Revistas UTB ( Universidad Tecnológica de Bolívar)
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Data analysis model to categorize the level of cardiovascular risk in the Department of Atlantico-Colombia
Full text linkThis article proposes a model based on data analysis to categorize the level of cardiovascular risk in department of Atlantico-Colombia. In the process, the fundamental concepts on which this research proposal was based were identified. As a result, different risk estimation methods were identified according to the region where the studies were carried out; therefore, it was necessary to determine the most appropriate method for the target population of the proposed model, determining a cardiovascular risk prediction model validated in Colombia. To develop the model, we took into account the basis of the concepts and previous studies on cardiovascular risk estimation, identifying during the process the elements involved in the data analysis process, determining the components of the model and characterizing the functional relationships between them
Resilience of power grids in the face of climate change: an urgent challenge for engineering
Full text linkThis editorial reflects on the systemic vulnerability of power grids to extreme weather events during 2025, specifically citing European heatwaves and blackouts in Chile. It advocates for a holistic engineering approach to resilience, defined as the capacity to anticipate, adapt, and restore operations under climate stress. Looking ahead, it highlights the role of artificial intelligence and advanced modeling in managing the complexities of renewable energy integration. Reaffirming the journal’s commitment, it calls for research that aligns technological innovation with societal well-being and inclusion
Improved power quality in distribution system with renewable energy sources integration
Full text linkCustomers of electric utilities are increasingly concerned with meeting the growing energy demand. Petroleum derivatives account for 75% of global energy consumption, but issues like air pollution, global warming, and depleting petroleum supplies make sustainable energy sources a vital alternative. Distributed generation (DG) refers to renewable energy sources (RES) integrated at the distribution level, which can introduce challenges in power quality (PQ), voltage regulation, and system stability due to the intermittent nature of RES. Inverters, acting as active inductors, help mitigate harmonic currents in the system. This paper proposes a method where a shunt active filter reduces harmonic distortion in the distribution network using a control strategy based on SRF (Synchronous Reference Frame) computation. The method compensates for load current harmonics and imbalance, improving power quality at the point of common coupling (PCC) without additional power conditioning equipment. The system employs an inverter integrated with advanced control to function as both a power filter and a source of real power for the grid. The SRF technique helps detect and compensate for non-linear load currents and voltage imbalances. Simulation results using MATLAB/Simulink demonstrate the effectiveness of the proposed system across various non-linear load conditions. The PI regulator efficiently maintains the inverter's capacitance voltage, ensuring balanced grid-side flows. This method simplifies the implementation of power conditioning and enhances the system's performance at the PCC
An evaluation on industrial applications using leakage inductance and series capacitance converter
Full text linkThe 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
Agile methodologies for the digital transformation of a Colombian telecommunications company
Full text linkContemporary business dynamics drive the adoption of agile methodologies as an effective response to rapid market evolution and the need for organizational adaptability. However, implementing traditional environments faces significant challenges, especially for companies rooted in traditional practices, such as telecommunications companies in Colombia. This research project is dedicated to implementing agile methods, specifically Objectives and Key Results (OKR), in a traditional organizational context. It is recognized that challenges arise when attempting to integrate these approaches into organizational contexts that maintain practices rooted in tradition, which hinders the cultural change necessary to achieve the entity's strategic objectives. Presumably, successful implementation of OKRs must facilitate deep cultural transformation, achieve effective alignment with strategic objectives, and proactively address internal objections through engagement and communication strategies. For this purpose, we designed a methodology to implement agility in the technical transformation of a company in the TELCO sector in Colombia, considering the challenges it proposes and seeking to address them methodologically
Study on an indirect solar dryer for drying sliced bitter gourd using PCM
Full text linkSolar dryers are of significant importance in the food industry since they facilitate the preservation of various edible products, including cereals, vegetables, and fish, by effectively extracting moisture from products. In the current study, an indirect type cabinet solar dryer had been constructed to dry the bitter gourd pieces. To enhance the efficacy of the solar dryer during late evening hours, an inorganic salt, sodium thiosulfate pentahydrate (Na2S2O3. 5H2O) serving as a phase changing material (PCM), was incorporated into the collecting area of the dryer. The study examined the process parameters, including the moisture ratio, dryer inlet temperature and the outlet temperature, for the dehydration of sliced bitter gourds in two scenarios: an indirect solar dryer without phase change material (IDSD), and a solar dryer with PCM (IDSD-PCM). The experiment involved maintaining a constant mass flow rate of air at 0.07 kg/s, while operating the dryer for a duration of nine hours in an experimental day. The findings obtained were evaluated, and the impact of incorporating PCM into the indirect solar dryer was examined and reported. The findings of the study indicated that the inclusion of PCM inside the collecting area had a substantial impact on the temperature of the drying chamber, particularly during the late evening hours. Furthermore, the utilization of PCM resulted in a notable increase of 5.1% per day in the proportion of moisture extracted from sliced bitter gourds
Surface wettability analysis using a microdroplet: a numerical approach
Full text linkAnalysis of hydrophobicity is essential for learning about the characteristics of molecules, surfaces, and materials that reject water. Using a two-dimensional (2D) pseudo-potential multiphase lattice Boltzmann approach with a D2Q9 model, this work examines the influence of solid-fluid interaction strength on wettability and hydrophobicity of smooth surfaces. To ascertain the contact angle and assess the accuracy of the numerical model, the study considers the equilibrium state of a water droplet on a smooth surface. In a 200×200 lattice unit domain, droplets having a radius of 60 lattice units are used to assess the hydrophobicity of smooth surfaces. According to the research, there is a large rise in the contact area between solid walls and water droplets when the solid-fluid interaction parameter is raised, which leads to a greater degree of hydrophobicity. By measuring the contact angle between the solid and fluid-vapor interface for different surfaces, it is observed that as G_ads becomes more negative, the contact angle decreases, indicating increased surface hydrophobicity, and the effect on droplet spreading is also highlighted in the research
Challenges of variable energy resource integration and power system security: Lessons from the 2025 Iberian system blackout
Full text linkThis editorial explores the challenge posed by the growing integration of variable energy resources (VERs) into power systems, referencing the April 28, 2025 blackout in the Iberian grid as a case study. Despite robust grid infrastructure and dispatchable generation capacity, a sharp solar ramp, low demand, and limited voltage control led to system collapse. The event underscores the need for improved ancillary services, real-time visibility of distributed generation, and greater demand-side flexibility to ensure reliable operation under high VER penetration
Revolutionizing logistics: the road to electrifying goods transport vehicles in India
Full text linkThe electrification of goods transport vehicles has emerged as a crucial solution for the environmental and economic issues associated with traditional transportation systems. Progress in battery technology has significantly improved the feasibility of electrifying goods transport vehicles. Nonetheless, there are notable challenges that need to be addressed, including limited charging infrastructure, limited range, and high upfront costs, which serve as significant barriers to widespread electrification adoption in India. This paper provides a comprehensive overview of the status of electrification in goods transport vehicles, emphasizing the environmental benefits, technological advancements, existing challenges, and possible solutions in the Indian Heavy Commercial Vehicle (HCV) segment
Managing digital transformation in Industry 4.0: from technological innovation to organizational and social impact
Full text linkDigital transformation and Industry 4.0 have reshaped the way organizations design processes, make decisions, and create value across industrial, public, and social systems. This Special Issue of Transactions on Energy Systems and Engineering Applications brings together a diverse set of contributions that explore digital transformation not only as a technological phenomenon, but as a managerial, organizational, and societal challenge. The selected articles address key dimensions, including disruptive innovation assessment, business intelligence for public-sector decision-making, agile management in traditional industries, artificial intelligence in industrial quality control, operational efficiency through OEE automation, advanced sensing and data-driven modeling, digital inclusion as social innovation, and the socioeconomic impacts of ICT adoption. Together, these works offer a comprehensive view of how Industry 4.0 technologies must be strategically managed to generate sustainable value, enhance organizational performance, and promote inclusive development. This editorial contextualizes the contributions, highlights their interconnections, and outlines practical and research-oriented recommendations for advancing digital transformation management