|
|
Diagnostics of thin layer deposition using dimethylphenylsilane monomer
Procházka, Michal ; Kudrle, Vít (referee) ; Krčma, František (advisor)
The aim of this thesis is a study of processes during organosilicone thin film deposition via plasma polymerization. Recently, thin films are the most expanding way of surface modification of materials. They are used as protective coatings, functional layers, they can increase or decrease adhesion to different compounds (e.g. water), or just improve mechanical properties of bulk materials. Plasma polymers, which are not known so long, are a modern trend in evolution of thin film deposition. They have perfect adhesion to the substrate and they are highly resistant against most of chemical compounds. Their structure is quite different from the structure of classical polymers. Recently, organosilicon compounds are used as precursors for plasma polymers because silicon built in the structure of plasma polymer allows thin film deposition on glass substrate and the organic part of monomer gives us infinite possibilities of modification. In our case dimethylphenylsilane (DMPS) was used as a monomer. Various RF low pressure discharges were used during this study. Plasma diagnostic was performed by optical emission spectroscopy of inductive coupled plasma. This method allows us to determine plasma composition during the deposition process. Thus we can predict the composition of deposited thin film according to input parameters. From relative populations of fragments we are able to find out optimal conditions for deposition process. We can also calculate temperature of particles in plasma which gives us some information about particle energies. The first part of the study deals with the identification of particles (fragments) created by fragmentation of monomer in plasma environment. We successfully identified hydrogen atomic lines of Balmer’s series in the spectra. Many rotational lines of hydrogen molecule were also detected. Atomic carbon occurred only in small amount. Much more carbon was detected in the form of CH radical. We also found some weak lines connected to atomic silicon. When we used a mixture of DMPS and oxygen, OH radical and O2+ were present in spectra. Next, optimal settings of deposition were determined for particular fragments from relative intensities of these fragments in optical emission spectra. Using this information we are able to set up the process to deposit thin films of desired composition and properties. We calculated electron temperature from intensities of hydrogen lines in Balmer’s series. Rotational temperature was obtained from CH radical intensity. Unfortunately, there was no convenient radical from which intensity we would be able to calculate vibrational temperature. All results and information obtained during the research can be used in industrial plasma polymerization processes and development of new coatings and functional thin films. Other studies on DMPS or similar monomer may also be realized to get more knowledge about processes in plasma and this thesis could serve as a basis for further research. Moreover, this study is a part of an international project. The aim of this project is to study processes during plasma polymerization both theoretically and practically. Once finished, the project and its results will be presented in scientific literature and at international conferences.
|
|
|
Actual trends in manufacturing of permanent patterns
Procházka, Michal ; Bouška, Ondřej (referee) ; Horáček, Milan (advisor)
This bachelor thesis deals with the more detailed description of various methods employed for the manufacturing of permanent patterns which are used for making of nonpermanent moulds. According to the type of materials the models are divided into the wooden, the metallic, the plastic and the models made from the resin. The work covers the description of handmade manufacturing which is performed either manually (generally in case of wooden models) or by conventional methods of machining. It also includes the CNC machining mostly used for the manufacture of larger models. Further, certain methods Rapid prototyping are described here but these methods are restricted in sizes of future model, as they are used for the models of smaller measurements. Finally, the newer methods including the methods of Additive manufacturing are also described in the work.
|
|
|
Piston of 4-storke supercharged SI-engine for passenger car
Procházka, Miloslav ; Dundálek, Radim (referee) ; Svída, David (advisor)
This thesis is engaged in a design of basic dimension of four-stroke four- cylinder DI (direkt injection) petrol engine. It is also engaged in a design of basic dimension of crank mechanism and in a design of piston dimension. Next suggestion is related to dangerous section check. The sequential multipoint injection and boosting will be supposed for the suggestion calculation. Part of this thesis is focused on the engine development and a piston cluster detail description.
|
|
| |
|
|
Detection methods of energetic materials
Procházka, Michal ; Diviš, Pavel (referee) ; Friedl, Zdeněk (advisor)
A research on current methods of detection of explosives and related materials was made. At first the thesis studies methods of detection and analysis of explosives including chromatographic methods (TLC, GC, HPLC, IC), mass spectrometry and its variations, ion mobility spectrometry and infra-red spectroscopy. Next the attention is placed on detection of explosives in solid phase by X-ray detection, nuclear magnetic and quadrupole resonance and thermal neutron activation. Practical applications of these methods are of great importance in this thesis as well as their usage in the counterterrorist fight.
|
|
|
Implementation of the international concept Costa Coffee on the Czech market in the form of franchising
Procházka, Michal ; Halík, Jaroslav (advisor) ; Motyčková, Hana (referee)
This bachelor thesis presents a theoretical overview of franchising, its functions and other necessary related elements. It considers the implementation of an international concept on the Czech market through franchising. It focuses on the coffee industry, particularly at the Costa Coffee company, as an example of an established international concept. Furthermore, this thesis describes the structure and the development of this concept on the Czech market. On the basis of this concept the core attributes which are essential for a successful development of an international franchise concept are identified.
|
|
| |
|
|
Economics of the football club Mancherster United F. C.
Procházka, Martin ; Kotáb, Jiří (advisor) ; Ščiklin, Alexandr (referee)
The main aim of this Bachelor's thesis is to assess economic situation of the football club Manchester United F. C. and to compare it with competing clubs in the period from 2009 to 2013. The partial aim is to assess fulfilment of the new UEFA Financial Fair Play Regulations. The theoretical part states specific characteristics of the economics of sports clubs. Furthermore, it describes the content of the UEFA Financial Fair Play Regulations. It is followed by description of the methods and indicators of financial and economic analysis. The practical part is focused on analysis of economic situation of the football club Manchester United F. C.
|
|
|
Impairment testing of assets according to IFRS
Procházka, Michal ; Müllerová, Libuše (advisor) ; Vašek, Libor (referee)
The main object of this thesis is to show measurement of assets and its changes under International Financial Reporting Standards with closer focus on impairment testing according to IAS 36 - Impairment of Assets. The first part of the thesis introduces definition of assets and possible measurement bases used at first time recognition and reporting date. The main part deals with impairment testing of individual assets and cash-generating units. There is described when the impairment testing must be performed, how to determine the size of impairment loss and possibilities of abolishing the impairment loss. At the end of the thesis is analyzed actual impairment test.
|
|
|
Census in selected European countries
Procházka, Matěj ; Langhamrová, Jitka (advisor) ; Říha, Jan (referee)
This thesis deals with the history of census over the years to present. In the 2011 was held last census in the most of European countries. In the following parts of my thesis there are described methods which are used to get data from population. Very important thing is to mention international documents and recommendations which are base for actual census. The history of census in selected European countries is described in the next chapter of the work. The history of Czech census is described more detailed than history of other countries. In the last part of my thesis there is comparison of indicators. The indicators are based on data which was obtained in the last census in 2011.
|
guest ::
