Universidad Tecnológica de Bolívar
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Clean energy transition in insular communities: wind resource evaluation and VAWT design using CFD and statistics
No full textContiene ilustraciones, gráficosVertical-AxisWind Turbines (VAWTs) are efficient solutions for renewable energy generation, especially in regions with variable wind conditions. This study presents an optimized design of a small-scale H-type VAWT through the integration of Design of Experiments (DOE) and Computational Fluid Dynamics (CFD), using a fractional factorial 2k−p approach to evaluate the influence of geometric and operational parameters on power output and power coefficient (Cp), which ranged from 0.15 to 0.35. The research began with a comprehensive assessment of renewable resources in Isla Fuerte, Colombia. Solar analysis revealed an average of 5.13 Peak Sun Hours (PSHs), supporting the existing 175 kWp photovoltaic system. Wind modeling, based on meteorological data andWeibull distribution, showed speeds between 2.79 m/s and 5.36 m/s, predominantly from northeast to northwest. Under these conditions, the NACA S1046 airfoil was selected for its aerodynamic suitability. The turbine achieved power outputs from 0.46 W to 37.59 W, with stabilization times analyzed to assess dynamic performance. This initiative promotes environmental sustainability by reducing reliance on Diesel Generators (DGs) and empowering local communities through participatory design and technical training. The DOE-CFD methodology offers a replicable model for energy transition in insular regions of developing countries, linking technical innovation with social development and education.Article Title
1. Introduction
2. Materials and Methods
3. Results and Discussion
4. Conclusions
ReferencesEnergías alternativa
Proposal of a Language Tourism Model Based on the Learning of Spanish as a Foreign Language to Diversify and Innovate in the Tourism Sector of Cartagena de Indias
No full textEl español es una lengua que conforme pasan los años cobra mayor interés en ser aprendida tanto por aficionados a los idiomas, como por profesionales en diferentes disciplinas que ven en el aprendizaje de idiomas, un valor agregado a sus perfiles académicos y profesionales. Esta tendencia en aumento hace de países como Colombia y ciudades como Cartagena de Indias, destinos con potencial de mercado para adquirir y explotar modelos de turismo idiomático, que concentren experiencias de inmersión cultural desde el aprendizaje del español como lengua extranjera, diversificando e introduciendo elementos innovadores en el ecosistema turístico del país y de la ciudad. En este trabajo se revisan modelos de turismo idiomático referentes de otros países, se identifican actores que intervienen en el desarrollo de este modelo de turismo y se problematiza sobre la articulación de dichos actores para posibilitar el desarrollo de modelos de turismo idiomático en el sistema local de innovación de Cartagena.Universidad Tecnológica de BolívarMagister en Gestión de la InnovaciónPregrad
When the neighborhood enters the official archive: the recovery of the photographic collection of sister Elfride
No full textIncluye fotografíasSe presenta una experiencia de recuperación de un archivo fotográfico personal y su inclusión en la fototeca de la ciudad en Cartagena de Indias (Colombia). El trabajo narra el hallazgo de un conjunto de álbumes pertenecientes a la misionera austríaca Elfride Jagersberger (1919-2017), quien se instaló en los barrios populares del suroeste de la ciudad desde finales de la década de los años 60 hasta su fallecimiento, liderando diversos procesos comunitarios . Los álbumes recuperados contienen fotografías registradas entre 1966 y 2012 en diversos sectores periféricos surgidos a causa del conflicto armado (Membrillal, Henequén, Mamonal, Arroz Barato, Albornoz, Nelson Mandela y Villa Corelca). Se combinan la investigación documental y la Investigación Acción Participativa (IAP) en una intervención social realizada junto con habitantes del barrio Nelson Mandela, un asentamiento informal levantado en 1994 por familias campesinas desplazadas por la violencia. Como resultado del proceso se conforma un fondo fotográfico que se incorpora formalmente a la Fototeca Histórica Cartagena de Indias, alcanzando así sus imágenes el estatus de patrimonio cultural de la ciudad. Este trabajo reflexiona sobre el rol de los archivos fotográficos comunitarios y personales como dispositivos para pensar críticamente la ciudad, y evidencia la utilidad de la fotografía vernácula para desarrollar procesos de memoria comunitaria en contextos vulnerables marcados por la violencia, señalando su valor como patrimonio histórico y cultural de un territorio.An experience of recovery of a personal photographic archive in the city of Cartagena de Indias is presented, based on the discovery of a set of albums belonging to the Austrian missionary Elfride Jagersberger. The recovered albums contain photographs recorded between 1966 and 2012 in various peripheral sectors that emerged as a result of the armed conflict. Documentary research and Participatory Action Research (PAR) are combined in the Nelson Mandela neighborhood, an informal settlement built in 1994 by peasant families displaced by violence. As a result of the process, a photographic collection was formally incorporated into the Cartagena de Indias Historical Photo Library. The work reflects on the role of community and personal photographic archives as devices to think critically about the city, and evidences the usefulness of vernacular photography to develop community memory processes in vulnerable and violent contexts, pointing out its value as historical and cultural heritage of a territory.Introducción
Una fototeca local para el debate por la democratización del patrimonio visuaL
Fotografía vernácula y memoria comunitaria
El hallazgo de los álbumes de la hermana Elfride
Metodología
Resultados
Exploración de los álbumes
Acciones de difusión del proceso entre la ciudadanía
Inclusión del fondo en las colecciones de la Fototeca Histórica
ReferenciasComunicación, cultura y desarrolloDesarrollo, cultura y ambiente.Derechos humanos, interculturalidad y desarrolloDesarrolo regional y loca
De la estrategia a la ejecución: Buenas prácticas para integrar inteligencia artificial y habilidades humanas en la gestión de proyectos petroquímicos en Cartagena
No full textLa brecha entre la planificación estratégica y la ejecución de proyectos constituye uno de los principales retos de las organizaciones industriales en América Latina. En el sector petroquímico de Cartagena, caracterizado por la alta complejidad de sus operaciones y su rol crítico en la economía local, esta brecha se manifiesta en retrasos, sobrecostos y dificultades para capturar beneficios estratégicos. Este artículo propone un conjunto de buenas prácticas, agrupadas en el modelo de gestión denominado 3A- PE (Alinear, Automatizar y Acompañar para Proyectos Estratégicos, que combina herramientas de inteligencia artificial (IA) y habilidades humanas críticas. A partir de una revisión de literatura académica, fuentes del Project Management Journal (PMJ), International Journal of Project Management (IJPM), Project Leadership and Society (PLAS), así como trabajos del repositorio institucional de la Universidad Tecnológica de Bolívar (UTB), se identifican prácticas de alineación estratégica, analítica avanzada y gestión del cambio que fortalecen la trazabilidad entre objetivos corporativos y resultados de proyectos. Los hallazgos evidencian que la integración de IA en portafolios, junto con el fortalecimiento del liderazgo y la gestión del cambio, permiten reducir la desconexión entre estrategia y ejecución, y resultan especialmente relevantes para el contexto petroquímico de Cartagena.Universidad Tecnológica de BolívarMagíster en Gerencia de ProyectosMaestrí
Development of an accessible system to enhance driving instruction for individuals with hearing impairments
No full textThis development took place within the framework of Resolution 20223040030355 from the Ministry of Transportation of Colombia, which states that individuals with hearing disabilities have the right to obtain driver’s licenses. Consequently, driving schools must adapt their methodologies to facilitate the participation of these individuals in classes. With the aim of improving these processes for deaf individuals during practical driving lessons, a prototype was created. This prototype incorporates an algorithm to process voice commands and route them to a speech recognition model called VOSK, along with a graphical interface implemented in Python using the PyQt5 library. Tests were conducted during practical sessions in vehicles at a driving school in the city, and a socialization session with members of an association of individuals with hearing disabilities resulted in mostly positive outcomes. The project’s approach introduces innovative methodologies compared to those used in other countries, contributing to educational and inclusive advancement through technology
Greves armadas e guerra interna na Colômbia, 2000-2022
No full textEl siguiente artículo realiza una investigación exploratoria sobre los paros armados en Colombia. Pese a ser una práctica usada por grupos irregulares en nuestro conflicto armado y otros, ha sido muy poco estudiada. Se conceptualizaron los paros armados como un tipo de repertorio de violencia usado por grupos irregulares para ejercer su gobernanza armada y demostrar control territorial o mandar un mensaje. A partir de una revisión documental de fuentes secundarias, se construyó una base de datos original sobre los paros armados ocurridos en los últimos 22 años en Colombia. Algunas conclusiones preliminares señalan que las
Fuerzas Armadas Revolucionarias de Colombia (Farc-ep) y el Ejército de Liberación Nacional (Eln) han sido las guerrillas que más recurrieron a esta práctica, aunque, posteriormente, fue también adoptada por grupos paramilitares y grupos posdesmovilización de las Autodefensas Unidas de Colombia (Auc). Esta es la primera investigación académica que ha estudiado los paros armados de manera sistemática.The following article carries out an exploratory investigation into armed strikes in Colombia.
Despite being used by irregular groups in our armed conflicts and others, it has been little
studied. Armed strikes were conceptualized as a type of repertoire of violence used by irregular
groups to exercise their armed governance and demonstrate territorial control or send a mes sage. Based on a documentary review of secondary sources, an original database was built on
the armed strikes that ocurred in the last 22 years in Colombia. Some preliminary conclusions
indicate that the Revolutionary Armed Forces of Colombia (farc-ep) and the National Libera tion Army (eln) have been the guerrillas that resorted to this practice the most, although it
was later also adopted by paramilitary groups and post-demobilization groups from the United
Self-Defense Forces of Colombia (auc). This is the first academic research that has studied
armed strikes in a systematic way.Este artigo realiza uma pesquisa exploratória sobre as greves armadas na Colômbia. Apesar de
ser prática usada por grupos irregulares em nosso conflito armado e em outros, ela tem sido
pouco estudada. As greves armadas foram conceituadas como um tipo de repertório violento
usado por grupos irregulares para exercer sua governança armada e demonstrar controle ter ritorial ou enviar uma mensagem. Com base em análise documental de fontes secundárias, foi
criado banco de dados original sobre as greves armadas ocorridas nos últimos 22 anos na Co lômbia. Algumas conclusões preliminares indicam que as Forças Armadas Revolucionárias da
Colômbia (farc-ep) e o Exército de Libertação Nacional (eln) foram as guerrilhas que mais
recorreram a essa prática, embora ela também tenha sido adotada posteriormente por grupos
paramilitares e grupos pós-desmobilização das Autodefesas Unidas da Colômbia (auc). Esta é
a primeira pesquisa acadêmica a estudar sistematicamente as greves armada
Gasification of Lenga (Nothofagus pumilio) chips in a fixed bed system for rural area implementation: Magallanes case study
No full textThis research explores the gasification of Lenga wood chips (Nothofagus pumilio) sourced from forest remnants within a fixed-bed gasification system with a 10 kWe capacity. The primary focus is on its potential application in remote rural regions. Utilizing a factorial analysis approach, we examine the influence of particle size (ranging from 3–8 mm to 8–20 mm) and the frequency of bed agitation (occurring every 2, 4, and 6 minutes) on critical performance indicators. Throughout the experimentation, the equivalence ratio (ER) remains constant within the range of 0.17–0.20. Cold efficiency demonstrates variability, spanning from 44.8% to 58.8%. Meanwhile, the High Heating Value (HHV) varies between 6.07 and 7.18 MJ/Nm³, with gasification temperatures fluctuating between 850 and 900 °C. The introduction of bed agitation, whether at high or low frequencies, has a notable impact on gas flow, leading to substantial deviations. Larger particle sizes tend to enhance gas flow and process stability but simultaneously have adverse effects on HHV, ER, and overall process efficiency. During transient analysis, it becomes evident that gas flow requires a prolonged duration to achieve stabilization. Frequent agitation cycles (at a rate of 1/140 s⁻¹) result in fewer deviations but a slower stabilization process, whereas less frequent agitation (1/380 s⁻¹) induces greater variations but accelerates the stabilization phase. This comprehensive investigation offers valuable insights into the optimization of Lenga wood chip gasification, particularly for addressing energy needs in rural areas by harnessing forest residues
An evaluation on industrial applications using leakage inductance and series capacitance converter
No full textThe Leakage Inductance and Series Capacitance (LLSC) resonant converters are exhaustively employed in a wide assortment of industries involving consumer electronics due to their benefits of good efficiency, higher power density, immunity to electromagnetic interference, low EMI and harmonic distortion, wide production extends, voltage stress is lowered and frequency at high operating characteristic. Three of the most prominent converters with LLSC topologies are explored along with thorough analyses of their merits and disadvantages. The background of LLSC resonant converters are also discussed. A significant amount of research is also being done regarding large - scale production of LLSC resonant converters, namely in order to charge electric automobiles (EVs), solar systems, LED lighting drivers, and power supply for LCD TVs. Eventually, the growth of LLSC resonant converter is explained
Narrativas verdes
No full textDigitalHuyó con su familia de la violencia en el sur de Córdoba y llegó a Cartagena buscando esperanza. Hoy, Yaneth lidera Samanea, un emprendimiento verde que no solo transforma aceite usado en oportunidades, sino que también da empleo digno, protege el medio ambiente y educa comunidades. Samanea nació cuando ella más lo necesitaba, como madre universitaria sin recursos. Con el apoyo de organizaciones como el PNUD y Cardique, convirtió esa chispa en una misión de vida: que ni una gota de aceite contamine el agua y que muchas más vidas se dignifiquen
The media framing dataset: Analyzing news narratives in Mexico and Colombia
No full textThis paper introduces “The Media Framing Dataset,” a dataset developed through an in-depth examination of news articles from 140 local newspapers in Mexico and Colombia, covering events from May 2022 to August 2023. Our dataset captures a broad spectrum of topics, including politics, immigration, public opinion, and crime. The data collection involved a meticulous keyword-based search strategy designed to identify articles that illustrate various news-framing dimensions, such as Economics, Policy, Morality, and more.
To construct this dataset, we employed a combination of manual and automated annotation techniques. Articles were categorized based on specific framing dimensions using a structured framework, developed in collaboration with experts in computational linguistics. The annotation process, conducted by trained annotators from Mexicoʼs Delfin program, guarantees both precision and depth.
“The Media Framing Dataset” serves as a valuable resource for NLP research with high potential for reuse. It is particularly suitable for analyzing cultural and linguistic nuances in media framing, assessing the impact of framing on public perception, and supporting the development of models that automatically detect framing techniques. Additionally, it provides a foundation for linguistic analysis and machine learning projects, enabling researchers and practitioners to explore media framing dynamics and develop innovative tools for media analysis.Abstract
Keywords
1. Value of the Data
2. Background
3. Data Description
4. Experimental Design, Materials and Methods
Limitations
Ethics Statement
CRediT Author Statement
Acknowledgments
Data Availability
Reference