The altarpiece of the Chapel of the Magdalena in the Royal Collegiate Church of San Isidoro de Leon: promotion and patronage of the ruler Francisco Diaz de Quiñones

Los testamentarios del regidor leonés Francisco Díaz de Quiñones (†1613) establecen que por disposición testamentaria “se hiciese un retablo de talla y pintura para la capilla donde está enterrado en el claustro del Señor Sant Isidro el Real desta ciudad”. El presente testimonio documental constituye el punto de partida de una investigación en la que se reconstruye la labor de promoción y mecenazgo llevada a cabo en una de las capillas de la panda este del claustro isidoriano por parte de una de las familias nobiliarias más señeras de la ciudad de León durante la Edad Moderna.The testamentaries of the regent Francisco Díaz de Quiñones († 1613) establish that by testamentary provision “an altarpiece of carving and painting for the chapel where it is buried in the cloister of Lord Sant Isidro the Real of this city was made”. The present documentary testimony constitutes the starting point of an investigation in which the work of promotion and patronage is reconstructed in one of the chapels of the eastern panda of the Isidorian cloister by one of the most noble families in the city of León during the Modern Age

Diseño de una aplicación paralela de segmentación de imágenes basada en Corba

In computer vision, segmentation refers to the process of partitioning a digital image into multiple segments. This process involves a high consumption of resources, both memory and CPU. Therefore, these applications are specially suited for HPC (High-performance computing) environments. Nowadays, a wide variety of methods and algorithms have been available recently to deal with the trouble of the segmentation of images, one of them is used in this project that was called PSRG. This algorithm was designed to be executed parallel. Parallel executions use MPI for performing the data distribution. We have considered interesting to enable these simulations on machines with different architectures and distributed over wide area networks, allowing them to run on heterogeneous architectures and/or operative systems. To achieve it, we started this project with an implementation of a CORBA−based communications library. Once the development finished, we proceed to evaluate the performance of this new version of PSRG.Ingeniería en Informátic

Influence of a LED curing unit beam homogenization tip on the top and bottom microhardness of composite resins

Orientador: Marcelo GianniniDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de PiracicabaResumo: O objetivo do estudo foi avaliar o efeito de diferentes pontas transmissoras de luz de um aparelho fotoativador na microdureza da superfície e da base de resinas compostas convencionais e do tipo bulk-fill, que contem diferentes fotoiniciadores como canforoquinona, Lucirin-TPO ou Ivocerin. Adicionalmente, foi analisado o perfil do feixe de luz emitido por cada ponta. Foi usado um aparelho fotoativador LED polywave Bluephase Style (Ivoclar Vivadent AG) e duas pontas transmissoras de luz desenhadas para uso nesse aparelho, uma ponta regular (RT) com emitância de 935 mW/cm2 e uma ponta homogeneizadora (HT), com emitância de 851 mW/cm2. Foram testadas duas resinas convencionais (Herculite Ultra, Kerr Corp (HER), e Tetric EvoCeram, Ivoclar Vivadent AG (TEC)) e duas resinas tipo bulk-fill (SonicFill, Kerr Corp (SOF). e Tetric EvoCeram Bulk Fill, Ivoclar Vivadent AG (TBF)). Foram fabricados corpos de prova em formato de disco, com 10mm de diâmetro e 2mm de espessura no caso das resinas convencionais, e 4mm de espessura para as resinas bulk-fill. Os discos foram polimerizados o tempo indicado pelos fabricantes, mantendo o aparelho fotoativador em uma posição fixa. A posição de saída da luz emitida por cada um dos três LED do aparelho fotoativador (sendo que dois chips emitem luz azul com um pico de emissão de 456nm, o terceiro chip produz luz violeta com um pico de 409nm) foi sinalizada na ponta e marcada nos discos, como referência para as medições posteriores. Foi medida a microdureza superficial Knoop (KHN), do topo e da base de cada disco, no ponto central de incidência da luz emitida por cada chip. Os dados da caracterização da luz foram analisados com um teste t de Student. Os dados de microdureza foram analisados com ANOVA de 3 fatores (LED, topo ou base, e tipo de ponta; 'alfa'= 0.05). As imagens do perfil de feixe de luz demostraram melhor distribuição da luz na ponta transmissora, quando foi usada a HT. O uso da HT também resultou em uma diminuição da microdureza de HER nas posições associadas aos LED azuis na base dos discos, mas não produz diferença no topo. Em TEC, o uso da HT aumentou a microdureza no topo nas regiões dos três LED. O uso da HT produz um aumento na microdureza de SOF na posição de um dos LED azuis, e do LED violeta, na base, e em TBF aumentou a dureza do topo nas posições de todos os LED. Em todas as resinas testadas, a dureza media da superfície dos discos foi maior, do que na base. De maneira geral, a dureza foi maior nas regiões dos LED azuis, do que na região do LED violeta, tanto no topo, quanto nas bases dos discos, independentemente da ponta transmissora usada. Os resultados sugerem que o uso da ponta homogeneizadora pode aumentar a microdureza da superfície de resinas compostas que apresentam fotoiniciadores alternativos, mas o efeito é perdido na base do materialAbstract: The purpose of this study was to evaluate the effect of a light guide (regular or homogenizing) from a light curing unit (LCU) on the top and bottom microhardness of conventional and bulk-fill composites disks, and to analyze the beam profile produced by each light guide. A polywave LED LCU Bluephase Style (Ivoclar Vivadent AG) with two different light guides were used: a regular tip (RT), with an emittance of 935 mW/cm2, and a homogenizer tip (HT), with an emittance of 851 mW/cm2.Two conventional composites (Herculite Ultra (HER), Kerr Corp and Tetric EvoCeram (TEC), Ivoclar Vivadent AG) and two bulk-fill composites (SonicFill (SOF), Kerr Corp and Tetric EvoCeram Bulk Fill (TBF), Ivoclar Vivadent AG). Disk-shaped composite samples, with a 10 mm diameter and 2 mm thickness for conventional composites and 4 mm thickness for bulk-fill composites were prepared. Samples were light cured according to the manufacturers recommended times, keeping the LCU in a fixed position, with external marks in the light guides to determine the areas for hardness measurements, which corresponded to the location of the three LED chips, emitting blue and violet light (two chips with emission peak at 456nm and one chip at 409nm). Knoop microhardness was measured at the top and bottom surface of each specimen in the central in irradiance spot of each chip. Microhardness data for each composite was analyzed by 3-way ANOVA ('alpha'=0.05). Beam profile images showed better light distribution across the surface of the light guide when HT was used. Using HT decreased microhardness of HER at the position of the blue LED chips at base of the sample but had no effect at the top surface. For TEC, use of HT increased microhardness of the three LED areas at the top surface. Use of the HT increased microhardness of SOF at the position of one of the blue and the violet LED chips at the bottom surface, and for TBF, HT increased the microhardness in all the top surface. All the tested composites showed a higher mean microhardness at top than that at the bottom of the samples. In general, all composites presented a higher microhardness at the blue LED areas, regardless of the surface or the used tip. Results suggest that using a homogenizer light guide may increase the microhardness at the top of composite resins containing alternative photoinitiators; however, that effect is not the same at the bottom of the materialMestradoDentísticaMestre em Clínica Odontológic

Optimum Selection of DNN Model and Framework for Edge Inference

This paper describes a methodology to select the optimum combination of deep neuralnetwork and software framework for visual inference on embedded systems. As a first step, benchmarkingis required. In particular, we have benchmarked six popular network models running on four deep learningframeworks implemented on a low-cost embedded platform. Three key performance metrics have beenmeasured and compared with the resulting 24 combinations: accuracy, throughput, and power consumption.Then, application-level specifications come into play. We propose a figure of merit enabling the evaluationof each network/framework pair in terms of relative importance of the aforementioned metrics for a targetedapplication. We prove through numerical analysis and meaningful graphical representations that only areduced subset of the combinations must actually be considered for real deployment. Our approach can beextended to other networks, frameworks, and performance parameters, thus supporting system-level designdecisions in the ever-changing ecosystem of embedded deep learning technology.Ministerio de Economía y Competitividad (TEC2015-66878-C3-1-R)Junta de Andalucía (TIC 2338-2013)European Union Horizon 2020 (Grant 765866

Gender differences in e-learning satisfaction

In line with recent research, the question this paper raises is whether or not gender differences also exist in e-learning. This study is based on a sample of 1,185 students who are doing on-line courses at the Universidad de Granada in Spain. The main conclusion is that female students are more satisfied than male students with the e-learning subjects that make up the sample. Furthermore, we find that female students assign more importance to the planning of learning, as well as to being able to contact the teacher in various ways.: Gender Studies; Evaluation Methodologies

El éxito de las casas comerciales en Chile: ¿Regulación o buena gestión?

In this article we look at factors that could explain why department stores in Chile provide extensive financial services to their customers, and compare this situation with that in other countries. We believe that the success of department stores in Chile responds to several factors acting simultaneously; for example, asymmetric enforcement of financial regulations (stricter towards the banking industry), low bankarization, and good management. Consistent with a model of oligopolistic competition, neither can we discard the hypothesis that the rapid expansion of the department stores’ credit services is in part due to the banking industry’s little interest in extending their credit service, at least during the early years, to lower-income customers because of the externality that this would have imposed on existing customers. The available data makes it impossible to rank the importance of all these factors partly because they work together.

La presencia del presidente de la Comisión Jean Claude Juncker en las redes sociales. ¿Un ejercicio de transparencia y rendición de cuentas a la ciudadanía?

Desde 2007, en correlación con la Crisis Económica y Financiera actual, existe una cierta desafección ciudadana hacia las Instituciones Europeas. A esto le añadimos que, debido a la utilización de los procesos electorales y consultas populares europeos como un ejercicio de castigo a sus gobiernos nacionales. Eso sucedió en los casos de el rechazo de la Constitución Europea en los referéndums de Francia y Holanda y en la caída en la participación de las Elecciones Europeas de 2009. Ante ese problema y la escasa presencia de la actualidad de las Instituciones Europeas en los medios los dirigentes europeos comprendieron la necesidad de dar a conocer mejor Europa y de crear un Espacio Público Europeo que incluyese Blogs, Redes Sociales y Web 2.0. Dentro de esa idea de acercar más Europa, en 2014 asistimos a las primeras elecciones europeas en las que se presentaron diferentes candidatos a presidir la Comisión por los diferentes partidos políticos europeos. Unas elecciones en las que los candidatos hicieron una fuerte campaña en las Redes Sociales y en las que resultó ganador el Partido Popular Europeo. Y esto propició que su candidato, Jean Claude Juncker, sea el actual presidente de la Comisión Europea

H+K+ exchange in reconstituted yeast plasma membrane vesicles

AbstractThe activity of a putative H+K+ exchange system in the plasma membrane of yeast was studied following the alkalinization of the interior of vesicles prepared with lecithin and yeast plasma membrane containing pyranine entrapped inside. The fluorescence of pyranine was used as an indicator of the internal pH of the vesicles. The addition of monovalent cations produced an increase of the internal pH, probably due to the activity of an exchange system, allowing H+ to leave the vesicle in an exchange for the cation added. The system showed partial selectivity towards K+ against other monovalent cations, and it was inhibited by amiloride. The activity of this system required the presence of the yeast plasma membrane in the vesicles, and it did not produce important changes of the membrane potential of the vesicles. The exchange depended partially on the relative values of the internal and the external pH of the vesicles. The system shows low affinity for the cations, and appears to be different from the mitochondrial H+K+ exchange system, which is non-selective toward the different monovalent cations. This system could be involved in the regulation of the internal pH of the cells when they accumulate high concentrations of K+