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Porovnání sezónních změn v distribuci impedance dřeva a sestavení vzorníku pro vyhodnocování snímků elektrického impedančního tomografu
Chmel, Ladislav
The bachelor thesis deals with physical principles of the electrical impedance tomograph Picus (EIT). Moisture distribution in different tree species, norway spruce (Picea abies), silver birch (Betula pendula), pedunculate oak (Quercus robur) and thein seasonal change. Measurement is always carried out on the same thirty trees, fifteen trees from the urban environment and fifteen trees from the forest environment. Tomography measurements are proceed every month of the year, I have drawn up a swatch tomography from these results to evaluace images made by the device. Changes distribution of the impedance wood are compared among the tree Gross and thein habitats.
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Insects as a model group of organisms for the research of knowledge about and attitudes to invertebrate animals
Jelínek, Filip ; Mourek, Jan (advisor) ; Janšta, Petr (referee)
This thesis is a literature review that aims to process the available literature on attitudes towards insects, knowledge about insects and the ways in which the perception of insects by humans can be influenced. In the chapters focused on attitudes towards insects, I show how the emotions of disgust and fear lead to negative views of insects and, conversely, how the perception of their beauty and importance promotes positive views of insects. In the knowledge section, I show how people confuse true information about insects with myths, inaccurately distinguishing between what is an insect and what is not, which insects are dangerous and which are not. In the last chapters, I present the literature that deals with the ways in which attitudes towards insects and knowledge about insects can be influenced. I deal with the effect of urbanization, experiential educational programs and the picture of insects in human culture, namely in language, poetry, fictional literature and fine arts
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Aerodynamic components of passenger cars
Petrskovský, Adam ; Vančura, Jan (referee) ; Vondruš, Jan (advisor)
This bachelor thesis is focused on aerodynamics of the cars. Theories on aerodynamics characterizations as well as force exertions are presented here. Moreover, the influence of aerodynamics on fuel consumption and formation of harmful emissions is described. The thesis also provides a comprehensive overview of particular aerodynamic devices used on cars. Furthermore, CFD simulations of four aerodynamic devices on a simplified model of car are included. The results of these simulations are then evaluated and the respective aerodynamic devices are subsequently compared to find out which of them has contributed the most to the improvement of aerodynamic characteristics of the vehicle.
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Modern Cooling Concepts of Electrical Machines
Lukášek, Jan ; Cipín, Radoslav (referee) ; Toman, Marek (advisor)
The thesis focuses on the research of modern concepts of cooling of electrical machines. The first part of the thesis deals with the origin and calculation of losses causing heating of electrical machines. The second part describes the mechanisms of heat transfer and basic relations of fluid mechanics. The third part describes the basic principles of cooling of electrical machines. The final part of the thesis describes modern concepts and innovations in cooling systems for electrical machines described in the third part and separate modern innovations.
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Measuring RLC on the components of electrical circuits
Pokorný, Marek ; Vítek, Ondřej (referee) ; Veselka, František (advisor)
Aim those work is inform numerator about possibilities and features gauging apparatus 7600 Precision LCR undergrounds and further then about metering paramers R,L,C on components electric standing ,especially then on sliding contacts,with which this work acquaint and how are their characteristics important for correct functionality electrical machine whereof are site rated power.Warp work largely start from manual to apparatus 7600 Precision LCR undergrounds and further then out publication sliding contact in electrical machine - doc. Veselka, doc. Chmelik.
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