Percepciones y expectativas de docentes y familias rurales sobre las escuelas multigrado

El objetivo de este artículo es dar a conocer las percepciones y expectativas que docentes, madres y padres de familia tienen sobre la escuela rural multigrado. Este trabajo forma parte de un estudio realizado por el proyecto CREER, que será publicado próximamente

Rexistrado de imaxes hiperespectrais baseado na transformada rápida de Fourier

Traballo Fin de Grao en Enxeñaría Informática. Curso 2014-2015O proxecto centrarase no estudo de diferentes algoritmos xa existentes para rexistro de imaxes RGB que están baseados na transformada rápida de Fourier. A raíz dese estudo seleccionaranse os máis prometedores para desenvolvelos e analizar diferentes posibilidades de aplicación destes algoritmos ás imaxes hiperespectrais, pois a súa aplicación non é directa. Investigarase tamén sobre diferentes métodos de extracción de características das imaxes hiperespectrais para así poder reducir a súa dimensionalidade e quedarnos coa información máis relevante sobre a que se realizará o rexistrado. Os algoritmos desenvolvidos serán capaces de realizar o rexistrado de dúas imaxes hiperespectrais do mesmo obxecto ou localización, facendo corresponder os diferentes puntos mediante o cálculo do ángulo de rotación, factor de escala e translación dunha imaxe respecto da outra. Estes resultados deberán ser amosados tanto numéricamente como xerar a imaxe resultante do proceso. Traballarase sobre diferentes posibilidades de aplicación destas técnicas sobre diferentes versións do algoritmo. Realizaranse numerosas probas e modificacións co fin de conseguir un bo método de rexistrado. Concluírase o traballo cunha análise dos resultados obtidos

Juez, jurisdicción y poder

La función de ejercer jurisdicción es quizá la parte más excelsa del Derecho. Decir el derecho en una situación conflictiva determinada no es un ejercicio simplista y que pueda desarrollarse sin ningún miramiento de las necesidades sociales que se exponen en un contexto explícito. El juez es el sujeto llamado a encontrar un espacio donde el derecho y la justicia puedan conciliarse o reconciliarse. De este personaje depende que el derecho sea un instrumento de equilibrio, de justicia o que termine siendo sólo norma, producto de las necesidades de un grupo minúsculo que detenta el poder. Este escrito pretende presentar una visión optimista del derecho donde el papel de la jurisdicción va más allá de la sola legalidad

HSI-MSER: Hyperspectral Image Registration Algorithm based on MSER and SIFT

Image alignment is an essential task in many applications of hyperspectral remote sensing images. Before any processing, the images must be registered. The Maximally Stable Extremal Regions (MSER) is a feature detection algorithm which extracts regions by thresholding the image at different grey levels. These extremal regions are invariant to image transformations making them ideal for registration. The Scale-Invariant Feature Transform (SIFT) is a well-known keypoint detector and descriptor based on the construction of a Gaussian scale-space. This article presents a hyperspectral remote sensing image registration method based on MSER for feature detection and SIFT for feature description. It efficiently exploits the information contained in the different spectral bands to improve the image alignment. The experimental results over nine hyperspectral images show that the proposed method achieves a higher number of correct registration cases using less computational resources than other hyperspectral registration methods. Results are evaluated in terms of accuracy of the registration and also in terms of execution timeMinisterio de Ciencia e Innovación, Government of Spain PID2019-104834GB-I00; Consellería de Cultura, Educación e Universidade (Grant Number: ED431C 2018/19 and 2019-2022 ED431G-2019/04); Junta de Castilla y León under Project VA226P20; 10.13039/501100008530-European Regional Development Fund; Ministerio de Universidades, Government of Spain (Grant Number: FPU16/03537)S

Influence of the sputtering flow regime on the structural properties and magnetic behavior of Fe-Ga thin films (Ga ∼ 30 at.%)

In this paper we analyze the structure of Fe-Ga layers with a Ga content of ∼30 at.% deposited by the sputtering technique under two different regimes. We also studied the correlation between the structure and magnetic behavior of the samples. Keeping the Ar pressure fixed, we modified the flow regime from ballistic to diffusive by increasing the distance between the target and the substrate. X-ray diffraction measurements have shown a lower structural quality when growing in the diffusive flow. We investigated the impact of the growth regime by means of x-ray absorption fine structure (XAFS) measurements and obtained signs of its influence on the local atomic order. Full multiple scattering and finite difference calculations based on XAFS measurements point to a more relevant presence of a disordered A2 phase and of orthorhombic Ga clusters on the Fe-Ga alloy deposited under a diffusive regime; however, in the ballistic sample, a higher presence of D0_3/B2 phases is evidenced. Structural characteristics, from local to long range, seem to determine the magnetic behavior of the layers. Whereas a clear in-plane magnetic anisotropy is observed in the film deposited under ballistic flow, the diffusive sample is magnetically isotropic. Therefore, our experimental results provide evidence of a correlation between flow regime and structural properties and its impact on the magnetic behavior of a rather unexplored compositional region of Fe-Ga compounds

Acceso al transporte público para personas con discapacidad en Bogotá: caso SITP

Una de las formas de acceder a los bienes y servicios sociales en las ciudades es por medio del transporte público . Este trabajo realiza el aná lisis del Sistema Integrado de Transporte Público de Bogotá – SITP -­‐ con respecto a sus condiciones de accesibilidad para la s personas con discapacidad física y sensorial, quienes son sujetos de especial protección constitucional y actualmente se consagra en el ordenamiento jurídico colombiano su derecho fundamental de acceso al transporte público. Para este aná lisis se desarro lla n tres categorías que sirven como fundamento : discapacidad, accesibilidad y progresividad; siempre en función de la aplicación del valor, principio y derecho fundamental a la igualdad. (texto tomado de la fuente)Urban public transportation allows citizens to access to the different social goods and services offered . This work analyzes the Integrated System of Public Transportation in Bogotá , SITP by its Spanish initials, regardi ng the acces s ibility for persons with physical and sensory disabilities , whom in Colombia as a minority have a special constitutional protection. Today they have an specific fundamental right of accessibility to public transportation. In addition, t he anal ysis developed in this work is based on three constitutional catego ries: disability, accessibility and progressivity; always in relati on with equality as a value, principle and fundamental right of the Colombian Politicall Constitution of 1991MaestríaDerecho Constituciona

Measure of the color of beach nourishment sands: A case study from the Belgium coast

La percepción estética de una playa como lugar de recreo está estrechamente ligada al color de la arena. Esta es una de las características más perceptibles de una playa. El color de la arena puede ser alterado después de un trabajo de reposición. Este tipo de obras son cada vez más populares ya que representan una buena herramienta para preservar las playas de la erosión. Sin embargo, se ha prestado poca (o ninguna) atención al color de la arena durante los trabajos de reposición. Los colores de las arenas de la costa belga fueron determinados en el espacio Cielab, junto con su granulometría y composición. Las coordenadas de color varían entre 50 y 60 para L*, 0,5 a 4,0 para a* y 10,5 a 16,5 para b*. La composición muestra una fracción de cuarzo dominante, seguida de fragmentos de conchas y finalmente fragmentos de roca. La granulometría es bastante homogénea, siendo la distribución de grano más estrecha para la parte este de la costa que para la costa oeste. Este trabajo describe la metodología para realizar el análisis colorimétrico en playas de arena antes de un trabajo de reposición, junto con los principales criterios de aceptación al escoger la arena adecuada para el reemplazo.The aesthetical perception of a beach as a recreational place is closely linked to the sand color. This is one of the most perceptible characteristics of a beach. Sand color can be altered after a nourishment work. This type of works is becoming more and more popular since they represent a good tool for preserving beaches from erosion. However, only little (or none) attention has been paid to sand color during nourishment works. Colors of the sands from the Belgian coast were determined in the Cielab space, together with their granulometry and composition. Color coordinates range between 50 and 60 for L*, 0.5 to 4.0 for a*, and 10.5 to 16.5 for b*. The composition shows a dominant quartz fraction, followed by shell fragments and finally rock fragments. Granulometry is rather homogeneous, being the grain distribution for the east part of the coast narrower than for the west coast. This work describes the methodology for performing colorimetric analysis in sand beaches before a nourishment work, together with the main acceptance criteria when choosing the appropriate sand for replacement

GPU Accelerated FFT-Based Registration of Hyperspectral Scenes

Registration is a fundamental previous task in many applications of hyperspectrometry. Most of the algorithms developed are designed to work with RGB images and ignore the execution time. This paper presents a phase correlation algorithm on GPU to register two remote sensing hyperspectral images. The proposed algorithm is based on principal component analysis, multilayer fractional Fourier transform, combination of log-polar maps, and peak processing. It is fully developed in CUDA for NVIDIA GPUs. Different techniques such as the efficient use of the memory hierarchy, the use of CUDA libraries, and the maximization of the occupancy have been applied to reach the best performance on GPU. The algorithm is robust achieving speedups in GPU of up to 240.6×This work was supported in part by the Consellería de Cultura, Educacion e Ordenación Universitaria under Grant GRC2014/008 and Grant ED431G/08 and in part by the Ministry of Education, Culture and Sport, Government of Spain under Grant TIN2013-41129-P and Grant TIN2016-76373-P. Both are cofunded by the European Regional Development Fund. The work of A. Ordóñez was supported by the Ministry of Education, Culture and Sport, Government of Spain, under an FPU Grant FPU16/03537S

Surf-Based Registration for Hyperspectral Images

The alignment of images, also known as registration, is a relevant task in the processing of hyperspectral images. Among the feature-based registration methods, Speeded Up Robust Features (SURF) has been proposed as a computationally efficient approach. In this paper HSI–SURF is proposed. This is a method to register hyperspectral remote sensing images based on SURF that takes advantage of the full spectral information of the images. In this sense, the proposed method selects specific bands of the images and adapts the keypoint descriptor and the matching stages to benefit from the spectral information, thus increasing the effectiveness of the registration.This work was supported in part by the Consellería de Educación, Universidade e Formación Profesional [grant numbers GRC2014/008, ED431C 2018/19, and ED431G/08] and Ministerio de Economía y Empresa, Government of Spain [grant number TIN2016-76373-P] and by Junta de Castilla y Leon - ERDF (PROPHET Project) [grant number VA082P17]. All are cofunded by the European Regional Development Fund (ERDF). The work of Alvaro Ordóñez was also supported by the Ministerio de Ciencia, Innovación y Universidades, Government of Spain, under a FPU Grant [grant number FPU16/03537