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Esterification of rosin with methyl alcohol for fuel applications

Abstract: Oleoresin is obtained via tapping of pine trees and as a by-product of Kraft process in the pulp industry. Because of its low production cost, it is an attractive source for biofuels. Oleoresin is composed mainly of rosin (around 80%, a solid mixture of isome

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Effect of burner angle on the heat transfer of a frit furnace

Abstract: In this work, a numerical analysis was performed about the effect of a flat-flame burner incidence degree on the heat transfer of an industrial scale frit melting furnace, which uses a flat-flame natural gas oxy-combustion burner. The thermal performance of t

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A comparative surface analysis of explanted hip joint prostheses made of different biomedical alloys

Abstract: The introduction of modular design in total hip arthroplasty has enabled the use of different materials in one single configuration and the adjustment of the prosthesis to the patient’s body, and facilitated medical revisions. However, modularity leads to the

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An architecture for power substations communication networks based on SDN and virtualization paradigms
Alexánder Leal Juan Felipe Botero

Abstract: The deployment of infrastructures related to the Smart Grid concept introduces data communication networks in the grid operation systems (control, communication, and monitoring). The implementation of data communication networks facilitates and improves the e

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Design of two-dimensional perovskite solar cells with superior efficiency and stability
Daniel Ramírez Franklin Jaramillo

Abstract: Pervskite solar cells have attracted extensive attention from researchers worldwide due to their rapid development and efficiency. Nevertheless, stability is still an issue that limits the advance of this technology. In this work, we present the fabrication a

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Colombian climatology in CMIP5/CMIP6 models: Persistent biases and improvements

Abstract: Northern South America is among the regions with the highest vulnerability to climate change. General Circulation Models (GCMs) are among the different tools considered to analyze the impacts of climate change. In particular, GCMs have been proved to provide

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Planning and performance measurement in higher education: three case studies of operational research application

Abstract: In this work, we illustrate the application of a wide variety of Operations/operational research (OR) tools in higher education through three case studies based on practical applications conducted in the Engineering School of the Universidad de Antioquia. The

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Localised corrosion of super duplex stainless steel in synthetic NaOH-Na2S solution at different temperatures

Abstract: The pitting corrosion resistance of the UNS S-32760 super duplex stainless steel (SDSS) in synthetic NaOH-Na2S solution at different working temperatures of 25, 50, and 70°C has been evaluated in the current investigation to assess the alloy behaviour under t

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Finite element analysis of the flexor digitorum profundus tendon during a passive rehabilitation protocol

Abstract: The present study aims to create a patient-specific hand model to simulate the passive rehabilitation on the index finger, quantifying the flexor digitorum profundus (FDP) tendon excursion and the stress experienced during simulated flexion. The computational

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Performance and determination of Concentration Ratio for a parabolic solar concentrator using a thermographic technique

Abstract: This work addresses the methodology to determine the exact concentration ratio (CR) for a parabolic solar concentrator (PSC) using thermographic imaging. The value of CR is commonly given in terms of the area of the receiver and not in terms of the area of th

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