Analysis of the Impact of the Health Emergency Due to Covid-19 on New Students 2019-2022, Taking the Subject of Differential Calculus as a Case Study

Los resultados obtenidos en el Tecnológico Nacional de México/Instituto Tecnológico de San Luis Potosí (TecNM/ITSLP), en relación al porcentaje de acreditación así como a desempeño académico en el primer semestre del año 2020, sobrepasan todos los porcentajes de años, en particular de semestres anteriores y posteriores, es posible observar un contraste muy marcado y significativo, nuestro estudio en particular, se refiere (para la asignatura de Cálculo Diferencial) a la comparación de acreditación y desempeño académico antes de la declaración de la pandemia debida al COVID-19, en plena emergencia sanitaria por la declaración de la pandemia, al regreso escalonado al aula escolar y regreso total del personal escolar. En la temporada de aislamiento sanitario, los estudiantes adquirieron características particulares que contribuyeron al aumento de los promedios y la acreditación, estas características podrían tener implicaciones prácticas y pedagógicas para mejorar la enseñanza y el aprendizaje en situaciones similares en el futuro. Entre los resultados se observa en el año 2019 un porcentaje de acreditación del 40 %, aumentando a casi el doble para el 2020 (exactamente con un 86 %) el cual es el año cuando se declara emergencia sanitaria en relación al COVID 19, para el año 2021 el porcentaje de acreditación disminuye al 81 %, y para el año 2022, disminuye un poco más para llegar a un 73%, este comportamiento es posible visualizarlo con apoyo gráfico, el cual, realizando con apoyo del programa Origin 2019b, un ajuste polinomial, el cual nos representa un polinomio cúbico, dado por:  y=4.73x3-49.28x2+158.89x-78.14The results obtained at the Tecnológico Nacional de México/Instituto Tecnológico de San Luis Potosí (TecNM/ITSLP), in relation to the percentage of accreditation as well as academic performance in the first semester of 2020, exceed all percentages of years, in particular from previous and subsequent semesters, it is possible to observe a very marked and significant contrast, our study in particular refers (for the subject of Differential Calculus) to the comparison of accreditation and academic performance before the declaration of the pandemic due to COVID-19. In the midst of a health emergency due to the declaration of the pandemic to the staggered return to the school classroom and total return of students. In the season of health isolation, students acquired particular characteristics that contributed to the increase in averages and accreditation; these characteristics could have practical and pedagogical implications to improve teaching and learning in similar situations in the future. Among the results, an accreditation percentage of 40% is observed in 2019, increasing to almost double by 2020 (exactly with 86%), which is the year when a health emergency is declared in relation to COVID 19, for the In 2021, the accreditation percentage decreases to 81%, and by 2022, it decreases a little more to reach 73%. This behavior can be visualized with graphic support, which, with the support of the Origin 2019b program, makes an adjustment polynomial, which represents a cubic polynomial, given by: y=4.73x3-49.28x2+158.89x-78.1

Análisis de los Resultados en el Desempeño Académico en la Materia de Calculo Diferencial, Después del Impacto de la Emergencia Sanitaria por Covid-19, en Estudiantes de Nuevo Ingreso en el ITSLP, Año 2022

For the Differential Calculus subject of the Tecnologico Nacional de México/Instituto Tecnologico de San Luis Potosí (TecNM/ITSLP), the objective of the study, was to analyze the impact of the health emergency due to COVID-19, in the academic performance of new students in the year 2022 of the ITSLP, contrasting the grade obtained on the platform (homework and pre-exam) with the grade obtained in the written in-person exam. The analysis of the results shows that new students (who took the Differential Calculus subject, after having completed their entire upper secondary education online, derived from the impact caused by COVID-19) according to the weights for accredit the course: homework 40%, pre-exam 10% and exam 50%, observing as a case study two units of greatest interest, the first unit (first evaluation in which real numbers are reviewed) and the fourth unit (where the reviews the most important of the subject, derivatives), choosing two different Engineering careers, offered at the Institution, which were Business Management Engineering (BME), and Computer Systems Engineering (CSE). The results obtained allow us to conclude for both Engineering careers, for unit 1, a better use of homework and pre-exam carried out on the Moodle platform, than that carried out in the exam, for unit 4, the 3 items (pre-exam, homework and exam) were online, where the best used item was the pre exam, the exam and the homework were of similar magnitude.Para la materia de Cálculo Diferencial del Tecnológico Nacional de México/Instituto Tecnológico de San Luis Potosí (TecNM/ITSLP), el objetivo de estudio, fue analizar el impacto de la emergencia sanitaria por COVID-19, en el rendimiento académico de estudiantes de nuevo ingreso en el año 2022 del ITSLP, contrastando la calificación obtenida en plataforma (tareas y pre examen) con la calificación obtenida en el examen presencial escrito. El análisis de los resultados muestran que los estudiantes de nuevo ingreso (que cursaron la materia de Cálculo diferencial, después de haber transcurrido la totalidad de su educación media superior en línea, derivado del impacto que ocasionó el COVID-19) según las ponderaciones para acreditar el curso: tareas 40 %, pre examen 10 % y examen 50 %, observando cómo caso de estudio dos unidades de la materia de mayor interés, la primera unidad (primera evaluación en la cual se revisan los números reales) y la cuarta unidad (donde se revisa lo más importante de la materia, derivadas), eligiendo dos carreras diferentes de Ingeniería ofrecidas en la Institución, las cuales fueron: Ingeniería en Gestión Empresarial (IGE), e Ingeniería en Sistemas Computacionales (ISC). Los resultados obtenidos permiten concluir que, para ambas carreras, para la unidad 1, un mejor aprovechamiento en tarea y pre examen realizados en plataforma Moodle, que el realizado en el examen, para la unidad 4, los 3 rubros (pre examen, tareas y examen) fueron en línea, donde el rubro mejor aprovechado fue el pre examen, por otro lado, el examen y las tareas tuvieron una magnitud similar.&nbsp

Comparative analysis of the academic performance of the propaedeutic course and the online leveling course, in the Covid-19 period, in newly admitted students to a higher education institution, in the year 2021

En el Tecnológico Nacional de México/Instituto Tecnológico de San Luis Potosí (TecNM/ITSLP), como parte del proceso de admisión y con el objetivo de fortalecer los conocimientos previos de educación media superior en la ciencia de las matemáticas, se ofrecen dos cursos; uno de ellos es llamado curso de nivelación y el otro es llamado curso propedéutico. Aunque ambos abordan los mismos temas, difieren en el tiempo en que se desarrolla el curso. Estos cursos, tradicionalmente presenciales, se adaptaron a la modalidad en línea en 2021, debido a la pandemia de Covid-19, utilizando la plataforma Moodle para tareas y evaluaciones. El objetivo de este trabajo es analizar el rendimiento académico de los estudiantes en ambos cursos. Se empleó una metodología mixta (cualitativa-cuantitativa) con enfoque descriptivo, diseño no experimental y alcance transversal. El principal resultado indica que el curso propedéutico, con una duración de tres meses, es más eficaz en comparación con el de nivelación, que tiene una duración de cuatro semanas, este hallazgo sugiere que la duración del curso es un factor crucial. Se identificaron temas comunes de dificultad para los estudiantes, y se observó un mejor rendimiento en el curso propedéutico, donde los estudiantes obtuvieron un promedio general de 22.8 en el examen diagnóstico y un promedio general del 76.11 en el examen final.At the Tecnológico Nacional de México/Instituto Tecnológico de San Luis Potosí (TecNM/ITSLP), as part of the admission process and with the objective of strengthening prior knowledge in upper secondary education in the science of mathematics, two courses are offered; One of them is called a leveling course and the other is called a propaedeutic course. Although both address the same topics, they differ in the time in which the course takes place. These courses, traditionally face-to-face, were adapted to the online modality in 2021, due to the Covid-19 pandemic, using the Moodle platform for assignments and evaluations. The objective of this work is to analyze the academic performance of students in both courses. A mixed methodology (qualitative-quantitative) was used with a descriptive approach, non-experimental design and transversal scope. The main result indicates that the propaedeutic course, with a duration of three months, is more effective compared to the leveling course, which has a duration of four weeks, this finding suggests that the duration of the course is a crucial factor. Common themes of difficulty for students were identified, and better performance was observed in the propaedeutic course, where students obtained a general average of 22.8 on the diagnostic exam and a general average of 76.11 on the final exam

Analysis of the Results in Academic Performance in the Subject of Differential Calculus, After the Impact of the Covid-19 Health Emergency, in New Students in the ITSLP, Year 2022

Para la materia de Cálculo Diferencial del Tecnológico Nacional de México/Instituto Tecnológico de San Luis Potosí (TecNM/ITSLP), el objetivo de estudio, fue analizar el impacto de la emergencia sanitaria por COVID-19, en el rendimiento académico de estudiantes de nuevo ingreso en el año 2022 del ITSLP, contrastando la calificación obtenida en plataforma (tareas y pre examen) con la calificación obtenida en el examen presencial escrito. El análisis de los resultados muestran que los estudiantes de nuevo ingreso (que cursaron la materia de Cálculo diferencial, después de haber transcurrido la totalidad de su educación media superior en línea, derivado del impacto que ocasionó el COVID-19) según las ponderaciones para acreditar el curso: tareas 40 %, pre examen 10 % y examen 50 %, observando cómo caso de estudio dos unidades de la materia de mayor interés, la primera unidad (primera evaluación en la cual se revisan los números reales) y la cuarta unidad (donde se revisa lo más importante de la materia, derivadas), eligiendo dos carreras diferentes de Ingeniería ofrecidas en la Institución, las cuales fueron: Ingeniería en Gestión Empresarial (IGE), e Ingeniería en Sistemas Computacionales (ISC). Los resultados obtenidos permiten concluir que, para ambas carreras, para la unidad 1, un mejor aprovechamiento en tarea y pre examen realizados en plataforma Moodle, que el realizado en el examen, para la unidad 4, los 3 rubros (pre examen, tareas y examen) fueron en línea, donde el rubro mejor aprovechado fue el pre examen, por otro lado, el examen y las tareas tuvieron una magnitud similar. For the Differential Calculus subject of the Tecnologico Nacional de México/Instituto Tecnologico de San Luis Potosí (TecNM/ITSLP), the objective of the study, was to analyze the impact of the health emergency due to COVID-19, in the academic performance of new students in the year 2022 of the ITSLP, contrasting the grade obtained on the platform (homework and pre-exam) with the grade obtained in the written in-person exam. The analysis of the results shows that new students (who took the Differential Calculus subject, after having completed their entire upper secondary education online, derived from the impact caused by COVID-19) according to the weights for accredit the course: homework 40%, pre-exam 10% and exam 50%, observing as a case study two units of greatest interest, the first unit (first evaluation in which real numbers are reviewed) and the fourth unit (where the reviews the most important of the subject, derivatives), choosing two different Engineering careers, offered at the Institution, which were Business Management Engineering (BME), and Computer Systems Engineering (CSE). The results obtained allow us to conclude for both Engineering careers, for unit 1, a better use of homework and pre-exam carried out on the Moodle platform, than that carried out in the exam, for unit 4, the 3 items (pre-exam, homework and exam) were online, where the best used item was the pre exam, the exam and the homework were of similar magnitude

Tuning Bolometric Parameters of Sierpinski Fractal Antenna-Coupled Uncracked/Cracked SWCNT Films by Thermoelectric Characterization at UHF Frequencies

In this work, the bolometric parameters of Sierpinski fractal antenna-coupled SWCNT semi-metallic films are obtained by thermoelectric characterization, this in order to find out the performance as bolometer. The method was based on an experimental setup considering a line-of-sight wireless link between two identical planar fractal antennas, infrared thermography, and electrical resistance measurements. The experimental setup considered the antennas resonant frequencies. Both the transmitting and receiving antenna were third-iteration Sierpinski fractal dipoles designed to work at UHF frequencies. Films made either of cracked or uncracked SWCNT films were each separately coupled to the receiving fractal antenna. Measurements showed that the receiving antenna that was impinged with radiation at UHF frequencies coming from the transmitting antenna, experienced as it was expected an induction of electric current, the induced current flowed through the film producing a temperature change, which in turn caused changes in the radiated heat of the film, as well as changes in the electrical resistance known as Temperature Coefficient of Resistance TCR. The maximum value of TCR for uncracked SWCNT films was −3.6%K−1, higher than the one observed for cracked SWCNT films which exhibited a maximum value of −1.46%K−1. Measurements for conversion of incident radiation to electrical signals known as the Voltage Responsivity ℜv, exhibited values of 9.4 mV/W and 1.4 mV/W for uncracked SWCNT films and cracked SWCNT films, respectively

Tuning Bolometric Parameters of Sierpinski Fractal Antenna-Coupled Uncracked/Cracked SWCNT Films by Thermoelectric Characterization at UHF Frequencies

In this work, the bolometric parameters of Sierpinski fractal antenna-coupled SWCNT semi-metallic films are obtained by thermoelectric characterization, this in order to find out the performance as bolometer. The method was based on an experimental setup considering a line-of-sight wireless link between two identical planar fractal antennas, infrared thermography, and electrical resistance measurements. The experimental setup considered the antennas resonant frequencies. Both the transmitting and receiving antenna were third-iteration Sierpinski fractal dipoles designed to work at UHF frequencies. Films made either of cracked or uncracked SWCNT films were each separately coupled to the receiving fractal antenna. Measurements showed that the receiving antenna that was impinged with radiation at UHF frequencies coming from the transmitting antenna, experienced as it was expected an induction of electric current, the induced current flowed through the film producing a temperature change, which in turn caused changes in the radiated heat of the film, as well as changes in the electrical resistance known as Temperature Coefficient of Resistance TCR. The maximum value of TCR for uncracked SWCNT films was −3.6%K−1, higher than the one observed for cracked SWCNT films which exhibited a maximum value of −1.46%K−1. Measurements for conversion of incident radiation to electrical signals known as the Voltage Responsivity ℜv, exhibited values of 9.4 mV/W and 1.4 mV/W for uncracked SWCNT films and cracked SWCNT films, respectively

Bolometric Properties of Semiconducting and Metallic Single-Walled Carbon Nanotube Composite Films

Single-walled carbon nanotubes (SWNTs) have shown interesting bolometric properties, making them good candidates for the detection of infrared and terahertz radiation. However, little has been reported on the bolometric characteristics of SWNT as a function of their chirality or the possible influence of composite morphology on these properties. The separation of SWNTs based on chirality allows for almost purely semiconductive or metallic SWNTs to be studied. The current study focuses on the bolometric performance of self-assembled composite films of SWNTs. The dependence of these properties on the chirality of the SWNTs was evaluated. To this end, metallic, semiconducting, and a 1:1 mixture of metallic and semiconductive were studied. Also, a theoretical model based on the Wiedemann–Franz law is used to explain the resistance of the SWNT composite films as a function of temperature. Results show that the composite morphology has a significant impact on bolometer performance, with cracked composite films containing highly aligned SWNT arrays suspended over a silicon substrate showing superior responsivity values due to higher thermal isolation. Uncracked composite films showed superior thermal coefficient of resistance values (α = −6.5%/K), however, the responsivity was lower due to lower thermal isolation