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Laboratory railway model control
Šimík, Vladislav ; Chovanec, Jan (referee) ; Zezulka, František (advisor)
This work deals with possibilities of operating signals under the power supply voltage and using of this technology in guidance of a model of railway. Firstly there is an analysis of analogous and digital guidance of the model of railway. There is also a description of theory of three kinds of used modulations such as ASK, FSK and OFDM modulation. There are described only principles of those modulations because the problematic of the modulation is going to be solved by integrated circuit. The next part of this work is going to deal with a market research and with description integrated circuits, which ensure the modulation of operating signals of power supply voltage. There is also going to be noticed a description of others circuits that are needed for the correct function of the whole furnishing. Then I will continue with a project of scheme and single PCB for a guidance of the model of the railway. The last part of this work is concerned with activation and a proof of those proposed linkage.
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Feasibility Study of Project
Šimko, Vladimír ; Chovanec, Ján (referee) ; Koleňák, Jiří (advisor)
The Master’s Thesis deals with project management issues in the field of energetic, specifically diversification of fuel base with usage of renewable resources. The thesis is divided into two parts, from which the first part is focused on theoretical background of project, project management and feasibility study issues. In the second part particular feasibility study is elaborated. The goal of this thesis is to create feasibility study, which is one of the requested appendixes of grant application.
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Control system for the hardening furnace
Chovanec, Jozef ; Malounek, Petr (referee) ; Mikšánek, Vojtěch (advisor)
Subject of this work is to create control system for abyssal hardening furnace and project regulation of temperature. The function and construction of furnace is introduced. Next there are compared currently installed control system B&R 2005 and designed system B&R X20. Part of the work is economic analysis . Temperature in the furnace is controlled by algorithm, which should accurately follow given temperature curve in each of six section in process of heating workpiece.
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Motivation and Stabilization of Key Employees in Ceska zbrojovka a.s.
Pospíšilová, Klára ; Chovanec, Josef (referee) ; Rašticová, Martina (advisor)
This master thesis focuses on the problem of motivation, stimulation and stabilization of the key employees in the company Česká zbrojovka a.s. The main aim of this thesis is to identify insufficiencies in the current system of employee motivation and to suggest potential changes leading to its improvement and assessment from the economic impact of the proposed improvements to the company. The theoretical part of the thesis contains the fundamental knowledge and base of the human resources management and also discusses various theories of work motivation. Reviewed problems of demotivation and unwanted employee turnover follow. The practical part of the thesis shows a qualitative analysis of the current system of the staff motivation in Česká zbrojovka a.s. There is also linked and combined theoretical knowledge with the corporate practice. The final part of the thesis is based on facts found from the survey which identifies imperfections in the existing system and formulates potential recommendations for improving employee motivation and stabilization in the analysed company in order to improve work performance, enhance job satisfaction and loyalty of employees to Česká zbrojovka a.s.
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Weather measurement
Chovanec, Jan ; Havránek, Zdeněk (referee) ; Bejček, Ludvík (advisor)
The achievement of this thesis is to design functional equipment which is able to measure the basic meteorological variables as air temperature, humidity and barometric pressure. In order to measure relative humidity completed with temperature, an intelligent sensor manufactured by Intersema Inc., MS5534B, was chosen. Relative humidity is measured by a capacitance sensor Humirel HS1101LF. The measured data are stored in anon-volatile memory. Data can be downloaded to a computer file via serial port or they can be online displayed on the computer screen via the wireless Bluetooth connection. Because the equipment is supposed to be used for the external measurement without the connection to electricity, low power consumption was considered as a most important parameter as well as good weather protection.
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Multiparametric segmentation of MR images
Chovanec, Ján ; Šmirg, Ondřej (referee) ; Dvořák, Pavel (advisor)
The aim of the thesis was familiarity of segmentation methods for automatic segmentation of MR images, using multiparametrical display. The theoretical part focuses on the description of methods of segmentation techniques. In the practical part are implemented K-means and level-set method. The methods are tested on the images of the brain obtained by different sequences (T1, T1c, T2, FLAIR). Segmentation methods are implemented in the program MATLAB. Implemented segmentation accuracy is demonstrated on data which there are reports reference results. Evaluation methods is performed using different classifiers decision. The K-means method is tested different metrics and different combinations of the input image. Finally, both methods are compared with one another and visually evaluated against the reference image.
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MR imaging of somatic embryos
Chovanec, Ján ; Kubásek, Radek (referee) ; Bartušek, Karel (advisor)
The aim of this bachelor thesis is measuring of tissue cultures of spruce MR imaging methods. Was measured set of samples, where was found contain of cluster in each cuts. To obtain the image, the magnetic resonance was used, specifically spin echo sequence. Method called spin echo is based on two pulses 90° and 180°. Selected method from the beginning of the work is than used to measure the diffusion and processing of cultures. In last part the work is devoted to data processing in Matlab and Marevisi.
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Administrative building in Prague, solution of the technological stage of cladding
Chovanec, Jan ; Nečasová, Barbora (referee) ; Diaz, Yvetta (advisor)
The subject of this bachelor's thesis is the processing of the technological phase of cladding an administrative building in Prague. The lightweight external envelope consists of an aluminum modular facade and an entrance from a load-bearing steel column-grid facade. The thesis includes a technical report focusing on the cladding, the resolution of broader transportation relationships, technological regulations for the modular facade and column-grid facade, construction organization solutions, a quality control and testing plan. Furthermore, a proposal for the machinery assembly, a timeline, a detailed budget including a statement of quantities, occupational safety, and health protection, a construction site equipment design, coordination situations, and a modular facade installation procedure diagram are developed.
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The significance of ovarian cancer cell chemosensitivity testing.
Řezáč, Adam ; Tošner, Jindřich (advisor) ; Novotný, Zdeněk (referee) ; Chovanec, Josef (referee)
Ovarian cancer is a leading cause of death from gynecologic malignancies. Most ovarian carcinomas are diagnosed in an advanced stage. Surgical treatment promotes a high response rate combined with chemotherapy. However, two-thirds of patients experience a relapse, followed by a development of chemoresistance, and, subsequently, death. The biological diversity of individual types of ovarian carcinoma is so varied, that a single treatment regimen can not be considered as a fitting treatment for all patients. Various studies focus on the individualisation of cancer treatment. This study targets the in vitro sensitivity testing in ovarian carcinoma cells on cytostatics using the MTT test. We presume that this method could be utilised in clinical decision-making process. Between the years 2006 and 2010, we have acquired tumor tissue and malignant ascites from a total of 55 patients enrolled in our study and analyzed those samples in vitro for chemosensitivity / chemoresistance using the MTT test. The aim of this research work was to asses chemosensitivity of ovarian carcinoma cells and compare these results with clinical parameters. Carcinoma cells displayed in vitro chemosensitivity to cisplatin in 67% of patients. Tumor cells of 22% patients proved to be sensitive to carboplatin and 16% to paclitaxel....
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The letters from prison by Milan Šimečka
Chovanec, Ján ; Chmel, Rudolf (advisor) ; Pátková, Jana (referee)
Bachelor's thesis: The letters from prison by Milan Šimečka Abstract in English language After nine years form dead of Milan Simecka (1930 - 1990), political philosopher, dissident and thinker from Czechoslovakia, was published (thanks for Slovak Foundation of Milan Simecka) his letters form prison in book named Dopisy z vězení / Listy z väzenia (The letters from prison). This letters he sent from prison, where he spend almost one year - from 6. 5. 1981 to 27. 5. 1981. In my bachelor's thesis, I tried to put Simecka's correspondence to the context of dissent in Czechoslovakia before 1989 and the revolution in the same year. Also, I tried to put this correspondence to the context of his own work, life and his philosophical heritage. Ján Chovanec
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