http://hdl.handle.net/10498/6777 2026-11-04T19:14:31Z 2026-11-04T19:14:31Z Suffo Pino, Miguel Brea-Piñero, D. Molina Pérez, J. F. Mota Macías, José Miguel http://hdl.handle.net/10498/40500 2026-10-31T05:06:48Z 2026-01-01T00:00:00Z

RADRISK Inspector: a mobile application for shielding design and safety distance calculation in industrial gamma radiography Suffo Pino, Miguel; Brea-Piñero, D.; Molina Pérez, J. F.; Mota Macías, José Miguel Industrial gamma radiography is a widely used non-destructive testing (NDT) technique, but it involves significant radiological risks that require precise planning of shielding and safety distances. Current practices rely heavily on in-situ radiometric measurements, which are time-consuming and may increase unnecessary operator exposure during setup and verification stages. This work presents RADRISK Inspector (RRI), a cross-platform mobile application that enables real-time radiological safety planning through physics-based calculations. The system estimates minimum safety distances, required shielding thickness, and risk zoning based on radionuclide activity, exposure parameters, and material attenuation properties. In addition, RRI integrates interactive zoning maps, exposure timers, and automated dosimetric reporting compliant with international standards (IAEA, CSN), supporting full digitalization of radiological risk management workflows. The application was preliminarily verified under real industrial conditions during pipeline weld inspections using an Ir-192 source. In this field case, RRI estimated an operator safety distance of 66 m, compared with 22 m obtained from in-situ dose-rate measurements, indicating conservative behaviour consistent with its safety-first planning approach. Accordingly, RRI is not intended to replace in-situ radiometric verification or high-fidelity radiation transport modelling, but to support conservative pre-inspection planning, risk zoning and traceable professional reporting in industrial gamma radiography. RRI represents a novel and beneficial application of radioactivity in modern industry, enabling proactive radiological protection, reducing unnecessary exposure, and improving operational efficiency in gamma radiography. Its compatibility with ATEX-certified devices further supports deployment in hazardous environments. This work supports a shift in radiographic NDT from reactive measurement-based practices to predictive, physics-based safety planning.

2026-01-01T00:00:00Z Rodríguez García, Gabriela Salguero Gómez, Jorge Batista Ponce, Moisés González Rovira, Leandro Sol Illana, Irene del http://hdl.handle.net/10498/40396 2026-10-20T04:02:14Z 2026-01-01T00:00:00Z

Cold Metal Transfer-Based Wire Arc Additive Manufacturing of Al–Si Alloys: Technology Principles, Process Control, Material Behaviour and Defect Formation Rodríguez García, Gabriela; Salguero Gómez, Jorge; Batista Ponce, Moisés; González Rovira, Leandro; Sol Illana, Irene del Wire Arc Additive Manufacturing (WAAM) has gained attention as a metal additive manufacturing process producing complex large-scale components with high deposition rates and lower costs. Cold Metal Transfer (CMT) offers reduced heat input and enhanced control of metal transfer, making it suitable for aluminium. This review analyses CMT-based WAAM with a focus on Al–Si alloys, providing a synthesis for this material system and establishing a structured comparison of representative studies on process fundamentals, arc mode variants, and key processing parameters. The influence of electrical and kinematic parameters and thermal management on process and geometrical stability, microstructural evolution, defect formation, and mechanical behaviour is discussed. Process behaviour is governed by the temporal distribution of heat input within the CMT cycle and thermal history. Control of heat input can reduce porosity, microstructural heterogeneity, and geometric instability, while advanced CMT modes can improve process stability and material efficiency under appropriate process configurations. Mechanical performance depends on the interaction between process parameters, microstructure, and defects, leading to variability and anisotropy. Despite progress, challenges related to process repeatability, narrow processing windows, defect susceptibility, and predictive capability remain. Future research should focus on parameter optimization, integrated modelling, real-time control, and WAAM-specific alloys to enable reliable industrial implementation.

2026-01-01T00:00:00Z Buldo, Michele Fatiguso, Fabio Cabrera Revuelta, Elena Verdoscia, Cesare http://hdl.handle.net/10498/40097 2026-07-28T04:10:38Z 2025-04-01T00:00:00Z

Artificial Intelligence for Detecting Surface Alteration Phenomena in Stone-Built Heritage: The Case of the ‘Unfinished Church’ of Venosa Buldo, Michele; Fatiguso, Fabio; Cabrera Revuelta, Elena; Verdoscia, Cesare Point clouds and 3D models have become essential not only for the digitisation process but also for the non-invasive assessment of deterioration and potential decay mapping in Cultural Heritage, particularly in the built environment and architectural landmarks. These resources facilitate precise digital inspections and enable a comprehensive analysis of the morphological and material properties of heritage assets, in strict alignment with conservation principles. Recent advancements in Artificial Intelligence have further refined 3D data and image processing, introducing sophisticated techniques for segmentation and classification through both supervised and unsupervised learning paradigms. Building upon these breakthroughs, this study explores the semi-automatic identification of surface alterations in the stone masonry of the south-east façade of the ‘Unfinished Church’, which is part of the Most Holy Trinity Complex in Venosa (Southern Italy). The mapping process started with the photogrammetric point cloud, employing RGB colour-detection techniques, followed by the implementation of two Machine Learning algorithms (Fast Random Forest and K-Nearest Neighbours) to examine the UV texture of the polygonal model. Comparative analyses, both quantitative and qualitative, were conducted to assess the effectiveness of these methods in identifying and classifying alterations, highlighting their potential to support preservation efforts and guide future maintenance strategies.

2025-04-01T00:00:00Z Arriaza, Álvaro Miragaya, Pablo Mora Macías, Juan Reina Romo, Esther Blázquez Carmona, Pablo Marco, Fernando Arriaza, Rafael http://hdl.handle.net/10498/40025 2026-07-16T04:01:29Z 2026-07-14T00:00:00Z

Utilizing supplementary high-strength suture tying over a bone bridge enhances the effectiveness of interference screw as tibial fixation method in anterior cruciate ligament reconstruction Arriaza, Álvaro; Miragaya, Pablo; Mora Macías, Juan; Reina Romo, Esther; Blázquez Carmona, Pablo; Marco, Fernando; Arriaza, Rafael Springer Nature Background: Tibial fixation is the biomechanical weak point in anterior cruciate ligament (ACL) reconstruction, with numerous techniques proposed to address this challenge. This study evaluates the utility of a simple, costeffective system: high-strength suture tying over a bone bridge (BB). Its effectiveness as standalone fixation and as a supplement to standard interference screw (IS) fixation is compared with IS alone and supplemented with other commercial systems. Methods: A biomechanical study was conducted using six fixation methods tested on 61 specimens with bovine extensor tendons in porcine tibial models. Groups included BB alone, IS alone, and four hybrid fixation methods: IS+BB, IS+a cortical screw post (CSP), IS+a PushLock® anchor, and IS+a SwiveLock® anchor, with at least nine specimens per group. Specimens underwent cyclic load testing (500 cycles at 100–200 N) and pull-to-failure tests (20 mm/min) to measure displacement, ultimate load to failure, and stiffness. Results: Standalone BB fixation showed limited performance, with an ultimate load to failure of 357.81±90.53 N and cyclic displacement of 14.88±3.28 mm, insufficient for early rehabilitation. When combined with IS, BB significantly improved performance, achieving an ultimate load to failure of 500.55±151.24 N, comparable to commercial systems, and reducing cyclic displacement to 4.82±0.83 mm. Hybrid fixation methods lowered early failure rates to 10%, compared with 30–40% in single-method fixations, confirming enhanced stability. Conclusions: Hybrid fixation methods are more reliable than simple ones for tibial fixation. Combining IS with BB provides a biomechanically robust and cost-effective solution for ACL reconstruction. This simple, ecological and affordable method reduces early failure rates, minimizes cyclic displacement, and achieves outcomes comparable to commercial systems, offering a practical choice for improving ACL repair outcomes.

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