ABSTRACT Due to the importance of grain production, and the need to work the soil under limited moisture, the aim of this study was to develop computer software to predict the tractive capacity of wheeled tractors for two types of tyre, the effect of different inflation pressures and levels of soil moisture. A mathematical model was developed to predict the tractive capacity of a 4 x 2 AFT tractor. Software was developed and tested by comparing the computational data with those from tests of a working tractor in the field. The parameters under evaluation were drawbar force and front and rear drive wheel slip. At both moisture levels, the bias tyres had the lowest front to rear slip ratio at the lower pressure; the ratios were similar when equipped with radial tyres. The bias tyres show maximum force at a slip ratio of 1.09 at the higher pressure and 1.03 at the lower, while for the radial tyres the ratio was 1.05 at the higher pressure and 1.07 at the lower. Software was developed to process data from the model, with the results used for estimating the tractive force of the tractor. The tractive force was overestimated by the model, which needs further adjustment for direct application in the field. production tyre field 109 1 09 1.0 103 03 105 05 107 07 10 0 1.

Resumo O acúmulo de produtos finais de glicação avançada (AGEs, do inglês advanced glycation end-products) provoca comprometimento morfofuncional dos rins. Os níveis de AGEs podem ser estimados de forma não invasiva por autofluorescência da pele (sAF). Exploramos se a sAF elevada prediz desfechos renais em indivíduos com diabetes tipo 2 (DT2). O estudo foi realizado como uma análise predefinida do Estudo Brasileiro sobre Diabetes, uma coorte prospectiva de centro único de adultos com DT2. Foram considerados os dados de 155 indivíduos acompanhados por até 1.716 dias. A incidência de eventos renais adversos maiores (MAKE, por sua sigla em inglês) foi de 9,6%. Indivíduos com sAF acima da mediana apresentaram maior incidência de MAKEs (4,6% vs. 21%; p = 0,002), com HR de 3,39 [IC 95%: 1,06–10,85; p = 0,040] após ajuste por idade e sexo. A alteração média da TFGe ajustada foi de 1,08 unidades (EP: 1,15; IC95%: –1,20, 3,37) no grupo de baixa sAF e de –5,19 unidades [EP: 1,93; IC95%: –9,10, –1,29] no grupo de elevada sAF (diferença entre sujeitos: F: 5,62; p = 0,019). O grupo sAF elevada apresentou maior prevalência de declínio rápido em comparação ao grupo sAF baixa (36,7% vs. 15,8%; p = 0,028). Em conclusão, a sAF elevada foi relacionada ao aumento da incidência de MAKEs e ao declínio mais rápido da TFGe entre indivíduos com DT2. Tal fato deve ser considerado pelos profissionais de saúde ao identificar indivíduos mais propensos a complicações renais relacionadas ao diabetes. AGEs, (AGEs endproducts end products end-products rins sAF. . (sAF) DT2 DT (DT2) Diabetes 15 1716 1 716 1.71 dias MAKE, MAKE (MAKE 96 9 6 9,6% 4,6% 46 4 (4,6 vs 21% 21 0,002, 0002 0,002 , 0 002 0,002) 339 3 39 3,3 IC 95% 95 1,06–10,85 1061085 06 10 85 0,040 0040 040 sexo 108 08 1,0 EP (EP 1,15 115 IC95% IC95 120 20 –1,20 3,37 337 37 519 5 19 –5,1 [EP 1,93 193 93 910 –9,10 –1,29 129 29 diferença sujeitos F 5,62 562 62 0,019. 0019 0,019 019 0,019) 36,7% 367 36 7 (36,7 15,8% 158 8 0,028. 0028 0,028 028 0,028) conclusão (sAF (DT2 171 71 1.7 9,6 4,6 (4, 000 0,00 00 33 3, 1,06–10,8 106108 0,04 004 04 1, 1,1 11 IC9 12 –1,2 51 –5, 1,9 91 –9,1 5,6 56 001 0,01 01 36,7 (36, 15,8 0,02 02 (DT 17 1. 9, 4, (4 0,0 1,06–10, 10610 –1, –5 –9, 5, 36, (36 15, ( 0, 1,06–10 1061 –1 – –9 (3 1,06–1 106 1,06– 1,06

Abstract The accumulation of advanced glycation end-products (AGEs) elicits morphofunctional kidney impairment. AGEs levels can be noninvasively estimated by skin autofluorescence (SAF). We explored whether high SAF predicts kidney outcomes in type 2 diabetes (T2D) individuals. The study was conducted as a predefined analysis of the Brazilian Diabetes Study, a prospective single-center cohort of T2D adults. Data from 155 individuals followed for up to 1716 days were considered. The incidence of major adverse kidney events (MAKE) was 9.6%. Individuals with above-median SAF had a higher incidence of MAKEs (4.6% vs. 21%; p = 0.002), with an HR of 3.39 [95% CI: 1.06–10.85; p = 0.040] after adjustment by age and gender. The mean adjusted eGFR change was 1.08 units (SE: 1.15; 95%CI: –1.20, 3.37) in the low SAF and –5.19 units [SE: 1.93; 95%CI: –9.10, –1.29] in the high SAF groups (between-subject difference: F: 5.62, p = 0.019). The high-SAF group had a greater prevalence of rapid decliners than the low-SAF group (36.7% vs. 15.8%; p = 0.028). In conclusion, high SAF was related to increased incidence of MAKEs and faster decline in eGFR among T2D subjects. This should be considered by healthcare providers when identifying individuals more prone to diabetes-related kidney complications. endproducts end products (AGEs impairment SAF. . (SAF) TD T D (T2D Study singlecenter single center adults 15 171 MAKE (MAKE 96 9 6 9.6% abovemedian above median 4.6% 46 4 (4.6 vs 21% 21 0.002, 0002 0.002 , 0 002 0.002) 339 3 39 3.3 95% 95 [95 CI 1.06–10.85 1061085 1 06 10 85 0.040 0040 040 gender 108 08 1.0 SE (SE 1.15 115 95%CI 95CI 120 20 –1.20 3.37 337 37 519 5 19 –5.1 [SE 1.93 193 93 910 –9.10 –1.29 129 29 betweensubject between subject difference F 562 62 5.62 0.019. 0019 0.019 019 0.019) highSAF lowSAF 36.7% 367 36 7 (36.7 15.8% 158 8 0.028. 0028 0.028 028 0.028) conclusion subjects diabetesrelated complications (SAF 17 9.6 4.6 (4. 000 0.00 00 33 3. [9 1.06–10.8 106108 0.04 004 04 1. 1.1 11 12 –1.2 51 –5. 1.9 91 –9.1 56 5.6 001 0.01 01 36.7 (36. 15.8 0.02 02 9. 4. (4 0.0 [ 1.06–10. 10610 –1. –5 –9. 5. 36. (36 15. ( 0. 1.06–10 1061 –1 – –9 (3 1.06–1 106 1.06– 1.06

Abstract: The purpose of this article is to achieve optimal coordination for timed overcurrent relays modeled in a test system. The traditional adjustment that is usually used in the field is taken as the base criterion to determine the improvements achieved with the implemented optimization methods. Optimal parameters are determined for two timed overcurrent relays modeled on the IEEE 13-node test system using PowerFactory software. The optimization algorithms are coded in Python. PowerFactory links with Python to generate interoperability between the algorithm and the electrical system. Satisfactory results are achieved from the COA and GSA algorithms with a reduction of more than 50% in relay operating times.

Resumen: El objeto de este artículo es conseguir la coordinación óptima para los relés de sobrecorriente temporizados, modelados en un sistema de prueba. El ajuste tradicional que se emplea usualmente en el campo se toma como criterio base para determinar las mejoras conseguidas con los métodos de optimización implementados. Se determinan parámetros óptimos para dos relés de sobrecorriente temporizados modelados en el sistema de prueba de 13 nodos de la IEEE mediante el software PowerFactory. Los algoritmos de optimización son codificados en Python. Gracias a la interfaz que presenta PowerFactoy con Python, cada algoritmo se ejecuta dentro del sistema eléctrico. Se consiguen resultados satisfactorios de los algoritmos COA y GSA con una reducción de más del 50 % en los tiempos de operación de los relés.

Summary: A methodology is proposed for the interpretation of gas emissions that come from the soil based on the integration of the primary actors in the production systems and members of the ecosystems. The methodology presents data in units that are easy to understand by people outside the study of gas emissions in different ecosystems and production systems, and optimizes the calculation of small and medium scale predictions through estimation with a high degree of ratio and mathematical adjustment. From the use of the ideal gas equation, it was possible to develop the methodology to obtain a conversion factor taking into account variables such as the pressure and temperature of the site where the gas quantification experiment is being carried out. With the aforementioned, it is easier to obtain the constant of the molar volume of the container used and data transformation to ensure compliance with basic statistical parameters such as normality, variance similar to zero, and confidence intervals with less deviation. The present methodological development represents a tool for the generation of data at the laboratory and plot level with mathematical support that facilitates the execution of mathematical models in comparison with other methodologies.

Resumen: Se propone una metodología para la interpretación de las emisiones de gases que proceden del suelo a partir de la integración de los actores primarios en los sistemas de producción e integrantes de los ecosistemas. La metodología presenta datos en unidades de fácil comprensión por personas ajenas al estudio de emisiones de gases en los distintos ecosistemas y sistemas de producción, optimiza el cálculo de predicciones a pequeña y mediana escala mediante la estimación con alto grado de razón y ajuste matemático. A partir del empleo de la ecuación general de los gases ideales se pudo desarrollar la metodología para obtener un factor de conversión teniendo en cuenta variables como la presión y temperatura del sitio donde se esté ejecutando el experimento de cuantificación de gases, con lo anterior se facilita la obtención de la constante del volumen molar propio del contenedor utilizado y la transformación de datos para garantizar el cumplimiento de parámetros estadísticos básicos como normalidad, varianza similar a cero e intervalos de confianza con menor desviación. El presente desarrollo metodológico representa una herramienta para la generación de datos a nivel de laboratorio y parcelario con soporte matemático que facilita la ejecución de modelos matemáticos en comparación con otras metodologías.

Resumen: Los antitrombóticos son fármacos que se utilizan para prevenir la formación de coágulos sanguíneos, también conocidos como trombos. Estos coágulos pueden causar graves problemas de salud, como infartos o enfermedades cerebrovasculares. En este artículo se analizan diferentes tipos de antitrombóticos, como los antiplaquetarios y los anticoagulantes, y se discuten sus mecanismos de acción. Además, se examinan los beneficios y los riesgos asociados con el uso de antitrombóticos. Por un lado, estos fármacos pueden reducir el riesgo de eventos trombóticos, lo que puede ser especialmente beneficioso en pacientes con condiciones de alto riesgo, como aquellos que han sufrido un infarto o que tienen fibrilación auricular. Por otro lado, también se discuten los posibles efectos secundarios de los antitrombóticos, como el aumento del riesgo de sangrado. Además, se proporcionan pautas para su uso seguro en diferentes escenarios clínicos. Finalmente, se abordan las estrategias de monitoreo y ajuste de la dosis de estos medicamentos para garantizar su eficacia y seguridad en los pacientes.

Abstract: Antithrombotics are drugs used to prevent the formation of blood clots, also known as thrombi. These clots can cause serious health problems, such as heart attacks or strokes. Different types of antithrombotics, such as antiplatelets and anticoagulants, are analyzed and their mechanisms of action are discussed. Additionally, the benefits and risks associated with the use of antithrombotics are examined. On the one hand, these drugs can reduce the risk of thrombotic events, which may be especially beneficial in patients with high-risk conditions, such as those who have suffered a heart attack or who have atrial fibrillation. On the other hand, the possible side effects of antithrombotics, such as the increased risk of bleeding, are also discussed and guidelines for their safe use in different clinical scenarios are provided. Additionally, monitoring and dose adjustment strategies for these medications are addressed to ensure their effectiveness and safety in patients.

Resumen Introducción. Las medidas de adaptación al cambio climático requieren de la toma de decisiones informadas. Sin embargo, la agricultura de pequeña escala muestra bajas tasas de adopción de tecnologías por su costo y falta de conectividad. Objetivo. Evaluar tres prototipos de dispositivos para agricultura de pequeña escala y de bajo costo para medir humedad de suelo en diferentes texturas, así como determinar las respectivas ecuaciones de calibración y los efectos de conductividad eléctrica y temperatura en la medida de humedad. Materiales y métodos. Se evaluaron tres prototipos de dispositivos de medición y registro de humedad de suelo, en suelos con diferencial en contenido de arcilla/arena y conductividad eléctrica en parcelas productivas de la Universidad Zamorano, en Honduras; y Finca demostrativa en Popayán, Colombia, durante el primer trimestre del 2022. Se tomaron como referencia sensores comerciales para la comparación del desempeño de los prototipos, mediante análisis de regresión de las lecturas por hora de los sensores durante 90 días. Se recolectaron las variables de conductividad eléctrica (dS/m) y temperatura para determinar la influencia en la precisión de la lectura de humedad. Resultados. Los dispositivos de medición y registro de humedad presentaron un mejor desempeño en suelos con menor contenido de arena. La medición de los dispositivos sobrestimó entre 0,19 y 0,52 puntos porcentuales la lectura de humedad por cada grado adicional de temperatura del suelo, y que por cada dS/m adicional de conductividad eléctrica la lectura se debe ajustar entre 8 y 55 puntos porcentuales. Conclusiones. El prototipo A fue el dispositivo más exacto, mientras que el prototipo B fue el más preciso, con respecto a los sensores comerciales. Los dispositivos de humedad presentaron un mejor desempeño en suelos con menor contenido de arena. Los tres modelos evaluados obtuvieron el mejor desempeño en suelo franco con contenido medio de arcilla.

Abstract Introduction. Climate change adaptation measures require informed decision-making. However, small-scale agriculture shows low rates of technology adoption due to cost and lack of connectivity. Objective. To evaluate three low-cost prototypes of small-scale agriculture devices for soil moisture measurement in different soil textures, as well as to determine the respective calibration equations, and the effects of electrical conductivity and temperature on moisture measurement. Materials and methods. Three measurement and recording prototypes for soil moisture were evaluated in soils with variations in clay/sand content and electrical conductivity in productive plots at Zamorano University in Honduras and a demonstration farm in Popayán, Colombia during the first quarter of 2022. Commercial sensors were used as a reference to compare the performance of the prototypes through regression analysis of hourly sensor readings over 90 days. Electrical conductivity (dS/m) and temperature variables were collected to determine their influence on moisture reading accuracy. Results. The soil moisture measurement devices showed better performance in soils with lower sand content. The measurement from the devices overestimated moisture readings by 0.19 to 0.52 percentage points for each additional degree of soil temperature. Additionally, for each additional dS/m of electrical conductivity, the reading needed adjustment by 8 to 55 percentage points. Conclusions. Prototype A was the most accurate device, while prototype B was the most precise compared to commercial sensors. Soil moisture devices performed best in soils with lower sand content. The three models evaluated performed best in loam soil with a medium clay content.

Objetivo: comparar el número de citologías oncóticas planificadas y las realizadas en la ciudad de Río de Janeiro entre los años 2013 y 2022 . Métodos: utilizando la población femenina de Río de Janeiro, se estimó cuántas pruebas se deberían realizar si se recomienda el tamizaje. realizado por el Ministerio de Salud se realizó de manera ideal y luego se comparó con la cantidad de pruebas disponibles en la base de datos pública. Resultados: En este periodo se realizaron 1.364.325 frente a una estimación de 7.886.720. Después del ajuste por el uso de asistencia sanitaria complementaria, la pandemia y los exámenes fuera de la edad recomendada, se observó el 36% del ideal. Conclusión: la cantidad realizada está muy por debajo de lo ideal, incluso después de ajustes, lo que aumenta los costos para el servicio público de salud, haciendo necesarias nuevas políticas públicas para mejorar el seguimiento.

Objetivo: comparar a quantidade de colpocitologias oncóticas ideias e a realmente realizadas no município do Rio de Janeiro entre os anos de 2013 e 2022. Métodos: através da população feminina do Rio de Janeiro, foi feita estimativa de quantos exames deveriam ser realizados caso o rastreio preconizado pelo Ministério da Saúde fosse feito de forma ideal e posteriormente foi comparado com a quantidade de exames disponíveis na base de dados pública. Resultados: foram realizados 1.364.325 nesse período comparado a 7.886.720 estimados. Após ajuste pelo uso de saúde suplementar, pandemia e exames fora da idade recomendada, observou-se 36% do ideal. Conclusão: a quantidade realizada está muito abaixo da ideal, mesmo após os ajustes, o que aumenta custos para o serviço de saúde pública, sendo necessárias novas políticas públicas para melhorar o rastreamento.

Objective: to compare the number of planned oncotic smear tests and those actually performed in the city of Rio de Janeiro between the years 2013 and 2022 . Methods: using the female population of Rio de Janeiro, an estimate was made of how many tests should be carried out if screening recommended by the Ministry of Health was done in an ideal way and was subsequently compared with the number of tests available in the public database. Results: 1,364,325 were carried out in this period compared to an estimated 7,886,720. After adjustment for the use of supplementary healthcare, the pandemic and exams outside the recommended age, 36% of the ideal was observed. Conclusion: the quantity carried out is far below ideal, even after adjustments, which increases costs for the public health service, making new public policies necessary to improve tracking.

Abstract: Environmental pollution from transportation has been a fundamental challenge for humanity throughout history, with conventional fuels contributing significantly to environmental degradation. This project seeks to suppress pollution and reduce noise generated by motorcycle taxis, whether for personal and/or private use. The main objective of the research work was to implement an electrolyzer in the combustion system of a motorcycle taxi to suppress environmental pollution and reduce noise. Methods included vehicle preparation, electrolyzer installation, battery adjustment, hydrogen generation, emissions measurement, safety, and data collection. As a result, the electrolyzer was implemented in the single-cylinder motorcycle taxi; The noise limit allowed at work in Peru is 85 dB, which is equivalent to 100 % noise at most; When using gasoline, a value of 76.4 dB was obtained, equivalent to 89.88 % noise, and when using hydrogen, a value of 71.7 dB was obtained, equivalent to 84.35 % noise, therefore, the total noise reduction was 4.70 dB (5.53 %) than established. The discussion highlighted that hydrogen is a clean fuel, with zero emissions and only emitting water vapor instead of polluting gases (5). The conclusion highlights the critical importance of the research, supported by the total reduction of 5.53 % of noise with this new technology and in turn external sources support that using hydrogen produced a smoother and quieter combustion; Regarding the useful life of the engine, due to the cleaner and more efficient combustion, the accumulation of waste was reduced, which benefits reducing the wear of internal components and the need for costly maintenance.

Resumen: La contaminación ambiental derivada del transporte ha sido un desafío fundamental para la humanidad a lo largo de la historia, con los combustibles convencionales contribuyendo significativamente a la degradación ambiental. Este proyecto busca suprimir la contaminación y reducir el ruido generada por mototaxis, ya sean de uso personal y/o privado. El trabajo de investigación tuvo como objetivo principal implementar un electrolizador en el sistema de combustión de un mototaxi para suprimir la contaminación ambiental y reducir el ruido. Los métodos incluyeron la preparación del vehículo, instalación del electrolizador, ajuste de la batería, generación de hidrógeno, medición de emisiones, seguridad y recolección de datos. Como resultado, se logró implementar el electrolizador en el mototaxi monocilíndrico; el límite de ruido permitido en el trabajo en el Perú es de 85 dB, que equivalen el 100 % de ruido como máximo; al utilizar gasolina se obtuvo un valor de 76.4 dB equivalentes a 89.88 % de ruido y al usar hidrógeno se obtuvo un valor de 71.7 dB siendo el 84.35 % de ruido, por lo tanto, la reducción total de ruido fue de 4.70 dB (5.53%) de lo establecido. La discusión destacó que el hidrógeno es un combustible limpio, con nulas emisiones y solo emitiendo vapor de agua en vez de gases contaminantes (5). La conclusión subraya la importancia crítica de la investigación, respaldada por la reducción total del 5.53 % de ruido con esta nueva tecnología y a su vez fuentes externas apoyan, que el utilizar hidrógeno produjo una combustión más suave y silenciosa. En cuanto a la vida útil del motor, la combustión más limpia y eficiente reduce la acumulación de residuos, lo que disminuye el desgaste de los componentes internos y la necesidad de mantenimientos costosos.

BACKGROUND: Limited research exists on medical students' coping and adjustment skills, especially in the South African context. Stakeholders planning medical curricula need to be aware of emotional and communication skills that allow students to cope and adjust to stress associated with transitioning to medical studies OBJECTIVE: To design a support framework to facilitate first-year undergraduate medical students' social learning and integration skills METHODS: This descriptive qualitative case study used multiple data collection methods, nominal group meetings and Delphi questionnaires to explore and understand undergraduate medical students' challenges with social learning and integration factors. These insights were then used to develop the support framework RESULTS: The support framework articulates levels of engagement and actions required to address social learning and integrated factors, namely under-preparedness, peer support, confidence, self-management, alienation and academic advice CONCLUSION: Implementing the proposed support framework on social learning and integration could facilitate the successful transition of first-year undergraduate medical students from high school to university. This framework aids students in dealing with social learning and integrated factors, such as under-preparedness, peer support, confidence, self-management and alienation as well as academic advice using contextualised and appropriate skills and tools

RESUMEN En el contexto de los estudios observacionales, la definición de la fuerza de asociación entre una variable exposición y un resultado, evento o punto final, puede verse alterada por la desigual distribución de covariables entre aquellos que presentan o no la exposición citada. Revisaremos en este escrito diferentes aproximaciones estadísticas al problema en cuestión, desde el análisis multivariado hasta el ajuste que toma en cuenta la inversa de la probabilidad ponderada de tratamiento, y las aplicaremos a ejemplos extraídos de la literatura.

ABSTRACT In the context of observational studies, the definition of the strength of the association between an exposure variable and an outcome variable, event or endpoint, may be affected by the unequal distribution of covariates among those with and without the specified exposure. In this paper we will review different statistical approaches to the subject matter, from multivariate analysis to adjustment which considers the inverse probability of treatment weighting, and we will apply them to examples taken from the medical literature.

ABSTRACT Purpose We assessed the prognostic impact of the 2012 Briganti nomogram on prostate cancer (PCa) progression in intermediate-risk (IR) patients presenting with PSA <10ng/mL, ISUP grade group 3, and clinical stage up to cT2b treated with robot assisted radical prostatectomy eventually associated with extended pelvic lymph node dissection. Materials and Methods From January 2013 to December 2021, data of surgically treated IR PCa patients were retrospectively evaluated. Only patients presenting with the above-mentioned features were considered. The 2012 Briganti nomogram was assessed either as a continuous and a categorical variable (up to the median, which was detected as 6%, vs. above the median). The association with PCa progression, defined as biochemical recurrence, and/or metastatic progression, was evaluated by Cox proportional hazard regression models. Results Overall, 147 patients were included. Compared to subjects with a nomogram score up to 6%, those presenting with a score above 6% were more likely to be younger, had larger/palpable tumors, presented with higher PSA, underwent tumor upgrading, harbored non-organ confined disease, and had positive surgical margins at final pathology. PCa progression, which occurred in 32 (21.7%) cases, was independently predicted by the 2012 Briganti nomogram both considered as a continuous (Hazard Ratio [HR]:1.04, 95% Confidence Interval [CI]:1.01-1.08;p=0.021), and a categorical variable (HR:2.32; 95%CI:1.11-4.87;p=0.026), even after adjustment for tumor upgrading. Conclusions In IR PCa patients with PSA <10ng/mL, ISUP grade group 3, and clinical stage up to cT2b, the 2012 Briganti nomogram independently predicts PCa progression. In this challenging subset of patients, this tool can identify prognostic subgroups, independently by upgrading issues. 201 (PCa intermediaterisk intermediate risk (IR 10ngmL ngmL 10ng mL ng <10ng/mL 3 cTb cT b dissection 2021 abovementioned mentioned median 6 vs median. . median) recurrence andor or models Overall 14 included younger largerpalpable larger palpable tumors nonorgan non organ disease pathology 21.7% 217 21 7 (21.7% cases Hazard HR1.04, HR104 HR 1.04, 1 04 [HR]:1.04 95 CI1.011.08p=0.021, CI101108p0021 CIp CI 1.01 1.08 p=0.021 , 01 08 p 0 021 [CI]:1.01-1.08;p=0.021) HR2.32 HR232 2.32 2 (HR:2.32 95%CI1.114.87p=0.026, 95CI111487p0026 95%CI 1.11 4.87 p=0.026 11 4 87 026 95%CI:1.11-4.87;p=0.026) subgroups issues 20 202 21.7 (21.7 HR1 HR1.04 HR10 104 1.04 [HR]:1.0 9 CI1 011 08p CI1.011.08p=0.021 CI101108p002 101 1.0 108 p0021 p=0.02 02 [CI]:1.01-1.08;p=0.021 HR2 HR2.3 HR23 232 2.3 (HR:2.3 114 87p 95%CI1.114.87p=0.026 95CI111487p002 95CI 111 1.1 487 4.8 p0026 8 95%CI:1.11-4.87;p=0.026 21. (21. HR1.0 10 [HR]:1. CI1.011.08p=0.02 CI101108p00 1. p002 p=0.0 [CI]:1.01-1.08;p=0.02 HR2. 23 2. (HR:2. 95%CI1.114.87p=0.02 95CI111487p00 48 4. 95%CI:1.11-4.87;p=0.02 (21 HR1. [HR]:1 CI1.011.08p=0.0 CI101108p0 p00 p=0. [CI]:1.01-1.08;p=0.0 (HR:2 95%CI1.114.87p=0.0 95CI111487p0 95%CI:1.11-4.87;p=0.0 (2 [HR]: CI1.011.08p=0. CI101108p p0 p=0 [CI]:1.01-1.08;p=0. (HR: 95%CI1.114.87p=0. 95CI111487p 95%CI:1.11-4.87;p=0. ( [HR] CI1.011.08p=0 p= [CI]:1.01-1.08;p=0 (HR 95%CI1.114.87p=0 95%CI:1.11-4.87;p=0 [HR CI1.011.08p= [CI]:1.01-1.08;p= 95%CI1.114.87p= 95%CI:1.11-4.87;p= CI1.011.08p [CI]:1.01-1.08;p 95%CI1.114.87p 95%CI:1.11-4.87;p

Abstract Background Heart rate (HR) has shown prognostic value in patients with heart failure with reduced ejection fraction (HFrEF) and sinus rhythm. However, the method of measurement is debated in the literature. Objectives To compare HR on Holter with 3 resting electrocardiograms (ECG1, ECG2, and ECG3) in patients with HFrEF and sinus rhythm. Methods This was a cross-sectional study with 135 patients with heart failure with ejection fraction ≤ 40% and sinus rhythm. HR was assessed by ECG and Holter. Analyses included intraclass correlation coefficient (ICC), robust regression, root mean squared error, Bland-Altman, and area under the receiver operating characteristic (ROC) curve. A significance level of 0.05 and Bonferroni-Holm adjustment were adopted to minimize type I errors. Results The median [interquartile range] age and ejection fraction were 65 years [16] and 30% [11], respectively. The ICC of the 3 ECGs was 0.922 (95% confidence interval: 0.892; 0.942). The robust regression coefficients for ECG1 and ECG3 were 0.20 (95% confidence interval: 0.12; 0.29) and 0.21 (95% confidence interval: 0.06; 0.36). The robust R2 was 0.711 (95% confidence interval: 0.628; 0.76). In the Bland-Altman agreement analysis, the limits of agreement were −17.0 (95% confidence interval: −19.0; −15.0) and 32.0 (95% confidence interval: 30.0; 34.0). The area under the ROC curve was 0.896 (95% confidence interval: 0.865; 0.923). Conclusion The HR on ECG showed high agreement with the HR on Holter, validating its clinical use in patients with HFrEF and sinus rhythm. However, agreement was suboptimal in one third of patients with HR below 70 bpm on ECG; thus, 24-hour Holter monitoring should be considered in this context. (HR (HFrEF rhythm However literature ECG1, (ECG1 ECG2 crosssectional cross sectional 13 40 ICC, , (ICC) error BlandAltman, BlandAltman Bland Altman, Altman (ROC 005 0 05 0.0 BonferroniHolm Bonferroni Holm errors interquartile range 6 16 [16 30 11, 11 [11] respectively 0922 922 0.92 95% 95 (95 interval 0.892 0892 892 0.942. 0942 0.942 . 942 0.942) 020 20 0.2 0.12 012 12 0.29 029 29 021 21 0.06 006 06 0.36. 036 0.36 36 0.36) R 0711 711 0.71 0.628 0628 628 0.76. 076 0.76 76 0.76) analysis 170 17 −17. −19.0 190 19 −15.0 150 15 320 32 32. 30.0 300 34.0. 340 34.0 34 34.0) 0896 896 0.89 0.865 0865 865 0.923. 0923 0.923 923 0.923) 7 thus 24hour hour 24 context (ECG 1 4 (ICC 00 0. [1 [11 092 92 0.9 9 (9 089 89 094 0.94 94 02 2 0.1 01 03 0.3 071 71 0.7 0.62 062 62 07 −17 −19. −15. 30. 34. 0.8 0.86 086 86 [ 09 ( 08 8 0.6 −1 −19 −15 −

Resumo Fundamento A frequência cardíaca (FC) na insuficiência cardíaca com fração de ejeção reduzida (ICFEr) e ritmo sinusal apresenta valor prognóstico. Entretanto, o método de mensuração é debatido na literatura. Objetivos Comparar em pacientes com ICFEr e ritmo sinusal a FC no Holter com três eletrocardiogramas de repouso: ECG1, ECG2 e ECG3. Metodologia Estudo transversal com 135 pacientes portadores de insuficiência cardíaca com fração de ejeção ≤ 40% e ritmo sinusal. A FC foi avaliada por ECG e Holter. Análises incluíram o coeficiente de correlação intraclasse (CCI), regressão robusta, raiz do erro quadrático médio, Bland-Altman e a área sobre a curva ROC. Adotou-se nível de significância de 0,05 e o ajuste de Bonferroni-Holm para minimizar erros tipo I. Resultados As medianas [intervalo interquartil] de idade e fração de ejeção foram de 65 anos [16] e 30% [11], respectivamente. O CCI dos 3 ECG foi de 0,922 (intervalo de confiança de 95%: 0,892; 0,942). Os coeficientes de regressão robusta para ECG1 e ECG3 foram 0,20 (intervalo de confiança de 95%: 0,12; 0,29) e 0,21 (intervalo de confiança de 95%: 0,06; 0,36). O R2 robusto foi de 0,711 (intervalo de confiança de 95%: 0,628; 0,76). Na análise de concordância de Bland-Altman, os limites de concordância foram de −17,0 (intervalo de confiança de 95%: −19,0; −15,0) e 32,0 (intervalo de confiança de 95%: 30,0; 34,0). A área sob a curva ROC foi de 0,896 (intervalo de confiança de 95%: 0,865; 0,923). Conclusão A FC do ECG mostrou alta concordância com a FC do Holter, validando seu uso clínico em pacientes com ICFEr e ritmo sinusal. Contudo, a concordância foi subótima em um terço dos pacientes com FC inferior a 70 bpm pelo ECG, devendo ser considerada a realização de Holter neste contexto. (FC (ICFEr prognóstico Entretanto literatura repouso 13 40 CCI, , (CCI) médio BlandAltman Bland Altman Adotouse Adotou se 005 0 05 0,0 BonferroniHolm Bonferroni Holm I intervalo interquartil 6 16 [16 30 11, 11 [11] respectivamente 0922 922 0,92 95% 95 0,892 0892 892 0,942. 0942 0,942 . 942 0,942) 020 20 0,2 0,12 012 12 0,29 029 29 021 21 0,06 006 06 0,36. 036 0,36 36 0,36) R 0711 711 0,71 0,628 0628 628 0,76. 076 0,76 76 0,76) BlandAltman, Altman, 170 17 −17, −19,0 190 19 −15,0 150 15 320 32 32, 30,0 300 34,0. 340 34,0 34 34,0) 0896 896 0,89 0,865 0865 865 0,923. 0923 0,923 923 0,923) Contudo 7 contexto 1 4 (CCI 00 0, [1 [11 092 92 0,9 9 089 89 094 0,94 94 02 2 0,1 01 03 0,3 071 71 0,7 0,62 062 62 07 −17 −19, −15, 30, 34, 0,8 0,86 086 86 [ 09 08 8 0,6 −1 −19 −15 −

Resumo A autoeficácia dos docentes e seu acesso a recursos podem influenciar a transição do ensino presencial para o ensino remoto emergencial. Este estudo objetivou construir e verificar evidências de validade das escalas de Autoeficácia e Acesso a Recursos de Docentes do Ensino Superior que passaram pela transição para aulas remotas. As escalas foram construídas e submetidas à validação semântica e por juízes. A coleta de dados foi realizada a distância com 135 professores. Foram realizadas análises descritivas, exploratórias e confirmatórias. Ambas as escalas apresentaram cargas fatoriais acima de 0,4. A escala de Autoeficácia docente apresentou-se unifatorial com bom índice de consistência interna (α = 0,95) e bons indicadores de ajuste (x 2 : 256,794; df: 131; CMIN/DF: 1,96; GFI: 0,89; RMSR: 0,05; CFI: 0,93; TLI: 0,91; RMSEA: 0,07). A escala de acesso a recursos apresentou-se com dois fatores e obteve bons índices de consistência interna (α entre 0,80 e 0,88) e bons indicadores de ajuste (x 2 : 67,99; df: 31; CMIN/DF: 2,19; GFI: 0,90; RMSR: 0,12; CFI: 0,94; TLI: 0,92; RMSEA: 0,094). Este estudo amplia o conhecimento a respeito da transição do ensino presencial para o ensino remoto, e traz implicações práticas que poderão auxiliar no planejamento e desenvolvimento das ações educacionais.

Abstract Teachers' self-efficacy and access to resources can influence the transition to emergency remote teaching. This study aimed to build and verify validity evidences of the Self-Efficacy and Access to Resources scales of Higher Education Teachers who underwent the transition to remote classes. The scales were constructed and submitted to semantic and expert validation. Data collection was carried out remotely with 135 teachers. Descriptive, exploratory and confirmatory analyzes were carried out. Both scales presented factor loadings above 0.4. The Teacher Self-Efficacy scale was unifactorial with a good internal consistency index (α = 0.95) and good adjustment indicators (x2: 256.794; df: 131; CMIN/DF: 1.96; GFI: 0.89; RMSR: 0.05; CFI: 0.93; TLI: 0.91; RMSEA: 0.07). The access to resources scale had two factors and obtained good internal consistency indexes (α between 0.80 and 0.88) and good adjustment indicators 67.99; df: 31; CMIN/DF: 2.19; GFI: 0.90; RMSR: 0.12; CFI: 0.94; TLI: 0.92; RMSEA: 0.094). This study expands knowledge regarding the transition from face-to-face teaching to remote teaching, and brings practical implications that may help in the planning and development of educational actions.

Resumen La autoeficacia de los docentes y el acceso a los recursos pueden influir en la transición a la enseñanza remota de emergencia. Este estudio tuvo como objetivo construir y verificar evidencias de validez de las escalas de Autoeficacia y Acceso a Recursos de Profesores de Educación Superior que atravesaron la transición a clases remotas. Las escalas fueron sometidas a validación semántica y de expertos. La recolección de datos se realizó de forma remota con 135 docentes. Se realizaron análisis descriptivos, exploratorios y confirmatorios. Ambas escalas presentaron cargas factoriales superiores α 0,4. La escala de Autoeficacia Docente fue unifactorial, con buen índice de consistencia interna (α = 0,95) y buenos indicadores de ajuste (x2: 256,794; gl: 131; CMIN/DF: 1,96; GFI: 0,89; RMSR: 0,05; CFI: 0,93; TLI: 0,91; RMSEA: 0,07). La escala de Acceso a Recursos tuvo dos factores y obtuvo buenos índices de consistencia interna (α entre 0,80 y 0,88) y buenos indicadores de ajuste X 67,99; df: 31; CMIN/DF: 2,19; GFI: 0,90; RMSR: 0,12; CFI: 0,94; TLI: 0,92; RMSEA: 0,094). Este estudio amplía el conocimiento sobre la transición de la enseñanza presencial a la enseñanza remota, y aporta implicaciones que pueden ayudar en la planificación y desarrollo de acciones educativas.

ABSTRACT In this study, the particle sizes distribution model that best characterizes the granulometric composition of saprolite ores fed to the Cuban Caron process was determined. Three samples of soft and hard streamers from the Punta Gorda, Camarioca Este and Yagrumaje Sur deposits were evaluated. The main mineralogical phases of the samples were identified by the X-ray powder diffraction method. The predominance of the mineralogical phases lizardite, clinochlore and chlorite-serpentine was observed in the different samples under study. The determination of the parameters of the granulometric models and the evaluation of the quality of their adjustment with statistical techniques, allowed us to identify that the Swebrec function is the one that best describes the distribution of the experimental particle sizes of the streamer samples, with determination coefficients higher than 0,91 and residual errors lower than 6,9 %.

RESUMEN En este estudio se determinó el modelo de distribución de tamaños de partícula que mejor caracteriza la composición granulométrica de las menas de saprolitas alimentadas al proceso Caron cubano. Se evaluaron tres muestras de serpentinas blandas y duras concernientes a los yacimientos de Punta Gorda, Camarioca Este y Yagrumaje Sur. Las principales fases mineralógicas de las muestras se identificaron por el método de difracción de rayos X en polvo. Se observó el predominio de las fases mineralógicas lizardita, clinocloro y clorita-serpentina en las diferentes muestras bajo estudio. La determinación de los parámetros de los modelos granulométricos y la evaluación de la calidad de su ajuste con técnicas estadísticas, permitió identificar que la función Swebrec es la que mejor describe la distribución de los tamaños de partículas experimentales de las muestras de serpentinas, con coeficientes de determinación superiores a 0,91 y errores residuales inferiores a 6,9 %.

Abstract Due to the arrival of COVID-19 in Mexico, a majority of the population was affected in terms of their labor participation. This article aims to measure the levels of educational mismatch -overeducation and undereducation- in Mexico before and after the closure of activities decreed during the pandemic. The research examines changes in educational adjustment from the first quarter of 2020 to the third quarter of the same year and the first quarter of the following year, and it investigates whether there were modifications in sociodemographic profiles, changes in the conditions of those experiencing educational mismatch, and if these dynamics were a result of the crisis. The analysis uses the National Occupation and Employment Survey and employs multinomial models to assess the probability of being in some form of educational mismatch, with a grouped base for five survey editions to establish changes over time. The results show an increase of approximately 0.5% in overeducation in the total occupied population, considering sociodemographic and labor insertion characteristics. Similarly, there are differences between informal and formal employment in terms of how these changes occur, with the former showing increases first, followed by the latter.

Resumen En México, la llegada de la covid-19 afectó la participación laboral de la mayoría de la población. A propósito de ese fenómeno, con este artículo se busca medir los niveles de desajuste educativo -por sobreducación y subeducación- antes y después del cierre de actividades decretado ante la pandemia. Se revisan los cambios en el ajuste educativo entre el primer trimestre de 2020 y el tercero del mismo año, sumando además el primer trimestre de 2021. La atención se centra en si se modificaron los perfiles sociodemográficos y si esto implicó cambios en las condiciones de los desajustados, o si bien estos fueron producto de la crisis. Para el análisis se utilizan la Encuesta Nacional de Ocupación y Empleo y modelos multinomiales sobre la probabilidad de insertarse en algún tipo de inadecuación educativa con una base agrupada para cinco ediciones de la encuesta a fin de establecer los cambios en el tiempo. Los resultados muestran que se registra un aumento de alrededor de 0,5 % de sobreducación en la población ocupada total, si se consideran las características sociodemográficas y de inserción laboral. Del mismo modo, se reflejan diferencias entre los empleos informales y los formales en términos de cómo ocurren estos cambios, pues los primeros se inician con incrementos, mientras en los segundos esto se da en el mediano plazo.