Titlebook: A Chronology of the Byzantine Empire; Timothy Venning Book 2006 Palgrave Macmillan, a division of Macmillan Publishers Limited 2006

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,868–1066, plant and insect growth. It is proved that pesticides can promote the development of modern agriculture. However, most pesticides, if not used properly, will not only cause waste but also lead to poisoning accidents and harmful effect for human and animal health. In recent years, many researches ha

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,1067–1204, at which nitrogen gas liquifies, namely, 77 K or –196°C. Within months of the discovery, a wide variety of experimental techniques were brought to bear in order to measure the properties of these materials and to gain an understanding of why they superconduct at such high temperatures. Among the te

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,1205–1261, usually been computed by formulations based on the reduced scalar potential, its combination with the total scalar potential or on magnetic charges [1, 2, 3]. The magnetic vector potential has been widely used in finite element solution for three-dimensional magnetostatic fields, e.g. [4, 5]. Compa

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