The opinion of students on teaching methods

[EN] We conducted an investigation into certain methodologies described by Finkel in his book((Teaching withyour mouth shut)). This research consists of an assessment carried out by students from I.E.S. Bovalarin Castell on through a survey. The research aims to prove whether there is a relationship between thosemethodologies that students consider more participatory, and those which they would like their teachers touse, in other words, if students prefer to use teaching methods which get them more involved, and wherethey are the center of the teaching-learning process. Following a stadistical analysis using SPSS, we canconclude that there is a direct relationship between those methodologies which students considered moreparticipatory, and those which they would like their teachers to put into practice. Finally, we ascertainedthe importance of expanding the use of such estrategies to make learning meaningful and for students toimprove the acquisition of basic skills[ES] Se realiza una investigación sobre ciertas metodologías descritas por Finkel en su libro «Como dar clase con la boca cerrada». Esta investigación consiste en una valoración que realizan los alumnos del I.E.S. Bovalar de Castellón mediante una encuesta. La investigación pretende ver si hay relación entre aquellas metodologías que a los alumnos les parecen más participativas, y las que les gustaría que sus profesores utilizaran, es decir, si los alumnos prefieren usar metodologías didácticas en que ellos se impliquen más, y donde ellos son el centro del proceso de Enseñanza-Aprendizaje. Después de un análisis estadístico mediante el programa SPSS, podemos concluir que si que existe una relación directa entre las metodologías más participativas desde el punto de vista de los alumnos, y las que les gustaría que sus profesores pusieran en práctica. Finalmente, realizamos una valoración de la importancia de ampliar el uso de este tipo de estrategias para conseguir que el aprendizaje sea significativo y que los alumnos mejoren en la adquisición de las competencias básicas.Carbó, S.; Meseguer, S.; Juan, P. (2017). La opinión de los estudiantes sobre metodologías docentes. Modelling in Science Education and Learning. 10(1):193-198. doi:10.4995/msel.2017.6677.SWORD193198101Finkel, D. 2008. Como dar clase con la boca cerrada. 1ra Edición. València: Publicaciones de la Universitat de València. ISBN 978-84-370-6860-2

Another beauty of analytical chemistry: chemical analysis of inorganic pigments of art and archaeological objects

[EN] This lecture text shows what fascinating tasks analytical chemists face in Art Conservation and Archaeology, and it is hoped that students reading it will realize that passions for science, arts or history are by no means mutually exclusive. This study describes the main analytical techniques used since the eighteenth century, and in particular, the instrumental techniques developed throughout the last century for analyzing pigments and inorganic materials, in general, which are found in cultural artefacts, such as artworks and archaeological remains. The lecture starts with a historical review on the use of analytical methods for the analysis of pigments from archaeological and art objects. Three different periods can be distinguished in the history of the application of the Analytical Chemistry in Archaeometrical and Art Conservation studies: (a) the "Formation'' period (eighteenth century1930), (b) the "Maturing'' period (1930-1970), and (c) the "Expansion'' period (1970-nowadays). A classification of analytical methods specifically established in the fields of Archaeometry and Conservation Science is also provided. After this, some sections are devoted to the description of a number of analytical techniques, which are most commonly used in routine analysis of pigments from cultural heritage. Each instrumental section gives the fundamentals of the instrumental technique, together with relevant analytical data and examples of applications.Financial support is gratefully acknowledged from Spanish ‘‘I+D+I MINECO’’ projects CTQ2011-28079-CO3-01 and CTQ2014-53736-C3-1-P supported by ERDEF funds.Domenech Carbo, MT.; Osete Cortina, L. (2016). 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Springer, New YorkAllen RO (ed) (1989) Archaeological chemistry IV; Advances in chemistry. American Chemical Society, Washington, DCAitken MJ (1990) Science-based dating in archaeology. Longman Archaeology Series, New YorkCiliberto E, Spoto G (eds) (2000) Modern analytical methods in art and archaeology. Wiley, New YorkMatteini M, Moles A (1986) Sciencia e Restauro. Metodi di Indagine, 2nd edn. Nardini, FirenzeOdegaard N, Carroll S, Zimmt W (2000) Material characterization tests for objects of art and archaeology. Archetype Publications, LondonDerrick MR, Stulik DC, Landry MJ (1999) Infrared spectroscopy in conservation science. Getty Conservation Institute, Los AngelesDoménech-Carbó A, Doménech-Carbó MT, Costa V (2009) Electrochemical methods in archaeometry, conservation and restoration. In: Scholz F (ed) Series: Monographs in electrochemistry. Springer, BerlinEdwards HGM, Chalmers JM (eds) (2005) Raman spectroscopy in archaeology and art history. 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National Gallery of Art, Washington, pp 65–108Domenech-Carbó MT, de Agredos Vazquez, Pascual ML, Osete-Cortina L, Domenech A, Guasch-Ferré N, Manzanilla LR, Vidal C (2012) Characterization of Pre-hispanic cosmetics found in a burial of the ancient city of Teotihuacan (Mexico). J Archaeol Sci 39:1043–1062Mühlethaler B, Thissen J (1993) Smalt. In: Roy A (ed) Artists’ pigments. A handbook of their history and characteristics, vol 2. National Gallery of Art, Washington, pp 113–130Musumarra G, Fichera M (1998) Chemometrics and cultural heritage. Chemometr Intell Lab Syst 44:363–372Hochleitner B, Schreiner M, Drakopoulos M, Snigireva I, Snigirev A (2005) Analysis of paint layers by light microscopy, scanning electron microscopy and synchrotron induced X-ray micro-diffraction. In: Van Grieken R, Janssens K (eds) Cultural heritage conservation and environment impact assessment by non-destructive testing and micro-analysis. 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Analyzing the impact of the MPI allreduce in distributed training of convolutional neural networks

For many distributed applications, data communication poses an important bottleneck from the points of view of performance and energy consumption. As more cores are integrated per node, in general the global performance of the system increases yet eventually becomes limited by the interconnection network. This is the case for distributed data-parallel training of convolutional neural networks (CNNs), which usually proceeds on a cluster with a small to moderate number of nodes. In this paper, we analyze the performance of the Allreduce collective communication primitive, a key to the efficient data-parallel distributed training of CNNs. Our study targets the distinct realizations of this primitive in three high performance instances of Message Passing Interface (MPI), namely MPICH, OpenMPI, and IntelMPI, and employs a cluster equipped with state-of-the-art processor and network technologies. In addition, we apply the insights gained from the experimental analysis to the optimization of the TensorFlow framework when running on top of Horovod. Our study reveals that a careful selection of the most convenient MPI library and Allreduce (ARD) realization accelerates the training throughput by a factor of 1.2× compared with the default algorithm in the same MPI library, and up to 2.8× when comparing distinct MPI libraries in a number of relevant combinations of CNN model+dataset

Preliminary morphologic and molecular study of teh Entoloma rusticoides group (Agaricales - Basidiomycota)

Es presenta un estudi sobre el grup rusticoides del gènere Entoloma subgènere Claudopus a la Península Ibérica. L'anàlisi filogenètica, sobre la base de 48 seqüències d'ITS i 45 seqüències de LSU, entre les quals, les dels tipus de 8 dels tàxons analitzats, mostra una marcada diversitat genètica que concorda amb la notable variabilitat observada en aquest grup. D'acord amb aquest fet, es descriuen els següents nous tàxons: E. almeriense, E. graphitipes f. cystidiatum, E. halophilum, E. muscoalpinum i E. phaeocarpum. A més, es tipifiquen E. phaeocyathus i E. rusticoides. S'inclouen claus provisionals d'identificació. S'aporten descripcions macro i microscòpiques, dibuixos i fotografies de la majoria dels tàxons estudiats.A study of the Entoloma rusticoides-group (subgenus Claudopus) in the Iberian peninsula is presented. Phylogenetic inference, based on 48 nrITS and 45 28S nrLSU sequences, including those of 8 type specimens, revealed a high genetic diversity, in accordance with the observed morphological variability in this group. In addition new taxa are proposed to accomodate independent lineages (E. almeriense, E. graphitipes f. cystidiatum, E. halophilum, E. muscoalpinum and E. phaeocarpum) and the typification of E. phaeocyathus and E. rusticoides is proposed. Preliminary taxonomic keys are included to help identification. For most species macro and microscopic descriptions, drawings and photographs are presented

Fertilización nitrogenada en olivo cv. Empeltre. II.- composición polifenólica de hojas y frutos y calidad del aceite

4 Pags.- 1 Tabl.- 3 Figs.El establecimiento de posibles relaciones entre el estado nutricional del olivo, la composición polifenólica de sus hojas y frutos y la calidad del aceite, sólo puede llevarse a cabo en experimentos de fertilización controlados, donde se estudie el efecto de un sólo elemento nutriente, manteniendo constantes todos los demás parámetros agronómicos. Este es el objetivo del presente trabajo. Realizar un estudio de este tipo, es tarea compleja, interdisciplinar, y exige un largo periodo de tiempo de observación y seguimiento. Nuestro equipo la ha abordado, aunque consciente de que no se puede llegar en corto plazo a resultados concluyentes. La reconocida calidad de los aceites de Aragón (GRACIA, 1991, 1996, 2001) y la peculiaridad de las principales variedades aquí implantadas, Empeltre y Arbequina, han motivado la puesta en marcha de dos experimentos de fertilización con árboles jóvenes (uno en cada variedad), que puedan contribuir a mejorar su conocimiento. En dos trabajos previos (MONGE et al., 2002 a y b) se da cuenta de los datos relativos a cada uno de los experimentos, así como de los primeros resultados del estudio de los suelos, del estado nutritivo de los árboles y del crecimiento de éstos. El presente trabajo sintetiza los primeros datos obtenidos en el ensayo de fertilización nitrogenada con la variedad Empeltre sobre el contenido de los polifenoles en hoja y fruto y sobre la calidad del aceite.Este trabajo ha sido subvencionado por el MAPA, Programa de Mejora de la Calidad de la Producción de Aceite de Oliva, proyecto CAO99-020-C2.Peer reviewe

Fertilización nitrogenada en olivo cv. Empeltre. I.- Contenido en nutrientes y crecimiento del árbol

4 Pags.- 2 Tabls.- 2 Figs.En este trabajo se estudia el efecto que produce el abonado nitrogenado sobre el contenido de nutrientes en hoja y la productividad en un olivar muy joven, aplicando tres dosis de nitrógeno durante tres campañas (1999-2001).Esta trabajo ha sido subvencionado por el MAPA dentro del Programa Mejora Producción Aceite, proyecto CAO99-020-C2 y por el Gobierno de Aragón con los Proyectos I+D con referencias P29/97 I.Peer reviewe

Determinants of profitability in Spanish financial institutions. Comparing aided and non-aided entities

The last financial crisis has led to the greatest contribution of public funds ever made to Spanish banks. This paper studies why the need for support has been asymmetric, with not all of the institutions requiring aid. Based on profitability of assets (ROA), we determine using panel data econometric and logit response models the components of profit and loss accounts that generated profitability as well as the factors leading to some entities to ask for aid. The analyses show that before the beginning of the crisis there were significant differences between entities that needed aid and those that did not. The most profitable banks grounded their success in the traditional revenue components of financial institutions (such as margin on interest rates and commissions), as well as in revenues obtained from participated companies and extraordinary results. The model offers a tool to detect entities in difficulties in advance, reducing the financial and social costs of public interventions. The factors more impacting on profitability of Spanish institutions are also identifie

Preliminary morphologic and molecular study of teh Entoloma rusticoides group (Agaricales - Basidiomycota)

Es presenta un estudi sobre el grup rusticoides del gènere Entoloma subgènere Claudopus a la Península Ibérica. L'anàlisi filogenètica, sobre la base de 48 seqüències d'ITS i 45 seqüències de LSU, entre les quals, les dels tipus de 8 dels tàxons analitzats, mostra una marcada diversitat genètica que concorda amb la notable variabilitat observada en aquest grup. D'acord amb aquest fet, es descriuen els següents nous tàxons: E. almeriense, E. graphitipes f. cystidiatum, E. halophilum, E. muscoalpinum i E. phaeocarpum. A més, es tipifiquen E. phaeocyathus i E. rusticoides. S'inclouen claus provisionals d'identificació. S'aporten descripcions macro i microscòpiques, dibuixos i fotografies de la majoria dels tàxons estudiats.A study of the Entoloma rusticoides-group (subgenus Claudopus) in the Iberian peninsula is presented. Phylogenetic inference, based on 48 nrITS and 45 28S nrLSU sequences, including those of 8 type specimens, revealed a high genetic diversity, in accordance with the observed morphological variability in this group. In addition new taxa are proposed to accomodate independent lineages (E. almeriense, E. graphitipes f. cystidiatum, E. halophilum, E. muscoalpinum and E. phaeocarpum) and the typification of E. phaeocyathus and E. rusticoides is proposed. Preliminary taxonomic keys are included to help identification. For most species macro and microscopic descriptions, drawings and photographs are presented

FIB-FESEM and EMPA results on Antoninianus silver coins for manufacturing and corrosion processes

[EN] A set of ancient Antoninianus silver coins, dating back between 249 and 274¿A.D. and minted in Rome, Galliae, Orient and Ticinum, have been characterized. We use, for the first time, a combination of nano-invasive (focused ion beam-field emission scanning electron microscopy-X-ray microanalysis (FIB-FESEM-EDX), voltammetry of microparticles (VIMP)) and destructive techniques (scanning electron microscopy (SEM-EDX) and electron microprobe analysis (EMPA)) along with non-invasive, i.e., micro-Raman spectroscopy. The results revealed that, contrary to the extended belief, a complex Ag-Cu-Pb-Sn alloy was used. The use of alloys was common in the flourishing years of the Roman Empire. In the prosperous periods, Romans produced Ag-Cu alloys with relatively high silver content for the manufacture of both the external layers and inner nucleus of coins. This study also revealed that, although surface silvering processes were applied in different periods of crisis under the reign of Antoninii, even during crisis, Romans produced Antoninianus of high quality. Moreover, a first attempt to improve the silvering procedure using Hg-Ag amalgam has been identified.Financial support was provided by Sapienza University of Rome (Ateneo funding, 2014 15) and Spanish projects CTQ2014-53736-C3-1-P and CTQ2014-53736-C3-2-P, which are supported with Ministerio de Economía, Industria y Competitividad (MINECO) and Fondo Europeo de Desarrollo Regional (ERDF) funds, as well as project CTQ2017-85317-C2-1-P supported with funds from, MINECO, ERDF and Agencia Estatal de Investigación (AEI). PhD grants of the Department of Earth Sciences, Sapienza University of Rome, are gratefully acknowledgedDomenech Carbo, MT.; Di Turo, F.; Montoya, N.; Catalli, F.; Doménech Carbó, A.; De Vito, C. (2018). 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Interleukin-15 antagonizes muscle protein waste in tumour-bearing rats

Tissue protein hypercatabolism (TPH) is an important feature in cancer cachexia, particularly with regard to the skeletal muscle. The Yoshida AH-130 rat ascites hepatoma is a model system for studying the mechanisms involved in the processes that lead to tissue depletion, since it induces in the host a rapid and progressive muscle wasting, primarily due to TPH. The present study was aimed at investigating if IL-15, which is known to favour muscle fibre hypertrophy, could antagonize the enhanced muscle protein breakdown in this cancer cachexia model. Indeed, IL-15 treatment partly inhibited skeletal muscle wasting in AH-130-bearing rats by decreasing (8-fold) protein degradative rates (as measured by14C-bicarbonate pre-loading of muscle proteins) to values even lower than those observed in non-tumour-bearing animals. These alterations in protein breakdown rates were associated with an inhibition of the ATP-ubiquitin-dependent proteolytic pathway (35% and 41% for 2.4 and 1.2 kb ubiquitin mRNA, and 57% for the C8 proteasome subunit, respectively). The cytokine did not modify the plasma levels of corticosterone and insulin in the tumour hosts. The present data give new insights into the mechanisms by which IL-15 exerts its preventive effect on muscle protein wasting and seem to warrant the implementation of experimental protocols involving the use of the cytokine in the treatment of pathological states characterized by TPH, particularly in skeletal muscle, such as in the present model of cancer cachexia. © 2000 Cancer Research Campaig