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Portable digitally controlled stabilized source of symmetrical voltage
Hynek, David ; Drexler, Petr (referee) ; Mikulka, Jan (advisor)
This thesis deals with a design of a power supply for a measuring equipment for a geophysical mapping intended to do a reconstruction of an electrical impedance of a ground environment of water reservoirs. The power source is going to be used for laboratory measurements and for outdoor experiments. The thesis describes the selection of suitable components, equipment design and testing. The theoretical part explains the functions of used components and the principle of an electrical impedance tomography. The conclusion summarizes the properties of the proposed solution and evaluates the final product.
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DESIGN OF FIBER-OPTIC BIOSENSOR WITH NEAR-INFRARED SPECTRAL ANALYSIS
Křepelka, Pavel ; Jakubec,, Martin (referee) ; Skládal, Petr (referee) ; Mikulka, Jan (advisor)
This thesis deals with a measurement and interpretation of NIR spectra of bacterial cells and design of biosensor using this analytical technique. In the first chapter, there is introduction of current state of knowledge in the field of NIR spectroscopy in microbiology and technology of fiber optic biosensors. The summary of this chapter shows that NIR is a suitable technique for direct molecular analysis of bacteria, but it suffers from low sensitivity and insufficient interpretation of bacterial spectra. In the next part of the thesis, there is a theoretical background of spectral analysis techniques and technology of fiber optic sensors. In the practical part of this work, there is suggested the elimination of disadvantages of NIR spectroscopy in microbiology by a series of experiments used for interpretation of NIR spectra of bacteria and design of fiber optic sensor to increase sensitivity of this technique. In this work, spectral regions important for the identification of bacterial strains were determined and partially interpreted and the sensor for bacterial analysis capable of classifying strains based on 105 captured cells was designed. Therefore, the objectives of this work were fulfilled.
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Laser source with fiber-optic output
Roupec, Tomáš ; Mikulka, Jan (referee) ; Drexler, Petr (advisor)
This term project deals with the semiconductor laser components, and how it works. Additionally, there is an optical fiber ant networking with laser. It is written of power and cooling laser diodes and such information suggested the possible involvement of the laser diode. At the end of this work is designed laser´s exciter with charging and adjacent circuits.
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A laboratory task to verify the properties of audio devices
Staňková, Karolína ; Marcoň, Petr (referee) ; Mikulka, Jan (advisor)
The aim of this thesis is familiarization with the parameters of an audio device and their measurements according to the standards (AES17-2018 and ČSN EN 60268-3). A laboratory task for the Measurement in Audio Engineering course is designed, based on the study of the standards. The first part of the thesis deals with detailed analysis of the measurements of different parameters of audio device. The described procedures are consequently employed to design the laboratory task. The second part of this thesis is dedicated to design the laboratory task. The automatized system based on HP VEE platform was developed to provide the multiple measurement. The attachments of this thesis contain the student’s manual for the laboratory task, the sample protocol, the testing measurement manual and the sample protocol for the testing measurement.
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Detection algorithms of moving objects
Novotný, Josef ; Mikulka, Jan (referee) ; Marcoň, Petr (advisor)
This work deals with detection methods of moving objects. This thesis contains a research of available solutions for further implementation on the Raspberry Pi using the OpenCV library. The aim of the thesis is to realize a module that is capable of detecting and recognizing moving objects in the sky. Required objects can be detected in static or dynamic mode. In the theoretical part of the thesis are methods divided into motion detection, object detection and object recognition. In the practical part were for detection of undesired objects selected a background subtraction method and the localization of significant ORB points. Haar feature-based cascade classifiers was for recognition of learned objects chosen. In the practical part, methods were of computational difficulty and detection success tested. The result is an automatic detection device that allows to watch and distinguish unwanted objects in the sky.
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THD Analyzer
Ha, Tuan ; Drexler, Petr (referee) ; Mikulka, Jan (advisor)
This thesis deals with design of a THD analyzer for audio frequency. In the interduction, there is a description of methods of THD calculation and realization of THD analyzer. Suitable computing platform must be chosen with capability to process audio data. The expansion board is designed for audio acquisition. Part of this design is complete program that is capable of displaying spectrum and computing THD.
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Laser source with fiber-optic output
Roupec, Tomáš ; Mikulka, Jan (referee) ; Drexler, Petr (advisor)
This term project deals with the semiconductor laser components, and how it works. Additionally, there is an optical fiber ant networking with laser. It is written of power and cooling laser diodes and such information suggested the possible involvement of the laser diode. At the end of this work is designed laser´s exciter with charging and adjacent circuits.
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Persuasive Communication of Food Companies in Educative Sphere
Mikulka, Jan ; Klabíková Rábová, Tereza (advisor) ; Klimeš, David (referee)
This bachelor thesis Persuasive Communication of Food Companies in Educative Sphere presents communication activities, which food companies exert on students of culinary schools, the future professionals of gastronomy. The aim is to describe persuasive techniques, which food companies use to influence students. The project contains descriptive analysis of language form used in commercials in textbooks for students. The issue of commercials in textbook is also included and described in general. The project contains statement of a Ministry of Education, Youth and Sports employee, author of one of the textbooks, and professional chefs.
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A System for Eye Movement Tracking
Urbanová, Lucie ; Marcoň, Petr (referee) ; Mikulka, Jan (advisor)
V této bakalářské práci jsou diskutovány možnosti a aplikace systému pro sledování pohybu očí, obsahující i aktuálně na trhu používané produkty. Práce následně uvádí řešení takového systému. Obsahuje návrh a realizaci držáku pro pevné uchycení kamery. Práce obsahuje i realizaci softvéru vytvořeného v C/C++ za využití Visual Studia a knihoven OpenCV. Tato aplikace sestává z procesů detekce očí, testování a vyhodnocení. Jako součást práce je provedeno a vyhodnoceno testování vytvořeného systému. Práce rovněž posuzuje vlastnosti systému a nabízí připadná rozšíření.
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