IntroductionThe media portrayal of mental health is relevant in shaping the population’s attitudes towards mental disorders. However, there is little information about the representation of children ...and adolescent mental health in the Spanish press, especially in the context of the COVID-19 pandemic. The general objective of this study was to analyze the tone and content of Spanish newspaper articles about mental disorders in youth during the COVID-19 pandemic.MethodWe collected media articles from 10 news sources, comprising the digital editions of five online news websites and five printed newspapers over a 6 month period (January 2021-June 2021). These articles were coded for content using a standardized codebook, followed by a qualitative thematic analysis. A total of 205 news items were evaluated.ResultsResults showed that the majority of the news items had an overall positive tone (68.3%), only 5.4% were stigmatizing and only 7.3% were related to violence. However, few articles offered help seeking information (6%), adolescents were rarely quoted (14%) and children were never quoted. Substantial differences are described in terms of age, gender and disorder, with adolescents, males and patients with psychosis or behavioral disorders most associated with stigmatizing content or violence. The thematic analysis led to three emergent themes: (i) violence and victimization; (ii) the COVID-19 pandemic; and (iii) technology and social media. The number of articles that described young people with mental health problems as victims of violence was prominent.ConclusionsThe Spanish media generally does not stigmatize mental health problems in children and adolescents. Furthermore, the COVID-19 pandemic may have promoted more positive discussion about youth mental health. However, there remains some room for improvement, as patients are seldom quoted, very few articles offer help-seeking information, and a narrative of victimization without appropriate discussion of resilience regularly occurs.Disclosure of InterestNone Declared
In the last few years, restrictive grid codes have arisen to ensure the performance and stability of electrical networks, which experience a massive integration of renewable energy sources and ...distributed generation systems that are normally connected to the grid through electronic power converters. In these codes, the injection of positive- and negative-sequence current components becomes necessary for fulfilling, among others, the low-voltage ride-through requirements during balanced and unbalanced grid faults. However, the performance of classical dq current controllers, applied to power converters, under unbalanced grid-voltage conditions is highly deficient, due to the unavoidable appearance of current oscillations. This paper analyzes the performance of the double synchronous reference frame controller and improves its structure by adding a decoupling network for estimating and compensating the undesirable current oscillations. Experimental results will demonstrate the validity of the proposed decoupled DSRF controller.
The aim of this study is to develop a process to produce high-performance cement-based composites reinforced with flax nonwoven fabrics, analyzing the influence of the fabric structure-thickness and ...entanglement-on mechanical behavior under flexural and tensile loadings. For this purpose, composite with flax nonwoven fabrics with different thicknesses were first prepared and their cement infiltration was evaluated with backscattered electron (BSE) images. The nonwoven fabrics with the optimized thickness were then subjected to a water treatment to improve their stability to humid environments and the fiber-matrix adhesion. For a fixed thickness, the effect of the nonwoven entanglement on the mechanical behavior was evaluated under flexural and direct tension tests. The obtained results indicate that the flax nonwoven fabric reinforcement leads to cement composites with substantial enhancement of ductility.
Context.
The Sagittarius (Sgr) stream is one of the best tools that we currently have to estimate the mass and shape of our Galaxy. However, assigning membership and obtaining the phase-space ...distribution of the stars that form the tails of the stream is quite challenging.
Aims.
Our goal is to produce a catalogue of the RR Lyrae stars of Sgr and obtain an empiric measurement of the trends along the stream in sky position, distance, and tangential velocity.
Methods.
We generated two initial samples from the
Gaia
DR2 RR Lyrae catalogue: one selecting only the stars within ±20° of the orbital plane of Sagittarius (Strip), and the other resulting from application of the Pole Count Map (nGC3) algorithm. We then used the model-independent, deterministic method developed in this work to remove most of the contamination by detecting and isolating the stream in distance and proper motions.
Results.
The output is two empiric catalogues: the Strip sample (higher-completeness, lower-purity) which contains 11 677 stars, and the nGC3 sample (higher-purity, lower-completeness) with 6608 stars. We characterise the changes along the stream in all the available dimensions, namely the five astrometric dimensions plus the metallicity, covering more than 2
π
rad in the sky, and obtain new estimates for the apocentres and the mean Fe/H of the RR Lyrae population. Also, we show the first map of the two components of the tangential velocity thanks to the combination of distances and proper motions. Finally, we detect the bifurcation in the leading arm and report no significant difference between the two branches in terms of metallicity, kinematics, or distance.
Conclusions.
We provide the largest sample of RR Lyrae candidates of Sgr, which can be used as input for a spectroscopic follow-up or as a reference for the new generation of models of the stream through the interpolators in distance and velocity that we constructed.
A hierarchical porous carbon prepared via direct carbonization of Ni-MOF-74 loaded with furfuryl alcohol at 450 °C displays high specific capacitance in comparison with other MOF-derived carbons as a ...result of the formation of micropores smaller than 1 nm.
► Ultrasound/conventionally blanched carrots had similar sensory quality after drying. ► The pattern of vitamin C losses is mainly attributed to different blanching conditions. ► ChemSensor allowed ...differentiation of samples with similar composition/processing.
Vitamin C content and sensorial properties have been evaluated in air-dried carrots previously subjected to different ultrasound (US) or conventional blanching pretreatments. In addition, mass spectral fingerprints obtained by the Headspace ChemSensor System have been evaluated for the first time for classification of carrots according to their processing. Conventional blanching treatments at high temperature gave rise to carrots with retention of vitamin C in the range 37.5–85%, whereas carrots blanched conventionally at 60°C and by US-probe at temperatures up to 60 and 70°C showed vitamin C retention values lower than 4%. Regarding sensorial analysis of rehydrated carrots, US-pretreated samples presented acceptable quality, and no statistically significant differences with respect to conventionally blanched carrots, were detected. In spite of this, differentiation of samples processed under comparable intensity conditions and/or with similar composition was possible from their mass spectral fingerprints after chemometric data analysis.
This book develops the challenges that history teaching must face as a curricular subject at the beginning of the 21st century. These challenges are related, both to new epistemological approaches in ...history education, and also to the development of new activities, active-learning methodologies, and historical thinking competencies. In terms of new approaches, this book suggests activities regarding invisible topics such as social and economic impacts in history, inequalities, church and science, gender equality, power and violence, prosecuted by justice, peasantry and the urban world, family and daily life, terror or travelers and their cross-currents. Regarding the activities, the incidence of new technologies in social relations and the effects of globalization is very remarkable for our students. The authors highlight the need for changes in teaching and learning history.
A
bstract
= 4 Poincaré supergravity has a global SU(1, 1) duality symmetry that acts manifestly only on shell as it involves duality rotations of vector fields. A U(1) subgroup of this symmetry is ...known to be anomalous at the quantum level in the presence of a non-trivial gravitational background. We first derive this anomaly from a novel perspective, by relating it to a similar anomaly in conformal supergravity where SU(1, 1) acts off shell, using the fact that
= 4 Poincaré supergravity has a superconformal formulation. We explicitly construct the corresponding local and nonlocal anomalous terms in the one-loop effective action. We then study how this anomaly is reflected in the supergravity S-matrix. Calculating one-loop
= 4 supergravity scattering amplitudes (with and without additional matter multiplets) using color/kinematics duality and the double-copy construction we find that a particular U(1) symmetry which was present in the tree-level amplitudes is broken at the quantum level. This breaking manifests itself in the appearance of new one-loop
= 4 supergravity amplitudes that have non-vanishing soft-scalar limits (these amplitudes are absent in
> 4 supergravities). We discuss the relation between these symmetry-violating amplitudes and the corresponding U(1) anomalous term in the one-loop supergravity effective action.
Abstract
Lipid Nanoparticles (LNPs) are used to deliver siRNA and COVID-19 mRNA vaccines. The main factor known to determine their delivery efficiency is the pKa of the LNP containing an ionizable ...lipid. Herein, we report a method that can predict the LNP pKa from the structure of the ionizable lipid. We used theoretical, NMR, fluorescent-dye binding, and electrophoretic mobility methods to comprehensively measure protonation of both the ionizable lipid and the formulated LNP. The pKa of the ionizable lipid was 2-3 units higher than the pKa of the LNP primarily due to proton solvation energy differences between the LNP and aqueous medium. We exploited these results to explain a wide range of delivery efficiencies in vitro and in vivo for intramuscular (IM) and intravascular (IV) administration of different ionizable lipids at escalating ionizable lipid-to-mRNA ratios in the LNP. In addition, we determined that more negatively charged LNPs exhibit higher off-target systemic expression of mRNA in the liver following IM administration. This undesirable systemic off-target expression of mRNA-LNP vaccines could be minimized through appropriate design of the ionizable lipid and LNP.
•A supervised filter feature selection method for mixed data is introduced•Spectral analysis and Information-theory based feature selection was applied•Relevant and non-redundant features are ...selected•An evaluation of the proposed method on 40 public datasets was performed•A comprehensive comparison against state-of-the-art methods was made
Spectral analysis and Information-theory are two powerful and successful frameworks for feature selection in supervised classification problems. However, most of the methods developed under these frameworks have been introduced for handling exclusively numerical or non- numerical data. In this paper, we propose a supervised filter feature selection method that combines Spectral Feature Selection and Information-theory based redundancy analysis for selecting relevant and non-redundant features in supervised mixed datasets; i.e., datasets where the objects are described simultaneously by both, numerical and non-numerical features. To demonstrate the effectiveness of our proposed supervised filter feature selection method, we conducted several experiments on 40 public real-world datasets. Additionally, we compare our method against relevant state-of-the-art supervised filter methods for numerical, non-numerical, and mixed data. From this comparison, our method, in general, obtains better results than the results obtained by the other evaluated filter feature selection methods.
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