216 research outputs found

    Arab Mediterranean youth: Political and religious participation

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    © CIDOB (Barcelona Centre for International Affairs). Using data from the SAHWA Youth Survey 2016 (2017), this paper presents a study of the degree and types of political and religious participation - as well as the links that connect one to the other - among the youth of five Arab Mediterranean countries (Morocco, Algeria, Tunisia, Egypt and Lebanon). In politics, four types of participation are distinguished: official, everyday, community and protest. Between 5% and 17% of those surveyed could be considered hyperactivists, in that they participate in three or four of these types; in around a third, there was no participation at all. On the other hand, the majority of the young people considered themselves to be highly religious and, in three of the countries, a third attended the mosque at least three times a week. But the levels of religiosity did not influence political participation, as even the majority of the highly religious supported separating politics from religion

    Superconducting BSCCO Ceramics as Additive to the Zinc Electrode Mass in the Rechargeable Nickel-Zinc Batteries

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    The electronic conductivity of the main component of the zinc electrode in the rechargeable zinc-nickel battery – ZnO,  is rather poor and this is the main reason for the electrochemical heterogeneity of the anode mass and the loss of active surface area during charge/discharge cycling with a corresponding negative effect on the electrode characteristics In the present work, the possibility of application of superconductive cuprate Bi-Pb-Sr-Ca-Cu-O (BSCCO) ceramic as a multifunctional conductive additive to the zinc electrode mass is studied. Powder samples of the BSCCO ceramic Bi1,7Pb0,3Sr2Ca2Cu3Ox are produced by two-stage solid-state synthesis and they are physicochemically characterized. The XRD patterns and SEM observation reveal a well crystallized single phase of superconducting 2212 BSCCO system with average crystallite size 5-10 µm. The chemical stability of BSCCO ceramics in highly alkaline medium of the Ni-Zn battery is confirmed by structural and morphological analysis (XRD, SEM and EDX) of the samples before and after prolong exposure (96 h) to 7M KOH. The electrochemical tests are carried out by a specially designed prismatic alkaline Ni-Zn battery cell with conventional sintered type nickel electrodes and pasted zinc electrode with active electrode mass based on ZnO (88 wt.%) and addition of BSCCO powder or acetylene black as conductive additives. The study show that the zinc electrode with BSCCO superconducting ceramic additive exhibits very good cycleability, remarkable capacity stability and much higher discharge capacity at prolong charge/discharge cycling in comparison to the  zinc electrode with the “classic” carbon conductive additive. It is suggested that the addition of BSCCO ceramics improves not only conductivity of the electrode mass and reduces the gas evolution but also stabilizes porosity structure. The results obtained prove the possibility of application of superconducting BSCCO ceramics as a multifunctional additive to the active mass of the zinc electrodes for alkaline battery systems

    Effects of local activation times on the tension development of human cardiomyocytes in a computational model

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    The human heart is an organ of high complexity and hence, very challenging to simulate. To calculate the force developed by the human heart and therefore the tension of the muscle fibers, accurate models are necessary. The force generated by the cardiac muscle has physiologically imposed limits and depends on various characteristics such as the length, strain and the contraction velocity of the cardiomyocytes. Another characteristic is the activation time of each cardiomyocyte, which is a wave and not a static value for all cardiomyocytes. To simulate a physiologically correct excitation, the functionality of the cardiac simulation framework CardioMechanics was extended to incorporate inhomogeneous activation times. The functionality was then used to evaluate the effects of local activation times with two different tension models. The active stress generated by the cardiomyocytes was calculated by (i) an explicit function and (ii) an ode-based model. The results of the simulations showed that the maximum pressure in the left ventricle dropped by 2.3% for the DoubleHill model and by 5.3% for the Lumens model. In the right ventricle the simulations showed similar results. The maximum pressure in both the left and the right atrium increased using both models. Given that the simulation of the inhomogeneously activated cardiomyocytes increases the simulation time when used with the more precise Lumens model, the small drop in maximum pressure seems to be negligible in favor of a simpler simulation model

    Perinatal depression in the Spanish context: consensus report from the general council of psychology of Spain

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    Background: Perinatal depression is a major public health problem, with an estimated prevalence of approximately 15% during the first postpartum year. Despite the high prevalence of postpartum depression, there is no consensus regarding assessment and treatment in the Spanish context. The General Council of Psychology of Spain convened a working group of experts in the field, including both academics and healthcare professionals, to review and propose recommendations based on evidence and best practices that could be applied in the Spanish context. Method: A literature search was completed in various databases (e.g., Medline, PsychInfo) including a combination of terms related to peripartum depression (PPD) assessment and diagnosis, prevention, treatment, and cost-effectiveness. A narrative synthesis of the literature has been conducted together with a critical overview of PPD with a special focus on the Spanish context. Results: In this consensus report, developing questions including prevalence and assessment tools, comparative effectiveness of preventive and treatment interventions, and cost-effectiveness of PPD management have been analyzed. Conclusions: The General Council of Psychology of Spain network advocates the establishment of compulsory screening protocols in all the autonomous regions. Also, it is necessary to promote the inclusion in maternal education of programs for the promotion of mental well-being and selective/indicated prevention carried out by a psychology professional with specialized training in the area. This consensus document also promotes the presence of a psychology professional with specialized training in the area. Antecedentes. La depresión perinatal es un importante problema de salud pública, con una prevalencia estimada de aproximadamente el 15% durante el primer año posparto. A pesar de la gran prevalencia de depresión posparto (DPP), no existe consenso sobre la evaluación y el tratamiento en el contexto español. El Consejo General de Psicología de España convocó a un grupo de trabajo de expertos en la materia, tanto académicos como profesionales sanitarios, para revisar y proponer recomendaciones basadas en evidencias y mejores prácticas que puedan aplicarse en el contexto español. Método. Se realizó una búsqueda bibliográfica en varias bases de datos (p. ej., Medline, PsychInfo) que incluía una combinación de términos relacionados con la evaluación y el diagnóstico de la DPP, prevención, tratamiento y coste-eficacia. Se ha realizado una síntesis narrativa de la literatura junto con una visión crítica de la DPP con un enfoque especial en el contexto español. Resultados. Las preguntas de desarrollo que incluyen prevalencia y herramientas de evaluación, la eficacia comparativa de las intervenciones preventivas y de tratamiento y la relación coste-efectividad de la gestión de la PPD se han analizado en este informe de consenso. Conclusiones. La red del Consejo General de Psicología de España aboga por el establecimiento de protocolos obligatorios de cribado en todas las Comunidades Autónomas. Asimismo, es necesario promover la inclusión en la educación materna de programas de promoción del bienestar mental y la prevención selectiva indicada llevadas a cabo por un profesional de la psicología con formación especializada en el área

    The Stromal Processing Peptidase of Chloroplasts is Essential in Arabidopsis, with Knockout Mutations Causing Embryo Arrest after the 16-Cell Stage

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    Stromal processing peptidase (SPP) is a metalloendopeptidase located in the stroma of chloroplasts, and it is responsible for the cleavage of transit peptides from preproteins upon their import into the organelle. Two independent mutant Arabidopsis lines with T-DNA insertions in the SPP gene were analysed (spp-1 and spp-2). For both lines, no homozygous mutant plants could be detected, and the segregating progeny of spp heterozygotes contained heterozygous and wild-type plants in a ratio of 2∶1. The siliques of heterozygous spp-1 and spp-2 plants contained many aborted seeds, at a frequency of ∼25%, suggesting embryo lethality. By contrast, transmission of the spp mutations through the male and female gametes was found to be normal, and so gametophytic effects could be ruled out. To further elucidate the timing of the developmental arrest, mutant and wild-type seeds were cleared and analysed by Nomarski microscopy. A significant proportion (∼25%) of the seeds in mutant siliques exhibited delayed embryogenesis compared to those in wild type. Moreover, the mutant embryos never progressed normally beyond the 16-cell stage, with cell divisions not completing properly thereafter. Heterozygous spp mutant plants were phenotypically indistinguishable from the wild type, indicating that the spp knockout mutations are completely recessive and suggesting that one copy of the SPP gene is able to produce sufficient SPP protein for normal development under standard growth conditions

    Youth transitions as ‘wiki-transitions’ in youth policies platforms

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    The version of a journal article that has been accepted for publication in a journal. This is an Accepted Manuscript of an article published by Taylor & Francis in European Societies on 22/11/2019 available online: http://www.tandfonline.com/10.1080/14616696.2019.1690158.In recent years, a number of youth-focused online platforms have emerged which, in different ways, seek to support young people across Europe in building pathways to independent adulthood. In this article, we draw on data from Edgeryders, a recent youth policy research project, to reflect on the extent to which online discussion platforms are useful instruments for understanding the challenges youth face in their transitions to independent adulthood across Europe. Noting the collaborative emphasis articulated by both the project designers and participants, we ask how we might make sense of the data – and the meanings conveyed by that data – produced by online projects. We propose the notion of ‘wiki-transitions’ as a means of theorising young people’s use of online space to support their transitions to adulthood
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