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Experimental Car for Testing of Combustion Engines
Dubský, Jiří ; Beran, Martin (referee) ; Svída, David (advisor)
The goal of this diploma thesis is to design a frame for an experimental vehicle. The primary object is to design a conception and layot of a drive unit. The frame design is followed by a creation of a model for an analysis. The model will serve for torsional stiffness computing using FEM analysis software. After evaluation of results additional chanhges of the design may take place. A vehicle will serve for testing combustion engines of the same conception and thus it is not intended to run on public roads.
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Low energy excitations in oriented graphite by THz magneto-optical spectroscopy
Dubský, Jan ; Kunc, Jan (referee) ; Vrba, Radimír (advisor)
This master’s thesis deals with the modelling of electronic properties of graphite crystal, which are measurable using a spectrometer based on high frequency electron paramagnetic resonance (HFEPR for short) located in laboratories of CEITEC BUT. This is especially the band structure of graphite and its Landau levels. The theoretical part of the thesis describes key effects and connections from quantum mechanics and definitions of important terms from solid state physics, which are used to describe the crystalline structure of graphite and its electronic properties. Furthermore, the project describes the HFEPR spectrometer and its functional principle. In the practical part of the thesis, there are numerical models of the band structure of graphite and of its Landau levels and description of the preparation of a graphite sample for measurement. At the end of the practical part there is the analysis of measurements results, namely the cyclotron resonance and Shubnikov-de Haas oscillations, thanks to which it is possible to determine physical parameters of the sample, such as effective mass of charge carriers and fundamental frequency.
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Smoothing device for FDM 3D prints
Dubský, Jan ; Čudek, Pavel (referee) ; Bayer, Robert (advisor)
This bachelor’s thesis deals with a design of a device that would smooth out 3D prints, made of various materials, using FDM 3D printers. It explains the principle of 3D printing and describes technologies used in 3D printing. In this work is an overview of materials used for 3D printing and of some selected organic solvents. It describes methods of vapour smoothing and aerosol smoothing that can be used for smoothing out of 3D prints surface. The vapour smoothing method was experimentally tested using these solvents: acetone, dichloromethane, chloroform and tetrahydrofuran. The aerosol smoothing method used a solution of acetone and dichloromethane in the ratio of 1:1. Both methods were tested on samples made of PLA, ABS, PETG and SBS. This paper describes the design of a device for smoothing of 3D prints with regard to the chemical compatibility of used construction materials and ease of use of the device.
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Alternative Drive of Automobile
Dubský, Jiří ; Kloss, Ondřej (referee) ; Kaplan, Zdeněk (advisor)
This bachelor work deal with problems alternative drive for automobile with narrower intent on hybrid drive. Features run - down and description possible options for drive cars. Further is focused on cars with hybrid drive and on problems hereof unconventional drive with presentation characteristic feature, advantages and disadvantage.
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Measurement and Evaluation of Business Performance
Dubský, Jan ; Kruntorádová, Markéta (referee) ; Kocmanová, Alena (advisor)
Aim of this batchelor thesis is to measure and evaluate efficiency of Honeywell spol, s.r.o. from 2015 to 2019. Thesis consists of three parts. First part focuses on theory. This part explains basic terms of financial analysis. Second part aims to introduce the company. Last part focuses on analysis of firm‘s efficiency that is measured by differential and aggregate indicators. This part also includes suggestions that could contribute to better financial health of the company. Financial analysis revealed that the company is financially healthy, with low risk of bankruptcy and also have no problems with bonita.
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Production planning in the company
Dubský, Jan ; Jurová, Marie (referee) ; Juřica, Pavel (advisor)
This diploma thesis deals with the analysis of the production planning in a selected company and the analysis of the planning processes in the information system. The first part is devoted to defining the relevant theoretical themes. In the next part company and its results are described, the next part contains an analysis of the production planning process. The analytical part further displays theory of constraints, that is used to determine weak point. Based on weak point, the suggestion part describes implementation project of the new information system so that the weak point is eliminated.
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Extensible disassembler with support for interactive instruction reordering
Dubský, Jan ; Bulej, Lubomír (advisor) ; Jermář, Jakub (referee)
Machine code disassembling is a process of transforming binary machine code into assembly code. The main purpose of this process is to help people to understand the purpose of the program without knowing its source code. Unfortunately, the machine code produced by compilers is quite hard to read due to numerous optimizations applied to it. One substantially problematic optimization is instruction scheduling which mangles instruction order to increase final performance. The goal of this thesis is to implement a disassembler capable of reordering individual instructions. This would allow the user to restructure the machine code into a more read- able form. To provide such functionality, the disassembler has to be able to understand the meaning of machine code instructions. For this reason, we will design a platform- independent internal representation of machine code and we will translate any machine code into it. This representation will be then used to analyze dependencies between in- structions which can be further used in instruction reordering algorithm. At the very end, we will discuss the possibility of platform-independent program emulation based on internal disassembler representation. 1
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Measurement and Evaluation of Business Performance
Dubský, Jan ; Kruntorádová, Markéta (referee) ; Kocmanová, Alena (advisor)
Aim of this batchelor thesis is to measure and evaluate efficiency of Honeywell spol, s.r.o. from 2015 to 2019. Thesis consists of three parts. First part focuses on theory. This part explains basic terms of financial analysis. Second part aims to introduce the company. Last part focuses on analysis of firm‘s efficiency that is measured by differential and aggregate indicators. This part also includes suggestions that could contribute to better financial health of the company. Financial analysis revealed that the company is financially healthy, with low risk of bankruptcy and also have no problems with bonita.
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Low energy excitations in oriented graphite by THz magneto-optical spectroscopy
Dubský, Jan ; Kunc, Jan (referee) ; Vrba, Radimír (advisor)
This master’s thesis deals with the modelling of electronic properties of graphite crystal, which are measurable using a spectrometer based on high frequency electron paramagnetic resonance (HFEPR for short) located in laboratories of CEITEC BUT. This is especially the band structure of graphite and its Landau levels. The theoretical part of the thesis describes key effects and connections from quantum mechanics and definitions of important terms from solid state physics, which are used to describe the crystalline structure of graphite and its electronic properties. Furthermore, the project describes the HFEPR spectrometer and its functional principle. In the practical part of the thesis, there are numerical models of the band structure of graphite and of its Landau levels and description of the preparation of a graphite sample for measurement. At the end of the practical part there is the analysis of measurements results, namely the cyclotron resonance and Shubnikov-de Haas oscillations, thanks to which it is possible to determine physical parameters of the sample, such as effective mass of charge carriers and fundamental frequency.
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Smoothing device for FDM 3D prints
Dubský, Jan ; Čudek, Pavel (referee) ; Bayer, Robert (advisor)
This bachelor’s thesis deals with a design of a device that would smooth out 3D prints, made of various materials, using FDM 3D printers. It explains the principle of 3D printing and describes technologies used in 3D printing. In this work is an overview of materials used for 3D printing and of some selected organic solvents. It describes methods of vapour smoothing and aerosol smoothing that can be used for smoothing out of 3D prints surface. The vapour smoothing method was experimentally tested using these solvents: acetone, dichloromethane, chloroform and tetrahydrofuran. The aerosol smoothing method used a solution of acetone and dichloromethane in the ratio of 1:1. Both methods were tested on samples made of PLA, ABS, PETG and SBS. This paper describes the design of a device for smoothing of 3D prints with regard to the chemical compatibility of used construction materials and ease of use of the device.
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