81 research outputs found

    Elementos de matemática

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    El libro "Elementos de Matemática" es una obra que fué utilizada por muchos científicos e ingenieros españoles en su formación básica en los años 50-70 del pasado siglo XX. Contiene una primera parte dedicada al Álgebra lineal, una segunda parte dedicada al Análisis infinitesimal y una tercera parte con las soluciones a los ejercicios propuestos en las anteriores. Además de por su interés como texto de introducción a la Matemática, se hace público en el archivo digital por su interés históric

    Conjuntos preanalíticos

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    Conferencia pronunciada el 14 de mayo de 1974Depto. de Álgebra, Geometría y TopologíaFac. de Ciencias MatemáticasTRUEpu

    Matemática y experimentación

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    Depto. de Álgebra, Geometría y TopologíaFac. de Ciencias MatemáticasTRUEpu

    Perspectivas profesionales y científicas de la carrera de matemáticas

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    Serie: Publicaciones de la revista "Enseñanza media", número 164Depto. de Álgebra, Geometría y TopologíaFac. de Ciencias MatemáticasTRUEpu

    Flip Graphs of Degree-Bounded (Pseudo-)Triangulations

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    We study flip graphs of triangulations whose maximum vertex degree is bounded by a constant kk. In particular, we consider triangulations of sets of nn points in convex position in the plane and prove that their flip graph is connected if and only if k>6k > 6; the diameter of the flip graph is O(n2)O(n^2). We also show that, for general point sets, flip graphs of pointed pseudo-triangulations can be disconnected for k9k \leq 9, and flip graphs of triangulations can be disconnected for any kk. Additionally, we consider a relaxed version of the original problem. We allow the violation of the degree bound kk by a small constant. Any two triangulations with maximum degree at most kk of a convex point set are connected in the flip graph by a path of length O(nlogn)O(n \log n), where every intermediate triangulation has maximum degree at most k+4k+4.Comment: 13 pages, 12 figures, acknowledgments update

    Marteloscope design, installation and application for practical training and actual incorporation of economic, ecological and sociological values to silvicultural treatments in forest stands

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    Un Marteloscopio es una herramienta didáctica para el entrenamiento selvícola (ejercicios virtuales de selección de árboles). La disponibilidad de los datos del rodal forestal en un dispositivo móvil (tablet) en combinación con un software adecuado permite obtener una retroalimentación directa entre las decisiones selvícolas ensayadas y sus efectos en términos económicos y ecológicos. A través de este Proyecto de Innovación Docente hemos diseñado, implementado y realizado pruebas preliminares de un Marteloscopio en la Sierra de Cazorla (Jaén). Como resultado, hemos establecido una parcela permanente de 1 ha en el bosque en la cual se han geolocalizado, medido, marcado y evaluado su valor en microhábitats de todos los árboles existentes en la misma. Hemos desarrollado el correspondiente software para pc o tablet para simular en tiempo real los efectos de los ejercicios selvícolas en monte, produciendo salidas instantáneas de los efectos de las claras simuladas sobre la distribución espacial de los árboles y el valor económico y ecológico, tanto de los árboles extraídos como de los que quedan en pie. Hemos realizado un ensayo preliminar del Marteloscopio en un Curso Propio de la UCO denominado "Praxis en el Medio Forestal" que ha tenido lugar en el mes de abril de 2017.A Marteloscope is a didactic tool for silvicultural training (virtual tree selection exercises). The availability of stand data on mobile devices (tablets) in combination with an appropriate software allows direct feedback on silvicultural decisions and resulting economic and ecological effects. Through this Teaching Innovation Project, we have designed, implemented and made preliminary tests of a Marteloscope in Sierra de Cazorla(Jaén). As a result, we have set up a permanent plot of 1 ha in the forest, where all trees have been geolocated, measured, marked and valued for microhabitats. We have developed the corresponding software for pc or tablets to simulate in real time the effects of silvicultural exercises, producing instantaneous outputs showing the effects of simulated thinnings on spatial distribution of trees and economic and ecological value of remaining and removed trees. We have preliminary tested the marteloscope in a UCO extension course on Forestry Practice, april 2017

    Investigating the potential of Sentinel-2 configuration to predict the quality of Mediterranean permanent grasslands in open woodlands

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    The assessment of pasture quality in permanent grasslands is essential for their conservation and management, as it can contribute to making real-time decisions for livestock management. In this study, we assessed the potential of Sentinel-2 configuration to predict forage quality in high diverse Mediterranean permanent grasslands of open woodlands. We evaluated the performance of Partial Least Squares Regression (PLS) models to predict crude protein (CP), neutral detergent fibre (NDF), acid detergent fibre (ADF) and enzyme digestibility of organic matter (EDOM) by using three different reflectance datasets: (i) laboratory measurements of reflectance of dry and ground pasture samples re-sampled to Sentinel-2 configuration (Spec-lab) (ii) field in-situ measurements of grasslands canopy reflectance resampled to Sentinel-2 configuration (Spec-field); (iii) and Bottom Of Atmosphere Sentinel-2 imagery. For the three reflectance datasets, the models to predict CP content showed moderate performance and predictive ability. Mean R2test = 0.68 were obtained using Spec-lab data, mean R2test decreased by 0.11 with Spec-field and by 0.18 when Sentinel-2 reflectance was used. Statistics for NDF showed worse predictions than those obtained for CP: predictions produced with Spec-lab showed mean R2test = 0.64 and mean RPDtest = 1.73. The mean values of R2test = 0.50 and RPDtest = 1.54 using Sentinel-2 BOA reflectance were marginally better than the values obtained with Spec-field (mean R2test = 0.48, mean RPDtest = 1.43). For ADF and EDOM, only predictions made with Spec-lab produced acceptable results. Bands from the red-edge region, especially band 5, and the SWIR regions showed the highest contribution to estimating CP and NDF. Bands 2, blue and 4, red also seem to be important. The implementation of field spectroscopy in combination with Sentinel-2 imagery proved to be feasible to produce forage quality maps and to develop larger datasets. This study contributes to increasing knowledge of the potential and applicability of Sentinel-2 to predict the quality of Mediterranean permanent grasslands in open woodlands

    Design of marteloscope for simulation of silvicultural management of cork oak forest under field conditions

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    Un marteloscopio es una herramienta didáctica de gran utilidad para el entrenamiento en selvicultura. La disponibilidad de datos reales sobre la masa forestal en dispositivos móviles (tablets) en combinación con un software adecuado permite la retroalimentación directa entre las decisiones selvícolas y los resultados, tanto económicos como ecológicos de las mismas. A través de este Proyecto de Innovación Docente, se ha avanzado en esta línea formativa diseñando e implementando, por primera vez, un marteloscopio en monte alcornocal orientado a la producción de corcho. Como resultado, se ha establecido una parcela permanente de entrenamiento en un alcornocal, que se ha monitorizado de forma exhaustiva, y se ha desarrollado un software nuevo para pc o tablet que simula en tiempo real los efectos de ejercicios de claras selvícolas y de descorches, que el usuario introduce, y que genera salidas instantáneas sobre la producción de corcho obtenida y sus características y sus efectos sobre la masa forestal. Esta simulación facilita el aprendizaje realista de la gestión de alcornocales y la comprensión de los efectos que las decisiones de gestión tomadas tienen sobre los aspectos productivos y ecológicos de la masa forestal.A Marteloscope is an educational tool for silvicultural and forest management training. The availability of actual stand data on mobile devices (tablets) in combination with the appropriate software allows direct feedback among silvicultural decisions and the resulting economic and ecological outcomes. Through this Teaching Innovation Project, we have gone further on this approach by designing and implementing, for the first time, a Marteloscope in a cork oak stand managed for cork production. As a result, we have set up a permanent training plot in the forest, where all trees have been geolocated, measured, both in size and cork production features, marked and also assessed for their ecological value through microhabitat identification approach. We have developed new software for pc or tablets to simulate in real-time silvicultural and cork stripping exercises made by the user, producing instantaneous outputs showing the effects on cork production and forest stand, both currently and after 9 years period (duration of debarking rotation). This simulation facilitates realistic learning of cork oak stands management practices and the understanding of the effects of management decisions on productive and ecological dynamics of forest stand

    Dimensión de una variedad algebraica

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    Depto. de Álgebra, Geometría y TopologíaFac. de Ciencias MatemáticasTRUEpu

    Teoría de grupos

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    Separata de 5 artículos publicados en la revista "Matemática elemental", 4ª serie, tomo II, 1941-1942Depto. de Álgebra, Geometría y TopologíaFac. de Ciencias MatemáticasTRUEpu
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