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Detection of Sleep Apnea in Adults
Vrana, Vojtěch ; Králík, Martin (referee) ; Sekora, Jiří (advisor)
The goal of this work is to construct a device detecting apneic respiration pauses during sleep. The most common cause of apnea pauses is obstruction of the airways, eg, airway collapse. Apnea leads to a deterioration in the quality of sleep and increases the risk of cardiovascular disease. The controller is designed on the Arduino Uno development board. The whole measuring device consists of two circuits for measuring the external manifestations of movement of respiratory muscles and a microphone for measuring the presence of air flow.
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Heart Sounds Detector
Hlaváčová, Kristýna ; Králík, Martin (referee) ; Kozumplík, Jiří (advisor)
In this thesis deals with detection of heart sounds in signal. In first half of thesis is discussed anatomy, physiology of cardiovascular system and issue of heart sounds. Afterwards, devices for evalution phonocardigram signals and their analysis are described. Thereafter the work focuseson the algorithm for detection of the first and second heart sound, which was implemented in the MATLAB R2014a environment. In conclusion, there is a summary of the proposed method and statistic evaluation.
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Polysomnographic data analysis
Jagošová, Petra ; Králík, Martin (referee) ; Ronzhina, Marina (advisor)
The bachelor´s thesis is focused on analysis of polysomnographic signals based on various parameters in time and frequency domain. The parameters are acquired from 30 seconds long segments of EEG, EOG and EMG signals recorded during different sleep stages. The parameters useful for automatic detection of sleep stages are selected according to both visual analysis of boxplots and statistical analysis via comparison tests. EOG parameters selected in the time domain were mobility, skewness and kurtosis. Among EEG parameters, aktivity, 75. percentile, kurtosis and mobility were selected. Among EMG parameters, 75. percentile and complexity were selected. Finally, the parameters selected in the frequency domain were relative power spectra in alpha, delta and beta bands.
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ECG and PPG derived respiration estimation
Chmela, Radek ; Smital, Lukáš (referee) ; Králík, Martin (advisor)
This work deals with the estimation of the respiratory curve from ECG and PPG signals. The first part deals with the description and monitoring of electrical activity of the heart, physiology and methodology of respiratory sensing and photoplethysmography. The second part deals with methods of extracting respiratory cycle information from ECG and PPG recordings. The third part deals with the algorithmic implementation and evaluation of individual procedures for estimating the breath curve from both of the above-mentioned signals on records from the web PhysioNet. In the last part, the algorithms are compared and evaluated.
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Evaluation of physical fields in a landscape locality
Jílek, Michael ; Králík, Martin (referee) ; Smital, Lukáš (advisor)
The thesis is focused on gathering of theoretical backgrounds for geomagnetic measurements, measurement of electromagnetic and radiometric quantities in a natural locality, and subsequent evaluation of the obtained results from the point of view of their interrelations and in the context of hygienic regulations. All the theoretical backgrounds of each field are assigned to the measurement methodology and appropriate measuring technique, selected according to information from available sources. Appropriate instruments, landscape location, measurements were made, the results were evaluated and interpreted. The result is graphical output in the QGIS geographic information system.
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Analysis of technical specifications and possibilities of therapeutic X-Ray systems for non-tumour therapies
Pospíšil, Milan ; Králík, Martin (referee) ; Mézl, Martin (advisor)
This thesis deals with the use of X-rays for non-tumor therapy. It describes the formation of X-rays, their effects on the human organism and its protection. It also summarizes what diseases can be treated with irradiation and on what principle treatment is based. A part of the work is the design of the transportable X-ray station. This station is, in the next chapter, compared with the x-ray workplace in Masaryk Memorial Cancer Institute with 10 years of experience. In the next part I deal with a measuring of X-ray absorption with various materials, and a description of the calibration of X-ray systems.
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Sleep scoring using artificial neural networks
Vašíčková, Zuzana ; Mézl, Martin (referee) ; Králík, Martin (advisor)
Hlavným cieľom semestrálnej práce je vytvorenie umelej neurónovej siete, ktorá bude schopná roztriediť spánok do spánkových epoch. Na začiatku je uvedené zhrnutie informácií o spánku a spánkových epochách. V ďalších kapitolách sa nachádza dôkladnejší prehľad metod na spracovávanie signálov a na klasifikáciu. Po zhrnutí teoretických znalostí potrebných na uskutočnenie praktickej časti práce boli na základe tohto rozboru vypočítané zo signálov potrebné znaky. Tieto znaky boli podrobené štatistickej analýze a na jej základe boli vybrané niektoré znaky, ktoré boli vhodné ako vstup do neurónovej siete, ktorá je po naučení schopná triediť spánkové epochy do príslušných fáz.
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Multichannel EMG signal processing for gesture recognition
Brázdil, Štěpán ; Králík, Martin (referee) ; Harabiš, Vratislav (advisor)
This work deals with the complex solution of the problem concerning the design and implementation of the system for the collection, classification and visualization of EMG signal. The thesis is designed with respect to possible future applications like implementation of a real limb model controlled by the proposed system. In the introductory part the theoretical knowledge of EMG signal generation and sensing possibilities, including the anatomical structure of the upper limb, are revealed. In the other parts, the possible realization of measurements using the BITalino system and the use of data processing and classification using the Matlab program are discussed. The output of this work is a functional program code that allows visualization of upper limb gestures in the graphical user interface.
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Biometry of iris
Váca, Ondřej ; Králík, Martin (referee) ; Mézl, Martin (advisor)
The Bachelor´s thesis introduces readers to the general issue of biometric systems, which are devices that enable automated recognition of people based on their appearance or behavior. In the next part, the thesis deals in detail with iris biometry. Using the RapsBerry PI device, a system for acquiring iris images was designed. The last part of the thesis deals with the testing of the built equipment in order to ensure the best properties of the acquired pictures.
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Deploying thin clients and terminal servers in various environments that differ in requirements for load and performance
Králík, Martin ; Lattenberg, Ivo (referee) ; Kouřil, Jiří (advisor)
The thesis deals with possibilities of the use of terminal servers and available virtualization technologies on Microsoft, Vmware and Citrix platforms.In the first part, technical principles for virtualization are analyzed in detail and contributions to individual technologies are compared.The second part is practically aimed and deals with the suggestion of testing methodology.The testing methodology consists of identification of key factors describing user´s behaviour, which are subsequently used for selection and dimensioning of hardware architecture.The testing methodology is transformed into a scripting language and prepared for automated tests.The realized tests can be divided into groups dealing with sever load performance, monitoring data transfer, and mapping of the system time response to user´s stimulation.Thin and software clients are computed on the clients side.Performance characterizations of RDP and PcoIP protocols are monitored and compared here. On the basis of the results of performed tests two case studies for computing thin clients in the environment of The Department of Telecommunications,Brno university of Technology and in a basic school are elaborated. The first case study intended for The Department of Telecommunications is concerned with computing of VMware View technology for 150 clients. The second one supposes to compute Microsoft Remote Desktop Services in the system enviroment of a basic school for 15 clients.
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