Desarrollo de una herramienta para la detección de nubes precipitables en imágenes meteorológicas GOES-16 usando técnicas de Machine Learning.

El Machine Learning es un conjunto de técnicas derivadas de la inteligencia artificial, cuyo objetivo es crear algoritmos automatizados a partir de patrones relacionados con un fenómeno. Este trabajo realizó un estudio comparativo de 3 métodos de aprendizaje para desarrollar una herramienta de clasificación de nubes precipitables en Colombia. Entre los métodos seleccionados se implementaron Random Forest, Maquinas de Soporte Vectorial y Redes Neuronales Artificiales. Para este trabajo se contó con datos de precipitación de 52 estaciones meteorológicas del IDEAM e imágenes del satélite GOES - 16 en el mismo intervalo de tiempo, donde se reportaron presencia/ausencia de nubes (precipitables/noprecipitables). Con la información satelital se tomaron 3 patrones de textura (varianza, media y homogeneidad) en 7 de las 16 bandas: azul, rojo, infrarrojo cercano, vapor de agua nivel bajo, medio y alto, e infrarrojo térmico. Se realizo un análisis de sensibilidad de hiper- parámetros con el propósito de seleccionar los mejores clasificadores entre los tres métodos. Los resultados obtenidos con el 40% del conjunto de datos, presentan desempeños de 99.87%, 99.97% y 100% para Random Forest, Maquinas de Soporte Vectorial y Redes Neuronales Artificiales respectivamente. Finalmente, este trabajo presenta una interfaz de usuario, para hacer la selección del clasificador y cargar la imagen multiespectral del GOES -16. La interfaz permite exportar la máscara obtenida para efectos de análisis en formato tif.PregradoINGENIERO(A) TOPOGRAFIC

Representaciones sociales del autoexamen de mama en mujeres adultas de zonas rurales de Risaralda

Esta investigación tiene como objetivo explorar las Representaciones Sociales de un grupo de mujeres de la zona rural de Risaralda, acerca del autoexamen de mama como práctica de autocuidado frente a la detección temprana del cáncer, y entender la dinámica del interaccionismo comunitario en cuanto a los determinantes de las prácticas de esta población. Para el anterior estudio se realizará una investigación de tipo cualitativo exploratorio, durante el segundo semestre de 2019, con mujeres que no han sido diagnosticadas con algún tipo de cáncer

Investigación, ciencia y tecnología. Tomo 1

Esta obra contiene los resultados y memorias de las investigaciones de la Universidad Politécnica Salesiana, correspondientes a los años 2009-2010 en el área de Ciencias Sociales Humanas y de la Tecnología

Revolution: Museo de las estrellas un paseo por la fama : Hollywood

Convocatoria proyectos de innovación de Extremadura 2020/2021Se describe un proyecto llevado a cabo entre 13 centros educativos extremeños que consistió en desarrollar cinco unidades de trabajo gamificadas, cinco historias detectivescas con misterios por resolver, donde se ponían a prueba las habilidades de lógica, la capacidad de observación, de concentración y de atención de los alumnos. Los objetivos principales de la propuesta fueron: promover la puesta en práctica de proyectos intercentros; impulsar pedagogías activas; desarrollar la competencia digital a través del uso de las pedagogías emergentes lo que ha permitido llevar a cabo una enseñanza presencial, híbrida y virtual y atender a la diversidadExtremaduraES

Effects of pre-operative isolation on postoperative pulmonary complications after elective surgery: an international prospective cohort study an international prospective cohort study

We aimed to determine the impact of pre-operative isolation on postoperative pulmonary complications after elective surgery during the global SARS-CoV-2 pandemic. We performed an international prospective cohort study including patients undergoing elective surgery in October 2020. Isolation was defined as the period before surgery during which patients did not leave their house or receive visitors from outside their household. The primary outcome was postoperative pulmonary complications, adjusted in multivariable models for measured confounders. Pre-defined sub-group analyses were performed for the primary outcome. A total of 96,454 patients from 114 countries were included and overall, 26,948 (27.9%) patients isolated before surgery. Postoperative pulmonary complications were recorded in 1947 (2.0%) patients of which 227 (11.7%) were associated with SARS-CoV-2 infection. Patients who isolated pre-operatively were older, had more respiratory comorbidities and were more commonly from areas of high SARS-CoV-2 incidence and high-income countries. Although the overall rates of postoperative pulmonary complications were similar in those that isolated and those that did not (2.1% vs 2.0%, respectively), isolation was associated with higher rates of postoperative pulmonary complications after adjustment (adjusted OR 1.20, 95%CI 1.05–1.36, p = 0.005). Sensitivity analyses revealed no further differences when patients were categorised by: pre-operative testing; use of COVID-19-free pathways; or community SARS-CoV-2 prevalence. The rate of postoperative pulmonary complications increased with periods of isolation longer than 3 days, with an OR (95%CI) at 4–7 days or ≥ 8 days of 1.25 (1.04–1.48), p = 0.015 and 1.31 (1.11–1.55), p = 0.001, respectively. Isolation before elective surgery might be associated with a small but clinically important increased risk of postoperative pulmonary complications. Longer periods of isolation showed no reduction in the risk of postoperative pulmonary complications. These findings have significant implications for global provision of elective surgical care. We aimed to determine the impact of pre-operative isolation on postoperative pulmonary complications after elective surgery during the global SARS-CoV-2 pandemic. We performed an international prospective cohort study including patients undergoing elective surgery in October 2020. Isolation was defined as the period before surgery during which patients did not leave their house or receive visitors from outside their household. The primary outcome was postoperative pulmonary complications, adjusted in multivariable models for measured confounders. Pre-defined sub-group analyses were performed for the primary outcome. A total of 96,454 patients from 114 countries were included and overall, 26,948 (27.9%) patients isolated before surgery. Postoperative pulmonary complications were recorded in 1947 (2.0%) patients of which 227 (11.7%) were associated with SARS-CoV-2 infection. Patients who isolated pre-operatively were older, had more respiratory comorbidities and were more commonly from areas of high SARS-CoV-2 incidence and high-income countries. Although the overall rates of postoperative pulmonary complications were similar in those that isolated and those that did not (2.1% vs 2.0%, respectively), isolation was associated with higher rates of postoperative pulmonary complications after adjustment (adjusted OR 1.20, 95%CI 1.05–1.36, p = 0.005). Sensitivity analyses revealed no further differences when patients were categorised by: pre-operative testing; use of COVID-19-free pathways; or community SARS-CoV-2 prevalence. The rate of postoperative pulmonary complications increased with periods of isolation longer than 3 days, with an OR (95%CI) at 4–7 days or ≥ 8 days of 1.25 (1.04–1.48), p = 0.015 and 1.31 (1.11–1.55), p = 0.001, respectively. Isolation before elective surgery might be associated with a small but clinically important increased risk of postoperative pulmonary complications. Longer periods of isolation showed no reduction in the risk of postoperative pulmonary complications. These findings have significant implications for global provision of elective surgical care