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Most of the inhabitants of the Swedish valley of Älvdalen still speak Elfdalian, an ancient language with strong links to the Vikings' Old Norse. How it has managed to persist to this day remains a mystery because the community has never been completely isolated. In 1668 events in Älvdalen sparked the birth of the Swedish witch-hunts, when 20 women and one man were executed on the basis of testimonies provided by witnesses who were mainly children. The first witch-story involved a girl from Älvdalen called Gertrud who had been reported for walking on water, a story which later spread via a famous illustration, first to Germany and then further afield to Salem, Massachusetts.0In 1935 a man called Tenn Lars Persson (1878-1938) spoke on national radio in Elfdalian about sorcery and the Black Book of Magic. An avid collector of local history, he photographed his community extensively but he also used photography in his astronomy and physics experiments, which included building a telescope and photographing the moon. Between 2001 and 2017 Maja Daniels, a photographer and sociologist with family ties to Älvdalen, began working in the region, inspired by the current generational shift, where negotiations and tensions between modern lifestyles and tradition including the preservation of a strong cultural identity, imbued with mysticism, represent an important contemporary struggle.

artistieke fotografie --- Daniels, Maja --- Sweden --- Älvdalen

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This volume focuses on research and practical issues linked to Calcined Clays for Sustainable Concrete. The main topics are geology of clays, hydration and performance of blended system with calcined clays, alkali activated binders, applications in concrete and mortar, durability of concrete under various aggressive conditions, and economic and environmental impacts of the use of calcined clays in cement based materials. This book compiles the different contributions of the 2nd International Conference on Calcined Clays for Sustainable Concrete, which took place in La Habana, December 5th-7th, 2017.The papers update the latest research in their field, carried out since the last conference in 2015.  Overall it gives a broad view of research on calcined clays and their application in the field of construction, which will stimulate further research into calcined clays for sustainable concrete.

Development aid. Development cooperation --- Economics --- Inorganic chemistry --- Rocks. Minerals --- Materials sciences --- Applied physical engineering --- Building design --- Building materials. Building technology --- mineralogie --- cement --- economie --- bouwkunde --- ontwikkelingssamenwerking --- anorganische chemie --- materialen (technologie) --- duurzame ontwikkeling --- bouwmaterialen