Buscador de Tesis y publicaciones académicas

Active Disturbance Rejection Control for Decentralized Operation of Microgrids: Theoretical Equivalence and Performance Comparison with Robust GPI

Daniel Vargas-Medina · John A. Cortes-Romero · Eduardo Mojica-Nava

Abstract The effective control of microgrids is essential for ensuring the stable and reliable operation of modern distribution systems, particularly with the increasing integration of renewable energy sources. The networked nature of these systems introduces new control challenges, especially in inverter-based microgr...

Chloroplastic and Nuclear Markers Reveal the Phylogeny of Passiflora Species from Boyacá, Colombia

Elsa Manjarres · Ana Morillo · Yacenia Morillo

Passiflora species are recognized for their intense evolutionary dynamics within the chloroplast genome (cp), serving as a primary model for studying structural variations in natural populations. This study investigates the phylogenetic relationships of 47 Passiflora accessions from Boyacá, Colombia, utilizing a multil...

Laplace-based solution for three-phase short-circuit fault in synchronous machines

Germán Guevara · Danilo Rairán

The study of synchronous machine behavior under transient conditions caused by a three-phase short-circuit fault is primarily based on two approaches: experimental analysis and simulation. Experimentally, the sudden three-phase short-circuit test applied to the machine yields a low-parameter empirical ‘short-circuit fu...

Effectiveness and Safety of Continuous Quality Improvement and Failure Mode and Effect Analysis for Preventing Adverse Events in Hospitalized Patients: A Systematic Review of Complex Interventions

Steffany Villate-Soto · Juan D. Muñoz-Loaiza · Hernando Gaitán-Duarte · Daniela Durán-Mejía · y 1 más

Background: This study aimed to assess the effectiveness and safety of continuous quality improvement (CQI) and failure mode and effect analysis (FMEA) in preventing adverse events (AEs) in hospitalized patients. Methods: This systematic review included randomized controlled trials, quasiexperiments, and time-series st...

Microplastic abundance and composition along an anthropogenic pressure gradient in an Andean river (Colombia)

A. Prado-Guasca · F. A. Villa-Navarro · E. O. López-Delgado · V. A. Arana-Rengifo · y 1 más

Abstract This study evaluated the presence, distribution, and composition of microplastics in the Combeima River sub-basin (Tropical Andes, Colombia), under the hypothesis that their abundance increases with greater anthropogenic pressure. Sampling was conducted along an altitudinal gradient to characterize microplasti...

Cross-moment interaction in multivariate semi-nonparametric densities for risk forecasting

Inés Jiménez · Andrés Mora-Valencia · Javier Perote

Abstract This paper introduces the moment interaction between different assets in the semi-nonparametric modeling of a multivariate distribution. We analyze bivariate portfolios where skewness and kurtosis may interact between different assets, showing that these new parameters may be significant pieces of information,...

Quadratic Boussinesq approximation and quadratic thermal radiation effects on thermal transport analysis of unsteady Casson hybrid nanofluid flow

Arindam Sarkar · Arpita Mandal · Gopinath Mandal

Purpose This research aims to investigate the unsteady magnetohydrodynamic (MHD) flow and heat transfer of a Casson gold-silver/water hybrid nanofluid over an inclined stretching surface. The study is specifically designed to optimise localised hyperthermia and “thermal dose” delivery in cancer ablation by modelling th...

Guerra en Irán y fútbol, ¿silenciará la diplomacia deportiva a las armas durante el Mundial 2026?

Fernando Cvitanic

Azadirachtin toxicity against larval instars of Spodoptera frugiperda (J.E. Smith): ontogenetic thresholds and lethal time dynamics under high-mountain laboratory conditions

Humberto Giraldo-Vanegas · Mayda Yarely Reatiga-Pulido · Zilenyi Vanessa Cañas-Meaury

Abstract BACKGROUND Azadirachtin, derived from Azadirachta indica A. Juss., is increasingly valued as a botanical insecticide for Integrated Pest Management (IPM) programs. However, most toxicological data on azadirachtin against Spodoptera frugiperda (J.E. Smith) have been generated under lowland tropical conditions (...

El emprendimiento universitario en Colombia desde el apoyo familiar, persistencia emprendedora y desempeño

Edgar Julián Gálvez-Albarracín · César Arvey Granado-Mandinga · Juan David Peláez-León

University entrepreneurship (UE) is gaining increasing academic and organizational attention. However, there is little research on therole of family social support (FSS) in the business performance (BP) of businesses established by students. This information gap is significantgiven that SF, in its emotional (ESF) and i...