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Civilization, Modern --- Islam and secularism --- Islamic sociology --- Islam --- Modernité --- Islam et laïcité --- Sociologie religieuse --- Religious aspects --- Relations --- Aspect religieux

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Shahada, tijd om te bidden, zakaat, hadj, ramadan

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This work becomes with methodological rigor a part of the innovative proposals for the characterization of the areas at risk of desertification. The complexity of the phenomenon of desertification, which involves extended surfaces in all continents, is one of the most alarming processes of the environmental degradation of our Planet and threatens the health and the living conditions of over a billion of persons. The food crisis, in continuous increase, ask for the world of research to urgently supply reassuring solutions concerning the acquisition of indicators, which are easy to monitor and concur to control the phenomenon in order to fight its acceleration. The constant but different combination that determines the diffusion of deserti- cation in the territories, attributable mostly to climatic changes and the activities of the man, makes our job challenging and complicated, since it varies from region to region. We are aware of all this and therefore we think that the methodological approach of survey of the data is an extremely important element to locate of the phenomenon and to monitor its course. This work, which is characterized for its multi-disciplinary approach, suggests solutions that we wish will quickly find concrete applications at international level. Prof. Bruno Dettori President CNLSD (Comitato Nazionale per la Lotta alla Siccità e alla Desertificazione) v

Geodesy. Cartography --- Meteorology. Climatology --- Environmental protection. Environmental technology --- Physical geography --- geodesie --- fotogrammetrie --- milieutechnologie --- fysische geografie --- klimaatverandering

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Aghlabids. --- Art, North African --- Architecture --- Material culture --- History --- Africa, North --- Civilization. --- Art, North African.