https://hdl.handle.net/10259/3968 2026-10-12T22:46:35Z https://hdl.handle.net/10259/12209 Mechanical Performance and Design Considerations of Bituminous Mixtures Incorporating Recycled Fibers: A Systematic Review Mourou, Chaimae; Skaf Revenga, Marta; Hernando Revenga, Manuel; Ortega López, Vanesa; Manso Villalaín, Juan Manuel Recycled fibers in bituminous mixtures are increasingly recognized for their potential to modify and reinforce asphalt mixtures, enhancing durability and reducing environmental impacts. This paper reviews the influencing themes and factors related to the incorporation of recycled fibers into bituminous mixtures, based on a systematic bibliometric analysis. A bibliometric study was conducted covering the evolution of document publications, sources, authors, countries, and the clustering of influential keywords, which frame the main themes explored in a systematic literature review. Results reveal a growing interest in case studies assessing the mechanical performance of bituminous mixtures incorporating recycled fibers, highlighting sustainability and reinforcement design development. The review discusses the main factors influencing mixture reinforcement design, the processing methods and characterization of recycled fibers, and the mechanical performance of different fiber types including plastic, plant-based, textile, and glass fibers. Overall, this work provides insights into the key factors in the literature influencing the performance of recycled fiber-reinforced bituminous mixtures and serves as a preliminary guide and reference for researchers entering this field of study. 2026-07-01T00:00:00Z https://hdl.handle.net/10259/12207 On the Validation of Measurement Techniques in Solid Mechanics Solaguren-Beascoa Fernández, Manuel Currently, there is no established rigorous method for validating measurement techniques in solid mechanics. This paper presents the appropriate statistical approach for this purpose. Validation must compare measurements obtained using different techniques, considering their standard uncertainties. The use of the measurement uncertainties is essential for the metrological rigor of the validation, which is achieved through a statistical hypothesis test based on the chi-square distribution. A similar test is also possible to define for the identification of outliers. The method is simple and easy to apply, and is presented in the form of a procedural guide. Its applicability has been shown with an example of stress measurements by photoelasticity, which have been compared with the results of a finite element analysis. 2026-06-01T00:00:00Z https://hdl.handle.net/10259/4409 Design and Evaluation of a Scalable and Reconfigurable Multi-Platform System for Acoustic Imaging Izquierdo, Alberto; Villacorta, Juan José; Val Puente, Lara del; Suárez Vivar, Luis Alfredo This paper proposes a scalable and multi-platform framework for signal acquisition and processing, which allows for the generation of acoustic images using planar arrays of MEMS (Micro-Electro-Mechanical Systems) microphones with low development and deployment costs. Acoustic characterization of MEMS sensors was performed, and the beam pattern of a module, based on an 8 × 8 planar array and of several clusters of modules, was obtained. A flexible framework, formed by an FPGA, an embedded processor, a computer desktop, and a graphic processing unit, was defined. The processing times of the algorithms used to obtain the acoustic images, including signal processing and wideband beamforming via FFT, were evaluated in each subsystem of the framework. Based on this analysis, three frameworks are proposed, defined by the specific subsystems used and the algorithms shared. Finally, a set of acoustic images obtained from sound reflected from a person are presented as a case study in the field of biometric identification. These results reveal the feasibility of the proposed system 2016-10-01T00:00:00Z