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ZnO Sintering aid effect on Proton Conductivity of BaCe0.6Zr0.3Y0.1O3-δ electrolyte for Hydrogen sensors
No full textProton-conducting solid-state electrolytes, including perovskite-type materials, hold promise for
hydrogen sensor development. These sensors leverage the proton conductivity of such materials to
detect hydrogen gas presence. However, achieving both high density for gas tightness and good
protonic conductivity in these refractory materials can be challenging.
In this study, we propose the preparation of dense pellets of BaCe0.6Zr0.3Y0.1O3-δ using ZnO as a
sintering aid (BCZY-Zn). These pellets were extensively characterized using X-ray diffraction and
electrochemical impedance spectroscopy and compared with pellets sintered without sintering aid
(BCZY). Subsequently, BCZY-Zn electrolyte was utilized to fabricate amperometric sensors for
hydrogen monitoring. Finally, amperometric measurements were conducted at 500°C while
maintaining a voltage of 150 mV between electrodes. The sensors' performance was evaluated for
hydrogen partial pressures ranging from 12 to 100 Pa within an argon atmosphere. Additionally,
response and recovery times were calculated.info:eu-repo/semantics/acceptedVersio
Neurodevelopmental Outcomes of Mycotoxins Exposure and Effect on Brain Development in Infants and Young Children
No full textThis comprehensive literature review was conducted to identify relevant studies on mycotoxins and brain development in children. Existing studies suggest that mycotoxin exposure during critical periods of brain development may lead to neurocognitive impairments in children. Some studies have reported associations between mycotoxin exposure and reduced cognitive abilities, impaired motor skills, and behavioral problems. Additionally, mycotoxins have been shown to disrupt neural signaling pathways and interfere with neurotransmitter function, potentially contributing to neurodevelopmental disorders. This comprehensive review has provided a comprehensive overview of the possible evidence on the association between mycotoxin exposure and brain development in children and identified areas for future research.info:eu-repo/semantics/acceptedVersio
Food waste in group dining: the interplay of shame and conflict aversion in the “last piece of food” dilemma
Full text linkGroup dining at social or business occasions frequently encounters the “last piece of food” dilemma, where a single item remains uneaten when food is served to event guests on a shared plate. Despite its contribution to food waste generation in event catering, the socio-cultural and psychological drivers of this phenomenon remain unexplored. Using a mixed methods research design, this study examines the underlying factors of the “last piece of food” dilemma. The study identifies event guests’ sense of anticipated shame and desire to avoid conflict as primary drivers. The study highlights individual concern about food waste as a potential countermeasure to the “last piece of food” phenomenon. The study calls for management interventions to strengthen this concern among event guests by communicating that consuming all food on a shared plate will not be negatively judged.info:eu-repo/semantics/publishedVersio
Comedia y existencia: A propósito de cine y teatro en Edgar Neville, Enrique Jardiel Poncela y Miguel Mihura
No full textA partir de una relectura de la categoría de Comedia sobre la base de la Poética de Aristóteles y El banquete de Platón, este artículo propone una revisión de la percepción cómica de la existencia humana. Por un lado, se advierte la distinción aristotélica entre virtud y continencia como una manera de concebir el poder subversivo de la imaginación cómica en su contexto modernista. Se toman como referencias tres obras de autores de la denominada otra Generación del 27: La vida en un hilo, de Edgar Neville; Usted tiene ojos de mujer fatal, de Enrique Jardiel Poncela; y Maribel y la extraña familia, de Miguel Mihura. Los motivos del doble, de la repetición y del secreto adquieren una significación relevante en sus adaptaciones cinematográficas.info:eu-repo/semantics/publishedVersio
Development and characterization of electrochemical hydrogen sensors using different fabrication techniques
No full textTritium Breeding Modules (TBMs) aim to demonstrate tritium self-sufficiency for future fusion reactors. These modules operate at high temperatures, requiring stable, real-time and high-temperature monitoring of the tritium production and its related safety aspects. Electrochemical sensors based on perovskite-type materials are great candidates since they present good chemical stability and mechanical strength, among others. This work describes the development of electrochemical hydrogen sensors based on perovskite-type ceramic BaCe0.6Zr0.3Y0.1O3-α (BCZY). Two different technologies were used for the ceramic shaping: Cold isostatic pressing (CIP) and 3D printing. CIP was selected as a well-established technique known for its effectiveness in ceramic shaping. On the other hand, 3D printing was chosen for its suitability in determining the desired geometry through rapid and efficient prototyping. The response of the sensors was evaluated at 400, 500 and 600 ºC using hydrogen calibration mixtures in argon in a potentiometric mode. These results suggest that both, CIP and 3D-printed BCZY sensors have the ability to detect hydrogen in these environments, enabling a game-changing solution for monitoring fusion processes which require the quantification of hydrogen isotopes.info:eu-repo/semantics/acceptedVersio
Exploring the barriers and facilitators for following a sustainable diet: A holistic and contextual scoping review
No full textChanging current dietary patterns to more sustainable ones is paramount to decrease the pressure
food systems are putting onto the planet and people’s health and wellbeing. However, modifying
consumers’ behaviour is extremely challenging since multiple factors of variable nature (i.e.,
personal, socioeconomic, cultural, external…) influence food choices. For this reason, we aim to
identify consumers’ barriers and facilitators for following a sustainable and healthy diet, and
explore how these are perceived among people from different socioeconomic backgrounds. To
do so, we conducted a scoping review of the literature with a consultation phase with citizens
from Barcelona with different socioeconomic backgrounds. Results revealed one hundred
intricate factors that influence people food behaviour, which were grouped into internal, and
external factors. Although the literature generally agreed on the direction of influence from the
identified factors, the consultation phase generated substantial disagreements given the
participants’ diverse perspectives and motivations. However, some limiting factors were
commonly mentioned across groups which corresponded to feelings of distrust towards the food
industry, lack of time, disgust towards specific foods, and the high cost of foods. Differences
across socioeconomic groups were not observed except for the latter. All participants agreed that
cost acted as a barrier, although participants from higher socioeconomic backgrounds were more
capable to find arguments to overcome the price barrier. Results are necessary to acknowledge
the particularities embedded in each person and the need to design context-based interventions to
effectively overcome people’s barriers and enhance their facilitators.info:eu-repo/semantics/acceptedVersio
Understanding the Toxicity of Metal-Based Nanomaterials: Current Insights, Challenges, and Future Directions
No full textThis review provides an overview of the current knowledge regarding the nanotoxicological impact of metal-based nanomaterials intended for biomedical applications. The extensive application of nanotechnology in the biomedical field has driven a surge in the development of nanomaterials, particularly those derived from metal sources. However, the numerous formulations, experimental conditions, and physicochemical and biological parameters have raised legitimate concerns about the safety and toxicity of these nanomaterials. To complicate matters, the interaction of nanoparticles with biological environments alters their physicochemical properties, including size, surface charge, and colloidal stability, where the exposure pathway is significant. Consequently, the nanotoxicological profile of the nanomaterial also changes. This review concisely presents the primary nanotoxicology mechanisms and findings in the literature. Additionally, it offers an overview of the current state of nanotoxicology for metal-based nanomaterials and provides brief recommendations for its evaluation.info:eu-repo/semantics/acceptedVersio
Impact of strategic capabilities on digital transformation success and firm performance: theory and empirical evidence
No full textWhat is needed for organisations to succeed in digital transformation, and what is its advantage? Motivated by the ongoing high amount of failing digital transformations, this study identifies necessary predictors and outcomes of this prominent matter on the macro level. Drawing on strategic capabilities as enablers for the redefinition of business value and organisational identity in the digital era, we propose that the complementary synergies of strategic capabilities empower digital transformation success, improving firm performance. The results support the proposed model using structural equations modelling with multi-data from 154 organisations and complementary objective data. This study identifies synergistic facilitators for digital transformation success by providing an integrated portfolio of complementary capabilities (i.e., outside-in, spanning, and inside-out orientation). The study also contributes to IS research by offering a measurable conceptualisation of digital transformation success. In addition, findings empirically show the association between digital transformation success and firm performance to enable further investigations in the IS field. Finally, from the study’s findings, practical implications can guide organisations towards digital transformation success and firm performance.info:eu-repo/semantics/acceptedVersio
Evaluación de la actividad matemática
No full textUno de los objetivos clave de la evaluación en la educación matemática es
proporcionar evidencias que permitan tomar decisiones orientadas a mejorar los
procesos de enseñanza y aprendizaje de las matemáticas. Como señalan Prats,
Sanmartí y Oró (2020) “no se puede separar la evaluación del aprendizaje y, en
consecuencia, debe dejarse de concebir como una actividad propia del final del
proceso de construcción de conocimientos” (p.10). Así pues, la evaluación debe
acompañar al estudiante, a lo largo de su trayectoria formativa, constituyéndose en un
proceso continuo y enriquecedor. Este proceso comienza con la identificación de los
conocimientos iniciales, avanza mediante el análisis de lo que se va entendiendo y de
las dificultades que se presentan, exige tomar decisiones informadas sobre cómo
avanzar, y que no culmina únicamente evidenciando lo que se ha aprendido, sino
también mostrando lo que aún queda por aprender.info:eu-repo/semantics/acceptedVersio
Symbolic violence towards people with long Covid through their narratives
Full text linkLas personas con COVID persistente (CP) son unas de las más afectadas por la
pandemia del COVID-19. Aunque este fenómeno es un problema de salud a nivel
internacional las personas enfermas a menudo son invisibilizadas y desligitimizadas. El
objetivo de esta investigación es visibilizar las situaciones de violencia simbólica a las
que se enfrentan las personas con CP. Se ha utilizado una metodología de metasíntesis
cualitativa, integrando narraciones literales de personas con CP publicadas en artículos
científicos de Scopus, Web of Science y Discovery. Constatamos que, aunque en las
conclusiones de los investigadores no se menciona explícitamente el concepto de
violencia simbólica, muchos de los testimonios recopilados coinciden con algunas de las
diez dimensiones que definen dicho concepto. Concluimos que la vivencia individual de
cada una de estas dimensiones provoca situaciones de injusticia epistémica y de
indefensión.People with Long COVID (LC) are among the most affected by the COVID-19
pandemic. Although this phenomenon is a global health issue, those affected are often
rendered invisible and delegitimized. The aim of this research is to make visible the
situations of symbolic violence faced by individuals with LC. A qualitative
metasynthesis methodology has been employed, integrating literal narratives from
people with LC published in scientific articles from Scopus, Web of Science, and
Discovery. We find that, although the concept of symbolic violence is not explicitly
mentioned in the researchers' conclusions, many of the collected testimonies align with
some of the ten dimensions that define this concept. We conclude that the individual
experience of each of these dimensions results in situations of epistemic injustice and
helplessness.info:eu-repo/semantics/publishedVersio