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Traveling motility of actin lamellar fragments under spontaneous symmetry breaking
No full textCell motility is connected to the spontaneous symmetry breaking of a circular shape. In [8], Blanch-Mercader and Casademunt performed a nonlinear analysis of the minimal model proposed by Callan and Jones [11] and numerically conjectured the existence of traveling solutions once that symmetry is broken. In this work, we prove analytically that conjecture by means of nonlinear bifurcation techniques.MCIU/AEI/10.13039/501100011033 – (RYC2022-035967-I, PID2022-140494NA-I00, PID2022-137228OB-I00, RYC2021-033698-I, PID2022-141187NB-I00)FEDER/UE – Fondo Europeo de Desarrollo Regional, FSE+ – Fondo Social Europeo PlusConsejería de Universidad, Investigación e Innovación & ERDF/EU Andalucía Program – (C-EXP-265-UGR23)Modeling Nature Research Unit – (QUAL21-011
Traveling gravity-capillary waves with odd viscosity
No full textIn this note, we study the existence of traveling waves of a surface model in a non-newtonian
fluid with odd viscosity. The proof relies on nonlinear bifurcation techniques.MICIU/AEI/10.13039/501100011033, FSE+ - (RYC2023-045563-I, RYC2022-035967-I)MCIN/AEI/10.13039/501100011033/FEDER, UE - (PID2022-140494NA-I00, PID2022-137228OB-I00)Consejería de Universidad, Investigación e Innovación & ERDF/EU Andalusia Program - (C-EXP-265-UGR23)Modeling Nature Research Unit - (QUAL21-011)MCIN/AEI/10.13039/501100011033 - (PID2022-141187NB-I00
Turning plastic and biomass waste into adsorbents: CO2/CH4 separation and comparison with commercial carbons
Full text linkProject PDC2022-133808-I00 (ADSORCHAR) was financed by MICIU/AEI /10.13039/501100011033 and the European Union Next Generation EU/ PRTR. The authors are also grateful to the external analysis services CIC (“Centro de Instrumentación Científica”) of the University of Granada.This work compares two commercial activated carbons (CC1 and CC2) with a novel lab-scale activated carbon (NC) produced from the co-pyrolysis of post-consumer plastic waste and olive cake, followed by physical activation with CO2. The materials were characterized by elemental analysis, proximate analysis, surface area measurements, XRD, and XPS. Elemental and proximate analyses revealed that CC2 possesses the highest carbon content (95.25 %), nitrogen doping (1.62 %), and lowest ash fraction (0.82 %). Textural analysis indicated that CC2 exhibits a high BET surface area (948.55 m2/g) and micropore area (780.84 m2/g), while CC1 showed a negligible surface area (2.82 m2/g), and NC demonstrated a moderate surface area (230.04 m2/g), indicating a poorly developed porous structure in both cases.
Dynamic adsorption tests showed that CC2 presented the highest CO2 uptake (up to 2.90 mmol/g) and CO2/CH4 selectivity (2.40 in molar terms under biogas conditions), mainly attributed to its well-developed microporosity that favor physisorption. In contrast, NC showed lower CO2 adsorption (0.80 mmol/g) and higher CH4 uptake (0.93 mmol/g), resulting in poor selectivity (0.96), suggesting the need for further modification, such as surface functionalization or chemical activation. CC1, limited by its almost non-existent porosity, exhibited intermediate performance with comparable CO2 and CH4 uptakes (0.95 and 0.92 mmol/g, respectively) and modest selectivity (1.04), likely influenced by minor chemisorption on mineral impurities.
Despite its lower CO2 adsorption capacity and selectivity, NC demonstrates high regeneration efficiency, making it suitable for repeated use in gas separation.MICIU/AEI /10.13039/501100011033 and the European Union Next Generation, PDC2022-133808-I00 (ADSORCHAR
Attitudes towards people living with HIV/AIDS through the EAPVVS-E: A descriptive analysis in nursing students
Full text linkAbstract
Background
Despite advances in antiretroviral treatment, stigma towards people with HIV/AIDS continues to exist. Nursing students, as future key players in health care, must advocate for the elimination of stigma through education, empathy and the creation of a supportive environment. This holistic approach is crucial to improving their quality of life and moving towards the eradication of HIV/AIDS.
Aim
To identify nursing students' attitudes towards people living with HIV or AIDS and their relationship with sociodemographic and academic-cultural variables of the participants.
Design
A cross-sectional study was performed.
Settings
The research was carried out in the Nursing Degree of the Faculty of Health Sciences of the Ceuta Campus of the University of Granada.
Participants
Convenience sampling was used to recruit 284 students of the degree in Nursing.
Methods
Data were collected voluntarily and on an anonymous basis, using the “Attitudes Towards People Living with HIV/AIDS Scale in Nursing Students”. Bivariate and multivariate analyses were performed.
Results
Factors 1 (Professional Practice), 2 (Social Integration) and 3 (Partner and Family) exhibited mean scores considered to be favourable attitudes (>4 points). In contrast, Factor 4, called Benevolent Stigma, had a mean score of 3.68 ± 0.97. Religious beliefs, academic year, sexual orientation, academic practices and age are considered influential variables in the different factors.
Conclusions
Nursing students present attitudes with favourable scores. However, these results highlight the importance of influencing the different factors, especially in the second year of the Bachelor's Degree in Nursing in our sample. Thus, an educational intervention in this area would be necessary to reinforce the values of humanised care.Enfermerí
A statistical and modeling study on the effects of radiation on Au/Ta/ ZrO2(Y)/Pt/Ti memristive devices
No full textIn this study we have investigated the impact of the changes induced by ion irradiation on the performance and
reliability of Au/Ta/ZrO2(Y)/Pt/Ti memristive devices. A comprehensive experimental approach was employed,
involving irradiation with various ion species, including H+, Ne+, O+, and Kr+ to simulate different radiation
environments. Thus, advanced statistical and modeling techniques to analyze the effects of irradiation on the
resistive switching (RS) characteristics of the devices have been employed. Results revealed alterations in the
post-irradiation RS parameters, including set and reset voltages and currents. These changes were found to
depend on the ion species and dosage, with heavier ions such as Kr+ causing more pronounced effects. The
findings are supported by detailed Monte Carlo simulations, which provided insights into the distribution of
vacancies within the memristive devices under neutron irradiation. The experimental data, combined with the
modeling results, indicate that RS is generally tolerant to radiation, although ion irradiation can lead to the
formation of defect structures that affect the switching parameters of memristive devices
Fe3C/graphitic carbon xerogels as electrocatalysts for green hydrogen production
No full textHydrogen production via water electrolysis offers a sustainable alternative to fossil fuels, with the hydrogen evolution reaction (HER) serving as a key step. Enhancing the efficiency of this process requires improving the performance and durability of the electrocatalysts involved in HER. This study addresses the limitations of traditional acidic electrolytes which offer high catalytic activity but poor long-term stability by exploring the use of bicarbonate buffer media in combination with iron carbide (Fe3C)-based carbon xerogel catalysts. Three distinct hydrothermal synthesis routes were developed to optimize the catalysts morphology and porosity. Among them, the method involving the delayed addition of NH4OH in a water–ethanol solution (CX-S3) produced the most promising results. This approach yielded a carbon xerogel with high mesoporosity, small, interconnected particles, and a favorable micro–mesoporous structure. These features facilitated improved proton access to the encapsulated Fe3C active sites, resulting in enhanced electrochemical performance. In 0.1 M KHCO3 electrolyte, CX-S3 achieved a stable hydrogen output of 7262.4 ppm at −0.77 V vs. RHE during 8 h of continuous operation. While the catalyst demonstrated faster initial kinetics in acidic conditions, its performance deteriorated at higher current densities due to degradation. In contrast, the bicarbonate buffer provided a more stable environment, enabling sustained hydrogen production and preserving catalyst integrity.MICIU/AEI/10.13039/501100011033 - ERDF - European Union NextGenerationEU/PRTR (Grants PID2021-127803OB-I00 and CNS2023-144680)Andalusia 2021–2027 FEDER Operational Programme (DGF_PLSQ_2023_00183)MCIN/AEI (RYC2020-029301-I)Universidad de Granada / CBU
Understanding the association of intrapancreatic fat deposition with adiposity and components of metabolic syndrome in children and adolescents: a systematic review and meta-analysis
No full text“Plan de Promoción de Grupos de investigación”, Public University of Navarre.Background: Intrapancreatic fat deposition is associated with increased cardiovascular risk in adults, but the association is less clear in children. Our goal in this work was therefore to conduct a systematic review and meta-analysis of the associations between intrapancreatic fat deposition with adiposity and components of metabolic syndrome in children and adolescents.
Methods: Systematic searches were conducted in MEDLINE, Web of Science, and Scopus from database inception to January 11, 2025 (registration number: CRD42022374159). Random-effects meta-analysis was performed to obtain pooled correlations estimates of the association of intrapancreatic fat deposition with various adiposity related outcomes (i.e., overall/central adiposity and specific fat depots; primary outcome) and cardiometabolic risk factors (i.e., glycaemic traits, insulin resistance/sensitivity, insulin secretion surrogates, plasma lipids, and blood pressure; secondary outcomes). Risk of bias and the quality of evidence were evaluated.
Findings: We identified a total of 252 studies, of which 15 unique studies (N = 1261 participants, mean age ranged 10.6–17.7 years, 44.4% females) were eligible for meta-analysis. Magnetic resonance imaging-measured intrapancreatic fat deposition showed a small to medium positive significant association with adiposity (n = 53 studies, r = 0.24 [95% CI:0.19; 0.29], I2 = 61.5%), impaired glycaemic traits and insulin sensitivity (n = 11 studies, r = 0.15 [95% CI:0.03; 0.26], I2 = 58.9%), and HDL levels (n = 7 studies, pooled r = 0.11 [95% CI: 0.01; 0.20], I2 = 0%), and increased blood pressure (n = 6 studies, pooled r = 0.15 [95% CI: 0.05; 0.25], I2 = 0%).
Interpretation: Intrapancreatic fat deposition may increase the risk of cardiometabolic disturbances in children. Therefore, it requires more attention in clinical research as an early indicator of ectopic fat deposition, insulin resistance and metabolic syndrome. Longitudinal studies are necessary to understand the temporal dynamics of these associations and to determine the long-term impact of intrapancreatic fat deposition on the risk of developing type 2 diabetes and cardiovascular diseases.Universidad Pública de Navarr
The Muslim Reply: Jihād and Resistance
No full textA study of jihad ideology and Islamic resistance to the Christian advance during the Andalusi Taifa periodThese results are part of the grant RYC2023-044101-I, funded by MCIN/AEI/10.13039 /501100011033 and FSE+
Antonio Gramsci, Manuel Sacristán and the Struggle against Cultural Exploitation
No full textIn questo articolo esploro il legame tra l’idea di filosofo democratico e il concetto di sfruttamento culturale
nel pensiero di Gramsci. Nel farlo, mi rifaccio alle difficoltà e ai contributi alla ricezione della sua filosofia
dimostrati da Manuel Sacristán, che ha dedicato importanti opere al pensatore sardo. La pratica gramsciana
della filosofia propone un modello radicalmente praticabile di relazione con la produzione del sapere
filosofico, una pratica che mette in discussione le certezze accademiche.In this article, I explore the connection between the concept of the “democratic philosopher” and the notion of cultural exploitation in Gramsci’s work. To do so, I draw on the shortcomings and contributions to the reception of his philosophy as demonstrated by Manuel Sacristán, an important scholar of the Sardinian thinker. Gramsci’s approach to philosophy offers a radically viable model for the production of philosophical knowledge that challenges academic certainties
CUENTAEDUCASOSTENIBLE. Cuentos para educar en desarrollo sostenible
No full textMemoria final del Proyecto de Innovación Docente "CUENTAEDUCASOSTENIBLE. Cuentos para educar en desarrollo sostenible".
El objetivo de dicho producto es la producción de materiales didácticos que permita a los educadores (en formación inicial o activo, en el ámbito universitario o en etapas previas, en el sistema educativo o el ámbito social) crear cuentos para educar hacia el Desarrollo Sostenible, a la vez que se desarrollan las competencias del profesorado universitario y educadores (tanto en formación inicial como en activo) del proyecto. La metodología de trabajo cooperativa le dará viabilidad. La confluencia de especialistas en diversos ámbitos de conocimiento permitirá el trabajo transdisciplinar, enriqueciendo la visión y formación de todos los miembros mientras se diseñan y crean materiales. De la UGR colaborarán docentes, una bibliotecaria y alumnos; externos a la universidad, varios docentes y otros educadores en activo con experiencia en la creación de cuentos y/o la Educación para el Desarrollo Sostenible (EDS). La necesidad surgió ante la percepción de profesorado universitario que trabajamos dicho recurso en nuestras asignaturas, ya que se domina una de las disciplinas (literatura o desarrollo sostenible), se necesita disponer de un material guía con ejemplos didácticos que aúne las dos áreas para ofrecérselo a nuestro alumnado (profesorado en formación inicial), y formarnos para implementarlos adecuadamente. Los productos serán guías para saber crear y narrar cuentos, e introducir la EDS en los mismos. Se crearán cuentos didácticos, seleccionarán cuentos y elaborarán fichas didácticas de los cuentos para ejemplificar los contenidos de las guías. Para garantizar: 1) materiales de calidad, se realizará una evaluación de los mismos; 2) transferencia de conocimiento y sostenibilidad (productos y proyecto), los productos se utilizarán para formar educadores en formación inicial, la participación de educadores en activo les motivará a utilizarlos y hacerlos conocer en su ámbito, se difundirán los materiales en diversos medios, y se tiene previsto solicitar posteriormente proyectos de innovación docente como continuación del que se presenta.Final report of the Teaching Innovation Project "SUSTAINABLEACCOUNT. Stories to educate in sustainable development." The objective of this product is to produce teaching materials that allow educators (in initial training or active, in the university context or in previous stages, in the educational system or the social sphere) to create stories to educate towards Sustainable Development, while developing the competencies of university teachers and educators (both in initial training and in active work) of the project. The cooperative working methodology will ensure its viability. The convergence of specialists in various fields of knowledge will enable transdisciplinary work, enriching the vision and training of all members while designing and creating materials.
From the UGR, teachers, a librarian, and students will collaborate; from outside the university, several teachers and other experienced educators in the creation of stories and/or Education for Sustainable Development (EDS). The need arose from the perception of university professors who work with this resource in our subjects, as we dominate one of the disciplines (literature or sustainable development) and need to have a guiding material with teaching examples that combine both areas to offer to our students (initial teacher training), and to train ourselves to implement them properly. The products will be guides on how to create and narrate stories, and how to introduce EDS into them. Educational stories will be created, stories will be selected, and teaching sheets for the stories will be developed to exemplify the contents of the guides. To ensure: 1) quality materials, an evaluation of them will be conducted; 2) transfer of knowledge and sustainability (products and project), the products will be used to train educators in initial training, the participation of active educators will motivate them to use them and make them known in their field, the materials will be disseminated through various media, and it is planned to later request teaching innovation projects as a continuation of the one presented