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Mostrando ítems 1037-1056 de 1394
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Perturbing the boundary conditions of the generator of a cosine family
(2012)Let A be a densely defined, closed linear operator (which we shall call maximal operator) with domain D(A) on a Banach space X and consider closed linear operators L:D(A)→∂X and Φ:D(A)→∂X (where ∂X is another Banach space ... -
Phakopsora pachyrhizi is the major pathogen associated with soybean rust in Colombia
(Cartagena de Indias, 2021-03-26)Soybean crops grown in the plains of eastern Colombia have been affected by the incidence of rust. This disease, still officially regarded as American soybean rust (caused by Phakopsora meibomiae) by the Colombian Department ... -
Phonetic Detection for Hate Speech Spreaders on Twitter
(Cartagena de Indias, 2021-09-24)Nowadays, hate messages have become the object of study on social media. Efficient and effective detection of hate profiles requires various scientific disciplines, such as computational linguistics and sociology. Here, ... -
Photovoltaic power predictor module based on historical production and weather conditions data
(Cartagena de IndiasIngeniería de Sistemas y Computación, 2022-11-22)In recent years the demand for electrical energy has increased significantly. Usually, the electrical grid covers this demand. However, this fuel energy is known for its significant carbon footprint. For that reason, ... -
Photovoltaic System for Microinverter Applications Based on a Non-Electrolytic-Capacitor Boost Converter and a Sliding-Mode Controller
(Cartagena de Indias, 2022-09-15)This paper presents a photovoltaic (PV) system designed to reduce the DC-link capacitance present in double-stage PV microinverters without increasing the capacitor interfacing the PV source. This solution is based on a ... -
Physical-aware pattern selection for stuck-at faults
(Institute of Electrical and Electronics Engineers Inc., 2017)The stuck-at faults are basic faults that fail the chips. Various defects in the circuit can develop into stuck-at faults. To detect more defects caused by stuck-at faults, some of the fault sites may need to be detected ... -
Physico-Chemical and structural interpretation of discrete derivative indices on N-tuples atoms
(MDPI AG, 2016)This report examines the interpretation of the Graph Derivative Indices (GDIs) from three different perspectives (i.e., in structural, steric and electronic terms). It is found that the individual vertex frequencies may ... -
PI-PBC Approach for Voltage Regulation in Cuk Converters with Adaptive Load Estimation
(Cartagena de Indias, 2020-11-25)This paper proposes a proportional-integral passivity-based controller (PI-PBC) for supporting voltage in linear loads integrated with Ćuk converters. An adaptive load estimator is also employed to avoid current measurements ... -
Pixel-wise rational model for a structured light system
(Cartagena de Indias, 2023-05-15)This Letter presents a novel structured light system model that effectively considers local lens distortion by pixel-wise rational functions. We leverage the stereo method for initial calibration and then estimate the ... -
Plan de acción para la creación de condiciones necesarias que den cumplimiento a los requerimientos del decreto 1072 de 2015 referente al sistema de gestión de seguridad y salud en el trabajo en la empresa HBL infraestructura integral S.A.S. De la ciudad de Cartagena
(2021)En el presente trabajo, basados en la ISO 45001 y abordando el marco legal regido en la república de Colombia, más específicamente en el Decreto 1072 de 2015, se crea un plan de acción que le permita a la empresa HBL ... -
Plan de mejora en el nivel de madurez organizacional en gerencia de proyectos para cinco pymes del sector de la metalmecánica en Cartagena /
(2020)Los diferentes modelos de madurez para gestión de proyectos, han sido ideados para grandes empresas y muy pocos estudios han centrado su interés en las características de las Pymes, el conocimiento de estos modelos por ... -
Plan estratégico hacia la innovación, caso : MLS Central de Servicios Veterinarios /
(2020)En un mundo tan competitivo e internacionalizado las empresas que prosperan son aquellas que están más dispuestas a innovar, la estrategia de innovación es el vínculo fundamental entre los esfuerzos de desarrollo de nuevos ... -
Plastics and microplastics, effects on marine coastal areas: a review
(Cartagena de Indias, 2020-08-11)Plastics have become strong environmental stressors of coastal marine ecosystems. Their introduction into the marine ecosystem is subjected to different mechanisms, including the inadequate disposal of solid waste and ... -
Polarization study in Newtonian telescope components for depolarization parameter correction in atmospheric LiDAR
(Cartagena de Indias, 2023-06-12)In the present work, an experimental system is implemented, and a theoretical model is built that allows quanti fying atmospheric depolarization in the city of Santiago de Cali, Colombia. The experimental setup uses a ... -
Politicidio de baja intensidad: exterminio territorializado del Partido Revolucionario de los Trabajadores (PRT) en el Caribe colombiano, 1991-2005
(Cartagena de Indias, 2021-12-18)El siguiente artículo analiza el politicidio del Partido Revolucionario de los Trabajadores (PRT) ocurrido luego de la firma del acuerdo de paz entre esta guerrilla y el Gobierno colombiano en 1991. Se muestra cómo los ... -
Polylactic acid effectively reinforced with reduced graphitic oxide
(Cartagena de Indias, 2022-09-01)The present study was developed to reinforce a thermoplastic matrix with carbonaceous material to improve its thermal and mechanical properties. Composite materials formed from the homogenization of polylactic acid (PLA) ... -
Positioning and status of the Spanish numismatic journals in scientific databases
(Cartagena de Indias, 2019)The following article captures the current situation of the Spanish scientific journals focused on numismatics and their positioning in the main international bibliographical (Latindex, Web of Science and Scopus) and Spanish ... -
Potential dividends and actual cash flows in equity valuation. A critical analysis
(Cartagena de Indias, 2009-11-11)Practitioners and most academics in valuation include changes in liquid assets (potential dividends) in the cash flows. This widespread and wrong practice is inconsistent with basic finance theory. We present economic, ... -
Potential dividends and actual cash flows.A regional Latin American analysis
(Cartagena de Indias, 2009-11-26)We examine the value market assigns to components of the cash flow to equity including potential dividends. We study non financial publicly traded firms from five Latin American countries. The model includes four variables: ... -
Power Flow Analysis in DC Grids: Two Alternative Numerical Methods
(Institute of Electrical and Electronics Engineers Inc., 2019)This express brief proposes two new iterative approaches for solving the power flow problem in direct current networks as efficient alternatives to the classical Gauss-Seidel and Newton-Raphson methods. The first approach ...
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.