Voces extremeñas

Cuando por realizar la Tesis de Licenciatura y, posteriormente, la Tesis Doctoral, ambas sobre toponimia extremeña, hube de consultar diferentes diccionarios, descubro, no sin cierta extrañeza, que ni en el de la Academia, ni siquiera en el “Diccionario Crítico Etimológico Castellano e Hispánico”, se hace apenas referencia al uso de voces o acepciones en Extremadura. Uso que, sin embargo, aparece localizado en áreas lingüísticas del castellano tan lejanas como las de Hispanoamérica. Comentándoselo en una ocasión a J.A. Pascual, responsable con J. Corominas del mencionado diccionario, este reconocido lexicógrafo me animó a dar a conocer esas ausencias. Las páginas que siguen recogen una pequeña muestra del conjunto de voces toponímicas documentadas en la Comarca Tierra de Barros, en la provincia de Badajoz, que prueban cómo, en ningún caso, aparecen localizadas, en los mencionados diccionarios, en tierras pacenses, e incluso se aportan algunas que siguen vigentes en estas hablas comarcales. Otras, en fin, demuestran por su antigüedad cómo antes de ser embarcadas con rumbo a América ya existían en tierras de Badajoz.As I was doing both my end of Degree Thesis and, later on, my Doctoral Thesis, I had to look up different dictionaries. It was then that I discovered, to my amazement, that neither the Academy Dictionary nor in the “Diccionario Crítico Etimológico Castellano e Hispánico”, had entries to the use of special meanings of words in Extremadura. Such use, however, can be found in distant varieties such as those spoken in Latin America. When I mentioned this to J.A. Pascual, co-author, together with J. Corominas, of the aforementioned dictionary, this well-known lexicographer encouraged me to make these omissions known to the academic community. The following pages gather a small sample of a set of toponimic voices documented in the Region of Tierra de Barros, in the province of Badajoz. They prove that the dictionaries do not mention these entries, which also appear located in regional varieties of the language. Other forms, however, show by their etymology that they had been present in Badajoz before they embarked for America.peerReviewe

Parvenir au récit du trauma, estce possible?

J.A. n’a pas vécu directement le trauma, ni la terreur, ni la menace de mort, ni l’exil. En tant que fille de survivants du génocide des Arméniens, elle se situe comme héritière. Son élaboration porte sur la transmission d’une histoire traumatique, sa part d’impossible au sein de la famille, ce qui de cette transmission se joue pour une grande part dans l’inconscient. D’où le recours à l’analyse, et la possibilité qu’elle y trouve d’une élaboration. Ses textes sont en effet le fruit d’une reprise, au moyen de l’écriture, de son travail en tant qu’analysante. Qu’elle le déclare simplement était exceptionnel dans les années 90

Intensifying glycerol steam reforming on a monolith catalyst: a reaction kinetic model

In this work, a structured monolithic catalyst has been tested under a wide range of conditions (partial pressure, residence time, temperature and time-on-stream), with the aim of modeling its kinetic behavior and assessing its economic and upscaling potential. We have developed a sequential model to help us interpret both main trends and salient features. Unexpected behavior was found for certain parameter values, which led us to consider kinetic parasitic effects such as mass or heat transfer limitations. By independently invoking these effects, a conciliatory view of the results observed could not be reached. A combined explanation may prove successful, although overfitting could not be ruled out at this point. More importantly, however, the observed salient features of this stable and selective monolith catalyst may hold potential for process intensification of glycerol steam reforming, thus contributing to a more sustainable industry.Ministerio de Economía y Competitividad ENE2013-47880-C3-2-R, ENE2015-66975-C3-2-

High temperature magnetic stabilization of cobalt nanoparticles by an antiferromagnetic proximity effect

Thermal activation tends to destroy the magnetic stability of small magnetic nanoparticles, with crucial implications in ultra-high density recording among other applications. Here we demonstrate that low blocking temperature ferromagnetic (FM) Co nanoparticles (TB<70 K) become magnetically stable above 400 K when embedded in a high N\'eel temperature antiferromagnetic (AFM) NiO matrix. The origin of this remarkable TB enhancement is due to a magnetic proximity effect between a thin CoO shell (with low N\'eel temperature, TN; and high anisotropy, KAFM) surrounding the Co nanoparticles and the NiO matrix (with high TN but low KAFM). This proximity effect yields an effective AFM with an apparent TN beyond that of bulk CoO, and an enhanced anisotropy compared to NiO. In turn, the Co core FM moment is stabilized against thermal fluctuations via core-shell exchange-bias coupling, leading to the observed TB increase. Mean-field calculations provide a semi-quantitative understanding of this magnetic- proximity stabilization mechanism

Policies and Motivations for the CO2 Valorization through the Sabatier Reaction Using Structured Catalysts. A Review of the Most Recent Advances

The current scenario where the effects of global warming are more and more evident, has motivated different initiatives for facing this, such as the creation of global policies with a clear environmental guideline. Within these policies, the control of Greenhouse Gase (GHG) emissions has been defined as mandatory, but for carrying out this, a smart strategy is proposed. This is the application of a circular economy model, which seeks to minimize the generation of waste and maximize the efficient use of resources. From this point of view, CO2 recycling is an alternative to reduce emissions to the atmosphere, and we need to look for new business models which valorization this compound which now must be considered as a renewable carbon source. This has renewed the interest in known processes for the chemical transformation of CO2 but that have not been applied at industrial level because they do not offer evident profitability. For example, the methane produced in the Sabatier reaction has a great potential for application, but this depends on the existence of a sustainable supply of hydrogen and a greater efficiency during the process that allows maximizing energy efficiency and thermal control to maximize the methane yield. Regarding energy efficiency and thermal control of the process, the use of structured reactors is an appropriate strategy. The evolution of new technologies, such as 3D printing, and the consolidation of knowledge in the structing of catalysts has enabled the use of these reactors to develop a wide range of possibilities in the field. In this sense, the present review presents a brief description of the main policies that have motivated the transition to a circular economy model and within this, to CO2 recycling. This allows understanding, why efforts are being focused on the development of different reactions for CO2 valorization. Special attention to the case of the Sabatier reaction and in the application of structured reactors for such process is paid

Hydrogen production by methanol steam reforming on NiSn/MgO-Al 2O3 catalysts: The role of MgO addition

The effect of the magnesia loading on the surface structure and catalytic properties of NiSn/MgO-Al2O3 catalysts for hydrogen production by methanol steam reforming has been investigated. The catalysts have been obtained by impregnation of γ-Al2O3 by the incipient wetness method, with variation of the MgO content. X-ray diffraction (XRD), BET surface area and H2-temperature programmed reduction (TPR) have been used to characterise the prepared catalysts. From this, it has been concluded that the incorporation of MgO results in the formation of MgAl 2O4 spinel, which modifies the acid-base properties of the catalysts. The formation of Ni-Sn alloys after the reductive pre-treatment has also been evidenced. The influence of the temperature of reaction and of the MgO loading on the hydrogen production by reforming of methanol has been established. Moreover, tests of catalytic stability have been carried out for more than 20 h. The carbonaceous deposits have been examined by temperature-programmed oxidation (TPO). The analysis of the catalysts after reaction has confirmed the low level of carbon formation on these catalysts. In no case, carbon nanotubes have been detected on the solids.Junta de Andalucía TEP106Ministerio de Ciencia e Innovación ENE2009-14522-C05-0

Application of the meshless procedure for the elastoplastic torsion of prismatic rods

In this paper torsion of prismatic bars considering elastic-plastic material behavior is studied. Based on the Saint-Venant displacement assumption and the Romberg-Osgood model for the stress-strain relation, the boundary value problem for stress function is formulated. In reality an area of cross section of a bar has two regions: elastic with linear governing equation and plastic with non-linear governing equation. In the solution procedure, the meshless procedure based on the Homotopy Analysis Method HAM connected with the Method of Fundamental Solutions (MFS) and Radial Basis Functions (RBF) is applied. The considered nonlinear partial differential equation (PDE) is transform into a hierarchy of linear inhomogeneous PDEs. The accuracy of the obtained approximate solution is controlled by the number of components of the calculate solution, while the convergence of the process is monitored by an additional parameter of the method. The advantage of the proposed meshless approach is that it does not require the generation of a mesh on the domain or its boundary, but only using a cloud of arbitrary located nodes