Optimización de materia prima en la industria de capacitores

This research aims to analyze the feasibility of replacing the raw material by another one with lower cost, while maintaining the quality of the capacitor. Horacek (et al., 2016) mention "that tantalum capacitor technology has many characteristics such as: low and stable equivalent series resistance, high capacitance retention, a low failure rate, resistance to the environment (humidity, temperature) and low cost". To test these indicators, a two-sample hypothesis test was performed to verify the quality of the product. It was concluded that the raw material was acceptable, meeting the capacitance, resistance, current leakage and dissipation factor 4 indicators improving the quality of the previous product.Esta investigación tiene como objetivo analizar la factibilidad de reemplazar la materia prima por otra con menor costo, manteniendo la calidad del capacitor. Horacek (et al., 2016) mencionan “que la tecnología de capacitores de tantalio tiene muchas características tales como: bajo y estable resistencia en serie equivalente, alta retención de capacitancia, una baja tasa de fallas, resistencia al ambiente (humedad, temperatura) y bajo costo”. Para probar estos indicadores se realizó una prueba de hipótesis de dos muestras para verificar la calidad del producto. Se llegó a la conclusión de que la materia prima era aceptable, cumpliendo con la capacitancia, resistencia, fuga de corriente y factor de disipación 4 indicadores mejorando la calidad del producto anterior

Perceived Diet Quality, Eating Behaviour, and Lifestyle Changes in a Mexican Population with Internet Access during Confinement for the COVID-19 Pandemic: ESCAN-COVID19Mx Survey

Perceived changes in diet quality, emotional eating, physical activity, and lifestyle were evaluated in a group of Mexican adults before and during COVID-19 confinement. In this study, 8289 adults answered an online questionnaire between April and May 2020. Data about sociodemographic characteristics, self-reported weight and height, diet quality, emotional eating, physical activity, and lifestyle changes were collected. Before and after confinement, differences by sociodemographic characteristics were assessed with Wilcoxon, Anova, and linear regression analyses. Most participants were women (80%) between 18 and 38 years old (70%), with a low degree of marginalisation (82.8%) and a high educational level (84.2%); 53.1% had a normal weight and 31.4% were overweight. Half (46.8%) of the participants perceived a change in the quality of their diet. The Diet Quality Index (DQI) was higher during confinement (it improved by 3 points) in all groups, regardless of education level, marginalisation level, or place of residence (p 0.001). Lifestyle changes were present among some of the participants, 6.1% stopped smoking, 12.1% stopped consuming alcohol, 53.3% sleep later, 9% became more sedentary, and increased their screen (43%) as well as sitting and lying down time (81.6%). Mexicans with Internet access staying at home during COVID-19 confinement perceived positive changes in the quality of their diet, smoking, and alcohol consumption, but negative changes in the level of physical activity and sleep quality. These results emphasise the relevance of encouraging healthy lifestyle behaviours during and after times of crisis to prevent the risk of complications due to infectious and chronic diseases

Las mypes de latinoamérica ante la pandemia de covid: resultados de investigación en las micro y pequeñas empresas latinoamericanas

Las pequeñas y medianas empresas (pymes) representan un alto porcentaje del total de empresas en los principales países de América Latina, como bien señala la Organización para la Cooperación y el Desarrollo Económicos (OCDE, 2019) "la gran mayoría (99.5%) de las empresas de la región son pymes... son importantes generadores de empleo a nivel regional (60% del empleo productivo formal)", esto como resultado de un estudio realizado en siete economías latinas: México, Colombia, Perú y Ecuador; dichos datos resaltan la importancia de estas entidades en la economía de la región, sin embargo, no todo es ventajoso para pymes (2020) enumera ocho rubros que exponen grandes desventajas