Hibridación y resistencia cultural: estudio de recepción mediática del grupo musical Generación Tsáchila

Los estudios de recepción en América Latina, así como en Ecuador, han transitado principalmente por dos caminos. Por una parte, el estudio de las audiencias como espectadores o públicos de medios masivos como radio, televisión y prensa, incluyendo en algunos casos con el análisis de los emisores y contenidos de los mensajes. Otras investigaciones, en cambio, tienen que ver con los estudios de mediaciones socio-culturales y de la recepción en los campos educativo, artístico y cultural. Dentro de ese panorama, el presente trabajo es un estudio de recepción mediática entre los integrantes del grupo musical Generación Tsáchila, integrado por miembros de esa nacionalidad indígena. Es decir, esta investigación esta direccionada en la segunda de las líneas antes mencionadas, y busca indagar sobre las motivaciones, apropiaciones y mediaciones que están presentes en su quehacer cultural. Así también, tomando en cuenta que a este grupo musical lo conforman personas de varias edades y que pertenecen a esta comunidad indígena, se pretende identificar cuáles son los procesos de hibridación cultural y cómo se manifiestan, así como cuáles son las formas de resistencia cultural entre los miembros de la agrupación, respecto a los valores culturales de la comunidad. De esta manera la indagación busca comprender las audiencias y el contexto: los consumos culturales, las mediaciones que intervienen, sus imaginarios, las matrices culturales que los constituyen, entre otros aspectos del proceso de recepción. Para ello, como guías teóricas en este estudio se han utilizado el enfoque crítico, el modelo de mediaciones de Jesús Martín Barbero, los estudios de recepción de Guillermo Orozco y la propuesta de culturas híbridas de Néstor García Canclini, entre las principales. Así también, para ejecutar este estudio se plantea un marco teórico que problematiza las prácticas de usos y consumo de los medios y de los hipermedios, donde a la recepción se la ubica como una actividad social y como un acto de producción de significaciones. El trabajo refleja la cotidianidad, las formas de vida, las motivaciones y mediaciones de los integrantes del grupo musical Generación Tsáchila

Tripod-shaped penta (p-phenylene)s for the functionalization of silicon surfaces

In order to obtain nanostructured thin films to be used in biosensor devices, several chemical functionalization methods have been developed, such as Click chemistry or Suzuki carbon-carbon coupling reactions on surfaces.1 With the aim to control the orientation and spacing between grafted functional groups on a surface, tripodal oligo (p-phenylene)s have become the ideal anisotropic adsorbates due to their shape-persistent and self-standing characteristics.2 Here we report the synthesis and characterization of several tripod-shaped oligo(p-phenylene)s molecules with legs composed of five phenylene units, compounds 1, 2 and 3. In these structures, each leg is end-capped with an NH-Boc, NH2 and N3 group, respectively. The functional arm contains an acetylene group. The presented synthesis has as key step the Pd-catalyzed Suzuki cross-coupling reaction. In particular, a iodine derivative from the silicon core molecule reacts with the appropriate tetra(p-phenylene) boron derivative, thus generating the final tripod-shaped structure. The azide end-capped leg in 3 is specifically designed for its covalent incorporation on alkynyl terminated silicon surfaces by an easy and reproducible way. As a preliminary study, we present the alkynyl-functionalized silicon wafers nanostructuration with tripod 3 through the cooper catalyzed alkyne-azide cycloaddition (CuAAC) click reaction.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Análisis de los mutantes de la región pre-core del virus B de la hepatitis

Tesis de la Universidad Complutense de Madrid, Facultad de Ciencias Biológicas, leída el 11-06-1998Se ha desarrollado un método específico para la detección del virus B de la hepatitis (VBH) de tipo salvaje y de los mutantes en la región pre-core. Este método se aplicó para el análisis de la distribución de las variantes del VBH en la región pre-core en muestras de suero e hígado de pacientes no tratados y en muestras de suero de pacientes asintomáticos y de pacientes tratados con interferón (IFN) o con predniso-e IFN. La mayoría de los pacientes estaban infectados en suero y en hígado por la mezcla de tipo salvaje y mutante, existiendo una concordancia en la distribución en ambos compartimentos. Se ha demostrado que la presencia del mutante no está relacionada con un agravamiento de la enfermedad ni tampoco con una peor respuesta al IFN. En los pacientes tratados con prednisona e IFN, la proporción de mutante tiende a disminuir durante el tratamiento con prednisona, mientras que esta proporción tiende a aumentar durante el tratamiento con IFNFac. de Ciencias BiológicasTRUEpu

Coavaluació de competències genèriques: una experiència d'aplicació als estudis d'enginyeria industrial i enginyeria aeronàutica

L’activitat consisteix en fer una presentació oral d’uns 15-20 minuts de durada, dins d’una sessió de teoria de meitat de quadrimestre, a les assignatures corresponents i cap a la resta de companys de classe i aquests, en base a una plantilla amb tres criteris d’avaluació, generen feedback sobre aquestes presentacions. Al mateix temps, dos professors de l’assignatura, normalment el coordinador i un altre professor de suport a la teoria, desenvolupen una avaluació individual (en base a una plantilla de disset criteris) sobre cadascun dels “ponents” i els envien un informe personalitzat amb els aspectes millorables de la seva exposició.Peer Reviewe

Elección coherente de los formatos de digitalización de la documentación del paciente

Document scanning is being implemented currently in the management of patients in the hospital environment to translate the document with signatures, handwritten notes, etc. We must have computer knowledge in terms like pixels, resolutions, compression, etc, to choose correctly the storage images. The applicative Web technology is developed showing the images embedded in the same window. The scanners used for digitizing documents can set software profiles with the storage features of TIFF files. Format errors in resulting files were analyzed using free software utilities for processing Tiffs.127,461 documents were checked with an average of 2 pages (standard deviation 2) and with an error rate in compression or resolution of 1.9%. The types of errors was related to the document type and complexity (chi-square pActualmente en la gestión de pacientes en el entorno Hospitalario se está implantando la digitalización de documentos, para plasmar los consentimientos con sus firmas, anotaciones manuscritas, etc. Debemos tener conocimientos informáticos en cuanto a píxeles, resoluciones, compresión, etc., para escoger acertadamente la tecnología de almacenamiento.El sistema de gestión documental está compuesto por una base de datos SQL donde se almacenan los descriptores de las imágenes capturadas. El aplicativo está desarrollado en tecnología Web mostrando las imágenes embebidas en la misma ventana. Los escáneres utilizados para obtener los documentos digitalizados permitían configurar por software perfiles con las características de almacenamiento de los archivos TIFF. Se analizaron los errores del formato de almacenamiento informático mediante herramientas de software libre. Se comprobaron 127461 documentos con una media de 2 páginas (desviación estándar 2) y con un porcentaje de errores en compresión o resolución del 1,9%. El tipo de errores estaba relacionado con el tipo de documento y su complejidad (prueba chi-cuadrado

Impact of SAR image resolution on the performance of the amplitude dispersion optimization for polarimetric persistent scatterer interferometry

Polarimetric persistent scatterer interferometry (PolPSI) takes advantage of polarimetric optimization algorithms that enhance interferograms’ phase quality by adequately combining the available polarization channels (e.g., HH, VV, HV, and VH) into an improved one. Amplitude dispersion ( DA ) is one of the commonly used phase quality metrics for this optimization. The resolution of the images is supposed to have an impact on the performance of DA -based PolPSI in terms of both pixel density and quality. In this research, this impact is investigated. Specifically, 30 quad-pol RADARSAT-2 images over Barcelona with a resolution around 5 m in both range and azimuth are employed to generate additional data sets with degraded resolutions, ranging from 7.5 to 20 m. The results confirm that, in all cases, the ability of DA to select high-quality pixels, i.e., persistent scatterers, decreases when the spatial resolution worsens because the loss of resolution increases the number of scatterers present in a resolution cell. In addition, it would be expected that the performance of the polarimetric optimization of DA would tend to decrease when the spatial resolution worsens. However, for all employed resolutions, the polarimetric optimization improves the density and quality of PSs with respect to that of any single polarimetric channel. Moreover, this improvement is more noticeable, in relative terms, as the image resolution degrades.This work was supported in part by the Spanish Ministry of Economy, Industry and Competitiveness (MINECO), the State Research Agency (AEI) and the European Funds for Regional Development (EFRD) under Project TEC2017-85244-C2-1-P and Project TEC2017-85244-C2-2-P, in part by the National Natural Science Foundation of China under Grant 42004011 and Grant 41874044, in part by the China Postdoctoral Science Foundation under Grant 2020M671646, in part by the Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions (Science and Technology of Surveying and Mapping), and in part by the CommSensLab, which is Unidad de Excelencia Maria de Maeztu MDM-2016-0600 financed by the AEI, Spain.Peer ReviewedPostprint (author's final draft

Considerations on the non-active power using geometric algebra

Several approaches have been developed to define the non-active power concept under nonsinusoidal situations in electrical systems. Nevertheless, these contributions do not provide a complete and satisfactory solution to the non-active power reversibility between frequency domain and time domain. This paper presents a non-active power multivector concept, based on an original vector space frequency-domain approach that bridges the gap between both domains. The suggested correspondence can provide a convenient descriptive language to reconcile Fryze’s instantaneous non-active power with Budeanu´s deactive-power

Data-independent Random Projections from the feature-map of the homogeneous polynomial kernel of degree two

[EN] This paper presents a novel non-linear extension of the Random Projection method based on the degree-2 homogeneous polynomial kernel. Our algorithm is able to implicitly map data points to the high-dimensional feature space of that kernel and from there perform a Random Projection to an Euclidean space of the desired dimensionality. Pairwise distances between data points in the kernel feature space are approximately preserved in the resulting representation. As opposed to previous kernelized Random Projection versions, our method is data-independent and preserves much of the computational simplicity of the original algorithm. This is achieved by focusing on a specific kernel function, what allowed us to analyze the effect of its associated feature mapping in the distribution of the Random Projection hyperplanes. Finally, we present empirical evidence that the proposed method outperforms alternative approaches in terms of pairwise distance preservation, while being significantly more efficient. Also, we show how our method can be used to approximate the accuracy of non-linear classifiers with efficient linear classifiers in some datasets

Compact bilinear pooling via kernelized random projection for fine-grained image categorization on low computational power devices

[EN]Bilinear pooling is one of the most popular and effective methods for fine-grained image recognition. However, a major drawback of Bilinear pooling is the dimensionality of the resulting descriptors, which typically consist of several hundred thousand features. Even when generating the descriptor is tractable, its dimension makes any subsequent operations impractical and often results in huge computational and storage costs. We introduce a novel method to efficiently reduce the dimension of bilinear pooling descriptors by performing a Random Projection. Conveniently, this is achieved without ever computing the high-dimensional descriptor explicitly. Our experimental results show that our method outperforms existing compact bilinear pooling algorithms in most cases, while running faster on low computational power devices, where efficient extensions of bilinear pooling are most useful

Study and characterization of modified silicon surfaces with organic molecules

Nanostructured thin films and subsequent biofunctionalization of silicon substrates are essential for the development of biosensors devices. The formation of organic monolayers on silicon substrates via Si-C bound allows specific interactions with biomolecules and presents several advantages like greater detection sensitivity and stability against hydrolytic cleavage.1 In this sense, to control the orientation and spacing between grafted functional moieties on the surface, tripodal oligo (p-phenylene)s have become ideal anisotropic adsorbates due to their shape-persistent and selfstanding characteristics.2 On the other hand, biomolecules such as tehtahydro[3]benzazepines are well-known to contain in their structure a phenetylamine skeleton, which is also present in dopaminergic receptors and drugs, therefore these molecules have a remarkable interest in medicinal chemistry. Here we report the synthesis and characterization of several tetrahydro[3]benzazepines and tripod-shaped oligo(p-phenylene)s which were suitably functionalized for its subsequent adsorption on silicon surfaces by hydrosilylation and/or CuAAc click reaction. X-ray photoemission spectroscopy (XPS) and atomic force microscopy (AFM) analysis were also carried out to reveal the presence of the grafted molecules on the different Si surfaces.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech