Asymptotic parabolicity for strongly damped wave equations

For $S$ a positive selfadjoint operator on a Hilbert space, $$\frac{d^2u}{dt}(t) + 2 F(S)\frac{du}{dt}(t) + S^2u(t)=0$$ describes a class of wave equations with strong friction or damping if $F$ is a positive Borel function. Under suitable hypotheses, it is shown that $$u(t)=v(t)+ w(t)$$ where $v$ satisfies $$2F(S)\frac{dv}{dt}(t)+ S^2v(t)=0$$ and $$\frac{w(t)}{\|v(t)\|} \rightarrow 0, \; \text{as} \; t \rightarrow +\infty.$$ The required initial condition $v(0)$ is given in a canonical way in terms of $u(0)$, $u'(0)$

Increased intestinal carbonate precipitate abundance in the sea bream (Sparus aurata L.) in response to ocean acidification

Marine fish contribute to the carbon cycle by producing mineralized intestinal precipitates generated as by-products of their osmoregulation. Here we aimed at characterizing the control of epithelial bicarbonate secretion and intestinal precipitate presence in the gilthead sea bream in response to predicted near future increases of environmental CO2. Our results demonstrate that hypercapnia (950 and 1800 μatm CO2) elicits higher intestine epithelial HCO3- secretion ex vivo and a subsequent parallel increase of intestinal precipitate presence in vivo when compared to present values (440 μatm CO2). Intestinal gene expression analysis in response to environmental hypercapnia revealed the up-regulation of transporters involved in the intestinal bicarbonate secretion cascade such as the basolateral sodium bicarbonate co-transporter slc4a4, and the apical anion transporters slc26a3 and slc26a6 of sea bream. In addition, other genes involved in intestinal ion uptake linked to water absorption such as the apical nkcc2 and aquaporin 1b expression, indicating that hypercapnia influences different levels of intestinal physiology. Taken together the current results are consistent with an intestinal physiological response leading to higher bicarbonate secretion in the intestine of the sea bream paralleled by increased luminal carbonate precipitate abundance and the main related transporters in response to ocean acidification.Agência financiadora Fundacao para a Ciencia e a Tecnologia (FCT) SFRH/BD/113363/2015 PTDC/MAR-BIO/3034/2014 Fundacao para a Ciencia e a Tecnologia (FCT) UID/Multi/04326/2019 Ministry of Science and Higher Education, Polandinfo:eu-repo/semantics/publishedVersio

Social Responsibility and international cooperation for development: a communication perspective from Andalusian Universities

El presente trabajo aborda la manera en que las universidades andaluzas están llevando a cabo políticas y acciones de formación, investigación y divulgación en el ámbito de la responsabilidad social y la cooperación internacional al desarrollo.This article addresses how andalusian universities implement educational, research and dissemination policies and actions in the field of social responsibility and international development cooperation

Bem-estar spiritual dos enfermeiros das unidades de terapia intensiva em pandemia

Objective: Determine the spiritual well-being and its relationship with demographic variables of nursing professionals who work at the Intensive Care Unit (ICU) during the COVID-19 pandemic. Materials and methods: Quantitative, cross-sectional study that determined the levels of spiritual well-being through the Reed´s Spiritual Perspective Scale (SPS) in 116 nurses that worked in the ICU during the public health emergency of COVID-19, from June to July of 2020. The relationship of the variables was determined using the Fisher test, and the differences between the groups using the Mann-Whitney U test and the Analysis of Variance (ANOVA) test. Significant statistical differences, with p<0,05, were considered. Results: The participants were predominantly female, under 45 years of age, single and with a bachelor´s degree as their maximum level of education. High levels of practice, belief and spiritual well-being were observed regardless the public health situation. Conclusion: The spiritual perspective behaves differently depending on the age, gender, civil status, academic background, and income. A high well-being in the nursing professional who works at the ICU during the COVID-19 pandemic, is a strength that could help maintain their mental health, improving their capacity to respond to scenarios of crisis.Objetivo: Determinar el bienestar espiritual y su relación con variables demográficas y profesionales en enfermeros que se desempeñan en Unidades de Cuidado Intensivo (UCI) durante la pandemia del COVID-19. Materiales y métodos: Estudio cuantitativo, transversal que determinó los niveles de bienestar espiritual mediante la escala de perspectiva espiritual (SPS) de Pamela Reed, en 116 enfermeros que actúan en UCI durante la emergencia sanitaria del COVID-19 de junio a julio de 2020. La relación de las variables se determinó empleando el test de Fisher y las diferencias entre los grupos usando Mann-Withney y ANOVA. Fueron consideradas diferencias estadísticas significativas con p<0,05. Resultados: Los participantes fueron predominantemente del sexo femenino, con edades inferiores a 45 años, estado civil soltero y con pregrado como máximo nivel de formación. Se observaron altos niveles de práctica, creencia y bienestar espiritual independiente de la situación de salud pública. Conclusión: La perspectiva espiritual se comporta de manera diferenciada según la edad, género, estado civil, formación académica e ingresos económicos. El alto bienestar espiritual en el enfermero que labora en UCI durante la pandemia del COVID-19, es una fortaleza que puede apoyar el mantenimiento de su salud mental, mejorando su capacidad de respuesta en escenarios de crisis.Objetivo: Determinar o bem-estar espiritual e a sua relação com as variáveis demográficas e profissionais dos enfermeiros que atuam nas Unidades de Terapia Intensiva (UTI) durante a pandemia da COVID-19. Materiais e métodos: Estudo quantitativo, transversal que determinou o bem-estar espiritual usando a escala de perspectiva espiritual (SPS) de Pamela Reed, em 116 enfermeiros que atuam em UTI durante a emergência sanitária da COVID-19 de junho a julho de 2020. A relação das variáveis estabeleceu-se com o teste de Fisher e as diferenças entre os grupos usando Mann-Whitney e ANOVA. Consideraram-se diferenças estatísticas significantes com p<0.05. Resultados: Os participantes foram predominantemente do sexo feminino, com idade inferior aos 45 anos, solteiros e com a graduação como máximo nível de formação. Observaram-se altos níveis de prática crença e bem-estar espiritual, independente da situação de saúde pública. Conclusão: A perspectiva espiritual comporta-se de maneira diferenciada segundo a idade, sexo, estado civil, formação acadêmica e ingressos financeiros. O alto bem-estar espiritual no enfermeiro que trabalha na UTI durante a pandemia da COVID-19, é uma fortaleza que pode apoiar lhe na manutenção da sua saúde mental e melhorar a sua capacidade de afrontamento em cenários de crise