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Study of catalytic decomposition of silica
Štubian, Martin ; Kolíbal, Miroslav (referee) ; Bábor, Petr (advisor)
This thesis deals with catalytic decomposition of silica using electron microscopy and Auger spectroscopy. The thesis is primarily focused on the Au-Si phase, which is created during in the reaction. In the theoretical part, the principle of used methods is described and recherche on the catalytic decomposition of silica is presented. The practical part contains the results of the measurements and their interpretation.
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Implementation of matrix decomposition and pseudoinversion on FPGA
Röszler, Pavel ; Rajmic, Pavel (referee) ; Smékal, David (advisor)
The purpose of this thesis is to implement algorithms of matrix eigendecomposition and pseudoinverse computation on a Field Programmable Gate Array (FPGA) platform. Firstly, there are described matrix decomposition methods that are broadly used in mentioned algorithms. Next section is focused on the basic theory and methods of computation eigenvalues and eigenvectors as well as matrix pseudoinverse. Several examples of implementation using Matlab are attached. The Vivado High-Level Synthesis tools and libraries were used for final implementation. After the brief introduction into the FPGA fundamentals the thesis continues with a description of implemented blocks. The results of each variant were compared in terms of timing and FPGA utilization. The selected block has been validated on the development board and its arithmetic precision was analyzed.
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Utility of modern methods of assessing the financial situation of an enterprise (EVA, MVA and average cost of capital)
KOŘÁNKOVÁ, Romana
This thesis deals with evaluation of the utility of modern methods of evaluation of the financial situation of the company and their comparison with older, classic indicators. The theoretical part deals with the financial analysis of the company and the classical indicators and with the modern indicator Economic value added. This paper describes the concept of the EVA indicator and the transformation of the accounting data leading to the economic data and the items entering the calculation of the EVA are defined in detail. The practical part contains calculations of classical indicators based on the accounting data of company Kern-Liebers in years 2012-2016. The main part of this thesis deals with transformation of accounting data of the company for subsequent calculation of the EVA indicator. In addition, the EVA indicator is decomposed, the company is compared with sectoral values by using the INFA system and in the last step the results of the classical indicators with the modern EVA indicator are compared and the conclusions are interpreted.
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Differences in Oxidation Mechanism of Selected Bioflavonoids, UV-Vis and IR Spectroelectrochemical Study
Sokolová, Romana ; Fiedler, Jan ; Ramešová, Šárka ; Kocábová, Jana ; Degano, I. ; Quinto, A. ; Křen, Vladimír
The oxidation of selected bioflavonoids (quercetin, rhamnazin, fisetin, rhamnetin, taxifolin, luteolin, silybin and 2,3-dehydrosilybin) was studied by electrochemical and spectroscopic methods. The oxidation mechanism and formation of oxidation products depends on the chemical structure. Only small differences in the chemical structure of compounds with flavone, flavanone and flavonol motif result in extremely variable oxidation pathways and products. Products of oxidation and further decomposition were determined by HPLC-ESIMS/MS and HPLC-DAD.
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Infant mortality in the Czech Republic and Europe: trends and patterns
Magenheimová, Kateřina ; Rychtaříková, Jitka (advisor) ; Šídlo, Luděk (referee)
Infant mortality in the Czech Republic and Europe: trends and patterns Abstract This Master's thesis addresses the development of infant mortality in the Czech Republic between the years 1950 and 2016 using more detailed indicators of infant mortality. To evaluate the impact of infant mortality rate, on the lengthening life expectancy at birth in the Czech Republic and selected European countries, a decomposition of life tables is included. Selected European countries are then compared with the use of cluster analysis, based on infant mortality indicators and life expectancy at birth by sex. Finally, an analysis is made on the basis of infant life tables which are calculated by sex, birth weight and legitimacy for the Czech Republic. Keywords: infant mortality, Czech Republic, European countries, tables of infant mortality, sex, child-legitimacy, birth weight, decomposition, cluster analysis
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Mineralization of nutrients during the process of spruce dead wood decomposition in the mountain forest
Višňová, Anna ; Hofmeister, Jan (advisor) ; Choma, Michal (referee)
Summary: This thesis is focused on collecting information on the importance of dead wood on biogeochemical cycles of chemical elements in the mountain forest ecosystems of central Europe. The goal of this thesis was to determine the concentration of various elements(C, N, P, Ca, Mg, K, Na, Mn, Al, Fe) in the coarse woody debris of spruce samples of different age, stage of decomposition which were collected in different localities in the national park Šumava. Another goal was to determine the speed of which these elements are released from the dead wood. The information on the quantity of different elements and the speed of their release is currently lacking and could lead to better understanding of various biogeochemical cycles of elements in the mountain forest. During the decomposition the concentration of the elements N, P, Al and Fe increased whereas the Kalium concentration decreased. The other elements' (C, N, Ca, Mg, Mn) concentrations varied. Carbon constituted approximately 50% of weight in all of the samples analyzed. We carried out a laboratory experiment based on decomposition of dead wood samples in various stage of decay during a period of six months. The released concentration of CO2 was measured at two to four weeks intervals. The release of CO2 continually decreased during the experiment.....
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Importance of fungal decomposition of wood in the ecosystems of natural forests
Štercová, Lucie ; Baldrian, Petr (advisor) ; Kolařík, Miroslav (referee)
The decomposition of organic substrates represents an important part of the global carbon cycle and affects its global change through CO2 release. In temperate forests, deadwood represents a large carbon stock, its amount and decomposition is crucial for ecosystem biodiversity and functioning. The fungi are omnipresent powerful decayers in all terrestrial ecosystems. Their ability to decompose all deadwood compounds, mainly lignocellulose, is highly important. Without fungi, the wood decompositions and the release of withheld nutrients back to nutrient cycles couldn't be performed. While many studies were concerned with the estimation of decomposition rates of deadwood, still deeper knowledge about microbial decomposition processes and the diversity of saproxylic species and their interaction is needed. The fungi are still underrepresented in dead wood studies. This study had two main objectives. First was to describe the fungal community on downed deadwood of Fagus sylvatica and Abies alba in natural forest of Salajka in the Czech Republic, to reflect the substrate changes during the different decay stages, and to link the enzyme activities to fungal community composition and their described ecophysiologies. Second aim was to describe the fungal communities on standing and downed dead logs of...
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The importance of mycorrhizal fungi in the root decomposition.
Haiclová, Klára ; Kohout, Petr (advisor) ; Kolaříková, Zuzana (referee)
Mycorrhizal fungi are known as symbionts of many plant species. Fungi provide better access to mineral nutrients and water for host plants, and in return fungi receive carbohydrates from plants. Although a significant proportion of organic matter is bound in the root biomass, little is known about the factors affecting root decomposition. Understanding the process of root decomposition and the factors that affect it, is important to us. Knowledge of root decomposition helps us understand the carbon cycle and answer questions about carbon sequestration in soil. This Bachelor's thesis is focused on the importance and function of mycorrhizal fungi during root decomposition. It describes the influence of mycorrhizal fungi on the decomposition of fine roots colonized by mycorrhizae, the ability of mycorrhizal fungi to decompose organic matter and influence the decomposition rate through competition with saprotrophic organisms. Keywords: mycorrhizal fungi, roots, decomposition, rate, organic matter, soil, importance, carbon sequestration
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Mortality of females from selected malignant neoplasms in the context of preventive programs in the Czech and Slovak Republic since 1994
Antošová, Marie ; Hulíková Tesárková, Klára (advisor) ; Fialová, Ludmila (referee)
Mortality of females from selected malignant neoplasms in the context of preventive programs in the Czech and Slovak Republic since 1994 Abstract The main aim of the thesis is to compare the differences in mortality due to female malignant neoplasms (neoplasm of the breast, cervix and colon) in the Czech Republic and Slovak Republic during 1994-2015. Changes in mortality levels have been associated with the implementation of relevant preventive programs. The development of mortality is analyzed according to age only for female population and causes of death using the standardized mortality rate of selected causes of death and age specific mortality rate and using the decomposition of life expectancy at birth between the years 1994-2001 and 2009-2015 in terms of age groups and causes of death. Results of the analytical part of the thesis show that mortality decreased during 1994-2015 but the differences among mortality in both selected countries occurred. Mortality in both the analyzed countries differed above all for malignant neoplasm of the breast. Higher efficiency of established preventive programs has been demonstrated in the Czech Republic than in the Slovak Republic. Keywords: Czech Republic, Slovak Republic, mortality by causes of death, females, prevention programs, malignant neoplasms, decomposition
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Male mortality excess by causes of death in selected European countries in 2000-2013 period
Knížová, Karolína ; Hulíková Tesárková, Klára (advisor) ; Fialová, Ludmila (referee)
Male mortality excess by causes of death in selected European countries in 2000-2013 period Abstract The aim of this thesis is to analyse and to evaluate current differences in mortality between males and females in selected European countries by causes of death. The thesis tries to capture the main features of so-called male mortality excess, and also tries to find its specifics in each individual state. Selected countries (the Czech Republic, Sweden, France and Spain) represent individual European macro-regions. The analyzed causes of death (neoplasms, diseases of nervous system, diseases of circulatory system, diseases of respiratory system and external causes) were selected based on the highest difference in the proportion of standardized mortality rates in total mortality between males and females. In the analytical part of the thesis, the methods of standardization, mortality tables and Pollard's two-dimensional decomposition of the difference in life expectancy at birth between males and females are used. To illustrate the situation of male mortality excess on the different groups of causes of death, contour plots of contributions to the difference in life expectancy at birth between males and females were created. The most significant differences in life expectancy between males and females were...
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