Examinando por Autor "Arango I."

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    How does information disclosure affect liquidity? Evidence from an emerging market
    (Elsevier Inc., 2019-01-01) Arango I.; Agudelo D.A.
    Cross-sectional models positively relate firm information disclosure with stock liquidity, but dynamic models on days of news releases show the opposite relation. We investigate this relationship by studying the effects of information disclosure on liquidity and its determinants. We use trade and quote data from Colombia for 2015 and 2016, along with a complete database of news releases as reported by firms to the regulator. The results of panel data and panel vector autoregressive (PVAR) models suggest that news releases increase both informed and uninformed trading. Overall, the negative effect of news releases on liquidity is temporary and fully explained by increasing asymmetric information. © 2019 Elsevier Inc.
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    Numerical design method for CVT supported in standard variable speed rubber V-belts
    (Universitatea Politehnica Bucuresti, 2020-01-01) Arango I.; Alzate S.M.; Universidad EAFIT. Departamento de Geología; Ciencias del Mar
    The design of a V-belt continuously variable transmission (CVT) system is a complex problem due to the multiple interactions between components during its operation. Literature on CVT system design methods is scarce, and the vast majority of works include implicit equations that hinder applications at a basic design level. This research aims to introduce a numerical CVT design method for electric vehicles (EV) and internal combustion engine (ICE) vehicles considering each one of their components and using mechanical centrifugal actuators and a rubber V-belt. This design method is based on user needs, for which there are three main requirements: road specifications, vehicle characteristics, and expected performance. This method is focused on a transmission for a vehicle traveling on the same route constantly, such as public transport vehicles. From three-wheelers to medium cargo vehicles, there is a greatly diverse range of potential applications for using this method for each type of standard rubber V-belt. © 2020 by the authors.
  • No hay miniatura disponible
    Ítem
    Numerical design method for CVT supported in standard variable speed rubber V-belts
    (Universitatea Politehnica Bucuresti, 2020-01-01) Arango I.; Alzate S.M.; Arango I.; Alzate S.M.; Universidad EAFIT. Departamento de Ingeniería Mecánica; Mecatrónica y Diseño de Máquinas
    The design of a V-belt continuously variable transmission (CVT) system is a complex problem due to the multiple interactions between components during its operation. Literature on CVT system design methods is scarce, and the vast majority of works include implicit equations that hinder applications at a basic design level. This research aims to introduce a numerical CVT design method for electric vehicles (EV) and internal combustion engine (ICE) vehicles considering each one of their components and using mechanical centrifugal actuators and a rubber V-belt. This design method is based on user needs, for which there are three main requirements: road specifications, vehicle characteristics, and expected performance. This method is focused on a transmission for a vehicle traveling on the same route constantly, such as public transport vehicles. From three-wheelers to medium cargo vehicles, there is a greatly diverse range of potential applications for using this method for each type of standard rubber V-belt. © 2020 by the authors.
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    Prediction of a flying droplet landing over a non-flat substrates for ink-jet applications
    (Springer-Verlag France, 2019-01-01) Arango I.; Bonil L.; Posada D.; Arcila J.; Arango I.; Bonil L.; Posada D.; Arcila J.; Universidad EAFIT. Departamento de Ingeniería Mecánica; Mecatrónica y Diseño de Máquinas
    Printing with inkjet technology has found new forms of application in the industry and in this article we study this technology focused on printing on non-flat surfaces. Since there is no print history over distances greater than 1 mm due to the rupture phenomenon, an initial quality standard is defined to measure achievements in a relative manner. An interactive method is used that requires the user to approach the machine in multiple analyzes of different types. The first approach is a mathematical model this model was constructed to predict the drop distance of the drop in the non-planar substrate with respect to the planned one in the flat substrate, taking into account that most of the drops fall to different heights presenting a greater or lesser state of development the phenomena present in the flight. The results allow to initiate a process of compensation that avoids the distortion of the figure to improve the printing resolution. The results are validated using a relative quality through industrial ink-jet printer with heads capable of injecting functional fluids. The initial result indicates that in standard surface printing with print relative quality already defined, it can be used only for low resolution formats with thick lines, and the result can be improved when the original figure is treated by compensating the distance between the numerical prediction and the initial objective. © 2019, Springer-Verlag France SAS, part of Springer Nature.