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City Traffic Simulator
Dostál, Martin ; Dalecký, Štěpán (referee) ; Rozman, Jaroslav (advisor)
This thesis is focused on microsimulation of city traffic, specifically a small city circuit in Brno. The thesis describes approaches for solving the problem of road network representation and presents basic methods and models needed for traffic simulation on the level of individual vehicles control as well as on the level of simulator control. In the case of more possible solutions to the given problem, the features and suitability of these solutions are compared. In the practical part of the thesis, the structure of the proposed simulator is presented with all the dependencies among individual submodels, along with the description of implementation details related to the individual parts.
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Dimensioning of Overhead Line Conductors According to ČSN EN 50341 and ČSN EN 50423
Dostál, Martin ; Novotný, Jan (referee) ; Orságová, Jaroslava (advisor)
Overhead line must be designed to be able to resist variety of influences. These influences are mechanical, which are caused by wind and rime during the normal conditions and electrical influences. Therefore all parts of overhead line have to be designed and built to withstand mechanical and electrical stress. This bachelor’s thesis is focused mainly on electrical parameters of overhead line, climatic stress and calculation of mechanical stress during limit states. There are described formulas and steps of calculation of line straining MV and HV and there are also described examples of calculation in detail.
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Hiding Moving Objects in Video Sequences
Dostál, Martin ; Zahrádka, Jiří (referee) ; Španěl, Michal (advisor)
Hiding moving objects in video sequences is an interesting topic in computer vision. In this thesis, a real-time single object tracking and removal method is proposed. An input video is assumed to be captured with static video camera. Motion detection is based on a background subtraction using Mixture of Gaussians as the representation of background. The object tracking is realized by a combination of blobs comparison and computation of optical flow using Lucas-Kanade method. Consequent object removal makes use of created background model.
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Wavelet Transform in Image Processing
Dostál, Martin ; Klíma, Ondřej (referee) ; Bařina, David (advisor)
The wavelet transform has been used for several decades and it is still an object of research - especially its recent modifications which are using the so-called second generation wavelets. It has several advantages over other integral transformations. The most important of them are the ability to localize both in time and frequency and an ability to decorrelate some real non-stationary signals such as images. For this reasons, the wavelet transform became an often used tool in many image processing tasks, for example in image compression, edge detection or contrast enhancement. In this thesis, the wavelet transform is explained, including the theoretical foundation and implementation for use with two-dimensional discrete signals. Some of the applications of the wavelet transform are presented and described. The wavelet transform showed to be suitable tool for edge detection, noise reduction, contrast enhancement and HDR compression.
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Rationalization of production technology body
Dostál, Martin ; Chladil, Josef (referee) ; Osička, Karel (advisor)
In the introductory part of the thesis, there is a description of machining technologies used in the production of body. This is followed by a detailed analyse of the current technology of production of this component with an emphasis on finding its problematic parts, including a proposal of the options of the rationalization. After the methods of rationalization assesment, a new technological process was developed and the alternative tools were proposed. Considerable time and money savings were achieved by this rationalization. In the discussion section, there were designed some options of solving problems arising during the installation of this rationalization into working.
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Diagnosis of mechanical vibrations in asynchronous motor origin
Dostál, Martin ; Dostál, Lukáš (referee) ; Janda, Marcel (advisor)
Every machine needs to be maintained and controlled, if may work reliably during they service life. Big part of service life of expensive machines are those machines in operation. Vibration diagnostics is type of analysis, that doesn’t need removal of rotation machinery. The vibration, that are created by running machinery, are used as source of information about mode of operation. This master’s thesis contains theoretical analysis of vibration diagnostics and vibration measurements of a particular machine. This thesis contains 3D models of bearings and rotor asynchronous machine, which are created by software Autodesk Inventor 2014. Bearings vibration analysis of this models is performed by software Ansys Workbench.
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The Code
Pavlacký, Tomáš ; Dostál, Martin (referee) ; Gabriel, Michal (advisor)
A series of four sculptures, which stemmed from the glitchových approaches in the creation of a 3D program. The work is based on a 3D vyzualitě glitches (as a transmission error information). As an essential element for deformation were used small sculptures that have been scanned.
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Skiascopic and skiagraphic examination of the spine with a focus on scoliosis
DOSTÁL, Martin
The spine is the body's support system and a supporting pole to the whole skeleton, therefore it is important to take good care of it to prevent its deformities, such as scoliosis. Scoliosis is a serious illness which can appear at a really young age. Nowadays, it's timely detection and early treatment is achieved through not only expert orthopaedic check-up, but mainly through radiological examination, mostly skiagraphy. In my bachelor thesis named "Skiascopic and skiagraphic examination of the spine with a focus on scoliosis" I deal with skiagraphic and fluoroscopic options of examining the spine, the issues of scoliosis in general and with specific statistical analysis of incidents of scoliotic changes recorded at the Radiological clinic of the University hospital Brno, at the department of adult medicine. In the introduction, I explain the basic anatomy of the spine including the movement possibilities of individual spinal parts, such as tilting or rotation. The differences between cervical, thoracic and lumbar part of the spine, and their individual vertebrae, are described. In the next part, I focus on the basic principles of skiagraphy and fluoroscopy. It's important to realise what these examination techniques involve, how they work and why are they indispensable parts of examination process of scoliosis. The origin of x-rays and its types are explicated. I also devote a little subchapter to digitalisation, because in modern medicine, it's gradually replacing original technology of recording on film screens, and its use requires minor adjustements of the skiagraphy procedure. The third part of the bachelor thesis focuses on individual skiascopic and skiagraphic examinations of the spine. I describe procedures of skiagraphy of the cervical, thoracic and lumbar part of the spine including the projection of the sacrum. I mention special skiagraphic methods performed in the process of intentional detection or observation of scoliotic changes, including telemetric pictures composed into the long format. From the skiscopic examinations, I marginally chose myelography and discography, application of which is currently almost none thanks to modern examination methods such as computed tomography and magnetic resonance imaging. In the next chapter, I'm finnaly dealing with the topic of scoliosis itself. The basic classification according to aetiology is shown, I also explain the difference between idiopathic, congenial and neuromuscular scoliosis. Also, I clarify by what reference is the scoliosis' curvature measured and what terms are used to describe scoliosis. The chapter concludes by brief explanation of therapy used for scoliosis. The second part of the thesis includes my research. I present the goals of the work and anticipated hypothesis. I explain where and in what conditions the data collection took place, including description of the process of telemetrical screening at the forementioned workplace in Brno. I also present outcome achieved by statistical processing of data, including my commentary based on hypothesis and acquired experience. In the discussion, I compared incidents of scoliosis today according to my research with professional literature focused on scoliosis. Furthermore, I mentioned options of spinal issues prevention, including related illnesses. I also enclose suggestion of utilization of my work in practice, which, as I hope, will be a usefull addition to clinical research for University hospital Brno. In the last part of my dissertation, I summarize all my findings from the thesis and enclose, along with the list of used literature and internet links, attachments in the form of expertly described radiographs of scoliotical spines, which I obtained, with the consent of the staff, also ati the University hospital Brno.
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Search Engine Marketing
Filip, Viktor ; Stříteský, Václav (advisor) ; Dostál, Martin (referee)
This Bachelor's Thesis has several goals. Make a complex overview of the search engine marketing. Assess convenience of search engine optimization and pay per click systems using specific examples in practice. Next is to determine a duplicate effect in position of a website on first to third places in search engine Seznam.cz and also first or second position in pay per click system Sklik.cz. Last goal is to analyze an innovation from Sklik -- first or second website in the system has a picture preview of the website near the ad. Whole work is based on research of several internet projects in practice. In the end are evaluated all goals and benefits of this Bachelor's Thesis.
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