Browsing Productos de investigación by Title
Now showing items 769-788 of 962
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Quality changes in fundus images of pseudophakic eyes
(Sociedad Espanola de Optica, 2018)We consider the changes produced in the quality of eye fundus images of patients before and after cataract surgery with intraocular lens implantation and propose a measure to quantitatively assess those changes. Several ... -
Quality differentiation with flavors: Demand estimation of unobserved attributes
(Walter de Gruyter GmbH, 2013)This article estimates the demand for mint-flavored gum products using grocery store sales data and accounting for consumers' valuation of quality. Unobserved product attributes, such as flavor quality, are important ... -
Quality Improvement in Ammonium Nitrate Production Using Six Sigma Methodology
(Cartagena de Indias, 2020)Six sigma has been used in different industries to reach operational excellence. However, in the chemical industry, the application of this methodology is limited. This research presents an implementation of the six sigma ... -
Quantum machine learning for intrusion detection of distributed denial of service attacks: a comparative overview
(Cartagena de Indias, 2021-03-01)In recent years, we have seen an increase in computer attacks through our communication networks worldwide, whether due to cybersecurity systems' vulnerability or their absence. This paper presents three quantum models to ... -
Quasi-static flow model for predicting the extreme values of air pocket pressure in draining and filling operations in single water installations
(Cartagena de Indias, 2020)Inertial models have been used by researchers to simulate the draining and filling processes in water pipelines, based on the evolution of the main hydraulic and thermodynamic variables. These models use complex differential ... -
QuBiLs-MAS method in early drug discovery and rational drug identification of antifungal agents
(Taylor and Francis Ltd., 2015)The QuBiLs-MAS approach is used for the in silico modelling of the antifungal activity of organic molecules. To this effect, non-stochastic (NS) and simple-stochastic (SS) atom-based quadratic indices are used to codify ... -
¿Qué es y hacia dónde va la fotografía?
(Cartagena de Indias, 2021-07-01) -
Rasch Analysis of the Q-CHAT in Colombian Toddlers with Autism Spectrum Disorder
(Springer New York LLC, 2019)The objective of this study was the validation of the Colombian version of The Quantitative Checklist for Autism in Toddlers (Q-CHAT) by means of the Rasch Rating Scale Model. The Q-CHAT was applied to parents of 100 ... -
Reactive scheduling in collaborative supply chain: A literature review
(Revista Espacios, 2017)This paper aims to review the literature on the reprogramming of production in collaborative supply chains, through a thorough investigation and Scientometric analysis to identify the behavior of publications in recent ... -
Reduction of annual operational costs in power systems through the optimal siting and sizing of STATCOMs
(Cartagena de Indias, 2021-04-17)The problem of the optimal siting and placement of static compensates (STATCOMs) in power systems is addressed in this paper from an exact mathematical optimization point of view. A mixed-integer nonlinear programming ... -
Reduction of blooming artifacts in cardiac CT images by blind deconvolution and anisotropic diffusion filtering
(SPIE, 2015)Even though CT is an imaging technique that offers high quality images, limitations on its spatial resolution cause blurring in small objects with high contrast. This phenomenon is known as blooming artifact and affects ... -
Reduction of losses and operating costs in distribution networks using a genetic algorithm and mathematical optimization
(Cartagena de IndiasCampus TecnológicoIngeniería Eléctrica, 2021-02-09)This study deals with the minimization of the operational and investment cost in the distribution and operation of the power flow considering the installation of fixed-step capacitor banks. This issue is represented by a ... -
Reflexiones y recomendaciones en torno a la experiencia del comité por la revitalización de las fiestas de la independencia de Cartagena de Indias /
(2020)En el presente estudio de abordaje etnográfico, cuyo diseño se circunscribe al análisis de condiciones para la participación, se describen e interpretan aquellos determinantes del contexto y de la dinámica interna del ... -
Reflexión para el fomento del emprendimiento de alto impacto en el ecosistema empresarial de la ciudad de Cartagena /
(2020)En gran medida se ha hablado de la importancia del desarrollo de emprendimientos para la dinámica económica y social de un país o una región en particular; es de suma importancia entender el porqué de la necesidad de crear ... -
Region growing segmentation of ultrasound images using gradients and local statistics
(SPIE, 2017)This paper describes a region growing segmentation algorithm for medical ultrasound images. The algorithm starts with anisotropic diffusion filtering to reduce speckle noise without blurring the edges. Then, region growing ... -
Relational Agreement Measures for Similarity Searching of Cheminformatic Data Sets
(Institute of Electrical and Electronics Engineers Inc., 2016)Research on similarity searching of cheminformatic data sets has been focused on similarity measures using fingerprints. However, nominal scales are the least informative of all metric scales, increasing the tied similarity ... -
Relaxed convex model for optimal location and sizing of DGs in DC grids using sequential quadratic programming and random hyperplane approaches
(Elsevier Ltd, 2020)This report addresses the problem of optimal location and sizing of constant power sources (distributed generators (DGs)) in direct current (DC) networks for improving network performance in terms of voltage profiles and ... -
La religión como estrategia de afrontamiento en los estudiantes universitarios : una revisión teórica
(Cartagena de Indias, 2022-05-01)Se presenta en este artículo científico un análisis de la documentación existente obtenida en Scopus (2012-2020) acerca de las estrategias de afrontamiento religioso que poseen los estudiantes universitarios y su utilidad. ... -
Removing Omissions and Inconsistencies from the ISA 5.1 Narratives of Industrial Processes
(Cartagena de Indias, 2020-12-25)This work is concerned with the modelling of industrial processes, described by Pipe and Instrumentation Diagrams (P&ID) and narratives as specified in the norm ISA 5.1, by Interpreted Petri Nets (IPN). In a previous work, ... -
Renewable energy production and demand dataset for the energy system of Colombia
(Elsevier Inc., 2020)During the last decades, an increasing number of studies have focused their attention on the development of energy system models in order to facilitate sustainable energy planning strategies and understand the technical ...
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.
