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Noise, Transport and Structural Properties of High Energy Radiation Detectors Based on CdTe
Šik, Ondřej ; Lazar, Josef (referee) ; Navrátil, Vladislav (referee) ; Grmela, Lubomír (advisor)
Poptávka ze strany vesmírného výzkumu, zdravotnictví a bezpečnostního průmyslu způsobila v posledních letech zvýšený zájem o vývoj materiálů pro detekci a zobrazování vysokoenergetického záření. CdTe a jeho slitina CdZnTe. jsou polovodiče umožnují detekci záření o energiích v rozsahu 10 keV až 500 keV. Šířka zakázaného pásma u CdTe / CdZnTe je 1.46 -1.6 eV, což umožňuje produkci krystalů o vysoké rezistivitě (10^10-10^11 cm), která je dostačující pro použití CdTe / CdZnTe při pokojové teplotě. V mé práci byly zkoumány detektory CdTe/CdZnTe v různých stádiích jejich poruchovosti. Byly použity velmi kvalitní spektroskopické detektory, materiál s nižší rezistivitou a výraznou polarizací, detektory s asymetrií elektrických parametrů kontaktů a teplotně degenerované vzorky. Z výsledků analýzy nízkofrekvenčního šumu je patrný obecný závěr, že zvýšená koncentrace defektů způsobí změnu povahy původně monotónního spektra typu 1/f na spektrum s výrazným vlivem generačně-rekombinačních procesů. Další výrazná vlastnost degenerovaných detektorů a detektorů nižší kvality je nárůst spektrální hustoty šumu typu 1/f se vzrůstajícím napájecím napětí se směrnicí výrazně vyšší než 2. Strukturální a chemické analýzy poukázaly, že teplotní generace detektorů způsobuje difuzi kovu použitého při kontaktování a stopových prvků hlouběji do objemu krystalu. Část mé práce je věnována modifikaci povrchu svazkem argonových iontů a jejímu vlivu na chemické složení a morfologii povrchu.
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Exposure of children to atmospheric aerosol in school gyms
Šafránek, Jiří ; Braniš, Martin (advisor) ; Holcátová, Ivana (referee) ; Heller, Jan (referee)
Research into indoor environment has shown that schools are buildings with high- levels of particulate matter concentrations. This is especially the case of schools situated in high-density traffic or in industrial areas. Several studies have also proven the impact of PM on the teenage generation's health. So far no detailed study has been performed to cover the environment of school gyms where the PM dynamics are different from other indoor microenvironments. This different dynamics relates to the gym environment heterogeneity and to the human activities taking place in it. Due to higher pulmonary ventilation, the exposure of the exercising pupils can reach levels possibly noxious to their health. Size resolved mass concentrations of aerosol were measured in three elementary Schools in Prague. One school was situated in the city centre with high traffic density. The second school was situated on a plateau on the periphery with a medium level traffic. The third school can be found in Prague south-western suburbia, in an open landscape, with low traffic density. PM concentrations were measured simultaneously in naturally ventilated gyms and outdoors ajacent to the particular school building. Two pairs of monitors were used throughout the study: A DustTrak Aerosol Monitor and a Personal Cascade...
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The Changes of agricultural Landscape of Microregion Sedlčany in the years 1850-1943
Mašková Janotová, Šárka ; Jakubec, Ivan (advisor) ; Štemberk, Jan (referee)
The thesis is focused on the economic situation development in the Sedlčany region from the first half of the 19th century till second half of the 20th century. The period observes changes from the agrarian landscape. At the end of period of the Second Czechoslovak Republic the landscape could be described as agrarian-industrial landscape. Traditionally, the Sedlčany region is considered industrially influenced. The presented thesis deals with confirmation or disproof of this idea. The research tries to find the potential focuses of dynamic economic development. If the focuses existed in the past, the research deals with comparison economic development of the Sedlčany region with other parts of Bohemia and finds the circumstances of the development. The economic situation of this area is located into wider context of the industrialization in the Czech countries during given period. Of course, the phenomenon of industrialization process relates to many factors, such as demographic development, transportation, trade, banking, agriculture and administrative activities. The federation actions are followed up in the region. The main aim of the associations is economic development of this region. They emphasize mainly upward movement of the peasant status. Keywords Sedlčany, economic history,...
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Exchange Differences in Accountancy in an Enterprise
ŠPILAUEROVÁ, Hana
In connection with economy globalisation, international cooperation of companies and expansion of international trade, the issue of exchange rates, transfer of currencies and exchange differences concerns companies more and more. The aim of this thesis was to show in theory as well as in practice how a company transfers assets and liabilities expressed in a foreign currency into Czech crowns by means of exchange rates. In the theoretical part, methods are described how to realise this transfer and abide by legal regulations concerning this issue. Next, accounting operations are given where it comes to creation of exchange differences. Data for the practical part were provided by the enterprise ESSA Ltd. On these data, the influence of exchange differences on the company's economic results in the years 2009-2015 is shown. The method of accounting exchange differences is presented on individual cases of accounts receivable and accounts payable. For orientation in the issue, model examples of other accounting cases are given where exchange differences may arise.
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How to prevent the proliferation of Legionella pneumophylis in hot water in the hospital Czech Krumlov
TUREK, Jan
This diploma thesis deals with microbiological quality of hot water in a hospital in Cesky Krumlov as well as hot water piping condition with respect to Legionella. It also deals with arrangements for improving the quality of hot water in this hospital. The subject and target of this thesis are the findings of the mentioned parameters based on own observations, technical documentation and analysis of warm water performed by an accredited laboratory. The hospital in Cesky Krumlov, the construction of which began in 1909, was built in 1911 as the 'Nemocnice Císaře Františka Josefa I.' As the time went by, new buildings were built up. The hospital was renamed to 'Všeobecná veřejná nemocnice' in 1942. In the following years the hospital expanded until the current condition. Water quality and presence of Legionella is a world-wide issue, which we must fight against. The thesis is divided into two parts. First, theoretical part, which includes both general and specific knowledge about Legionella, its health risks, the environment in which it occurs, possibilities of eliminating, suitability of the material for hot water pipes, gained in professional literature and a part of the Czech legislation dealing with public health protection, the law 'No. 258/2004 Coll.' in actual version and quality of drinking water and hot water. In the second, empirical part, I focus on the situation of the hospital in Cesky Krumlov from 2009 till 2015, concerning newly built boiler room and the whole distribution system of hot water regarding Legionella. Particularly I focused on materials used for ecologisation of the gas boiler room and materials used for hot water pipes and actual state of water distribution in individual buildings of this health care facility. I mentioned the analysis of the water samples performed by an accredited laboratory with corresponding technical documentation, which concerns the water distribution system, provided by the medical facility. I used secondary data analysis to evaluate these documents. Regarding the results from 2009 to 2015 the microbiological quality of warm water doesn't meet the limits defined in the Attachment No. 3 of the above mentioned law Order 252/2004 Coll. Limit value for colony forming units of Legionella is set to maximum of 100 CFU. In most of the samples this limit was exceeded by series of units up to hundred thousands of units. The last results in 2015 prove improvement of the unfavorable situation. In that year the analysis was tested three times. First in February, where the CFU units were 'only' in hundreds, with the top value of 550 CFU in the Postacute Care ward. Second analysis was performed in June that same year. Results were acceptable. The highest value was 64 CFU. Last analysis in the hospital was performed in December. Increased concentration of Legionella was again in the Surgery building. There were established of 1400 colony forming units. There were 300 CFU in the Postacute Care ward and the limit value of 100 CFU was in the ward of Internal medicine. The answers to research questions 'How to prevent reproduction of Legionella peumophylis in the water distribution system of the hospital in Cesky Krumlov?' and 'How to ensure a sufficient amount of quality hot water in the medical facility?' are included at the end of the stated recommendations. A risk factor causing the fast reproduction of Legionella is the old water distribution system in most of the buildings and low water temperature of water leaving the boiler, which is 55°C. All mentioned results and evaluations are included in this thesis as well as attached pictures, which show the environment and situation within the Health Care Institutions.
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The influence of different way of grassland management on botanical composition and biomass production of grass stand
ŠOBROVÁ, Martina
This thesis summarizes the results obtained from a study of long-term field trials with permanent grassland, which based on Faculty of Agriculture, University of South Bohemia in the České Budějovice between years 2010 - 2013. Permanent grasslands are managed in different ways (mowing, mulching, fallow) and the intensity of exploitation (harvested 1 - 3 times a year, fertilization). The work was focused on the evaluation of changes in growth composition, biomass production and dry matter content of hay variants. Also were evaluated biodiversityand grazing value of the crop stand. Before each harvest (mowing or mulching) was evaluated growth composition of experimental grasslands on an area of 20 m2. Plant species coverage of individual agro botanical groups was estimated by the reduced projective dominance (% D). Harvested biomass of grassland was considered and sample mown every variantof the experiment was dried (dry matter content). Species diversity was expressed as the number of species and species diversity was expressed in the form of Simpson's index. It was also calculated value describing the quality and productivity ofthe crop stand.
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Evaluation of FGMRI provenance plot with European beech (Fagus sylvatica L.) on the locality Jíloviště, Baně (Central Bohemia)
Kuklová, Alena ; Podrázský, Vilém (advisor)
Buk lesní (Fagus sylvatica L.) je nejvýznamnější listnatou dřevinou České republiky. V minulých letech se jeho zastoupení velmi snížilo v důsledku nešetrné těžby, přírodních disturbancí a následně hlavně změnou lesního hospodaření, kdy se upřednostňovaly především jehličnaté dřeviny smrk ztepilý (Picea abies) a borovice lesní (Pinus sylvestris). Provenienční výzkum se, díky jejich preferování při pěstování, nejprve věnoval hlavně jehličnatým dřevinám, až v pozdější době se zaměřuje i na dřeviny listnaté. V současné době se naše lesní hospodářství k buku znovu vrací a jeho zastoupení se v našich lesích pomalu opět zvyšuje.
Úkolem diplomové práce je provedení terénního šetření na provenienční výzkumné ploše VÚLHM Strnady č. 82 Jíloviště, Baně ve věku 34 let (zjištění počtu rostoucích jedinců, tloušťkového a výškového růstu, tvárnosti kmene, větvení, úhlu větví, tloušťky větví), zjištěná a naměřená data statisticky zpracovat a vyhodnotit rozdíly mezi testovanými proveniencemi buku lesního.
V první části práce je zpracována literární rešerše, zaměřena na provenienční výzkum buku lesního, v další části jsou statisticky zpracovány kvantitativní a kvalitativní znaky zjišťované na výzkumné ploše. V poslední části jsou vyhodnocená data porovnávána s daty z minulých let.
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Fish population on the river Dyje at NP Podyjí
Štrunc, David ; Kalous, Lukáš (advisor) ; Kuříková, Pavlína (referee)
This thesis is focused on changes of fish populations in the river Dyje located at the national park Podyjí. These changes are caused mostly due to presence of two large dams (Znojemská and Vranovská dam) between which w the study locality is situated. There are also other factors affecting ichtyofauna composition as piscivorous predators, non-native species or restocking of particular target species. First information about the fish populations appeared in year 1921. In that years, the locality contained species, that are not present at the river site at the moment. Examples given: sturgeon (Acipenser ruthenus) and danube salmon (Hucho hucho). These species extincions were associated with interupted fish migration between locality and Donau river basin. On the other hand, new fish pecies (that are not-native to Czech Republic and were not observed before 1921) started to appear during following years. From the former fish population of type Barbus-Chondrostoma the type changed to Salmo-Thymallus. Most of this change was caused by regular restocking of the salmonids. Since 1993 there is evidence on new presence of tolerant fish species that do not necesarilly need cold, flowing water. There is high probability, that this appearance is caused by slowing down the river stream and also the heating of the water, that takes place in the dam.
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Gastrointestinal nematodes in wild ruminants from Czech Republic
Heinclová, Pavla ; Langrová, Iva (advisor) ; Vynikalová, Lucie (referee)
This study is focused on the occurrence of gastrointestinal nematodes in cervids in the Czech Republic. The aim of the study was to determine the species composition of gastrointestinal nematodes of roe deer (Capreolus capreolus) and fallow deer (Dama dama) . Research on presence of parasites in the digestive tract of roe deer and falow deer was done by using autopsy which was performed in the laboratory of the Department of Zoology and Fisheries FAPPZ CULS Prague according to K. I. Skrjabin.
Autopsy material was extracted from small intestine of the captured pieces during the years 2009 - 2014. Research was done on 15 deer coming from Central Bohemia, Ústí and Liberec region. For determination were used microscope and determination key. Among determination characteristics determined in females include overall length of the body width, shape and size of the vulva, the presence of flaps, vulva distance from the anus, the shape of the end of the body. Males observed features: overall length, size and shape of spicules, gubernaculum.
Among the common features observed included the formation of the pharynx and oral capsule. Each of the nematode was measured and incorporated into species and genera. Result shows nematodes: Trichostrongylus capricola, Nematodirus fillicolis venulosum and Oesophagostomum, Cooperia pectinata and subsequently evaluated prevalence.
From the results of the autopsy of the small intestine shows that the highest prevalence rate among deer and fallow deer reaches Trichostrongylus capricola (60 %) and Nematodirus filicollis (20 %). The lowest prevalence consistently achieve Oesophagostomum venulosum and Cooperia pectinata (6.7 %). The prevalence was consistent with studies carried out in other European countries. In comparison with studies in the Czech Republic with Trichostrongylus capricola was compared to another research from 2008 to decrease prevalence.
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The use of unmanned aerial vehicles in agriculture.
Starý, Karel ; Kroulík, Milan (advisor) ; Petrásek, Stanislav (referee)
Unmanned aerial vehicles has been a fast developing field over the last couple of years Farmers have been trying to take profit from this development and are interested in various options of applications. Demands on the area of agricultural production have been increasing, especially higher effectivity and the economical aspect of production are in focus. Farmers seek for the information about crop statuses and cattle in pursuit of economical rentability and enviromental sustainability. Due to this awareness farmers can take measures to reach economical profit. In the form of literature review the thesis describes construction types, their power options and the suitability for particular application is evaluated. Furthermore, scanning varieties and particular examples of applications are mentioned.
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