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A review to refrigeration with thermoelectric energy based on the Peltier effect

Abstract: Currently, energy demand and environmental pollution have boosted the evolution of different environment friendly technologies for the development of clean and renewable energies. That is why scientific research allows us to demonstrate the use of solid state

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Mathematical modeling of the load correction coefficient of the lateritic of hydromixtures pumping

Abstract: The purpose of the present research was to determine the correction coefficient behavior of the characteristics of the centrifugal pump load curves, using mathematical models, taking into account the rheological properties. From experimental studies such as X

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Numerical comparisons of sandwich viscoelastic beam models

Abstract: Composite structures with elastic layers and viscoelastic core have been used as a passive damping treatment applied to reduce vibration amplitudes. In the design phase of this type of damping technique, many aspects ranging from computer modeling to laborato

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Continuous Estimation of Speed and Torque of Induction Motors Using the Unscented Kalman Filter under Voltage Sag
Amin Darvishi Aref Doroudi

Abstract: Due to sensor limitations in some applications, induction motors state estimators are widely used in industries. One of the most powerful tools available for estimation is the Kalman filter. In this paper, unscented Kalman filter (UKF) and extended Kalman fil

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Development of an easy-to-assemble external fixation system for bone transport

Abstract: We developed a monolateral external fixation system for bone lengthening that is easier to assemble than commercial systems. In this system, the clamps can be laterally assembled to the rail in contrast to the commercial systems in which the clamps can only b

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Predictive model of microorganism mesophiles in processed meat products during storage under fluctuating temperatures

Abstract: The aim of this investigation was to develop a predictive model of microorganism mesophiles in processed meat products during storage under fluctuating temperatures between 1°C to 7°C to establish the shelf removal date of the products based on mesophiles lim

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Voltage stability assessment using fast non-dominated sorting algorithm

Abstract: This paper presents a method to calculate multiple voltage stability limits (VSLs), voltage stability margins (VSMs), and voltage stability curves (VSCs). A multiobjective metaheuristic algorithm was used to change real and reactive powers of loads and genera

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Bioclimatic modeling for determining the minimum area of natural ventilation in buildings for the wet processing of coffee

Abstract: This study aimed to find the minimum area of natural ventilation suitable for coffee processing wet facilities in Colombia that have mechanical drying inside, in order to preserve the quality of coffee through a bioclimatic environment conducive to biological

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Evaluation of polyhydroxyalkanoate (PHAs) production with a bacterial isolate using cassava flour hydrolysates as an alternative substrate

Abstract: In the production of polyhydroxyalkanoates (PHAs), the costs of the process are mainly associated with the carbon source and most production studies are carried out with commercial strains. In this study, PHAs production was evaluated using SB-34, a wild-type

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Argumentation-based intention formation process

Abstract: In this work, we present an argumentation-based formalization for supporting the process of formation of intentions in practical agents. This is based on the belief-based goal processing model proposed by Castelfranchi and Paglieri, which is a more expressive

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Optimal joint RAN selection and resource allocation strategy in HetNet under Co-channel and user centric deployment

Abstract: In this article, a joint Radio Access Network selection strategy and a sub-channel resource allocation scheme are introduced, in which the downlink of a two-tier HetNet system is deployed in a co-channel deployment. With this scenario in mind, a Semi Markovia

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Hybrid model to design a distribution network in contract farming

Abstract: This paper suggests a hybrid model to solve a distribution problem incorporating the impact of uncertainty in the solution. The model combines the deterministic approach and the simulation including stochastic variables such as harvest yield, loss risk and pe

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Towards the reduction of the effects of muscle fatigue on myoelectric control of upper limb prostheses

Resumen: Este artículo presenta una investigación centrada en el impacto de la fatiga muscular en un esquema de reconocimiento de patrones para el control mioeléctrico que utiliza tres conjuntos de características y un clasificador de análisis discriminante lineal. Lo

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Influence of the formulation on the thermophysical properties and the quality parameters of dairy ice cream

Abstract: Thermophysical properties and the quality parameters of vanilla dairy ice cream were evaluated as a function of formulation. The sucrose were substituted for alternative sweeteners, and whey powder was used to adjust the nonfat solid content. A mixture design

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Mechanism of glycerol dehydration and dehydrogenation: an experimental and computational correlation

Abstract: Experimental formation of hydroxyacetone (HA) from glycerol over La2CuO4 catalyst under mild experimental conditions (533 K, N2 atmosphere) was correlated with molecular modeling results with the aim to propose reaction pathways. Based on these results, a nov

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Some physical characteristics of the O/W macroemulsion of oleoresin of astaxanthin obtained from biomass of Haematococcus pluvialis

Abstract: Macroemulsions facilitate the solubilization, stability, bioaccessibility, and bioactivity of compounds with low solubility, as is the case of the emulsion developed from astaxanthin oleoresin (10%). In this study, some characteristics of the physical behavio

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Landslide risk assessment in slopes and hillsides. Methodology and application in a real case

Abstract: This document describes technical concepts and terms related to landslide risk on slopes and hillsides, from a comprehensive approach. A general methodology is presented for the risk analysis and assessment according to the threat, given by the interrelation

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Implementation of the ultrasonic through-transmission technique for the elastic characterization of fiber-reinforced laminated composite

Abstract: Laminated composites are widely used in applications when a high strength-to-weight ratio is required. Aeronautic, naval and automotive industries use these materials to reduce the weight of the vehicles and, consequently, fuel consumption. However, the fiber

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Cassava starches modified by enzymatic biocatalysis: effect of reaction time and drying method

Resumen: Actualmente surge la necesidad desarrollar y producir almidones modificados que permitan potenciar su aplicabilidad como aditivos en la industria alimentaria. En este se evaluó el efecto del tiempo de biocatálisis y tipo de secado (convección forzada y secado

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Evaluating gelling-agent mixtures as potential substitutes for bacteriological agar: an approach by mixture design

Abstract: Gelling agents are components to solidify media cultures facilitating the isolation of microorganisms in pure cultures. Agar is the most used gelling agent in microbiological field because of properties like gelling temperature and a desirable texture (high f

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Free fatty acids in rice bran during its storage after a treatment by twin-screw extrusion to prevent possible rapid hydrolytic rancidity of lipids

Abstract: This research studied the prevention of hydrolytic rancidity during the storage of rice bran stabilized by an extrusion process. A double screw extruder was used, set at 130° C in the barrel and a rotational speed of the screws programmed at 200 RPM. The mois

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The effect of changes in vegetation cover on the hydrological response of the sub-basin Los Pozos

Abstract: In the current study the SWAT hydrological simulation model was implemented in the sub basin Los Pozos, located in the Aquitania municipality, department of Boyacá, Colombia, in order to quantify the effect caused by changes from plant cover in the hydrologic

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Evaluation of toxicity from leachate lagoons sediments, using the toxicity leaching procedure - TCLP and acute toxicity tests

Abstract: Landfills have been the most used alternative for final municipal solid wastes disposal, however, this system is the responsible of contamination problems associated with the generation of leachates, sediments and toxic gasses emissions. The sediments occur b

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Use of failure data and criticality analysis in a maintenance management tool for electric power distribution company

Abstract: Electric power distribution companies are facing a challenging moment in time. Privatizations, scarce resources, low investments, and harsh penalties owing to inadequate quality force these companies to seek greater efficiency and control of their processes.

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Consumer loyalty programs: impact of different modalities

Abstract: This study presents a new modality of loyalty program and compares it with traditional approaches. Two commonly used modalities of loyalty programs, namely, individual and coalition, are described here in terms of their main characteristics, advantages, restr

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Design and implementation of a low-cost device for measuring sap flow in woody species

Abstract: Transpiration is a key variable in water balance. Sap flow measurement methods allow to estimate transpiration at plant level, but scalable at the forest stand, river basin or ecosystem level. This requires recording data continuously, for which there are com

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Water consumption of the sunflower crop irrigatedwith saline water

Abstract: The objective was to evaluate the water consumption of sunflower cultivars irrigated with saline waters. The experimental design utilized was in randomized blocks of a 2 x 4 factorial arrangement. This was composed of two levels of electrical conductivity (EC

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Experimental studies on the mechanical behavior of Mayan archeological rocks

Abstract: Mayan buildings have been the subject of significant archaeological and architectural research; however, so far there have been no relevant references concerning structural or mechanical behavior. Ancient Mayan constructors used calcareous rocks to build temp

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Manufacturing and reliability of a fiber Bragg grating strain sensor designed for uniaxial compression test of rocks

Abstract: In this work we present an optical Fiber Bragg Grating (FBG) strain sensor appropriate for uniaxial compression test of rocks. The rocks are a complex aggregate of materials and may exhibit in some cases mineral grains of size bigger than the conventional ele

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Diffuse irrigation systems for the production of watermelon in the Sabanas subregion, Sucre - Colombia

Abstract: In the present study, the relationships between the application of a diffuse tool applied to irrigation systems in watermelon crops are explored, as well as modeling and simulation as a tool applied to the same crop. Both tools were worked through Matlab® sof

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Effect of photocatalytic pretreatment of potato starch for bioethanol production using Saccharomyces cerevisiae during simultaneous saccharification-fermentation (SSF)

Abstract: In this study, the effect of photocatalytic (PC) pretreatment of potato starch with TiO2 during the gelatinization (GE) stage of a simultaneous saccharification-fermentation (SSF) process for bioethanol production was evaluated. The maximum amounts of reducin

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Assessment of simultaneous incorporation of crumb rubber and asphaltite in asphalt binders

Abstract: Every day, roads are submitted to greater stresses. Thereby, additives have been incorporated to asphalt mixtures to enhance pavements performance. The purpose of this experimental study is to characterize for the first time, to date, the viscoelastic propert

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Initial study of Eucalyptus Wood Ash (EWA) as a mineral admixture in concrete

Abstract: This study evaluated the possibility of using in natura Eucalyptus Wood Ash (EWA) from aviary furnaces as a mineral admixture in concrete. The ash was 100 mesh-sieved and added to the mix in 5, 10, 15 and 20% of the cement bulk. Physical analysis unveiled tha

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Picking planning and quality control analysis using discrete simulation: case in a food industry

Abstract: In warehouse operations management, picking is one of the most expensive and time-consuming activities; its impact can be seen in the final product delivered to clients, affecting logistic Key Performance Indicators and level of service. On the other hand, ch

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A convex approximation for optimal DER scheduling on unbalanced power distribution networks

Abstract: The increase of solar photovoltaic penetration poses several challenges for distribution network operation, mainly because such high penetration might cause reliability problems like protection malfunctioning, accelerated decay of voltage regulators and volta

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Optimizing acceptability of mango jam enriched with pectin from cacao husk (Theobroma cacao L.)

Abstract: This experiment was conducted in order to optimize and quantify the acceptability of mango jam enriched with pectin extracted from husk of cacao grown in the department of Sucre, Colombia. The experiment was performed using a two-factor, completely randomized

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Estimación del balance hídrico de la región Pacífica Colombiana

Resumen: Mediante la ecuación de balance hídrico superficial se estima la escorrentía media anual en la zona continental del dominio geográfico de Centro América para el programa Coordinated Regional Climate Downscaling Experiment (CORDEX) y se validan los resultados

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Valorización y optimización del residuo de mampostería para la elaboración de concreto autocompactante

Resumen: El empleo de diferentes materiales cementicios suplementarios (MCS) en la elaboración de concretos autocompactantes (CACs) es una práctica cada vez más frecuente. En este artículo se presentan resultados de una investigación acerca de la utilización del resid

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Valor de ajuste del índice de fugas de agua en infraestructuras

Resumen: En la actualidad se estima que un 85% de la población tiene acceso a un servicio adecuado de agua potable; sin embargo, cerca de un 40% no es registrada o facturada, debido a pérdidas, fugas o tomas clandestinas, lo que constituye un problema en la gestión y

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Curvas Intensidad-Duración-Frecuencia no estacionarias para la cuenca del río Medellín

Resumen: Las curvas Intensidad-Duración-Frecuencia (IDF) actuales suponen que la precipitación no varía significativamente con el tiempo, subestimando así sus eventos extremos, lo que aumenta el riesgo de inundaciones y de daños en la infraestructura, es por esto que

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Cotas para el problema de asignación de vehículos

Resumen: El problema de asignación dinámica de vehículos consiste en asignar una flota de vehículos para atender la demanda prevista por transporte de carga entre terminales, durante un horizonte de tiempo finito y con múltiples periodos, cuyo objetivo es maximizar el

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Análisis exergoeconómico de un ciclo de refrigeración por compresión de vapor incluyendo el costo de imputación por la formación del residuo

Resumen: En este trabajo se realiza un análisis exergoeconómico a un sistema de refrigeración por compresión de vapor con R134a. Se plantea la estructura productiva y se obtienen los modelos matemáticos de los costos exergéticos y exergoeconómicos con y sin imputación

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Estudio teórico, numérico y experimental de la intercambiabilidad del gas natural en Antioquia

Resumen: Se determinaron los límites operativos de intercambiabilidad con gas natural proveniente de distintas fuentes, de tal manera que no se afecte las propiedades físicas de los equipos de combustión ya instalados y se garantice un flujo de combustible eficiente y

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Influencia del contenido de oxígeno atmosférico en el proceso de purgado con argón en la soldadura TIG de tubería de acero inoxidable AISI 304

Resumen: Se realizaron soldaduras TIG en tuberías de acero inoxidable AISI 304 purgadas con argón, con 999, 500, 200, 100, 50, 25 y 10 ppm de oxígeno atmosférico en la cámara de purga para determinar si esto influye en la calidad superficial de la zona afectada por el

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El uranio como recurso energético y su actualidad minera en Colombia

Resumen: Se realiza un estudio del uranio como recurso energético y un comparativo con otros combustibles y biomasa, se analiza el costo / beneficio de la energía nuclear y los accidentes producidos por los diferentes tipos de energía. Se muestra el aprovechamiento de

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Criterios de Evaluación
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Criterios Altamente Valorados / Criterios Deseables Criterios Cualitativos
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