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The future of education in today's revolutionary digital world.

User-generated content. --- User-created content --- Electronic information resources --- Social media --- Wikipedia.

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À l'heure des nouvelles pratiques numériques inhérentes à notre hypermodernité, tout un chacun peut appuyer sur un bouton pour obtenir une image, mixer un son, rédiger un blogue et partager le contenu de sa réalisation. Qu'est-ce qui différencie dès lors une production artistique d'une production amateur ? Quelles sont les frontières qui séparent la culture populaire de la culture légitime dans ce vivier de créations hybrides partagées sur Internet ? En s'appuyant sur l'analyse de démarches artistiques réalisées sur le Web, cet ouvrage, rédigé par trois spécialistes de l'image, de la musique et des écritures numériques, entend aborder les productions numériques amateurs non plus seulement sous un angle sociologique ou économique, mais également sous l'angle de la dynamique esthétique qui les caractérise.

User-generated content. --- User-created content --- Electronic information resources --- Social media --- médias sociaux --- pratiques amateures --- création numérique --- réseaux sociaux --- internet

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Internet --- Online identities. --- User-generated content --- Social aspects. --- User-created content --- Electronic information resources --- Social media --- Internet users --- Virtual identities --- Identity (Psychology) --- Identities

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Geology. Earth sciences --- Geology, Structural --- Gravity --- -Gravity --- -551.243 --- 551.435.6 --- Geophysics --- Mechanics --- Pendulum --- Geotectonics --- Structural geology --- Tectonics (Geology) --- Physical geology --- Addresses, essays, lectures --- Structural geology. Fracture disturbances. Plutonic fractures. Faults. Folds --- Relief forms created by gravity --- 551.435.6 Relief forms created by gravity --- 551.243 Structural geology. Fracture disturbances. Plutonic fractures. Faults. Folds --- 551.243

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This thesis aims at studying the recent dune dynamics and the interaction between the aeolian and fluvial processes at different temporal and spatial scales. The South-Rayan Dune-Field (SRDF) in Central Egypt was selected as the main study area for this research because it provides a typical example for analyzing dune dynamics and aeolian-fluvial interaction. At a first step a multi-temporal analysis of Landsat-TM5 images was performed to detect the migration of desert dunes in the SRDF over the time period 1984-2003. The near-infrared (NIR) spectral bands of the old and new Landsat-TM5 images were combined in a bi-temporal layerstack (BTLS), from which the dune migration and the overall sand drift over the entire dune-field can be detected. The BTLS was then used as an input to RGB-clustering (RGBC), which was performed to convert the color display of the BTLS into a map of dune activity between 1984 and 2003. In order to check the applicability and limitations of the technique it was also tested in other four dune systems around the globe. The technique proposed here was very successful in providing an initial insight into the dune dynamics in the dune-field

Academic collection --- 551.435.74 --- 55 <620> --- 551.435.74 Relief forms created by aeolian accumulation of sand. Dunes. Sand deserts (ergs) --- Relief forms created by aeolian accumulation of sand. Dunes. Sand deserts (ergs) --- Earth sciences. Geology. Meteorology etc.--Egypt --- Theses