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Non-contact measurement and analysis of vital signs
Kolářová, Jana ; Mézl, Martin (referee) ; Odstrčilík, Jan (advisor)
The theme of this barchelor´s thesis is to process the video record of a human face to detect vital parameters - heart rate, respiratory rate were chosen. The purpose is a contactless and painless method to determine these parameters, both for the simpler gain of these data in newborns and more natural values without the influence of any subconscious fear of the devices. Or as a method of verifying work ergonomics, workplace stress, depending on the regularity of the rhythms of these parameters. The solution has been focused on testing its function and accuracy under various acquisition conditions, and has been able to reliably verify its reliability under defined scanning conditions.
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Influence of breathe to baroreceptor reflex
Humpolík, Tomáš ; Janoušek, Oto (referee) ; Kolářová, Jana (advisor)
This Master's thesis deals with the influence of breathe to baroreceptor reflex. The first chapter is focused on measuring of blood pressure, in reference to later used method. In the second part is detailed analysis and explanation of term baroreflex, relationship between frequency spectra of systolic blood pressure, heart rate and breathing, mechanisms of regulation of blood pressure and heart rate variability. Third chapter deals with possible ways, how to analyze data, which are needed for estimation of baroreflex sensitivity, analyze of heart rate variability and estimation of power spectral density. Next parts of this thesis is paid attention to technical equipment and methods of acqusition of data, using this equipmnent. Part of this work is also software application, which makes possible from the recorded data estimate baroreflex sensitivity.
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Dynamic Signal Analyzer
Grohoľ, Stanislav ; Ing. Miroslav Horáček, Ph.D., ÚPT AVČR Brno (referee) ; Zobač, Martin (advisor)
The thesis deals with the two-port transmission measurement using self-made dynamic signal analyzer (DSA) and its associated problems. The DSA is based on National Instruments data acquisition card. In this work are provides basic analysis, for which the DSA can be used. Described are methods of two-port transmission measuring. Definitions concerning the creation of the DSA are described in detail. Listed are the kinds of stimuli and parameters of data acquisition cards. The practical part describes the properties of the selected data acquisition card for DSA and utility, created in MATLAB. In practical part are verified properties of individual stimulus and referred to the comparison with theoretical properties. Selected stimulus is used in a particular two-port measurement and the results are compared with theoretical model. Experimentally is determined the size of the dynamic range of the analyzer.
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Analysis of stochastic processes in electronic components
Vlčková, Irena ; Šebesta, Vladimír (referee) ; Zajaček, Jiří (advisor)
The Bachelor Thesis deals with the interference of electronic parts, using of non-destructive analysis for electronic interference in semi-conductive parts and measured samples. The thesis is divided into thematic areas: Interference types; Spectrum of random continuous signals, Spectrum calculation due to the method of periodogram and the method sub-banding coding and following FFT, Apparatus for interference measuring, Results of interference measuring. In the practical part 5 and 6, there are measuring results of chosen electronic parts, transport and interference characteristics and they are compared with theoretical presumptions.
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Scanning a analysing of heart electrical activity and blood pressure before and after the load
Vích, Daniel ; Kolářová, Jana (referee) ; Kratochvíla, Jiří (advisor)
The aim of bachelor’s thesis is familiarization with anatomy and physiology of heart, with setting to electrical activity, scanning EKG before and after the load with Biopac system, scanning of blood pressure before and after the load with auscultation, statistical analysis of acquired data and presentation of measured data in graphical interface Guide of Matlab system. According to the protocol of measurement, scanning of heart electrical activity with the Biopac system, and scanning of blood pressure, with auscultation, was realized before and after the load. Measured data was statistically analyzed with t-test to verify hypothesis, that there is an influence of the load on the watched parameters, and to show the process of statistical verification. Application of this method assumes normal distribution of data, that’s why data was at first tested by Chi-squared and Kolmogorov-Smirnov test to verify their normal distribution. In the next step data was imported into Matlab system. The presentation of measured data is realized in graphic interface Guide. The program contains time domain and spectral analysis, automatic detection of heart rate and analysis of heart rate variability.
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Correlation analysis of optically trapped particle motion
Koudelníček, Karel ; Jákl,, Petr (referee) ; Harabiš, Vratislav (advisor)
This bachelor’s thesis deals with the description of random (Brownian) motion of microscopic particle trapped by optical trap. This thesis provides overview of possible usage in biology. The major part of the thesis is dedicated to description of methods that allow characterize optical trap with etc. stiffness thanks to the random motion. First, the estimation methods are tested on the simulated data. Before using these methods for real data, it was necessary to modify them, specifically to eliminate crosstalk and frequency noise. The differences in the estimation of the stiffness from the autocorrelation function and the power spectrum were described in the conclusion.
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Noise generator
Pospíšil, Miroslav ; Kubásek, Radek (referee) ; Fiala, Pavel (advisor)
The goal of bachelor’s thesis „Noise generator“ is circuit design and construction of noise generator. The first part is concentrated on description of random signals. There are circuits of noise generators in the second part. In the third part is example of utilization noise generator in microwave sensors. And in fourth part are designed circuit and made measurements.
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Processing of Operating Load Data for Electrodynamic Test Bench
Prouza, Jiří ; Němec, Martin (referee) ; Novotný, Pavel (advisor)
This master's thesis deals with data processing for an electrodynamic test bench. The thesis presents a theoretical overview of signal distribution, determination of fatigue damage from random vibrations and a description of test benches. The next part deals with setting up the test time reduction in GlyphWorks software. The aim of this thesis is to process and create a procedure for an accelerated fatigue test from data measured during an operational test on a polygon. The data are then verified on an electrodynamic test rig using a Skoda Auto dynamic test room. The final part of the thesis contains data evaluation and a guide explaining how to easily create a test in the relevant software.
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Analysis of long-term electrocardiograms
Vojtíšek, Jiří ; Vítek, Martin (referee) ; Kolářová, Jana (advisor)
This work deals with long-therm analysis of electrocardiogram using heart rate variability representation. Project explains heart anatomy and electrophysiology, creation and shape of ECG curve. Heart rate variability is described by power spectral density, which we obtain from created algorithm. This algorithm was used in graphic user interface application Spider Pig Analysis, which analyze long-term ECG focused on showing Power Spectral Density graph. Practicality of this program was verified in experiment. In the experiment HRV at rest and HRV at tilt were compared.
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The Applicability of the JONSWAP Spectrum for Wave Events at Small Water Surfaces
Gřegoř, Adam
Task of the research was to determine whether the spectral density (i.e. spectrum) of wind wave events at Hulínská štěrkovna reservoir is the same as the JONSWAP spectrum, which was based at the wave events at partially developed sea. Data about the time course of the water surface elevation at reservoir were processed with use of the MATLAB and WAFO toolbox that was developed by the Lund University.
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