Buscador de Tesis y publicaciones académicas

Forced variable-coefficient Kawahara equations: closed-form traveling waves via tanh–coth and elliptic ansätze

César A. Gómez S. · Álvaro H. Salas S. · Simeón Casanova Trujillo

We investigated a forced variable-coefficient Kawahara equation as a non-autonomous extension of a classical fifth-order dispersive model arising in nonlinear wave propagation. Such equations are relevant in physical situations where the effective nonlinearity, dispersive balance, and external input vary with time, the...

Prophylactic antibiotic regimen and risk of surgical site infection in patients undergoing hysterectomy for benign disease: a retrospective cohort study

Camila Andrea Camargo Rodríguez · Dayanna Pinto-Martínez · Víctor S. Rangel · Stephanie Flórez Herrera · y 1 más

Objective To evaluate the association between prophylactic antibiotic regimen (cefazolin alone vs. cefazolin plus metronidazole) and the occurrence of surgical site infections (SSIs), as well as infection severity and management, in patients undergoing hysterectomy for benign disease. Methods A retrospective cohort stu...

Geometric distance and semantic structure: A methodological innovation for mixed methods research with HUDAP and ATLAS.ti

Jimmy William Ramírez Cano · William Manuel Mora Penagos · Diego Mauricio Rivera Pinzón

This article presents a rigorous and replicable methodological alternative for articulating quantitative and qualitative analyses within mixed-methods research, contributing to interpretive coherence by relating quantitative proximity structures to inductively derived qualitative codes. The proposed approach integrates...

Public Archaeology in South America

Marcia Bezerra · Alexander Herrera Wassilowsky

Abstract In this chapter, we examine the nature of public archaeology in South America and its status as a subfield in archaeology. Although it is accepted by some authors as a resonance of Latin-American social archaeology, public archaeology has a trajectory marked by substantial connections to the history of develop...

Real-Time Sedimentation and Operational Technology Integration to Enhance Hydropower Operational Reliability: Case Study of the Chivor Hydropower Plant in Colombia

Aldemar Leguizamon-Perilla · Johann A. Caballero · Leonardo Rojas · Francisco E. López-Cely · y 5 más

This study addresses the critical challenge of sediment-driven degradation in aging hydropower infrastructure by implementing a novel Digital Operational Technology modernization framework at the AES Chivor Hydropower Plant in Colombia. While conventional sediment monitoring relies on sporadic manual campaigns, this re...

Reduced-Order Modeling of Transient Events in Data Centers Using Dimensionality Reduction Techniques

Julio Cesar Ramírez Acero · Ricardo Isaza-Ruget · Javier Rosero-García

The present paper proposes a methodology for the analysis and modelling of transient events in a data center based on real-world high-resolution voltage and current measurements. The proposed approach includes the identification of relevant events, temporal segmentation, multivariate representation, and the application...

Cocreating innovative and sustainable business models in underserved communities: Processes, results, struggles, and solutions for rural development

Maria Alejandra Martinez Pérez · Jose Montes · Rafael Alejandro Piñeros

Binomial vs. Poisson distribution to determine the weekend effect on completed suicide.

Aníbal A. Teherán · Luis M. Pombo · Gabriel Camero-Ramos · José E. Parra · y 8 más

Objective To compare weekday and weekend suicide frequency in Colombia using Binomial and Poisson distributions to evaluate the weekend effect. Method A cross-sectional study was conducted using public administrative records of completed suicides (CSs) from 2015 to 2023, analyzing personal, temporal, and geographic var...

Rock Art in South America: New Challenges, Approaches, and Discoveries at the Beginning of the Twenty-First Century

Marcela Sepúlveda · Edithe Pereira · Johny Isla

Abstract Several recent syntheses show that the study of rock art has become a particularly relevant topic in South American archaeology. New recording and analysis techniques for these visual and material expressions have made it possible to specify aspects related to their production, location, and dating. Systematic...

CALCULATING FRACTAL DIMENSION OF THE P–V CURVE IN THE STEADY STATE OF A POWER SYSTEM, AND ITS INCIDENCE IN THE STUDIES OF VOLTAGE DYNAMICS

HECTOR A. TABARES-OSPINA · MAURICIO OSORIO

This paper proposes a method to calculate the degree of fluctuation of the curve on the variation of the voltage with respect to the real power in the steady state of a power system (PS), with the purpose of analyzing the dynamics of the voltage, using the fractal dimension (FD), which is a quantitative estimator of sp...