University of Valencia
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L'heterodòxia de Maria Antònia Ortolà. El camí de l'escriptura autobiogràfica al procés inquisitorial (1717-1727)
No full textL'heterodòxia de Maria Antònia Ortolà. El camí de l'escriptura autobiogràfica al procés inquisitorial (1717-1727
A High-Capacity Negative Electrode for Asymmetric Supercapacitors Based on a PMo12 Coordination Polymer with Novel Water-Assisted Proton Channels
No full textThe development of a negative electrode for supercapacitors is a critical challenge for the next-generation of energy-storage devices. Herein, two new electrodes formed by the coordination polymers [Ni(itmb)4(HPMo12O40)]·2H2O (1) and [Zn(itmb)3(H2O)(HPMo12O40)]·4H2O (2) (itmb = 1-(imidazo-1-ly)-4-(1,2,4-triazol-1-ylmethyl)benzene), synthesized by a simple hydrothermal method, are described. Compounds 1 and 2 show high capacitances of 477.9 and 890.2 F g−1, respectively. An asymmetric supercapacitor device assembled using 2 which has novel water-assisted proton channels as negative electrode and active carbon as positive electrode shows ultrahigh energy density and power density of 23.4 W h kg−1 and 3864.4 W kg−1, respectively. Moreover, the ability to feed a red light emitting diode (LED) also demonstrates the feasibility for practical use. The results allow a better elucidation of the storage mechanism in polyoxometalate-based coordination polymers and provide a promising direction for exploring novel negative materials for new-generation high-performance supercapacitors
Los hilos invisibles de la historia: explorando la dinámica de las sociedades antiguas a través del Análisis de Redes Sociales
No full textImagine el mundo antiguo como un vibrante tapiz tejido con innumerables hilos de relaciones entre artefactos, personas y comunidades. El Análisis de Redes Sociales (ARS) ofrece una lente a través de la cual podemos explorar estas intrincadas conexiones, transformando los registros arqueológicos estáticos en narrativas de interacción humana. Este artículo se adentra en la aplicación del ARS en la Arqueología, destacando cómo este método nos permite mapear las redes ocultas que moldearon las sociedades del pasado. Al emplear técnicas avanzadas de análisis de datos y visualización, el ARS proporciona poderosos métodos para descubrir la compleja red de interacciones que influyeron en el desarrollo y la transformación de las comunidades antiguas. El artículo no solo introduce los fundamentos teóricos del ARS, sino que también muestra sus aplicaciones prácticas, presentando un caso convincente de su potencial para revolucionar la investigación arqueológica. A través de esta herramienta, obtenemos nuevas perspectivas sobre la difusión de artefactos, ideas y prácticas culturales, enriqueciendo en última instancia nuestra comprensión de la historia humana
El Emprendedor Social: Análisis de la Alerta Social
No full textLos emprendedores sociales están ganando cierto reconocimiento como uno de los agentes de cambio social más importantes. Aun así poco se conoce sobre sus motivaciones y el proceso a través del cual sus ideas se conciben y desarrollan. En este trabajo se analiza el proceso de descubrimiento de oportunidades en el caso de los emprendedores sociales, partiendo de la teoría del descubrimiento y del concepto de alerta emprendedora que, en este caso, rebautizamos como alerta social. Para ello se estudia el papel de la formación y experiencia previa del emprendedor, la cercanía a otros emprendedores y la cercanía al problema social como variables relacionadas con la alerta social. Dada la novedad de la temática abordada y el carácter exploratorio de la investigación realizada hemos utilizado una metodología cualitativa, concretamente en estudio de casos en profundidad, cuyos resultados nos han llevado a proponer un modelo de relaciones entre las variables analizadas
Future directions in international financial integration research - A crowdsourced perspective
No full textThis paper is the result of a crowdsourced effort to surface perspectives on the present and future direction of international finance. The authors are researchers in financial economics who attended the INFINITI 2017 conference in the University of Valencia in June 2017 and who participated in the crowdsourcing via the Overleaf platform. This paper highlights the actual state of scientific knowledge in a multitude of fields in finance and proposes different directions for future research
Marine Insurance Institute Cargo Clauses 2009 (A) - Cláusulas 2009 'todo riesgo' (A) de la Asociación Internacional de Aseguradores de Londres
No full textTraducción al español de las Cláusulas 2009 (A) de la Asociación Internacional de Aseguradores de Londres
Minimization of Carrier Losses for Efficient Perovskite Solar Cells through Structural Modification of Triphenylamine Derivatives
No full textThree hole transport materials (HTMs) based on a substituted triphenylamine moiety have been synthesized and successfully employed in triple-cation mixed-halide PSCs, reaching efficiencies of 19.4%. The efficiencies, comparable to those obtained using spiro-OMeTAD, point them out as promising candidates for easily attainable and cost-effective alternatives for PSCs, given their facile synthesis from commercially available materials. Interestingly, although all these HTMs show similar chemical and physical properties, they provide different carrier recombination kinetics. Our results demonstrate that is feasible through the molecular design of the HTM to minimize carrier losses and, thus, increase the solar cell efficiencies
Activation of α1A -adrenoceptors desensitizes the rat aorta response to phenylephrine through a neuronal NOS pathway, a mechanism lost with ageing
No full textBackground and purpose: A NO-mediated desensitization of vasoconstrictor responses evoked by stimulation of α1 -adrenoceptors has been reported in different vessels. We investigated the involvement of each α1 -adrenoceptor subtype and constitutive NOS isoforms and the influence of ageing and hypertension on this process. Experimental approach: Wistar and spontaneously hypertensive rats (SHR), 16, 32, 52 and 72 weeks-old, were used to evaluate the desensitization process. Expression of α1 -adrenoceptor subtypes, endothelial NOS (eNOS) and neuronal NOS (nNOS) were determined in rat aorta and left ventricle (LV). Expression levels were also evaluated in LV of a group of heart failure patients with a wide age range. Key results: Repeated application of phenylephrine decreased subsequent α1 -adrenoceptor-mediated vasoconstriction by increasing nNOS protein expression in aorta, but not in tail or mesenteric resistance arteries, where mRNA levels of nNOS were undetectable. This desensitization process disappeared in the absence of endothelium or in the presence of L-NAME (100 μM), nNOS inhibitors, SMTC (1 μM) and TRIM (100 μM), and 5-methylurapidil (100 nM, α1A -antagonist), but not BMY7378 (10 nM, α1D -antagonist). The α1A /nNOS-mediated desensitization was absent in aged SHR and Wistar animals, where the expression of α1A -adrenoceptors was reduced in aorta and LV. In human LV, a negative correlation was found between age and α1A -adrenoceptor expression. Conclusions and implications: The α1A -adrenoceptor subtype, through endothelial nNOS-derived NO, may act as a physiological 'brake' against the detrimental effects of excessive α1 -adrenoceptor-mediated vasoconstriction. Reduced α1A -adrenoceptor- and nNOS-mediated desensitization in aged patients could be involved in the age-dependent elevation of adrenergic activity
Which estimator to measure local governments´ cost efficiency? The case of Spanish municipalities
No full textWe analyse overall cost efficiency in Spanish local governments during the crisis period (2008-2015). To this end, we first consider some of the most popular nonparametric methods to evaluate local government efficiency, data envelopment analysis and free disposal hull, as well as recent proposals, namely the order-m partial frontier and the nonparametric estimator proposed by Kneip et al. (Econom Theory 24(6):1663-1697, 2008). Second, to compare the four methods and choose the most appropriate one for our particular context and dataset (local government cost efficiency in Spain), we carry out an experiment via Monte Carlo simulations and discuss the relative performance of the efficiency scores under various scenarios. Our results suggest that there is no one approach suitable for all efficiency analysis. We find that for our sample of 1846 Spanish local governments, the average cost efficiency would have been between 0.5417 and 0.7543 during the period 2008-2015, suggesting that Spanish local governments could have achieved the same level of local outputs with about 25% and 46% fewer resources
Fuelling climate change disinformation: Global narratives distorting environmental risks in North America, Europe and Latin America
No full textThe production and dissemination of disinformation is a global phenomenon in relation to sensitive issues such as climate change. This article analyses the activity (n = 419) of nine independent platforms debunking disinformation in North America, Europe and Latin America. Findings show that most fact-checking results were false or misleading (86.4%). Four main conclusions are drawn. Firstly, regardless of language, geographical or cultural differences, there is a consistent presence of manipulated content across countries, confirming the worrying levels of disinformation on climate change. Secondly, three central narratives for spreading disinformation have been identified: denial of scientific evidence, distortion of science and attribution of ulterior motives to action on climate change, often linked to conspiracy theories. Although there are differences in terms of representation, these narratives are prevalent in the three regions. Thirdly, these narratives revolve around topics such as meteorology, natural phenomena and temperature or the distortion of evidence about the effects of climate change. Finally, social media (52.5%) and websites and pseudo-media (25.8%) are the main sources of climate change disinformation