12,729 research outputs found

    Fermion localization on branes with generalized dynamics

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    In this letter we consider a specific model of braneworld with nonstandard dynamics diffused in the literature, specifically we focus our attention on the matter energy density, the energy of system, the Ricci scalar and the thin brane limit. As the model is classically stable and capable of localize gravity, as a natural extension we address the issue of fermion localization of fermions on a thick brane constructed out from one scalar field with nonstandard kinetic terms coupled with gravity. The contribution of the nonstandard kinetic terms in the problem of fermion localization is analyzed. It is found that the simplest Yukawa coupling ηΨˉϕΨ\eta\bar{\Psi}\phi\Psi support the localization of fermions on the thick brane. It is shown that the zero mode for left-handed can be localized on the thick brane depending on the values for the coupling constant η\eta.Comment: 6 pages, 3 figure

    Improvement of a System for Catchment, Pretreatment and Treatment of Runoff Water Using PIV Tests and Numerical Simulation

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    This paper studies how to improve the efficiency of a new system for catchment, pretreatment, and treatment of runoff water (SCPT). This system is integrated into an urban sustainable gravity settler that can decrease diffusive pollution. This study provides important advantages for the ecosystem by improving new sustainable drainage to clean runoff water. In this paper, an investigation methodology known as hybrid engineering (HE) was used. HE combines experimental tests and numerical simulations, both of them conducted on a 1:4-scale prototype. In this study, numerical simulations by the finite-volume method (FVM) and experimental tests by particle image velocimetry (PIV) were compared. A strong correlation between the numerical and experimental analysis was found. Next, the efficiency of the SCPTwas optimized by design of experiments (DOE). Analysis of experimental and numerical results and their comparison are presented in this paper.The authors wish to express their gratitude to the Spanish Ministry of Economy and Competitiveness for the research project BIA2009-08272 funding

    Assessment of an aerobic granular sludge system in the presence of pharmaceutically active compounds by quantitative image analysis and chemometric techniques

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    In this study, a sequencing batch reactor (SBR) with aerobic granular sludge (AGS) was operated with synthetic wastewater containing environmental relevant concentrations of 17-estradiol (E2), 17-ethinylestradiol (EE2) and sulfamethoxazole (SMX). Despite the presence of the studied PhAC, the granular fraction clearly predominated (TSSgran/TSS ranging from 0.82 to 0.98) throughout the monitoring period, presenting aggregates with high organic fraction (VSS/TSS above 0.83) and good settling characteristics (SVI5 ranging from 15 to 39 mL/gTSS). A principal component analysis (PCA) with quantitative image analysis (QIA) based data allowed to distinguish the different operational periods, namely with mature granules (CONT), and the E2, EE2, and SMX feeding periods. It further revealed a positive relationship between the biomass density, sludge settling ability, overall and granular biomass contents, granulation properties, granular biomass fraction and large granules fraction and size. Moreover, a discriminant analysis (DA) allowed to successfully discriminate not only the different operational periods, mainly by using the floccular apparent density, granular stratification and contents data, but also the PhAC presence in samples. The filamentous bacteria contents, sludge settling properties, settling properties stability and granular stratification, structure and contents parameters were found to be crucial for that purpose.The authors thank the Portuguese Foundation for Science and Technology (FCT) under the scope of the strategic funding of UIDB/04469/2020 unit and the project AGeNT - PTDC/BTA-BTA/31264/2017 (POCI-01-0145-FEDER-031264). We would also like to thank the scientific collaboration under the FCT project UIDB/50016/2020. The authors wish to thank the company Águas do Tejo Atlântico, S.A. for supplying the granules. Cristiano Leal is recipient of a fellowship supported by a doctoral advanced training (call NORTE-69-2015-15) funded by the European Social Fund under the scope of Norte2020 - Programa Operacional Regional do Norte. A. Val del Rio is supported by Xunta de Galicia (ED418B 2017/075) and program Iacobus (2018/2019). Daniela P. Mesquita and Cristina Quintelas thanks FCT for funding through program DL 57/2016 – Norma transitória. Cristiano Leal also thank to Renê Benevides for all the support during the experimental activities.info:eu-repo/semantics/publishedVersio

    The INTEGRAL view of the Soft Gamma-ray Repeater SGR 1806-20

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    We present the results obtained by INTEGRAL on the Soft-Gamma Ray Repeater SGR 1806-20. In particular we report on the temporal and spectral properties of the bursts detected during a moderately active period of the source in September and October 2003 and on the search for quiescent emission.Comment: To appear in the proceedings (ESA-SP) of the 5th INTEGRAL Workshop, "The INTEGRAL UNIVERSE", Munich, 16-20 February 200

    Estudio Psoriafarm Bizkaia: características más relevantes

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    Introducción: La psoriasis es una enfermedad crónica que influye mucho en la autoestima y la calidad de vida. La mejor manera de evaluar su impacto es llevar a cabo estudios que recojan la opinión de los propios pacientes. La farmacia es un recurso muy adecuado para realizarlos, pues a ella acuden todo tipo de pacientes independientemente de la gravedad del trastorno y/o del estatus de tratamiento. Objetivos: Conocer las variables sociodemográfi cas, la localización y el tipo de psoriasis, el tiempo de evolución, las comorbilidades,la pertenencia a asociaciones, la relación con el médico y los conocimientos sobre psoriasis. Métodos: Estudio descriptivo utilizando tres cuestionarios: SF-36, Skindex-29 y Psoriafarm. Se presentan los datos preliminares. Resultados: Participaron 47 farmacéuticos de 36 farmacias, que recogieron 200 respuestas válidas (52% mujeres y 48% varones). El 60,5% de los encuestados llevaban más de 10 años diagnosticados, el 78% presentaban afección moderada o leve, y la presentación más frecuente era la vulgar o en placas (53%). El 37% padecía otra enfermedad crónica. El 84% refirió empeorar con el estrés y un 49,5% había sufrido un trastorno emocional en el último año. El 56,5% consideraba que no disponía de información suficiente sobre su enfermedad, y un 58% estaba satisfecho con la atención médica. Conclusiones: Los datos obtenidos en cuanto al tipo de psoriasis concuerdan con los procedentes de otros trabajos realizados en distintos ámbitos. Los resultados muestran la importancia de los factores emocionales en la sintomatología de la psoriasis. Aunque la relación con los médicos recibe una buena calificación, los pacientes demandan más información sobre la enfermedad y los tratamientos, que podría facilitarse desde la farmacia, aunque no existen prácticamente estudios sobre intervenciones en este ámbito
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