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Mostrando ítems 121-140 de 390
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Diseño de un Sistema de Gestión integrado que cumpla con los requisitos de las normas NTC-ISO 9001:2015 y NTC-ISO 39001:2014
(BarranquillaSede Norte, 2020-06-01)Colombia se encuentra en una etapa de desarrollo económico en el que se observa un importante auge en el crecimiento y mejoramiento de la infraestructura de transporte terrestre. Como en todo elemento de orden nacional: ...
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Diseño e implementación de estrategias metacognitivas para el desarrollo de competencias investigativas en ciencias naturales en estudiantes de básica secundaria: Caso de estudio Colegio Americano de Barranquilla
(BarranquillaLicenciatura en Ciencias SocialesSede Norte, 2018-09-26)En los últimos años se ha incrementado notablemente la preocupación de educadores y psicólogos por abordar el problema del aprendizaje y del conocimiento desde la perspectiva de una participación activa de los sujetos, ...
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Diverging functional strategies but high sensitivity to an extreme drought in tropical dry forests
(BarranquillaMaestría en Ciencias AmbientalesSede Norte, 2020-12-14)Extreme drought events have negative effects on forest diversity and functioning. At the species level, however, these effects are still unclear, as species vary in their response to drought through specific functional ...
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Diversidad sexual en el departamento del Atlántico
(BarranquillaFilosofíaSede Norte, 2018-06-01)La investigación Diversidad sexual en el departamento del Atlántico es un aporte explicativo y reflexivo sobre la situación que vivencia la población en esta zona del país. Tiene como objetivo general identificar la vida ...
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Diversity of longhorned beetles (Coleoptera: Cerambycidae) in the Caribbean region of Colombia: temporal variation between two fragments of tropical dry forest
(BarranquillaBiologíaSede Norte, 2021-09-13)The tropical dry forest is under constant threat from many anthropic activities which are conducted indiscriminately, modifying the forest, and therefore, affecting species that are closely related to its phenology, ...
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Do-it-yourself methodology for calorimeter construction based in Arduino data acquisition device for introductory chemical laboratories
(BarranquillaSede Norte, 2020-03-10)Many experimental thermochemical laboratories require monitoring temperatures during a reaction or physical procedure. Nowadays, there are many alternatives to fulfill this requirement; however, they are expensive for basic ...
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Document details - Renormalization group improvement of the effective potential in a (1 + 1) dimensional Gross-Neveu model
(BarranquillaSede Norte, 2022-09-09)In this work, we investigate the consequences of the Renormalization Group Equation (RGE) in the determination of the effective potential and the study of Dynamical Symmetry Breaking (DSB) in an Gross-Neveu (GN) model with ...
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Ecología
(BarranquillaLicenciatura en Ciencias SocialesSede Norte, 2018-06-01)Este texto está diseñado para su utilización en cursos, introductorios de Ecología General. El libro resume el análisis de contenido realizado por los autores a varios referentes bibliográficos de ecología, utilizados a ...
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Economic and Exergo-Advance Analysis of aWaste Heat Recovery System Based on Regenerative Organic Rankine Cycle under Organic Fluids with Low GlobalWarming Potential
(BarranquillaIngeniería MecánicaSede Norte, 2020-03-12)The waste heat recovery system (WHRS) is a good alternative to provide a solution to the waste energy emanated in the exhaust gases of the internal combustion engine (ICE). Therefore, it is useful to carry out research ...
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Ecopathogenic complexes of American trypanosomiasis in endemic areas of Venezuela: Diagnosis and variability of Trypanosoma cruzi
(BarranquillaBiologíaSede Norte, 2019-08-21)Background & objectives: Trypanosoma cruzi, the causative agent of American trypanosomiasis, has been reported in 180 mammalian species and 154 triatomines species of Neotropic. This is a clonal parasite with variable ...
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Efectos oscilatorios de tipo óptico en la conductividad terahercios del grafeno
(BarranquillaSede Norte, 2018-06-01)En años recientes, después que fue posible separar la capa de grafeno de una estructura grafítica, un gran número de trabajos ha sido dedicado a estudiar este sistema debido a las propiedades no peculiares encontradas en ...
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Effect of Addition of Polyurea as an Aggregate in Mortars: Analysis of Microstructure and Strength
(BarranquillaLicenciatura en Ciencias NaturalesSede Norte, 2022-04-26)The addition of polymers in construction is a new tendency and an important step toward the production of structures with better functional properties. This work investigates the addition of polyurea (PU) as a polymeric ...
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Effect of Diesel Oil and Mixture of Alcohol-Glycol Ether on Colombian Ultrafine Coal Cleaning Using a Test-Rig Closed-Loop Flotation Column
(BarranquillaIngeniería MecánicaSede Norte, 2021-07-19)A test-rig closed-loop flotation column was used to observe the effect of diesel oil (collector) and Flomin F-425 (frother) on mass yield and ash content for two Colombian coals: Caypa (northern zone) and Guachinte ...
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Effect of Pretreatment with Low-Frequency Ultrasound on Quality Parameters in Gulupa (Passiflora edulis Sims) Pulp
(BarranquillaIngeniería QuímicaSede Norte, 2021-02-16)The Gulupa (Passiflora edulis f. edulis Sims) is an expression of South America’s tropics’ biodiversity, and a source of B vitamins and amino acids. It is a climacteric export fruit for which it is necessary to incorporate ...
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Effect of the Gallium and Vanadium on the Dibenzothiophene Hydrodesulfurization and Naphthalene Hydrogenation Activities Using Sulfided NiMo-V2O5/Al2O3-Ga2O3
(BarranquillaQuímicaSede Norte, 2020-08-07)The effect of Ga and V as support-modifier and promoter of NiMoV/Al2O3-Ga2O3 catalyst on hydrogenation (HYD) and hydrodesulfurization (HDS) activities was studied. The catalysts were characterized by elemental analysis, ...
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Effect of the Geometric Profile of Top Ring on the Tribological Characteristics of a Low-Displacement Diesel Engine
(BarranquillaIngeniería MecánicaSede Norte, 2020-08-11)The present study aims to analyze the influence of the geometric profile of the compression ring on the tribological properties of the lubricant. Additionally, the influence of the rotation speed and the engine load on ...
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Effect of Thermal Cycling on Abrasive Wear Response of Cu-1.9Be-0.25(Co+Ni) Alloy
(BarranquillaSede Norte, 2020-08-24)Cu-Be alloys are considered high strength alloys when containing 0.2% to 2% of Be per weight, 0.2% to 2.7% of Co per weight, and up to 2.2% of Ni per weight, since they can present an elastic limit higher than 1380 MPa ...
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Effects of agitation rate and dissolved oxygen on xylose reductase activity during xylitol production at bioreactor scale
(BarranquillaLicenciatura en Ciencias NaturalesSede Norte, 2022-01-05)The study of xylose reductase (XR) - one of the key enzymes in the production of xylitol - is important in the fermentation process to have maximum efficiency in the bioconversion of xylose to xylitol in lignocellulosic ...
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Effects of Different Concentrations of Arsine on the Synthesis and Final Properties of Polypropylene
(BarranquillaQuímicaSede Norte, 2022-07-31)This article studies the effects of arsine on the synthesis and thermal degradation of 4 samples of virgin polypropylene (PP-virgin) and proposes reaction mechanisms that allow understanding of its behaviour. Different ...
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Effects of Environmental Conditions on Photovoltaic Generation System Performance with Polycrystalline Panels
(BarranquillaSede Norte, 2021-10-31)Photovoltaic solar energy is the third most widely used renewable source worldwide, after hydroelectric and wind energy, and this energy source requires experimental and theoretical development in specific topics such as ...