999 resultados para Interferometria diferencial
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Ground subsidence caused by aquifer exploitation is a geotechnical hazard that affects wide areas, causing important economic damages. This phenomenon is due to soil consolidation produced by the increase of effective stress caused by piezometric depletion. In this work a Remote Sensing Technique called Coherent Pixel (CPT) is applied to monitor subsidence in the Vega Media of the Segura River during a period of eleven years.
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En el presente trabajo se han estudiado mediante DSC, las reacciones involucradas en el tratamiento térmico de los principales componentes en las formulaciones de materiales espumados como son EVA, PE, azodicarbonamida y α- α’-bis(tertbutil-peroxi)-m/p-diisopropilbenceno. Los ensayos se han realizado a una velocidad de calefacción constante de 10 ºC/min en atmósfera inerte de N2. Por otro lado, también se proponen una serie de modelos cinéticos mecanísticos que contemplan la existencia de una o más fracciones reactivas y/o reacciones. Además se ha introducido la variación de las capacidades caloríficas con la temperatura, consiguiendo de esta forma una mejora considerable del ajuste de los datos experimentales. Los modelos presentados son capaces de representar los diferentes procesos observados (con varios picos) y pueden ser de gran interés para la compresión de este tipo de fenómenos, así como para el modelado de la transferencia de calor que se produce durante los procesos industriales de espumado. (Nota: se incluye al final un lisado actualizado con bibliografía específica sobre modelado cinético).
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El propósito del trabajo ha sido el de confirmar las siguientes hipótesis: 1) Los pacientes hospitalizados indicarán la ocurrencia de un menor número de estresores hospitalarios que los profesionales de enfermería. 2) La valoración del grado de estrés referido a los distintos acontecimientos ocurridos durante la hospitalización será significativamente menor en los pacientes que en el personal de enfermería. Para ello 66, pacientes hospitalizados y 66 profesionales de enfermería que atendían a los primeros cumplimentaron una adaptación de la escala de estresores hospitalarios de Volicer y Bohanon (1975), elaborada a propósito de este estudio, a partir de otras versiones españolas. Los resultados encontrados confirman las dos hipótesis. Para finalizar se comenta la diferente percepción de pacientes y profesionales de enfermería respecto a grupos de estresores determinados: gravedad del problema de salud, falta de información y sometimiento a las rutinas hospitalarias, entre otros.
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Dissertação para obtenção do grau de Mestre no Instituto Superior de Ciências da Saúde Egas Moniz
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Mode of access: Internet.
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Mode of access: Internet.
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Nota en cubierta: "Certamen literario de 1846. Disertante Dn. Benito Garcia de los Santos. Arguyentes Sres. Claramunt y Torrellas"
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Tít. entresacado del texto.
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Mode of access: Internet.
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Port. con esc. real.
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Contiene XXXIX números, que denomina "Pliegos", desde el lunes 7 de octubre de 1765 al lunes 21 de abril de 1766.
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En port.: Obra destinada a la enseñanza en el Real Colegio general militar.
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About 10% of faults involving the electrical system occurs in power transformers. Therefore, the protection applied to the power transformers is essential to ensure the continuous operation of this device and the efficiency of the electrical system. Among the protection functions applied to power transformers, the differential protection appears as one of the main schemes, presenting reliable discrimination between internal faults and external faults or inrush currents. However, when using the low frequency components of the differential currents flowing through the transformer, the main difficulty of the conventional methods of differential protection is the delay for detection of the events. However, internal faults, external faults and other disturbances related to the transformer operation present transient and can be appropriately detected by the wavelet transform. In this paper is proposed the development of a wavelet-based differential protection for detection and identification of external faults to the transformer, internal faults, and transformer energizing by using the wavelet coefficient energy of the differential currents. The obtained results reveal the advantages of using of the wavelet transform in the differential protection compared to conventional protection, since it provides reliability and speed in detection of these events.
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Automatic detection of blood components is an important topic in the field of hematology. The segmentation is an important stage because it allows components to be grouped into common areas and processed separately and leukocyte differential classification enables them to be analyzed separately. With the auto-segmentation and differential classification, this work is contributing to the analysis process of blood components by providing tools that reduce the manual labor and increasing its accuracy and efficiency. Using techniques of digital image processing associated with a generic and automatic fuzzy approach, this work proposes two Fuzzy Inference Systems, defined as I and II, for autosegmentation of blood components and leukocyte differential classification, respectively, in microscopic images smears. Using the Fuzzy Inference System I, the proposed technique performs the segmentation of the image in four regions: the leukocyte’s nucleus and cytoplasm, erythrocyte and plasma area and using the Fuzzy Inference System II and the segmented leukocyte (nucleus and cytoplasm) classify them differentially in five types: basophils, eosinophils, lymphocytes, monocytes and neutrophils. Were used for testing 530 images containing microscopic samples of blood smears with different methods. The images were processed and its accuracy indices and Gold Standards were calculated and compared with the manual results and other results found at literature for the same problems. Regarding segmentation, a technique developed showed percentages of accuracy of 97.31% for leukocytes, 95.39% to erythrocytes and 95.06% for blood plasma. As for the differential classification, the percentage varied between 92.98% and 98.39% for the different leukocyte types. In addition to promoting auto-segmentation and differential classification, the proposed technique also contributes to the definition of new descriptors and the construction of an image database using various processes hematological staining