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Mostrando publicaciones 5099-5118 de 5138
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Volatiles from Lapageria rosea Ruiz et Pav. red flower
; abril, diana
; ; ; (2013)
The chemical composition of the volatile compounds isolated by simultaneous distillation–extraction with diethyl ether from red flowers of red copihue (Lapageria rosea) growing in Chile was investigated by gas ...
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Volatility spillover between the cryptocurrency market, financial markets and commodities
(2023)El objetivo de este trabajo es analizar el efecto spillover entre el mercado de las criptomonedas, los mercados financieros y commodities, utilizando índices de volatilidad realizada de las diez criptomonedas con mayor ...
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Vulnerabilidad del sistema financiero chileno, frente los últimos avances en la tecnología de la información y comunicaciones a nivel mundial, que facilitan el lavado de dinero
(Universidad Católica del Maule, Facultad de Ciencias Sociales y Económicas, 2009)Esta tesis presenta los antecedentes que explican la evolución del lavado de dinero en Chile. Además, analiza la información existente y, determina, qué tecnología de la información y las comunicaciones facilitan el lavado ...
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Waist circumferences of chilean students: Comparison of the CDC-2012 standard and proposed percentile curves
(2015)The measurement of waist circumference (WC) is considered to be an important means to control overweight and obesity in children and adolescents. The objectives of the study were to (a) compare the WC measurements of Chilean ...
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Walking behavior of older adults in Temuco, Chile: the contribution of the built environment and socio-demographic factors
(2022)The amount of walking for daily transport has decreased significantly over the last decades in Temuco, Chile. Moreover, the percentage of older adults (aged over 65) who did not meet the recommendations of at least 150 min ...
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Walking toward metro stations. The contribution of distance, attitudes, and perceived built environment
(2020)Walking as an active means of travel is important as a sustainable mode of transport. Moreover, the level of walking in the surrounding areas of metro stations would contribute to maintaining the minimum rate of physical ...
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Warm-up stretching exercises and physical performance of youth soccer players
(2023)This study aims to compare the effects of standard warm-up versus warm-up using stretching exercises on the physical performance of male youth soccer players. Eighty-five male soccer players (age: 10.3 ± 4.3 years; body ...
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Water and temperature ecophysiological challenges of forests plantations under climate change
(2024)Climate change has impacted the environmental conditions in which forest plantations grow worldwide. Droughts and extreme temperatures have compromised the survival and productivity of plantations, and the effects on carbon ...
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Water status estimation of cherry trees using infrared thermal imagery coupled with supervised machine learning modeling
Carrasco-Benavides, Marcos; ; ; ; ; Mora, Marco ; (2022)
The implementation of artificial intelligence (AI) in parallel with remote sensing could be a powerful tool to manage irrigation scheduling on crops with narrow thresholds between water stress levels, such as cherry trees. ...
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Web-based personal access control system using facial recognition with deep learning techniques
(2022)This paper presents a web application to control personnel access to a work area without contact; this makes it ideal to help combat the Covid-19 health emergency. For its implementation, deep learning and computer vision ...
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Weight, height and body mass index of children and adolescents living at moderate altitude in Colombia
(2018)Introduction. There is increasing concern over the study of physical growth in different regions of the world, although altitude is not considered an adjustment factor. Objectives. Compare physical growth variables and ...
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What are the factors explaining pesticide sprayings on grapevines? A comparison of 440 plots belonging to three wine valleys of Chile
(2021)Spraying pesticides on grape skins is a common practice in vineyards, which has negative impacts on the environment and generates public health challenges. This work aims to identify the factors that explain the intensity ...
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What can insects tell us about the use of pesticides? the detection and quantification of chlorpyrifos via QuEChERS and HEADSPACE-SPME methods using GC/MS/MS
(2024)The global use of pesticides, exceeding 4 million tons annually, poses substantial threats to public health and the environment. Numerous studies emphasize the correlation between pesticide exposure, genotoxicity, and ...
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What constitutes a ‘classroom problem’ for today's teacher?: an exploratory study
(2023)Teachers face situations that are difficult to solve, which affect their practices in the classroom. Teachers´ability to face problematic situations been related to educators' adaptive and metacognitive capacity. This study ...
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What dimensions of risk perception are associated with avoidance of buying processed foods with warning labels?
(2020)Nutritional Warning Labels (NWLs) inform consumers about processed foods that exceed critical nutrient levels activating the risk perception in consumers. However, this information is limited. The objective was to identify ...
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What hides Chile’s electricity mix data: a data science perspective
(2022)In the context of decarbonization and fossil fuel independence, Chile has a great task ahead. The most relevant is to become carbon neutral by 2050 by replacing fossil fuels with clean energy sources, where, besides ...
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What if the cold days return? epigenetic mechanisms in plants to cold tolerance
(2021)Low temperatures are one of the most critical environmental conditions that negatively affect the growth, development, and geographic distribution of plants. Exposure to low temperatures results in a suit of physiological, ...
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What is post-COVID-19 syndrome? Definition and update
(2022)Este trabajo aborda el origen y el desarrollo del síndrome pos-COVID-19, el cual consiste en la persistencia a través del tiempo de diferentes síntomas como consecuencia de la infección por SARS-CoV-2. A partir de una ...
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What is the influence of randomisation sequence generation and allocation concealment on treatment effects of physical therapy trials? A meta-epidemiological study
(2015)Objective: To determine if adequacy of randomisation and allocation concealment is associated with changes in effect sizes (ES) when comparing physical therapy (PT) trials with and without these methodological characteristics. ...
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What learning opportunities does the Chilean primary education curriculum offer to train in sustainability?
(2022)Education is a fundamental tool to make a country's society equitable, just, and respectful of the environment. As primary education is compulsory for a country's population, it allows building knowledge and skills to ...