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Electronic ballast for sodium lamp
Eliáš, Jaroslav ; Vorel, Pavel (referee) ; Huták, Petr (advisor)
The aim is to get acquainted with the way the management and regulation of sodium lamps. This knowledge is then applied to design your own gear. The introductory section describes the basic characteristics of discharge light sources. Their behavior was verified by measuring and findings were used to create diagrams, mainly the control circuit. Theoretical design is developed by individual functional parts of the inverter.
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Measurement of light sources heating
Ďurček, Milan ; Škoda, Jan (referee) ; Drápela, Jiří (advisor)
The aim of this work is to inform readers about the heat stress of different parts of the light sources. My project is made up of two parts, theoretical and practical. The theoretical part focuses on the structure, surface temperature, the efficiency of converting electricity to light, the parameters of individual sources and the different ways of measuring temperature increase. In the practical part, a testing method was designed to measure the surface temperature of various types of light sources. The results were collated and subsequently evaluated.
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Analysis of energy and performance parameters of tractor sets for tillage
Masnica, Daniel ; Porteš, Petr (referee) ; Bauer, František (advisor)
This diploma thesis analyzes the influences of individual components and settings on the performance and energy parameters of tractor sets. The theoretical part of the thesis focuses on tractor construction and describes some electronic systems used in modern tractors. It also describes the methodology of field measurements, measuring techniques, and machinery used for the measurements. The practical part of the thesis deals with field measurements of a tractor set with a combined cultivator, a plow, and traction tests of the tractor. From the measured data, various performance and energy parameters are calculated. The results are analyzed, and a discussion is provided.
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Psychohygiene in School and Application of Relaxation Techniques into the Teaching Process at Elementary School
Kohoutová, Tereza ; Komárková, Tereza (advisor) ; Švandová, Martina (referee)
This bachelor work is dealing with the question of psychohygiene in school and application of relaxation techniques into the teaching process at elementary schools. Mental hygiene here is primarily focused on the pupils. This work defines several basic terms regarding to the topic, for example: psychohygiene, mental health, relaxation techniques etc. Primary intention of this work is refer to the necessity to pursue greater attention to the psychohygiene of the pupils since elementary school, due to keeping their mental health in balance, learning how to relax, preventing mental problems, fatigue or exhaustion. Possible symptoms of mental unease of pupils and reasons why it is necessary to care about their mental health are stated in this work. Finally this work offers some relaxation techniques and practices. Part of this work is also suggestion of several relaxation techniques, which would be usable and suitable at school for integration into the educational process. Key words Psychohygiene, mental health, relaxation, relaxation techniques, school, pupil, education process, stress, fear, anxiety, fatigue, ballast
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Electronic ballast for sodium lamp
Eliáš, Jaroslav ; Vorel, Pavel (referee) ; Huták, Petr (advisor)
The aim is to get acquainted with the way the management and regulation of sodium lamps. This knowledge is then applied to design your own gear. The introductory section describes the basic characteristics of discharge light sources. Their behavior was verified by measuring and findings were used to create diagrams, mainly the control circuit. Theoretical design is developed by individual functional parts of the inverter.
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The Blanka tunnel, geological hazadrs and problems during boring
Sedláček, Václav ; Král, Jan (advisor) ; Lešner, Jeroným (referee)
The Blanka tunnel has two boring sections: Brusnice tunnel and Královská obora tunnel. Both tunnels were boring in difficult geologycal conditions, but the geology conditions of these tunnels are not same. Also they had not the same hazards during boring. There was used a spectrum of different technical works with hazard reduction purpose and safety process of boring. There were three serious accidents, wnich everyone made a creater on the surface, but they have not the same causes. This text has a task to describe a geological survey before and during the boring of both tunnels. How other reasons affected the process of boring? How the tunnels were bored? What events preceded the everyone of three major failure? This text does not deal with economical things of boring and effects of specific personal influence on the process of boring. Key words Tunnel, excavation, Blanka, Brusnice, Letná, Stromovka park, Vltava river, underground water, geology, ordovik, New Austrian Tunnelling method, pilot tunnel, calotte, bench, bottom, arche, bolt, lining, grouting, collapse of ceiling, failure, tube, shale, quarzite, soil, loess, ballast, clay
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Psychohygiene in School and Application of Relaxation Techniques into the Teaching Process at Elementary School
Kohoutová, Tereza ; Komárková, Tereza (advisor) ; Švandová, Martina (referee)
This bachelor work is dealing with the question of psychohygiene in school and application of relaxation techniques into the teaching process at elementary schools. Mental hygiene here is primarily focused on the pupils. This work defines several basic terms regarding to the topic, for example: psychohygiene, mental health, relaxation techniques etc. Primary intention of this work is refer to the necessity to pursue greater attention to the psychohygiene of the pupils since elementary school, due to keeping their mental health in balance, learning how to relax, preventing mental problems, fatigue or exhaustion. Possible symptoms of mental unease of pupils and reasons why it is necessary to care about their mental health are stated in this work. Finally this work offers some relaxation techniques and practices. Part of this work is also suggestion of several relaxation techniques, which would be usable and suitable at school for integration into the educational process. Key words Psychohygiene, mental health, relaxation, relaxation techniques, school, pupil, education process, stress, fear, anxiety, fatigue, ballast
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Irregular working hours members of the IZS and their impact on quality of life
KREJČÍ, Ondřej
This bachelor paper describes influence of irregular working time on human organism and psychic as well as on the quality of life as such. This work focuses on the members of the integrated rescue system. Such people are exposed to enormous mental as well as physical ballast during their shifts. Therefore, this thesis deals with basic, topic related terms such as ballast and stress, biorhythms, sleep, sleeping disorders and specifics of work of integrated rescue system members. This paper sets its goal in finding out if and how the irregular working time, especially in case of the night shifts, effects members of the integrated rescue system with regard to some of their life spheres and whether such disbalance affects quality of life. A questionnaire served as the key data collecting method.
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Measurement of light sources heating
Ďurček, Milan ; Škoda, Jan (referee) ; Drápela, Jiří (advisor)
The aim of this work is to inform readers about the heat stress of different parts of the light sources. My project is made up of two parts, theoretical and practical. The theoretical part focuses on the structure, surface temperature, the efficiency of converting electricity to light, the parameters of individual sources and the different ways of measuring temperature increase. In the practical part, a testing method was designed to measure the surface temperature of various types of light sources. The results were collated and subsequently evaluated.
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State and botanical composition of turfs on selected football playgrounds and possibilities of their improvement
BĚLÍK, Michal
The aim of my thesis was to assess the condition of the lawn at selected football pitches. At individual courses that were selected for analysis to determine the composition of the stands and was designed to measure the maintenance and improvement of grassland selected courses. The literature review includes knowledge about the history and significance of grassland. An important role is also played by the different grass species suitable for football lawns. It also includes the lawn care, which consists of proper irrigation, fertilization, mowing, etc. Finally, it plays a very significant role requirements on the football field and categorization system football pitches. The literature review will also find a brief characterization of individual pests, diseases and weeds in the lawn. To assess the pattern grass samples were taken for analysis grass species of three football pitches and a football club Spartak Pelhřimov, sports club Ústrašín and sports club Žirov. Subsequently, an analysis of individual lawns. Football clubs FK Spartak Pelhřimov and FC Žirov had the best mix of grassland. For the football field team FC Ústrašín was grassland at individual locations in worse condition, and therefore was recommended various measures, which consisted of a better fertilization, irrigation, sow empty seats etc.
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