Search results for "Images"

Estimation of the volume of Posidonia oceanica detritus accumulations along Sicilian coasts by using very high resolution images

2019

Posidonia oceanica meadows are among the most important marine coastal ecosystems in the Mediterranean Sea due to several roles they are able to play. They, in fact, support high levels of primary production, enhance sedimentation of suspended particles through their canopies, prevent resuspension of marine sediments by means of roots and rhizomes and counteract coast erosion. Part of the primary production of this seagrass is not transferred to herbivores either immediately to detritus pathway but it can accumulate on the shore in form of banquette, typical structures exerting a significant role in protection of beaches from erosion. To accurately measure the extension, morphology, volume …

The use of very high-resolution images for mapping of Posidonia oceanica reef

2020

Posidonia oceanica is an endemic Mediterranean seagrass that forms wide and dense meadows from the surface up to about 40 m depth. P. oceanica can develop on matte, a typical terraced structure built up by itself, consisting of intertwined rhizomes, roots and sediment, which may allow shoots to reach the sea surface, where may form typical reefs (récif barrière) considered “natural monuments”. These structures have received increasing attention for the potential ecosystem services they provide in protecting the coasts from erosion, forming new habitats (coastal lagoons) and contributing to carbon sink. P. oceanica reefs are particularly exposed to the expected increase in temperature and to…

¿Qué representan las portadas de los libros de texto de Educación Física en Primaria?

2018

Resumen. Este estudio analiza la imagen del cuerpo representado en las portadas de los libros de texto de Educación Física vinculado a un tipo de actividad física, para comprobar si se ajustan a las directrices que marca la legislación actual con respecto a los materiales curriculares. El estudio es de tipo empírico, descriptivo y comparativo entre los libros de texto analizados. La muestra estuvo constituida por 12 portadas de dos editoriales, publicadas bajo la Ley Orgánica 8/2013 para la Mejora de la Calidad Educativa (LOMCE). La técnica de investigación fue el análisis de contenido a través de la herramienta SAIMEF (Sistema de Análisis de Imágenes en Educación Física). Se realizó un aná…

Automatic texture mapping on real 3D model

2007

We propose a full automatic technique to project virtual texture on a real textureless 3D object. Our system is composed of cameras and projector and are used to determine the pose of the object in the real world with the projector as reference and then estimate the image seen by the projector if it would be a camera.

Novel view synthesis for projective texture mapping on real 3D objects

2006

Industrial reproduction, as stereography or lithography, have a lack in texture information, as they only deal with 3D reconstruction. In this paper, we provide a new technique to map texture on real 3D objects, by synthesizing a novel view from two camera images to a projector frame, considered as a camera acting in reverse. No prior information on the pose or the shape of the 3D object is necessary, however hard calibration of the complete system is needed.

Teacher Agency and Futures Thinking

2022

Problems encountered in top-down school reforms have repeatedly highlighted the significance of teachers’ agency in educational change. At the same time, temporality has been identified as a key element in teachers’ agency, with teachers’ beliefs about the future and experiences of the past shaping their agentic orientations. However, research on teachers’ future orientations is typically limited to short-term trajectories, as opposed to long-term visions of education. To address this, we draw on a futures studies perspective to give more explicit attention to teachers’ long-term visions of their work. We argue that the method of future narratives, already well…

Pseudomembranous invasive tracheobronchial aspergillosis.

2004

Invasive aspergillus tracheobronchitis is a rare infectious complication in severely immunocompromised patients who are generally neutropenic with haematological diseases, AIDS, or after solid organ transplantation. However, a few cases have been reported with no apparent severe compromise in the host defences.1 Aspergillus tracheobronchitis varies from localised tracheobronchitis …

Lifesaving Stenting of Pulmonary Arteries Critically Narrowed by Mediastinal Lymphoma

2019

Pueblo de santos y peregrinaciones en las diócesis de Autun y de Nevers: del tiempo de los mártires al tiempo de las reformas, IV - XVIII siglos

2006

Between the IVth and the XVIIIth century in Burgundy (Nevers to Vezelay area), the number of pilgrimage churches have increased with an important renewal rate. Indeed, the choice of saints, institutions, or objects of devotion depends on various references. Adapting the framework and updating hagiography to the evolution of piety are means of preservation against disinterest and decreased gains. What is miraculous or not is changing and depends on unstable religious and social settings, therefore it becomes necessary to consider both important and sustainable sites than short-lived ones and vain attempts to develop a pilgrimage site. By resorting as much as possible to the original document…

QR-Factorization Algorithm for Computed Tomography (CT): Comparison With FDK and Conjugate Gradient (CG) Algorithms

2018

[EN] Even though QR-factorization of the system matrix for tomographic devices has been already used for medical imaging, to date, no satisfactory solution has been found for solving large linear systems, such as those used in computed tomography (CT) (in the order of 106 equations). In CT, the Feldkamp, Davis, and Kress back projection algorithm (FDK) and iterative methods like conjugate gradient (CG) are the standard methods used for image reconstruction. As the image reconstruction problem can be modeled by a large linear system of equations, QR-factorization of the system matrix could be used to solve this system. Current advances in computer science enable the use of direct methods for…