Spectropolarimetric analysis of an active region filament. I. Magnetic and dynamical properties from single component inversions

The determination of the magnetic filed vector in solar filaments is possible by interpreting the Hanle and Zeeman effects in suitable chromospheric spectral lines like those of the He I multiplet at 10830 A. We study the vector magnetic field of an active region filament (NOAA 12087). Spectropolarimetric data of this active region was acquired with the GRIS instrument at the GREGOR telescope and studied simultaneously in the chromosphere with the He I 10830 A multiplet and in the photosphere with the Si I 10827 A line. As it is usual from previous studies, only a single component model is used to infer the magnetic properties of the filament. The results are put into a solar context with the help of the Solar Dynamic Observatory images. Some results clearly point out that a more complex inversion had to be done. Firstly, the Stokes $V$ map of He I does not show any clear signature of the presence of the filament. Secondly, the local azimuth map follows the same pattern than Stokes $V$ as if the polarity of Stokes $V$ were conditioning the inference to very different magnetic field even with similar linear polarization signals. This indication suggests that the Stokes $V$ could be dominated by the below magnetic field coming from the active region, and not, from the filament itself. Those and more evidences will be analyzed in depth and a more complex inversion will be attempted in the second part of this series.Comment: 18 pages, 19 figures, accepted for publication in A&

El paradigma de la complejidad como instrumento teórico y metodológico en la investigación didáctica sobre la contaminación y sobre la energía

En dos investigaciones recientes (Cano, 2008; García, Rodríguez y Solís, 2008; Rodríguez, 2008), hemos utilizado el Paradigma de la Complejidad como instrumento teórico que ha orientado el diseño y desarrollo de dichas investigaciones. En la primera investigación (Cano, 2008), se realizó un estudio pormenorizado del proceso de construcción de conocimiento relevante y significativo sobre la contaminación del agua con alumnos de cuarto de ESO. En la segunda (García, Rodríguez y Solís, 2008; Rodríguez, 2008), se realizó una descripción del desarrollo de una experiencia de Agenda 21 Escolar, centrada en el tratamiento didáctico del uso de la energía en Primaria y Secundaria

On compactness results of Lions-Peetre type for bilinear operators

Let A¯ = (A0, A1) , B¯ = (B0, B1) be Banach couples, let E be a Banach space and let T be a bilinear operator such that kT(a, b)kE ≤ MjkakAj kbkBj for a ∈ A0 ∩ A1, b ∈ B0 ∩ B1, j = 0, 1. If T : A◦ j × B◦ j −→ E compactly for j = 0 or 1, we show that T may be uniquely extended to a compact bilinear operator from the complex interpolation spaces generated by A¯ and B¯ to E. Furthermore, the corresponding result for the real method is given and we also study the case when E is replaced by a couple (E0, E1) of Banach function spaces on the same measure space.Agencia Estatal de Investigación | Ref. MTM2017-84058-

Delineating zones to increase geographical detail in individual response data files: An application to the Spanish 2011 Census of population

Due to confidentiality considerations, the microdata available from the 2011 Spanish Census have been codified at a provincial (NUTS 3) level except when the municipal (LAU 2) population exceeds 20,000 inhabitants (a requirement that is met by less than 5% of all municipalities). For the remainder of the municipalities within a given province, information is only provided for their classification in wide population intervals. These limitations, hampering territorially-focused socio-economic analyses, and more specifically, those related to the labour market, are observed in many other countries. This article proposes and demonstrates an automatic procedure aimed at delineating a set of areas that meet such population requirements and that may be used to re-codify the geographic reference in these cases, thereby increasing the territorial detail at which individual information is available. The method aggregates municipalities into clusters based on the optimisation of a relevant objective function subject to a number of statistical constraints, and is implemented using evolutionary computation techniques. Clusters are defined to fit outer boundaries at the level of labour market areas.This work was supported by the Spanish Ministry of Economy and Competitiveness (grant number CSO2014-55780-C3-2-P, National R&D&i Plan 2013-2016)

Los procesos de amalgamación a través de los tiempos

La plata, junto con el oro y el cobre, fue quizá uno de los primeros metales conocidos por el hombre. Inicialmente se explotaron las pequeñas mineralizaciones de elementos nativos, presentes en filones, monteras o placeres. Pero el camino seguido hasta la concentración del oro y de la plata a partir de los minerales que los contienen fue largo. Ya en época romana, se experimentó un importante avance con el descubrimiento de la amalgamación, término que describe la aleación que se produce entre el mercurio y algunos metales, que generalmente se muestra sólida o semilíquida

Interpolation of compact bilinear operators among quasi-Banach spaces and applications

We study the interpolation properties of compact bilinear operators by the general real method among quasi-Banach couples. As an application we show that some commutators of Calderón-Zygmund bilinear operators are compact.Agencia Estatal de Investigación | Ref. MTM2017-84058-

Paso a paso: el tratamiento de los bienes arqueológicos en las leyes de patrimonio de Valencia y Madrid

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