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Observation of phases of surface changes above exploited deposits of sedimentary type
Kajzar, Vlastimil ; Doležalová, Hana ; Staš, Lubomír ; Souček, Kamil ; Šimkovičová, Jarmila
Due to exploitation of coal and other raw materials of sedimentary type there happen many surface changes connected mostly with subsidence, shifts and deformations of the area of interest. Such processes happen mainly in the overlaying strata of exploited coalface. Size and directions of these movements and deformations depend generally on many factors, primarily on geo-mechanical properties of overlaying strata and general technique of exploitation of the deposit. One of the ways of surface observation of time spatial changes is the usage of modern methods for precise determination of changing position of geo-features. Among these methods we rank GPS surveying and usage of methods for gaining data from aerial photogrammetry. Subsequent processing, analysis and modelling of output data by means of modern GIS software offer an efficient source of information for subsequent work and decisions.
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Magnetism in transition metal oxides
Burianová, Simona ; Kalbáčová Vejpravová, Jana (advisor)
Title: Magnetism in transition metal oxides Author: Simona Burianová Department: Department of Condensed Matter Physics Supervisor: RNDr. Jana Poltierová Vejpravová, Ph.D. Supervisor's e-mail address: jana@mag.mff.cuni.cz Abstract: The CoFe2O4 nanocrystals are highly attractive due to their magnetic properties - large coercivity (up to 2 T at low temperatures) with moderate saturation magnetization (80 A.m2 .kg-1 ), remarkable chemical stability and mechanical hardness. Upon RE doping, a significant change of the properties is expected. This thesis is focused on investigation of Co1- xLaxFe2O4, x = 0.05 - 0.5 and CoLaxFe2-x O4 x = 0.05 - 0.2 nanoparticles prepared by sol-gel and microemulsion method, respectively, with varying particle size according to the final heat treatment. In the former case, the particles were embedded in amorphous SiO2 matrix, while in the latter case, the samples were matrix-free. The samples were characterized using X-ray diffraction and Mössbauer spectroscopy. Measurements of the temperature dependence of the ZFC-FC magnetization revealed that the blocking temperature is above the room temperature. The values of coercivity and saturation magnetization strongly depend on particles size determined by method of preparation. The higher coercivity values of about 2 T at 10 K show the...
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Taxonomic revision of the genera Anisus in the Czech Republic (Mollusca: Planorbidae)
Zavoral, Tomáš ; Juřičková, Lucie (advisor) ; Beran, Luboš (referee)
The aim of this work is to critically review the anatomical and morphological characters being currently used in the determination of Central European species of the genus Anisus and to confront them with molecular characters. For the molecular analysis mitochondrial genes for 16S rRNA and cytochrome c oxidase - subunit I (COI) were used. DNA analysis showed that known species occuring in the Czech Republic form well distinguishable genetic lines. Subsequent revisions of the anatomical characters of these lines have proven that these characters are due to their variability not suitable for determination, especially for the differentiating of the species A. spirorbis and A. leucostoma. The conchological characters have proven more suitable, especially the ratio of the size of the last and penultimate whorl. With the help of this character, we can safely determine a population within which there are transitional forms in other morphological and anatomical characters.
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Archaeo-geophysical survey of ditch enclosures in Kyjov I
Hašek, Vladimír ; Kovárník, J. ; Tomešek, J.
A site with two ditch enclosures by an aerial survey approximately 1000 - 1200 meters due south-west from the town Kyjov. The actual geophysical survey of the site focused on an area of some 180 x 150 m; a Canadian gradiometer OVERHAUSER GSM-19 (sensitivity 0,01 nT/m) continuous data acquisition. Our results showed that this structure includes two ditches of different sizes, filed with dark soil with higher magnetic susceptibility. Finds from this site include mostly fragment of pottery from Early Bronze Age. We also list a tool made of speckled silicate - the finds can be specified as the classical phase of Únětice culture.
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Possible effect of patogens on fttness of selected duck species
Langrová, Anna ; Votýpka, Jan (referee) ; Musil, Petr (advisor)
In total, 76 birds, mainly breeding females, were captured in years 2007-2009. Birds were inspected for the presence of avian influenza (AI) viruses and the AI antibodies. They were inspected as well for the presence of bacteria Borrelia burgdorferi s. l. and Anaplasma phagocytophilum and protozoan Leucocytozoon simondi in blood. The feces were examined for the oocysts and eggs of intestinal parasites. AI viruses were found in 4 cases, while over 80% of inspected birds had AI antibodies. Bacteria B. burgdorferi s. l. and A. phagocytophilum were found in 2 and 1 case respectively. Protozoan L. simondi was not found in any blood smear. The oocysts from protozoan genera Eimeria and Tyzzeria and eggs from roundworm genera Capillaria, Amidostomum and Echinuria were observed in feces. Statistical analyses were due to the small size of our data set inconclusive.
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Effect of manual lymph drainage on the healing of muscle
Krajsová, Barbora ; Hnátová, Iva (referee) ; Dudová, Agnieszka (advisor)
Title of work: Effect of manual lymph drainage on the healing of muscle Objective: The aim of this thesis is to assess the impact and effect of manual lymph drainage on wound rupture of the muscle. Method: Development and comparison of six case studies of patients diagnosed with muscle rupture. Three patients were treated with manual lymphatic drainage, the remaining three patients were treated with rest therapy. The effect of treatment was documented using diagnostic ultrasound. All patients were performed one frame muscle rupture after myocardial muscle injury and second inspection, after three weeks of the treatment. Size rupture were compared before and after treatment. Results: After comparing six case histories of patients diagnosed with muscle rupture was found that for the first group that was treated with manual lymphatic drainage has been reduced swelling, hematoma, and thus muscle rupture. Conclusion: The effect of manual lymph drainage in the group of probands was noticeable. However, such results shouldn't be generally applicable due to the small number of probands.
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Analysis and evaluation of impacts on the independence due to the districts of Prague into separate villages.
Čáp, Vilém ; Peková, Jitka (advisor) ; Matula, Miloš (referee)
The aim of this work is to analyze and evaluate the impacts on the economy in the eventual independence of a size different boroughs of the City of Prague into separate villages in the years 2001-2015. This topic is very timely considering the frequent discussions on financing municipal districts of Prague. Prague is also the economic center of the Czech Republic. Topicality is enhanced by the fact that the model of subsidy relations between Prague and its city districts often changes. In the theoretical part are listed and explained basic terms and definitions relating to the issue. This section deals mainly with the economic theories of the budgetary determining taxes, financing municipalities and boroughs in Prague. They did not omit the legislative requirements of the functioning of municipalities and boroughs of Prague. In the practical part is evaluated development funds that flowed into the budgets of different sized urban areas and that the budgets of such units in a given period of time passed, if those units were part of the capital Prague. Part of this work is part of a proposal for legislative changes that would empower any Prague districts only allow a referendum. Finally, the comparison of the current state and the independence of the aforementioned boroughs of the capital, and in terms of income of the urban areas and in terms of financing certain obligations boroughs based on current legislation.
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THE INVESTIGATION OF AN Al7075 ALLOY PREPARED BY SPARK PLASMA SINTERING OF MILLED POWDERS
Molnárová, O. ; Málek, P. ; Nemeth, G. ; Kozlík, J. ; Lukáč, František ; Chráska, Tomáš ; Cinert, Jakub
Atomized powder of an Al7075 alloy was high energy ball milled at room and cryogenic temperatures and compacted by spark plasma sintering (SPS) method. The influence of processing parameters on phase composition and microstructure was studied by X-ray diffraction, light and scanning electron microscopy. The mechanical properties were characterized by microhardness measurements. The atomized powder contained a large volume fraction of intermetallic phases located predominantly in continuous layers separating cells or dendrites in the interior of individual powder particles. Consolidation by SPS destroyed partially this morphology and replaced it by individual particles located at boundaries of original powder particles, at cell boundaries or arranged in chains in previous dendritic regions. High energy milling destroyed most intermetallic particles and enriched the matrix by solute atoms. The high deformation energy introduced into the powder during milling enhanced microhardness up to 220 HV. Consolidation of milled powders by SPS led to the formation of very fine-grained structure with the grain size even below 1 μm and with the fraction of high-angle boundaries about 0.9. Two main types of heterogeneously distributed precipitates were found. The irregularly shaped precipitates with a size about 1 μm seemed to encompass areas with rod like nano-precipitates in most samples. A drop in microhardness to 118HV was observed after SPS, predominantly due to a release of introduced deformation energy.
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Model for a Fluid-Particle Breakup in a Turbulent Flow.
Zedníková, Mária ; Vejražka, Jiří ; Stanovský, Petr
A model is developed for predicting the outcome of breakup of a fluid particle (bubble or drop), which is initially deformed (e.g. due to turbulence) and breaks into two daughter particles. An initially dumbbell-shaped deformation of the particle is assumed. The evolution of sizes of particle sub-parts is calculated using Rayleigh-Plesset equations, which consider the inertia of surrounding fluid, capillary action and viscous effects. The redistribution of internal fluid in the particle is calculated using Bernoulli equation. The model computes the sizes of daughter particles after the breakup. By assuming various initial conditions (various initial shapes and initial velocities of deformation), the size distribution of daughter particles is obtained. These size distributions are qualitatively compared with available experimental data and reasonable agreement is observed. Because of strong assumptions, this model cannot be used directly for accurate prediction of size distribution after a breakup. However, it provides an insight in the physics of the breakup, especially on the effect of inner phase properties.
Fulltext: content.csg -  PDF
Plný tet: SKMBT_C22017030713510 - PDF
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The appraisal of development of tax proportion of budgetary incomes of municipalities and regions in the Czech Republic
Poláková, Tereza ; Peková, Jitka (advisor) ; Krbová, Jana (referee)
The aim of this diploma thesis is a detailed analysis of tax incomes of municipalities and regions with focus on four particular municipalities and one region in a practical part. From the year 2001 to 2015 the share of tax incomes and their development are evaluated as a part of total incomes. The theme is highly topical due to ongoing discussions among lawmakers on the subject of budgetary allocation of taxes. The law determining the budgetary allocation of taxes is modified frequently, that is why knowing the impact of changes on particular municipalities or regions is helpful. This knowledge can be useful base for planning new adjustments of budgetary allocation of taxes. In the theoretical part there are mentioned expert opinions on financial management of municipalities and regions that arise from their functions and positions. The emphasis is put on incomes of municipalities and regions, especially on tax incomes. Particular changes from 2001 to 2015 in law regulating budgetary allocation of taxes are described here with their impacts on municipalities and regions. Incomes and management of selected municipalities representing various size categories and Liberec region are analysed in the practical part. Financial self-sufficiency is evaluated here. In general municipalities are more financial self-sufficient than regions. This thesis is further dealing with individual tax incomes and impacts of changes in budgetary allocation of taxes on their size. Making models of theoretical incomes is used to simulate effects of diverse law adjustments. Results of the analysis show that tax incomes of municipalities and regions are generally increasing. During the observed period there was tendency to lower the growth of tax incomes of large cities, to increase the growth of tax incomes of small municipalities and to straighten the level of tax incomes of medium municipalities thanks to changes in budgetary allocation of taxes. Tax incomes of regions were increased thanks to changes in budgetary allocation of taxes despite of partial decrease in particular segments of tax incomes after 2012.
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