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Evaluation of porosity in gravity - cast Al - alloy castings
Staňková, Markéta ; Nová, Iva (referee) ; Čech, Jaroslav (advisor)
Solving of this diploma thesis is evaluation porosity in sequence on mechanical properties from different Al alloys. Castings were made by gravity casting to the iron-mould or gravity casting to the sand. Measurements (mechanical properties, porosity, DAS - dendrite arm spacing, shape factors and sphericity) were statistically analysed and dependencies which were detected were processed to the graphs.
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Analysis of measured parameters of the cardiovascular system
Lysoň, Jakub ; Vítek, Martin (referee) ; Kratochvíla, Jiří (advisor)
This bachelor thesis talks about the measurement of heart electrical activity by twelve lead ECG. The diagnostic system Biopac is used for measurement, featured by the computer program Acqknowledge. The own authentic method is designed to detect effect of load on increasing in blood pressure and heartbeat. Using a statistical procedure for testing hypotheses in this area the measurement results will be evaluated. For the analysis of measured data in time and frequency domain was used program Matlab, in which the measured results were imported. It was created functions that are implemented in an medium of Guide to the graphic design program.
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Entropic random number generator
Kukko, Marcel ; Zeman, Václav (referee) ; Burda, Karel (advisor)
The paper is focused on the random number generation by personal computer. It describes the most widely used types of random sequence generators and methods for their testing. The second part is focused on the design of the generator and an analysis of its testing.
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Assessment of the Impact of Internal Construction Changes in Appartments on the Market Value
Vlastníková, Tereza ; Jandásková, Tereza (referee) ; Cupal, Martin (advisor)
The thesis analyses the impact of building renovation on the market price of a property. The analysis uses a particular type of property - a flat in a prefabricated house. A database of offered market prices before and after the building renovation was created. The price of the building renovation was made by an itemized budget. The data, which were obtain in this way, were then submitted to s detail analysis and statistical testing. The result of the analysis was to determine whether the cost of the building renovation impacted the market value of the property and whether it was evaluated
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Analysis of measured parameters of the cardiovascular system
Lysoň, Jakub ; Vítek, Martin (referee) ; Kratochvíla, Jiří (advisor)
This bachelor thesis talks about the measurement of heart electrical activity by twelve lead ECG. The diagnostic system Biopac is used for measurement, featured by the computer program Acqknowledge. The own authentic method is designed to detect effect of load on increasing in blood pressure and heartbeat. Using a statistical procedure for testing hypotheses in this area the measurement results will be evaluated. For the analysis of measured data in time and frequency domain was used program Matlab, in which the measured results were imported. It was created functions that are implemented in an medium of Guide to the graphic design program.
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Rabdom number generators
Mikulka, Zdeněk ; Schimmel, Jiří (referee) ; Zeman, Václav (advisor)
This thesis concerns with methods of pseudorandom numbers generation. It focus on software generators. There are pseudorandom number generators divided according to the way of generation and described single types. The next part describes methods of testing for quality of random and pseudorandom number generators. They are divided into theoretical and statistical tests. Some of these tests are used on available generators. The evaluation is based on results of these tests.
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Human hearing sensitivity assesment
Tinka, Dominik ; Sekora, Jiří (referee) ; Škutková, Helena (advisor)
Bachelor thesis aims to evaluate changes of sensitive human hearing through created mobile application. According to obtained teoretical knowledges mobile application provide audiometrical measurements. In connection with this is described adjustments of sound outcomes of mobile, which is set in pursuance of calibrate unit. In the next part is described methodics of measuring and processing measured data. Static evaluation is processed on collected measured data from one proband and group of probands. Measurements on one proband were repeated for couple of days. The end of this thesis discusses about obtained results, which challenges the hypothes about sensitivity of hearing.
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Measurement of cardiovascular parameters
Szpyrc, Bogdan ; Rychtárik, Milan (referee) ; Kolářová, Jana (advisor)
This bachelor thesis deals with the questions of anatomy and physiology of the heart. The diagnostic system BIOPAC is used in order to measure the electrical activity of the heart by a 12-lead electrocardiogram (ECG) and to evaluate the heart rate. The ECG signal is transformed into a vectorcardiogram (VCG) from which the direction of the electrical axis of the heart is deducted. Own experiment will be suggested in order to detect a load reaction and cessation of breath on the heart rate and a load reaction on an inclination of the electrical axis of the heart. A programme application will be designed so as to simplify the analysis of values. The application will allow reconstruction of the ECG signal into a VCG scheme and an automatic calculation of the heart rate and the inclination of the electrical axis of the heart. By means of a statistical analysis the results of measurements will be evaluated.
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Random number generators evaluation
Svoboda, Martin ; Sikora, Marek (referee) ; Zeman, Václav (advisor)
The topic of the thesis is random numbers and the problem of their testing. The thesis presents methods of generating random numbers and many statistical tests of randomness. Part of the work is a description of an application created for testing random numbers, which contains a set of 23 statistical tests of randomness and 5 integrated generators. In the last chapter, various types of generators and keys created by quantum key distribution are tested using the application.
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The power of two sample tests
Rózsahegyi, Dominik ; Maciak, Matúš (advisor) ; Komárek, Arnošt (referee)
Two-sample tests are one of commonly used statistical tools with which we make decisions if experimentally obtained data from different populations satisfy pre-specified statement. Suitability of using them could be dedicated by the power of test, which states for probability of rejection of invalid statement. The reader gets to know with terms of hypothesis testing which are necessary for introduction of tests. The second chapter introduce tests which could be used when analysed data are complete. If some observations are not exactly known, we call them censored and it is more suitable to use tests listed in the third chapter. We estimate the power for tests in simulations and observe its behavior with different conditions. 1
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