Investigaciones: Envíos recientes
Mostrando ítems 801-820 de 1465
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Hilo lector: introducción
(Cartagena de IndiasCampus TecnológicoComunicación Social, 2020-01-28)Una serie de podcasts para estimular la lectura entre los estudiantes del programa de Comunicación Social y la Facultad de Ciencias sociales y Humanidades. Con nuestro Hilo se ha tejido una colección de lecturas de clásicos ... -
Three-dimensional multimodal medical imaging system based on freehand ultrasound and structured light
(Cartagena de Indias, 2021-05-21)We propose a three-dimensional (3D) multimodal medical imaging system that combines freehand ultrasound and structured light 3D reconstruction in a single coordinate system without requiring registration. To the best of ... -
Synthesis, characterization and catecholase biomimetic activity of novel cobalt(II), copper(II), and iron(II) complexes bearing phenylene-bisbenzimidazole ligand
(Cartagena de Indias, 2021-04-24)Transition metal complexes of Co(II), Cu(II), and Fe(II) bearing a rigid symmetrical 2,20 -(1,2-phenylene)bis (1H-benzimidazole) ligand, PhBIm2, were synthesized and fully characterized by ESI-MS, FT-IR, 1 H NMR (for ... -
Cultural damage and reparation of victims in the Colombian armed conflict. The case of the black peasant community of San Cristóbal (Montes de María – Colombia)
(Cartagena de Indias, 2021-05-16)The aim of this study is to identify and analyze the cultural damage caused by the armed conflict in the black peasant community of San Cristóbal, in Montes de María, one of the regions most affected by the prolonged ... -
Energy, economic, and environmental assessment of the integrated production of palm oil biodiesel and sugarcane ethanol
(Cartagena de Indias, 2021-05-26)The key objective of this study was to evaluate and compare, within the concept of integrated biorefining, the potential environmental gains of the life cycle, economic feasibility and energy balance of the production ... -
Method for large-scale structured-light system calibration
(Cartagena de Indias, 2021-05-24)We propose a multi-stage calibration method for increasing the overall accuracy of a large-scale structured light system by leveraging the conventional stereo calibration approach using a pinhole model. We first calibrate ... -
Methodology of classification, forecast and prediction of healthcare providers accredited in high quality in Colombia
(Cartagena de Indias, 2021-05-11)This research presents a methodology for classification, forecasting and prediction of healthcare providers accredited in Colombia. For this purpose, a quantitative, descriptive and predictive analysis was carried out of ... -
Origin and weight of news media outlets indexed on google news: An exploration of the editions from Brazil, Colombia, and Mexico
(Cartagena de Indias, 2020-12-01)Google News is a controversial news aggregation service owned by Google. By analyzing 3,738,375 news stories added in the Brazil, Colombia, and Mexico editions from January to March of 2015, 2,246 news media outlets were ... -
Study of early P91 dual corrosion in steam and simulated combustion gases from a gas-fired boile
(Cartagena de Indias, 2021-07-25)P91 ferritic steel pipes face dual environments during boilers operation: steam-side and fire-side. This P91 steel assessment differs from the dual studies performed to simulate coal-fired boilers -oxyfuel/steam atmospheres- ... -
Simultaneous Minimization of Energy Losses and Greenhouse Gas Emissions in AC Distribution Networks Using BESS
(Cartagena de IndiasCampus TecnológicoIngeniería Eléctrica, 2021-04-22)The problem of the optimal operation of battery energy storage systems (BESSs) in AC grids is addressed in this paper from the point of view of multi-objective optimization. A nonlinear programming (NLP) model is presented ... -
Production system in a collaborative supply chain considering deterioration
(Cartagena de Indias, 2021-06-24)This research presents a mathematical model for a collaborative planning of the supply chain involving four echelons (supplier, production plants, distribution, retails, or clients). The model seeks to maximize profit ... -
Advanced exergy and exergoeconomic analysis of a gas power system with steam Injection and air cooling with a compression refrigeration machine
(Cartagena de Indias, 2021-03-03)Gas turbine power plants have been widely studied, and as a result the negative effects on their output power and thermal efficiency have been known when operating in atmospheric conditions exceeding ISO conditions. For ... -
Assessing and classification of academic efficiency in engineering teaching programs
(Cartagena de Indias, 2021-03-31)This research uses a three-phase method to evaluate and forecast the academic efficiency of engineering programs. In the first phase, university profiles are created through cluster analysis. In the second phase, the ... -
Genetic-convex model for dynamic reactive power compensation in distribution networks using D-STATCOMs
(Cartagena de IndiasCampus TecnológicoIngeniería Eléctrica, 2021-04-21)This paper proposes a new hybrid master–slave optimization approach to address the problem of the optimal placement and sizing of distribution static compensators (D-STATCOMs) in electrical distribution grids. The optimal ... -
Substituted heterocycles as new candidates for liquid organic hydrogen carriers: In silico design from DFT calculations
(Cartagena de Indias, 2021-02-24)A new set of compounds based on N- and S-heterocycles were investigated through Density Functional Theory (DFT) for their use as liquid organic hydrogen carriers (LOHCs). The hydrogenated forms of these compounds could ... -
The equivalence between successive approximations and matricial load flow formulations
(Cartagena de IndiasCampus TecnológicoIngeniería Eléctrica, 2021-03-24)This paper shows the equivalence of the matricial form of the classical backward/forward load flow formulation for distribution networks with the recently developed successive approximations (SA) load flow approach. Both ... -
Application of the vortex search algorithm to the phase-balancing problem in distribution systems
(Cartagena de IndiasCampus TecnológicoIngeniería Eléctrica, 2021-02-26)This article discusses the problem of minimizing power loss in unbalanced distribution systems through phase-balancing. This problem is represented by a mixed-integer nonlinear-programming mathematical model, which is ... -
Mean Dimension and Metric Mean Dimension for Non-autonomous Dynamical Systems
(Cartagena de Indias, 2020-10-07)In this paper we extend the definitions of mean dimension and metric mean dimension for non-autonomous dynamical systems. We show some properties of this extension and furthermore some applications to the mean dimension ... -
Social representations of media reception during the COVID-19 lockdown in Colombia: from messages to meanings
(Cartagena de Indias, 2020-07-14)Las investigaciones recientes sobre la COVID-19 se han centrado en los efectos de esta pandemia en la salud pública, así como en los controles de bio seguridad y sus implicaciones socioeconómicas. El presente estudio ... -
Efficient operative cost reduction in distribution grids considering the optimal placement and sizing of d-statcoms using a discrete-continuous vsa
(Cartagena de IndiasCampus TecnológicoIngeniería Eléctrica, 2021-03-02)The problem of reactive power compensation in electric distribution networks is addressed in this research paper from the point of view of the combinatorial optimization using a new discrete-continuous version of the vortex ...
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.
