465 research outputs found

    Values learning througth tales in chilhood education

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    The learning of values established in today’s society is vital for the growth of the individual in a way that today is a premium in the community in which their live. Their learning is dependent at previous train, which it begins in childhood education level. In the other hand, teaching at this level is supported on the reading of traditional tales, which has a great representation of the values socially accepted today, hence that education in values had a great relevant and needs a study in this School level. By a ex post facto study, used a descriptive an comparative-casual design, be presented the opinion of teachers and pre-service teachers on this academic level in the Cordoba province (N = 411), about if the value of cooperation and/or mutual help can be learned by the children through the tales and used of traditional methodologies. Through the application a questionnaire create ad hoc conformed with 19 tales and 5 values, according to classification made by Marín and Sánchez (2015) and used a scale to scale type Likert to answered, where 1 was totally disagree and 5 totally in disagreement, it preceded the collection of data. The principal results are the younger teachers consider that all the tales offered (19) are valid to learn this value. In consequence we can question, if lack of professional experience can be an element that determines the use of traditional methodologies for the learning of this particular value and all in general.</p

    Values education and traditional stories in early childhood education

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    Los valores son hoy un elemento de la formación, siendo pieza clave en la Educación Infantil. Junto a estos encontramos la metodología de los cuentos tradicionales como forma de enseñanza-aprendizaje. En el presente artículo exponemos los primeros resultados de un estudio no experimental, llevado a cabo con el objetivo general de conocer cuáles son los valores que el profesorado cree que transmiten los cuentos infantiles. El principal resultado obtenido es que los cuentos tradicionales transmiten diferentes valores en función de la etapa educativa en que se empleen y de la experiencia profesional de los sujetos docentes. Concluimos que la educación en valores a través de los cuentos tradicionales en la etapa de Educación Infantil, es una metodología válida para la socialización de los niños y las niñasNowadays values are an important element of education and represent a key component of Early Childhood Education. In addition, traditional stories are used in teaching and learning methodologies. This article describes the initial results of a non-experimental study that had the general objective of identifying the values that teachers believe are transmitted by traditional stories for children. The main result obtained was that traditional stories and fairytales transmit different values depending on the educational stage of the students and the professional experience of teachers. The study concludes that values education through traditional stories in early childhood education is a valid methodology to facilitate the socialization of childre

    Multi-scale multireference configuration interaction calculations for large systems using localized orbitals: Partition in zones

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    A new multireference configuration interaction method using localised orbitals is proposed, in which a molecular system is divided into regions of unequal importance. The advantage of dealing with local orbitals, i.e., the possibility to neglect long range interaction is enhanced. Indeed, while in the zone of the molecule where the important phenomena occur, the interaction cut off may be as small as necessary to get relevant results, in the most part of the system it can be taken rather large, so that results of good quality may be obtained at a lower cost. The method is tested on several systems. In one of them, the definition of the various regions is not based on topological considerations, but on the nature, σ or π, of the localised orbitals, which puts in evidence the generality of the approac

    Characterization of 3d printing filaments applied in restoration of sensitive archaeological objects using rapid prototyping

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    [EN] Purpose The purpose of this paper is to characterize three-dimensional (3D) printing filaments commonly used in fused deposition modeling (FDM) to determine their viability for restoration and conservation treatments. Design/methodology/approach Eight current filaments for FDM from six polymeric materials have been characterized to determine their suitability for restoration and conservation treatments. For testing these filaments, specimens are printed with acrylonitrile-butadiene-styrene; polylactic acid; polylactic acid with CaCO3 (E.P.); polyethylene terephthalate glycol; polypropylene; and high-impact polystyrene. Suitability of a filament was verified using the Oddy test by detecting the action of volatile pollutants released from the filaments. The morphological and color changes were observed after allowing them to degrade under the exposure of UV radiation. The samples were then analyzed using Fourier-transform infrared spectroscopy. In addition, gas chromatography-mass spectroscopy technique was applied to complete the characterization of the printed filaments. Findings Materials investigated are suitable for restoration purposes ensuring long-term stability. Rapid prototyping using FDM is appropriate for restoring sensitive archaeological objects allowing reconstruction of parts and decreasing risk while manipulating delicate artifacts. Originality/value Rapid prototyping using FDM was chosen for the restoration of a fragile and sensitive archaeological glass bowl from Manises Ceramic Museum.This work is supported by the Spanish Ministry of Economy, Industry and Competitiveness and the European Regional Development Fund (ERDF), in the context of the research project "Desarrollo de un Sistema Integrado de Restauracion, Recomposicion, Restitucion y Representacion de Fragmentos Arqueologicos": HAR2015-69408-R (MINECO-FEDER).Aura-Castro, E.; Díaz-Marín, C.; Mas-Barberà, X.; Sánchez López, M.; Vendrell Vidal, E. (2021). Characterization of 3d printing filaments applied in restoration of sensitive archaeological objects using rapid prototyping. Rapid Prototyping Journal. 27(4):645-657. https://doi.org/10.1108/RPJ-06-2019-0153S64565727

    Reconfigurable Resonator in Decoupled Empty SIW Technology Using Liquid Crystal Material

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    "This paper is a postprint of a paper submitted to and accepted for publication in Electronics Letters and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at IET Digital Library"[EN] This paper presents a novel continuously tunable microwave resonator based on Liquid Crystal (LC) material. The reconfigurable device is implemented in Decoupled Empty Substrate Integrated Waveguide (DESIW) technology. DESIW technology allows both magnetic and electric DC (or low frequency) biasing of the LC. The resonator is continuously tunable in a range of 600 MHz, resulting in a measured tunability range of 8.5% around a centre frequency of 7 GHz. Moreover, the measured insertion loss of the reconfigurable device is between 4.3 dB and 6.8 dB, thus obtaining a Q-factor of 190-172.This work was partially funded by the Generalitat Valenciana research project PROMETEOII/2015/005, by the Ministerio de Educación, Cultura y Deporte (Spain) under the Fellowship Program for Training University Professors FPU14/00150, and by Ministerio de Economía y Competitividad (Spain) under R&D project TEC2016-75934-C4-1-R.Sánchez-Marín, JR.; Bachiller Martin, MC.; Nova-Giménez, V.; Boria Esbert, VE. (2019). Reconfigurable Resonator in Decoupled Empty SIW Technology Using Liquid Crystal Material. Electronics Letters. 55(16):907-910. https://doi.org/10.1049/el.2019.1088S9079105516Sekar, V., Armendariz, M., & Entesari, K. (2011). A 1.2–1.6-GHz Substrate-Integrated-Waveguide RF MEMS Tunable Filter. IEEE Transactions on Microwave Theory and Techniques, 59(4), 866-876. doi:10.1109/tmtt.2011.2109006Adhikari, S., Ban, Y.-J., & Wu, K. (2011). Magnetically Tunable Ferrite Loaded Substrate Integrated Waveguide Cavity Resonator. IEEE Microwave and Wireless Components Letters, 21(3), 139-141. doi:10.1109/lmwc.2010.2102746Prasetiadi, A. E., Karabey, O. H., Weickhmann, C., Franke, T., Hu, W., Jost, M., … Jakoby, R. (2015). Continuously tunable substrate integrated waveguide bandpass filter in liquid crystal technology with magnetic biasing. Electronics Letters, 51(20), 1584-1585. doi:10.1049/el.2015.2494Yaghmaee, P., Fumeaux, C., Bates, B., Manabe, A., Karabey, O. H., & Jakoby, R. (2012). Frequency tunable S-band resonator using nematic liquid crystal. Electronics Letters, 48(13), 798. doi:10.1049/el.2012.1366Sánchez, J. R., Bachiller, C., Esteban, H., Belenguer, A., Nova, V., & Boria, V. (2017). New decoupled empty substrate integrated waveguide realisation. Electronics Letters, 53(17), 1203-1205. doi:10.1049/el.2017.1240Yang, D.-K., & Wu, S.-T. (2006). Fundamentals of Liquid Crystal Devices. doi:10.1002/0470032030Belenguer, A., Esteban, H., & Boria, V. E. (2014). Novel Empty Substrate Integrated Waveguide for High-Performance Microwave Integrated Circuits. IEEE Transactions on Microwave Theory and Techniques, 62(4), 832-839. doi:10.1109/tmtt.2014.2309637Munk, B. A. (2000). Frequency Selective Surfaces. doi:10.1002/0471723770Esteban, H., Belenguer, A., Sanchez, J. R., Bachiller, C., & Boria, V. E. (2017). Improved Low Reflection Transition From Microstrip Line to Empty Substrate-Integrated Waveguide. IEEE Microwave and Wireless Components Letters, 27(8), 685-687. doi:10.1109/lmwc.2017.272401

    Controlled Out-of-Band Rejection of Filters based on SIW with Alternating Dielectric Line Sections

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    © 2019 IEEE. Personal use of this material is permitted. Permissíon from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertisíng or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.[EN] A study for managing the out-of-band rejection in a new topology of filters based on substrate integrated waveguide with alternating dielectric line sections (ADLSs) is presented in this letter. ADLS is a filtering structure consisting on line sections of the same width but with alternating air and dielectric filling. The design of the lengths of each section provides the central frequency and the bandwidth of bandpass filter response. The proper selection of the structure substrate dielectric permittivity can increase the rejection band up to 2 f(o). Moreover, the selection of the filter order (i.e., the number of sections with and without dielectric) can affect the depth of the rejection band. A study of the width and the depth of the rejection band is performed with different permittivities and orders for two different filters. Then, for validation purposes, the prototypes of both filters have been manufactured and measured.This work was supported in part by the Generalitat Valenciana Research Project under Grant PROMETEOII/2015/005, in part by the Ministerio de Educacion, Cultura y Deporte, Spain, through the Fellowship Program for Training University Professors under Grant FPU14/00150, and in part by the Ministerio de Economia y Competitividad, Spain, through Research and Development Project under Grant TEC2016-75934-C4-1-R.Sánchez-Marín, JR.; Bachiller Martin, MC.; Nova-Giménez, V.; Boria Esbert, VE. (2019). Controlled Out-of-Band Rejection of Filters based on SIW with Alternating Dielectric Line Sections. IEEE Microwave and Wireless Components Letters. 29(4):258-260. https://doi.org/10.1109/LMWC.2019.2902034S25826029

    Efficiency strategies in building conservation in natural protected areas: the experience of Doñana

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    Es notable la cantidad de edificaciones que han existido y existen en Doñana. Estas construcciones, muy diversas, exponen la identidad del lugar. Han desaparecido algunas de ellas; otras se hallan en un proceso de degradación que nos hace plantearnos la cuestión de la conservación de lo construido en un medio natural singular. En el presente trabajo, se recopila, actualiza y completa la información disponible sobre el estado actual del patrimonio edificado de Doñana y se analiza la estructura de implantación de las edificaciones. Se comprueba cómo ha evolucionado la edificación en el Parque a lo largo de la historia, en qué estado ha llegado hasta nuestros días, cómo ha servido al hombre de este entorno, de qué manera ha desempeñado sus funciones básicas de cobijo y protección del hombre y cómo podrían afrontar su futuro, en torno a las mismas estrategias de eficiencia que las han hecho sobrevivir hasta hoy.It is remarkable the amount of buildings that have existed and still exist in Doñana. These constructions, which are very diverse, are examples of the local identity. Some have been lost, but others are in a process of degradation that raises the question of building conservation in a unique natural environment. In this paper, the available information on the current state of the Doñana built heritage is compiled, updated and completed. The geographical distribution structure of the buildings’ locations is also analyzed. This study verifies how these buildings have evolved throughout the park history to the condition we see now, how they have been useful to their inhabitants in this environment, how they have performed their roles of sheltering and protecting men, and how they could face the future using the same strategies they have developed to survive until our day

    Caracterización de un contador proporcional de flujo de gas para la determinación de contenido alfa y beta en muestras ambientales. Comparación de resultados con otras técnicas

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    El procedimiento habitual para la determinación de los índices de actividad alfa total y beta total en suelos, consiste en depositar una determinada cantidad de muestra sobre una plancheta de acero inoxidable, disolver con ácido nítrico y llevar a sequedad. La posterior medida se realiza mediante un sistema de centelleo sólido de ZnS(Ag) (medida del índice de actividad alfa total) o un contador proporcional (medida de los índices de actividad alfa y/o beta total). En este trabajo se presenta la puesta a punto del contador proporcional de muy bajo fondo (Berthold LB 770 B) para la medida simultánea de los índices de actividad alfa total y beta total. Para ello se han determinado fondos, eficiencias, "spillover" y voltajes óptimos de trabajo para la medida en modo simultáneo. El modo simultáneo de contaje presenta características similares al secuencial, pero se seleccionó este modo de trabajo porque permite obtener resultados análogos en la mitad de tiempo. Además se determinaron, las curvas de autoabsorción para cada uno de los índices (alfa y beta) y se midieron una serie de muestras ambientales (suelo) recogidas en diferentes puntos de la geografía aragonesa que se compararon con valores obtenidos en otro equipo de características similares más antiguo y en un sistema de centelleo sólido de ZnS(Ag) para la medida del índices de actividad alfa total. Se obtuvieron resultados similares con cada uno de los equipos, aunque la incertidumbre y la actividad mínima detectable obtenida en el caso del contaje alfa fue superior con el contador proporcional

    Improved low reflection transition from microstrip line to empty substrate integrated waveguide

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    "© 2017 IEEE. Personal use of this material is permitted. Permissíon from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertisíng or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works."[EN] Substrate-integrated waveguides (SIWs) maintain the advantages of planar circuits (low loss, low profile, easy manufacturing, and integration in a planar circuit board) and improve the quality factor of filter resonators. Empty substrateinte-grated waveguides (ESIWs) substantially reduce the insertion losses, because waves propagate through air instead of a lossy dielectric. The first ESIW used a simple tapering transition that cannot be used for thin substrates. A new transition has recently been proposed, which includes a taper also in the microstrip line, not only inside the ESIW, and so it can be used for all substrates, although measured return losses are only 13 dB. In this letter, the cited transition is improved by placing via holes that prevent undesired radiation, as well as two holes that help to ensure good accuracy in the mechanization of the input iris, thus allowing very good return losses (over 20 dB) in the measured results. A design procedure that allows the successful design of the proposed new transition is also provided. A back-to-back configuration of the improved new transition has been successfully manufactured and measured.This work was supported in part by the Ministerio de Economia y Competitividad, Spanish Goverment, under Grant TEC2013-47037-C05-3-R and Grant TEC2013-47037-C05-1-R, and in part by the Ministerio de Educacion, Cultura y Deporte under the Fellowship Program for Training University Professors under Grant FPU14/00150.Esteban González, H.; Belenguer, Á.; Sánchez-Marín, JR.; Bachiller Martin, MC.; Boria Esbert, VE. (2017). Improved low reflection transition from microstrip line to empty substrate integrated waveguide. IEEE Microwave and Wireless Components Letters. 27(8):685-687. https://doi.org/10.1109/LMWC.2017.2724011S68568727

    Unravelling the impact of courtyard geometry on cooling energy consumption in buildings

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    At present, the energy used for air conditioning in buildings in urban areas accounts for over 36% of total global energy consumption. Energy efficiency has become a critical factor in the urban planning of cities worldwide. Courtyard buildings in hot cities are a prime example of the approach used in traditional vernacular architecture to mitigate the effects of extreme weather. However, given the challenge of guaranteeing accurate modelling of microclimates within these courtyards, their impact on energy demand in buildings has been routinely over-looked by energy certification tools. This work examines three empirical case studies selected in Seville city (Spain), where temperatures during the summer months are extreme. The case studies selected display distinct geometric variations, and the primary objective of the research is to assess the influence of this geometric factor on the cooling energy demand of the building indoors. To achieve this, a validated methodology combining experimental and numerical data was implemented to evaluate the energy performance of buildings with courtyards. Different simulations were conducted to detect the impact of individual courtyard features. The results show a reduction in cooling demand of 8-18% depending on the geometry of the courtyard. Analysis was also carried out on the influence of the floor level and the orientation of adjacent rooms, revealing differences of 15% and 22%, respectively. The main conclusion of the research is that the use of courtyards as functional devices, paying particular attention to their geometry, is a key factor in the cooling energy demand of buildings.13 página
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