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Effect of changes in training load on the motor performance of young distance runners
Bahenský, Petr ; Bunc, Václav (advisor) ; Kampmiller, Tomáš (referee) ; Kučera, Vladimír (referee)
Subject The performance in sport is created by the amount of talent and also by experienced training, but the relation between the training and the performance has a likelihood character. Generally, a long-distance talent is determined genetically from 70%. Reaching the top level is conditioned by both factors on top level. Therefore, it is very important to choose the right suitable training strategy at teenage runners, which can lead to optimal performance growth, concerning the individual age unusualness and talent. The higher performance was proved at specific training more than at nonspecific training. Meaning of nonspecific training is especially at young runners and beginners. The training effect becomes evident after some time, it has a latent effect. One of the most important factors of the final performance is also the economy of movement. Objectiv The aim of the thesis is to evaluate training changes in comparison to training load at teenage talented runners with the help of longitudal ex-post facto study. Methods The thesis deals with analysis of sports training at chosen athletes - runners at young age. It comes out of the need of long-term, systematic, perspective sports training, preferably corresponding with age. We deal with the influence of changes in volume and intensity during...
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The Study of Polyolefins Photochloration
Kučera, Vladimír ; Tocháček, Jiří (referee) ; Petrůj, Jaroslav (advisor)
This Master´s thesis deals with heterogeneous photochlorination of polyolefins and especially with the photochlorination of polypropylene itself. In the theoretical part the available information about properties, manufactory and application of chlorinated polyolefins, specifically polyethylene and polypropylene, is provided. The basic principles of the photochemistry are described, which are further applied to the issue of photochemistry chain reactions and photochemical halogenations, mainly photochlorinations. The practical part includes design and realization of few types of equipment for the heterogeneous photochlorination of polypropylene done at low temperatures (to 50° C) by gaseous chlorine in bulk or chlorine suspended in suspension of PP in CCl4. Series of chlorination was accomplished, which was varied in the type of PP, in the way of dosage Cl2 and in the period of high pressure mercury lamp irradiation (1–90 minutes). The chlorine content in prepared samples was determined by the gravimetry with ATR-FTIR spectroscopy, as well as by the Shöniger combustion method. Their accuracies were than compared. The chlorine content dependence on the period of chlorination and on the porosity of initial PP was established.
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Photopolymerization
Kučera, Vladimír ; Petrůj, Jaroslav (referee) ; Kučera, František (advisor)
The bachelor thesis deals with the photochemistry of macromolecular substances, especially with photopolymerization and photocrosslinking reactions. In the theoretical section there is at first a summary of the current knowledge from the area of the general photochemistry and principles of photochemical reactions which are also applied in photopolymerization. There are also both types of photopolymerization analysed – cationic and free-radical, photocrosslinking reactions and photopolymerization applications. In the experimental part, the testing of two fotopolymerization systems was performed. In both of them, styrene was used as a monomer. In one case benzoin was used as a photoinitiator, in the second one there was benzoin ethyl ether used. Furthermore, the photoinitiation ability of these two photoinitiators was compared at the base of conversion and molecular weight of products that were synthetized at different concentrations of photoinitiators and different time periods of irradiation of the mercury lamp.
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Optimization of processes in a distribution company
Švadlenková, Pavla ; Chlapek, Dušan (advisor) ; Kučera, Vladimír (referee)
The diploma thesis called Optimization of processes in a distribution company is focused on a firm, fictionally named ABC Ltd which, however, represents a real distribution company, a holding company to be precise, whose parent company is based in the Czech Republic and its subsidiaries are located in Italy, China and Australia. The overall number of staff of the whole concern is sixteen, so it falls into the category of small companies. The main purpose of this paper is to analyze the company's processes. The greatest benefit of the thesis is saving the company's expenses based on optimization of the company's processes. In the introduction to the paper all the goals and benefits are stated. The next chapter reveals a brief description of skills that are vital for working on the practical part of the paper and meeting all the goals that have been set at the beginning. The introduction to the practical part deals with introducing the company ABC Ltd. The main topic of this part is the analysis of the present state of the firm's enterprise architecture. One of these architectures, the process one, describes the company's processes which are divided into the main and the supporting ones. In the main processes the potential for improvements is identified. The conclusion brings evaluation of the limits which follow from the revealed potential and suggestions for supporting the limits in the form of project solution.
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Problém řízení H_2 pro deskriptorové systémy
Kučera, Vladimír
A solution of the H_2 control problem is presented for linear descriptor systems. The solution proceeds in two steps. Firstly, the set of all controllers that stabilize the control system is parametrized. The mathematical tool applied are doubly coprime, proper stable factorizations of rational matrices. The factors are expressed in terms of stabilizing descriptor feedback and output injection gains, which represent degrees of freedom that can be used in the subsequent optimization.
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