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Mostrando publicaciones 1540-1559 de 3248
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Gráficos estadísticos en libros de texto de matemáticas para la educación primaria mexicana
(2020)Se reportan resultados de una investigación acerca del tipo de gráfico, nivel de lectura, nivel de complejidad semiótica y conflicto semiótico, identificado en las actividades relacionadas con gráficos estadísticos ...
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Gráficos estadísticos en libros de texto: un estudio comparativo en el primer curso de educación primaria en Brasil y Chile
(2020)En este trabajo describimos los resultados de un estudio comparativo sobre las actividades en que intervienen gráficos estadísticos en libros de texto del primer año de Educación Primaria de Brasil y Chile (6 y 7 años ...
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Green polymeric nanomaterials for the photocatalytic degradation of dyes: a review
(2020)Pure and drinkable water will be rarer and more expensive as the result of pollution induced by industrialisation, urbanisation and population growth. Among the numerous sources of water pollution, the textile industry has ...
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Green synthesis of silver nanoparticles using exopolysaccharides produced by bacillus anthracis PFAB2 and its biocidal property
(2021)Nowadays when control of environmental toxicity is a matter of concern, the focus of the researchers is to find an eco-friendly process. Considering the hazards associated with chemical synthesis of nanoparticles, green ...
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Green, yellow or black? Genetic differentiation and adaptation signatures in a highly migratory marine turtle
(2021)Marine species may exhibit genetic structure accompanied by phenotypic differentiation related to adaptation despite their high mobility. Two shape-based morphotypes have been identified for the green turtle (Chelonia ...
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Growth and biomass partitioning of nine provenances of Quillaja saponaria seedlings to water stress
(2019)Information on the morphological and physiological responses of seedlings to stressors, such as water stress, is required for successful early establishment of seedlings. We examined provenance variation in morphological ...
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Growth and physiological acclimation to shade in young plants of adesmia bijuga phil., a critically endangered species in central Chile
(2021)Adesmia bijuga Phil. is an endemic and endangered shrub species of central Chile. Its potential shade intolerance is one of the leading hypotheses for its vigor loss when the species grows beneath closed canopies. The ...
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Growth of provenances of cryptocarya alba during water stress and after re–watering in the nursery
(2021)Intensification of drought in Mediterranean–type climates has limited seedling establishment. The knowledge of the ecology of selected species and its intraspecific variation to water stress at the seedling stage should ...
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Growth of radiata pine families in nursery and two years after field establishment
(2020)Pinus radiata D. Don is the most widely planted exotic species in Australia, Chile, New Zealand and Spain. In this study, growth and survival of P. radiata were compared in 30 open pollinated families grown under two ...
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Gynecological–endocrinological aspects in women carriers of BRCA1/2 gene mutations
(2018)Women carriers of mutations in the genes BRCA1 and BRCA2 coding for tumor suppressor proteins are at high risk of developing breast and ovarian cancers. Hereditary breast and ovarian cancers due to BRCA pathogenic mutations ...
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H2 control and filtering of discrete-time lpv systems exploring statistical information of the time-varying parameters
(2020)This paper introduces a new strategy to improve performance in gain-scheduled control and filtering for LPV systems exploiting statistical information about the time-varying parameters whenever available. The novelty of ...
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H2 gain-scheduled design subject to inexact measurements: performance comparison of two models for additive uncertainty
(2019)This paper investigates the problem of H2 gain-scheduled design (control and filtering) for LPV systems where the scheduling parameters are affected by additive noises. The purpose is to analyze the impact on the H2 ...
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Habilidades profesionales asociadas a la docencia. Fijando posiciones de profesores en formación
(2018)La investigación tiene por novedad aproximarse a la profesionalidad que se construye en el interior de la personalidad del profesor en formación, utilizando la metáfora de la “posición” para hacer visibles y poner en tela ...
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Habilidades y procesos de investigación científica en textos escolares de ciencias naturales de 7° y 8° año
(2023)Para la enseñanza de las Ciencias Naturales en el nivel básico de Chile, se dispone de 2 textos escolares ofrecidos por la autoridad y política educacional para 7° y 8° año, los cuales son analizados en esta investigación. ...
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Hairy black holes in disformal scalar-tensor gravity theories
(2021)We show that the no-hair theorem for scalar-tensor theories with bimetric structure can be evaded. We find that hairy black hole solutions in the presence of an electric charge admit anti-de Sitter (AdS), flat or de Sitter ...
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Hand grip strength and maximum peak expiratory flow: determinants of bone mineral density of adolescent students
(2018)Background: Maintaining and building healthy bones during the lifetime requires a complicated interaction between a number of physiological and lifestyle factors. Our goal of this study was to analyze the association between ...
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Harvest labor quality and productivity: Case study of cherry growing in Chile
(2015)In Chile, the cherry tree has been one of the fastest growing and most profitable crops in the last ten years. However, increasing production costs, the scarcity of hired labor, and unfavorable exchange rates have reduced ...
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¿Hay que formar a los docentes en políticas educativas?
Ferrada, Donatila
; ; (2018)
Esta investigación da cuenta de la formación inicial docente en política educativa por medio de la construcción de cinco estudios de casos situados en la región del Biobío, Chile. Tres de ellos con actores de la formación ...
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Hábitos de actividad física asociados a variables de salud en escolares chilenos varones
(2024)Introducción: La inactividad física es un factor que contribuye al aumento del riesgo cardiometabólico, como el sobrepeso y la obesidad en escolares. Objetivo: Asociar los hábitos de actividad física con variables ...
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Health effects of pesticide exposure in latin american and the caribbean populations: a scoping review
(2022)Background: Multiple epidemiological studies have shown that exposure to pesticides is associated with adverse health outcomes. However, the literature on pesticide-related health effects in the Latin American and the ...