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Změny mléčné užitkovosti ekologicky chovaných dojnic v průběhu roku
Skřivánek, Miroslav
The following dissertation deals with the description of changes in the milk yield of organically reared dairy cows during the year. Observations and experiments for this work were performed on the Organic Agricultural Farm in Branná, the Jeseníky mountains, the Czech Republic. The dairy herd of the farm consists of an average of 127 dairy cows of the Czech spotted cattle breed. It was a herd with a closed herd turnover with an average of 18% of the turnover of pieces per year. Individual samples of milk for the purpose of determining its components were taken in the monitored period, from March 2017 to February 2020 during the performance check once a month directly in the farm milking parlor by a breeding technician, in the presence of the milking parlor staff. Pool samples of milk were taken during the collection of milk to the purchase organization by drip. During the suction of milk into the tank there was a continuous collection of supplier and tank sample In individual and pooled milk samples, the following parameters were monitored and recorded during the control period: milk production, milk yield (kg), the amount of fats (%), the amount of proteins (%), the amount of lactose (%), the amount of somatic cells (thousand/ml), the amount of urea (mg / 100ml) and the amount of free fatty acids (mmol / 100g of fat). The samples were analysed, and three sub-experiments were performed from the obtained data: Experiment I: evaluation of the influence of individual months of the year on the number and composition of individual milk samples. Experiment II evaluated the effect of lactation order on the number and composition of individual milk samples. Experiment III compared selected parameters of individual and pooled milk samples.
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Integration of Geovisto library components
Utíkalová, Iva ; Lazúr, Juraj (referee) ; Hynek, Jiří (advisor)
Many tools have been created for the visualization of geographic data with different purposes and with different level of abstraction. Among the tools for data visualization on web applications in 2021 also included by the Geovisto library. This tool was created in order to easily visualize geographic data, which, according to the user’s choice, converts the input data into a visual form and allows easy configuration of this display. Due to unsatisfactory current status web application that presents the Geovisto library, this work aims to redesign this application to attract more users or developers and convey information, how the library itself works. The new web application should be user friendly and easy for administrators to maintain.
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State of photovoltaic in the Czech Republic
Lukášek, Kamil ; Bača, Petr (referee) ; Vaněk, Jiří (advisor)
Photovoltaic in the Czech Republic has gone through significant development during last few years. The thesis describes physical principle of converting solar energy into electrical energy using photovoltaic cells. Photovoltaic power plant is a set of technologic components connected together to utilize solar energy and convert it into electric energy that could be distributed to electric power network. Review of the photovoltaic development in the Czech Republic and the list of the biggest operational photovoltaic power plants present important data for assessment of the current status of photovoltaic technology in the Czech Republic. Chapter operations and maintenance of photovoltaic power plants summarizes the most common causes of failures and presents diagnostic tools for service requests. Due to legislative changes, hybrid photovoltaic power plants construction has been prioritized as it is economically more efficient now. Construction of new hybrid photovoltaic power plant was assessed analytically using SWOT analysis that evaluates strong and weak sides of the projects in comparison with opportunities and threats of construction. After evaluation of obtained data the next steps of the hybrid photovoltaic power plant’s construction plan are proposed. The first part of hybrid photovoltaic power plant design contains PVGIS program's data evaluation, which provides sunlight intensity information for specified area. Obtained data were used in the second part of the design to determine proper components selection for family house hybrid photovoltaic power plant. Finally the economic view of the design and return of investments were assessed.
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CIP Safety
Šmoldas, Michal ; Stibor, Karel (referee) ; Štohl, Radek (advisor)
This master´s thesis deals with the analysis of CIP technology and the creation of laboratory tasks from components based on this technology. The aim of the thesis is to create a literary research on CIP technology and its individual extensions focusing on CIP Safety. Further, a functional laboratory panel is assembled from the available components in the FEKT VUT Brno laboratory supporting this technology CIP Safety, specifying the assignment of the laboratory task. Functionality of the panel has been verified by the SW solution of the laboratory task with visualization and control of the virtual production line. The result of the work is literary research on CIP technology, functional laboratory panel, specification of assignment of laboratory task and SW solution of task with visualization and control of virtual production line.
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Improving of reliability for NPP
Dubovský, Dávid ; Šen, Hugo (referee) ; Nerud, Pavel (advisor)
The aim of this paper is to describe and evaluate the reliability of nuclear plants at Bohunice (EBO). Then illuminate the methods for increasing the reliability and specify one of them (INPO AP 913). After describing the methods, summarize the work results of this method and proposes the way of application.
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Wireless model 802.11 in NS2
Botta, Miroslav ; Kubánková, Anna (referee) ; Šimek, Milan (advisor)
Theme of this work is simple wireless simulation Network Simulation 2 tool. The work consists of more parts. In the first section is basic theory about Wi-Fi networks, they types and standards and describes how useful can it be in practical life. In the second section there is a short annotation for programming in TCL language and possibilities of NS2 for simulating wireless networks. In the end there is a complex simulation of this network. In the third part there are two complex tasks where the information’s are drawn from the previous two parts.
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Wireless 802.11 IP Networks and their models in the OMNeT++ simulation tool
Jakúbek, Peter ; Burda, Karel (referee) ; Růčka, Lukáš (advisor)
The bachelor work concentrates on familiarization with the standard IEEE 802.11. The work summarises the advantages, disadvantages, history and grouping of this standard according to norms. The great attention is paid to a user’s familiarization with the stimulating tool OMNeT++ and its extension Inet Framework. This extension helps to amplify the simulator for a supporting modelling of wireless nets. It supports models of a few protocols such as IP, UDP/TCP, Ethernet, PPP, IPV6, OSPF, RIP, and MPLS. It includes already programmed API modules from which is possible to create easily a wireless IP net.Programmes needed for a proper functioning of the OMNeT++ are described in corresponding paragraphs. A part of work deals with an installation and setting of programmes for accurate functioning of a compiler surrounding. Our work analyzes possibilities and manners of simulation of wireless IP nets which helps to create basic simulation model represented by standard 802.11. There are also included laboratory works in our bachelor work, which includes theoretical introduction to studied issues. Tasks are concentrated on ad-hoc and infrastructure mode. These tasks comprise of theory of problematic, detailed instructions for creating together with explanations, processed results and output of simulation
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A Component Design Framework in Nette Environment
Kvita, Michal ; Milička, Martin (referee) ; Burget, Radek (advisor)
This bachelor thesis describes the design and implementation of framework for simplification of creating, managing and using of components in Czech PHP framework Nette and its template language Latte. Project is realized as a library with help of the system of extensions in Nette. The library respectively uses markup language XML and internal configuration format of Nette called NEON. Text also contains analysis of that parts of Nette, which are relevant for this topic. Final solution is demonstrated on simple application and in conclusion future possible expansion is discussed.
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FACTORS LIMITING LIFE TIME OF NUCLEAR POWER PLANTS WITH PRESSURIZED-WATER REACTORS
Křivánek, Robert ; Kolat, Pavel (referee) ; Liszka, Ervin (referee) ; Fiedler, Jan (advisor)
The aim of the thesis is to analyze the state of preparedness of nuclear power plants (NPP) for long term operation (LTO) based on the IAEA SALTO (Safety Aspects of Long Term Operation) peer review service, analysis of the most significant failures, accidents and operational experience with type reactors PWR/VVER focusing on cases caused by equipment ageing and identification of major structures and components limiting life time of PWR/VVER-type nuclear power plants, and possible measures to ensure their required service life. Based on the results of the IAEA SALTO peer review service, an analysis of the main deficiencies and measures of NPPs in preparation for a safe LTO was performed, focusing on topics whose deeper knowledge is important for the future more precise determination of technical factors limiting the lifetime of NPPs. The main deficiencies and measures in the preparatory phase for LTO and the most important technical measures are summarized in chapter 4.5. The main deficiencies and the most important technical corrective measures in the area of ageing management of structures and components are discussed separately. The history of major failures and operational experience of nuclear power plants with PWR/VVER reactors from the point of view of ageing of structures and components is analyzed in chapter 6.2. The result is a statistic analysis of ageing-related events, an overview of the most significant PWR/VVER reactor failures with an impact on their service life, a statistical overview and discussion of the most important degradation mechanisms, and other important findings from the history of major failures and operational experience. Chapter 6.3 analyzes factors limiting the operation of nuclear power plants with PWR/VVER reactors with focus on structures and components potentially limiting the life of PWR/VVER reactors and possible measures to ensure their required life. In conclusion, the main reasons of permanent shut down of NPPs (actual and potential) for 40, 60 and 80 years of operation and the measures to ensure their required life are summarized.
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