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The Influence of Fines on Pore System of Concrete
Elfmarková, Veronika ; Smolka, Hynek (referee) ; Hela, Rudolf (advisor)
Literature does not provide a satisfactory answer to maximum and minimum particle size or the particle size of the mortar phase especially for optimal porosity of concrete. To overcome the shortcomings of the design methods were thought to design a new method for design of concrete mix. This idea is based on a complex analysis of powder materials (determination of granular properties, shape factor of fillers, porosity, packing of powder materials, surface area, etc.) and subsequently to assess the influence to pore system of concrete and physical and mechanical properties in hardened state of concrete. In this work are presented and analyzed two types of fillers – fly ash and limestone dust.
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The Influence of Fines on Pore System of Concrete
Elfmarková, Veronika ; Smolka, Hynek (referee) ; Hela, Rudolf (advisor)
Literature does not provide a satisfactory answer to maximum and minimum particle size or the particle size of the mortar phase especially for optimal porosity of concrete. To overcome the shortcomings of the design methods were thought to design a new method for design of concrete mix. This idea is based on a complex analysis of powder materials (determination of granular properties, shape factor of fillers, porosity, packing of powder materials, surface area, etc.) and subsequently to assess the influence to pore system of concrete and physical and mechanical properties in hardened state of concrete. In this work are presented and analyzed two types of fillers – fly ash and limestone dust.
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Food safety
Vrabcová, Kateřina ; Filipová, Alena (advisor) ; Zeman, Jiří (referee)
In the diploma thesis I was dealing with the issue of food safety in the Czech Republic and labeling of meat products. In the practical part were carried out two surveys, public opinion poll and survey of proper labeling of meat products. Opinion polls were attended by 462 consumers and analysis of proper labelling was subjected to 489 meat products in select retail chains in Prague. Survey results of labeling of meat products were not very positive, but can be expected to improve, as well as enhancing food safety.
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Are drivers of luxurious cars more likely to commit driving offences ?
Klouček, Oldřich ; Rod, Aleš (advisor) ; Babin, Jan (referee)
The aim of this thesis is to verify whether drivers of luxurious cars are more likely to violate road traffic regulations. Theoretical background of this analysis consists of standard consumer theory using utility maximization and cost-benefit analysis which provide analysis of illegal behavior. This thesis summarizes the most important parts of economics of luxury and economics of crime and then uses this summary to create assumptions and models. Empirical part is based on city traffic analysis and driving offences that could be committed in order to avoid waiting in traffic jam. Data collected by terrain observations are used to verify that with increasing purchasing costs of a car also increases probability of committing a driving offence. By using assumption, that luxurious cars can be considered as cars with high purchase costs, was proved, that drivers of these cars are more likely to commit such a driving offence. It was also proved that time spent in traffic jam is one main of the factors that influence decision whether or not commit a driving offence.
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The comparison of productivity of employees in case of using of intrinsic and extrinsic motivation
Pecinová, Kateřina ; Houdek, Petr (advisor) ; Chytilová, Helena (referee)
The thesis is an empirical analysis of the effects of intrinsic, extrinsic and negative motivation on the productivity of operators of erotic lines. In a natural experiment, I influenced the structure and size of incentives of 16 employees, in order to determine the optimal management of human resources in the company TOPIC PRESS. The data were evaluated using a regression model with inclusion of identification strategy diff'in'diff. The results show that the performance of intrinsic and extrinsic motivation significantly reduced the number of SMS messages that operators take per hour of 16.6 % and 16.3 % respectively. On the contrary, negative motivation significantly increased the number of SMS/hour by 18 %, but I suppose only a short-term effectiveness. Influence of motivation on the average number of minutes per hour was not confirmed.
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Working conditions of drivers in the international transport
Fronk, Tomáš ; Novák, Radek (advisor) ; Šmíd, Milan (referee)
The main aim of the thesis is a comlex description and explanation of legislative concernig the working conditions of drivers in branch of international transport. It provides the reader general overview of the whole field including function of the digital tachograph system and current development of EU legislative. In the practical part, there are described some actual problems, which occur in this area - it's especially the question of road controls and fines. The opinions of drivers concernig this matter are included as well.
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