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Absence
Machač, Petr ; Marenčík, Michal (referee) ; Zet, Martin (advisor)
Video Absence reflects the findings of theoretical thesis named Boredom. The basic situation is described as lack of meaning, will, interest and feeling. Video is an attempt at poetic reflection of such situation, which is characterised as aimless searching without finding. The main tools are empty hands and different kinds of ground. The void has been overcome through the gesture related to problem of gift.
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Passivation of Aluminum and Aluminum Alloys in passivation baths without Cr6+ Compounds
Macháč, Pavel ; Tulka,, Jaromír (referee) ; Molliková, Eva (advisor)
This diploma thesis deals with evaluation of efficiency of protection conversion coatings created by passivation metals and alloys in passivation baths without chromium compounds. The theoretical part is initially concerned with question of electrochemical corrosion of metals, consequently there are mentioned different methods of corrosion protection. The main section of theoretical part of this thesis deals with chromate conversion coatings, description of their protective efficiency (including their unique self-healing effect) and then with account of new chromate-free conversion coatings occurring as chromate alternatives, whose usage is constrained because of their content of hexavalent chromium, which is highly toxic, oxidizing and also carcinogenic and thereby very dangerous for human body and the environment. Experimental part of this thesis is concerned with evaluation of efficiency of particular conversion coating which is quite commonly use in some applications as chromate alternative. It is chromate-free conversion coating which is created by passivation of metals or alloys in passivation bath Pragokor BP, which contains zirconium fluorocomplexes and is without any chromium or other toxic or ecologically unhealthy compounds. The influence of sealing of the coating in preparation Pragokor Seal Al and also other surface treatments such as application of conservation wax WAXENG or cold application of zinc coating were tested too. Efficiency of mentioned surface treatments was then evaluated on aluminum and steel by laboratory accelerated and atmospheric corrosion testing.
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Calculation of the network steady state on the voltage level 110 kV
Macháč, Petr ; Vaculík, Petr (referee) ; Mastný, Petr (advisor)
This thesis deals with load flow calculation of electrical network 110 kV before and after the connection to the 70MW gas supply and the 58MW steam and gas supply. This grid can be powered from two 400/110kV substations, namely Sokolnice and Otrokovice. The load flow calculation is realized for the power supply either from Otrokovice or Sokolnice. Furthermore, the calculation of the uni-phase and three phase short circuits in the substations of 110kV network is realized in this thesis. The result of the thesis is the assessment of the voltage ratio in the network, current load of the power line and short circuit resistance of the substations.
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Thermodynamics of Solutions
Macháč, Pavel ; Münsterová, Eva (referee) ; Molliková, Eva (advisor)
This bachelor thesis deals with principles of thermodynamics of solutions. The theoretical part is initially concerned with question of solutions generally, such as for example the issue of classification of solutions, expression of solutions composition and a range of mutual solubility. The pivotal part of this document deals with solid solutions, mainly from the thermodynamic point of view. Specifically the issue of thermodynamic activity of components in these solutions is highlighted. There is a detailed description of the ways of determination of the thermodynamic activity, both experimentally and through the use of calculation. Finally there are described the possibilities of the use of the thermodynamic activity, such as for example using it to calculate the other thermodynamic quantities. The practical part of this thesis includes calculation of the thermodynamic activity of components of alloy Bi-Mg at assigned temperature, the partial molar dissolving free enthalpy of components in solution and the calculation of total dissolving free enthalpy of the solution.
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Interaction of financial market and real economy
Macháč, Peter ; Sedláček, Jiří (advisor) ; Veselková, Alexandra (referee)
The aim of my diploma thesis is to analyze basic theoretical approach and description of financial market. In a first stage I will describe basic functions, regulation methods and structure. After that I am going to focus on particular analysis methods, which are used as a price prediction tools. Main part of thesis consist of description of current disproportional relationship between stock market prices and real economic development. I will mainly focus on reasons and following implications of this disproportion.
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