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Numerical analysis of selected silicate based composites shrinkage
Drbušková, Magdaléna ; Vlk, Zbyněk (referee) ; Keršner, Zbyněk (advisor)
The thesis is divided into two main parts. In the first theoretical part is described the problems of shrinking including a comparison of Czech standard and Model Code 2010, Vol. 1. The second practical part of the master`s thesis is focused on the numerical analysis shrinkage primarily on the initial stage of this process. The experimentally obtained data are set approximations of the relative deformation using ShrCeC. Subsequently the numerical simulation of shrinkage of selected silicate specimens using a computer applications SpatiDist and FyDiK 2D. The real test specimens are modelled as two-component composite consisting of cement paste and aggregates. The result is a parametric study takes into account the influence of type and size of grain aggregate.
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Geodetic Deformation Measurement of Wide-Span Timber Roof Structures
Karas, Jindřich ; Švábenský, Otakar (referee) ; Bureš, Jiří (advisor)
The aim of this thesis is deformation measurement of wide-span timber roof structures of swimming pool in Brno - Kohoutovice. The thesis deals with measuring of other stage, processing of surveying data, evaluation of deformation and graphic interpretation. Results of measurements follows up two stages in years 2009 and 2010. The part of the thesis is calibration measurement of surveying instruments and used measuring accessories.
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Processes of planning investments and depreciation/ amortization in financial plan
Plašil, Radek ; Hlaváč, Jiří (advisor) ; Stoklasa, Jan (referee)
The final paper Processes of planning investments and depreciation/ amortization in financial plan will be focused on seeking to describe the most important processes, stages and relations in planning of investments. The investments will dominate because of the fact that the depreciation and amortization are determined by real investment decisions. According to this, depreciation and amortization only illustrate the investment decision which has been already made by the company before. The main target is to compare the differences and relations between financial planning for the purposes of the company and the business valuation. At the beginning are defined two different points of view which are called the macroeconomic and microeconomic view. After that separated financial plans will be mentioned from the view of their users depending on their requirements. The main part will not be based only on the investments in companies, different stages and related tasks but also on the financial view and coordination between all the processes which is very important to succeed. The last part will be written in a co-operation with producing company. It should sum the theoretical part up and emphasize it on the real project.
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Plasma-discharge control in fluidics
Tesař, Václav ; Šonský, Jiří
A transducer controlling fluid flow by electric signals without the two-stage conversion involving moved or deformed components have been so far unrealisable. Authors solved the problem by means of “ionic wind” of non-temperature plasma discharge acting inside a fluidic diverter amplifier. Experiments demonstrated good performance at high frequenciesf > 100 Hz and small Reynolds numbers Re <1000.
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Correlation of cytokine gene polymorphisms and bronchoalveolar lavage fluid gene expression profiles in patients with interstitial lung diseases
Slimáčková, Eva ; Vašáková, Martina (advisor) ; Vencovský, Jiří (referee)
Idiopathic pulmonay fibrosis (IPF), extrinsic alergic alveolitis (EAA) and sarcoidosis are interstitial lung diseases (ILD) of distinct pathogenesis. While IPF represents primarily fibrosing lung disorder of unknown etiology with dominant Th2 cytokine milieu, sarcoidosis is a systemic disease presenting with noncaseating granulomas and Th1 cytokine pattern. EAA develops after repeated exposure to inhalation antigens, and can present either with a granulomatous formation or progressive pulmonary fibrosis according to the stage of the disease and relationship between antigen exposure and immune system status. Th1/Th2 imbalance is dominant feature of these ILDs and we suppose that the susceptibility to them could be genetically encoded in cytokine gene polymorphisms. Cytokine gene polymorphisms could influence cytokine protein expression, which might lead to imbalance of Th1/Th2 immune reactions. Enhanced Th2 type cytokine production might induce the alternative activation of alveolar macrophages (AM), with consequent stimulation of colagen production by fibroblasts. the way from gene to protein leads through messenger RNA (mRNA) expression. Results of the pilot studies suggest that expression profiling could help to identify pathways relevant to pathogenesis of these disorders. The aim of our study was to...
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The application of biotests on Japanese medaka (Oryzias latipes) eggs for the screening assessment of cyanobacterial water blooms toxicity
SIKORA, Jiří
This thesis has two parts. In the first part there is described an optimal methodological process for screening tests used in subsequently. Fertilized fish eggs of Oryzias latipes were incubated in 6 tests with different numbers (from 1 to 6) with standard conditions in ISO water. In the tests, hatching performance and duration of embryonic development were investigated and the results were applied on screening tests. The other part of the thesis is aimed on the proof of potential toxic effects of water with cyanobacterial water bloom. The fertilized eggs of Oryzias latipes were embedded into the test in stage 6 to 8. Three samples of cyanobacterial biomass from free waterbodies with known species composition and microcystin {--} LR, YR and RR contents were tested. The hatching performance, duration of embryonic development, lethal and sublethal effects were monitored during the tests. The tests were performed according to the OECD 212. There were detected significant differences in hatching performance, duration of embryonic development and in some cases also in induction of deformities between the control group and the tested groups.
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Biomechanics of Whiplash Injury and its Influence on Cervical Spine Structures
Vaňková, Jana ; Otáhal, Stanislav (advisor) ; Dudová, Agnieszka (referee)
Title Biomechanics of whiplash injury and its influence on cervical spine structures Objectives: Objective of the work is charting of studies examining mechanism and course whiplash event, its influence on osseous and arthral textures, intervertebral discus, ligaments, neural textures, cerebro-spinal fluid and vertebral artery. In summary form mention possibilities of prevention in terms ofconstruction car. Method: Diploma work is processed in the form of commented literary background research. Results: Confrontation of individua! works brought definite results, respecting kinematics cervical spine at rear impact. Most ofin vivo and in vitro studies confirmed clear two-phase answer. Immediately after stroke (50 - 110 msec) cervical spine is forming S-form deformation with flection UCS and extension LCS, whereas it is extension with abnormal JAR. Whole spine is loaded by compression at this time. The second period is C-form deformation with extension whole cervical spine. Risk of structures injury is the highest in S- stage. The most often it is localized in LCS, and it is in intervertebral joints including capsular ligaments, intervertebral discus and anterior longitudinale ligament. There are threatened also neural textures, both influence oftension force applied to UCS, and pressurized gradient...
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Identification of fatigue damage Al alloy treated with SLM technology using acoustic emission method
Zemanová, Lucie ; Mazůrek, Ivan (referee) ; Mazal, Pavel (advisor)
The aim of the diploma thesis is to study fatigue properties of EN AW-2618A aluminium alloy produced by selective laser melting (SLM). S-N diagrams of reference alloy and SLM material depending on manufacturing conditions were constructed. Reference alloy had the same chemical composition as the SLM material, but it was made by traditional technology (by extruding). While testing, acoustic emission (AE) and resonant frequency of loading was monitored. Fractographic analyses of fracture surfaces were performed. It was found, that SLM material has significantly worse fatigue performance. Fatigue properties are strongly dependent on SLM process parameters settings and precise observance of procedure. The most significant differences in cyclic degradation were found in the length of the stages of fatigue. The more homogeneous the material is, the longer the nucleation stage compared to the total lifetime is. The main source of AE in case of the reference material is plastic deformation on the tip of the crack. For SLM testing, stronger acoustic activity was recorded, because brittle fracture of the material between discontinuities, which is stronger AE source, is more frequent.
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Growth and individual variability of the water scorpion Nepa cinerea (Heteroptera: Nepomorpha: Nepidae)
VILIMOVSKÁ, Lenka
It this study morphometric characteristics and the growth of univoltine predatory water scorpion - Nepa cinerea were studied on the basis of data measured on freshly killed individuals, the same ethanol - fixed individuals and dried individuals. The growth of this species has an exponential character. By comparing the morphometric characteristics of freshly killed and fixed individuals was found that the ethanol fixation influenced mainly weight of all developmental stages and total abdominal ventral length of adults. The same was found for the comparison of morphometric characteristics of freshly killed individuals and dried individuals. Other studied dimensions were not significantly deformed even by fixation or drying. Reducing of individula demensions by the influence of fixation and drying was uneven at different developmental stages. Reliable dimension for differentiating of individual developmental stages fixed material and the collected dried material is especially the media length of the body. Dimensions of fixed individuals and dried individuals is not significantly different from dimensions of freshly killed individuals. This project was supported by grant GA CR P505/10/0096.
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