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Wind power generation and energy accumulation possibilities
Krbal, Michal ; Mastný, Petr (referee) ; Drápela, Jiří (advisor)
The goal of this bachelor’s thesis is to inform about conditions of running and the character of running of the wind power plants and about the suitable storage systems for the possibilities of time invariableness of power supply. For these reasons is immediately in the first chapter of the thesis described state of using wind power plants in The Czech republic and other countries in Europe which produce electric power. Description of individual functional parts is important mainly from the point of electrician conversion of kinetic energy of wind to electric energy with help of the electric power generator with the highest efficiency and without need for maintenance. It is necessary to know those functional parts of the power wind to be able to design appropriate storage system. The output electric power is very variable at time, mainly output voltage, because wind energy is variable too. The characteristics of the wind power plants as output voltage, frequency and their switching graded at time have to in accordance with requirements of the electricity supply systems not to disturb the stability or even collapse of the electricity supply system which would lead to serious economic consequences. These predicaments can be prevented with precise meteorological forecast or by using the acceptable storage system with small acquisition and operating costs, requirements to safeness and long service life, low weight and high efficiency of conversion of energy. The storage systems are classified into centralized and decentralizing systems with requirements to dynamic running and running time. To fulfil these conditions it is essential to choose acceptable and accessible locations with year lasting qualities of wind, which are being checked in advance using measurement and mathematical calculations.
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Energy from Agricultural Land
Šatra, Jan ; Bičík, Ivan (advisor) ; Musil, Ladislav (referee)
Thesis is concerned with relation of usable energy and space as it's widely spread source. For this purpose are introduced not only a few indicators suitable to energy management description, but also principles of environmental assessment thinking are expained, as these help to distinguish the really sustainable ways of deriving energy from space. As examples of energy-from-space extraction are introduced photovoltaics, liquid biofuels and fast growing energy plants. After a brief entry to heat supply problematics, focus is remains on a simple case study: quantifying relationship between local heat demand and local potential production of solid biomass from short rotation coppice. This so far rather hypothetic relation is examined at the municipal level, while Central and South Bohemia regions are the target area. Soil characteristics and population census data (2001) about residental habitats are used.
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Reduction of brass corrosion layers using hydrogen plasma
Řádková, Lucie ; Grossmannová, Hana (referee) ; Krčma, František (advisor)
The main topic of this Diploma thesis is the application of low-pressure low-temperature hydrogen plasma for the treatment model samples of rusted brass. Plasmachemical treatment of metallic artifacts is a relatively new way how to remove corrosion of artifacts. The temperature of an object should not exceed 150 °C during the treatment. Corrosion layers were prepared in an ammoniac corrosion atmosphere. The corrosion formation took two weeks. Energy Dispersive X-ray Microanalysis has shown that the corrosion layer was formed by carbon, oxygen, copper, zinc, and lead. The corrosion layers were blue-colored with white crystals on the surface. Except those two colors, brown color was observed on corrosion layers, too. The plasma reactor was a quartz tube with outer copper electrodes and supplied by the RF source of 13.54 MHz. The reactive atomic hydrogen was formed in plasma discharge. This atomic hydrogen reacted with the corrosive layer containing oxygen. This reaction created an unstable OH radical, which emitted light in the region of 305–320 nm. This radiation was detected by the optical emission spectroscopy and it was applied as process monitoring quantity. Rotational temperature and intensity of OH radicals were determined from obtained data. The sample temperature was measured by thermocouple installed inside the sample volume. Rusted samples were treated by low-pressure low-temperature hydrogen plasma. 16 samples were treated at different conditions – plasma power was 100 W, 200 W, 300 W, and 400 W at continuous mode and pulse mode with duty cycle of 25 %, 50 %, and 75 %. The pressure was between 140–160 Pa at hydrogen flow rate of 50 sccm. Samples after plasmachemical treatment were grey colored with white crystals on their surface. Corrosion layers were removed by spatula. The corrosion layers of some samples were easy removable, some others were difficult. Energy Dispersive X-ray Microanalysis, which was carried out after the treatment of 2 selected samples (400 W, 50% pulse mode and 400 W, 75% pulse mode), showed different amounts of carbon, oxygen, copper, zinc, and lead compared to the rusted sample. Other elements in the treated layer were silicon, sulfur, chlorine, and fluorine.
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HVAC design for burn intensive care unit
Fábian, Martin ; Andrys, Petr (referee) ; Rubina, Aleš (advisor)
The Bachelor’s thesis describes a design of a HVAC unit for a burn intensive care unit and its related nursery rooms. The unit respects all the hygienic, functional and running conditions at this specific indoor microclimate. The main concept of the HVAC unit is to supply the burn intensive care unit with fresh air, which is suitable for a fast recovery after a burn trauma and also to reduce the microbial growth and microbial spreading. The main goal of the Bachelor’s thesis was to design a HVAC unit that will effectively filter the inlet air and that the intensive care unit is built the way, to reduce the microbial spread as much as possible. The air handling units are designed at the calculation part of the Bachelor’s thesis to cover the energy (heat) loss in the winter time and the energy (heat) gains during the summer time. Main function of the air handling unit is to handle filtered fresh air to the hospital. The output of the Bachelor’s thesis is a realization documentation for both air handling units.
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Methods of runoff components separation
KUBEŠ, Ondřej
The paper deals with monitoring and measurement of runoff. This is particularly important to identify water supplies in the catchment area, or timely detection of extreme hydrological events such as floods and droughts, and because of the potential rate of spread of pollutants. The value of the runoff is particularly important for irrigation needs for agriculture. Further work is focused on the individual components of runoff, the methods used for their separation and a detailed description of various types of runoff. The practical part includes measurement of the discharge at the Jennínsky stream catchment, located near the border with Austria, the Český Krumlov district. For analyses discharge from the hydrological years 2005 ? 2008 was chosen. And using the three selected methods of separation (method GROUND, method and method MPGM digital filter according to Chapman), which are further described and explained. These methods divide runoff into the baseflow component and direct runoff component. These results are further compared with the method of reccesion curve analyses performed on four events. The work should show the differences in results of various methods.
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The care of skin in Anaestheziology - resuscitation department and Intensive care unit
MUŽÍKOVÁ, Eva
My Bachelor Paper, focused as indicated in the title, relied on questionnaires distributed among nurses to find out whether they could access with sufficient readiness the anti-decubitus aids and hygiene agents needed for proper care of the patients. Moreover, through inconspicuous observation I tried to make sure the patients had the aids readily available. The first hypothesis, proved warranted, predicted that the nurses took proper care of the patients' skin in conformity to the relevant nursing standards. This hypothesis could be confirmed because I had a chance of reading standards used to regulate practices at the health-care facility being investigated. The nurses had available an adequate range of aids required to adjust the patients' positions, keep the patients clean and take care of their skin. The second hypothesis predicted that the ARW and ICU patients had available the anti-decubitus aids. Now, with the questionnaires reviewed and the observation completed, I can conclude that this hypothesis has been confirmed as well. I believe, the care is also dependent on sufficient supply of bedclothes available the wards and units; judging from my observation and the questionnaires returned by some selected nurses, the bedclothes are in no short supply. The occurrence of decubitus ulcers in these patients is not extremely widespread, and their injuries heal mostly per primam. The nurses try to improve their relevant qualifications by reading vocational periodicals and attending thus oriented seminars - obviously, they pay proper attention to these issues. The Paper endeavored to map the care of skin provided by nurses at the AR Ward and the IC Unit. In my opinion this objective has been met. To get a better idea of my research results, please see the related charts.
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Conflict minerals and the Democratic Republic of Congo
Kocúnová, Oľga ; Pavlík, Petr (advisor) ; Šaroch, Stanislav (referee)
As already the title of the diploma thesis is saying " Conflict minerals and the Democratic republic of Congo" aims at discussing issues around conflict minerals produced in DRC, including illicit trade, exports, smuggling minerals from DRC and committing crimes such as human rights abuses including rapes, sexual violence, executions, forced recruitment, abduction, child work etc. The militarisation mostly in eastern parts of the country leads to escalated conflict, in which rebel groups are warring in order to obtain power and control over rich natural resources in country. Long lasting conflicts, insecurity in the country, failed governance, wide-spread corruption, illegal exploitation of natural resources and of miners as well have reach the level of poverty, economic weakness, as well as political inability to lead the country and control its own natural wealth and prevent from any kind of foreign touch, mostly by armed or rebel groups. This thesis presents measures, which have to be taken in order to mitigate rebel groups power in the country, enhance transparency, remove corruption and exercise due diligence for responsible supply chain and thus strengthen economic and political development as well as human right
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Czechoslovakia and Israel 1947-1949: the Era of Friendship
Habermann, Tomáš ; Míšková, Alena (advisor) ; Václavů, Lubor (referee)
As it is clear from the title, this thesis is focused on the development of international relations between Czechoslovakia and the nascent state of Israel in 1947-1949. For the Jews, the year 1947 represents a significant time period. The UN granted them the right to their own state in Palestine, which they should have shared with the Palestinian Arabs. Czechoslovakia figured among the states that prepared the draft of the United Nations Committee on Palestine (UNSCOP) and took part in the creation and implementation of this draft in a significant way In addition to this help in the UN our government also began to support the Jewish requirements in other ways. In order to resist the invasion of the neighbouring Arab countries the Jews urgently needed weapons. These weapons were delivered from Czechoslovakia in 1947-1949 despite the arms embargo declared by the UN over this area. Total volume of the supplied military equipment is estimated at more than 1 milliard crowns. Since the Israelis needed weapons as soon as possible, a secret airlift between a Czechoslovak airport in Žatec and some airports in Israel was established from May to August 1948. This covert operation became a symbol of excellent mutual relations in the tracking period. Not only light weapons (infantry rifles and machine guns)...
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Marketing Strategies in Fashion Industry
Čmielová, Zuzana ; Král, Petr (advisor) ; Richter, Stanislav (referee)
The goal of this thesis is to define the fashion industry and identify the key developments that the segment has undertaken over the last two to three decades including the drivers behind these changes. Specifically, the thesis will provide insights into the financial indicators of the industry and review some of the most recent trends such as globalisation of supply chains and internationalisation of fashion retailers. The second section of the theoretical part will try to identify what are the characteristics of fast fashion customers and what influences motivate their shopping behaviour. Specifically, some of the academic concepts will be examined and put into the context of fast fashion -- these include fashion involvement and fashion consciousness, the influence of opinion leadership and the trend of social shopping. The latest part of the theoretical section will examine the contemporary marketing strategies in the fast fashion segment some of which has been spread over the whole fashion market. Amongst the most vital ones is the change in supply chain management strategies, the shortening of the fashion life cycle and its impact on the frequency of stock replenishment. In addition, the theoretical part will examine the rising power of the internet, its effect on online shopping and the overall transformation of media towards digital communication with the growing influence of fashion bloggers. The goal of the practical part of the thesis is to conduct extensive analysis of the fashion strategies of the two selected fast fashion retailers -- Zara and H&M. These were chosen on the basis of their global success and outstanding financial performance even in the period of economic downturn which makes their strategies unique and worth analysing. Each brand has a distinct approach to its marketing strategy and in many of the elements they are fundamentally different, yet both approaches has enabled the brands to achieve international success and build highly profitable businesses. To review the complexity of different aspects of their strategies, the 7p's framework will be used.
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Parenteral nutrition in nursing care
KIŠŠOVÁ, Katarína
Parenteral nutrition is a method whereby all necessary nutritional elements are supplied to patients most often directly into the bloodstream, bypassing the digestive tract. Parenteral nutrition, though, represent a non-physiological route for the supply of all essential elements. It is a method that benefits patients and improves their nutritional status at a time when they are unable to use their digestive tract. Nonetheless, parenteral nutrition is not the best option for patients. It involves a number of disadvantages and complications. The nurse plays a fundamental role in patient nutrition. She should thus have the necessary knowledge regarding patient nutrition. She should keep in mind that by administering parenteral nutrition she is ensuring that the patient receives an adequate caloric and nutritional intake at a time when he/she cannot use his/her digestive tract. Quantitative research with the aid of questionnaires was used to expound the bachelor degree work entitled ``Parenteral nutrition in nursing care{\crq}q. The anonymous standardized questionnaire technique was used to collect data. The questionnaires were distributed to nurses working in standard and intensive care wards in the Czech and Slovak Republics. Two goals were set. The first was to determine the degree of adherence to all the principles of preparation and administration by nurses in the Czech and Slovak Republics. The second goal was to chart the issue of parenteral nutrition in nursing care in the Czech and Slovak Republics. Five hypotheses were thus set out on the basis of these two goals, which were both met. Of these, four hypotheses were confirmed and one was disproved. The first hypothesis assessed whether nurses in the Czech Republic have greater experience with the administration of parenteral nutrition compared to nurses in the Slovak Republic. Based on the results of the questionnaire-based investigation, this hypothesis was confirmed. The second hypothesis assessed whether the nurse knows how to prepare all-in-one parenteral nutrition. Although the results of the questionnaire-based investigation were not always satisfactory, this hypothesis was confirmed. Most nurses do know how to prepare all-in-one parenteral nutrition. The third hypothesis assessed whether nurses adhere to all the principles of parenteral nutrition administration. Despite certain errors in the principles of parenteral nutrition administration, this hypothesis was confirmed. The fourth hypothesis assessed whether nurses prefer administering parenteral nutrition to administering enteral nutrition. This fourth hypothesis was also confirmed on the basis of the investigation results. The fifth hypothesis - ´a greater number of nurses appreciates the positive rather than the negative aspects when administering parenteral nutrition´ - was not confirmed. Processing of the questionnaires showed that nurses are more aware of the negative rather than the positive aspects when administering parenteral nutrition. Although most nurses often do not know what is a positive and what is a negative aspects when administering parenteral nutrition to patients. The Head Nurse of Motol Teaching Hospital has requested that we provide her with the research results. These results will also be sent to the head nurses of two teaching hospitals in the Slovak Republic. It will be possible to use the results of this research to further the quality of nursing care.
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