5,469 research outputs found
Object-Based Greenhouse Mapping Using Very High Resolution Satellite Data and Landsat 8 Time Series
Greenhouse mapping through remote sensing has received extensive attention over the last decades. In this article, the innovative goal relies on mapping greenhouses through the combined use of very high resolution satellite data (WorldView-2) and Landsat 8 Operational Land Imager (OLI) time series within a context of an object-based image analysis (OBIA) and decision tree classification. Thus, WorldView-2 was mainly used to segment the study area focusing on individual greenhouses. Basic spectral information, spectral and vegetation indices, textural features, seasonal statistics and a spectral metric (Moment Distance Index, MDI) derived from Landsat 8 time series and/or WorldView-2 imagery were computed on previously segmented image objects. In order to test its temporal stability, the same approach was applied for two different years, 2014 and 2015. In both years, MDI was pointed out as the most important feature to detect greenhouses. Moreover, the threshold value of this spectral metric turned to be extremely stable for both Landsat 8 and WorldView-2 imagery. A simple decision tree always using the same threshold values for features from Landsat 8 time series and WorldView-2 was finally proposed. Overall accuracies of 93.0% and 93.3% and kappa coefficients of 0.856 and 0.861 were attained for 2014 and 2015 datasets, respectively
La observación de diferencias de género en balonmano
Superar una mirada superficial en relación al género en balonmano, mediante la identificación de diferencias entre chicas y chicos en competiciones de alto nivel es objetivo del presente trabajo. Sobre qué variables o criterios (lanzamientos, efectividad, espacio y señalizaciones arbitrales) y categorías observacionales descansan estas diferencias resulta esencial para poder identificar comportamientos estratégicos. Se recurrió a una metodología observacional para registrar los eventos del juego. Fueron seleccionados dos partidos de balonmano femenino y dos partidos masculinos, pertenecientes a las fases finales de los juegos olímpicos de Londres 2012. El diseño observacional fue nomotético, puntual y multidimensional. Se diseñó una herramienta ‘ad hoc’, puesta en práctica por dos evaluadores. Una vez fueron registrados los datos mediante el software Lince, fueron analizados mediante la técnica de reducción de datos Theme. Los resultados evidenciaron la existencia T-patterns en función del género.Overcoming a superficial view regarding the gender in handball, through the identification of differences between women and men in high level competitions is the objective of this work. Knowing on which observational variables or criteria (throwing, effectiveness, zone and referee signs) and categories these differences rely is essential for identifying strategic behaviors. An observational methodology was used to record the events of the game. Two women's and two men's handball matches were selected, belonging to the final phases of the London 2012 Olympic Games. The observational design was nomothetic, punctual and multidimensional. An ‘ad hoc’ tool was designed, and it was implemented by two evaluators. Once the data were recorded using the Lince software, they were analyzed through the data reduction technique Theme. The results evidenced the existence of T-patterns based on gender.peerReviewe
La calidad temporal de registros en balonmano
Este trabajo es un estudio exploratorio para incrementar el control de la calidad del dato, mediante el empleo de coeficientes de correlación temporal. La consolidación de la metodología observacional (Anguera, 2017) ha venido precedida por mejoras de distinta índole. Se partió de una herramienta de registro observacional aplicada al balonmano y compuesta por criterios y categorías. El diseño del estudio se correspondió con el cuadrante III, a) nomotético, puntual, multidimensional. Dos observadores registraron partidos de balonmano (N=4) con ayuda del software Lince. Se emplearon los paquetes estadísticos SPSS v. 24 y JASP v. 0820 para así asociar los tiempos de cada registro inter observador y calcular los coeficientes de correlación entre otros análisis. La aplicación práctica del trabajo tendría en el análisis del comportamiento motor un campo de aplicación pero no el único. Abordar la sincronización de los observadores al registrar es un procedimiento susceptible de avanzar en fiabilidad y precisión.This work is an exploratory study to increase data quality control, by using temporal correlation coefficients. The consolidation of the observational methodology (Anguera, 2017) has been preceded by improvements of a different nature. It was based on an observational registration tool applied to handball and made up of criteria and categories. The study design corresponded to quadrant III, as a) nomothetic, isolated, and multidimensional. Two observers recorded handball matches (N=4) with the help of Lince software. Statistical packages, SPSS v. 24 and JASP v. 0820, were used to associate the times of each inter-observer register and calculate the correlation coefficients among other analysis. The practical application of the work would have in the analysis of motor behavior an application but that is not the only one. Addressing the synchronization of observers when registering is a procedure open to improvement both in reliability and accuracy.Ministerio de Economía y Competitividad, con financiación de FEDER. Proyectos: “La actividad física y el deporte como potenciadores del estilo de vida saludable: evaluación del comportamiento deportivo desde metodologías no intrusivas” (DEP2015-66069-P) y “Avances metodológicos y tecnológicos en el estudio observacional del comportamiento deportivo” (PSI2015-71947-REDP)peerReviewe
La observación de diferencias de género en balonmano
Superar una mirada superficial en relación al género en balonmano, mediante la identificación de diferencias entre chicas y chicos en competiciones de alto nivel es objetivo del presente trabajo. Sobre qué variables o criterios (lanzamientos, efectividad, espacio y señalizaciones arbitrales) y categorías observacionales descansan estas diferencias resulta esencial para poder identificar comportamientos estratégicos. Se recurrió a una metodología observacional para registrar los eventos del juego. Fueron seleccionados dos partidos de balonmano femenino y dos partidos masculinos, pertenecientes a las fases finales de los juegos olímpicos de Londres 2012. El diseño observacional fue nomotético, puntual y multidimensional. Se diseñó una herramienta ‘ad hoc’, puesta en práctica por dos evaluadores. Una vez fueron registrados los datos mediante el software Lince, fueron analizados mediante la técnica de reducción de datos Theme. Los resultados evidenciaron la existencia T-patterns en función del género.Overcoming a superficial view regarding the gender in handball, through the identification of differences between women and men in high level competitions is the objective of this work. Knowing on which observational variables or criteria (throwing, effectiveness, zone and referee signs) and categories these differences rely is essential for identifying strategic behaviors. An observational methodology was used to record the events of the game. Two women's and two men's handball matches were selected, belonging to the final phases of the London 2012 Olympic Games. The observational design was nomothetic, punctual and multidimensional. An ‘ad hoc’ tool was designed, and it was implemented by two evaluators. Once the data were recorded using the Lince software, they were analyzed through the data reduction technique Theme. The results evidenced the existence of T-patterns based on gender.peerReviewe
A Quantitative Assessment of Forest Cover Change in the Moulouya River Watershed (Morocco) by the Integration of a Subpixel-Based and Object-Based Analysis of Landsat Data
A quantitative assessment of forest cover change in the Moulouya River watershed (Morocco) was carried out by means of an innovative approach from atmospherically corrected reflectance Landsat images corresponding to 1984 (Landsat 5 Thematic Mapper) and 2013 (Landsat 8 Operational Land Imager). An object-based image analysis (OBIA) was undertaken to classify segmented objects as forested or non-forested within the 2013 Landsat orthomosaic. A Random Forest classifier was applied to a set of training data based on a features vector composed of different types of object features such as vegetation indices, mean spectral values and pixel-based fractional cover derived from probabilistic spectral mixture analysis). The very high spatial resolution image data of Google Earth 2013 were employed to train/validate the Random Forest classifier, ranking the NDVI vegetation index and the corresponding pixel-based percentages of photosynthetic vegetation and bare soil as the most statistically significant object features to extract forested and non-forested areas. Regarding classification accuracy, an overall accuracy of 92.34% was achieved. The previously developed classification scheme was applied to the 1984 Landsat data to extract the forest cover change between 1984 and 2013, showing a slight net increase of 5.3% (ca. 8800 ha) in forested areas for the whole region
Herpetofauna del Parque Sierra de Nanchititla, estado de México, México. Lista, distribución y conservación
The Sierra de Nanchititla Natural Park is located in the southwestern corner of the state of Mexico. Most of the park is contained in the western half of the municipality of Tejupilco, bordered on the west by the states of Michoacan and Guerrero. Physiographically it is located in the Province of Sierra Madre del Sur, in the Subprovince of Depresión del rio Balsas, and represents a transition zone of climate, flora and fauna. A total of 48 species were registered in the Nanchititla Park, including 20 amphibians and 28 reptiles, of which 21 (44%) are new records for the localit
La tensión entre el derecho a no ser discriminado y otros derechos fundamentales
La lucha contra los delitos de odio dio un paso importante en 2013 cuando la Fiscalía General del Estado creó una red de Fiscales especializados en delitos contra el odio. Se designó un Fiscal en cada provincia encargado de la coordinación en su jurisdicción de todas las cuestiones relacionadas con este tipo de delitos. Cuatro años antes la Fiscalía de Barcelona creó el “Servicio de Delitos de Odio y Discriminación”, inspirador para el resto de las fiscalías desde su posición pionera.
Por medio de la creación de estas fiscalías se ha tratado de dar una respuesta eficaz al incremento de estos delitos en la sociedad española. Y, más concretamente, de ofrecer una especial protección a quienes sufrían el odio irracional y la discriminación por prejuicios basados en la raza, las creencias, la orientación e identidad sexual o la situación de exclusión social.
La figura del Fiscal Especialista en delitos de odio, según el modelo diseñado por el Ministerio Fiscal español, está hoy en día reconocida por la Agencia de Derechos Fundamentales de la Unión Europea “como un ejemplo de buena práctica que debería ser reproducido en otros Estados miembros”.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tec
The Non-Parametric Luminosity Evolution of Long Gamma-ray Bursts and Star Rate Formation
In this research project the luminosity function of gamma-ray bursts was computed using the Efron- Petrosian method, which allowed us to find such properties an a non-parametric way. Data gathered from the Swift and Konus-Wind satellites was added for the first time by Fermi Satellite. The computation showed similar traces and patterns of the luminosity function compared to the ones of presented by Petrosian et al 2015. Further development needs to be performed for the display of the star formation rate
The mountain pass theorem on subsystems of second order arithmetic
Treballs Finals del Màster de Lògica Pura i Aplicada, Facultat de Filosofia, Universitat de Barcelona. Curs: 2023-2024. Tutor: David Fernández-DuqueThe main goal of this work is to formalize the Mountain Pass Theorem of Ambrosetti
and Rabinowitz within the formal subsystem of second order arithmetic
known as ACA0. We develop some Analysis within this system to have access to
the space of continuous functions from [0, 1] into a separable Banach space and
from there built formalized proofs of the basic ingredients of the Mountain Pass
Theorem: The deformation lemma and the minimax principle that proves the theorem
itself
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