Anna Włodarczyk, Nekane Basabe, Darío Páez Rovira, Loreto Villagrán, Carlos Reyes,
This study set out to incorporate the collective dimensions of posttraumatic growth and examined the construct and predictive validity of The Individual and Collective Posttraumatic Growth Scale (ICPTGS). Participants were 332 volunteers who had experienced the earthquake on February 27, 2010, in Chile. Analysis allowed us to confirm a multidimensional structure composed of four dimensions: individual, spiritual, communal growth, and societal growth. Additionally, we identified association among ...
Tópico(s): Grief, Bereavement, and Mental Health
2017 - Taylor & Francis | Journal of Loss and Trauma
Edwin Villagrán, Carlos Ricardo Bojacá, Mohammad Akrami,
The use of covered structures is an alternative increasingly used by farmers to increase crop yields per unit area compared to open field production. In Latin American countries such as Colombia, productive areas are located in with predominantly hillside soil conditions. In the last two decades, farmers have introduced cover structures adapted to these soil conditions, structures for which the behavior of factors that directly affect plant growth and development, such as microclimate, are still ...
Tópico(s): Light effects on plants
2021 - Multidisciplinary Digital Publishing Institute | Sustainability
Gabriela Nazar, Natalia Ulloa, María Adela Martínez-Sangüinetti, Ana María Leiva, Fanny Petermann‐Rocha, Ximena Díaz-Martínez, Fabián Lanuza, Igor Cigarroa, Yeny Concha-Cisternas, Claudia Troncoso-Pantoja, Lorena Mardones, Marcelo Villagrán, Carlos Celis‐Morales,
Background: Depression has been previously associated with cognitive impairment in high income country populations. However, its association in the Chilean population has not been investigated.
Tópico(s): Aging, Health, and Disability
2020 - Q16635223 | Revista médica de Chile
Edwin Villagrán, Carlos Ricardo Bojacá,
Abstract Carnation production in Colombia, the world’s main exporter, takes place entirely in naturally ventilated greenhouses. This type of structure presents non-homogeneous microclimate conditions which differentially affect crop growth and development, which is why this issue has been of great research interest in recent years. The objective was to determine the microclimatic behavior of a passive spatial-type greenhouse used in Colombia for carnation production. The experimental approach included ...
Tópico(s): Plant Water Relations and Carbon Dynamics
2020 - Sociedade Brasileira de Floricultura e Plantas Ornamentais | Ornamental Horticulture
Edwin Villagrán, Carlos Ricardo Bojacá,
In tropical regions the production of ornamentals is developed exclusively in naturally ventilated plastic greenhouses, which sometimes leads to inappropriate microclimates with high temperatures and humidity that limit the productive development of plants. The aim of this work was to study air flows, temperature distribution and relative humidity inside an alternative greenhouse designed to produce rose (Rosa spp.). Three configurations of ventilation, side ventilation (SV), roof ventilation (RC) ...
Tópico(s): Greenhouse Technology and Climate Control
2019 - Sociedade Brasileira de Floricultura e Plantas Ornamentais | Ornamental Horticulture
Edwin Villagrán, Carlos Ricardo Bojacá,
Abstract In passive plastic greenhouses that do not have heating systems, the phenomenon of thermal inversion occurs, which means that the temperature inside the greenhouse is lower than the outdoor environment; therefore, the plants are exposed to thermal conditions that are unsuitable for production. The aim of this work was to evaluate passive air climatization alternatives seeking to optimize the nocturnal microclimate of a multi-tunnel Gothic greenhouse projected for rose production in Bogota ...
Tópico(s): Light effects on plants
2019 - Sociedade Brasileira de Floricultura e Plantas Ornamentais | Ornamental Horticulture
Edwin Villagrán, Carlos Aldana,
The protected horticultural production in tropical countries such as Colombia takes place mainly under passively ventilated greenhouses.The major drawback of the traditional Colombian greenhouse is its low ventilation rate leading to inadequate microclimates.The purpose of this study was to evaluate the airflow behavior, ventilation rates and thermal distribution effects of a commercial-size greenhouse, due to the gradual increase of the roof ventilation areas.A numerical simulation model was developed ...
Tópico(s): Light effects on plants
2019 - International Information and Engineering Technology Association | International Journal of Heat and Technology
Edwin Villagrán, Carlos Ricardo Bojacá,
The growing expansion of protected horticulture in many regions is occurring around densely populated areas where land for agriculture is scarce, expensive or is used for other purposes. Inexpensive plastic passively ventilated greenhouses are the common choice for protected cultivation in these developing regions. The objective of this work was to analyse the effect of surrounding constructions and natural obstacles on the thermal performance of two naturally ventilated greenhouses. A saw tooth ...
Tópico(s): Urban Heat Island Mitigation
2019 - PAGEPress (Italy) | Journal of Agricultural Engineering
Loreto Villagrán, Carlos Reyes, Anna Włodarczyk, Darío Páez Rovira,
Afrontamiento comunal, crecimiento postraumático colectivo y bienestar social en el contexto del
Tópico(s): Suicide and Self-Harm Studies
2014 - | Terapia psicológica
Produção Nacional
Revisado por pares
Ximena S. Villagrán, Carlos Ernesto Gonçalves Reynaud Schaefer, Bertrand Ligouis,
Few geoarchaeological studies have been conducted in the Antarctic continent. This paper contains the first results of the geoarchaeological research done in two sealing sites dated from the 19th century, located in Byers Peninsula, South Shetland Islands (Antarctica). The research is part of a wider international project that aims at understanding the daily practices of the first anonymous occupants of Antarctica, and the insertion of the continent into the world system. The geoarchaeological study ...
Tópico(s): Indigenous Studies and Ecology
2013 - Elsevier BV | Quaternary International
X. Reynafarje, Edwin Villagrán, Carlos Ricardo Bojacá, Rodrigo Gil, Eddie Schrevens,
Tópico(s): Urban Heat Island Mitigation
2020 - International Society for Horticultural Science | Acta Horticulturae
Edwin Villagrán, Carlos Ricardo Bojacá,
The thermal efficiency of naturally ventilated greenhouses is limited due to the permanent exchange of air through the vents, especially during the night hours. The objective of the work consisted in evaluating a system of inflatable air ducts that close the roof vents during the night as a strategy to reduce the energy loss during these hours. For the development of this work, we applied the computational fluid dynamics (CFD) method to a passive multi span greenhouse operating under the dominant ...
Tópico(s): Urban Heat Island Mitigation
2020 - UNIVERSIDADE FEDERAL DE VIÇOSA | Revista CERES
Edwin Villagrán, Carlos Ricardo Bojacá,
Abstract The spatial behavior of the environmental variables involved in rose production is one of the factors of greatest current interest in the Colombian ornamental sector. The aim of this work consisted in the evaluation of a passive greenhouse through an experimental approach that included the capture and recording of data through a grid of 40 sensors homogeneously distributed inside the greenhouse. The data processing was carried out through the application of geostatistical techniques that ...
Tópico(s): Leaf Properties and Growth Measurement
2020 - Sociedade Brasileira de Floricultura e Plantas Ornamentais | Ornamental Horticulture
Yvonne Walz, Annika Min, Karen Dall, Moses Duguru, Juan-Carlos Villagran de Leon, Valerie Graw, Olena Dubovyk, Zita Sebesvári, Andries Jordaan, Joachim Post,
The Sendai Framework for Disaster Risk Reduction (SFDRR) was adopted by 187 countries and offers a tangible agenda for evidence-based policy for disaster risk reduction as an integral part of the overall post-2015 global development agenda. The progress of implementation of the seven Global Sendai Targets at the national level is tracked by a set of 38 indicators. However, despite the formal commitment, the majority of countries is currently not in the position to monitor the implementation of the ...
Tópico(s): Climate change impacts on agriculture
2019 - Elsevier BV | Progress in Disaster Science
Manuel Carnero, Luis Maroto, Javier Cobiella-Carnicer, Isidre Vilacosta, Luis Nombela‐Franco, Alí Alswies, Enrique Villagrán-Medinilla, Carlos Macaya,
OBJECTIVES: The evidence of the benefits of transcatheter aortic valve replacement (TAVR) or surgical aortic valve replacement (SAVR) for patients of high or intermediate surgical risk is not consistent. We performed a meta-analysis to compare major adverse outcomes after TAVR or SAVR. METHODS: We searched propensity score matched studies or randomized clinical trials comparing the risks of mortality, stroke, major bleeding, acute renal injury, pacemaker implantation, vascular complications and prostheses ...
Tópico(s): Cardiovascular Function and Risk Factors
2016 - Oxford University Press | European Journal of Cardio-Thoracic Surgery
... Annika Min, Karen Dall, Moses Duguru and Juan-Carlos Villagran de Leon et al.1 Jan 2020 | Progress ...
Tópico(s): Flood Risk Assessment and Management
2015 - World Scientific | Journal of Extreme Events
Thomas Zschocke, Juan Carlos Villagrán de León,
One of the priority areas of the Hyogo Framework for Action 2005-2015 for disaster risk reduction is the use of knowledge, innovation and education to build a culture of safety and resilience at all levels. The collection, compilation and dissemination of relevant information and knowledge on disaster risks and to cope with such risks are critical to inform and educate individuals as a basis on which to establish a culture of disaster prevention and resilience. However, in many cases these resources ...
Tópico(s): Geographic Information Systems Studies
2010 - Springer Science+Business Media | Communications in computer and information science
Pablo García‐Solís, Reyes‐Bastidas Marissa, Karla Flores, Olga P. García, Jorge L. Rosado, Lorena Méndez-Villa, María Carlota García Gutiérrez, David Gustavo García-Gutiérrez, Aarón Kuri-García, Hebert Luis Hernández‐Montiel, Soriano‐Leon Ofelia, María Elena Villagrán-Herrera, Juan Carlos Solís‐S,
Childhood overweight and obesity are worldwide public health problems and risk factors for chronic diseases. The presence of SNP in several genes has been associated with the presence of obesity. A total of 580 children (8-13 years old) from Queretaro, Mexico, participated in this cross-sectional study, which evaluated the associations of rs9939609 (fat mass obesity-associated (FTO)), rs17782313 (melanocortin 4 receptor (MC4R)) and rs6548238 (transmembrane protein 18 (TMEM18)) SNP with obesity and metabolic ...
Tópico(s): Genetic Associations and Epidemiology
2016 - Cambridge University Press | British Journal Of Nutrition
Ester Garrido Viñado, Irene Lizano‐Díez, Pere N. Roset Arissó, José María Villagrán Moreno, Carlos Mur de Viu Bernad,
La agitación de origen psiquiátrico ocurre principalmente en pacientes con trastornos psicóticos como la esquizofrenia, el trastorno esquizoafectivo y la fase maníaca del trastorno bipolar. Los métodos tradicionales para el control de los pacientes agitados incluyen la contención verbal, la contención farmacológica y la contención mecánica. En este estudio se ha estimado el coste directo sanitario asociado a la aplicación de las técnicas de contención mecánica de origen psiquiátrico en España. La ...
Tópico(s): Psychopathy, Forensic Psychiatry, Sexual Offending
2015 - Elsevier BV | Psiquiatría Biológica
Estíbaliz Aragón Mendizábal, Gamal Cerda, Manuel Aguilar Villagrán, Carlos Mera, José Ignacio Navarro Guzmán,
Tópico(s): Reading and Literacy Development
2020 - Springer Science+Business Media | European Journal of Psychology of Education
Edwin Villagrán, Carlos Ricardo Bojacá, Niccole Alejandra Rojas Bahamon,
En Colombia, la producción de flores se lleva a cabo en invernaderos de diferentes tipos y formas geométricas, pero con la una característica común de usar ventilación natural, para control de clima. En la actualidad, el conocimiento sobre el desempeño climático de estas estructuras es escaso. El objetivo del trabajo consistió en evaluar el comportamiento térmico de un invernadero espacial en condiciones de clima diurno y nocturno. La evaluación realizada, mediante modelado computacional, empleó ...
Tópico(s): Urban Heat Island Mitigation
2018 - University of Applied and Environmental Sciences | Revista U D C A Actualidad & Divulgación Científica
Yanet Quijada, Loreto Villagrán, Pamela Vaccari, Carlos Reyes, Luz Dary Gallardo,
The results of a comparative study of social inequality and mental health show that Chile and Colombia, which have enormous social gaps despite their economic growth, are characterized by poor mental health indicators and social discontent, while the better equity indicators in Ecuador are not clearly linked to mental health. The concept of social defeat is suggested as a mediator between social inequality and individual and collective mental health, and participation and empowerment are suggested ...
Tópico(s): Resilience and Mental Health
2018 - SAGE Publishing | Latin American Perspectives
Norma Dávila, Alexander Ariza Pastrana, Lizeth Caballero, Juan Carlos Villagrán de León, Antulio Zaragoza Alvarez, Leobardo Dominguez Morales, Xanat Antonio Némiga, Gustavo Dominguez Posadas,
Tópico(s): earthquake and tectonic studies
2021 - Springer Science+Business Media | Landslides
Edwin Villagrán, Carlos Ricardo Bojacá,
En Colombia, la producción de rosa (Rosa sp.) se desarrolla en un alto porcentaje en invernaderos ventilados en forma natural. El objetivo de este trabajo consistió en desarrollar una caracterización del microclima generado en el interior de un invernadero a través de la modelación numérica de los flujos de aire mediante un software CFD (Computational Fluids Dynamics) de volúmenes finitos. El modelo CFD-3D utilizado fue validado mediante recopilación de datos experimentales, y se compararon datos ...
Tópico(s): Plant and soil sciences
2019 - University of Concepción | Chilean journal of agricultural & animal science
Alessandro Bartoloni, Lucia Pallecchi, Eleonora Riccobono, Antonia Mantella, Donata Magnelli, T. Di Maggio, A.L. Villagran, Yosleidys Rivero Lara, Carlos Saavedra, M. Strohmeyer, Filippo Bartalesi, Christian Trigoso, Gian María Rossolini,
Abstract Previous studies on commensal Escherichia coli from healthy children in the Bolivian Chaco have shown remarkable resistance rates to the old antibiotics since the early 1990s, and the emergence of resistance to newer drugs (fluoroquinolones and expanded-spectrum cephalosporins) in the 2000s. Here we report the results of a new survey conducted in 2011 in the same setting. Rectal swabs were obtained from 482 healthy children (aged 6–72 months) from three urban areas of the Bolivian Chaco. Screening ...
Tópico(s): Antibiotics Pharmacokinetics and Efficacy
2012 - Elsevier BV | Clinical Microbiology and Infection
Seiichi Ikeda, Carlos Tercero Villagran, Toshio Fukuda, Yuta Okada, Fumihito Arai, Makoto Negoro, Motoharu Hayakawa, Ikuo Takahashi,
Endovascular intervention using interventional radiology (IVR) is most commonly used in cerebralvascular treatment. Medical imaging such as digital subtraction angiography (DSA) and vascular mapping make vasculature and catheters easier to read from fluoroscopy during endovascular intervention. We propose simulating IVR using augmented reality, reproducing fluoroscopic images and a patient-specific blood vessel model without X-ray imaging. The advantages of the patient-specific vascular model reproducing ...
Tópico(s): Surgical Simulation and Training
2008 - Fuji Technology Press Ltd. | Journal of Robotics and Mechatronics
Carlos Celis‐Morales, Fernando Rodríguez‐Rodríguez, María Adela Martínez-Sangüinetti, Ana María Leiva, Claudia Troncoso-Pantoja, Marcelo Villagrán, Carlos Salas-Bravo, Ximena Díaz-Martínez, Igor Cigarroa, Yeny Concha-Cisternas, Cristián Álvarez, A. Beltrán, Jaime Vásquez-Gómez, Gustavo Pavéz-Adasme, Cristián Luarte-Rocha, Edgardo Molina Sotomayor, Aquiles Yáñez‐Silva, Álex Garrido-Méndez, Carlos Matus-Castillo, Fanny Petermann‐Rocha,
Tópico(s): Public Health and Environmental Issues
2019 - Elsevier BV | Revista Médica Clínica Las Condes
Produção Nacional
Ximena S. Villagrán, Luiz Carlos Ruiz Pessenda, Henrique Antônio Valadares Costa, Tiago Atorre, Igor da Silva Erler, André Strauss, Alberto Barioni, Daniela Klökler, Anderson Tognoli, Carlos Duarte, Paulo Vinicius Bonfim, Kita Macário,
Resumo Os sambaquis do litoral do Espírito Santo foram pouco estudados pelas pesquisas arqueológicas realizadas no estado. Apesar de serem conhecidos desde finais do século XIX, foram recorrentemente considerados uma extensão marginal dos desenvolvimentos culturais que aconteciam no Rio de Janeiro. À escassez de informações sobre as características dos sítios, soma-se a ausência de datações 14C bem referenciadas, as quais impedem o entendimento da profundidade temporal e da evolução da ocupação ...
Tópico(s): Archaeology and ancient environmental studies
2018 - MUSEU PARAENSE EMÍLIO GOELDI | Boletim do Museu Paraense Emílio Goeldi Ciências Humanas
Alejandra C. Villagrán-Olivares, Manuel F. Gómez, Carlos A. López, Mariana N. Barroso, M. Cristina Abello,
Ni supported catalysts were prepared by an EDTA complexing method with different EDTA/Ni molar ratios: 0, 0.5, 1 and 2. The catalysts were characterised by X-ray diffraction, adsorption-desorption isotherms of N2, infrared spectroscopy, thermogravimetric analysis, temperature programmed reduction and X-ray photoelectron spectroscopy. All the catalysts prepared with EDTA presented a decrease in the NiO particle size of around 60 % with respect to the sample obtained in the absence of a chelating agent. ...
Tópico(s): Catalysis and Oxidation Reactions
2019 - Elsevier BV | Applied Catalysis B Environment and Energy
Edwin Villagrán, E.J. Baeza Romero, Carlos Ricardo Bojacá,
The microclimate of naturally ventilated greenhouses, which are extensively used in tropical regions to produce various food or commercial crops, is highly dependent on the efficiency of ventilation that varies according to the local climate and the main characteristics of the greenhouse. Numerical simulation facilitates the spatial analysis of air flows for different types of greenhouse and their effect on the internal microclimate. The objective of this work focused on the use of a transient CFD- ...
Tópico(s): Urban Heat Island Mitigation
2019 - Elsevier BV | Biosystems Engineering