2,101 research outputs found
OBIA approach for the analysis of medium and high resolution satellite data for environmental monitoring: PV plant mapping
No full textThe global expansion of photovoltaic (PV) installations continues to grow
in response to rising energy demand and the need for sustainable energy produc
tion. However, large-scale solar farms require the use of large areas of land that
are diverted from food production, the demand for which has increased dramat
ically in recent years, owing to the growing world population. To monitor the
rapid growth of solar farms, it is essential to collect data on the quantity, distri
bution, and impact of these systems. Despite the many challenges in mapping PV
systems owing to the variety of materials and complexity of layouts, many re
searchers are trying to improve this process using remote sensing techniques
combined with machine and deep learning. This study developed a comprehen
sive framework for mapping and monitoring PV systems using open-source Sen
tinel-2 (S2) satellite imagery and remote sensing techniques supported by ma
chine-learning algorithms. The framework was applied to two study areas with
different characteristics by adopting an Object-Based Image Analysis (OBIA) ap
proach to improve image segmentation and classification. The preliminary phase
included the analysis of the Normalized Difference Vegetation Index (NDVI) index
variation within the Ground Truth (GT) polygons, improving the segmentation
through the creation of imag
Postal de Claudio Vivas a Maruja Vieira, junio 23 de 1955
No full textPostal de Claudio Vivas a Maruja Vieira, felicitándola por el reconocimiento que le fue otorgado a la autora de poemasPostcard from Claudio Vivas to Maruja Vieira, congratulating her for the recognition given to the author of poems.Publicación, fondo Maruja Vieira, carpeta 1, folio
“Dialogue between Translators and Authors. The Example of Claudio Magris”
No full textThe paper focuses on the forms of cooperation between authors and their translator(s) in all cases in which the two operate simultaneously. This issue is explored on the example of the Trieste-born author Claudio Magris, who cultivates a very close relationship with most of his translators.
Writing and translation have been coexisting in this author throughout his career and have resulted in the heightened sensitivity of Magris the author with regards to translation, as the first part of the analysis shows. The second part describes the dialogue between Magris and the translators of his works, and ends with the more general question of the significance and role of such a form of exchange
Consideraciones sobre la poética de Claudio Rodríguez
No full textThe purpose of this paper is to study the poetics of Claudio Rodríguez, delimiting its components and trying to clarify them and to present them as a whole. The author left some pages written on his conception of poetry that encourage reflection and, in some cases, interpretation. So with his conception of poetry as a gift and inebriation, as an alliance and condemnation or celebration (giving title to his collections of poems), or with notions such as «participation», «living contemplation», «living expression » or «personal rhythm» that make up his way of understanding the poetic process.El propósito de este artículo es estudiar la poética de Claudio Rodríguez, deslindando sus componentes y tratando de clarificarlos y presentarlos en su conjunto. El autor dejó escritas algunas páginas sobre su concepción de la poesía que animan a la reflexión y, en algunos casos, a la interpretación. Así sucede con su concepción de la poesía como un don y una ebriedad, como alianza y condena o como celebración (que dan título a sus poemarios), o con nociones como las de «participación», «contemplación viva», «expresión viva» o «ritmo personal», que configuran su forma de entender el proceso poético
Building digital twins for personalized cardiovascular medicine: Advances, challenges, and future directions
No full textComputational replication of the patient-specific stenting procedure for coronary artery bifurcations: From OCT and CT imaging to structural and hemodynamics analyses
No full textThe optimal stenting technique for coronary artery bifurcations is still debated. With additional advances computational simulations can soon be used to compare stent designs or strategies based on verified structural and hemodynamics results in order to identify the optimal solution for each individual's anatomy. In this study, patient-specific simulations of stent deployment were performed for 2 cases to replicate the complete procedure conducted by interventional cardiologists. Subsequent computational fluid dynamics (CFD) analyses were conducted to quantify hemodynamic quantities linked to restenosis. Patient-specific pre-operative models of coronary bifurcations were reconstructed from CT angiography and optical coherence tomography (OCT). Plaque location and composition were estimated from OCT and assigned to models, and structural simulations were performed in Abaqus. Artery geometries after virtual stent expansion of Xience Prime or Nobori stents created in SolidWorks were compared to post-operative geometry from OCT and CT before being extracted and used for CFD simulations in SimVascular. Inflow boundary conditions based on body surface area, and downstream vascular resistances and capacitances were applied at branches to mimic physiology. Artery geometries obtained after virtual expansion were in good agreement with those reconstructed from patient images. Quantitative comparison of the distance between reconstructed and post-stent geometries revealed a maximum difference in area of 20.4%. Adverse indices of wall shear stress were more pronounced for thicker Nobori stents in both patients. These findings verify structural analyses of stent expansion, introduce a workflow to combine software packages for solid and fluid mechanics analysis, and underscore important stent design features from prior idealized studies. The proposed approach may ultimately be useful in determining an optimal choice of stent and position for each patient
Comparison of spectral indices extracted from Sentinel-2 images to map plastic covered greenhouses through an object-based approach
No full textOne of the most important challenges of agriculture today is increasing its productivity gains, while controlling its environmental footprint. Because of that plastic covered greenhouses (PCG) mapping via remote sensing is receiving a great attention throughout this century. In this study, a fair comparison was carried out in four PCG study areas around the world to test 14 spectral indices mainly focused on the detection of plastic. To the best knowledge of the authors, this is the first research that fairly compares all these spectral indices in such variable number of study sites. The applied OBIA approach was based on the combined use of very high-resolution satellite data (Deimos-2 pansharpened images) to address the segmentation process and Sentinel-2 time series to compute the spectral indices. When dealing with Sentinel-2 single images, the Plastic GreenHouse Index (PGHI) stood out among all the indices tested in the study areas dedicated to the cultivation of vegetables, such as the cases of Almería (Spain), Agadir (Morocco) and Antalya (Turkey). Better Overall Accuracy (OA) values of 94.09%, 92.27%, 92.77% and 92.17% were achieved for Almería, Agadir, Bari and Antalya study sites, respectively, when using statistical seasonal spectral indices based on Sentinel-2 time series, being the maximum and mean values of PGHI (MAX (PGHI) and MEAN (PGHI)) the best ranked. Meanwhile, the PCG area of Bari (Italy), with a monoculture in vineyards, presented the worst and most irregular results
ELEMENTOS ESTRUTURAIS NA SINFONIA Nº 10 – AMAZONAS, DE CLAUDIO SANTORO
No full textEste artigo apresenta uma análise da Sinfonia no 10 – Amazonas, de Claudio Santoro, composta em 1982, apontando seus elementos estruturais, tendo como base a Versão para dois pianos e barítono da referida sinfonia, elaborada por esta autora.
Abstract
This article shows an analysis of the Claudio Santoro’s Symphony no 10, composed in 1982, appointing the structures elements as based on Version for two pianos and baritone by the author
El Tlacuache Núm. 683 (2015). 683 Año 13 (2015) julio. El Tlacuache
No full textPueblos Indígenas y Minas de Hielo en la Nueva España por Ricardo Claudio Pacheco Bribiesca
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