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Influence of a weak electron correlation on electron properties of disordered condensed systems
Šopík, Břetislav ; Janiš, Václav (advisor) ; Drchal, Václav (referee)
Mean-field theory for disordered systems of correlated electrons is constructed, where correlations caused by Hubbard's interaction are included in the Hartree aproximation. This theory is then used to describe influence of electron correlations on density of states and also to describe impact of disorder on a phase diagram of ferromagnetic order. Further the theory is used to obtain a two-particle vertex. Influence of a strength of electron correlations on analycity and behaviour of the two-particle vertex is studied.
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Výskyt kvasinek v silážích a jejich význam
Vaculíková, Barbora
The aim of the study was to assess the effect of yeast in silage and verify the fact that the additives will ensure inhibition of undesirable microorganisms. The literature review focused on the metabolism of yeast, their importance in silages limitations and possibilities. Model experiments were performed with peas with barley silage and with corn silage. The influence of additives on the final quality of the silage and their influence on the content of microorganisms, together with the quality of the fermentation process, was assessed. According to the provided measurements it can be argued that the use of additives was only partly due to the limitations of yeast and aerobic stability. Chemical preservatives based on organic acids favorably slowed the onset of secondary fermentation in peas with barley silage, even though there was no suppression of the number of yeast on this option. The negative correlation of yeast dry matter content was confirmed for the corn silage (r= 0.6219). In the silage with a chemical preservative (2,402 +- 0,775 log CFU/g) positive effect (P<0,05) on the limitation of yeast compared was detected to the control silage. Based on measurements of pH the degree of contamination of yeast cannot be evaluated. It was confirmed that even the best additive cannot guarantee quality and stable silage, if the principles of silage are not adhered to.
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Correlation of morphologic and moleculargenetic features of selected tumors
Šíma, Radek ; Skálová, Alena (advisor) ; Boudová, Ludmila (referee) ; Ehrmann, Jiří (referee)
We present a series of 16 salivary gland tumors with histomorphological and immunohistochemical features reminiscent of secretory carcinoma of the breast. This is a hitherto undescribed and distinctive salivary gland neoplasm, with features resembling both salivary acinic cell carcinoma and low grade cystadenocarcinoma, as well as displaying strong similarities to breast secretory carcinoma. Microscopically, the tumors have a lobulated growth pattern and are composed of microcystic and glandular spaces with abundant eosinophilic homogenous or bubbly secretory material positive for PAS, mucicarmine, MUC1, MUC4 and mammaglobin. The neoplasms also show strong vimentin, S-100 protein, and STAT5a positivity. For this tumor we propose a designation mammary analogue secretory carcinoma of salivary glands (MASC). The 16 patients comprised 9 men and 7 women, with a mean age of 46 years (range 21-75). Thirteen cases occurred in the parotid gland, and one each in the minor salivary glands of the buccal mucosa, upper lip, and palate. The mean size of the tumors was 2.1 cm (range 0.7 to 5.5 cm). The duration of symptoms was recorded in 11 cases and ranged from 2 months to 30 years. Clinical follow-up was available in 13 cases, and ranged...
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Vybrané fyzikální parametry jako indikátory kvality půdy
Kratochvílová, Lucie
In bachelor thesis "Selected physical parameters as indicators of soil quality" we aimed at soil physical properties in Luvi-HaplicChernozem (locality Praha-Ruzyně) and Haplic Cambisol (localities Vatín and Svárov). We followed texture, density, bulk density, porosity, micro and macro aggregates composition, and stability of aggregates. Also content and quality of soil humic substances was determined. Obtained results showed that there is a linear correlation between clay particles content and humic substances content and humification degree. Reversed correlation was found between clay particles content and aggregates stability and structure coefficient.
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Phase-correlation based image registration
Druckmüllerová, Hana ; Martišek, Dalibor (referee) ; Procházková, Jana (advisor)
Tato práce se zabývá použitím fázové korelace k určení vzájemné rotace, změny měřítka a posunu mezi digitálními obrazy. Fázová korelace je založena na Fourierově transformaci, proto je popsána Fourierova transformace funkcí definovaných na R^2 i diskrétní Fourierova transformace funkcí definovaných na konečném počtu bodů {0, 1, ... , N-1}^2, kde N je přirozené číslo. Dále je pozornost věnována modifikacím fázové korelace, díky nimž metoda umožňuje nalezení parametrů podobnostní transformace i mezi obrazy, které mají vysoký dynamický rozsah a slabě patrné struktury, obsahují aditivní nebo impulzní šum a jsou pořízeny pomocí různých snímačů a optických soustav. Obsahem práce jsou i modifikace metody pro snímky sluneční koróny pořízené během úplných zatmění Slunce, což patří mezi nejobtížnější úlohy registrace obrazů.
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Vliv odrůd ječmene na úroveň technologických znaků
Podsedková, Eva
Abstrakt I'm introducing the presentation which evaluates the effect of species, location and annuality to the basic technological characteristics of malting barley ( crude protein content in grain of barley, wort extract content , relative extract at 45 ° C , diastatic power , final attenuation , friabilitity , the content of beta - glucans in wort and wort viscosity ) . The kind of species affected more than 50 % and more of the friability and beta-glucans ,and more than 40 % relative diastatic power of the extract at 45 ° C and the attainable degree of fermentation. Extract in the wort was affected by species only from 22%. The location affected mostly a crude protein content (26 %). The content of the extract in the wort was significantly influenced by annuality (42 %). The known relationships between the relative extract at 45 ° C and Kolbach's number, friability and content of beta - glucan in wort , crude protein extract and wort, were confirmed again . Also, very strong correlations were found between characters showing the cytolytic and proteolytic modification.
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Quality of Higher Education in Selected EU Countries
Vobruba, Lukáš ; Doucek, Petr (advisor) ; Maryška, Miloš (referee)
The aim of this thesis is to approach a meaning of quality in higher education. The education is perceived as a system where several kinds of investment are transformed into outcomes with an added value. Determining a methodology based on a correlation analysis enables the author to look for links in education systems of selected members of the European Union. These links are interpreted in order to point out the qualitative implications of potential decisions in terms of managing this system both at a central and institutional level. Approaches to quality of tertiary education are presented in order to define the means of quality assessment and selecting a policy of achieving it. The functioning principles of higher education institutions describe the institutions' structure and characteristics. These are complemented with the impact of the European Union initiatives. The properties of higher education are analysed using selected indicators which are assumed to have an influence on education quality. The reasons for their choice are explained and an enouncement of hypotheses is followed by the correlation. The analysis outputs are interpreted and contextualised in accordance to their usability for the stakeholders.
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Trend výnosů pšenice seté v kontextu vývoje klimatu
Macalíková, Markéta
Climate change is characterized by higher average temperatures, more frequent extreme weather events such as torrential rains, floods, frost and snow cover absence, absence of snow cover and longer episodes of drought. In the 21st century is likely to shift production areas where surface area of corn and sugar beet will be increased. In corn production areas will be achieved lower yields than in sugar beet in 2020. Around 2030, the most suitable conditions for growing wheat sown in sugar beet and potato production area. The last part was determined from the data of the Central Control and Testing Institute for Agriculture of the Czech Hydrometeorological Institute and the relationship between the moisture regime selected sites in different stages of the growing season and yield lines. Statistically significant correlations between yield and available water holding capacity (AWHC) was observed at stations Uherský Ostroh, Pusté Jakartice, Lípa and Věrovany.
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Studium klimatických změn v České republice
Osičková, Renata
In my Diploma Thesis are processed and analyzed values of average monthly temperatures recorded in 34 meteorological stations that are uniformly distributed in the territory of the Czech Republic. Recorded data are approximated by a series regression function F(t, x, y, h), which is based on a model . This function describe the dependence of temperature T [°C] on time t [year], geographical position x, y [km] and altitude h [m]. Unknown coefficients of the linear functions were calculated using a Maple application based on the method of least squares. The author calculated coefficients of linear correlation for each meteorological station and also the time development of the coefficient of linear correlation for the whole territory of the Czech Republic. The calculated average values for individual stations and for the whole territory were 0.97 and 0.92, respectively. This result indicates a very high standard of the developed model and the model itself indicates that the average temperatures are decreasing in approximately 80 % of the territory of the Czech Republic.
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