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Assesment of air concentration in water depending on pressure
Uttendorfský, Petr ; Himr, Daniel (referee) ; Pochylý, František (advisor)
This bachelor thesis deals with air concentration in the water. The general conception comes from Henry's law about gas dissolved in the liquids depending on pressure. The basic derivation, the values which influence dissolvability and the Henry's Law constant´s forms are discussed here. Next part is about the usage aeration in the industry and in the construction of aeration systems. The special equipment is for realization experiment. This special equipment is gas´s accumulator based. The measured values are expressed as the tables and the graphs. The data from experiment validated the force of Henry´s Law: with growing pressure above water level, the air concentration in the water is growing too.
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Assessment of the effect of origin and the fraction of coarse aggregate for flexibility and durability of structural concrete
Hanuš, Petr ; Žalud, Oldřich (referee) ; Vymazal, Tomáš (advisor)
The bachelor thesis deals with influence of origin and fraction of rough aggregate on the durability and elasticity of structural concrete. As a criterion of durability, the frost resistance of concrete is monitored. In the theoretical part describes the types of aggregates, which are used in structural concretes. In addition, test methods are described to determine the elasticity and durability of concrete according to the test standards valid in the czech republic. In the experimental part of the thesis, seven concretes of the same consistency and strength were designed and mixed, which differed using different types of coarse aggregate. A change in elasticity during freezing cycles was observed
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Dependence of the value of the construction enterprise on the size of the equity
Bahenský, Miloš ; Kocmanová, Alena (referee) ; Špirková,, Daniela (referee) ; Korytárová, Jana (advisor)
The doctoral thesis deals with the valuer issues of business valuation with construction production in the condition of the Czech economy. The business valuation issue is, and will always be, highly relevant in a market economy environment, with regard to both methodical and practical approaches. The main aim of the doctoral thesis is to demonstrate the dependence constructing empirical regression model to determine the value of the construction enterprise by the chosen income valuation method based on the equity (book value of equity in historical costs). The first part of the doctoral thesis is a research study describing the approach of the authors to the current state of knowledge concerning the issues of business valuation, aspects of equity, using the principles of system methodology. Based on these findings, a space is defined in which it is possible to propose a solution of a partial problem in terms of selecting the enterprise value category and the associated income valuation methods suitable for extensive time-series analysis. An integral part of the doctoral thesis is the determination of the sample size of construction enterprises according to the assumptions and limitations of the chosen methodology. Empirical research for data collection is based on Justice.cz database. Another important part is, in the spirit of system approach principles, the choice and application of the method of system discipline for the solved problem of doctoral thesis. The result of the solution is an empirical regression model, which after subsequent validation in multiple case studies could also be recommended for wider verification in valuers practice. Part of the thesis will also include discussions in the wider context of the potential benefits of the doctoral thesis for practical, theoretical and pedagogical use.
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Measurement of calibration inductance parameters
Martišek, Jiří ; Fialka, Jiří (referee) ; Šedivá, Soňa (advisor)
This thesis deals with the problem of measuring the properties of coils and their inductance dependence on frequency under the influence of an external magnetic field. The theoretical analysis of the properties, parameters and behaviour of the coils is included. Furthermore, the theoretical part describes the measurement methods and instruments for measuring coils and their parameters. The third chapter is devoted to the Caliber program from Meatest, s.r.o., which can be used to automate both calibration and measurement. The practical part describes the selection of the coil measurement method, the selection of the tested commercial coils and the creation of the procedure in the Caliber program. The rest of the thesis describes the measurement procedure, processing of the measured values and evaluation of the measured results.
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German energy policy towards Russia after the annexation of Crimea
Etrych Goldscheidová, Jana ; Nigrin, Tomáš (advisor) ; Handl, Vladimír (referee)
This work deals with reasons why Germany have not seen, or rather have not wanted to see, Russia as a dictatorial regime, with which Germany have been building dependent energy relations for decades threatening Germany's energy security. The aim of the work is to reveal motives of democratic Germany leading to energy dependence on an authoritarian country. The work analyzes German-Russian relations, which had been started during the Cold War as part of Brandt's Ostpolitik and strengthened regardless of political parties and wars provoked by Russians in Chechnya, Georgia and Ukraine, as well as by extorting of customer countries when disagreement with Russian international policy. The first chapter looks at Germany from a perspective of an international actor, because unhealthy relationships lead to the limitation of democratic decision-making in domestic and foreign policy, which was evidenced by Germany's reserved attitude to the war in Ukraine 2022. The next chapter explores the length and depth of German-Russian relations. Under heavy lobbying, Schröder pushed for close ties between German and Russian energy industries for a purpose of the economic prosperity of Germany and himself. Although after the annexation of Crimea in 2014, Germany's rhetoric towards Russia was harsh and Germany declared...
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Knowledge among adolescents at a select high school about the effects of alcohol on the human body and their experience with alcohol use.
Jordánová, Denisa ; Váchová, Alena (advisor) ; Kovaříková, Miroslava (referee)
This diploma thesis concerns the most used drug, alcohol. The theoretical part consists of chapters concerning alcohol characteristics, pharmacology effects of alcohol consumption on the human body, and alcohol consumption by youths. Moreover, the thesis defines addiction and focuses on drug issues and their prevention. This diploma thesis mainly aims to reveal the knowledge of alcohol effects and consequent risks of high school students in all years based on the number of correct answers. The minor aims are to find the comprehension of given students in alcohol law, the first experience with alcoholic beverages, the frequency of alcohol consumption in the previous 30 days, and the way of alcoholic beverages providing. The aims have been assessed based on a questionnaire focused on alcohol knowledge and alcohol consumption. According to the questionnaire findings, the students appear to have a decent knowledge of alcohol's effect on the human body and the consequent risks of alcohol consumption. Also, most of them have already had an experience with alcohol. Furthermore, the practical part incorporates an interactive lecture proposal focusing on alcohol and its consequence on the human body. The lecture aims at students in high school's first and second years. KEYWORDS alcohol, dependence,...
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Immunohistochemical analysis of the expression of selected signaling molecules in rat brain: the effect of morphine withdrawal
Přítulová, Eliška ; Novotný, Jiří (advisor) ; Mrózková, Petra (referee)
Morphine is one of the most commonly used analgesics for pain, but its clinical use may be accompanied by the development of tolerance and dependence. Abuse of morphine can then lead to the development of severe withdrawal symptoms. Given the knowledge gathered so far, morphine addiction research often examines the impact on areas of the brain involved in the reward system. The main goal of this work was to investigate the effect of long-term administration of morphine and morphine withdrawal on certain signaling molecules that are related to the molecular action of opioids in selected areas of the rat brain. We focused on the cAMP response element-binding protein (CREB) and its active phosphorylated form (pCREB), as well as on G-protein signaling regulator RGS4. Our results indicated that morphine administration may cause a decrease in CREB expression in the basolateral amygdala in morphine-affected rats. We also found a reduction in CREB phosphorylation in the CA1 region of the hippocampus, possibly due to morphine withdrawal for three months. In this study, we did not observe any statistically significant changes in RGS4 expression in the prefrontal cortex and hippocampus due to morphine administration and subsequent morphine withdrawal. Key words: morphine, dependence, withdrawal, rat brain,...
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