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Mutual interaction of pressure pulsations and pulsations of undirect pipe
Hrazdíra, Zdeněk ; Pochylý, František (referee) ; Habán, Vladimír (advisor)
This thesis deals with mathematical modeling of multiphysics FSI (fluid-structure interaction) problem, describing mutual interaction of pressure pulsations and vibrations of indirect pipe in a 2D region. Firstly, physical partial differential equations are derived separately for both media, which are in turn coupled and solved analytically. Results of mentioned models include natural frequency values, amplitude-frequency characteristics and both natural and driven damped oscillations of pipe and liquid.
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Vplyv kyseliny jasmónovej na rast a vývoj rastlín v odpovedi na zmenené hladiny endogénnych cytokinínov
Perašínová, Nikola
Plant hormones act as messengers of intracellular and extracellular signals in the plant cell that regulate various developmental processes. The main plant hormones participating in intracellular and extracellular signal transduction pathways are, among the others, cytokinins (CK) and jasmonic acid (JA). The role of both hormones in plant development is well-known, whereas their mutual interactions remain rudimentary. In this thesis, we have found that elevated JA levels contribute to enhancing CK sensing by plants. On the other hand, the high levels of CK were found to stimulate expression of transcription factors that play a key role in JA signaling pathway. Our results suggest interesting interaction network of two plant hormones, which participate in abiotic and biotic stress responses. These findings offer a novel universal method for the sustainable agriculture that raises demands for stress-tolerant crop species.
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Mutual interaction of pressure pulsations and pulsations of undirect pipe
Hrazdíra, Zdeněk ; Pochylý, František (referee) ; Habán, Vladimír (advisor)
This thesis deals with mathematical modeling of multiphysics FSI (fluid-structure interaction) problem, describing mutual interaction of pressure pulsations and vibrations of indirect pipe in a 2D region. Firstly, physical partial differential equations are derived separately for both media, which are in turn coupled and solved analytically. Results of mentioned models include natural frequency values, amplitude-frequency characteristics and both natural and driven damped oscillations of pipe and liquid.
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