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Evaluation of irreversibility in an ammonia-water absorption refrigeration system using three different mathematical models to calculate the thermodynamic properties

Abstract: Second Law or Exergy Analyses of Absorption Refrigeration Systems (ARS) are very important for optimizations based on available work; these analyses are derived from the operating conditions and property calculations. There are several methods available for c

en es pt

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Application of business intelligence For analyzing vulnerabilities to increase the security level in an academic CSIRT

Abstract: This study aimed at designing a potential solution through Business Intelligence for acquiring data and information from a wide variety of sources and utilizing them in the decision-making of the vulnerability analysis of an Academic CSIRT (Computer Security

en es pt

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Thermal transfer analysis of tubes with extended surface with fractal design

Abstract: Heat exchangers are formed by tubes with extended surfaces that improve the transfer of heat between two media (e.g., a solid and a liquid in motion). This paper presents the design of an extended surface tube with fractal geometry, corresponding to the Koch

en es pt

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Rational efficiency in agro-industrial process with cold chain: Thermodynamic and exergoeconomic measurement

Abstract: The cold chain is the succession of links such as pre-cooling, refrigeration, freezing, and refrigerated transport. The physical variables of the heat transfer process are temperature control, relative humidity, dew point, and cooling surface. This paper aims

en es pt

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Simulation of o biogas cleaning process using different amines

Abstract: The use of biogas generated in landfills has gained importance in developing countries like Colombia. Taking into account that this biogas presents poor combustion properties that make interchangeability with other combustible gases difficult, the elimination

en es pt

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Analysis of precipitation and recharge of aquifers in Tota and Ibagué (Colombia) from stable isotopes (18O and 2H)

Abstract: Identifying the hydraulic connection between the area of recharge and the area of discharge in aquifers is only possible by using tracers; the 18O and 2H isotopes have proven to be good tracers to determine such hydraulic connection. It is assumed that in Iba

en es pt

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Evaluation of the WPA2-PSK wireless network security protocol using the Linset and Aircrack-ng tools

Abstract: Due to the emergence of new techniques and technologies of intrusion, the wireless network protocols have become obsolete; for this reason, this research seeks to violate and evaluate the security of the WPA2 protocol that is widely used by the Colombian serv

en es pt

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Enterprise file synchronization and sharing services for educational environments in case of disaster

Abstract: Cloud computing is an emerging solution that responds to the concept of Smart University; it aims at offering an intelligent environment of business continuity for the actors of an educational center. This research offers a recovery plan of educational servic

en es pt

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Smart Campus: Trends in cybersecurity and future development

Abstract: Smart Campus is an entity of any kind that uses technology and infrastructure to support and improve its processes, so people can use them better. This paper reviews the literature to contextualize the Internet of Things and its vital importance for the Smart

en es pt

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Effect of heat treatment on the tribological properties of Nickel-Boron electroless coating

Abstract: Nickel-Boron autocatalytic coatings are widely used in several industries to improve mechanical properties of materials such as hardness and wear resistance. Tribological properties were evaluated in Ni-B autocatalytic coatings deposited on AISI/SAE 1018 carb

en es pt

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Effect of cutting parameters on surface roughness in turning of annealed AISI-1020 steel

Abstract: This study focuses on the effects of cutting parameters such as cutting speed (Vc), feed rate (f), and depth of cut (d) on roughness induced on the surface of annealed AISI 1020 steel when machined by turning using carbide insert tools. The results indicated

en es pt

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Desing of wind propellers for horizontal axis

Abstract: The GEOM research seedbed of the Universidad Distrital Francisco José de Caldas is developing low and medium power wind turbines, and here we present an advance. Wind energy is a very important source of renewable energy and an excellent alternative for the t

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