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Tuner for UHF Receiver with Low Power Consuption
Kaštánek, Martin ; Vágner, Petr (referee) ; Urbanec, Tomáš (advisor)
The purpose of this work was to make a proposal for input parts of receiver for band 430 to 440 MHz. A model of chosen semiconductor triode BFP540 was created in simulation software. Possibilities how to decrease consumption of this semiconductor triode, keeping the profit, were investigated through the simulation.In compromise consumption, keeping the profit of the amplifier - an optimal operating point for this semiconductor triode UCE = 1,2 V and IC = 2 mA was found. It was tested through the testing wiring with noise microstrips conformity. Ascertained knowledge was used for construction of tuner for UHF receiver. An operating point of input amplifier of UHF receiver was owing to power supply amplifier forced for bigger effectiveness to UCE = 2,65 V and IC = 2,0 mA. Suppression of mirror frequency is provided with Helix filter of the third order, because of intermediate frequency 10,7 MHz. Mixing on intermediate frequency is made again by semiconductor triode BFP540. Selectivity of receiver is provided with intermediate frequency crystal filter 10,7 MHz with bandwidth 15 kHz. Designed input part enables reception of SSB, FM and digital types of modulation.Bandwidth intermediate frequency exit is adapted to this request To receive particular modulation , it is necessary to complete intermediate frequency signal way with appropriate intermediate frequency filter.
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Dynamics of flight and control
Šabartová, Zuzana ; Tomášek, Petr (referee) ; Nechvátal, Luděk (advisor)
This bachelor thesis deals with an analysis of the equations of motion for aircrafts. The equations could be linearized by assuming the steady state flight with small perturbations so that we can use the theory of control. The result of the thesis besides a theoretic aspect is a simulation of motion response due to change of control terms position in MATLAB & Simulink for two particular airplanes.
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Viral hepatitis E
ANDĚLOVÁ, Šárka
The thesis contains basic information regarding Viral hepatitis E, particularly the causative agents, human and animal strains, the clinical picture and occurrence in the Czech Republic as well as abroad. The practical part is focused on analysis of trends of occurrence of the viral hepatitis E in the Czech Republic from the very earliest, up until the present time. The research further looks at morbidity in the different regions of the Czech Republic, which is compared to the morbidity in Plzen region. The practical part further focuses on the specific source, route of transmission and possible preventive measures against viral hepatitis E. In this work, both quantitative and qualitative types of research were used. In quantitative research, secondary analysis of data was used from various sources like EPIDAT. In the qualitative research, semi standardised interviews with doc. MUDr. Petr Pazdiora CSc, and with MVDR. Vaclav Polacek. Based on the interviews, an educational material in form of a leaflet was created. From the year 1996 to the year 2012, a total of 894 cases of HEV where recorded. In 1996, there was only one case of Viral hepatitis E which was recorded. From 1997 to 2005, the occurrence was sporadic and negligible. From 2006, there was a linear increase in viral hepatitis E. The incidence significantly increased in the year 2009 and 2011. In the Czech Republic, Viral Hepatitis E has an upward trend of occurrence. Viral hepatitis E cannot be prevented by active immunization, possibility of a vaccine is still being investigated. Basic preventive measures include maintaining principles of hygiene like avoiding drinking water from unknown sources, food should be prepared using drinking water and fruit should be properly washed and then peeled before consumption. It is important to find out about the occurrence of viral hepatitis E, before travelling to any foreign country. During meat processing, it is important to avoid cross contamination between clean and unclean operations. Before consuming foods like black pudding, sausages, steaks and pies, it is important to ensure that this food is properly cooked using adequate heat and for a period of time. From the research, it can be concluded that, there is need to devote adequate attention to viral hepatitis E. It may seem that the incidence in the Czech Republic is not serious, but it is important to focus on public awareness of this disease, especially the preventive measures so as to stop it from spreading.
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Economic and social impacts of transfer of Germans during the years 1945-1947 in Jesenicko
Kriegischová, Lenka ; Stellner, František (advisor) ; Szobi, Pavel (referee)
The bachelor thesis is focusing on one of the most important moments in the history of Jesenicko, which took place during the years 1945 - 1947, when, within the transfer of Germans, a majority of local residents was displaced from this almost all German border area. The German-Czech relationship development in Jesenicko is summed up in the first part of the thesis. Particular measures against Germans as well as Benes decrees and the transfer of Germans are analyzed in detail in the second part. The aim of this bachelor thesis is to assess the consequences of transfer of Germans that are mentioned in the third part. The emphasis is placed on economic and social impacts that are completed with a practical demonstration of a change in asset-legal relations in one village in Jesenicko. A part of the analysis is also a replacement of the German minority by new settlers in the process of settlement. The bachelor thesis is based on unpublished (archived, oral history) and published resources and special literature and it uses historical and economic methods (i.a. statistical, biographical).
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Determination of transfer pricing using alternative methods
Kubešová, Lucie ; Francírek, František (advisor) ; Málek, Jiří (referee)
The focus of this thesis is alternative methods used to determine transfer pricing in practice, mainly in the environment where there is a lack of available comparable information in the market. The paper is divided into four chapters. The first lists basic terminology, available relevant legislation and briefly outlines particular methods of determining a transfer pricing as recommended by OECD directives and the use of those. The second chapter focuses mostly on identifying of an interval for transfer pricing acceptable for tax authorities under a sale of an enterprise or its part. The third chapter mentions further alternative methods for which the underlying asset for determining of transfer price are financial derivatives. The last chapter discusses the results of carried out analyses and presents recommendations to using alternative methods. The thesis contents are supported by a designed computer program, which is a key element for using the alternative methods in practice.
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The Transfer of Sudeten Germans after the World War II. - Economical and Political Context
Lukášová, Tereza ; Váňa, Daniel (advisor) ; Szobi, Pavel (referee)
In the first part of this work I will remind basic landmarks of the Czech-German cohabitation in the historical area of Bohemia, Moravia and south part of Silesia as it is reflected in historical literature. In the main part I will analyze various president's decrees concerning the German minority in the postwar Czechoslovakia and describe the executive process of its creation. I will shortly describe the process of the transfer itself. A part of my work will be an analysis of the impact of the transfer of Germans on various sectors of Czech economy. Finally I will follow up how was this situation handled economically, politically and demographically. During this work I will ask myself i. a. these questions: What led to the transfer? How was the transfer realized? What were the economic and social consequences? How was the problem of resettlement in Sudeten area solved?
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The Awareness of HIV/AIDS among students of the Secondary Health School in Písek
NOVOTNÁ, Jana
HIV / AIDS places many governmental, national and international organizations in a difficult situation. Despite the global efforts aimed at the prevention and treatment of this disease, the number of HIV positive persons as well as people dying of AIDS is increasing every year. It is considered that a key role to reduce this trend is played by education, especially among teenagers, who are one of the most vulnerable groups in the transmission of HIV / AIDS. Healthcare professionals should have enough quality information about the issue of HIV / AIDS, because it may just be they who will be one of the links leading to the reduction in the incidence of this infectious disease. This thesis, titled ?Informing students of the Secondary Medical Schools Písek about HIV / AIDS?, contains two parts. The first one is theoretical and it deals with general issues of HIV / AIDS, its characteristics, history, epidemiology, transmission, clinical picture, diagnostics, and treatment. Moreover, it deals with possible methods of preventing HIV transmission, including prevention of HIV transmission in healthcare facilities. This part does not omit the role of peer education and nurses as possible mediators for the transmission of information on preventing HIV / AIDS transmission. The second part summarizes the results of quantitative research, which was conducted with the participation of students of the Secondary Medical School in Písek in the survey. The questionnaire, intended for the students of the said school, was designed in order to verify the knowledge of future healthcare professionals about HIV / AIDS and also it asked whether the students, as adolescents, behave in a way as to increase the risk of HIV transmission. In the questionnaire, which contained 22 questions, the students could express their subjective views on the quality and amount of information about HIV / AIDS provided in their classes at school. The research results were processed and presented by the graphs, bar as well as pie ones, in the empirical part of this thesis. After reviewing the results from the questionnaire these hypotheses were confirmed: H1 Students know the methods of preventing HIV infection. H2 Higher-form students have a wider knowledge of the principles of HIV / AIDS than students of lower forms. In contrast, hypothesis H3 was disproved , which was: ?Students of all forms at the SZŠ in Písek have more information on HIV / AIDS, as compared to an earlier research, than students of another non-medical branch secondary school?. For this purpose, the results of a thesis by Lucie Stříteská were used. Stříteská studied the level of knowledge about HIV / AIDS among students of a secondary vocational school in Valašské Meziříčí in 2008. The results of this thesis can be used by the Secondary Medical School in Písek, or its management and teachers, to learn about the level of students? knowledge about HIV / AIDS and to intensify education in areas where students do not have a good knowledge level during the study.
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Microwave interconnection, realization, used technologies and operation
OLIVA, Radim
This work deals with generally questions of microwave connections. In work we found information about wire-less transfers dividend in line with frequence ray inclusive abstrakt of technology. Also there are general information about wireless transfer, used modulations and data security during the transfer. In praktical part we located concrete project of concept data trace, on which I worked and took part on realization.
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Incidence of Blood-Born and Sexually Transmitted Infectious Diseases with Focus on HBV and HCV in the Central Bohemia Region.
VELEKOVÁ, Petra
Viral hepatitides B and C are among the most widespread and at the same time most serious blood-born and sexually transmitted infectious diseases. The World Health Organisation considers the incidence of both infections to be an epidemic and, according to its estimates, there are 2 billion of people infected by hepatitis B virus and over 170 million of people infected by hepatitis C virus worldwide. Viral hepatitides B and C are diseases infecting the liver frequently becoming chronic and presenting a major factor in hepatocellular carcinoma development. Acute hepatitis C allegedly develops into chronic condition in approximately 85 % of CASE, and around one third of chronic hepatitis C patiens develop cirrhosis and many of them a liver carcinoma. There is a direct correlation between the incidence of acute hepatitis B developing into a chronic condition and possibly leading to cirrhosis or a hepatocellular carcinoma and the patientś age, it is indicated at 90 {--} 95 % in neonates, at 25 {--} 50 % in 1 to 5-year-olds, at 5 {--} 10 % in older children and adults. These diseases also have considerable socioeconomic impacts. Vaccination has been the most effective preventive measure agains viral hepatitis B, so far, no effective vaccine has been found for hepatitis C virus. The fundamental precautions against both types of viral hepatis consist in non-specific prevention related to the means of transmission of infection, namely avoiding contact with blood and other body fluids of any infected person. Both hepatitis B and C are most frequently trasmitted parenterally, by means of sexual intercourse, vertical transmission is less common. Before the introduction of screening tests for blood donors, viral hepatitides B and C were most frequently transferred via blood transfusion. At present, intravenous administration of illicit drugs presents a major risk factor due to sharing needles, syringes and other instruments among users. The theoretical part of the thesis summarizes present day knowledge on viral hepatitides B and C. The practical part focuses on the incidence and means of transmission of viral hepatitis B and viral hepatitis C in the Central Bohemia Region within a 10-year period. I also aimed to examine viral hepatitides B and C transmission risks awareness, and safe-sex rules observation among a selected group of the Central Bohemia population.
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