Featuring original research from well-known experts in the field of sliding mode control, this book presents new design schemes for a useful and practical optimal control with very few impractical assumptions. The results presented allow optimal control theory to grow in its applicability to real-world systems. On the cutting-edge of optimal control research, this book is an excellent resource for both graduate students and researchers in engineering, mathematics, and optimal control.
The enhanced biological removal of phosphorus (EBPR) is a popular process due to high removal efficiency, low operational costs, and the possibility of phosphorus recovery. Nevertheless, the stability of the EBPR depends on different factors such as: temperature, pH, and the presence of toxic compounds. While extensive studies have researched the effects of temperature and pH on EBPR systems, little is known about the effects of different toxic compounds on EBPR. For example, sulphide has shown to inhibit different microbial activities in the WWTP, but the knowledge about its effects on EBPR is limited. Whereas the sulphide generated in the sewage can cause a shock effect on EBPR, the continuously exposure to sulphide potentially generated in WWTP can cause the acclimatization and adaptation of the biomass. This research suggests that sulphate reducing bacteria can proliferate in WWTP, as they are reversibly inhibited by the recirculation of sludge through anaerobic-anoxic-oxic conditions. The research enhances the understanding of the effect of sulphide on the anaerobic-oxic metabolism of PAO. It suggests that the filamentous bacteria Thiothrix caldifontis could play an important role in the biological removal of phosphorus. It questions the ability of PAO to generate energy from nitrate respiration and its use for the anoxic phosphorus uptake. Thus, the results obtained in this research can be used to understand the stability of the EBPR process under anaerobic-anoxic-oxic conditions, especially when exposed to the presence of sulphide.
This coauthored monograph examines how business groups have interacted with state authorities in the three central Andean countries from the mid-twentieth century through the early twenty-first. This time span covers three distinct economic regimes: the period of state-led import substitutive industrialization from the 1950s through the 1970s, the neoliberalism of the 1980s and 1990s, and the post-neoliberal period since the earlier 2000s. These three countries share many similarities but also have important differences that reveal how power is manifested. Peru has had an almost unbroken hegemony of business elites who leverage their power over areas of state activity that affect them. Bolivia, by contrast, shows how strong social movements have challenged business dominance at crucial periods, reflecting a weaker elite class that is less able to exercise influence over decision-making. Ecuador falls in between these two, with business elites being more fragmented than in Peru and social movements being weaker than in Bolivia. The authors analyze the viability of these different regimes and economic models, why they change in specific circumstances, and how they affect the state and its citizens.
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