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Possibilities of Using Thermoelectric Converters in Power Industry
Halas, Miroslav ; Bartošík, Tomáš (oponent) ; Macháček, Jan (vedoucí práce)
This thesis deals with thermoelectric transformers and their application in electrical power engineering. First, a theoretical overview is shown within which major personalities of the thermoelectric field are presented. Then, construction, functionality and fabrication materials of the thermoelectric transformer are outlined. The next part covers utilization of thermoelectric transformers within electrical power engineering through the history up until now. Also major world-leading companies are presented. In the practical part, the possibilities of thermoelectric transformers in conjunction with primary power sources are shown. Then, power output of solar thermoelectric transformer during winter is calculated using balance methods. At the end, a design of thermoelectric transformer exploiting waste heat of coal power plant and its rate of return are presented. In the conclusion, findings made during this study are summed and a complex assessment of the topic is done.
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Mobile player for multimedia content presentation and processing
Króner, Tomáš ; Číka, Petr (oponent) ; Müller, Jakub (vedoucí práce)
Master’s thesis deals with developing of multimedia application that allow play and receive multimedia files as audio and video. In thesis introduction, there is theory overview about programming language J2ME, its parts and divisions in couple of chapters. The applications developing begin by choosing focus groups and also group of devices that agree with present trends about mobile devices. The next part undertakes selecting development tool NetBeans IDE based on requirements for multimedia develop and also undertakes selecting software development kit Nokia SDK and its short definition. Afterwards, the application and its basic classes and methods are briefly characterized. The chapters of classes and methods are divided according algorithm level, following development description dividing aspect. Program functions are enriched with flow diagrams completing written text, which have marked important points of program. The main chapters describing algorithm parts begin with define audio and video play. The other pages include description of network connection a data transfers. In every part the programmer part, algorithm is analyzed first and than general options and functionality of this area. In file play part, it is selection of file and proceeding to launch playing with function control possibility. In case of network connection, it is access to network and data handling, eventually communication with each other in client - server hierarchy and consequential multimedia content playing. In the end of development part, reader is cognizant of application fault handling that is inherently part of every application working with I/O data. Next chapter is devoted to future development a design resulting to present process. In the thesis it can be found also application description from user’s point of view, user manual a solving incurred problem situations. In the instructions, there are contained screenshots of described parts of program. Reached results and reviews are summarized on the end of the thesis.
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Possibilities of usage of electronic signature
Tomo, Milan ; Stejskal, Jaroslav (oponent) ; Smejkal, Vladimír (vedoucí práce)
The bachelor thesis „Possibilities of usage of electronic signature“ proposes to give complete information about technology, laws and possibilities of usage of electronic signature. It clarifies principles of digital signature like symmetric, asymmetric cryptography, HASH function. It explains used terminology like certificate, certification authority, etc. It compares laws concerning electronic signature in Czech republic and in Slovakia. It provides guide to acquisition certificate and its installation. At the end shows possibilities of usage of electronic signature in practice.
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Energy utilization of sewage sludge
Poláková, Annamária ; Ferdan, Tomáš (oponent) ; Frýba, Lukáš (vedoucí práce)
This bachelor’s work discusses the origin and composition of the sludge. The composition of sludge is given by legislation, as well as its treatment and processing. Sludge shall be adjusted in order to be used on agricultural land, landfilled, incinerated, etc. The sludge processes are described further in this work. Sludge disposal options are varied, but not everywhere equally represented. This is represented in chapter where treatment of sludge in Czech Republic and abroad are compared, illustrated in chats. The most extensive and most common method of disposal of sludge is application on the ground and burning. Usable energy is obtained by burning the sludge.
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The development trend of railway stations
Dubeňová, Ľubica
Dating back to the 1830s, railways were developed in Britain. The history of railway stations began with a transit station in which the reception area and the hall were separate buildings. This division of stations into two buildings, of which one is primarily representative and the other serves for engineering purposes remained the only architectural option for a long time and has not disappeared to this day. Soon after, they became a major mode of public transportation in many places across the world and served communities. Passenger stations became a new building type and gateways to rail lines connecting cities. Railway stations entered a new age again in the late 20th century after the introduction of high-speed trains. As evident mostly in Europe (and of course China), many new stations were built, and the old ones were renovated to efficiently serve the system. Once different transportation modes were unconnected, but today the trend is towards an integrated system. Many railway stations form an interchange between modes of transportation that may include buses, air services, metros, taxi, private cars, and so forth. Therefore the intermodal concept reflects a new form of service. In addition to serving intercity rail lines, the concept emphasizes linkages to other transportation systems, the expansion of service across borders, and rail networks linking cities and their suburbs. As a consequence, new forms of station type are required. International, airport, and metro or light rail stations represent different types emerging as distinctive building patterns for railway stations impacted by the intermodal concept.
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Audio power amplifier with audio processor and FFT analysis
Kubáň, Marián ; Frýza, Tomáš (oponent) ; Kratochvíl, Tomáš (vedoucí práce)
This thesis is concerning about design of an audio power amplifier for home listening. Amplifier involves two audioprocessors, the first one chooses one of the four avaliable audio stereo inputs. The second just sets the considered shape of frequency characteristic of one of the picked audio signal. As soon as tha signal leaves the audiprocessors, its path is divided. First route leads to the power amplifier and second one ends up in the analog to digital converter. Both audiprocessors are adjusted via IIC line by 8-bit microcontroller. The primary role of microcontroller is to enumerate frequency coefficients through the fast fourier transformation with Cooley-tukey algorithm. Result of FFT is then displayed on graphical display unit. The whole desired parametres as volume, trebble, input selection, atc., are driven with one controller and that is a rotary encoder.
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Critical Analyse of a New Reatail and its Development Prediction
Martáková, Andrea ; Fajkus, Jiří (oponent) ; Škapa, Stanislav (vedoucí práce)
The objective of the thesis “Critical Analysis of the new retail and estimation of its future development” is to present a close overview about retail real estate issue in Czech Republic. First chapters are focused on theoretical issues of the retail. The practical part is focused on space-time analysis of market characteristics in the Czech Republic, which provides theoretical insights and diffusion process of expansion of shopping centers. The outcome of this paper is an estimation of the future development of the new retail from the optimistic, realistic, and pessimistic views of the market characteristics, and a definition of the competitive parameters of the retail development.
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