Artículos: Envíos recientes
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Improved Mg–Al–Zn Magnesium Alloys Produced by High Energy Milling and Hot Sintering
Abstract: Powders of commercially pure magnesium (c.p. Mg), AZ91 magnesium alloy and zinc were milled using a high-energy mill. The effect of high energy milling (HEM) on powders morphology, chemical composition, crystallite ... -
IlluminApp: Educational support tool for sustainable indoor illumination system reconversion for household applications
The illumination household represents an important percentage of electricity consumption in developing countries. The electricity consumption derived from residential illumination is strongly reduced by assuming cleaner ... -
Effects of single vacancy on electronic properties of blue-phosphorene nanotubes
We investigate the electronic properties of blue-phosphorene nanotubes using density functional theory first-principle calculations, taking into account, in particular, the presence of atom vacancies in the structure. The ... -
Identifying molecularly defined antigens for a Histoplasma capsulatum-specific interferon gamma release assay [Identificación de antígenos definidos molecularmente para un ensayo de liberación de interferón-gamma específico para Histoplasma capsulatum]
Background: In a previous work we showed the feasibility of an interferon gamma release assay (IGRA) for detecting latent infection by Histoplasma capsulatum. While in that proof-of-concept study we used crude fungal ... -
Human Atrial Electrophysiological Models Under Fractional Derivative: Depolarization and Repolarization Dynamics During Normal and Fibrillation Conditions
Atrial fibrillation (AF) is the most common arrhythmia within the clinical context. Advanced stages of the AF involve several difficulties in its management and treatment. This occurs mostly because the initiation and ... -
Horizontal inequality with democracy in Mexico and Colombia [Desigualdad horizontal y democracia con desigualdad en México y Colombia]
Mexico and Colombia are two countries that, despite their notable differences in terms of state structuring and nation consolidation, have enormous similarities in their cultural violence that produce social closures and ... -
Foresight of the agroindustrial engineering to 2035 - Application of the delphi method as a dynamizer of curricular changes [Prospectiva de la ingeniería agroindustrial a 2035 - Aplicación del método Delphi como dinamizador de cambios curriculares]
The purpose of this article is to present the results of the application of the first Delphi round for Faculties of Agroindustrial Engineering in the framework of a prospective project, the objective was to establish ... -
First report of Fusarium oxysporum causing vascular wilt of Stevia rebaudiana in Colombia
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Grain Size Reduction Effect on Structural and Magnetic Properties in La1-xSrxMnO3 (x = 0.3 y 0.4) by Mechanical Ball Milling
We have investigated the magnetic, structural and morphological properties of ferromagnetic phases of manganite La1-xSrxMnO3 with x = 0.3 (LSMO-30) and x = 0.4 (LSMO-40) prepared by solid state reaction method, and then ... -
Green synthesis of magnetic nanoparticles using leaf extracts of Aloe vera and Kalanchoe daigremontiana to remove divalent mercury from natural waters
In this study, magnetic nanoparticles of magnetite were prepared by an eco-friendly method using aqueous leaf extracts of Aloe vera and Kalanchoe daigremontiana. These vegetal extracts have suitable characteristics such ... -
Evaluation of climate change adaptation in the energy generation sector in Colombia via a composite index — A monitoring tool for government policies and actions
The aim of the article is to evaluate the national adaptation to climate change in the energy generation sector in Colombia via a composite index. To build an index, a framework by stages is used, which includes the ... -
Extension of the Systemic Entrepreneurship Intention Model in university students
The extension of the Systemic Entrepreneurship Intention Model, to identify and understand the factors, and their relations, that promote university students' entrepreneurial intention, was proposed in this paper. That is, ... -
Experimental study of turbulent syngas/methane/air flames at a sub-atmospheric condition
The aim of this work was determined turbulent burning velocities of air-syngas-methane flames at sub-atmospheric conditions using the angle method and Schlieren imaging. We analyzed a high hydrogen content syngas that can ... -
Effect of the hydrostatic pressure and shell's Al composition in the intraband absorption coefficient for core/shell spherical GaAs/AlxGa1?xAs quantum dots
In this paper we theoretically investigate the role of hydrostatic pressure by analyzing its influence on potential barrier's height in GaAs/AlxGa1?xAs core/shell spherical quantum dots. The values of hydrostatic pressure ... -
Effect of pH on Dimethylamine Borane Reduced Electroless Nickel Deposits on AISI/SAE 1045 Steel Surface
Abstract: Electroless Ni B coatings using DMAB-reduced plating baths at different pH conditions were formed on AISI/SAE 1045 carbon steel. Substrates were grit-blasted with alumina, generating a rough surface suitable for ... -
Effect of population dynamics and land use on the contribution of sediments to reservoirs for hydropower generation
Sediment load in reservoirs causes loss of reservoir storage and reduces its usable life. There are management strategies focused in sediment removal or reducing trapping in reservoirs, and there are basin management ... -
Effect of Sparse Doping in Barriers on the Energy Structure of Center-Delta-Doped QW
Effect of sparse (presumably background) shallow donor impurity on the energy structure of SiGe/Si quantum well structure delta-doped to the center of the well is studied numerically. The method includes calculation of ... -
Effect of Acute Physical Exercise on Executive Functions and Emotional Recognition: Analysis of Moderate to High Intensity in Young Adults
Physical exercise (PE) is associated with cognitive changes and brain function. However, it is required to clarify the effect of PE in different intensities, population groups conditions and the EF duration over different ... -
Decision making and criminal responsibility regarding money laundering in Ecuador [Toma de decisiones y responsabilidad penal frente al lavado de activos en Ecuador]
Money laundering is a transnational criminal phenomenon that affects countries within a globalized economy. In Ecuador, when the Integral Organic Code (COIP) comes into force in 2014, this conduct is sanctioned more severely ... -
Design and Construction of a Muon Detector Prototype for Study the Galeras Volcano Internal Structure
Muon tomography is a technique based on the observation of the absorption of muons in matter, as the ordinary radiography does using X-rays. The interaction of cosmic rays with the atmosphere produce Extensive Air Showers, ...