University of Leon

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    Influence of joints-stiffness on the vibration response of two real highfrequency CLT floors

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    [EN] Nowadays, the building construction industry accounts for around the 11% of the global carbon footprint. In this context, Engineering Wooden Products as cross-laminated (CLT) or glue-laminated timber are positioned as cost-effective options for reducing the structural embodied carbon of modern buildings. Despite its benefits, timber is a lightweight material much more responsive to external dynamic loads. In fact, regarding modern timber floors, the assessment of their vibration serviceability limit state (VSLS) under human-induced dynamic loading is a challenge currently opened, with remaining unanswered queries. This paper aims to shed light on some of them by providing a complete dynamic characterization and serviceability assessment of two real bare high-frequency CLT floors. The study has been focused on two main aspects: i) the influence of the joints stiffness on the dynamic behaviour of the floors, ii) The VSLS of high frequency floors with fundamental frequencies over 15 Hz.Belén Vecino acknowledges the Fundación Agustín de Betancourt for the financial support provided for the development of her doctoral thesi

    Labor rights of victims of gender violence: considerations after twenty years of validity of the Comprehensive Protection Law

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    [ES] El trabajo de fin de grado se analizan los derechos laborales de las víctimas de violencia de género tras dos décadas de vigencia de la Ley 1/2004, de 28 de diciembre, de Medidas de Protección Integral contra la Violencia de Género. Después de analizar lo que supone la “violencia de género” en el marco del ordenamiento jurídico español, vamos a comprobar cómo es capaz de suscitar reacciones en las políticas laborales y de seguridad social que se trasladan a medidas concretas que suponen distintos derechos en este ámbito para las trabajadoras víctimas de esta lacra. Llevaremos a cabo la estructuración de dichas medidas a partir del contenido de la Ley Orgánica 1/2004, ya mencionada que, resulta capital en la regulación de esta materia, porque consagra y garantiza una serie de derechos laborales a las mujeres víctimas de violencia de género con la clara finalidad de que estas víctimas puedan conciliar sus obligaciones laborales con sus necesidades de protección y de recuperación integral. Después de dos décadas en vigor desde su promulgación esta norma ha puesto de manifiesto sus numerosas bondades y también algunos defectos que convendría corregir en su posible rediseño futuro. Sistematizaremos el análisis de los derechos en cuatro grandes categorías: derechos laborales, derechos vinculados a las prestaciones de la Seguridad Social, derechos en materia de empleo para la inserción laboral y, por último, derechos económicos cerrando con las conclusiones a las que nos ha llevado la realización de este trabajo.[EN] This final degree project analyzes the labor rights of victims of gender-based violence after two decades of Law 1/2004, of December 28, on Comprehensive Protection Measures against Gender-Based Violence. After analyzing what "gender-based violence" entails within the framework of the Spanish legal system, we will examine how it can provoke responses in labor and social security policies that translate into concrete measures that entail different rights in this area for female workers who are victims of this scourge. We will structure these measures based on the aforementioned Organic Law 1/2004, which is crucial in regulating this matter because it enshrines and guarantees a series of labor rights for women victims of gender-based violence, with the clear objective of enabling these victims to reconcile their work obligations with their needs for protection and comprehensive recovery. After two decades in force since its enactment, this law has demonstrated its numerous advantages and also some flaws that should be corrected in its possible future redesign. We will systematize the analysis of these rights into four broad categories: labor rights, rights linked to Social Security benefits, employment rights for job placement, and, finally, economic rights, concluding with the conclusions we have reached in the course of this work

    Decoding destination image: insights from Instagram content by residents, tourists, and influencers

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    [EN] Purpose: This study examines how Instagram shapes the destination image, focusing on the contributions of residents, tourists, and influencers. It aims to provide empirical evidence on the distinct impacts of these actors and offer insights for effective destination marketing. Methodology: A quantitative approach was used, analysing approximately 142,000 Instagram posts using advanced data techniques (web scraping and deep learning) to assess visual and textual content. Statistical tests compared engagement metrics and content types between residents, tourists, and influencers. Findings: Significant differences were found in the content posted by residents and tourists. Residents' posts received more likes, indicating stronger community engagement, and featured more faces and happy emotions, suggesting a socially oriented and positive portrayal. Influencers' posts garnered more likes and comments and included more people and positive emotions compared to non-influencers. These findings underscore the unique contributions of each group to the destination image on Instagram. Originality: This study contributes to tourism marketing and social media research by providing a detailed analysis of how different actors influence the destination image on Instagram. It utilizes AI techniques to analyse large datasets, offering methodological innovations and nuanced insights. Practical implications: DMOs should leverage residents' authenticity and influencers' reach to create an engaging destination image. Collaborating with influencers can enhance visibility, while residents' content provides authenticity and depth

    Towards a data-driven deep learning approach for automated modal identification of slender structures

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    [EN] Modal identification techniques have been widely applied to characterise the dynamic behaviour of slender structures. If a complete set of modal parameters is to be estimated, an experimental modal analysis (EMA) should be performed. Conventional modal identification tools include curve-fitting techniques, which operate in the frequency domain and are widely used. However, these methods are very time-consuming and lack robustness against real condition disturbances. In this work, a deep learning-based modal identification framework is developed to overcome time delay effects. Convolutional neural networks are used for automated modal parameter extraction from frequency response functions . The objective is to estimate the natural frequency, damping ratio and mode shape parameter of a simple system, while addressing challenges such as signal desychronisation in the measurement chain. The methodology is tested on a real structure with promising results

    Climate Change Indicators in the Mediterranean Area

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    38 páginas, ilustraciones, bibliografía[ES] El clima de la Península Ibérica está influido por su posición geográfica, la diversidad ecológica y su relieve variado. Se caracteriza por veranos calurosos y secos e inviernos templados con precipitaciones irregulares que no afectan por igual a toda la región. En las últimas décadas, se ha detectado un aumento de las temperaturas y una disminución de las precipitaciones, factores que han contribuido a un incremento en la frecuencia e intensidad de las sequías. Estas condiciones han generado impactos como incendios forestales, aridez y pérdida de recursos hídricos. Para llegar a estas conclusiones, se ha realizado una revisión bibliográfica y comparación de diversos artículos científicos centrados en la evolución climática reciente de la región. Los estudios consultados coinciden en que el cambio climático está intensificando estos fenómenos, por lo que resulta urgente desarrollar análisis predictivos y estrategias de mitigación. Este trabajo tiene como objetivo interpretar las sequías relacionadas con el cambio climático en la península, evaluar proyecciones futuras y proponer posibles soluciones. Para ello, se han analizado también datos oficiales y documentos legislativos relevantes[EN] The climate of the Iberian Peninsula is influenced by its geographical location, ecological diversity, and varied terrain. It is characterized by hot, dry summers and mild winters with irregular rainfall that does not affect the entire region equally. In recent decades, an increase in temperatures and a decrease in precipitation have been observed, contributing to more frequent and intense droughts. These conditions have led to impacts such as wildfires, aridity, and loss of water resources. To reach these conclusions, a literature review and comparison of various scientific articles focusing on recent climatic evolution in the region has been carried out. The studies consulted agree that climate change is intensifying these phenomena, making it urgent to develop predictive analyses and mitigation strategies. This work aims to interpret droughts related to climate change in the peninsula, assess future projections, and propose possible solutions. To this end, official data and relevant legislative documents have also been analyze

    Brief communication: Subvertical grooves on interproximal wear facets from the El Sidrón (Asturias, Spain) Neandertal dental sample

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    [EN] The distribution of subvertical grooves on interproximal wear dental facets from the El Sidrón (Asturias, Spain) Neandertals is described and analyzed. Out of 93 teeth, 64.5% present subvertical grooves, including a high frequency (50%) on the anterior dentition. Contrary to some studies, subvertical grooves from adjacent facets perfectly overlap each other and do not interdigitate, probably forming small channels. Both the facet and the groove surface share the same polished appearance, suggesting a common origin. Statistical analyses reveal that the number of grooves is neither dependent on the degree of occlusal wear, nor on the position on the tooth or the individual's age. However, facet width is an important factor determining the number of subvertical grooves. The etiology of subvertical grooves formation on Neandertal teeth remains unclear. Am J Phys Anthropol, 2010. © 2010 Wiley-Liss, IncSIEste trabajo fue financiado por la Consejería de Cultura del Principado de Asturia

    Neurociencia e influencers al servicio de la atención

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    [ES] En un mundo digital sobresaturado de estímulos, captar y mantener la atención del usuario se ha convertido en un desafío crucial para la comunicación y el marketing. La sobrecarga de información y la competencia constante por la atención han llevado a explorar nuevas estrategias y herramientas para entender este fenómeno. Este artículo analiza la atención del usuario desde tres enfoques clave: la neurociencia aplicada a la publicidad, el uso del big data en turismo y las estrategias de engagement de los influencers. A través de estos casos, se exploran las oportunidades y desafíos en la optimización de la atención en la era digitalS

    The civic wreath in the provincial coinage of the Roman Hispanic

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    [ES] El presente trabajo pretende realizar un completo análisis iconológico de la imagen de la corona cívica recogida en las piezas monetarias emitidas por cecas hispanas en época imperial romana. Para ello, presentamos un estudio que pretendemos exhaustivo de los diversos estratos genealógicos y de los paralelos más inmediatos de estas representaciones. Este recorrido geosincrónico y simbólico que proponemos incluye, asimismo, una completa interpretación de los distintos significados de las mencionadas imágenes, comprendiendo una detallada descripción de los diversos y análogos mensajes que pudieran, al mismo tiempo, encontrarse presentes.[EN] This paper aims to realize a complete iconological study of civic wreath’s image exhibited in the monetary pieces coined by the mints of Hispania during the Roman imperial times. For this purpose, we present an exhaustive survey of the various genealogical strata and the most immediate parallels of these representations. Furthermore, this geo-synchronous and symbolic overhaul that we propose also includes a thorough interpretation of the various meanings collected in the mentioned images, comprising a detailed description of the different and analogues messages that may be present.S

    An interpretive review of selective sweep studies in Bos taurus cattle populations: identification of unique and shared selection signals across breeds

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    [EN] This review compiles the results of 21 genomic studies of European Bos taurus breeds and thus provides a general picture of the selection signatures in taurine cattle identified by genome-wide selection-mapping scans. By performing a comprehensive summary of the results reported in the literature, we compiled a list of 1049 selection sweeps described across 37 cattle breeds (17 beef breeds, 14 dairy breeds, and 6 dual-purpose breeds), and four different beef-vs.-dairy comparisons, which we subsequently grouped into core selective sweep (CSS) regions, defined as consecutive signals within 1 Mb of each other. We defined a total of 409 CSSs across the 29 bovine autosomes, 232 (57%) of which were associated with a single-breed (Single-breed CSSs), 134 CSSs (33%) were associated with a limited number of breeds (Two-to-Four-breed CSSs) and 39 CSSs (9%) were associated with five or more breeds (Multi-breed CSSs). For each CSS, we performed a candidate gene survey that identified 291 genes within the CSS intervals (from the total list of 5183 BioMart-extracted genes) linked to dairy and meat production, stature, and coat color traits. A complementary functional enrichment analysis of the CSS positional candidates highlighted other genes related to pathways underlying behavior, immune response, and reproductive traits. The Single-breed CSSs revealed an over-representation of genes related to dairy and beef production, this was further supported by over-representation of production-related pathway terms in these regions based on a functional enrichment analysis. Overall, this review provides a comparative map of the selection sweeps reported in European cattle breeds and presents for the first time a characterization of the selection sweeps that are found in individual breeds. Based on their uniqueness, these breed-specific signals could be considered as "divergence signals," which may be useful in characterizing and protecting livestock genetic diversitySIThe authors would like to acknowledge Milagros Sánchez for providing graphical assistance for the CSS representation. BGG is funded through the Spanish “Ramón y Cajal” Programme (RYC-2012-10230) from the Spanish Ministry of Economy and Competitiveness (State Secretariat for Research, Development and Innovation). The authors gratefully acknowledge the ini- tial support for collaborative work between these two groups from the European Science Foundation through the GENOMIC- RESOURCES Exchange Grant awarded to Beatriz Gutierrez (EX/3723). This work is also included in the framework of the project AGL2012-34437 funded by the Spanish Ministry of Economy and Competitiveness (MINECO). The Roslin Insti- tute receives core funding from the British Biotechnology and Biological Sciences Research Council (BBSRC

    GWA Analysis for Milk Production Traits in Dairy Sheep and Genetic Support for a QTN Influencing Milk Protein Percentage in the LALBA Gene

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    [EN] In this study, we used the Illumina OvineSNP50 BeadChip to conduct a genome-wide association (GWA) analysis for milk production traits in dairy sheep by analyzing a commercial population of Spanish Churra sheep. The studied population consisted of a total of 1,681 Churra ewes belonging to 16 half-sib families with available records for milk yield (MY), milk protein and fat yields (PY and FY) and milk protein and fat contents (PP and FP). The most significant association identified reached experiment-wise significance for PP and FP and was located on chromosome 3 (OAR3). These results confirm the population-level segregation of a previously reported QTL affecting PP and suggest that this QTL has a significant pleiotropic effect on FP. Further associations were detected at the chromosome-wise significance level on 14 other chromosomal regions. The marker on OAR3 showing the highest significant association was located at the third intron of the alpha-lactalbumin (LALBA) gene, which is a functional and positional candidate underlying this association. Sequencing this gene in the 16 Churra rams of the studied resource population identified additional polymorphisms. One out of the 31 polymorphisms identified was located within the coding gene sequence (LALBA_g.242T>C) and was predicted to cause an amino acid change in the protein (Val27Ala). Different approaches, including GWA analysis, a combined linkage and linkage disequilibrium study and a concordance test with the QTL segregating status of the sires, were utilized to assess the role of this mutation as a putative QTN for the genetic effects detected on OAR3. Our results strongly support the polymorphism LALBA_g.242T>C as the most likely causal mutation of the studied OAR3 QTL affecting PP and FP, although we cannot rule out the possibility that this SNP is in perfect linkage disequilibrium with the true causal polymorphismSIThis work was supported by the Spanish Ministry of Science (Project AGL2009-07000) and by the European Commission by 3SR Project (Sustainable Solutions for Small Ruminants; http://www.3srbreeding.eu). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscrip

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