University of Extremadura
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Absence of association between serve and winning point in professional padel
No full textBACKGROUND: The aim of this study was to analyze the efficiency of the serve in relation to different tactical parameters in men’s professional padel.
METHODS: A total of 1089 points - from 217 games and 19 sets - from 8 World Padel Tour matches played in 2020 were analyzed by systematic observation.
RESULTS: The results showed that the ordinary number of the set influences the efficiency of the serve (P=0.015) with more points won on serve during the second one, and more points lost during the third one. Differently, no difference emerged for the serve efficiency in terms of situation (P=0.233). Similarly, the serving situation does not affect the efficiency in key points (P=0.097) and in non-key points (P=0.706), producing more equality in Australian formation in key points. The direction of the serve in Australian formation (P=0.351) and conventional (P=0.32) does not affect its effectiveness, without effects for the second shot after the return in Australian formation (P=0.472) and conventional (P=0.458), being in both cases the backhand volley the most frequent stroke, for which the pair lose more points when serving. The number of strokes per point is associated to a higher probability of winning the point, being the number of strokes from 3 to 10 where the serving partner maintains the advantage, losing it from that stroke, in addition, there are no winning points neither with the serve nor with the serve-return.
CONCLUSIONS: There are no significant differences (but only small divergences) in most of the tactical parameters considered in terms of serve efficiency.peerReviewe
Financial education and responsible consumption in undergraduate management students
No full textIn recent years, many countries have implemented policies to promote Financial Education (FE) among citizens as a mechanism for boosting economic development and social prosperity. Since 2008, Spain has had a national FE strategy that primarily promotes basic FE among students in compulsory education. This study analyzes first-year university students’ perception of the FE acquired in earlier educational stages and its practical application in their personal lives through the acquisition of responsible consumption habits. A survey is carried out in which students are asked how certain basic financial attributes (savings, investment, budgeting, expenses, income and quality of life), translate into everyday life, and their relationship is analyzed with their perception of the importance of FE, and certain values such as honesty, responsibility and solidarity, by applying a PLS-SEM methodology. The results allow us to extract proposals for improving public policies on FE in university studies and in earlier stages.Open Access funding enabled and organized by Universidad de … …peerReviewe
Transforming creative and inclusive teaching practices with digital media with teachers. A professional development process
No full textEl análisis de la literatura muestra que la formación continua del profesorado se desarrolla desde un discurso dominante que privilegia la agencia de los/as productores/as de conocimiento (investigadores/as) frente a los/as consumidores/as (profesorado). Tomando como referencia la importancia del desarrollo profesional del profesorado en torno al uso de los medios digitales, el objetivo de este artículo es identificar cómo la interacción entre investigadores/as y profesorado puede influir para generar transformaciones esenciales para el desarrollo profesional orientado al cambio educativo y la justicia social. La investigación incluye un estudio basado en un cuestionario y la etnografía multi-situada (2021-2024) a través de observaciones participantes, entrevistas, conversaciones informales, análisis de documentos y etnografía virtual en ocho escuelas de especial complejidad, ubicadas en espacios rurales y urbanos del territorio nacional. Los resultados muestran cómo la interacción y trabajo conjunto entre investigadores/as y profesorado en torno al uso creativo de las TIC generan escenarios educativos transformadores que desafían la hegemonía dominante en los procesos de formación de profesorado. El artículo destaca aspectos clave como el compromiso del/a investigador/a, la reflexión conjunta entre investigador/a y la transformación en relación con el desarrollo profesional del profesorado y consecuentemente de las prácticas educativas.The analysis of the literature shows that continuous teacher training is developed from a dominant discourse that privileges the agency of knowledge producers (researchers) over consumers (teachers). Taking as a reference the importance of teachers’ professional development around the use of digital media, the objective of this article is to identify how the interaction between researchers and teachers can influence to generate essential transformations for professional development oriented to educational change and social justice. The research includes a questionnaire-based study and a multi-sited ethnography (2021-2024), through participant observations, interviews, informal conversations, document analysis and virtual ethnography in ten schools of special complexity, located in rural and urban areas of Spain. The results show how interaction and joint work between researchers and teachers around the creative use of ICTs generate transformative educational scenarios that challenge the dominant hegemony in teacher training processes. The article highlights key aspects such as the researcher's commitment, the joint reflection between the researcher, and the transformation concerning the professional development of teachers and, consequently, of educational practices.Proyecto de investigación estatal I+D+i ‘Discursos y prácticas de enseñanza creativas e inclusivas con medios digitales en escuelas de especial dificultad’ (PID2020-112880RB-I00)peerReviewe
Effect of incorporating biomass bottom ash and construction and demolition waste powder on the physical-mechanical properties and micro-structure of ternary-blended mortars
No full textLas cenizas de fondo de biomasa (BBA) y los residuos de construcción y demolición (RCD) son dos tipos de residuos cuyo reciclaje requiere acciones inmediatas debido a las elevadas cantidades en las que se generan a nivel mundial. Dado que actualmente la industria cementera enfrenta un verdadero desafío a escala global debido al costo ambiental implícito en la producción de cemento, el objetivo de este estudio fue evaluar la posibilidad de reutilizar dichos residuos como aditivo en ecocementos de mezcla ternaria con un menor impacto que los cementos comunes. Para lograrlo se realizó la caracterización química, física, mecánica y microestructural de las pastas y morteros fabricados con porcentajes de sustitución del 10-40% y relación 1:1. Los resultados demostraron que la mezcla de cenizas de fondo de biomasa y polvo de residuos de construcción y demolición en la misma proporción tenía capacidad para fijar la cal y que los nuevos ecocementos de mezcla ternaria elaborados con 20%, 30% y 40% de sustitución pueden clasificarse como cementos puzolánicos CEM IV/A o CEM IV/B según la norma EN 197–1. Todos los nuevos ecocementos también cumplieron con los requisitos reglamentarios en cuanto a tiempo de fraguado inicial y solidez, sin registrar problemas de trabajabilidad. Finalmente, los morteros elaborados con sustituciones de cemento hasta un 20% desarrollaron similar o mayor resistencia a la compresión y presentaron menor porosidad a una edad posterior que el mortero de referencia, lo que los hace aptos para su uso en la construcción.Biomass bottom ash (BBA) and construction and demolition waste (CDW) are two waste types whose recycling requires immediate actions due to the high quantities in which they are generated worldwide. Since the cement industry is currently facing a real challenge on a global scale due to the environmental cost implicit in cement production, the objective of this study was to evaluate the possibility of reusing those wastes as an addition in ternary-blended eco-cements with a lower impact than common cements. To achieve this, the chemical, physical, mechanical and micro-structural characterisation of the pastes and mortars manufactured with substitution percentages of 10–40% and 1:1 ratio was carried out. The results showed that the mixture of biomass bottom ash and construction and demolition waste powder in the same proportion had the capacity to fix lime and that the new ternary-blended eco-cements made with 20%, 30% and 40% substitution can be classified as CEM IV/A or CEM IV/B pozzolanic cements pursuant to the EN 197–1 standard. All of the new eco-cements also met the regulatory requirements for initial setting time and soundness, with no workability problems recorded. Finally, the mortars made with cement substitutions up to 20% developed similar or greater compressive strength and presented lower porosity at a later age than the reference mortar, making them suitable for use in construction.This study was funded by the Spanish Ministry for Science and Innovation under project PID2019–107238RB-C21 funded by MCIN/ AEI/10.13 039/501100011033, by ‘ERDF A way of making Europe’, PDC2022–133285-C21 funded by MCIN/AEI/10.13 039/501100011033, by ‘European Union NextGenerationEU/PRTR’ , funded by Spanish Ministry for Science, Innovation and Universities under project PID2022-136244OB-100 funded by MICIU/AEI/10.13039/501100011033 and by "ERDF/EU" and the IB 20131 research project financed by the Consejería de Economía, Ciencia y Agenda Digital de la Junta de Extremadura and by the European Union Regional Develop-ment Fund (ERDF). Author Paula Velardo benefitted from pre-doctoral grant FPU17/06093 of the Spanish Ministry of Education, Culture and Sport.peerReviewe
Invented and humorous voices in the Diccionario de Autoridades: creation processes from the noun diablo
No full textEl presente estudio intenta reflexionar sobre la presencia de voces recogidas en el Diccionario de autoridades (1726-1739) como inventadas y jocosas, marcas con las que se registran más de doscientos lemas en esta primera obra lexicográfica publicada por la Real Academia Española. Tras una revisión general, en la que se expondrán los mecanismos de formación que han servido para gestar las voces, se intentará analizar más en profundidad el origen de un pequeño grupo de palabras marcadas con los adjetivos inventada y jocosa, en este caso las relacionadas con el sustantivo diablo, que nos permitirá descubrir la motivación, los mecanismos que operan en su formación y el porqué de su inclusión en ese primitivo diccionario. Nos ayudaremos de la consulta de los corpus académicos Corde, Crea, Corpes xxi y, especialmente, del patrimonio léxico reunido en el Ntlle para comprobar su presencia o ausencia posteriores en la lengua española.This study attempts to reflect on the presence of words included in el Diccionario de autoridades (1726-1739) as invented and humorous, frameworks with which more than two hundred mottos are registered in this first lexicographic work published by the Real Academia Española. After a general review, in which the formative mechanisms that served to create the phrases are explained, an in-depth attempt will be made to analyze the origin of a small group of words marked with the adjectives invented and humorous. In this case, phrases related to the noun devil (diablo) allow us to discover the motivation, the mechanisms that operate in its formation, and the reason for its inclusion in that primitive dictionary. We consulted the academic corpora CORDE, CREA, CORPES XXI, and, especially, the lexical heritage gathered in the NTLLE to verify its subsequent presence and/or absence in the Spanish language.peerReviewe
Alteraciones de las vías endocítica-Lisosomal y del metabolismo energético en la distrofia miotónica tipo 1
No full textLa distrofia miotónica tipo 1 (DM1) es una enfermedad genética hereditaria de carácter autosómico dominante, causada por la expansión de repeticiones del triplete CTG en la región 3' no traducida del gen DMPK. Esta alteración conduce a la acumulación tóxica de ARN en el núcleo de las células, formando agregados llamados foci, que se encuentran predominantemente en el núcleo y, en ocasiones, en el citoplasma. En esta tesis doctoral, se estudiaron tres líneas celulares de fibroblastos primarios de individuos sanos y tres de pacientes con DM1, con diferentes números de repeticiones CTG, con el fin de caracterizar la autofagia, el metabolismo energético y, por primera vez, la vía endocítica. Los resultados mostraron que las células de pacientes con DM1 presentan una activación de la autofagia, a pesar de observarse niveles reducidos de la proteína p62/SQSTM1. Esta disminución impide el reciclaje eficiente de las mitocondrias dañadas, lo que incrementa el estrés oxidativo y altera el metabolismo energético, particularmente la síntesis de ácidos grasos. Además, se detectó un retraso en la degradación del receptor del factor de crecimiento epidérmico (EGFR) en las células DM1, posiblemente vinculado a disfunciones en el metabolismo lipídico (colesterol). Estos hallazgos sugieren que las células DM1 desarrollan una respuesta adaptativa ante la disfunción mitocondrial, reflejada en el incremento de la biogénesis mitocondrial y la glicólisis basal.Myotonic dystrophy type 1 (DM1) is a hereditary genetic disease with an autosomal dominant inheritance pattern, caused by the expansion of CTG triplet repeats in the 3' untranslated region of the DMPK gene. This alteration leads to the toxic accumulation of RNA in the cell nucleus, forming aggregates known as foci, which are predominantly found in the nucleus and, occasionally, in the cytoplasm. In this doctoral thesis, three primary fibroblast cell lines from healthy individuals and three from DM1 patients, with different numbers of CTG repeats, were studied in order to characterize autophagy, energy metabolism, and for the first time, the endocytic pathway. The results showed that cells from DM1 patients exhibit activated autophagy, despite reduced levels of the p62/SQSTM1 protein. This reduction impairs the efficient recycling of damaged mitochondria, increasing oxidative stress and disrupting energy metabolism, particularly fatty acid synthesis. Additionally, a delay in the degradation of the epidermal growth factor receptor (EGFR) was observed in DM1 cells, possibly linked to dysfunctions in lipid metabolism, specifically cholesterol. These findings suggest that DM1 cells develop an adaptive response to mitochondrial dysfunction, reflected in increased mitochondrial biogenesis and basal glycolysis.Ayuda financiera de Fundación Isabel Gemio
Ayuda financiera de la Fundación Fernando Valhondo Calaff para personal investigador predoctoral EIL0384
Social Elastic Band with Prediction and Anticipation: Enhancing Real-Time Path Trajectory Optimization for Socially Aware Robot Navigation
No full textAs social robots are projected to become an integral part of human life in the coming decades, their ability to adapt movement and trajectory when in proximity to people is essential for ensuring social acceptance during human-robot interaction. A key aspect of this adaptability involves predicting and anticipating human intents during robot navigation. Despite significant strides in the social navigation of autonomous robots within human environments, opportunities for advancements in related algorithms persist. This paper presents a novel real-time path trajectory optimization algorithm for socially aware robot navigation, grounded in the social elastic band concept, incorporating prediction and anticipation of human movements to adapt its forward velocity. Building upon the elastic band framework introduced in the 1990s for adapting robot trajectories in dynamic environments, our proposal of social elastic band differentiates between objects and human presence. This distinction allows for the definition of social interaction spaces and their relationship to the elastic band, facilitating the generation of socially accepted paths that rapidly adapt to environmental changes without causing a disturbance. Integrated into the SNAPE social navigation framework, the algorithm has been tested and validated through simulations and real-world experiments in various environments.This work has been partially funded by the PDC2022-133597-C41 project and TED2021-131739-C22 R+D+i projects, supported by Spanish MICIU/AEI/10.13039/501100011033 and the European Union’s “NextGenerationEU”/PRTR, by the PID2022-137344OB-C31 R+D+i project, supported by Spanish MICIU/AEI/10.13039/501100011033 “FEDER Una manera de hacer Europa”, “FEDER/UE”, and by the FEDER Project 0124_EUROAGE_MAS_4_E (2021–2027 POCTEP Program).peerReviewe
Low-cost tools for virtual reconstruction of traffic accident scenarios
No full textInvestigations into traffic accidents that lead to the determination of their causes and consequences are useful to all interested parties, both in the public and private sectors. One of the phases of investigation is the capture of data enabling the complete reconstruction of the accident scene, which is usually the point at which a conflict arises between the slow process of information gathering and the need to restore normal traffic flow. To reduce to a minimum the time the traffic is halted, this paper follows a methodology to reconstruct traffic accidents and puts forward a series of procedures and tools that are applicable to both large and small scenarios. The methodology uses low-cost UAV-SfM in combination with UAS aerial image capture systems and inexpensive GNSS equipment costing less than €900. This paper describes numerous tests and assessments that were carried out on four potential work scenarios (E 1 and E 2 urban roads with several intersections; E 3, an urban crossing with medium slopes; and E 4, a complex road section with different land morphologies), assessing the impact of using simple or double strip flights and the number of GCPs, their spacing distance and different distribution patterns. From the different configurations tested, the best results were achieved in those offset-type distributions where the GCPs were placed on both sides of the working area and at each end, with a spacing between 100 and 50 m and using double strip flights. Our conclusion is that the application of this protocol would be highly efficient and economical in the reconstruction of traffic accidents, provide simplicity in implementation, speed of capture and data processing, and provide reliable results quite economically and with a high degree of accuracy with RMSE values below 5 cm.peerReviewe
Autonomía de estudiantes con discapacidad intelectual en el contexto escolar según la percepción de los profesores
No full textEste estudio tiene un enfoque cualitativo y tiene como objetivo examinar las percepciones de los profesores sobre el desarrollo de la autonomía de los estudiantes con discapacidad intelectual en el contexto escolar. Se utilizaron cuestionarios y el protocolo de registro de aprendizaje como instrumentos de recolección de datos. Los participantes fueron 15 profesores de la región metropolitana de Curitiba. Los datos se recolectaron antes (pretest) y después (postest) de un Programa de formación continua de profesores, EPADI, desarrollado en el entorno virtual de aprendizaje por la Universidad Federal de Paraná. El diseño de la investigación permitió un análisis longitudinal de los cambios en la percepción de los profesores sobre la autonomía de los estudiantes. Los datos se analizaron utilizando análisis de contenido temático. Las respuestas de los profesores se categorizaron en temas relacionados con la autonomía, la autoconfianza, la experiencia directa, la individualidad, la inclusión y la igualdad, las actividades lúdicas y la participación de la familia. Los resultados indican que la autonomía, en la percepción de los profesores, se fortalece cuando el estudiante se siente confiado y valorado, y que el aprendizaje eficaz es una construcción mutua entre ambos. Además, el estudio destaca la importancia de estrategias de enseñanza personalizadas que consideren las necesidades individuales del estudiante y la participación de la familia en el desarrollo de la autonomía. Los hallazgos tienen implicaciones significativas para la práctica educativa y proporcionan valiosos conocimientos para futuras investigaciones en el área de la inclusión escolar.The data were collected before (pre test) and after (post test) a Continuing Education Program for Teachers, EPADI, developed in the virtual learning environment by the Federal University of Paraná. The research design allowed a longitudinal analysis of changes in teachers’ perception about students’ autonomy. The data were analyzed using thematic content analysis. The teachers’ responses were categorized into themes related to autonomy, self confidence, direct experience, individuality, inclusion and equality, playful activities and family participation. The results indicate that autonomy, in the teachers’ perception, is strengthened when the student feels confident and valued, and that effective learning is a mutual construction between both. In addition, the studyhighlights the importance of personalized teaching strategies that consider the individual needs of the student and the participation of the family in the development of autonomy. The findings have significant implications for educational practice and provide valuable insights for future research in the area of school inclusion.Este estudo tem abordagem qualitativa, objetiva examinar as percepções dos professores acerca do desenvolvimento da autonomia dos estudantes com deficiência intelectual no contexto escolar. Sendo utilizado questionários e o protocolo de registro de aprendizagem como instrumentos de coleta de dados. Os participantes foram 15 professores da região metropolitana de Curitiba. Os dados foram coletados antes (pré teste) e após (pós teste) a um Programa de formação continuada de profesores, EPADI, desenvolvido no ambiente virtual de aprendizagem pela Universidade Federal do Paraná. O desenho da pesquisa permitiu uma análise longitudinal das mudanças na percepção dos professores sobre a autonomia dos estudantes. Os dados foram analisados utilizando análise de conteúdo temática. As respostas dos professores foram categorizadas em temas relacionados à autonomia, autoconfiança, experiência direta, individualidade, inclusão e igualdade, atividades lúdicas e participação da família. Os resultados indicam que a autonomia, na percepção dos professores, é fortalecida quando o estudante se sente confiante e valorizado, e que a aprendizagem eficaz é uma construção mútua entre ambos. Além disso, o estudo destaca a importância de estratégias de ensino personalizadas que considerem as necesidades individuais do estudante e a participação da família no desenvolvimento da autonomia. As descobertas têm implicações significativas para a prática educacional e fornecem insights valiosos para futuras pesquisas na área da inclusão escolar.peerReviewe
Soil and foliar zinc biofortification of triticale (x “Triticosecale”) under mediterranean conditions: effects on forage yield and quality
No full textZinc (Zn) deficiency represents a significant global concern, affecting both plant and human health, particularly in regions with Zn-depleted soils. Agronomic biofortification strategies, such as the application of Zn fertilizers, offer a cost-effective approach to increase Zn levels in crops. This study aimed to assess the efficacy of soil and foliar Zn biofortification, applied as an aqueous solution of 0.5% zinc sulphate (ZnSO4·7H2O), on triticale (x “Triticosecale”) grown under Mediterranean conditions. The study was conducted over two growing seasons (2017/18 and 2018/19) in southern Spain, evaluating the effects on biomass yield; forage quality, including crude protein, Van Soest detergent fiber, organic matter digestibility, and relative forage value; and nutrient accumulation. Soil treatment consisted in the application of 50 kg of ZnSO4·7H2O ha−1 solely at the beginning of the first campaign to assess the residual effect on the second year. In contrast, the foliar treatment consisted of two applications of 4 kg of ZnSO4·7H2O ha−1 per campaign, one at the beginning of tillering and the other at the appearance of the first node. The foliar application increased the Zn content of the forage to adequate levels, while the soil application resulted in a 33% increase in biomass production, which is particularly beneficial for farmers. Overall quality was favored by the combined soil + foliar application, and no adverse antagonistic effects on other nutrients were detected. Instead, a synergistic interaction between Se and Zn was observed, which improved the efficacy of this important micronutrient for livestock and human wellbeing.peerReviewe