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Application of a near real-time technique for the assessment of atmospheric arsenic and metals emissions from a copper smelter in an urban area of SW Europe
No full textEmissions of metals and metalloids as a result of industrial processes, entail a great risk to human health. A high time resolution study on arsenic levels in PM10 in the city of Huelva (SW Spain) was carried out between September 2021 and September 2022. Hourly data obtained with a near real-time technique based on X-ray fluorescence were inter-compared with other offline analytical instrumentation. The results showed that the main origin of As and other metal(loid)s such as Zn and Pb, was the copper smelter located southwest to the city. Although the mean concentration of As during the study period (2.8 ng m-3) was lower than the target value (6 ng m-3) proposed by the European Directive 2004/107/EC, hourly peaks of up to 311 ng m-3 were measured. The highest concentrations of arsenic were reached in the early afternoon, related to the influence of breeze. A source apportionment study has identified five major sources of PM10: mineral, marine, combustion, regional and industry. The industrial source is characterized by high concentrations of As, Cu, Pb and Zn, contributing 1% of the total concentration of PM10 and related to copper smelter emissions. In addition, the analysis of two extreme North African dust outbreak events that affected southwestern Europe in March 2022, showed that this natural source contributed slightly to arsenic levels. The need to carry out high time resolution studies is demonstrated to better understand the variability in exposure to industrial metal(loid)s by the population, compared to conventional 24-h studies.This project has received funding from the European Union′s Horizon
2020 research and innovation programme under grant agreement No
101036245. We would like to acknowledge the project of the Ministry of
Science, Innovation, and Universities of Spain (Project RTI 2018-
095937-B-I00 and PID2021-126986OB-I00) and the Environmental
Agency of Andalusia for financial and technical support. Funding for
open access charge: Universidad de Huelva/CBUA.Ciencias de la TierraQuímica "Profesor José Carlos Vílchez Martín"CIQS
Natural Attractions And E-Wom: Drivers Of Destination Love In Indonesian Campervan Tourism
No full textThe study aims to explore the impact of natural attractions,
electronic word-of-mouth (e-WOM), and satisfaction on
destination love within the context of campervan tourism in
Indonesia. The research utilized a sample of 483 respondents
from Jakarta and other cities in Indonesia and employed
structural equation modeling (SEM) using partial least
squares (PLS) to test eight hypotheses. The findings indicate
that natural attractions, e-WOM, and satisfaction have a
significant positive effect on destination love. Specifically,
natural attractions have a strong positive influence on
destination love, satisfaction has a weak positive effect on
destination love, and e-WOM has a strong positive effect on
both destination love and satisfaction. The study conducted a
multi-group analysis and found no significant difference
between male and female respondents in their perspectives on
the eight hypotheses. It extends previous theories by
demonstrating that satisfaction alone is not sufficient to
predict destination love, suggesting that other factors, such as
natural attractions and e-WOM, play significant roles in
influencing emotional attachment. The study's findings
recommend that tourism marketers, destination operators, and
researchers utilize insights on natural attractions and
electronic word-of-mouth (e-WOM) to improve marketing
strategies, enhance visitor experiences, and deepen the
understanding of destination love and loyalty.El objetivo del estudio es explorar el impacto de los atractivos
naturales, el boca a boca electrónico (e-WOM) y la
satisfacción en el amor por el destino en el contexto del
turismo de autocaravana en Indonesia. La investigación
utilizó una muestra de 483 encuestados de Yakarta y otras
ciudades de Indonesia y empleó el modelo de ecuaciones
estructurales (SEM) mediante mínimos cuadrados parciales
(PLS) para poner a prueba ocho hipótesis. Los resultados
indican que las atracciones naturales, el e-WOM y la
satisfacción tienen un efecto positivo significativo en el amor
por el destino. En concreto, los atractivos naturales tienen una
fuerte influencia positiva en el amor por el destino, la
satisfacción tiene un débil efecto positivo en el amor por el
destino, y el e-WOM tiene un fuerte efecto positivo tanto en el
amor por el destino como en la satisfacción. El estudio realizó
un análisis multigrupo y no encontró diferencias significativas
entre los encuestados masculinos y femeninos en sus
perspectivas sobre las ocho hipótesis. El estudio amplía las
teorías anteriores al demostrar que la satisfacción por sí sola
no es suficiente para predecir el amor por el destino, lo que
sugiere que otros factores, como los atractivos naturales y el
e-WOM, desempeñan un papel significativo a la hora de
influir en el apego emocional. Las conclusiones del estudio
recomiendan que los profesionales del marketing turístico, los
operadores de destinos y los investigadores utilicen los
conocimientos sobre los atractivos naturales y el boca a boca
electrónico (e-WOM) para mejorar las estrategias de
marketing, mejorar las experiencias de los visitantes y
profundizar en la comprensión del amor y la lealtad al destino
Biodiversity of Lepidoptera in a mid-mountain site in the southwest of the Iberian Peninsula. 2017-2019 Annualities. Description of the species Agnoea corteganensis Bernabé, Huertas, Jiménez & Vives, sp. nov., from Huelva, Spain (Insecta: Lepidoptera)
No full textSe muestran los registros recabados durante las prospecciones sistemáticas llevadas a cabo con
frecuencia mensual a lo largo de 2017, 2018 y 2019, en un recinto de 0,5 hectáreas, localizado en un
área de media montaña (600 m.s.n.m.) del suroccidente de la Península Ibérica y en el interior de los
límites del Parque Natural de la Sierra de Aracena y Picos de Aroche (PNSAPA), al norte de la
provincia de Huelva. Se actualizan los datos de especies adquiridos en estudios previos, relativos al
periodo 2003-2016 (Bernabé-Ruiz & Huertas-Dionisio, 2018) y a los años 2017 y 2018 (Bernabé-Ruiz
et al. 2019, 2020). A lo largo de 2019 se han determinado un total de 1.389 imagos de 258 especies,
pertenecientes 37 familias diferentes. Entre ellas, 75 se consideran nuevas para la parcela estudiada, 53
para el PNSAPA, 23 para la provincia de Huelva y 11 para Andalucía. La diversidad total de los 3.528
ejemplares de Lepidoptera identificados durante las tres anualidades 2017-2019 se cifra en 373 especies
de 40 familias diferentes. La diversidad total registrada en la parcela de estudio, desde 2003, incluye
414 especies agrupadas en 42 familias, un 83% de las 497 registradas en el PNSAPA hasta el momento.
Se describen los imagos y la genitalia de los ejemplares hembra capturados de la especie Agnoea
corteganensis Bernabé, Huertas, Jiménez & Vives, sp. nov. (Lypusidae). Se realiza el análisis del gen
mitocondrial Citocromo oxidasa I (COI), AND código de barras para la nueva especie.The records obtained in the systematic sampling carried out on a monthly basis during 2017, 2018
and 2019 in a half-hectare plot located in a mid-mountain site (600 m altitude) in the southwest of the Iberian Peninsula, integrated within the Sierra de Aracena y Picos de Aroche Natural Park (PNSAPA),
north of the province of Huelva, are detailed. We update the species data obtained in previous studies,
corresponding to the period 2003-2016 (Bernabé-Ruiz & Huertas-Dionisio, 2018) and to 2017 and
2018 (Bernabé-Ruiz et al. 2019, 2020). During 2019, a total of 1,389 specimens have been identified,
corresponding to 258 species, integrated in 37 different families. Of these, 75 are new for the study
plot, 53 for the PNSAPA, 23 for the province of Huelva and 11 for Andalusia. The total diversity of the
3,528 Lepidoptera specimens identified during the three years 2017-2019 is 373 species from 40
different families. The total diversity recorded in the study plot, since 2003, includes 414 species
grouped in 42 families, 83% of the 497 recorded in the PNSAPA so far. The imago and genitalia of the
two captured female specimens of the species Agnoea corteganensis Bernabé, Huertas, Jiménez &
Vives, sp. nov. (Lypusidae) are described. Analysis of the mitochondrial gene Cytochrome oxidase I
(COI), AND barcode for the new species, is presented.Ciencias Integrada
Educational interactions based on the community of inquiry model: case study of graduate students in Ecuador
Full text linkLa pandemia aceleró la integración de las Tecnologías de la Información y la Comunicación -TIC para garantizar la continuidad de los procesos educativos a través de ecosistemas y entornos virtuales de aprendizaje ante la ausencia de una presencialidad en el aula de clase. En la post-pandemia las TIC se han convertido en aliadas del proceso educativo. Además de su integración, se considera que es importante realizar estudios sobre las interacciones entre los actores de la comunidad educativa en entornos digitales. El presente estudio tiene como objetivo el analizar las interacciones entre los diferentes actores del proceso educativo mediado con la tecnología. Como metodología de la investigación se realiza un estudio de caso en que se analizan las interacciones educativas en estudiantes de programas de posgrado de Educación, Pedagogía y Formación del Profesorado en el Ecuador y sus implicaciones a través de las tres presencias del modelo de Comunidad de Indagación (Comunidad de Indagación): la presencia cognitiva, la presencia social y la presencia de la enseñanza. Entre los resultados se evidencia que el desarrollo de una educación mediada con la tecnología requiere de interacciones dinámicas entre los diferentes agentes educativos mediadas por las TIC y los entornos virtuales. Se concluye sobre la necesidad de proponer comunidades virtuales de aprendizaje que fomenten las interacciones educativas de las presencias cognitiva, social y de la enseñanza que garanticen una experiencia educativa entre sus actoresThe pandemic accelerated an effective integration of Information and Communication Technologies (ICT) to ensure the continuity of educational processes through virtual learning ecosystems and learning management systems in the absence of face-to-face classroom instruction. In the post-pandemic era, ICT has become an ally of the educational process. In addition to an ICT integration, it is considered important to conduct studies on the interactions among the actors of the educational community in digital environments. The aim of this study is to analyze the interactions among the different actors in technology-based learning. The methodology involves a case study analyzing educational interactions among graduate students in Education, Pedagogy, and Teacher Education programs in higher education in Ecuador and their implications through the three presences of the Community of Inquiry (Comunidad de Indagación) model: cognitive presence, social presence, and teaching presence. The results show that the development of technology-based instruction requires active and dynamic interactions among different educational agents mediated by ICT and learning management systems. It is concluded that there is a need to propose virtual learning communities that foster educational interactions in the cognitive presence, the social presence, and the teaching presence of the Community of Inquiry model, ensuring an educational experience among the actors involve
Skills for the academic success of university students in virtual modality
Full text linkSe analizan las diferencias entre ser un estudiante en modalidad presencial y ser un estudiante en modalidad virtual. Para la búsqueda de las fuentes se utilizó el método PRISMA el cual garantiza la rigurosidad en la revisión sistemática de la literatura. Se indican las once principales competencias que debe poseer un estudiante universitario para tener éxito en la modalidad virtual, las cuales son autodisciplina, gestión del tiempo, competencias digitales, comunicación escrita efectiva, colaboración a distancia, autoevaluación, adaptabilidad, iniciativa, habilidad para la autorregulación emocional, pensamiento crítico y autonomía académica. Como conclusión, existen grandes diferencias entre ser un estudiante en modalidad presencial y en modalidad virtual, los segundos enfrentan desafíos que no son tan complejos para un estudiante en modalidad presencial. Los estudiantes que opten por la modalidad virtual deben poseer al menos las once principales competencias para tener mayores posibilidades de éxito académicoThe differences between being a student in face-to-face mode and being a student in virtual mode are analyzed. To search for the sources, the PRISMA method was used, which guarantees rigor in the systematic review of the literature. The eleven main competencies that a university student must possess to be successful in the virtual modality are indicated, which are self-discipline, time management, digital skills, effective written communication, distance collaboration, self-assessment, adaptability, initiative, self-help capacity. -regular. emotional, critical thinking and academic autonomy. In conclusion, there are big differences between being a student in face-to-face mode and in virtual mode, the latter face challenges that are not so complex for a student in face-to-face mode. Students who opt for the virtual modality must possess at least the eleven main competencies to have a greater chance of academic succes
Condición física y autoconcepto en estudiantes de diferentes edades en Extremadura (España)
Full text linkSelf-concept can be defined as the set of beliefs a person has about himself/herself, encompassing his/her personality and multiple dimensions. These dimensions study the perception of social and family relationships, emotional management, academic performance, and motor skills, establishing an important concept in the development of children and adolescents. On the other hand, physical fitness is a very important health parameter that encompasses both physical and psychological health. Therefore, this study aimed to examine the correlations between these two variables according to educational stage and sex. Kolmogorov-Smirnov was used to determine the normality of the data, Spearman's Rho test was applied for the correlational analysis of the dimensions of both tools (Self-concept scale AF-5 and Visual Analogical Scale of Physical Fitness Perception for Adolescents (VAS PFA, and a prediction model was also performed with the most relevant variables in students from 10 to 18 years old. The results showed high correlations between the physical dimensions and physical fitness, encompassing general, strength, and endurance as the educational stages progressed (<0.001). The overall development of school-aged children is of great interest because a positive self-concept can be influenced by physical well-being and optimal skills. In addition, children who have a positive self-concept are likely to be motivated to engage in sports and physical activities, which improves their physical health. Therefore, the health and education community could promote this through interventions in and out of the classroom for the best possible mental health.Didácticas Integrada
Degeneracy in excited-state quantum phase transitions of two-level bosonic models and its influence on system dynamics
Full text linkExcited-state quantum phase transitions (ESQPTs) strongly influence the spectral properties of collective many-body quantum systems, changing degeneracy patterns in different quantum phases. Level degeneracies in turn affect the system’s dynamics. We analyze the degeneracy dependence on the size of two-level boson models with a u(n + 1) dynamical algebra, where n is the number of collective degrees of freedom. Below the ESQPT critical energy of these models, the energy gap between neighboring levels that belong to different symmetry sectors gets close to zero as the system size increases. We report and explain why this gap goes to zero exponentially for systems with one collective degree of freedom but algebraically in models with more than one degree of freedom. As a consequence, we show that the infinite-time average of out-of-time-order correlators is an ESQPT order parameter in finite systems with n = 1, but in systems with n > 1, this average only works as an order parameter in the mean-field limit.This project received funding through Grant No. PID2022-136228NB-C21 funded by MICIU/AEI/10.13039/501100011033 and, as appropriate, by “ERDF A way of making Europe, by ERDF/EU,” by the European Union, or by the European Union
NextGenerationEU/PRTR. This work was also partially supported by the Consejería de Conocimiento, Investigación y
Universidad, Junta de Andalucía and European Regional Development Fund, through Grant No. UHU-1262561 (J.K.-R.
and F.P.-B.) and Grant No. US-1380840 (J.K.-R.), and Grant No. PY2000764. J.K.-R. also acknowledges support from a
Spanish Ministerio de Universidades “Margarita Salas” Fellowship. Computing resources supporting this work were
provided by the CEAFMC and Universidad de Huelva High Performance Computer located in the Campus Universitario
“El Carmen” and funded by FEDER/MINECO Project No. UNHU-15CE-2848.Ciencias Integrada
Non-Ideal Push–Pull Converter Model: Trade-Off between Complexity and Practical Feasibility in Terms of Topology, Power and Operating Frequency
Full text linkPower converters are the basic elements of any power electronics system in many areas and
applications. Among them, the push–pull converter topology is one of the most widespread due to its
high efficiency, versatility, galvanic isolation, reduced number of switching devices and the possibility
of implementing high conversion ratios with respect to non-isolated topologies. Optimal design and
control requires very accurate models that consider all the non-idealities associated with the actual
converter. However, this leads to the use of high-order models, which are impractical for the design
of model-based controllers in real-time applications. To obtain a trade-off model that combines the
criteria of simplicity and accuracy, it is appropriate to assess whether it is necessary to consider all
non-idealities to accurately model the dynamic response of the converter. For this purpose, this paper
proposes a methodology based on a sensitivity analysis that allows quantifying the impact of each
non-ideality on the converter behaviour response as a function of the converter topology, power and
frequency. As a result of the study, practical models that combine the trade-off between precision and
simplicity are obtained. The behaviour of the simplified models for each topology was evaluated
and validated by simulation against the most complete and accurate non-ideal model found in the
literature. The results have been excellent, with an error rate of less than 5% in all casesThis work is a contribution of the PID2020-116616RB-C31 Project supported by the Spanish
Ministry of Economy and Competitiveness, by the P20_00730 Project supported by Regional Andalusian Government under the European Union Regional Development Fund. Funding for open access
charge: Universidad de Huelva/CBUA
A Logical–Algebraic Approach to Revising Formal Ontologies: Application in Mereotopology
Full text linkIn ontology engineering, reusing (or extending) ontologies poses a significant challenge,
requiring revising their ontological commitments and ensuring accurate representation and coherent
reasoning. This study aims to address two main objectives. Firstly, it seeks to develop a methodological
approach supporting ontology extension practices. Secondly, it aims to demonstrate its feasibility
by applying the approach to the case of extending qualitative spatial reasoning (QSR) theories. Key
questions involve effectively interpreting spatial extensions while maintaining consistency. The
framework systematically analyzes extensions of formal ontologies, providing a reconstruction of
a qualitative calculus. Reconstructed qualitative calculus demonstrates improved interpretative
capabilities and reasoning accuracy. The research underscores the importance of methodological
approaches when extending formal ontologies, with spatial interpretation serving as a valuable case
study.This research was funded by Project PID2019-109152G, funded by the State Investigation Agency (Agencia Estatal de Investigación), MCIN/AEI/10.13039/501100011033
Institucionalización de las políticas públicas de economía social como estrategia frente a los retos globales: evidencia de la experiencia española
Full text linkThis paper explores the process of increasing institutionalization of the
social economy, focusing on its critical role in addressing global challenges,
especially during crises. Through the theoretical identification of components
that characterize the institutionalization of social economy, the study
identifies the challenges faced and highlights Spain as a model of effective
institutionalization practices in terms of recognition, regulation, institutional
support, policies and programs, and participation in representative bodies.
Two distinct forms of institutionalization are distinguished: socio-cognitive
and political. Spain's leadership is noteworthy for integrating these forms,
translating conceptual ideals into tangible policies.Este artículo explora el proceso de creciente institucionalización de la economía social, centrándose en su papel fundamental a la hora de abordar los retos mundiales, especialmente durante las crisis. Mediante la identificación teórica de componentes que permiten caracterizar la institucionalización de la economía social, el estudio identifica los retos a los que se enfrenta y destaca a España como modelo de prácticas eficaces de institucionalización en términos de reconocimiento, regulación, apoyo institucional, políticas y programas y participación en organismos de representación. Se distinguen dos formas distintas de institucionalización: sociocognitiva y política. El liderazgo de España destaca por integrar y combinar estas formas, traduciendo ideales conceptuales en políticas tangibles