9300 research outputs found
Sort by
Using archaeomagnetism to unravel the occupational history of a medieval site: Cañada Real (Burgos, Northern Spain)
Get PDFDifferent attempts to date the archaeological site of Cañada Real (Northern Spain) with radiocarbon yielded contrasting results, ranging from the Bronze Age to medieval times. During the archaeological interventions carried out there, a well-preserved burned surface was discovered. The burned sediments of this surface offered the opportunity to conduct full-vector archaeomagnetic dating to elucidate the age of the studied site. For determination of an archaeomagnetic intensity, two different methods (Thellier-Coe and Tsunakawa-Shaw) were applied to test their suitability and compare their reproducibility. Raman spectroscopy and rock magnetism revealed that the main magnetization carrier is magnetite, with varying concentrations of hematite and goethite. A good correlation is observed between high Qn ratio values (typically > 6) and strongly magnetic as well as stable orthogonal demagnetization diagrams of the natural remanent magnetization. The full-vector was recovered with a mean direction of Declination = 17.7°, Inclination = 54.0°, α95 = 3.2°, k = 309.2 and a mean intensity of 38.1 ± 9.0 µT. Comparison to the SCHA.DIF.4 k geomagnetic field model yielded a single dating interval of 995–1125 CE at 95 % confidence level. This result accurately dates one of the phases of abandonment of the site and coincides with some historically documented Muslim razzias, demonstrating the usefulness of the archaeomagnetic technique to reconstruct the occupational history of archaeological sites with burned remains.We would like to acknowledge Cañada Real excavation staff for their help in the sampling campaign, as well as Caleruega municipal council. This research has been supported by project PID2019105796GB-I00 of the Agencia Estatal de Investigación and project BU037P23 of the Junta de Castilla y León and the European Regional Development Fund. Eva Vernet Tarragó acknowledges funding from PRE2020-094803 (Agencia Estatal de Investigación) contract
La pobreza como atractivo turístico: características e impactos
Get PDFLa exploración de zonas deprimidas y con niveles de desarrollo insuficientes en las grandes ciudades o
áreas rurales del sur global se ha convertido en una actividad de alta demanda dentro del sector turístico
por parte de ciudadanos procedentes de países desarrollados. Su finalidad consiste en experimentar en
primera persona la observación de situaciones de desigualdad y pobreza en las que sobreviven otros
seres humanos. Se trata de un negocio cada vez más rentable y que proporciona altos beneficios para
quienes se aprovechan de estas realidades.
El presente trabajo describe y analiza este fenómeno y sus orígenes, y explicar su impacto en las zonas
a las que afecta, ilustrándolo con algunos casos reales y, por último, trata de comprender, a través de
una encuesta, el nivel de conocimiento de esta realidad turística y las motivaciones existentes detrás de
este tipo de turismo.The exploration of depressed areas with insufficient levels of development in large cities or rural areas of
the global south has become an activity in high demand within the tourism sector by citizens from
developed countries. Its purpose is to experience first-hand the observation of situations of inequality and
poverty in which other human beings survive. It is an increasingly profitable business that provides high
benefits for those who take advantage of these realities.
This work aims to describe and analyze this phenomenon and its origins, as well as explain its impact on
the areas it affects by illustrating it with some real cases and, finally, try to understand, through a survey,
the level of knowledge of this tourist reality and the motivation behind this type of tourism
STEAMlizando el agua: un enfoque interdisciplinar para el acercamiento a la indagación en educación infantil
Get PDFEste Trabajo de Fin de Grado propone un proyecto educativo destinado a la etapa de
Educación Infantil, en el que se integran la metodología del storytelling, el enfoque STEAM
(Ciencia, Tecnología, Ingeniería, Arte y Matemáticas) y la indagación científica. El proyecto
se centra en el tema del agua como eje articulador de actividades didácticas diseñadas para
niños y niñas de 3 a 4 años. A través de cuentos, experimentos y dinámicas lúdicas, se
pretende fomentar el pensamiento crítico, la creatividad, la conciencia medioambiental y el
desarrollo emocional. El proyecto busca establecer conexiones significativas entre los
contenidos científicos y la experiencia cotidiana de los niños, utilizando la narrativa como
vehículo de aprendizaje.This Final Degree Project presents an educational proposal for Early Childhood Education
that integrates the methodologies of storytelling, the STEAM approach (Science, Technology,
Engineering, Arts, and Mathematics), and scientific inquiry. The project focuses on water as
the central theme of educational activities designed for children aged 3 to 4. Through stories,
experiments, and playful dynamics, it aims to foster critical thinking, creativity, environmental
awareness, and emotional development. The proposal seeks to create meaningful connections
between scientific content and children’s everyday experiences, using storytelling as a
powerful learning tool
Naked-eye detection of Legionella pneumophila using smart fluorogenic polymers prepared as hydrophilic films, coatings, and electrospun nanofibers
No full textLegionella pneumophila is a significant public health threat, responsible for severe diseases such as Legionnaires’ disease. Traditional detection methods are often labour-intensive, time-consuming, and require sophisticated equipment. This study introduces smart fluorogenic polymeric materials for the naked-eye detection of L. pneumophila via protease activity. These materials, prepared as hydrophilic films, cellulose-coated linear copolymers, and electrospun nanofibers, operate on an OFF/ON FRET system, emitting fluorescence under UV light upon interaction with L. pneumophila proteases. Characterisation confirmed the successful immobilisation of the peptide substrate and its response to proteases. The sensors showed moderate to high sensitivity and specificity, with detection limits of 2.91 × 105, 3.64 × 10⁵, and 4.04 × 105 CFUs/mL for the film, copolymer, and nanofiber formats, respectively. Cross-reactivity tests identified only Pseudomonas aeruginosa as an interferent. This novel approach offers rapid, simple, and cost-effective L. pneumophila detection with visible results under UV light, suitable for clinical and environmental samples. It highlights the potential for broader pathogen detection applications.Agradecemos el apoyo financiero brindado por todos los financiadores. Se agradece el apoyo financiero proporcionado por el Fondo Europeo de Desarrollo Regional (FEDER, FEDER) y la Junta de Castilla y León -Consejería de Educación, Junta de Castilla y León - ( BU025P23 ). Este trabajo contó con el apoyo de la Junta de Castilla y León y el Ministerio de Ciencia e Innovación MICIN y el PRTR NextGenerationEU de la Unión Europea . El autor Saúl Vallejos recibió la beca BG22/00086 financiada por el Ministerio de Universidades de España . La autora Marta Guembe-García recibió financiación del Ministerio de Universidades-Unión Europea de España en el marco del RD 289/2021 NextGeneration EU para su puesto de posdoctorado. También agradecemos el apoyo financiero proporcionado por MCIN/AEI/ 10.13039/501100011033 y por “ FEDER Una manera de hacer Europa ” (subvención PID2020-113264RB-I00 ). Edurne González agradece el apoyo financiero del Ministerio de Ciencia e Innovación español (Proyectos de I+D+i, subvención PID2020-117628RJ-I00 ). Issei Otsuka agradece el apoyo financiero del Centro Nacional Francés de Investigación Científica (subvención Emergence International)
Management of wind-turbine blade waste as high-content concrete addition: Mechanical performance evaluation and life cycle assessment
No full textThe management of end-of-life wind-turbine blades in the coming years will be necessary, as a clear solution for their recycling is yet to be found due to their complex composition. The suitability of their mechanical recycling is therefore evaluated in this paper, obtaining Raw-Crushed Wind-Turbine Blade (RCWTB) for subsequent incorporation in high amounts of up to 10% vol. in concrete, replacing the aggregates to achieve Fiber-Reinforced Concrete (FRC). Compressive strength levels of 40 MPa were at all times reached, although with steadily decreasing elastic moduli, properties that could be precisely related by regression using a hardened-density correction. Besides, tensile splitting strength increased by 0.03 MPa per 1% RCWTB and Poisson's coefficient was reduced, while maintaining flexural strength levels. Finally, life cycle assessment showed lower global warming potential for mixes with RCWTB, even compared to other FRC mixes, as the contents related to high-emitting raw materials of FRC were reduced. The results were promising and reveal a path towards greater sustainability of the wind-energy sector in alliance with the concrete industry.This research work was supported by the Spanish Ministry of Universities, MICINN, AEI, EU, ERDF and NextGenerationEU/PRTR [grant numbers PID2020-113837RB-I00; 10.13039/501100011033; TED2021-129715 B–I00; PID2023-146642OB-I00; FPU21/04364]; the Junta de Castilla y León (Regional Government) and ERDF [grant number UIC-231; BU033P23; BU066-22]; and, finally, the University of Burgos [grant number SUCONS, Y135. GI]
Dataset of the Project TED2021-129715B-I00 (UBU, SUCONS group)
No full textThis dataset contains the data generated during the execution of the project “REcycling of WIND turbine blades and foundations in concrete for new high-power wind farms (REWIND)”, code TED2021-129715B-I00, corresponding to the 2021 Call of “Proyectos estratégicos orientados a la transición ecológica y a la transición digital, del Plan Estatal de Investigación Científica, Técnica y de Innovación para el período 2021-2023", within the framework of the "Plan de Recuperación, Transformación y Resiliencia (PRTR)" of the European Union, funded by MICIN/AEI/10.13039/501100011033 and NextGenerationEU/PRTR.The research work conducted within the framework of the REWIND project (TED2021-129715B-I00), which was funded by the Ministry of Science and Innovation of the Government of Spain (Ministerio de Ciencia e Innovación del Gobierno de España), the State Research Agency (Agencia Estatal de Investigación, AEI), the European Regional Development Fund (Fondo Europeo de Desarollo Regional, FEDER) and the European Union (EU) NextGenerationEU/PRTR through the 2021 Call of "Proyectos estratégicos orientados a la transición ecológica y a la transición digital, del Plan Estatal de Investigación Científica, Técnica y de Innovación para el período 2021-2023"
Fenómenos meteorológicos (cada vez más) extremos. Una secuencia didáctica integrada para el nivel secundario
No full textLa creciente frecuencia, intensidad y duración de los fenómenos meteorológicos extremos, agravada por el cambio climático, exige ciudadanos críticos y proactivos que puedan protegerse y fomentar actitudes similares en la sociedad. Estos problemas socio-científicos requieren un enfoque interdisciplinario, considerando tanto aspectos científicos como sociales. La educación secundaria es clave para generar conciencia y preparación ante estos eventos. Para ello, en el marco del proyecto “La naturaleza de STEM para la formación ciudadana” se diseñó y validó en contextos reales de sala de aula una secuencia didáctica estructurada en seis bloques: fenómenos extremos, observación y predicción, modelización en ciencia y meteorología, pronósticos, sistemas complejos y nowcasting. Esta propuesta permite comprender la naturaleza de la ciencia y su ejemplificación con la meteorología, ofreciendo flexibilidad para su adaptación en distintos contextos educativos.Esta obra es parte de los trabajos científicos pertenecientes al proyecto de investigación LA NATURALEZA DE I-STEM (NOSTEM) PARA LA FORMACIÓN CIUDADANA. Referencia PID2020-118010RB-I100. Financiado por la Agencia Estatal de Investigación
Experiencias de profesores visitantes españoles enseñando ingeniería medioambiental en Italia
No full textEl conocimiento de las diferencias educativas entre las instituciones de origen y de acogida cuando se actúa como profesor visitante es útil para una enseñanza adecuada. En esta investigación se analizan las experiencias de dos profesores visitantes españoles que habían realizado recientemente estancias académicas en Italia para enseñar ingeniería medioambiental y se contrastan con las experiencias de otros dos profesores visitantes de ingeniería. La investigación se centró en la planificación, la evaluación y la relación con los estudiantes. Se discuten las diferencias que observaron entre ambos entornos docentes y se clasifican en cuatro grupos: aspectos generales, desarrollo de la clase, interacción con los estudiantes y evaluación. Estos aspectos se discuten desde una perspectiva genérica, por lo que pueden ser útiles para futuros profesores que actúen como profesores visitantes en ingeniería. Por último, cabe mencionar que el apoyo de sus colegas de la universidad de destino fue siempre clave para el éxito de la docencia en opinión de todos los profesores visitantes.A level of awareness of educational differences between home and host institutions when acting as a visiting professor is useful for proper teaching. The aim of this research is to identify and discuss the differences between countries regarding university teaching in engineering, based on the experiences of two Spanish visiting professors that had recently followed academic stays in Italy to teach environmental engineering. Differences between institutions were identified by brainstorming, analyzed qualitatively by cross-coding, and validated by two other visiting professors in engineering. The differences were grouped in to four categories: general aspects, class development, interaction with students, and evaluation. It was found that prior knowledge of time tables, the distribution of classes and tutorials, the evaluation procedure, and the level of formality in the teacher-student relations hipare key for proper class development. Likewise, quality teaching implies prior knowledge of the students' level and the support of visual elements for an adequate level of understanding, thus overcoming the language barrier. These aspects are discussed from a generic perspective, so they can be useful for future teachers acting as visiting professors in engineering. Finally, it is worth mentioning that the support of their colleagues at the host university was always key for successful teaching in the opinions of all the visiting professors.The authors wish to express their gratitude to the staff of the University of Padova. Furthermore, they are thankful to both the Spanish Ministry of Universities [grant number CAS22/00013] and the University of Burgos for funding this research