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A record of a stable transitional VGP in a Pliocene lava flow sequence from the Lesser Caucasus
No full textA paleomagnetic and paleointensity study has been performed on 28 basaltic flows from a sequence in the Lesser Caucasus. Two radiometric determinations yielded 3.45 ± 0.23 Ma in its lower and 3.43 ± 0.19 Ma in its upper part. Paleomagnetic determinations in the lower section (14 flows) yielded an anomalous direction D = 252.8°, I = 43.1°, (α95 = 3.7°), reflecting a transitional record. In the upper section (14 flows), a reverse polarity direction D = 185.8°, I = − 53.1°, (α95 = 2.3°) was obtained. Analysis of the scatter in paleomagnetic directions suggests that the stable anomalous direction observed throughout the lower section might have persisted for several centuries. Thellier–Coe paleointensity experiments on 165 specimens produced only 7 successful determinations. Very low paleointensity values below 10 μT were obtained in the lower, and stronger ones (35 and 50 μT) in the upper flows. Application of a pTRM-check correction to the data resulted in an important increase of successful determinations (78) and a significant intra- and inter-flow coherence of results, confirming very low paleointensities in the lower section and stronger ones in the upper flows. 20 paleointensity determinations with the multispecimen method produced results in 16 samples (13 flows). A multimethod analysis combining results of both methods yielded paleointensities between 5.4 and 12.5 μT in the lower flows, reflecting a transitional field. The upper flows produced a mean paleointensity B = 40.9 ± 9.4 μT. The sequence seems to record the C2An.3n–C2An.3r (Gauss–Mammoth) reversal at 3.330 Ma.Work funded by project PID2024-159094NB-I00 (Spanish Agencia Estatal de Investigación AEI/10.13039/501100011033 and ERDF), project BU037P23 (Junta de Castilla y León and the European Research and Development Fund), and the Shota Rustaveli National Science Foundation of Georgia (SRNSFG) (Grant No. FR-22–19681—Volcanic facies architecture of lava flows and associated interflow horizons from Javakheti Volcanic Province– South Georgia)
Modelling the yield stress of cement pastes and mortars containing heterogeneous and unconventional aggregates like raw crushed wind turbine blade
No full textDetermining the yield stress of cementitious materials is crucial for casting and concrete mix design. Fresh concrete possesses yield stress, behaving as a solid with viscoelastic properties below this threshold. When the yield stress is exceeded, concrete flows with a steady-state behavior commonly described by the Bingham or Herschel-Bulkley models. As the construction industry increasingly consumes more and more scarce raw materials, there is a growing need to develop and explore alternative construction materials to replace traditional ones while valorizing waste. Raw Crushed Wind Turbine Blade (RCWTB) has demonstrated interesting results when included in cementitious mixtures. However, a full characterization of rheology including the yield stress of mixtures containing RCWTB is still missing and would be of great practical interest. In this paper, the yield stress of cementitious pastes and mortars containing RCWTB with two different water/cement ratios is measured. Results demonstrate higher yield stress for higher RCWTB inclusion, this is mainly due to the bridge effect of the Glass Fiber Reinforced Polymer (GFRP) contained in the RCWTB. Finally, a physical model is applied for RCWTB to predict GFRP fibers maximum packing fraction based on their geometry, elastic properties, and the rheology of the surrounding cement-based material. This model is then validated with experimental yield stress of cement pastes and mortars.Open access funding provided by Università degli Studi di Padova within the CRUI-CARE Agreement
Micropropagation and genetic uniformity of Kalanchoe daigremontiana (Crassulaceae)
No full textKalanchoe daigremontiana is an ornamental species propagated exclusively asexually. However, no in vitro studies have been conducted to assess the relationship between changes in the culture environment and genetic variations of K. daigremontiana. Therefore, this study aimed to determine the optimal concentration of salts in the Murashige & Skoog (MS) medium and the optimal concentration of sucrose in the culture medium, in addition to the quality of light, in the development of in vitro plantlets from leaf explants of K. daigremontiana. Additionally, a genetic evaluation of the resulting plantlets was conducted to study phenotypic changes that could be attributed to somaclonal variation using Random Amplified Polymorphic DNA (RAPD) markers. For this purpose, leaf explants of K. daigremontiana were disinfected and inoculated in different salt concentrations (25, 50, and 100%) of MS medium without sucrose. The cultures were transferred to a growth chamber and subjected to three light conditions (white, blue, and red) with a 16-hour photoperiod, plus the absence of light, at a temperature of 27 ± 1 °C. Explants were also inoculated in 50% salt concentrations of MS medium supplemented with various concentrations of sucrose (control - without sucrose, 1.5, 3.0, 4.5, and 6.0%). K. daigremontiana leaf explants showed optimal development under white light and in any MS medium salt concentrations. A sucrose-free culture medium was viable, and no genetic variation was observed in the plantlets compared to the parent plants under the tested conditions
University students’ assessment of people with disabilities
No full textActualmente en las aulas universitarias hay alumnado con alguna discapacidad, desarrollando con
normalidad sus estudios, en algunos casos con las adaptaciones oportunas en metodologías, recursos, entre
otros. El objetivo del estudio fue conocer la valoración que el alumnado universitario tiene hacia las personas
con discapacidad, incidiendo en sus capacidades y limitaciones. Metodológicamente se ha aplicado la escala
de Verdugo, Arias y Jenaro (1998) a estudiantes de primero y segundo curso de los Grados de Pedagogía y
Educación Social de la Universidad de Burgos (España). Se muestran datos descriptivos de 137 participantes,
tablas de contingencia, contraste de hipótesis, t de Student, y correlaciones. Los resultados constatan que
mayoritariamente los estudiantes presentan actitudes positivas hacia las personas con discapacidad, existiendo
diferencias significativas en el alumnado en relación a la edad y no significativas en el factor de valoración y
limitaciones. En conclusión, se constata un avance hacia la inclusión social de las personas con discapacidad.
Actualmente en el ámbito universitario el alumnado con discapacidad se encuentra cada vez más integrado,
y en el caso de la Universidad de Burgos a través de la Unidad de Atención a la Diversidad, se apuesta por
garantizar la igualdad de oportunidades del alumnado universitario con discapacidadCurrently, there are students with disabilities in university classrooms, who are carrying out their
studies normally, in some cases with the appropriate adaptations in methodologies, resources, among others.
The objective of the study was to find out the assessment that university students have towards people with
disabilities, focusing on their capabilities and limitations. Methodologically, the scale of Verdugo, Arias and
Jenaro (1998) was applied to first and second year students of the Degrees in Pedagogy and Social Education
at the University of Burgos (Spain). Descriptive data from 137 participants, contingency tables, hypothesis
contrast, Student t test, and correlations are shown. The results confirm that the majority of students have
positive attitudes towards people with disabilities, with significant differences in the students in relation to age
and non-significant differences in the assessment and limitations factor. In conclusion, progress towards the
social inclusion of people with disabilities is confirmed. Currently, students with disabilities are increasingly
integrated in the university environment, and in the case of the University of Burgos, through the Diversity
Care Unit, there is a commitment to guarantee equal opportunities for university students with disabilities
Analysis of factors influencing the acquisition of sustainable mobility through immersive experience in primary school children
No full textGamification and Escape Rooms (ER) have emerged as effective tools for fostering attitudinal and behavioural shifts and enhancing learning. While their application in sustainable mobility remains limited, it is predominantly associated with digital games and mobile applications tailored towards an adult audience. This study explores the potential of these tools in cultivating an understanding of sustainable mobility principles among children aged 10 to 13. Through an immersive experience involving problem-solving and puzzles, 174 participating students were immersed in a playful setting conductive to assimilating knowledge about sustainable mobility. Pre- and post-experience questionnaires were administered to assess the extent of learning, and their results were categorised based on student characteristics, such as gender and mobility patterns. Using multinomial logit models to analyse the questionnaire data helped identify variables that affect the likelihood of giving correct answers before and after the experience. The results indicate that gender, bicycle usage, dependence on public transportation, and the number of cars in the household significantly impact awareness of mobility issues. Moreover, the ER experience has been found to cause a small yet noticeable change in understanding sustainable mobility concepts.This research has been made possible thanks to the Margarita Salas Fellowship funded by the European Union’s NextGenerationEU funds through the “Recovery, Transformation and Resilience Plan”. This research has been made possible thanks to fundings of the Spanish Ministry of Economics under grant “SUM+Cloud: COCREACION Y COMPATIBILIZACION DE LA INFORMACION EN LA NUBE-BORDE
XIX Simposio CEA de Control Inteligente: libro de actas
No full textSimposio presentado en: XIX Reunión anual del grupo de Control Inteligente del comité español de automática (CEA) 2024, durante los días 19-21 de junio en Burgos (España).Al igual que en las ediciones anteriores, el XIX Simposio CEA de Control Inteligente ha tratado de mantener los objetivos propuestos por el Grupo Temático de CEA y desarrollar unas jornadas de convivencia en las que se han desarrollado actividades científicas de investigación, de formación de doctores, de relaciones con la industria y, por supuesto, actividades culturales y de relaciones sociales de todos los miembros que formamos esta comunidad científica. Este año, el lugar elegido para la celebración del Simposio ha sido la ciudad de Burgos y le ha correspondido la organización al área de Ingeniería de Sistemas y Automática. Durante los últimos años el control inteligente está demostrando ser una herramienta esencial para contribuir a solucionar los grandes retos que se nos van a plantear en el futuro. En estas actas se presentan soluciones de control inteligente aplicadas en energía, robótica, producción y docencia
El maltrato infantil: una perspectiva neurobiológica y neuropsicológica
No full textLas víctimas del maltrato infantil y de las experiencias adversas de la infancia son aquel grupo de la población conformado por niños, niñas y, en definitiva, menores de 18 años, que sufren ocasional o habitualmente actos de violencia física, sexual o emocional ya sea en el grupo familiar o en las instituciones sociales. Aunque las estrategias para atenderlo y prevenirlo han aumentado, éstas siguen siendo insuficientes. Por otro lado, y siguiendo esta estrategia de intervención, cada vez hay un mayor interés en conocer el sustrato neurobiológico y las posibles consecuencias neurobiológicas que puedan emerger por haber sufrido maltrato infantil, y sobre todo en aquellas etapas del neurodesarrollo, donde el SNC comienza con el desarrollo de las funciones cognitivas que formarán al adulto posteriormente
Models of Masculinity in Childen's Books and Electronic Prehistoric Resources
No full textLos libros infantiles de prehistoria (LIP) y los recursos electrónicos de prehistoria (REP) son recursos educativos frecuentemente utilizados en el aula. Si bien se han estudiado los estereotipos de género y la presencia/ausencia de personajes masculinos y femeninos en estos formatos, no existen aún estudios específicos que aborden la representación de la masculinidad en dichos dispositivos. El objetivo central de este estudio es analizar los modelos de masculinidad en las representaciones iconográficas de una muestra de LIP (n=5) y de REP (n=2). Para ello, se construye un instrumento categorial, con vocación de replicabilidad, con datos a priori a partir de la revisión exhaustiva y sistemática de bibliografía y datos emergentes de la muestra. Desde un enfoque socio-crítico con perspectiva feminista y los principios de la literacidad visual crítica se sigue un método mixto. Por un lado, cualitativo descriptivo y por otro cuantitativo estadístico descriptivo. Los resultados obtenidos informan de la presencia extendida del modelo de masculinidad hegemónica, dificultando la transposición didáctica de los avances recientes en prehistoria y arqueología relativos a la colaboración necesaria entre sexos como parte de un mismo colectivo y donde las tareas de mantenimiento y de cuidados fueron esenciales para la vida y la supervivencia.Prehistoric children's books (PCB) and electronic prehistoric resources (EPR) are educational tools frequently used in the classroom. Although gender stereotypes and the presence/absence of male and female characters in these formats have been studied, there are still no specific studies addressing the representation of masculinity in these resources. The main objective of this study is to analyze the models of masculinityin the iconographic representations of a sample of PCB (n=5) and EPR (n=2). To achieve this, a categorical instrument is constructed, with the aim of replicability, using a priori data from a thorough and systematic review of the literature and emerging data from the sample. From a socio-critical approach with a feminist perspective and the principles of critical visual literacy, a mixed method is followed. On the one hand, qualitative descriptive and on the other quantitative descriptive statistical. The results indicate the widespread presence of the hegemonic masculinity model, hindering the didactic transposition of recent advances in prehistory and archaeology that emphasize the necessary collaboration between sexes as part of the same community, wheremaintenance and caregiving tasks were essential for life and survival
Students’ Attitudes Towards AI and How They Perceive the Effectiveness of AI in Designing Video Games
No full textThe aim of this paper is to find out what the attitudes of higher education students in arts education are towards generative AI and how this relates to their use of it in their academic/professional practice. This is a case study and an exploratory, descriptive and correlational quantitative research study, the methodology of which allows us to determine the vision of the sample of participants in relation to the subject. The design consists of three phases: (1) students complete an Attitude Towards Artificial Intelligence (ATAI) scale; (2) they then create two sketches as a collage of images to be used as visual references for a future digital illustration, one using images from the internet and the other using a generative AI tool; and (3) finally, students complete a questionnaire on their perception after using the generative AI tool used in the activity. The results show significant relationships between attitudes towards AI and perceptions of its effectiveness, efficiency, creativity, and design autonomy. It seems that the attitude with which students approach AI tools is a determining factor when it comes to using them in design tasks and can contribute to quality education
Dataset of the work “Activating the SERS features of screen-printed electrodes with thiocyanate for sensitive and robust EC-SERS analysis”
No full textThis study presents a novel electrochemical (EC) methodology for activating the SERS features of disposable silver screen-printed electrodes (AgSPEs) using a pseudohalide as a precipitating agent to guide the assembly of a nano-filamentous silver network responsible for a strong SERS enhancement. To the best of our knowledge, the use of thiocyanate for SPEs activation for quantitative purposes has not been reported before. In order to better study this complex system, time-resolved (TR) operando spectroelectrochemistry (SEC) measurements were performed by SERS and UV-Vis and correlated with SEM imaging of the electrode surface at different steps. Moreover, to significantly increase the reproducibility of the assays, a rapid EC protocol was proposed for the first time to obtain a reliable Ag/AgSCN reference electrode (RE) and a comprehensive optimization process was conducted to determine the critical parameters. Additionally, propranolol, as an emerging pharmaceutical pollutant has been selected as a model molecule to demonstrate the applicability of the method for rapid (3 min) quantitative analysis in the nM range from real river and tap water samples.Open Access funding provided thanks to the CRUE-CSIC agreement with Elsevier B.V. Ministerio de Ciencia e Innovacion and Agencia Estatal de Investigacion (MCIN/AEI/10.13039/501100011033, PID2020-113154RBC21), Ministerio de Ciencia, Innovacion y Universidades (RED2022-134120-T). M. P.-E. acknowledges Junta de Castilla y Leon and European Social Found for his predoctoral contract