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An effect of cold showers on mental characteristics of adults
BÜRGEROVÁ, Anna
The aim of this thesis is to use a questionnaire survey to perform the overall structure of the mental characteristics of a selected sample of the population and to reveal the effect of regular cold showers on the mental well-being of probands. To obtain data on the mental structure, a standardized SUPSO-7 questionnaire was used, which the probands filled in at the beginning and end of cold showering. 48 students of the Faculty of Education of the University of South Bohemia in České Budějovice took part in the research. The first experimental group took cold showers for 11 months, the second experimental group took them for 3 months. A control group was created for the second experimental group. Probands took cold showers on average four times a week. Results of data obtained using the SUPSO-7 questionnaire demonstrations in the experimental group influencing mental well-being and activity in comparison with control objectives. In contrast, in the experimental group, there was a decrease in impulsivity, depression, anxiety, and depression compared to control goals. Only the increase in mental well-being was statistically significant (p = 0.02), but the results show that cold showers could have a positive effect on the individual's mental characteristics.
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Hardening as a possibility to improve the function of the immune system
JANKOVSKÁ, Alena
This thesis is about hardening and its effect on the immune system. The theoretical part deals with the definition of the terms health, determinants of health, immune system and its functions, and last but not least the term hardening and its principles and forms. The practical part deals with hardening itself and its effects on the immune system in practice. For seven months, eight respondents aged 26 - 55 years were exposed to cold - either by bathing in cold water or showering with cold water. The result of the work is a subjective assessment of the impact of the respondents' hardening on their bodies and immune systems after the research period. The results show that all respondents reported a positive effect of hardening on their health. These were physical changes such as improved acclimatization to cold, less morbidity or significant improvement in atopic eczema or back pain. Changes were not only found physically, but also mentally, with respondents reporting greater resilience to stress, better mood and more energy. Seven out of eight
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The Effect of Hardening on the Human Body
Berounská, Natálie ; Vančata, Václav (advisor) ; Přívratský, Vladimír (referee)
The diploma thesis deals with the topic of hardening and its effect on the human organism. The goal is to fing out what and whether hardening has any effect on the human organism. The theoretical part describes the history of hardening, its various forms and the principles that we should follow during hardening if we want to experience its positive effect and avoid potential danger. It also includes the hardening of children which has its own specifics. Furthermore, the concept of thermoregulation and other concepts related to physiological processes that také place in the human body not only during and after staying in cold water are explained in the theoretical part. In the practical part, three groups of probands are compered with the help of a questionnaire: 100 sports hardeners, 90 hardeners and 95 non-hardeners. With the help of a quesionnaire, it is determined what and whether hardening has an effect on the human organism. After comparing all three groups, the results show that for the majority of respondents, hardening has a positive effect on both the physical and psychological aspects of a person. It was also conformed, for example, that sports hard people and hard people cope a little beter with disease form a cold (milder and shorter course). In the conclusion, all three groups of...
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A transcriptomic-based comparison of barley cultivars differing with respect to their low temperature acclimation capacity
Janská, Anna ; Ovesná, Jaroslava (advisor) ; Vaňková, Radomíra (referee) ; Honys, David (referee)
The PhD thesis is focused on a transcriptomics-based comparison of barley cultivars differing with respect to their low temperature acclimation capacity, with a particular focus on genes transcribed in the leaf and crown. The crown was of interest because of its importance for the winter survival of the plant. To involve both the first and the second phase of hardening, the test plants were exposed first to +3řC for 21 days, followed by - 3řC for one day. Freezing damage was assessed by measuring electrolyte leakage (Papers 2 and 3), using a modified version of a protocol developed by Prášil and Zámečník (1998). The same protocol was adapted to evaluate crown regrowth (Paper 2); for this purpose, the plants were cooled, then replanted and cut above the crown, and their survival rate calculated over the following week. Each RNA sample was queried by hybridization to an Affymetrix 22 K Barley1 GeneChip Genome Array (Close et al. 2004). The data were statistically analysed with the help of the software packages R, MAS 5.0 (Ihaka & Gentleman 1996) (Papers 2 and 3), Gene Spring GX 7.3 (Agilent Technologies, Santa Clara CA) and MapMan (Thimm et al. 2004; Usadel et al. 2005) (Paper 2), the "Self-Organizing Maps" algorithm (Kohonen et al. 1996) (Paper 3) and MIPS FunCat (Ruepp et al. 2004) (Paper 2). Paper...
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Heat treatment of aluminum castings
Mátl, Vojtěch ; Pernica, Vítězslav (referee) ; Kaňa, Václav (advisor)
This bachelor thesis deals with the topic of heat treatment of aluminium castings. The first part of this thesis comprises of casting alloys and casting technology summary, followed by description of aluminium heat treatment. The second part descibes an experimet, that examins the effect of conditions during aging upon final aluminium alloy properties.
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Heat treatment of formed parts
Leška, Radim ; Jopek, Miroslav (referee) ; Lidmila, Zdeněk (advisor)
In the research part, the bachelor thesis deals with forming, the mechanism of plastic deformation and steels used for forming. It also describes the principles of heat treatment, specifically the methods used in the preparation of semi-finished products, pressings, and forgings, i.e., annealing, hardening, and tempering. In the practical part, several experiments were performed on C45 steel. The first of them verified the effect of strain hardening after compaction, the others were focused on recrystallization, full annealing, hardening, and tempering. The effect of deformation and heat treatment was assessed in terms of hardness, which was measured by the Vickers hardness test.
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Machining of hardened parts
Havlík, Daniel ; Osička, Karel (referee) ; Polzer, Aleš (advisor)
This bachelor thesis is focused on the machining of hardened parts. The beginning of the work is devoted to the analysis of specific materials, 42CrMo4, 42CrMoS4 and 50CrMo4. Next described thing is heat treatment. The main part of this work consists of theoretical analysis turning of hardened parts and theoretical analysis of the thread whirling of ball screw, where the principle of ball screws is also described.
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Surface Treatment Technology of Metallic Materials and its Applications using Electron Beam
Matlák, Jiří ; Dupák, Libor (referee) ; Houdková, Šárka (referee) ; Foret, Rudolf (advisor)
Fast deflection is one of the great advantages of an electron beam, making it possible to process a relatively large area at once and also to modify the distribution of the supplied energy. The dissertation deals with surface heat treatment with a focus on the effect of beam deflection on the process. Furthermore, the influence of processing speed and defocusing of the electron beam is studied. The principles of electron beam technology and the summary of surface heat treatment of various materials are presented in the literary part of the thesis. The experimental part is focused on the influence of process parameters on processing in the solid phase, carried out on steel 42CrMo4, and in in the liquid phase, carried out on alloy NiCrBSi. Especially changes in structure, hardness, shape of the processed area and wear resistance are evaluated on processed samples. The results are also evaluated from an energy perspective. Furthermore, an optimum combination of technological parameters is recommended for solid and liquid phase surface heat treatment.
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An effect of cold showers on the psychological well-being
SCHWACHOVÁ, Nikola
Cold exposure activates the sympathetic nervous system and increases the concentration of beta-endorphin and noradrenaline in the blood, thus contributing to overall well-being. The aim of this thesis is to collect data of a selected sample of the population about their well-being and at the same time-frequency of hardening and find out the possible connection. 39 students from the Pedagogical Faculty of the University of South Bohemia participated in the study of hardening in the age range 19 - 25 years. The probands were divided into experimental and control groups. For about 3 months, 26 probands were hardened by cold showers. Data on the structure of the mental status of probands were obtained using the SUPOS questionnaire before and after the hardening period. Based on this analysis, it was found, that the experimental group showed a higher degree of well-being, with a simultaneous decline in impulsiveness, psychological unrest and anxiety expectations and fears, but statistically inconclusive. The positive influence of hardening of the organism on human well-being cannot be confirmed by the conclusion of this thesis.
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