25 research outputs found

    Aeronautical engineering: A continuing bibliography with indexes (supplement 292)

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    This bibliography lists 675 reports, articles, and other documents recently introduced into the NASA scientific and technical information system database. Subject coverage includes the following: design, construction and testing of aircraft and aircraft engines; aircraft components, equipment, and systems; ground support systems; and theoretical and applied aspects of aerodynamics and general fluid dynamics

    Aeronautical engineering: A continuing bibliography with indexes (supplement 291)

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    This bibliography lists 757 reports, articles, and other documents introduced into the NASA scientific and technical information system in May. 1993. Subject coverage includes: design, construction and testing of aircraft and aircraft engines; aircraft components, equipment, and systems; ground support systems; and theoretical and applied aspects of aerodynamics and general fluid dynamics

    Phanerozoic evolution of mantle convection, long-wavelength dynamic topography and long-term sea level in a global tectonic framework

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    The changing pattern of convective circulation in the Earth’s mantle induces slowly developing, vertical displacements of the crustal surface resulting in dynamic topography; which influences erosion, sedimentation, eustatic sea-level change and continental flooding. Given the importance of dynamic topography, attempts have been made to constrain its spatiotemporal pattern, wavelength and amplitude. Thus, tracking the influence of mantle flow over geologic time is one of the important scientific endeavours. To achieve this aim, geodynamic experiments of mantle convection can be coupled with plate tectonic reconstructions to predict upwellings and downwellings that in turn elevate or depress the Earth’s surface. The overarching aim of this thesis is to understand and quantify the effect of mantle dynamics on the Earth’s surface throughout the Phanerozoic by combining global plate tectonic reconstructions, dynamic Earth models and geological observations

    Aeronautical engineering, a continuing bibliography with indexes

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    This bibliography lists 823 reports, articles, and other documents introduced into the NASA scientific and technical information system in November 1984

    Image Segmentation in a Remote Sensing Perspective

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    Image segmentation is generally defined as the process of partitioning an image into suitable groups of pixels such that each region is homogeneous but the union of two adjacent regions is not, according to a homogeneity criterion that is application specific. In most automatic image processing tasks, efficient image segmentation is one of the most critical steps and, in general, no unique solution can be provided for all possible applications. My thesis is mainly focused on Remote Sensing (RS) images, a domain in which a growing attention has been devoted to image segmentation in the last decades, as a fundamental step for various application such as land cover/land use classification and change detection. In particular, several different aspects have been addressed, which span from the design of novel low-level image segmentation techniques to the de?nition of new application scenarios leveraging Object-based Image Analysis (OBIA). More specifically, this summary will cover the three main activities carried out during my PhD: first, the development of two segmentation techniques for object layer extraction from multi/hyper-spectral and multi-resolution images is presented, based on respectively morphological image analysis and graph clustering. Finally, a new paradigm for the interactive segmentation of Synthetic Aperture Radar (SAR) multi-temporal series is introduced
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