection technique and a questionnaire as an instrument. 5 risk factors associated with XDR-TB were identified. Among the internal factors associated at the bivariate level were: drug use, previous history of MDR-TB/TB treatment, having taken MDR-TB treatment for less than one year, history of failure to primary and individualized scheme for MDR-TB/TB (p<0.05); and the multivariate analysis confirmed the influence of the factor "history of failure to primary and individualized scheme for MDR-TB/TB". Among the external factors most associated at the multivariate level were: having a history of family contact deceased by XDR-TB/MDR-TB and extra domiciliary contact in the neighborhood deceased by TB (p<0.05) It was concluded that the factors associated with the development of extensively resistant tuberculosis are "failure to follow the primary and individualized MDR-TB regimen" and "history of deceased family contact with XDR-TB-MDR-TB".

International Journal of Information and Education Technology, 2021

This article develops the proposal of a disruptive innovation in learning methodologies based on ... more This article develops the proposal of a disruptive innovation in learning methodologies based on active activity through digital transformation. The vertiginous changes that have taken place a few decades ago with respect to the advancement of knowledge and technology, encompass educational processes. Traditional teacher-centered teaching has led to student-centered learning, seeking to develop the skills necessary for performance beyond the professional field. There are tools or supports based on current knowledge that can set trends in the educational process. The portable tool for universities to quickly and up-to-date access to information are digital devices, the use of which is becoming popular in education.

Proceedings of the 5th International Conference on Mechatronics and Robotics Engineering - ICMRE'19, 2019

The contradictory evolution of water services is imbedded in a wide variety of shortcomings that ... more The contradictory evolution of water services is imbedded in a wide variety of shortcomings that characterize contemporary urban development. The purpose of the following document is to propose a solution for water scarcity in arid and semi-arid zones by predicting wind direction. This proposal is based on the application of a monitoring system with LoRaWAN that will track areas with high concentration of water, using humidity sensors and anemometers in a swarm of drones. These data are stored in a registry so that, after completing their route, they are sent to a central node and this information remotely and used to locate the fog catchers in areas with great potential for liquid extraction.

International Journal of Innovation, Management and Technology, 2022

This article has to relate invisible discrimination with diversity in students in university clas... more This article has to relate invisible discrimination with diversity in students in university classrooms, whose variable is invisible in nature, with tendencies to distort objective reality, thus causing discriminated young people to have socio-emotional instability in their lives. Quantitative, descriptive correlational study and due to the sensitivity of the subject, a non-probabilistic sample was taken for convenience of 290 students from the different academic programs; The data collection instrument was a questionnaire, the results were found using Pearson's Correlation Coefficient, which indicates that there is a partial relationship between diversity and invisible discrimination (p = 0.45).

Proceedings of the 18th LACCEI International Multi-Conference for Engineering, Education, and Technology: Engineering, Integration, And Alliances for A Sustainable Development” “Hemispheric Cooperation for Competitiveness and Prosperity on A Knowledge-Based Economy”, 2020

The research analyzes the application of actionbased teaching strategies in undergraduate student... more The research analyzes the application of actionbased teaching strategies in undergraduate students in a public university, focused on the development of electronic engineering projects with the writing and publication of research articles in prestigious databases. The researching focused considering active action (use of photos, videos, discussion with an expert and exhibitions) in a positive environment: positive thinking and language. The study shows fundamental aspects to raise the level of interest and performance of the students reaching over 90% of reception of letters of acceptance in international events indexed in Scopus.

Proceedings of the 17th LACCEI International Multi-Conference for Engineering, Education, and Technology: “Industry, Innovation, and Infrastructure for Sustainable Cities and Communities”, 2019

The Cobriza underground mine, for the development of its operations, has an electric power distri... more The Cobriza underground mine, for the development of its operations, has an electric power distribution system, in which transformers submerged in 69 kV and 10 kV oil play a vital role in the reliability of the service; even more considering that a large part of them have been working for more than 38 years, it is necessary to know the status of their condition, to attend to their extensions, to optimize their life cycle and to make medium and long-term decisions to prioritize investment needs. a maintenance, relocation or replacement. For this purpose, we will use the concept called: Health Index, which consists of the combination of the relevant data obtained from the analysis of samples of the transformer insulation system and with the support of fuzzy logic using the software tool tool. Matlab, we will find a numerical value, which reflects the current health status of the transformer. The basic concepts of the fuzzy logic associated with the Health Index, the revision of the regulations in force, as well as the method of calculation are explained in a summarized form. For the application of the proposed method, we have considered real data from ten transformers that are currently working in the Cobriza mine, whose results are consistent with other similar works in this regard; In addition, an interface is designed to facilitate the application of the proposed method.

Journal of Physics: Conference Series, 2021

Due to the great demand for energy, electrical power systems, when subjected to voltage stress, p... more Due to the great demand for energy, electrical power systems, when subjected to voltage stress, present voltage instability, generating blackouts in the system with economic losses and in the components. Through a static approach, the P-V and Q-V curves are widely used in operation studies, planning that allow us to detect the weakest bus in the system to obtain the exact location in which to connect the SVC to compensate with reactive power in order to have system voltage stability. Through this article, we evaluate a voltage stability study on the IEEE-9 bus with the Dig-Silent Power Factory 2020 program in order to compensate the system with reactive power.

2020 7th International Conference on Bioinformatics Research and Applications, 2020

The research favors characterizing how the occupational risks of health personnel are perceived a... more The research favors characterizing how the occupational risks of health personnel are perceived and the association with the use of personal protective equipment in Covid-19 in a public hospital, where in this time of pandemic, occupational risks are characterized and how they influence in the use of personal protective equipment (PPE), the versatility of suppliers in creating new protection elements. The objective was to determine the relationship between perception of occupational risks and the use of personal protective equipment in covid-19 in health personnel. The methodology was a correlational study, with a quantitative approach. As instruments, the occupational risk assessment of health personnel and the level of personal protective equipment were used; applied to a sample of 30 (health personnel) from a public hospital. The results were the findings perceived by health personnel. When evaluating correlation using Spearman's R, a significant relationship was found between the level of occupational hazards and the use of personal protective equipment (r = 0.498; p≤0.001). The conclusions were that there is a positive and significant relationship between the perception of occupational risks and the use of personal protective equipment in the health personnel of a public hospital. The usefulness was to demonstrate the influence of occupational health risks, it is important to develop new designs in the use of personal protective equipment. This helps health personnel with better protective equipment.