Universidad Politécnica de Madrid

Energy-based failure criterion for macro-porous collapsible rocks

The mechanical behaviour of macro-porous collapsible rocks cannot be fully represented by classical stress-based criteria, such as the Hoek–Brown model, which neglects failure induced by structural collapse under isotropic confinement (zero deviatoric stress). In this study, an e...

Parametric Module Using Recycled Fab Lab Materials Through Digital Technologies: A COIL Strategy Toward the Circular Economy

A Fab Lab is a collaborative environment that provides shared material resources, fabrication processes, tools, and knowledge for experimentation and prototype development. This study connects a previously developed parametric module with an exploratory material-recovery workflow...

A Comparative Review and Benchmarking Evaluation of Step Detection Methods for Longitudinal Gait Assessment

Gait analysis based on inertial measurement units (IMUs) enables scalable longitudinal gait assessment, with step detection as a foundational component. However, an understanding of available step detection methods and their comparative performance across sensor placements, clini...

Improving the Circular Economy in the Iberian Pyrite Belt: Upcycling Mining Legacy Materials into Sustainable Cement-Based Composites

The mining sector is in urgent need of circular economy strategies to manage its historical environmental liabilities. This study investigates the upcycling of mining legacy materials from the Iberian Pyrite Belt (IPB) as sustainable substitutes for natural fine aggregates in cem...

The Maximum Number of Halving Lines for Finite Planar Sets—New Lower Bounds

In this paper, we deal with a challenging problem in Discrete Geometry. The problem is to maximize the number of halving lines for finite sets in the plane. With respect to this, we improve the lower bounds for the maximum number of halving lines for sets in the plane of n points...

Enhanced SynPID by Tracking Varying Targets Applied to General Anaesthesia

Closed-loop anaesthesia systems use automated controllers to regulate drug delivery and improve anaesthetic management. Although PID-based strategies have shown promising performance, challenges related to patient variability, robustness, setpoint definition, and clinical impleme...

Bridging accuracy and interpretability in predictive learning analytics: A human-centered grey-box approach

Learning analytics has been increasingly using predictive models to support educational decision-making. However, the trade-off between predictive accuracy and interpretability remains a central challenge that limits how these models can be understood and used by educators. This...

Complementarity of Empirical, Analytical and Numerical Techniques for Assessing the Stability of a Natural Cave System in the Coastal Cliffs of Las Grutas (Río Negro, Argentina)

Coastal caves developed in weak and heterogeneous cliffs constitute complex geomechanical systems in which lithological variability, structural discontinuities, groundwater seepage and marine erosion interact. Their stability assessment is particularly challenging in urbanised co...

Developing a Comprehensive Model for Explaining Treatment Adherence Behaviour: Evidence From the International Beamer Consortium

ABSTRACT Introduction Optimizing treatment adherence behaviour has become a focus in healthcare, as improved adherence enhances clinical outcomes, patient experiences and health system sustainability. For this optimization endeavour scholars have posited diverse variables divided...

Closed‐form solutions for dynamic punching shear assessment in flat slabs subjected to sudden column removal

Abstract Simplified closed‐form equations are commonly used in structural design to prevent punching shear failures of concrete flat slabs supported on columns in permanent and transient situations, whereas more advanced methods are generally used in verifications at accidental d...

Reframing Sustainability Reporting Quality Through Digital Transformation: Insights From a Systematic Literature Review

ABSTRACT Digital transformation is reshaping sustainability governance by redefining how firms ensure the integrity of corporate disclosures. While prior research has primarily emphasized process efficiency, limited attention has been paid to sustainability reporting quality (SRQ...

Forest carbon markets in afforestation projects: differences across six schemes

In recent years, there has been an increase in the number of schemes and registries accepting afforestation projects for the purpose of obtaining carbon credits. However, from the perspective of a single non-industrial private forest landowner, it is unclear which scheme is the m...

Pacing and effort distribution in Hyrox® PRO athletes: differences by sex and performance level

Hyrox ® has rapidly grown into one of the most popular High-Intensity Functional Training (HIFT) competitions, combining running and strength-based stations in a comparatively standardised format. Although pacing and effort distribution are established determinants of performance...

Simulation and Testing of Structural Composite Materials Exposed to Fire Degradation

Fiber-reinforced polymer composites are attractive for load-bearing aeronautical structures, but their use near fire zones is limited by matrix pyrolysis and the loss of through-thickness integrity. Validating thermo-structural models requires temperature data from inside the lam...

Mapping the Strength–Ductility Landscape of Recycled Polypropylene Blends Through Automated Compounding

ABSTRACT The increasing use of recycled polypropylene (rPP) in engineering applications is limited by reduced ductility and material variability. In this study, a systematic experimental and statistical analysis approach was used to investigate polypropylene (PP) blends combining...

Density Estimation in Heritage Timber Elements Using Resistograph Drilling Resistance

Accurate structural diagnosis of timber elements in historic buildings requires minimally invasive and operationally reliable assessment methods compatible with heritage conservation principles. This study aims to estimate timber density in situ directly from Resistograph drillin...

Sensitivity of urban wind CFD predictions to geometric representation: Wind-tunnel validation around complex buildings

Accurate prediction of urban wind flow depends strongly on the geometric detail used in Computational Fluid Dynamics (CFD) models, yet simplified block representations remain common in urban studies. This work combines wind-tunnel measurements and CFD simulations to quantify how...

Gamified IMU Sensor-Based System for Training Head-Orientation Tasks in Healthy Teenagers: Event-Driven Architecture and Randomised Pilot Feasibility Study

Sensor systems integrated with gamified environments have increasingly been incorporated into the monitoring of musculoskeletal disorders. This study evaluates the operational feasibility of a motion-capture system based on an inertial measurement unit for training head-orientati...

Dominant-Pole-Based Tuning Criterion for Coordinated Needle–Deflector Control in Pelton Turbines for Hybrid Wind–Hydro Power Systems

The increasing penetration of converter-interfaced renewable generation in hybrid wind–hydro power systems strengthens the frequency-regulation requirements imposed on hydropower plants, particularly in isolated power systems. In Pelton turbine installations, the deflector, tradi...

Effects of Lipid Supply Form (Whole Seed vs. Free Oil) on In Vitro Ruminal Fermentation and Methane Production of Diets for Dairy and Fattening Sheep

Enteric methane (CH4) emissions from ruminants contribute substantially to greenhouse gas production. Dietary lipid supplementation is a mitigation strategy, but its effects are variable. We evaluated the effects of lipid source (soybean, sunflower, and cardoon) and lipid supply...