Dual-Band Antenna/AMC Combination for RFID

A novel antenna/Artificial Magnetic Conductor (AMC) combination usable in dual-band Radio Frequency Identification (RFID) tags over metallic objects is presented. A compact and low thickness prototype is manufactured and characterized in terms of return loss and radiation properties in an anechoic chamber both alone and on a metallic plate. The performance exhibited by the presented antenna/AMC prototype is proper for RFID tags on both metallic and nonmetallic objects

The Spanish public pension system : current situation, challenges and reform alternatives

El déficit del Sistema de la Seguridad Social español alcanzó un 1,5 % del PIB en 2015, que contrasta con el superávit observado antes de la crisis económica, del 2,2 % del PIB en 2007. Este deterioro se debe, sobre todo, a un incremento del gasto en pensiones contributivas (en % del PIB), como resultado del incremento de la tasa de dependencia, el aumento de la tasa de sustitución de las pensiones y la caída de la tasa de empleo. Más allá de esta situación de corto plazo, el sistema público de pensiones español se enfrenta, como los del resto de los países desarrollados, a retos importantes causados por la expectativa de un aumento significativo de la longevidad y, consecuentemente, de la proporción de la población en edad de jubilación. En este contexto, este documento tiene como objetivo contribuir al debate sobre la situación del sistema de pensiones mediante el análisis de su evolución reciente, las previsiones hacia el futuro, que incorporan el impacto de las últimas reformas, y los retos pendientesThe Spanish Social Security System’s deficit rose to 1.5% of GDP in 2015, in contrast to a pre-crisis surplus of 2.2% of GDP in 2007. This deterioration is primarily due to an increase in contributory pension spending (as a % of GDP), as a result of the rise in the dependency ratio, the increase in the pension replacement rate and the decline in the employment rate. Beyond this short-term situation, the Spanish public pension system, as is the case in other developed countries, faces major challenges arising from expectations of significant longevity gains and the attendant growth of the retirement-age population. In this context, this paper aims to contribute to the debate on the situation of the pension system through an analysis of its recent evolution, forward-looking projections that include the impact of the latest reforms and the challenges outstandin

Fiscal policy, structural reforms and external imbalances : a quantitative evaluation for Spain

Este artículo considera un modelo de generaciones solapadas, aplicado a una economía pequeña, abierta al comercio internacional y caracterizada por la existencia de competencia imperfecta en los mercados de bienes y de trabajo, para analizar: i) cuáles fueron los principales determinantes de la expansión observada en la economía española desde mediados de los 1990s hasta la llegada de la crisis financiera global en 2007-2008, ii) qué papel podrían haber jugado la política fiscal y las reformas estructurales en la reducción del desequilibrio externo acumulado durante este periodo, y iii) cómo estas políticas podrían influir en el proceso de recuperación de la actividad económica en España después de la crisis. Los resultados apuntan a que la caída en los tipos de interés y los cambios demográficos fueron los principales factores que impulsaron la última etapa expansiva en España. En cuanto al comportamiento macroeconómico de la economía española después de la crisis, los resultados sugieren que un adelanto en el proceso de consolidación fiscal, junto con la introducción de reformas estructurales que reduzcan las distorsiones existentes en los mercados de bienes y de trabajo, contribuirían a que la recuperación de la actividad fuera más exitos

Report from the CVOT Summit 2020: new cardiovascular and renal outcomes

The 6th Cardiovascular Outcome Trial (CVOT) Summit “Cardiovascular and Renal Outcomes 2020” was the first to be held virtually on October 29–30, 2020. As in previous years, this summit served as reference meeting for in-depth discussions on the topic of recently completed and presented major outcome trials. This year, focus was placed on the outcomes of VERTIS-CV, EMPEROR-Reduced, DAPA-CKD, and FIDELIO-DKD. Trial implications for diabetes management and the impact on new treatment algorithms were highlighted for diabetologists, cardiologists, endocrinologists, nephrologists, and general practitioners. Discussion evolved from major outcome trials using SGLT-2 inhibitors for treatment and prevention of heart failure and chronic kidney disease in people with and without diabetes, to additional therapy options for chronic kidney disease with a novel mineralocorticoid receptor antagonist. Furthermore, challenges in diabetes management like COVID-19 and obesity, as well as novel treatment strategies and guidelines, were discussed. The 7th Cardiovascular Outcome Trial Summit will be held virtually on November, 18–19, 2021 (http://www.cvot.org)

CARMENES input catalogue of M dwarfs IV. New rotation periods from photometric time series

Aims. The main goal of this work is to measure rotation periods of the M-type dwarf stars being observed by the CARMENES exoplanet survey to help distinguish radial-velocity signals produced by magnetic activity from those produced by exoplanets. Rotation periods are also fundamental for a detailed study of the relation between activity and rotation in late-type stars. Methods. We look for significant periodic signals in 622 photometric time series of 337 bright, nearby M dwarfs obtained by long-time baseline, automated surveys (MEarth, ASAS, SuperWASP, NSVS, Catalina, ASAS-SN, K2, and HATNet) and for 20 stars which we obtained with four 0.2-0.8 m telescopes at high geographical latitudes. Results. We present 142 rotation periods (73 new) from 0.12 d to 133 d and ten long-term activity cycles (six new) from 3.0 a to 11.5 a. We compare our determinations with those in the existing literature; we investigate the distribution of P rot in the CARMENES input catalogue,the amplitude of photometric variability, and their relation to vsin i and pEW(Halfa); and we identify three very active stars with new rotation periods between 0.34 d and 23.6 d.Comment: 34 pages, 43 figures, 2 appendix table

Inhibitory effects of pharmacological doses of melatonin on aromatase activity and expression in rat glioma cells

Melatonin exerts oncostatic effects on different kinds of neoplasias, especially on oestrogen-dependent tumours. Recently, it has been described that melatonin, on the basis of its antioxidant properties, inhibits the growth of glioma cells. Glioma cells express oestrogen receptors and have the ability to synthesise oestrogens from androgens. In the present study, we demonstrate that pharmacological concentrations of melatonin decreases the growth of C6 glioma cells and reduces the local biosynthesis of oestrogens, through the inhibition of aromatase, the enzyme that catalyses the conversion of androgens into oestrogens. These results are supported by three types of evidence. Firstly, melatonin counteracts the growth stimulatory effects of testosterone on glioma cells, which is dependent on the local synthesis of oestrogens from testosterone. Secondly, we found that melatonin reduces the aromatase activity of C6 cells, measured by the tritiated water release assay. Finally, by (RT)–PCR, we found that melatonin downregulates aromatase mRNA steady-state levels in these glioma cells. We conclude that melatonin inhibits the local production of oestrogens decreasing aromatase activity and expression. By analogy to the implications of aromatase in other forms of oestrogen-sensitive tumours, it is conceivable that the modulation of the aromatase by pharmacological melatonin may play a role in the growth of glioblastomas

El sistema público de pensiones en España : situación actual, retos y alternativas de reforma

El déficit del Sistema de la Seguridad Social español alcanzó un 1,5 % del PIB en 2015, que contrasta con el superávit observado antes de la crisis económica, del 2,2 % del PIB en 2007. Este deterioro se debe, sobre todo, a un incremento del gasto en pensiones contributivas (en % del PIB), como resultado del incremento de la tasa de dependencia, el aumento de la tasa de sustitución de las pensiones y la caída de la tasa de empleo. Más allá de esta situación de corto plazo, el sistema público de pensiones español se enfrenta, como los del resto de los países desarrollados, a retos importantes causados por la expectativa de un aumento significativo de la longevidad y, consecuentemente, de la proporción de la población en edad de jubilación. En este contexto, este documento tiene como objetivo contribuir al debate sobre la situación del sistema de pensiones mediante el análisis de su evolución reciente, las previsiones hacia el futuro, que incorporan el impacto de las últimas reformas, y los retos pendientesThe Spanish Social Security System’s deficit rose to 1.5% of GDP in 2015, in contrast to a pre-crisis surplus of 2.2% of GDP in 2007. This deterioration is primarily due to an increase in contributory pension spending (as a % of GDP), as a result of the rise in the dependency ratio, the increase in the pension replacement rate and the decline in the employment rate. Beyond this short-term situation, the Spanish public pension system, as is the case in other developed countries, faces major challenges arising from expectations of significant longevity gains and the attendant growth of the retirement-age population. In this context, this paper aims to contribute to the debate on the situation of the pension system through an analysis of its recent evolution, forward-looking projections that include the impact of the latest reforms and the challenges outstandin