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Study of dynamic effect on a bridge structure with moving loads
Zavřelová, Michaela ; Martinásek, Josef (referee) ; Vlk, Zbyněk (advisor)
The goal of the master thesis is a dynamic parametric study on the dynamic effects of high-speed train using the HSLM-A load model on a railway bridge. The calculation model is processed, in RFEM 5.29.01 with RF-MOVE module and prerelease versions RFEM 6 and RSTAB 9, as a 2D member in the XZ plane. Furthermore, static load cases and load models LM 71 and HSLM-A are created. The HSLM-A load model is processed for universal trains A1-A10, which each cross the railway bridge at a total of 15 speeds ranging from 120 km/h to 400 km/h. A detailed parametric study of the dependence of the maximum deformation and acceleration in the Z direction on the speeds of each train set is performed. Modal and time history analysis is used in the parametric study. Part of the work is to determine the resonance region.
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Circadian rhythms in adipocytes and impact of their disruption
Zavřelová, Michaela ; Sumová, Alena (advisor) ; Spišská, Veronika (referee)
This bachelor thesis deals with circadian rhythms in adipocytes and the consequences of their disruption. The thesis summarizes current scientific knowledge and explores the mechanism of rhythm control at the molecular level, which is formed by transcriptional translational feedback loops. Adipocytes control lipid metabolism through the production of adipokines, adipogenesis, lipogenesis, and lipolysis. The research focuses on how clock genes are involved in these processes. All of these events, which are characteristic of adipocytes, are highly regulated and the genes that are involved in them are transcriptionally activated by clock gene proteins. Circadian rhythms are an integral part of our lives, and desynchronization of rhythms between the main oscillator, which is the suprachiasmatic nuclei, and peripheral adipocytes can lead to metabolic disorders, which in turn can lead to obesity, insulin resistance, or type 2 diabetes. Obesity is one of the biggest problems of modern society, and disrupted circadian rhythms due to today's lifestyle are one of the causes of its development. Key words: circadian rhythms, clock genes, adipocytes, obesity, PPARγ, adipogenesis, lipogenesis, lipolysis, leptin, adiponectin
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