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Infection parameters of Heterorhabditis amazonensis (Nematoda: Heterorhabditidae) in different stages of Hibiscus pink mealybug
(2020)
The pink hibiscus mealybug Maconellicoccus hirsutus (Hemiptera: Pseudococcidae) is an invasive pest of an enormous variety of crops and has become a concern in many parts of the world. Early attempts to control M. hirsutus ...
Instrument for selecting and evaluating suppliers in small and medium-sized metalworking enterprises in Cartagena, Colombia
(2020)
The objective of this investigation is the definition of a practical tool that helps to improve the selection process and evaluation of suppliers in small and medium-sized metalworking enterprises in Cartagena city. For ...
Learning styles for algebra concepts: The case of engineering students at the Universidad de Santander (Valledupar, Colombia)
(2019)
The objective of this research was to evaluate the learning styles for algebra concepts of the students of the industrial engineering program of the University of Santander, Valledupar, Cesar, Colombia. A descriptive study ...
Hybrid calibration procedure for fringe projection profilometry based on stereo vision and polynomial fitting
(2020-03-19)
The key to accurate 3D shape measurement in fringe projection profilometry (FPP) is the proper calibration of the measurement system. Current calibration techniques rely on phase-coordinate mapping (PCM) or back-projection ...
Mathematical modeling of a system composed of parabolic trough solar collectors integrated with a hydraulic energy storage system
(2020)
In this work we propose to model a 7.5 kWe power generation system, implementing a Parabolic Trough Collector system, coupled to an Organic Rankine Cycle (PTC/ORC) and a bladder-type hydraulic accumulator system. The purpose ...
Principales dificultades del alumnado universitario novel a la hora de elaborar un texto científico
(2020-05-14)
El presente trabajo de investigación-acción es un análisis mixto de corte descriptivo de los errores de micro-redacción, macro-redacción, metodológicos y de escritura en una presentación pública cometidos por 46 estudiantes ...
Optimal selection and location of fixed-step capacitor banks in distribution networks using a discrete version of the vortex search algorithm
(2020-09-19)
This paper deals with the problem of the optimal selection of capacitor banks in electrical AC distribution systems for minimizing the costs of energy losses during a year of operation through a discrete version of the ...
Extension of the B3LYP-dispersion-correcting potential approach to the accurate treatment of both inter-and intra-molecular interactions
(2013)
We recently demonstrated that dispersion-correcting potentials (DCPs), which are atom-centered Gaussian-type functions that were developed for use with B3LYP (Torres and DiLabio in J Phys Chem Lett 3:1738-1744, 2012), ...
Modeling and control of a small hydro-power plant for a DC microgrid
(Elsevier Ltd, 2020)
This paper presents the modeling and control of a small hydro-power plant (SHP) for a DC microgrid based on passivity theory. The SHP is made up of a turbine, a permanent magnet synchronous generator (PMSG), a voltage ...
Women's perceived risk of sexual harassment in a Bus Rapid Transit (BRT) system: The case of Barranquilla, Colombia
(Elsevier Ltd, 2019)
Background: Sexual harassment in public transportation is a growing concern, particularly among women. Over the years, there have been several programs and policies to mitigate sexual harassment while using public transport. ...
Universidad Tecnológica de Bolívar - 2017 Institución de Educación Superior sujeta a inspección y vigilancia por el Ministerio de Educación Nacional. Resolución No 961 del 26 de octubre de 1970 a través de la cual la Gobernación de Bolívar otorga la Personería Jurídica a la Universidad Tecnológica de Bolívar.