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HEAT – MECHANICAL DEGRADATION OF SURFACES AT THE HIGH TEMPERATURES
Zahradník, Radek ; Hajduk, Daniel (referee) ; Čecho, Ladislav (referee) ; Toman,, Zdeněk (referee) ; Raudenský, Miroslav (advisor)
The Ph.D. thesis is focused on a surface degradation mechanisms under combined heat and mechanical load. The objects of examination are work rolls from hot rolling mill which suffer such a load. In first chapter, the hot rolling process, the design, the manufacturing process and present materials of work rolls are described. The state-of-the-art study of work roll surface degradation mechanisms – wear, oxidation, thermal and contact fatigue are described in the second chapter. The characterization, the formation, the mechanisms of progression and the effects of each surface degradation mechanism is described step by step. The state-of-the-art study of analytical and numerical models which are related to hot rolling process is described in third chapter together with their limitations and flaws. The next chapters contain design of an analytical, an optimized macroscopic and a microscopic model for study of the work roll stress state. The macroscopic and the microscopic model is based on finite element method and they are implemented in ANSYS Programming Design Language. The models are used to process several case study which are based on previous experimental work of the Heat transfer and fluid flow laboratory. The results from case studies specify and expand the knowledge of work roll stress state. The results show the portion of each loading factor on the whole stress state. In addition, time and depth depended distribution of stress state is presented. The results from macrosferic model illustrate the cause of spalling and a rupture of the work roll. The results from the microsferic model show the cause of creation of the to-surface-parallel cracks within carbides of high chromium irons. Last chapter summarized of all results gathered from case studies together with the goals for further research definition. The necessary steps for further cognition are stated. The thesis contains a large set of appendixes with deeper discussion of several related topics. These appendixes represent the one third of whole the thesis.
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Marketing Audit of a Company
Ermolin, Daniil ; Havíř, David (referee) ; Chalupský, Vladimír (advisor)
The master‘s thesis deals with marketing auditing of company Tungaloy Rus with a special focus on its employees’ satisfaction. The theoretical part of the thesis defines the meaning and importance of marketing audit, as well as the concept of employees’ satisfaction and modern approaches to its measurement. The analytical part of the thesis focuses on performing the marketing audit of company Tungaloy Rus and surveying the satisfaction of its employees. The proposal part of the thesis aims to making a set of recommendations based on the results of the marketing audit and the satisfaction research, which leads to improving the company's marketing activities.
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Problems of alcoholism in relation to working life
Kohoutová, Jana ; Gruber, Jan (advisor) ; Janiš, Kamil (referee)
The bachelor thesis deals with the problems of alcoholism in relation to working life. First, the attention is paid to alcoholism itself in terms of its conception, process and an individual who suffers from it. Then the thesis focuses on three possible causes of alcoholism associated with working life, which are stress, tolerant environment to alcohol consumption and unemployment. The attention is also aimed at high-risk professions of hospitality workers, laborers, medics and artists; it also deals with the impact of alcoholism on job performances of both an alcoholic and his colleagues. The thesis is also concerned with the problem of alcohol in the workplace in terms of the Labour Code and the employer sanctions. This topic is illustrated by a specific example of an employer procedure in addressing problems with alcohol in the workplace. Besides, the thesis addresses the issue of alcoholism prevention in connection with working life. In the end, the theoretical findings are illustrated by an alcoholic's work experiences as well as with the perspective of an individual who was in a close working contact with an alcoholic.
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Marketing Audit of a Company
Ermolin, Daniil ; Havíř, David (referee) ; Chalupský, Vladimír (advisor)
The master‘s thesis deals with marketing auditing of company Tungaloy Rus with a special focus on its employees’ satisfaction. The theoretical part of the thesis defines the meaning and importance of marketing audit, as well as the concept of employees’ satisfaction and modern approaches to its measurement. The analytical part of the thesis focuses on performing the marketing audit of company Tungaloy Rus and surveying the satisfaction of its employees. The proposal part of the thesis aims to making a set of recommendations based on the results of the marketing audit and the satisfaction research, which leads to improving the company's marketing activities.
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Foreign service of Czechoslovak and Czech diplomats in the 1980s and 1990s
Mezlíková, Pavla ; Krátká, Lenka (advisor) ; Hlaváček, Jiří (referee)
In the Master thesis I deal with the topic of the professional and personal life of diplomats working at the Ministry of Foreign Affairs of the Czechoslovak Socialist Republic/Czech and Slovak Federative Republic and Czech Republic in the 1980's and 1990's. In the background of historical context it is focused on performing of diplomats foreign duties, working issues, achievements and challenges, everyday routine will not be omitted. Specifically it will reflect themes of preparing to leave abroad, to socialize in given country, everyday duties, family life and a free time. Primary source of the Master thesis will contain of the interviews led by method of oral history.
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Analysis of Variables Impacting the Status of Single Mothers on the Labour Market
Kolmistrová, Aneta ; Záškodná, Helena (advisor) ; Kuchař, Pavel (referee)
This thesis is trying to find out what variables could affect the situation of single mothers on the labor market in the Czech Republic. First, there are identified nine variables that can affect their position on the labor market. Analysis of these variables leads to its subsequent division into two groups - individual and objective. In the context of individual variables, the focus is on a financial and material situation, support of wider family, job aspirations and a need for harmonization of work and personal life of single mothers. As objective variables is dealt with the social and family policy, possibilities of preschool and school facilities, access of an employer in terms of using a family-friendly approach and a risk of discrimination, a risk of unemployment. The subsequent empirical survey with the qualitative design utilizes personal experiences of single mothers from their activity on the labor market in the context of selected variables. Evaluation of the survey confirms six out of nine effects such as influencing variables. The thesis concludes evaluating of all the facts while there is a further demonstration of possible extension of this investigated issue. Key words: single mother, family, working life, personal life, harmonization, labor market
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Problems of alcoholism in relation to working life
Kohoutová, Jana ; Gruber, Jan (advisor) ; Janiš, Kamil (referee)
The bachelor thesis deals with the problems of alcoholism in relation to working life. First, the attention is paid to alcoholism itself in terms of its conception, process and an individual who suffers from it. Then the thesis focuses on three possible causes of alcoholism associated with working life, which are stress, tolerant environment to alcohol consumption and unemployment. The attention is also aimed at high-risk professions of hospitality workers, laborers, medics and artists; it also deals with the impact of alcoholism on job performances of both an alcoholic and his colleagues. The thesis is also concerned with the problem of alcohol in the workplace in terms of the Labour Code and the employer sanctions. This topic is illustrated by a specific example of an employer procedure in addressing problems with alcohol in the workplace. Besides, the thesis addresses the issue of alcoholism prevention in connection with working life. In the end, the theoretical findings are illustrated by an alcoholic's work experiences as well as with the perspective of an individual who was in a close working contact with an alcoholic.
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HEAT – MECHANICAL DEGRADATION OF SURFACES AT THE HIGH TEMPERATURES
Zahradník, Radek ; Hajduk, Daniel (referee) ; Čecho, Ladislav (referee) ; Toman,, Zdeněk (referee) ; Raudenský, Miroslav (advisor)
The Ph.D. thesis is focused on a surface degradation mechanisms under combined heat and mechanical load. The objects of examination are work rolls from hot rolling mill which suffer such a load. In first chapter, the hot rolling process, the design, the manufacturing process and present materials of work rolls are described. The state-of-the-art study of work roll surface degradation mechanisms – wear, oxidation, thermal and contact fatigue are described in the second chapter. The characterization, the formation, the mechanisms of progression and the effects of each surface degradation mechanism is described step by step. The state-of-the-art study of analytical and numerical models which are related to hot rolling process is described in third chapter together with their limitations and flaws. The next chapters contain design of an analytical, an optimized macroscopic and a microscopic model for study of the work roll stress state. The macroscopic and the microscopic model is based on finite element method and they are implemented in ANSYS Programming Design Language. The models are used to process several case study which are based on previous experimental work of the Heat transfer and fluid flow laboratory. The results from case studies specify and expand the knowledge of work roll stress state. The results show the portion of each loading factor on the whole stress state. In addition, time and depth depended distribution of stress state is presented. The results from macrosferic model illustrate the cause of spalling and a rupture of the work roll. The results from the microsferic model show the cause of creation of the to-surface-parallel cracks within carbides of high chromium irons. Last chapter summarized of all results gathered from case studies together with the goals for further research definition. The necessary steps for further cognition are stated. The thesis contains a large set of appendixes with deeper discussion of several related topics. These appendixes represent the one third of whole the thesis.
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