Diálogos sobre la catedral de Plasencia

SIAM. Series Iberoamericanas de Museología. Año 3, Vol.

Self-consistent optical constants of MgF2,LaF3, and CeF3 films

18 pags., 11 figs., 3 tabs.Various fluorides are materials in nature that extend their transparency range to the shortest wavelengths in the far ultraviolet (FUV, 100nm<¿<200 nm). These are relevant materials to prepare multilayer coatings in the FUV for demanding applications such as space instrumentation for astrophysics, solar physics and atmosphere physics, as well as free electron lasers, plasma diagnostics, synchrotron radiation, lithography, spectroscopy, etc. Multilayer design requires the optical constants of the coating materials. Multilayers optimally alternate two transparent materials with contrasting refractive indices. The optical constants of a low-index material, MgF2, and of two high-index materials, LaF3 and CeF3, have been determined in a wide spectral range and are presented here. Thin films of MgF2, LaF3, and CeF3 were deposited by boat evaporation onto substrates at 523 K. Transmittance, reflectance, and ellipsometry measurements were performed in ranges jointly covering the 30- 950-nm spectral range. This range was extended with literature data and extrapolations to obtain self-consistent optical constants using the Kramers-Kronig (KK) analysis. An iterative, double KK analysis procedure (successive reflectance-phase and k-n KK analyses) was carried out to obtain a self-consistent set of optical constants per material. With the final data sets, the experimental measurements were satisfactorily reproduced. Global self-consistency of the data sets was successfully evaluated through sum rules; additionally, local selfconsistency at each photon energy range was also evaluated through a novel sum-rule method which involves window functions. The new sets of optical constant extend the data availability mainly to the FUV and beyond, particularly for CeF3, where few data had been reported.Spanish Programa Estatal de Investigación Científica y Técnica de Excelencia, Secretaría de Estado de Investigación, Desarrollo e Innovación (AYA2013-42590-P and ESP2016-76591-P).Peer Reviewe

Narrowband filters for the FUV range

10 págs.; 6 figs.; 4 tabs.We address the design, fabrication, and characterization of transmittance filters for the Ionosphere Photometer instrument (IP), developed by the Center for Space Science and Applied Research (CSSAR). IP, a payload of Feng-Yun 3D meteorological satellite, to be launched on 2016, is aimed to perform photometry measurements of Earth¿s ionosphere by the analysis of the OI (135.6 nm) spectral line and N2 Lyman-Birge-Hopfield (LBH, 140-180 nm) band, both of them in the far ultraviolet (FUV) range. The most convenient procedure to isolate a spectral band is the use of tunable transmittance filters. In many applications the intensity of the ultraviolet, visible and infrared background is higher than the intensity of the target FUV lines; therefore one of the most important requirements for transmittance filters is to reject (by reflecting and/or by absorbing) as efficiently as possible the visible and close ranges. In the FUV range, (Al/MgF2)n transmittance filters are the most common, and they are suitable to reject the visible and adjacent ranges. These materials present unique properties in this range: MgF2 is transparent down to ~115 nm and Al has a very low refractive index in the FUV that contrasts well with MgF2. Narrowband tunable filters with very low transmittance at long wavelengths are achievable. The main data on the preparation and characterization of IP filters by Grupo de Óptica de Láminas Delgadas (GOLD) is detailed. In this proceeding we present (Al/MgF2)3 filters peaked at either 135.6 nm or at the center of the LBH band (~160 nm). Filters were characterized in the 125-800 nm range (143-800 nm range for the LBH filter). After some storage in a desiccator, both coatings kept a transmittance of ~0.14 at their target wavelengths, with visible-topeak transmittance ratios of 1.2·10-4 (OI filter) and 1.3·10-4 (LBH filter). One filter tuned at each target wavelength was exposed to ~300 Gy 60Co gamma dose, with no significant transmittance change. Keywords: Coatings, Far Ultraviolet, Atmosphere Physics, Transmittance Filters, Space OpticsThis research was partly supported by the National Programme for Research, Subdirección General de Proyectos de Investigación, Ministerio de Ciencia e Innovación, project number AYA2010-22032 and AYA2013- 42590-P. The authors are gratefully acknowledged to Pedro Valdivieso (Instalación de irradiación Náyade, CIEMAT).Peer Reviewe

Genome‐wide transcriptomic and proteomic analysis of the primary response to phosphate limitation in Streptomyces coelicolor M145 and in a ΔphoP mutant

[EN] Phosphate limitation in Streptomyces and in other bacteria triggers expression changes of a large number of genes. This response is mediated by the two-component PhoR-PhoP system. A Streptomyces coelicolor ΔphoP mutant (lacking phoP) has been obtained by gene replacement. A genome-wide analysis of the primary response to phosphate limitation using transcriptomic and proteomic studies has been made in the parental S. coelicolor M145 and in the ΔphoP mutant strains. Statistical analysis of the contrasts between the four sets of data generated (two strains under two phosphate conditions) allowed the classification of all genes into 12 types of profiles. The primary response to phosphate limitation involves upregulation of genes encoding scavenging enzymes needed to obtain phosphate from different phosphorylated organic compounds and overexpression of the high-affinity phosphate transport system pstSCAB. Clear interactions have been found between phosphate metabolism and expression of nitrogen-regulated genes and between phosphate and nitrate respiration genes. PhoP-dependent repressions of antibiotic biosynthesis and of the morphological differentiation genes correlated with the observed ΔphoP mutant phenotype. Bioinformatic analysis of the presence of PHO boxes (PhoP-binding sequences) in the upstream regions of PhoP-controlled genes were validated by binding of PhoP, as shown by electrophoretic mobility shift assaysSIThis work was supported by grants of the CICYT (Madrid,Spain) to J. F. M. (BIO2003-01489 and GEN2003-20245-C09-01) and of the European Union (Project ActinoGEN OJ 2003/C164). A. Rodríguez was supported by a Torres Quevedo contract (PTQ2002-0468), and F. Santos received a FPI fellowship from the Ministry of Education (Madrid, Spain). We thank J. Merino, B. Martín, A. Casenave, and B. Aguado for excellent technical assistance, and V. Mersinias, O. Domínguez, L. Lombardía, and J.C. Oliveros for helpful discussion of microarray procedure

VUV reflectometer for in-situ measurement of coatings

290. PTB-Seminar, VUV and EUV Metrology, Berlin-Charlottenburg, Berlin, November 5th - 6th, 2015; http://www.euv2015.ptb.de/euv2015/euv2015-home.htmlAbstract comunicación póster: GOLD¿s reflectometer enables measuring absolute reflectance and transmittance versus incidence angle mainly in the 40-190 nm spectral range. VUV lines are generated with a windowless discharge lamp. The lamp is fed with various pure gases or gas mixtures with which it can generate many spectral lines to cover the spectral range of interest. The reflectometer chamber is connected in vacuum with two deposition chambers, one operating by evaporation and the other by ion-beam sputtering. Hence the reflectance/transmittance of a thin film or a multilayer can be measured in situ before the coating is exposed to the atmosphere. The combination of evaporation and sputtering permits the deposition of a wide range of materials. The two deposition chambers and the main reflectometer chamber operate in UHV conditions. In the presentation, examples of measurements performed with the reflectometer will be displayed. The reflectometer, covering an unusual spectral range, is offered to the community.Peer Reviewe

An online reputation analysis of the tourism industry in Marbella: a preliminary study on open innovation.

This research analyzed the online reputation of Marbella as a tourist destination and the profiles of the reviewers according to sociodemographic characteristics. A correlational, quantitative research technique was used in this study based on the manual extraction of more than 4000 reviews generated on TripAdvisor. The data used in this study were collected from the TripAdvisor website, taking, as a sample, tourists who had visited the city in the last three years. Ratings that did not provide full data on the variables were excluded. The findings show that Marbella is considered a luxury shopping destination. The preliminary conclusions allow us to generalize about the sociodemographic profile of its tourists. The findings of the study will provide valuable information for Marbella’s Destination Management Organization (DMO). On the one hand, this study highlights the importance of ranking the attractions of the city to create better communication strategies and enhance the appeal of those attractions that receive the best ratings, establishing the true vocation of Marbella as a tourist destination. On the other hand, it provides information on what tourists perceive to be negative elements, allowing the administration to create an improvement plan. The novelty of this research paper is that it delves into Marbella’s online reputation through an analysis of specific attractions’ ratings. Areas that require further attention in future research have been highlighted, along with specific advice on each attraction that contributes to the tourist offerings of the city.This research was funded partially by Universidad de Málaga. 10% Partial funding for open access charge: Universidad de Málaga / CBU

CENTESIL: An independent Research Centre on Polysilicon

The tremendous expansion of the photovoltaic technology and its relative avidity for silicon is producing a dramatic change in the polysilicon industry structure, increasing the efforts to produce a low cost, high quality Solar Silicon. In this context, the Centro de Tecnología del Silicio Solar (CENTESIL) was founded in 2006 as a private-public partnership venture, and is currently building a 50 t/a pilot plant for silicon purification following the chlorosilane route. Although an advanced state of the art technology has been selected as first choice, the purpose is to be able to undertake developments in any topic that has the potential to reduce the cost effectively. Additionally, the project includes facilities for monocrystalline growth and wafering, and also the solar cell processing line of the Instituto de Energía Solar, so that it will cover the whole value chain from feedstock to solar cell

SKOS application for interoperability of controlled vocabularies in the field of linked open data

This paper aims to determine the scope of application of SKOS in the Semantic Web. Controlled vocabularies registered in the The Data Hub catalog of RDF datasets that use SKOS were studied. In addition to establishing a typology of vocabularies, authors analyzed the issues related to open access to data through its direct download, its query through a Sparql endpoint and the existence of appropriate licenses. The existing level of interoperability through the definition of mapping relationships between vocabularies are examined. The study concludes that thesauri and classifications are more integrated into the open data environment while subject headings lists have greater interoperability

Assessment-oriented Java development vs. Clickers' use in formal assessment of basic principles of dental radiology: The opinion of dentistry students

[EN]The integration of Information and Communication Technologies (ICTs) has generated a change in teaching methodologies au university level. The objective of this study is to check the effectiveness of interactive processes in summative assessment or learning-oriented assessment contexts using electronic self assessment processes (Java application) versus the use of audience response systems (ARS) or “clickers” in the classroom, from the point of view of students’ satisfaction measurement. The sample for this study is composed by the students of the first year of the Degree on Dentistry of the School of Medicine of the University of Salamanca, and which was carried out by means of a questionnaire, where 1 stood for total disagreement and 7 for absolute agreement; together with an statistical analysis (Conbach alpha) that allows us to value the reliability of the answers obtained. Results reflect the students’ answers to the questionnaire, as well as the relationship between the two systems. To conclude, there are certain coincidences when judging both assessment tools, but we also observe that there is a better predisposition towards Java system rather than to clickers. The job done by a coordinated interdisciplinary team formed by members of different areas has made it possible to build and validate interesting pedagogical materials, as well as to develop formative assessment strategies that could be generalized to other subjects in different degrees

La Caridad/Solidaridad y su tratamiento informativo en la provincia sevillana: Utrera

Se ahonda en la idea de que no solamente son las Hermandades quienes realizan actos de Caridad y Solidaridad, sino que desde empresas y entidades privadas también se organizan eventos en este sentido. Hay que destacar que desde “Uvitel”, además de estar continuamente difundiendo estos eventos, como personas comprometidas con el entorno, en varias ocasiones se han sumado a estas causas, como destacar el organizar una “Cabalgata Solidaria” que consistió en implicar a empresas y diferentes colectivos para recaudar alimentos que luego se llevó a las Hermanas de la Cruz, de Utrera, una Congregación religiosa que realiza una labor altruista y desinteresada en favor de las familias más necesitadas, para que fueran ellas quienes repartieran todo lo recaudado