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Novel thin scintillation films for 2D imaging screens
Hanuš, Martin ; Kučera, Miroslav (advisor) ; Mareš, Jiří A. (referee)
In this work we studied properties of Ce doped garnet scintillator layers (CexLu3-xAl5O12, CexY3-xAl5O12). They were prepared by liquid phase epitaxy. Studied materials show fast response, high quantum efficiency and good chemical and mechanical stability. Thus they are ideal for use in devices for 2D imaging. We measured absorption, excitation and emission spectra and kinetics of luminescence. Aim was to compare properties of grown layers with properties of single crystals grown by Czochralski method. We looked for the impact of melt compounds to measured layer properties. We also tried to determine optimal amount of Ce in layer. We used flux PbO - B2O3 and flux BaO - BaF2 - B2O3. In those fluxes we succeeded to grow garnet layers at temperatures as low as 1000řC. This lead to less intrinsic defects in crystalic lattice of layer in comparison to single crystals grown by Czochralski method (1900řC). Our layers were from 1 to 30 mm thick with higher concentration of Ce than singlecrystal. Due to higher concentration of impurities in layers grown from PbO - B2O3 flux we grown layers from BaO - BaF2 - B2O3 flux too. Flux BaO - BaF2 - B2O3 leaves less impurities in layers.
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Analysis of the imaging of the movement of the diaphragm using magnetic resonance in combination with spirometry investigation
Kolář, Pavel ; Kučera, Miroslav (advisor) ; Musil, Jaromír (referee) ; Herget, Jan (referee) ; Pafko, Pavel (referee)
The thesis evaluates respiratory and postural function of the diaphragm, studying how the two diaphragmatic functions are interrelated. Th e author of the thesis is interested in the postural function of the diaphragm because of its stabilization role on the spine. Th e diaphragm helps to regulate (increase) intraabdominal and intrathoracic pressure, thus bracing the spine while the external forces act on the spine. Disturbed postural activity of the diaphragm is considered to be one of the most frequent etiopathogenetic factors in vertebrogenic syndromes. In this research function of the diaphragm was analyzed during respiration and during postural function of the diaphragm, i.e. independently on respiration, by means of dynamic magnetic resonance (MR). Diaphragmatic dynamic magnetic resonance studies were synchronized with spirographic records. In the probands spirometric studies were also carried out, including force analysis of the respiratory muscles, as well as EMG diaphragmatic activity. 30 healthy individuals of mean age 29,3 years (ranging from 22,2 to 56,2 years) were involved in the study. Diaphragmatic activity was studied during primary breathing and in the course of upper and lower extremities' fl exion against resistance, under two circumstances, while breathing and while holding the breath....
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The KANBAN Optimalization of Inventory
Ševčíková, Jitka ; Kučera, Miroslav (referee) ; Jurová, Marie (advisor)
This thesis deals with implementation of another supplier to the Kanban system in the company Lexmark International s.r.o. The first part of the thesis is concerned with a theoretical finding from literature concerning inventory, types of supplies, level of inventory, calculation of supplies and, in addition, the Kanban and JIT system. The operative part is dedicated to analyses of the current status of the company using of the Porter´s, SWOT and SLEPTE analyses and, more over, the process of supplies by the method of PUSH and PULL – Kanban system in the company. The following chapter compiles the project on optimalization and decreasing of inventory by implementation of the Kanban system by Asian suppliers whose inventory coveres a substantial part of the company´s value. The objective of this thesis is to find whether the implementation of Kanban reduces level of inventory and whether their costs can be reduced in comparison with the last years and last but not least whether the implementation can be useful.
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Analysis of multistress ageing on dielectric spectras of materials
Kučera, Miroslav ; Frk, Martin (referee) ; Rozsívalová, Zdenka (advisor)
Diploma thesis treat of effect of thermal, electrical and combined (thermal electrical) stress on electrical characteristics of insulation material ISONOM NMN which is used as a slot insulation in electric motors. To monitor the stress is used the method of dielectric relaxation spectroscopy. Under examinations are the resultant dielectric spectra which constitute the frequency dependencies of components of complex permitivity. Compared are the effects of particular stresses on dielectric spectra of surveyed insulative material.
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Modern energy and decreasing the energy intensiveness of buildings
Kučera, Miroslav ; Popelka, Josef (referee) ; Havlík, Roman (advisor)
This diploma thesis deals with possible energy-savings in the municipal buildings of Spytihněv. Moreover, it discusses the possible improvements of heating features and making use of renewable resources. This is meant to be achieved by a wrapper which is less demanding on energy consumption than those which have been used until now. Attention is also paid to a more efficient system of energy distribution. Both energetic and financial points of view are taken into consideration. The thesis consists of a few parts. Introduction, the first part, deals with renewable resources issues on a theoretical level. The second part is divided according to each individual analysed premise/building. At this point energy-saving proposal, choice of a heating system, a heating pump, a solar collector as well as energy-saving and financial calculation are included.
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