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Coordination of operation of PST transformers in the interconnected region
Tesař, Jan ; Topolánek, David (referee) ; Bátora, Branislav (advisor)
This master’s thesis deals with phase-shifting transformers (PST) and coordination of electrically close devices in an interconnected region. Theoretical research is performed in the work, describing methods of power control, function and design of PST, as well as actual methods of PST coordination in the rest of the world. Based on the research there is an optimalisation algorithm designed in MATLAB, which computes recommended tap petting of PST based on the network configuration. In the second part of this thesis there are described components of this algorithm and also presented the results of three demonstrative scenarios. Algorithm is able to solve minor problems in the network; more complex problems are beyond its solving ability. For an improved functionality there is a necessity to further expand this algorithm by a network redispatch solving algorithm.
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Graphene transfer methods for high quality graphene field effect transistors
Tesař, Jan ; Kormoš, Lukáš (referee) ; Procházka, Pavel (advisor)
This bachelor thesis is focused on the influence of different graphene transfer methods on its quality. Graphene layers were grown by Chemical Vapour Deposition (CVD) method. The quality characterization of subsequently transfered graphene is based on the measurement of charge carrier mobility which has been performed on the field-effect transistors fabricated by transferring of graphene layers onto Si/SiO$_2$ surface. Chemical etching and electrolytic delamination are the transfer methods that are being compared in this thesis. Results of the measurements showed that graphene layers transferred by electrolytic delamination exhibit approximately four times higher charge carrier mobility than those transferred by the chemical etching method.
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Electrical installation in family house
Tesař, Jan ; Procházka, Petr (referee) ; Ondrejček, Vladimír (advisor)
This Bachelor Thesis is concerned with the design of the electrical installation of a family house. There are two main parts of the thesis – theoretical basis and the main design. In the theoretical part the reader is at first introduced to a powerline section, in which the electrical installation from the powergrid to a terminal equipment is described. Next part is about a low voltage wiring, where the commonly used types of wiring and devices are described. In the third part the reader can read about a lightning protection and its inner and outer parts. The main design consist of situational designs of devices and wiring in the house, switchboard designs, revision of the electrical protection and the technical report.
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The Students themselves - Student Center Poříčí
Kálalová, Kateřina ; Tesař, Jan (referee) ; Mikulášek, David (advisor)
The house of the student center complements city block with respect to the unique location on the corner by the river and with the respect to the near dominats, especially the monastery church in the neighborhood. There is a college menza with all facilities and areas for commerce in the ground floor. The upper floors are used for the student dormitory. You can find indoor and outdoor areas for the common activities of studets. The patio is the heart of the house.
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Secondary materials from household waste and their position in the global market
Tesař, Jan ; Šomplák, Radovan (referee) ; Pavlas, Martin (advisor)
The barchelor thesis is focused on the issues of material recovery of municipal waste. The work presents the basic concepts of waste management and resource data to help analyze the current virtual situation in the field of waste management. Work specifies the components with the greatest potential for material recovery. For the selected folder, which can be commonly referred to secondary raw materials, work tries to describe the flow of materials and meet with their potential application in the market.
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Web server with ARM microprocessor
Tesař, Jan ; Vařacha, František (referee) ; Prokeš, Aleš (advisor)
Diploma thesis is dealing with design and implementation of the web server and manage- ment website in the developing kit FriendlyARM Mini6410 with installed OS GNU/Linux. The embedded packaging system PTXdist is described in terms of Kernel configuration and selection of suitable applications. The device should be later used for the remote management of atmospheric optical link.
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Fabrication and characterization of atomically thin layers
Tesař, Jan ; Kunc, Jan (referee) ; Procházka, Pavel (advisor)
Tato práce se zabývá oblastí dvourozměrných materiálů, jejich přípravou a analýzou. Pravděpodobně nejznámějším zástupcem dvourozměrných materiálů je grafen. Tento 2D allotrop uhlíku, někdy nazývaný „otec 2D materiálů“, v sobě spojuje neobyčejnou kombinaci elektrických, tepelných a mechanických vlastností. Grafen získal mnoho pozornosti a byl také připraven mnoha metodami. Jedna z těchto metod však stále vyniká nad ostatními kvalitou produkovaného grafenu. Mechanická exfoliace je ve srovnání s jinými technikami velmi jednoduchá, takto připravený grafen je však nejkvalitnější. Práce je také zaměřena na optimalizaci procesu tvorby heterostruktur složených z vrstev grafenu a hBN. Dle prezentovaného postupu bylo připraveno několik van der Waalsových heterostruktur, které byly analyzovány Ramanovskou spektroskopií, mikroskopií atomových sil a nízkoenergiovou elektronovou mikroskopií. Měření pohyblivosti nosičů náboje bylo provedeno v GFET uspořádání. Získané hodnoty pohyblivosti prokázaly vynikající transportní vlastnosti exfoliovaného grafenu v porovnání s grafenem připraveným jinými metodami. V práci popsaný proces přípravy je tedy vhodný pro výrobu kvalitních heterostruktur.
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The Students themselves - Student Center Poříčí
Klinkovský, Lukáš ; Tesař, Jan (referee) ; Mikulášek, David (advisor)
The subject of this work is urban and architectural design of buildings of a city in Brno or a new object. Solved plot is situated at the crossing of the road running along the embankment of the river and most Svratka radial direction to Vienna. Given the character of the building, which is designed as student housing, I proposed a simple and straightforward structure that does not exceed its scale neighborhood. The construction is possible someone may seem brutal and insensitive, but concrete is characterized by austerity, frugality, hard work and humble approach the student in preparation for his mission in life. It is not a palace, but the "monastery"for students.
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Reducing emissions of SO2 in the flue gas from the fluidized bed boiler
Tesař, Jan ; Jecha, David (referee) ; Brummer, Vladimír (advisor)
Aim of this thesis is to design a technology of a flue gas desulphurization of fluidized bed boiler. Currently, the state of technology is not able to provide flue gas desulphurisation to required level. For this reason it is necessary to build additional device for the desulphurisation. Theoretical part of the thesis deals with the emission limits of sulphur dioxide, available methods of desulphurization and sorbents suitable for the desulfurization. In practical part conditioned dry sorption method is chosen for the specified source, technological and structural design for suggested desulphurization technology including design of all device is proposed. The thesis also includes a technology design and a 3D model.
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