Listar Artículos de investigación por título
Mostrando ítems 88-107 de 248
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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 ...
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Effects of shoulder geometry of tool on microstructure and mechanical properties of friction stir welded joints of AA1100 aluminum alloy1
(BarranquillaIngeniería MecánicaSede Norte, 2018-11-04)In this work were studied the effects of shoulder geometry of tool on microstructure evolution and mechanical properties of friction stir welded joints of AA1100 aluminum alloy using a milling machine. Three designs of ...
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Eficiencia de la difracción de un sistema de modulación acusto-óptico de doble paso
(BarranquillaSede Norte, 2021-01-18)Se describe la caracterización de un sistema de modulación acusto-óptico y la optimización del set up para mejorar la eficiencia de la difracción en configuraciones de paso simple y doble. En la configuración de paso ...
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Elaphidiini (Coleoptera, Cerambycidae) from the Caribbean region of Colombia: New species, taxonomic notes and new geographical records
(BarranquillaBiologíaSede Norte, 2020-03-04)Two new species of Elaphidiini from Colombia are described: Sphaerion costae sp. nov., and Mephritus costae sp. nov. The keys to species of Sphaerion Audinet-Serville, 1834 and Mephritus Pascoe, 1866 are translated and ...
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Emerging contaminants as global environmental hazards. A bibliometric analysis
(BarranquillaSede Norte, 2020-05-18)This paper presents a bibliometric analysis of peer-reviewed scientific literature on emerging contaminants published from 2000 through 2019. A total of 4968 documents (among research articles and review papers) collected ...
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Energy, Economic, and Environmental Evaluation of a Proposed Solar-Wind Power On-grid System Using HOMER Pro®: A Case Study in Colombia
(BarranquillaSede Norte, 2020-04-02)The electrical sector in the Caribbean region of Colombia is currently facing problems that a ect its reliability. Many thermo-electric plants are required to fill the gap and ensure energy supply. This paper thus proposes ...
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Enhanced Tetracycline Removal from Highly Concentrated Aqueous Media by Lipid-Free Chlorella sp. Biomass
(BarranquillaIngeniería IndustrialSede Norte, 2022-04-14)Microalgae are used as a lipid source for different applications, such as cosmetics and biofuel. The nonliving biomass and the byproduct from the lipid extraction procedure can efficiently remove antibiotics. This work has ...
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Estrategias tecnológicas en bibliotecas universitarias como centros de recursos para la investigación y el aprendizaje en la región Caribe de Colombia
(BarranquillaAdministración de EmpresasSede Norte, 2020-12-01)La presente investigación estuvo dirigida a caracterizar las estrategias tecnológicas utilizadas en bibliotecas universitarias como centros de recursos para la investigación y el aprendizaje en la región Caribe Colombiana. La ...
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Estudios sobre educación intercultural en Colombia: tendencias y perspectivas
(BarranquillaSede Norte, 2009-07-10)En este artículo la autora da cuanta de las tendencias y perspectivas de los estudios sobre educación intercultural que se han realizado en el país en los últimos años. Para lo cual hace un recorrido por los diversas ...
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Evaluation of Photovoltaic Energy Projects using the Real Options Valuation
(BarranquillaSede Norte, 2020-08-30)The purpose of the article is to analyze from a current perspective how Real Options Valuation facilitate the evaluation of projects for the adoption of photovoltaic energy in countries such as Colombia. A mixed descriptive ...
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Evaluation of the Corrosion Resistance of AISI 316l Steel Subjected to Severe Deformation Using the Groove Pressing Technique
(BarranquillaSede Norte, 2019-11-25)In this investigation, samples of AISI 316L steel were subjected to severe plastic deformation by the groove pressing (GP) technique using 2 dies A2 type tool steel dies with dimensions of 96 mm X 96 mm, a corrugated die ...
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Evaluation of the energy recovery potential of thermoelectric generators in diesel engines
(BarranquillaIngeniería MecánicaSede Norte, 2019-09-12)Thermoelectric generation is an alternative to recover some of the wasted energy trough an exhaust of the internal combustion engines. This paper assesses the performance of a thermoelectric generator with 20 modules by ...
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Evaluation of the Zinc Sulfate Catalytic Effect in Empty Fruit Bunches Pyrolysis
(BarranquillaIngeniería MecánicaSede Norte, 2022-09-02)The effect of zinc sulfate as a catalyst on the pyrolysis of empty fruit bunches (EFB) from oil palm was assessed. Thus, a thermo-gravimetric analyzer coupled with a Fourier transform infrared spectroscopy (TG-FTIR) was ...
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Exergetic analysis of a dual-fuel engine, PEM electrolyzer and thermoelectric generator integrated system
(BarranquillaIngeniería MecánicaSede Norte, 2020-08-12)In this research, the implementation of an integrated system composed of a dual-fuel engine (Diesel-Hydrogen), a PEM electrolyzer and a thermoelectric generator is envisioned. In order to know the optimal operating ...
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Exergy, Economic, and Life-Cycle Assessment of ORC System for Waste Heat Recovery in a Natural Gas Internal Combustion Engine
(BarranquillaIngeniería MecánicaSede Norte, 2020-01-01)In this article, an organicRankine cycle (ORC)was integrated into a 2-MWnatural gas engine to evaluate the possibility of generating electricity by recovering the engine’s exhaust heat. The operational anddesignvariableswiththe ...
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Experimental assessment of emissions maps of a single-cylinder compression ignition engine powered by diesel and palm oil biodiesel-diesel fuel blends
(BarranquillaIngeniería MecánicaSede Norte, 2020-02-26)Diesel engines applications cover a broad spectrum, ranging from vehicles that transport passengers and move goods to specialized vehicles and equipment used in the construction and agriculture industries. However, diesel ...