Investigaciones: Envíos recientes
Mostrando ítems 661-680 de 1465
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Minimization of the distribution operating costs with D-STATCOMS: A mixed-integer conic model
(Cartagena de Indias, 2022-07-22)This paper addresses the problem of determining the optimal location and operation of distribution static synchronous compensators (D-STATCOMs) in power distribution networks. Metaheuristic algorithms have been conventionally ... -
Youth unemployment during economic shocks: Evidence from the metal-mining prices super cycle in Chile
(Cartagena de Indias, 2022-08-19)We analyze the effect of an exogenous commodity shock on youth long-run unemployment, and the causal mechanisms that underlie this relationship. We use Chile as a study case and the Metal Mining Price Super Cycle between ... -
Application of the Crow Search Algorithm to the Problem of the Parametric Estimation in Transformers Considering Voltage and Current Measures
(Cartagena de Indias, 2022-06-06)The problem of the electrical characterization of single-phase transformers is addressed in this research through the application of the crow search algorithm (CSA). A nonlinear programming model to determine the series ... -
La Comisión de la Verdad en Colombia: conocimiento, percepción, eficacia y emociones asociadas
(Cartagena de Indias, 2021-10-22)La Comisión de la Verdad en Colombia se estableció a partir del modelo de justicia transicional. Su función es servir como medida de reconocimiento de los hechos violentos durante el conflicto armado, que han dejado más ... -
Crack Formation in Chill Block Melt Spinning Solidification Process: A Comparative Analysis Using OpenFOAM
(Cartagena de Indias, 2022-01-12)The application of FeSiB family magnetic materials in the electrical or electronic industry has significantly increased owing to the development of amorphous and nanocrystalline metallic glasses using melt spinning and ... -
An IDA-PBC Design with Integral Action for Output Voltage Regulation in an Interleaved Boost Converter for DC Microgrid Applications
(Cartagena de Indias, 2021-12-29)This paper describes the output voltage regulation control for an interleaved connected to a direct current (DC) microgrid considering bidirectional current flows. The proposed controller is based on an interconnection ... -
Use of the rice and corn husk ashes as an innovative pozzolanic material in ceramic tile adhesive production
(Cartagena de Indias, 2021-11-01)In this study, the use of agro-industrial waste from rice and corn husk ashes as a pozzolanic addition for cement substitution in the manufacture of ceramic tile adhesive is presented. The cement replacement, at 15%, 20%, ... -
Sex Role Ideology of Students in a Colombian Engineering Faculty
(Cartagena de Indias, 2022-02-21)This paper examined the perceptions of students from different engineering programs at a private university in Cartagena de Indias (N = 243) with the aim of clearly identifying the profile of an engineer in training with ... -
Justificación y actitudes del estudiantado frente a la violencia en universidades colombianas
(Cartagena de Indias, 2021-10-20)La evidencia empírica sobre la violencia en universidades se ha enfocado comúnmente en identificar conductas de agresión o acoso (bullying) entre estudiantes y en analizarlas en función del género y de variables psicosociales. ... -
Medios noticiosos y audiencias : una exploración al consumo y a la credibilidad y confianza en estos durante la cuarentena por covid-19 en Colombia
(Cartagena de Indias, 2021-08-15)Durante la cuarentena decretada por la pandemia de covid-19 en Colombia, se realizó una investigación exploratoria acerca de hábitos de consumo de medios noticiosos donde se abordó también la percepción de credibilidad ... -
Convergence analysis of the triangular-based power flow method for AC distribution grids
(Cartagena de Indias, 2021-06-30)This paper addresses the convergence analysis of the triangular-based power flow (PF) method in alternating current radial distribution networks. The PF formulation is made via upper-triangular matrices, which enables ... -
Parametric estimation in photovoltaic modules using the crow search algorithm
(Cartagena de Indias, 2021-06-16)The problem of parametric estimation in photovoltaic (PV) modules considering manufacturer information is addressed in this research from the perspective of combinatorial optimization. With the data sheet provided by the ... -
Optimal Design of PV Systems in Electrical Distribution Networks by Minimizing the Annual Equivalent Operative Costs through the Discrete-Continuous Vortex Search Algorithm
(Cartagena de Indias, 2022-01-23): This paper discusses the minimization of the total annual operative cost for a planning period of 20 years composed by the annualized costs of the energy purchasing at the substation bus summed with the annualized ... -
Optimal Integration of Dispersed Generation in Medium-Voltage Distribution Networks for Voltage Stability Enhancement
(Cartagena de Indias, 2022-01-25): This study addresses the problem of the maximization of the voltage stability index (λcoefficient) in medium-voltage distribution networks considering the optimal placement and sizing of dispersed generators. The problem ... -
Hierarchical Control for DC Microgrids Using an Exact Feedback Controller with Integral Action
(Cartagena de Indias, 2022-02-06)This paper addresses the problem of the optimal stabilization of DC microgrids using a hierarchical control design. A recursive optimal power flow formulation is proposed in the tertiary stage that ensures the global ... -
Development and Characterization of Plantain (Musa paradisiaca) Flour-Based Biopolymer Films Reinforced with Plantain Fibers
(Cartagena de Indias, 2022-02-15)Agroindustrial wastes are a cheap and abundant source of natural fibers and acromolecules that can be used in the manufacturing of biocomposites. This study presents the development and thermo-mechanical characterization ... -
Trade-Off Asymmetric Profile for Extended-Depth-of-Focus Ocular Lens
(Cartagena de Indias, 2022-02-19)We explore the possibility of extending the depth of focus of an imaging lens with an asymmetric quartic phase-mask, while keeping the aberration within a relatively low level. This can be intended, for instance, for ... -
On the Conic Convex Approximation to Locate and Size Fixed-Step Capacitor Banks in Distribution Networks
(Cartagena de Indias, 2022-02-20)The problem of the optimal siting and sizing of fixed-step capacitor banks is studied in this research from the standpoint of convex optimization. This problem is formulated through a mixed-integer nonlinear programming ... -
Resultados de aprendizaje y mecanismos de evaluación en los programas académicos de educación superior en Colombia
(Cartagena de Indias, 2022-02-01)El propósito de este estudio es diseñar un sistema de resultados de aprendizaje y determinar su importancia en los programas de educación superior en Colombia. La investigación fue racional propositiva y se contrastan el ... -
A new radial basis integration method applied to the boundary element analysis of 2D scalar wave equations
(Cartagena de Indias, 2022-01-10)A new integration method named the Radial Basis Integration Method (RBIM) that include the Kriging Integration Method (KIM) Narváez and Useche (2020) as a particular case and performs boundary only offline precomputations ...
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.
