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Mostrando ítems 775-794 de 1373
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Light-induced control of the spin distribution on Cu–dithiolene complexes: A correlated ab initio study
(MDPI AG, 2019)Metal dithiolene complexes—M(dmit)2—are key building blocks for magnetic, conducting, and optical molecular materials, with singular electronic structures resulting from the mixing of the metal and dmit ligand orbitals. ... -
Lineamientos de estimación de costos para proyectos privados arquitectónicos, con base en un modelo de clasificación único
(Cartagena de Indias, 2020)El presente trabajo de investigación muestra una propuesta de pautas de estimación de costos para proyectos arquitectónicos privados en Colombia. Basado en la teoría de que un modelo de clasificación permite desarrollos ... -
Linear model to estimate the degradation index on the processing of recycled polypropylene due to the addition of stabilizer
(Universidad de Tarapaca, 2016)In the present research work, a lineal model to estimate the Processing Degradation Index (PDI) of polypropylene from recycled industrial waste and municipal solid waste is presented. According to the previous thing an ... -
Linear power flow formulation for low-voltage DC power grids
(Elsevier Ltd, 2018)This paper presents a reformulation of the power flow problem in low-voltage dc (LVDC) power grids via Taylor's series expansion. The solution of the original nonlinear quadratic model is achieved with this proposed ... -
Linear-based Newton-Raphson Approximation for Power Flow Solution in DC Power Grids
(Cartagena de Indias, 2018)This paper presents a linear-based Newton method for load flow solution in DC power grids. This approximation is based on the classical Taylor's series expansion combined to the open-circuit voltage obtained when all the ... -
Linking cosmic ray intensities to cutoff rigidity through multifractal detrented fluctuation analysis
(Cartagena de Indias, 2022)We use multifractal detrented fluctuation analysis (MFDFA) to investigate the relationship between magnetic rigidity or ”cutoff rigidity” and the variability and multifractal behavior in the time series of the cosmic ray ... -
Linking PM10 and PM2.5 Pollution Concentration through Tree Coverage in Urban Areas
(Cartagena de Indias, 2023-03-16)Particulate matter, PM10 and PM2.5, represents common air pollutants in cities and constitute a considerable threat to public health impacting daily activity of people living in city. In large cities, the main sources of ... -
Local stable and unstable manifolds for anosov families
(Cartagena de Indias, 2019)Anosov families were introduced by A. Fisher and P. Arnoux motivated by generalizing the notion of Anosov diffeomorphism defined on a compact Riemannian manifold. They are time-dependent dynamical systems with hyperbolic ... -
Location of FACTS Devices in Power Systems: Application to the IEEE 9 bus System
(Institute of Electrical and Electronics Engineers Inc., 2019)This paper proposes a methodology to find the location of a flexible transmission system in AC in a power system, based on a nodal order and the analysis of repetitive power flows. To check the proposed methodology, the ... -
Logistic regression models for predicting daily airborne Alternaria and Cladosporium concentration levels in Catalonia (NE Spain)
(Springer New York LLC, 2019)Alternaria and Cladosporium are the most common airborne fungal spores responsible for health problems, as well as for crop pathologies. The study of their behavior in the air is a necessary step for establishing control ... -
Logística inversa y sustentabilidad: un análisis bibliométrico /
(2020)La logística inversa y la sustentabilidad se ha convertido en una oportunidad para las empresas para mejorar la visibilidad, la rentabilidad y reducir costos de las cadenas de suministros. Estas se encargan de gestionar ... -
Loneliness and vertical and horizontal collectivism and individualism: A multinational study
(Cartagena de Indias, 2023)This paper investigates how horizontal and vertical individualism and collectivism predict self-report loneliness in addition to the variance accounted for by age and sex in 28 countries (N = 8,345). Horizontal and vertical ... -
Long-Term Effects of Degradation on Photovoltaic System Return on Investment
(Cartagena de IndiasCampus TecnológicoMaestría en Ingeniería, 2023-11-24)The adoption of photovoltaic (PV) systems has increased significantly in recent years, driven by the demand for off-grid and on-grid residential and commercial applications. However, the high initial investment required ... -
LoRAWAN network coverage testing design using open-source low-cost hardware
(Cartagena de Indias, 2020-12-01)The Internet of Things (IoT) is considered to be one of the most radical technological advances of the century. The increasing amount of applications and devices, requires the deployment of a large network infrastructure ... -
Los imaginarios de la esquina, experiencia simbólica para una ciudad activa, humana y sostenible en el Caribe colombiano /
(2020)Este trabajo identifica los aspectos simbólicos que contribuyen a generar capacidades des de las experiencias artísticas realizadas en las esquinas del Barrio Abajo de Barranquilla entre 2006 y 2019 por parte de la Fundación ... -
Low-intensity Politicide: Territorialized Extermination of the Partido Revolucionario de los Trabajadores (PRT) in the Colombian Caribbean, 1991-2005
(Cartagena de Indias, 2022)Objective/Context: The following article analyzes the politicide of the Partido Revolucionario de los Trabajadores (PRT) after signing the peace agreement between this guerrilla group and the Colombian government in 1991. ... -
LQR-Based adaptive virtual inertia for grid integration of wind energy conversion system based on synchronverter model
(Cartagena de Indias, 2021-03-06)This paper proposes adaptive virtual inertia for the synchronverter model implemented in a wind turbine generator system integrated into the grid through a back-to-back converter. A linear dynamic system is developed for ... -
LRemoving Dust Artifacts in Retinal Images via Dictionary Learning and Sparse-Based Inpainting
(Institute of Electrical and Electronics Engineers Inc., 2019)In the field of ophthalmology, retinal images are essential for the diagnosis of many diseases. These images are acquired with a device called the retinal camera. However, often small dust particles in the sensor produce ... -
Machine learning models for early dengue severity prediction
(Springer Verlag, 2016)Infection by dengue-virus is prevalent and a public health issue in tropical countries worldwide. Also, in developing nations, child populations remain at risk of adverse events following an infection by dengue virus, as ... -
Main difficulties of novel university students when preparing a scientific text
(Cartagena de Indias, 2020)The present research-action work is a descriptive mixed analysis of the micro-writing, macro-writing, methodological and writing in a public presentation errors committed by 46 novel psychology students when they making a ...
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.