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Tilt sensors
Hájek, Tomáš ; Caha, Luděk (referee) ; Beneš, Petr (advisor)
The topic of the Bachelor's thesis are MEMS sensors of inclination, which find their use inside integrated circuits, equipment of aerospace and automobile industry, but also in ordinary electrical appliance. The work serves the reader to build a grasp over production, usage, basic principles. Finally, it offers an overview of sensors to ease the orientation on the market. The design of the physical model, which can be used to prevent the sensor from apperance of mathematical errors, is tested in the practical part.
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Analysis of uncertainties in the calculation of residual stresses
Dubravec, Kristián ; Houfek, Lubomír (referee) ; Návrat, Tomáš (advisor)
This thesis is about analysis of uncertainties in the calculation of residual stresses, which are homogeneous and measured by the hole-drilling method. Stochastic approach is explained using models of beams. Theory of residual stresses is included. Source code for evaluating residual stresses deterministically and stochastically is created using the Python language. Sensitivity analysis of input parameters is performed.
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Qualitative comparison of MEMS vibration sensors
Hasík, Stanislav ; Havránek, Zdeněk (referee) ; Klusáček, Stanislav (advisor)
The aim of this bachelor thesis is a qualitative parameter validation of MEMS vibration sensors using calibration devices from the companies SPECTRA a Brüel & Kjr. First part of study deals with different types of MEMS vibration sensors on the piezoresistive, capacitive and thermal principle of operation. The study also deals with primary and secondary methods of calibration of vibration sensors and devices used for these calibration methods. The second part of the thesis is to use the calibration chains and secondary calibration methods to verify the sensitivity and temperature dependences of three particular MEMS accelerometers from the companies STMicroelectronic, MEMSIC and Panasonic. The measured characteristics are compared with catalog datasheets. In the end of the thesis are also discussed the possibility of the suppression these temperature effects.
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Social Games in Early Mother-Infant Interaction
Hrivíková, Zuzana ; Horáková Hoskovcová, Simona (advisor) ; Šulová, Lenka (referee)
The goal of this thesis was to study early social games in natural interaction between mother and child of 4 month age. Infant's affectivity and gaze orientation as a sign of participation was coded. We also observed how can mother and infant influence the social game routine. We examined mother's warm sensitivity and infant's temperament as a variables potentiallz influenced the social game interaction. Fifty five dyads participated in the present study when infants were four months old. Social games were analyzed in natural mother-infant interaction and identified on the given criterions. To assess maternal warm sensivity Materna Affect Attunement was used. Mother's evaluated infant's temperament on fourteen scales of IBQ-R. The results indicate that social games are an inherent part of mother-infant interactions in infant's 4 months of age, and their occurance is influenced by temperament. Keywords: play, game, social game routine, structure, social interaction, infant's positive affect infant age, sensitivity, temperament
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Classification and modelling of LED light sources in terms of sensitivity to supply voltage fluctuations
Hudáč, Tomáš ; Kukačka, Leoš (referee) ; Drápela, Jiří (advisor)
Cieľom tejto práce je preskúmať a charakterizovať celkovú odolnosť voči flickru v LED svetelných zdrojoch dostupných na súčasnom trhu, a vytvoriť modelu LED svetelného zdroja. Na nájdenie reprezentatívnych vzoriek LED svetelných zdrojov, bola prevedená analýza online trhu, ktorá ukazuje najpredávanejšie typy. Na základe výsledkov z analýzy sa získalo 31 vzoriek. S rôznymi LED technológiami a rôznymi možnosťami regulácie výkonu, napríklad bezdrôtovo alebo triakom. Vykonaním meraní za ideálnych podmienok napájania a rozobraním niektorých vzoriek boli celkovo identifikované 4 hlavné triedy s rôznymi topológiami napájacích obvodov. Ďalej sa vykonali testy ich citlivosti na blikanie a imunitou voči blikaniu. Na základe získaných výsledkov testov bola každá topológia ovládača ohodnotená podľa jej celkovej odolnosti voči blikaniu. V závere práce bol navrhnutý model v Simulinku, ktorý úspešne simuloval IH GF krivky v porovnaní s nameranými hodnotami
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Scoring system for sputum evaluation assessing specificity and sensitivity
Fidra, Dominika ; Trnková, Ivana (advisor) ; Maláska, Jan (referee)
The aim of this diploma thesis is to create a scoring system in sputum evaluation for general nurses in the intensive care unit. It is conceived as a diagnostic study that assesses the ability of the scoring system to accurately determine the ongoing condition - an infectious inflammatory disease. The collected biological material was compared with the gold standard - microbiology, by two independent persons. The result of the diagnostic study is a verified scoring system, where the color, consistency, admixtures and odor of the biological material of sputum are described for individual point evaluations. The main parameters of the diagnostic test - sensitivity, specificity and predictive value (positive and negative) - were used to verify the scoring system. For normal and pathological values, cut-off values were determined, according to which the value of sensitivity and specificity changed. By plotting the values on a graph and creating a ROC curve, it was found that with a cut off value of 1 and 2 for the first evaluator, the resulting area under the curve (AUC)=0.75. The result represents the scoring system according to the first evaluator as a good and effective test. The research was carried out at the anesthesiology and resuscitation clinic at the University Hospital of Kralovske Vinohrady...
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Electronic temperature measurement for a grill
Svoboda, David ; Burian, František (referee) ; Fiedler, Petr (advisor)
The work deals with methods of temperature measurement, electrical and non-electrical. Discussing the advantages and disadvantages of electrical methods of temperature measurement for applicability in the grill. It also discusses the selection of a suitable sensor to measure the temperature inside the grill. Subsequent design and implementation of the measuring system where the emphasis is on accuracy.
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Design and verification of a thermodynamic sensor with a focus on high sensitivity
Staroštík, Petr ; Jankovský, Jaroslav (referee) ; Otáhal, Alexandr (advisor)
This work deals with the issue of using bolometers, calorimeters a thermo-dynamic sensor in measuring temperature and heat. In the case of bolometers and microcalorimeters are described their properties and limit parameters. The work focuses more closely on the construction of a thermodynamic sensor from discrete components with a focus on achieving high sensitivity. The sensitivity of the thermodynamic sensor was measured in an experiment with a defined heat change and evaluated. Using this experiment was set the measurement methodology, which was subsequently modified. As part of the bachelor's thesis was designed a new sensor for a thermodynamic sensor and was measured its sensitivity.
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Image fusion within prostate biopsy
ŽŮČEK, David
This study deals with the use of image fusion within prostate biopsy, which is a method used for several decades, which serves to accurately capture pathological findings in the prostate, primarily prostate cancer. The combination of imaging modalities, which are magnetic resonance and intracavitary ultrasonography, is used to guide the biopsy. The aim of the study was to study the unusual situation where one and the same radiological team performs both procedures at the same time. Procedures from which the prostate biopsy methodology guided by image fusion is formed. Subsequently, we established a hypothesis that specific benefits can be found when the same doctor and radiology assistant perform both procedures. Procedures which consists of image fusion of magnetic resonance imaging and intracavitary ultrasonography, which guide the prostate biopsy of the same patient. The methodology of the theoretical part was the study of mostly foreign professional medical articles and literature and the subsequent use of the information to clarify the described method. In the practical part, the output data of physical examination of 59 patients were processed with the use of ROC analysis and then compared with two foreign studies to verify the established hypothesis. The data were provided by Mr. MUDr. Zdeněk Chudáček Ph.D. The results of the ROC analysis and its comparison with foreign studies confirmed the hypothesis, and therefore the presence of specific advantages of the studied unusual situation of performing a prostate biopsy in the way determined at the beginning of this study. The results of this study will be used in a broader journal publication, which aims to bring the issue of this study to the professional radiological public.
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