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Influence of underground installation conditions on crack propagation in polypropylene pipes
Tesař, Jakub ; Gratza, Roman (referee) ; Hutař, Pavel (advisor)
The thesis addresses the issue of buried polymer pipes and the impact of installation conditions on their lifetime. Based on data obtained from standards, the values of external loads acting on the polymer pipe are determined. To apply these values in numerical calculations, the conversion of individual load components is also provided. Various stress values, simulating different burial installation conditions, are applied to a 2D model. The numerical calculation of the 2D model includes the progression of tangential stresses and their comparison with the standard. Furthermore, the influence of installation conditions on the burial depth of the pipe is analyzed. The comparison of models is conducted for both 2D and 3D models against the standard. The comparison verifies that the models are equivalent and closely correspond to the basic calculations according to the standard. The 3D model is then extended to include a crack, and the propagation through the pipe wall under the most critical load conditions is modeled. The concept of linear elastic fracture mechanics is used to estimate the lifetime of the pipe.
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Meaning of National Radiation Monitoring Network
Tesař, Jakub ; Kaufmanová, Marie (referee) ; Havránková, Barbora (advisor)
This Bachelor's thesis makes sense self-contained overview of National Radiation Monitoring Network. It explains meaning of Radiation Monitoring Network. Otherwise there is written about monitoring in case of normal radiation situation and emergency radiation situation. Conclusion is rendering of meaning Radiation Monitoring Network in case radiation incident, radiation accident or radiological emergency.
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Assembling and Functional Verification of a Home 3D Printer
Tesař, Jaroslav ; Zouhar, Jan (referee) ; Sedlák, Josef (advisor)
This thesis was created as a bachelor project in the Faculty of Mechanical Engineering at VUT in Brno. In the theoretical part, the additive technology Rapid Prototyping is introduced together with the most common methods, followed by the assessment of advantages and disadvantages of the new technology and its possible uses in various fields of human activity. In the experimental part of the diploma thesis was assembled and the printing parameters were set. Consequently the comparison models were printed on the 3D home printer and on professional printer Dimension uPrint. The accuracy of the printers is compared. The thesis concludes with the analysis of technical and economical parameters.
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Coordination of operation of PST transformers in the interconnected region
Tesař, Jan ; Topolánek, David (referee) ; Bátora, Branislav (advisor)
This master’s thesis deals with phase-shifting transformers (PST) and coordination of electrically close devices in an interconnected region. Theoretical research is performed in the work, describing methods of power control, function and design of PST, as well as actual methods of PST coordination in the rest of the world. Based on the research there is an optimalisation algorithm designed in MATLAB, which computes recommended tap petting of PST based on the network configuration. In the second part of this thesis there are described components of this algorithm and also presented the results of three demonstrative scenarios. Algorithm is able to solve minor problems in the network; more complex problems are beyond its solving ability. For an improved functionality there is a necessity to further expand this algorithm by a network redispatch solving algorithm.
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Graphene transfer methods for high quality graphene field effect transistors
Tesař, Jan ; Kormoš, Lukáš (referee) ; Procházka, Pavel (advisor)
This bachelor thesis is focused on the influence of different graphene transfer methods on its quality. Graphene layers were grown by Chemical Vapour Deposition (CVD) method. The quality characterization of subsequently transfered graphene is based on the measurement of charge carrier mobility which has been performed on the field-effect transistors fabricated by transferring of graphene layers onto Si/SiO$_2$ surface. Chemical etching and electrolytic delamination are the transfer methods that are being compared in this thesis. Results of the measurements showed that graphene layers transferred by electrolytic delamination exhibit approximately four times higher charge carrier mobility than those transferred by the chemical etching method.
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Electrical installation in family house
Tesař, Jan ; Procházka, Petr (referee) ; Ondrejček, Vladimír (advisor)
This Bachelor Thesis is concerned with the design of the electrical installation of a family house. There are two main parts of the thesis – theoretical basis and the main design. In the theoretical part the reader is at first introduced to a powerline section, in which the electrical installation from the powergrid to a terminal equipment is described. Next part is about a low voltage wiring, where the commonly used types of wiring and devices are described. In the third part the reader can read about a lightning protection and its inner and outer parts. The main design consist of situational designs of devices and wiring in the house, switchboard designs, revision of the electrical protection and the technical report.
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Information System Changes
Tesař, Josef ; Vysloužil, Jiří (referee) ; Koch, Miloš (advisor)
In this thesis work I focus on the field of information technology, specifically business information systems. Recently is growing the market for these products, which save time, are internal tool of communication, assist in the management and facilitate decision in the business. One of the many suppliers of ERP solutions is the company K2 atmitec Ltd. The firm must meet potential customers and keep abreast of new trends in information systems. and company, which has a long-term stable position is threatened with decline. In order that competition and the economic crisis don't endanger the position of company , I analyze the product, propose changes and innovations that will lead to greater attractiveness among potential customers.
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Safety and fluency increasing - road I/43 Černá Hora - Sebranice
Bažant, Petr ; Tesař, Jiří (referee) ; Všetečka, Martin (advisor)
A part of the road I/43 in the section between Černá Hora and Sebranice is the subject of diploma thesis. The output of thesis is to identify problematic parts of the safety and fluency of traffic and to propose appropriate measures. The road I/43 is very problematic and discussed of these aspects. Becouse of the character and the results of traffic accidents is called Highway of death. The thesis contains proposals of structural modification in selected problematic sections. These structural modifications are intended to increase the safety of traffic, but in order to limit of flow of traffic. Depending on the long-delayed contruction of expressway R43 is in order to make quick and effective increase the safety and the fluency of traffic counting with traffic intensity in the full range.
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Application of modern methods for production of mobile phone storage stand
Tesař, Jaroslav ; Nejedlý, Jindřich (referee) ; Sedlák, Josef (advisor)
The thesis was made as a bachelor’s project on Faculty of Mechanical Engineering, Brno University of Technology. In the theoretical part methods of Reverse Engineering were described. The principle of the following technology, the Rapid Prototyping, was also explained and the summary of advantages and disadvantages and use in technical practice for the most important methods was made. In the experimental part of the thesis the modern methods were applied for manufacturing a cell phone holder. By this the possibility of these technologies to work with complexly shaped models was verified. The casting to a silicon form was used as the alternative method of manufacturing. The summary of possibilities of manufacturing with these technologies and technical and economical evaluation were made in the end of the thesis.
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The Students themselves - Student Center Poříčí
Kálalová, Kateřina ; Tesař, Jan (referee) ; Mikulášek, David (advisor)
The house of the student center complements city block with respect to the unique location on the corner by the river and with the respect to the near dominats, especially the monastery church in the neighborhood. There is a college menza with all facilities and areas for commerce in the ground floor. The upper floors are used for the student dormitory. You can find indoor and outdoor areas for the common activities of studets. The patio is the heart of the house.
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