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Design and implementation of an obstacle avoidance method in an outdoor environment for a mobile robot
Fargač, Tomáš ; Králík, Jan (referee) ; Věchet, Stanislav (advisor)
This thesis focuses on investigating the usability of the optical flow method in image processing. Firstly, this method is introduced theoretically, followed by its mathematical derivation. Subsequently, the idea of implementing it into decision-making algorithms and potential areas of application is presented. The thesis also elaborates on suitable environments for such applications in both virtual and real worlds. The practical part demonstrates the step-by-step development process and the refinement of working with this method and its outputs. The work utilizes the Matlab programming environment and detailed work at the level of individual components in this programming language, enriched with auxiliary toolboxes, especially from the field of computer vision. The entire research is summarized clearly at the end, and all undertaken steps are depicted in a flowchart. Finally, all explored approaches with their strengths and weaknesses, identified throughout the process, are clearly presented.
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Icing on radiator used for heat pump for EV vehicles
Ostroukhov, Andrei ; Růžička, Marek (referee) ; Bazala, Jiří (advisor)
Tato práce je zaměřena na vliv kondenzace na přenos tepla chladičem elektromobilů. Teoretická část popisuje princip systému tepelného čerpadla a obsahuje také popis přenosu tepla v radiátoru a kondenzace na jeho povrchu. Práce popisuje řešení pro snížení množství kondenzátu, byly demonstrovány různé metody. Byl také popsán proces vzniku námrazy, tvorby ledu na povrchu výměníku tepla a také byli popsané mechanická poškození způsobené námrazou. V praktické části bude použit simulační software pro porovnání množství kondenzátu, který se objeví na povrchu výměníku tepla při použití některých níže popsaných metod. Simulace také určí závislost tepelného toku na množství kondenzátu.
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Localized oxidation of vanadium films accompanied by in-situ analysis
Spousta, Jiří ; Neuman, Jan (referee) ; Ligmajer, Filip (advisor)
V předložené diplomové práci se zabýváme popisem a aplikací námi vyvinuté metody lokální oxidace vanadových vrstev v komoře elektronového mikroskopu. K tomuto účelu používáme duté optické vlákno, které na zvolené místo na povrchu vzorku může přivést jak pracovní plyn (O\2), tak i intenzivní laserové světlo ($\lambda=532$\,nm). Po několika iteracích hledání nejvhodnější konfigurace lokálního ovlivňování povrchu vanadu (jednovláknová, případně dvouvláknová verze metody) byla jako nejvhodnější vyhodnocena varianta, ve které bylo planární duté optické vlákno (připevněné k ladičce AFM mikroskopu LiteScope od firmy NenoVision) definovaným způsobem přiblíženo k povrchu vanadové vrstvy. Blízkost povrchu a dostatečný tok pracovního plynu kapilárami dutého vlákna vedly k tomu, že se nám vanadovou vrstvu úspěšně podařilo zoxidovat. V práci jsou rovněž popsány výsledky měření Ramanovy spektroskopie takto lokálně ovlivněných vanadových vrstev, které ukázaly, že zvolená metoda, kterou jsme objevili, byla úspěšná a otevírá nové možnosti přípravy tohoto zajímavého materiálu. V práci jsou rovněž uvedeny a popsány nezbytné konstrukční úpravy stávající experimentální sestavy pro lokální oxidaci (multifunkčního systému vstřikování plynu) a popis přípravy tenkých vanadových vrstev metodou IBAD
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Analysis of boundary conditions of biomechanical models of the lumbar spine
Kocián, Ondřej ; Kovář, Jaroslav (referee) ; Vosynek, Petr (advisor)
The bachelor thesis deals with a research study of biomechanical models of the lumbar spine. After a brief anatomical introduction, this thesis describes the process of building computational models for finite element analysis and what material properties of individual tissues are usually reported in the analyses. Subsequently, boundary conditions, i.e. more precisely, constraints and different types of loading and their influence on the model behaviour are described in order to provide the most accurate interpretation with respect to the actual behaviour of the lumbar spine. The most accurate method of loading the spine appears to be the introduction of a force flow through the instantaneous centres of rotation of each vertebra, based on a research study. In the last section, an experimental attempt is carried out on a computational model with a single loading force changing its location in order to better interpret the positions of the instantaneous centres of rotation. This method can sufficiently approximate the force states in the contact surfaces. However, it needs to be experimentally verified.
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Revitalisation of a water channel
Voženílek, Vojtěch ; Havlíček, Tomáš (referee) ; Paseka, Stanislav (advisor)
The thesis deals with the proposal of improving the current condition of the Biskupice stream and its floodplain. The thesis is divided into theoretical and practical parts. The aim of the practical part is to get acquainted with the issues of watercourse revitalization and then transfer this knowledge into the design. The practical part focuses on a specific section of the Biskupice stream. It describes the site, includes hydraulic calculations in the HEC-RAS program, where the existing channel was first assessed and then the proposed one. Space is also devoted to the design of the pool system and accompanying vegetation. The work also includes drawing documentation.
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Analýza malware na úrovni síťových toků
Brázda, Šimon ; Setinský, Jiří (referee) ; Poliakov, Daniel (advisor)
This thesis explores freely available datasets and investigates their applicability to training machine learning models. The ipfixprobe tool was used to extract data from the dataset and the Python language was used for further implementation. In the theoretical part, basic application protocols, network monitoring capabilities at the flow level are discussed. Furthermore, different types of malware and types of machine learning models applicable to network flow classification were discussed. Subsequently, these models were used to test the applicability of the selected dataset, which was thus validated.
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Mathematical Methods in Economics
Tsybulevskyi, Oleksandr ; Michalíková, Eva (referee) ; Bobalová, Martina (advisor)
The bachelor‘s thesis is focused on the proposal of a concrete model for improving the financial status of the company using mathematical methods. The proposal is based on the practical application by selected mathematical methods. The thesis is divided into three parts: theoretical, analytical and porposal. The theoretical part is devoted to a general and non-standard approach to the use of mathematics in economics. Analytical gives an analysis of the current situation in firm and applies the selected theory in the selected business entity. The porposal part contains a proposal for an optimization model of inventory consumption and, as a result, the possibility of saving and increasing the company's solvency and recommendations for equipment renewal.
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Generating non-standard packets and data flows on Ethernet networks for teaching purposes
Mošnerová, Tereza ; Dvořák, Jan (referee) ; Jeřábek, Jan (advisor)
This diploma thesis is aimed at the process of generating non-standard data streams that contain hidden information. For this purpose a software called Ostinato is used. Ostinato allows to select protocols on the individual layers of the TCP/IP network model according to the needs and preferences, and moreover, data bytes can be inserted and modified arbitrarily using the HexDump fields. Various fields of the TCP/IP protocols are used to hide data on the network, transport and application layers. The generated data packets can be easily modified which enables to create several other versions of them. These can serve, for example, as a semestral project assignment for the subjects Communication Technology and Modern Communication Techniques taught at BUT. In addition, the size limits of the inserted data of the individual data packet options are tested. The functionality of the generated packets is verified by Wireshark. As a result, several .ostm and .pcapng files including a text file with their clear description are provided.
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Optimising the use of renewable energy sources by controlling home technologies
Bolf, Marek ; Mikulášek, Michal (referee) ; Jablončík, Lukáš (advisor)
Initially, this thesis is devoted to the analysis of methods of efficient energy management and the analysis of renewable energy sources. Subsequently, the thesis focuses on detailing the design of an optimization algorithm that schedules and distributes the flow of electricity in the home. The effectiveness of the algorithm has been computationally demonstrated using data collected from days in the past. This algorithm is also aimed at communicating with other devices in the home. In this paper, the algorithm is explained verbally, with diagram and calculations. Subsequently, the type of control unit has been selected.
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The puppet theater building in the center of Opava
Solmošiová, Sára ; Štěpán, Marek (referee) ; Sládeček, Svatopluk (advisor)
The building of the theater is not currently a stable structure; it changes based on current demands. From the beginning, I have worked with the idea of a new space for today's theater scene, not only for the specifics of puppet theater. The intention of the design is to create a space for theater professionals according to their needs, while not neglecting the aesthetics of visual and architectural requirements beyond the lapidary construction. Verticality allows for an efficient workflow. The mass of the theater building stemmed from the design of the performance space.
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