38 research outputs found
Mejoramientos de envolvente para la eficiencia energética de viviendas en el centro-sur de Chile
This manuscript is part of the research project "Integrated Design for Energy Efficient Housing Reconstruction." It exposes the diagnosis of energy and construction conditions of dwellings of 3 regions in the south central area of Chile, which was the most affected by the earthquake of February 27th, 2010. With this aim, it reviews predominant characteristics of the building envelopes in 22 cities. It analyzes energy performance and it recommends thermal improvements for dwellings either under construction stage or during occupancy stage, which are critical for energy savings and efficiency. It proposes strategies to improve energy efficiency through vertical envelopes, with a base case and two comparative scenarios. It proposes economic, constructive and architectural planning strategies, with the possibilities of social and financial implementation, which could help substantially to achieve energy efficiency.Este manuscrito forma parte del proyecto “Diseño Integrado para la Reconstrucción de Viviendas Energéticamente Eficientes”. Presenta evaluación y diagnóstico de condiciones constructivas y energéticas de viviendas de las tres regiones más afectadas en el centro-sur de Chile por el terremoto del 27 febrero de 2010. A ese propósito revisa e identifica, en el marco de la normativa actual, las condiciones generales y características de las envolventes predominantes en viviendas de 22 ciudades; analiza su comportamiento energético y recomienda medidas de acondicionamiento térmico de viviendas en ejecución o en uso, decisivas para el ahorro y la eficiencia energética. Formula una estrategia de mejoramiento energético residencial en las envolventes verticales con una base y dos escenarios de análisis comparativos. Propone una planeación económica, constructiva y arquitectónicamente efectiva, con posibilidades de implementación social y financiera, que podría colaborar sustancialmente a la eficiencia energética
The risk of metabolic syndrome as a result of lifestyle among Ellisras rural young adults
The study aimed to investigate the association between metabolic syndrome (MetS) and lifestyle risk
factors among Ellisras
adults. A cross-sectional study was conducted on 624 adults (306 males and 318 females). MetS was
defined according to the criteria of the International Diabetes Federation. The prevalence of MetS
was 23.1% (8.6% males and 36.8 % females). Females appeared to have higher mean values for waist
circumference (WC), fasting blood glucose (FBG), total cholesterol (TCHOL) and low-density
lipoprotein cholesterol (LDL-C), while males had high mean values for high-density lipoprotein
cholesterol (HDL-C), triglycerides (TG), systolic blood pressure (SBP) and diastolic blood pressure
(DBP). No significant age and gender differences were observed for dietary intake. Significantly more
females (51.9%) presented with increased WC than males (4.6%). Participants who had a high dietary
energy intake were significantly less likely to present with larger WC (OR: 0.250 95% CI [0.161;
0.389]), low HDL-C (OR: 0.306 95% CI [0.220; 0.425]) and high LDL-C (OR: 0.583 95%
CI [0.418; 0.812]) but more likely to present with elevated FBG (OR: 1.01 95% CI [0.735; 1.386]),
high TCHOL (OR: 1.039
95% CI [0.575; 1.337]), high TG (OR: 1.186 95% CI [0.695; 2.023]) and hypertension (OR: 5.205 95%
CI [3.156; 8.585]).
After adjusting for age, gender, smoking, and alcohol status, high energy intake was more than two
times likely to predict MetS in adults with a large WC (OR: 2.766 95% CI [0.863; 3.477] and
elevated FBG (OR: 2.227 95% CI [1.051; 3.328]). Therefore, identifying groups that are at an
increased risk and those that are in their early stages of MetS will help improve
and prevent the increase of the MetS in the future
Detection Method for Liquid Metal Embrittlement Cracks Inside the Intermediate Sheet Zone of Dissimilar Resistance Spot Welds
Mejoramientos de envolvente para la eficiencia energética de viviendas en el centro-sur de Chile
Cohort study of cardiovascular risk in asymptomatic young adults: subclinical atherosclerosis and coronary calcium score
Abstract Coronary artery calcification is an early marker of subclinical atherosclerosis, but little research has been done in asymptomatic individuals under 45 years. In this cohort study with 17 years of follow-up, 155 participants were assessed in 2016 with a coronary calcium score for the association with cardiovascular risk factors. During follow-up, there was a significant increase in anthropometric measurements, cholesterol and fractions, and diastolic pressure. Participants who gained 1 cm in waist circumference had a mean reduction of 0.36 mg/dL in HDL-cholesterol and those who gained 1 kg/m2 in body mass index had a reduction of 0.72 mg/dL in HDL-cholesterol. Married participants had a 4.78 mg/dL reduction in HDL-cholesterol levels compared to singles. There was an increase of 2.09 mg/dL in HDL-cholesterol at each higher level of self-perceived health. One single case, a 32-year-old male, smoker, sedentary individual with a family history of cardiovascular disease, presented coronary calcification (0.6%). His HDL-cholesterol was reduced by 43.4%, with levels of less than 25 mg/dL at the time of coronary calcium scoring. Our findings may prompt broader studies of populations under 35 years with HDL-C levels below 25 mg/dL and family histories of cardiovascular disease, associated with obesity, sedentary lifestyle and smoking