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Gravitational sources in the vicinity of black holes
Kotlařík, Petr ; Semerák, Oldřich (advisor) ; Hackmann, Eva (referee) ; Mach, Patryk (referee)
Black holes are among the most intriguing objects in the Universe. When isolated and stationary, they are described by the simple Kerr(-Newman) metric. However, astro- physical black holes are seldom isolated; in fact, we can only know of them through their interaction with the environment. Consequently, the actual gravitational field differs from the Kerr(-Newman) ideal. This thesis investigates the influence of the environment on the gravitational field of black holes. In the stationary (or static) and axially symmet- ric setting, we derive several analytical models describing a black hole surrounded by a disc or ring. The static problem is solved exactly, yielding the metric in closed form in some cases. Besides the basic physical properties of the results, we analyze the scalar- field quasinormal modes in such a deformed black-hole geometry. Our findings indicate a universal behaviour of the QNM response, which may help in distinguishing the envi- ronmental effects from those of modified theories of gravity. In the stationary case, we employ perturbation theory in the tetrad formalism. By introducing the Debye potential, we find the electromagnetic field of a ring source on the rotating black-hole background. We conclude with a discussion of similar treatment of gravitational perturbations. 1
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Thin plasma polymer films on metal substrates
Mach, Pavel ; Salyk, Ota (referee) ; Přikryl, Radek (advisor)
The theoretical part of the thesis is focused on surface treatments, their evaluation from the point of view visual properties, plasma-enhanced chemical vapor deposition and analysis of thin layers prepared by plasma polymerization. The experimental part of the thesis deals with surface treatment of stainless steel AISI 304. Thin layers of pp-HMDSO (plasma-polymer) and of DLC are deposited on the steel´s surface for the purpose of preparing transparent layer, which protect steel´s surface against of making finger prints visible. As an objective method is chosen an immersion test in artificial sweat solution according to standard ČSN EN ISO 105-E04. Evaluation of the test is measured by a gloss-meter and by a colorimeter. Prepared layers are identificated by FTIR method.
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Fuel additives for modern internal combustion engines
Mach, Petr ; Kaplan, Zdeněk (referee) ; Píštěk, Václav (advisor)
This bachelor thesis is devoted to thorough research of fuel additives, especially their effect on deposits in internal combustion engines, wear and service life of the engines and their effect on fuel consumption. The first chapter briefly informs about automotive fuels and explains the used terms in this work. The next chapter describes the types of fuel additives and their use. The third chapter deals with the deposits in the internal combustion engines and their reduction using detergent additives. The fourth chapter focuses on the types of wear and places where arise. This chapter also aims to prove the positive effect of additives on the engine components service life. The last chapter focuses on the fuel consumption and importance of additives in world fuel consumption.
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Design of Turbine Safety Cover for Turbocharger
Mach, Petr ; Kudláček, Petr (referee) ; Novotný, Pavel (advisor)
This diploma thesis deals with the issue related to the burst covers of turbochargers, followed by the design of the safety cover for turbine housing, which works as a protective barrier in case of possible destruction of the turbocharger rotor. The design is created according to current knowledge from the containment testing and requirements for the highest level of safety during turbocharger operation. In this diploma thesis, there are made 2 new variants of burst cover. The first aims at a lower purchase price and it is suitable for applications where it is not necessary to have the highest protection level. The second variant aims to face the strictest conditions and uses reinforced walls, which makes it a more expensive product. For both designs of the burst cover, there is made an analysis of vibrations due to long-term trouble-free operation, which is followed by further modification of the design. In the last part, burst covers are checked for high-cycle material fatigue. The output of this diploma thesis are therefore two new designs of the safety covers that are suitable in terms of vibrations caused by the internal combustion engine.
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Inspection of quality of social services in residential facilities
Bartišová, Lucie ; Baštecká, Bohumila (advisor) ; Mach, Petr (referee)
Inspection of the quality of social services in residential facilities. The main goal of Inspection of the quality of social services in residential facilities is to describe the influence of inspection on quality of standards of service provided in controlled facilities. The thesis is divided in two parts. First part presents theroetical frame of discussed issue based on professional literature. This theoretical frame consists of four chapters which present social services in general, their quality and values, quality of management and inspection of social services. Second part includes qualitative research based on interviews with five respondents. Interviews are focused mainly on respondent's personal experiences. Results of data analysis, their overview and discussion are summarized. Based on data analysis answers to research questions are formulated. Research provides answers to how inspection of quality of social service contributes to better understanding of meaning of standards of quality by employees and how it influences behavior of employees and state of social service in general. Keywords Social services, residential social service, quality, values, quality standards, management, inspection of the quality of social service.
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The Italian Architects from the second half of the 16-th century in the South Bohemia with regards to work of Antonio Ericeri and Baldassare Maggi at the castle buildings in Jindřichův Hradec and Telč
Mach, Pavel ; Nespěšná Hamsíková, Magdaléna (advisor) ; Zlatohlávek, Martin (referee)
Vlašští stavitelé druhé poloviny 16. století v jižních Čechách se zvláštním zřetelem k práci Antonia Ericeri a Baldassara Maggiho na zámeckých stavbách v Jindřichově Hradci a Telči. Diplomová práce. Pavel Mach vedoucí práce: Mgr. Magdalena Nespěšná Hamsíková, Ph.D. - Praha, 2011 - 163 s. Abstract The residences of the Czech and Moravian nobility were form way back symbols of power, representativeness and wealth. As well as it happened in the case of the castle buildings of the Rožmberks and the Lords of Hradec in Jindřichův Hradec and in Telč. Rows of Vlachs and other masters, who transformed the character of the then towns in the new renaissance direction according to the desires of the investors and the then construction trends, were coming not only in these places. The names of Vlachs, among which the front place takes Antonio Ericer, Baldassare Maggi, Antonio and Benedetto Domenico Cometta of Giovanni Maria Facconi, ranked in their times not only among the front representatives of construction acts in the dominion of the Rožmberks and the Lords of Hradec in the south of Bohemia and Moravia, but also among the significant masters of the Czech and Moravian architecture ot the 16th and 17th centuries. The to-this-day preserved remarkable palaces and castle compounds are still surrounded with lack of...
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Carlo Valmadi (approx. 1550 - 1620) - a Renaissance Architect in Trutnov Area
Mach, Pavel ; Zlatohlávek, Martin (advisor) ; Kropáček, Jiří (referee)
Carlo Valmadi (about 1550 - 1620) - a Renaissance architect in Trutnov region Theme of this bachelor work is a summary of Carlo Valmadi's building activities. This Italien Renaissance architect worked on Valdštejn lordship - Hostinné steam - from 1572 to 1620. This bachelor work is devided into several chapters. The first chapter describes a coming of Northern Italien builders to Bohemia, in the concrete to Prague. It speaks also about situation in Italy, which starved inhabitants of Northern Italien region into migration to Middle Europe. Next chapter discourses Carlo Valmadi's life. His life is still very unclear and we don't have enough information about him. The second part of this chapter describes Valmadi's coming to Bohemia. Another part speaks about building conditions in Renaissance Prague, especially about Rožmberk and Lobkovic palaces. These two remarkable buildings are connected mainly with Italien builders. And also Carlo Valmadi probably joined in building of Lobkovic palace. Then the chapter discusses coming of this builder to Hostinné region. He came there during rule of Jiří Valdštejn. Jiří Valdštejn's wife Marie Magdalena Lobkovic probably knew Walmadi's work and it's possible, that she invited Valmadi into this region. Marie Magdalena's father was a builder of Lobkovic palace...
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Regulation of commercial banking by the central bak
Mach, Petr ; Kotáb, Petr (advisor) ; Boháč, Radim (referee)
- 70 - 10 Resumé Regulation of commercial banking by the central bank This diploma thesis deals with regulation and supervision of a commercial banking. It is focused on changes which were made in this area during the last several years. The next purpose of the thesis is evaluation of reforms which are proposed as an answer to the present financial crisis. In an introductory passage I generally define regulation and supervision of the commercial banking, refer to organizations which have key importance in the banking regulation, enlarge upon risks to financial stability of commercial banks (credit, operational, likvidity, interest rate, capital and market risk), introduce causes for existence of the banking regulation and mention its objectives. Next I deal with particular methods of the regulation, for example a minimum capital requirements, a financial reporting and desclosure requirements, large exposures restrictions, a deposit guarantee or position of the central bank as a lender of last resort. The main part of the thesis is focused on descriptions of changes which were made during the past few years and after that I evaluate drafts that are proposed as a answer to financial crisis which has last from 2007. Main changes are connected with an approval and an implementation of a new capital adequacy...
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