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Smoothed Particle Hydrodynamics in Structural Dynamics
Hušek, Martin ; Králik,, Juraj (referee) ; Maňas,, Pavel (referee) ; Kala, Jiří (advisor)
The focus of the thesis is on the application of the Smoothed Particle Hydrodynamics (SPH) method in structural dynamics with an emphasis on usage of quasi-brittle materials. The first part is focused on the introduction, history, and theoretical background of SPH. Numerical examples in which strengths and weaknesses of SPH are shown follow. In addition to pure SPH models, several coupling approaches with the Finite Element Method (FEM) are also discussed. After the introduction of SPH, the focus is on quasi-brittle materials and their reinforced variants. The numerical concept and mathematical background of the Continuous Surface Cap Model are outlined, several benchmarks are presented. Strain-rate effects and their impact on pure SPH and coupled SPH-FEM models are evaluated next. In this section, the author proposes a new approach for SPH models reinforcement with FEM beam elements. The coupling approach was named sublayer coupling and shows a potential in simulations while the SPH tensile instability is alleviated. Since concrete is often associated with heterogeneity and very specific material structure, a unique algorithm for concrete structure generation in combination with SPH is proposed in the next chapter. The concept is based on utilization of coherent noise functions which can bring a variability to numerical models. It has been proved that the algorithm is robust, stable, and easy to implement into the SPH framework. With regard to that, the so-called numerical heterogeneity, a concept of parameters variability implementation, is introduced together with examples. The last part of the thesis is dedicated to the application of SPH in real experiments. The first experiment focuses on a high velocity impact. The second experiment deals with an explosion in which the focus is on both the loaded specimen and charge. Since SPH simulates the explosive, detonation products, and the loaded specimen, it is a fully coupled fluid-structure interaction simulation.
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The EU Enlargement in the Context of the Financial and Economic Crisis
Nguyen, Gary ; Malý, Martin (referee) ; Ptáček, Roman (advisor)
This thesis focuses on the enlargement of the EU in the context of the impact of the financial and subsequent economic crisis. The thesis is divided into chapters. The first chapter introduces the causes and impacts of the crisis. The following chapter focuses on the performance history of the EU and the reasons for its expansion. The third section presents the current candidate and potential candidate countries in terms of their productivity and the development of relations with the EU. The last chapter identifies possible solutions proposed and attitudes towards expanding this unity. It is also analyzed the main objective of the work. The conclusion summarizes the findings of the thesis.
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Strain and stress analysis of the car buffer zone under impact loading
Nedělka, Pavel ; Obdržálek, Vít (referee) ; Vrbka, Jan (advisor)
The master thesis deals with a stress-strain analysis of the front crash structure of a race car by using the finite element method. The structure is loaded by an impact loading. This type of analysis belongs to the transient analysis so the explicit formulation of the finite element method is used. The LS-DYNA software was used for calculations. The goal of this thesis is to express the influence of the crash structure to the change of the car's kinetic energy as well as the amount of absorbed energy in case of frontal impact.
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Impact of Euro Implementation on Corporation Finance
Hrabec, Filip ; Trojan, Ladislav (referee) ; Breinek, Pavel (advisor)
This master's thesis analyzes the impact of euro implementation on corporation finance of a particular company. Czech Republic's accesion to the monetary union will entail positive and negative changes that will affect all entities in the economy. In this thesis, these impacts are analyzed and their expected net effect on the company is determined. The conclusion is focused on the evaluation of the impact of the single currency on the company, identification of the main risks associated with the necessary transformations and suggestion of the recommendations that will help the company to a successful transition to the euro.
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Decision Risks Management Methods
Janošík, Petr ; Chudý, Peter (referee) ; Kreslíková, Jitka (advisor)
This thesis deals with the matter of risk managament in IT projects. It explains the importance of risk management in such projects and shows different ways and methods of managing and analyzing the risks. After explaining the basic concepts and the various phases of risk management the text focuses on two methods of risk analysis - the fault tree analysis of event tree analysis. Use of both methods is explained for both quantitative and qualitative analyses. The second half of the work includes the design of an application for the support of risk analysis employing the methods of fault tree analysis and event tree analysis. This is followed by a description of the implementation of the proposed system in a web environment using jQuery, Nette Framework and Dibi.
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Study of impact of a transport vehicle into a structure.
Sychrová, Šárka ; Salajka, Vlastislav (referee) ; Němec, Ivan (advisor)
Master's thesis deals with the analysis of the impact of transport vehicle on a building structure. Transport vehicle is represented by an airliner and building structure is represented by a containment of a nuclear power plant. The aim of thesis was to explore the possibility of numerical simulation of an impact of transport vehicle on a building structure utilizing the RFEM program and evaluation of the damage extent.
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Impact of color models on performance of convolutional neural networks
Šimunský, Martin ; Doležel, Petr (referee) ; Škrabánek, Pavel (advisor)
Current knowledge about impact of colour models on performance of convolutional neural network is investigated in the first part of this thesis. The experiment based on obtained knowledge is conducted in the second part. Six colour models HSV, CIE 1931 XYZ, CIE 1976 L*a*b*, YIQ a YCbCr and deep convolutional neural network ResNet-101 are used. RGB colour model achieved the highest classification accuracy, whereas HSV color model has the lowest accuracy in this experiment.
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Economic and Financial Impacts of Investment Project on Public Investor
Plecová, Veronika ; Mrňa, Daniel (referee) ; Hromádka, Vít (advisor)
The aim of the master‘s thesis is to evaluate the economic and financial impacts of the investment project on the public sector. It is defined the financial management of the investor – the village Ludkovice – for the assessing of the impacts. Selected project is the construction of a sports complex in Ludkovice. Outputs are determined by using eCBA application that uses method of Cost Benefit Analysis. The thesis connects together theoretical knowledge of evaluation economic indicators such as Net Present Value, Internal Rate of Return and Profitability Index and use this calculations to evaluate the overall effectiveness of investment and the possibility of financing in practice.
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Quantified approach to risk analysis in case of cyber security
Řezáč, Petr ; Brychta, Josef (referee) ; Fujdiak, Radek (advisor)
This bachelor thesis deals with the quantitative approach to risk analysis in the frame-work of cyber security. The first part is devoted to the theoretical level. There are defined basic terms connected with cyber security and cyberspace. The risk management process according to ISO / IEC 27005 and NIST methodology is described. Furthermore, a comparison of individual risk analysis methods is performed. Finally, examples of quantitative methods are presented and the CIA triad is presented. The second part of this thesis is dedicated to the QRA method. This method is applied to two devices and probability, impact and risk are calculated. Finally, the evaluation and comparison of both devices is performed. The benefit of this bachelor thesis is a compiled methodology, which is applicable not only for the determination of the risk itself, but it is also possible to compare individual systems, equipment or solutions among them.
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