Author

Helena M. Ramos

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Open access Aug 2026

Comparative Evaluation of Transformer and Machine Learning Algorithms for Predicting Downstream River Stages During Spillway Release Events

Predicting downstream river stages during extreme reservoir operations remains challenging due to complex interactions between dam operation and river response. Although machine learning has shown potential for hydrological applications, there remains a gap in the comparative evaluation of Transformer-based and convent...

Duban A. Paternina-Verona, Ó. Coronado-Hernández, M. Pérez-Sánchez et al. · Electronics · 0 citations

Open access Sep 2026

Hydraulic Loss–Based Genetic Optimization and CFD Assessment of a Reversible Centrifugal-Pump Impeller Operating in Pump and Turbine Modes

This study presents a computationally inexpensive preliminary sizing and parametric-design procedure for a centrifugal-pump impeller intended for exploratory operation in pump and turbine modes. A hydraulic loss model was coupled with a real-valued genetic algorithm to screen a restricted design space without embedding...

Sebastian Atarihuana, M. Pérez-Sánchez, Helena M. Ramos et al. · Applied Sciences · 0 citations

Open access Jul 2026

Powering the Green Transition in Quad-Sectors with Hybrid Clean Energy Technologies

Hybrid renewable energy systems (HRESs) represent a promising strategy for reducing carbon emissions across multiple sectors by integrating complementary resources such as solar, wind, hydropower, and energy storage technologies. Identifying the most suitable location for a pilot installation requires a comprehensive e...

Helena M. Ramos, Chetanya Rishi, Ó. Coronado-Hernández et al. · Clean Technology · 0 citations