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Slender structural systems liable to unstable buckling usually become unstable at load levels lower than the linear buckling load of the perfect structure. In some cases, experimental buckling loads can be just a small fraction of the theoretical critical load. This is mainly due to the imperfections present in real structures. The imperfection sensitivity of structures under static loading is well...
We investigate a model for anaerobic digestion, a process used to produce biogas. The model, introduced in Weedermann et al. (J Biol Dyn 7:59–85, 2013), consists of differential equations describing the interactions of microbial populations involved in three main stages of anaerobic digestion: acidogenesis, acetogenesis, and methanogenesis. We show that this model predicts that an increased yield...
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