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Hemodynamic parameters of the cervical carotid bed of saline in the throes of stenosis of the carotid bulb and the bed capacity of treated recanalization excercise
Gregová, Daniela ; Kalvach, Pavel (advisor) ; Zvěřina, Eduard (referee) ; Beneš, Vladimír (referee) ; Bauer, Jiří (referee)
With the increasing number of patients suffering from some metabolic diseases leading to the development of atherosclerosis there is an urgent need for early diagnosis of the scale. If we think about disability sclerotic cerebral arteries, the optimal method of investigation is duplex ultrasonography, which is relatively inexpensive and friendly for the patient. To assess not only the structure and extent of atherosclerotic plaque, but also to assess the extent of any narrowing of the arteries and to evaluate the hemodynamic impact of structural changes present. It is an ideal candidate for screening in primary or secondary prevention of stroke, as well as for regular checks dispensarized patients. Knowledge of normal hemodynamic conditions in the cervical carotid stream is necessary in the assessment of various pathological conditions. This paper seeks to offer the most comprehensive view on the issue of carotid stenoses ultrasonografisty eyes. For practical reasons we focus on localized stenosis in the carotid bulb, the number is high above the stenosis in other locations.
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Changes in volume of water reservoir Fojtka due to sediment flux
Vlasák, Tomáš ; Moudrý, Vítězslav (advisor) ; Hradilek, Václav (referee)
Sedimentation in dams is a natural process depending on various factors over a period of time. Sediments influence both total capacity of dam's surface and also relief of bottom.
This thesis deals with amount of sediment in Fojtka dam and with change of its bottom's relief in past 109 years since its establishment. There was conducted measuring using an echosounder in a boat. Final output derived from this experiment was a point layer including 5500 point items. Subsequently there was executed a measurement of dam's shoreline using GPS device. Data were processed in ArcGIS software, then reduced and edited to be used for interpolation tools of ArcToolbox. In order to select the most accurate interpolation method, there were created validation data, which were compared with interpolated data. The best results have been achieved by interpolation method Kriging and TIN in resolution 0.5 m.
Original maps were vectorized for comparison with current condition. Created validation data were compared in order to show accuracy of particular interpolation. The most useful evaluated method for gained data was TIN method in resolution 0.5 m. TIN method was applied in both data sets for 2D and 3D bottom relief visualization and also for calculation of actual water volume and area of water surface of the dam.
Difference in bottom's relief of Fojtka dam showed capacity reduction about 6,7 % and reduction of water surface area about 3,2 %. Regular extracting of sediment in reservoir located above the dam causes this relatively small silting ratio.
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Influence of terminal groups of oligobutadiene on dielectric spectra
Vilhelm, Ondřej ; Rozsívalová, Zdenka (referee) ; Frk, Martin (advisor)
The bachelor works discourses about atributes of KRASOL LB oligobutadiens by Sartomer industries and KRASOL LB’s final groups. The research proceed by dielectric sweep spectroscopy using electrode technology Agilent 16452A that is used for gauge of transtition capacity and dissipation factor, by which we are able to enumerate both relative permittivity [‘] and figure of loss [“]. Every gauge depends on frequency and temperature.
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Synergic effects of multistress ageing of electroinsulating materials
Novák, Lukáš ; Frk, Martin (referee) ; Rozsívalová, Zdenka (advisor)
Submitted work deals with monitoring impact of thermal and electric ageing on the dielectric properties of insulating material NKN 0887. In the course of the experiment five sets of dielectric insulating materials were aged. The voltage range has been set from 1,5 kV till 2,2 kV and temperatures were 23 °C and 200 °C. The capacity and loss factor has been directly measured by RLC meter Agilent with attached electrode system. The electrode system operates on the principle of a plate capacitor. The values of relative permittivity and loss number has been calculated from values of capacity and loss factor. For easier confrontation has been frequency dependences of these values plotted in a chart. The Cole-Cole diagrams has been created and factors of Havriliak-Negami function has been calculated. Data has been compared with each other and the effect of ageing factors has been deduced.
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Measurement uncertainty in diagnostics of insulating materials
Kamenická, Zuzana ; Rozsívalová, Zdenka (referee) ; Frk, Martin (advisor)
This work deals with measurement capacity and dissipation factor of capacitor with real dielectric in frequency range 20 Hz to 30 MHz. Liquid and solid dielectrics are measured by LCR instruments and by test fixtures, both from company Agilent. Relative permittivity and loss number are calculated for different instruments settings. The general aim is to specify the influence of parameters as frequency, voltage, integration time and thickness of material on the uncertainties of primary and secondary quantities for measurement.
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Protection of water supply focused on terrorist attack by selective contaminants in the district of Žatec
HRUŠKOVÁ, Hana
In my bachelor thesis, I concentrated primarily to issues inclusive to water management and terrorism. The main aim of my thesis is to analyze protection of water supply against possible terrorist attack with using of selective contaminants. The district of Žatec is defined by administrative area municipality with extended competence Žatec that includes 18 villages and their parts. Over 91 % from the 26 thousand inhabitants are supplied a potable water by public water supply from several surface and groundwater water sources. In this region has been built over 20 water tanks, more than 200 km water mains, several pump stations, water treatment plant and another equipment. Water supply network of the district Žatec is controlled by regional dispatch center, located in Most. In partial analyse of security system water supply, I focused on issue of the protection against external disruption by terrorists on selective objects or equipment. I visited some of them, specifically selected water tanks and dispatching by excursion with expert consultation. I founded that the most vulnerable components are water tanks which are not connected to dispatching. That´s means that dispatchers haven´t continuous information about monitored parameters of water tanks and that these water tanks are not secured by infrared sensor which points out a break-in. These water tanks aren´t connected to large distributional systems. They supply individual town or group of municipalities by local or group water mains. Their further disadvantage is small capacity too. Water tank at Třeskonice has two chamber each with capacity of 25 m3. I defined suitable contaminant of water supply system by analysis potentially hazardous water contaminants. I compared required properties of suitable contaminant with available informations concerning to selective biological weapons and toxins. Although, at first I supposed that I will define by analysis more suitable contaminants than one, so I could determine only bacillus anthracis as potentially highly hazardous water contaminant due to limited access of available informations about agens. Spores of this bacterium which cause anthrax are e.g. resistant to chlorine, stable in water enviroment, relatively easy cultivation on selected culture medium. There is probably posibility to be infected by cutaneous and intestinal forms of anthrax through effective and sufficient contamination. In the final analysis, the potential of a terrorist attack on the water supply network of the district Žatec, I concentrated mainly on evaluation posibilities of ways performance terrorist attack from the point of view of efectivity and difficulty performance such terrorist attack and on evaluation of total and general potencial terrorist attack. The easiest and the most likely ways of performance terrorist attack is direct aplication of suitable contaminant into water tanks´s reservoir. Simultaneously the easiest and the most effective is contamination into selective water tanks that I specified in analysis security of water supply network. Nevertheless is undoubted that even ineffective contamination would mean really significant intervention towards activities of all relevant institutions and serious disruption of inhabitants´s daily life. Due to my achieved results is neccesary to raise level of protection water supply network for some parts of this system. It concerns primarily improvement security for individual water tanks. It is also desirable to determine security level of water tanks by legislative law. For verification of preparedness for such crisis situation is needed to perform a demonstration training with model situation for possible contamination of the water network by hazardous substances.Concurrently it is important to implement available and actual data from adequate foreing sources which are concerning to a research potentional water contaminants, especially biological and chemical weapons.
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Incineration plant of middle treatment capacity – flue gas cleaning system
Krejčí, Tomáš ; Kropáč, Jiří (referee) ; Bébar, Ladislav (advisor)
Analysis of the regional energy supply, shows that suitable alternative may be a combination of primary energy sources with the municipal solid waste to energy plant. Starting from the fact that the regional thermal energy needs are characterized by smaller power demand, but relatively significant seasonal fluctuations in heat supply. These factors limit the processing performance of the considered waste to energy plant that could be included in the system of regional energy supply. The aim of the thesis was to propose adequate treatment capacity for regional waste to energy plant and explore alternative solutions in off-gas cleaning for exhaust gases generated during incineration of MSW. The balance sheets of two alternative solutions off gas cleaning are part of the thesis, both in terms of material and energy consumption. Presented evaluation of economic demands alternative arrangement of off gas cleaning includes operating costs and the impact on earnings from energy production.
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Analyse of services of Tourism in Podblanicko
SVITÁKOVÁ, Jana
Tourism region Podblanicko is an interesting place and it can offer many attractivities of tourism for the visitors. It was investigated on the basis of an analysis of this region. It was made an analysis of Tourism services (accommodation-, catering- and transport services) in this region. Some visitors of this region were questioned (250 respondents). There is a good quality and capacity of accommodations, but the most of tourists use acommodation by their relatives or by friends. They don{\crq}t prefer hotels or pensions. Many of visitors don{\crq}t use any accommodations service {--} they are spending only one day in the region. It{\crq}s necessary to present this region completely with all tourism targets. It can bring more money for a progress of the destination Podblanicko.
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