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Steel is an important material in various applications. It has a complex material behaviour which is, in addition to elastic and plastic effects, basically characterised by phase transitions. An important feature in this context is the transformation-induced plasticity, which arises during phase transitions and leads to a permanent deformation at deviatoric stress. Coupled models for the material behaviour of steel, which describe phase transitions in addition to the temperature and the deformation, have been insufficiently investigated in a strict mathematical and numerical context so far. This thesis deals with mathematical modelling, analysis and numerical simulation of processes involved...
The State of the World's Biodiversity for Food and Agriculture presents the first global assessment of biodiversity for food and agriculture worldwide. Biodiversity for food and agriculture is the diversity of plants, animals and micro-organisms at genetic, species and ecosystem levels, present in and around crop, livestock, forest and aquatic production systems. It is essential to the structure, functions and processes of these systems, to livelihoods and food security, and to the supply of a wide range of ecosystem services. It has been managed or influenced by farmers, livestock keepers, forest dwellers, fish farmers and fisherfolk for hundreds of generations. Prepared through a participa...
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