Clasificación de cultivos en la provincia de Buenos Aires mediante la utilización de imágenes SAR e imágenes ópticas

Tesis (Magister en Aplicaciones Espaciales de Alerta y Respuesta Temprana a Emergencias)--Universidad Nacional de Córdoba, Facultad de Matemática, Astronomía, Física y Computación, 2017.Maestría conjunta entre FAMAF y el Instituto de Altos Estudios Espaciales "Mario Gulich" CONAE/UNC.La tesis de maestría presenta tres aplicaciones obtenidas a partir de información satelital que son de interés de la administración fiscal de la Provincia de Buenos Aires: La detección remota de cultivos y estimación de su superficie cultivada, la clasificación supervisada de cultivos a través de imágenes satelitales ópticas y por último, la utilización de imágenes SAR (Radar de Apertura Sintética) para clasificar cultivos. Se utilizaron series temporales de imágenes SAR Cosmo SkyMed, Sentinel-1 A y Landsat 8 – OLI, para clasificar de manera supervisada cultivos de interés en la Provincia de Buenos Aires. Se probaron distintas combinaciones de imágenes SAR y Landsat 8 para clasificar cultivos. Se utilizaron los clasificadores de Máxima verosimilitud, Árboles de decisión (DT), “Random Forest”, “Gradient Boosted Tree”, “Support Vector Machine”, “Neural Network” para clasificar imágenes SAR con el objetivo de confeccionar mapas de cultivos en tres zonas de la provincia de Buenos Aires. Se obtuvieron precisiones de entre 89% y 92% en todas las zonas de estudio. Las clasificaciones sobre imágenes SAR obtuvieron mejores precisiones con clasificadores no paramétricos en dos de tres casos. El clasificador “Random Forest” presentó el mejor desempeño. Por último, se ha propuesto una metodología de trabajo para incorporar imágenes SAR a los productos cartográficos de la agencia de Recaudación de la provincia de Buenos Aires.Fil: Di Paolo, Luciano Elías. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía, Física y Computación; Argentina.Fil: Di Paolo, Luciano Elías. Universidad Nacional de Córdoba - Comisión Nacional de Actividades Espaciales. Instituto de Altos Estudios Espaciales Mario Gulich; Argentina

Extreme Ultraviolet (EUV) Sources for Lithography based on Synchrotron Radiation

The study presented here was initiated by a discussion to investigate the possibility of using synchrotron radiation as a source for the Next Generation Lithography (NGL) based on the EUV-concept (Extreme Ultra-Violet; here 13.5 nm or 11.3 nm radiation, respectively). The requirements are: 50 W, 2% bandwidth and minimal power outside this bandwidth. Three options were investigated. The first two deal with radiation from bending magnets and undulators. The results confirm the earlier work by Oxfords Instrument and others that these light-sources lack in-band power while emitting excessive out-of-band radiation. The third approach is a FEL (Free Electron Laser) driven by a 500 MeV linear accelerator with a superconducting mini-undulator as radiation emitting device. Such a device would produce in-band EUV-power in excess of 50 W with negligible out-of-band power.Comment: Submitted to Nuclear Instruments and Methods

Advances in pantographic structures: design, manufacturing, models, experiments and image analyses

In the last decade, the exotic properties of pantographic metamaterials have been investigated and different mathematical models (both discrete or continuous) have been introduced. In a previous publication, a large part of the already existing literature about pantographic metamaterials has been presented. In this paper, we give some details about the next generation of research in this field. We present an organic scheme of the whole process of design, fabrication, experiments, models and image analyses

Status of the development of the EU 170 GHz/1 MW/CW gyrotron

The progress in the development of the European 170 GHz, 1 MW/CW gyrotron for electron cyclotron heating & current drive (ECH&CD) on ITER is reported. A continuous wave (CW) prototype is being manufactured by Thales Electron Devices (TED), France, while a short-pulse (SP) prototype gyrotron is in parallel under manufacture at Karlsruhe Institute of Technology (KIT), with the purpose of validating the design of the CW industrial prototype components. The fabrication of most of the sub-assemblies of the SP prototype has been completed. In a first step, an existing magnetron injection gun (MIG) available at KIT was used. Despite this non-ideal configuration, the experiments provided a validation of the design, substantiated by an excellent agreement with numerical simulations. The tube, operated without a depressed collector, is able to produce more than 1 MW of output power with efficiency in excess of 30%, as expected, and compatible with the ITER requirements. (C) 2015 Karlsruhe Institute of Technology. Published by Elsevier B.V. All rights reserved