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Simultaneous EEG/fMRI analysis using EEG data processing
Ištok, Martin ; Vítek, Martin (referee) ; Lamoš, Martin (advisor)
The main objective of this diploma thesis is to describe simultaneous electroencephalography-correlated functional magnetic resonance imaging analysis using EEG data processing. It includes basic characteristics of EEG and fMRI recording and analysis and their combination as simultaneous EEG/fMRI analysis and deals with obstructions during its processing. The thesis includes a design of an experiment used for recording and analysis of simultaneous EEG/fMRI data using EEG source reconstruction for regressor construction. Thesis incorporates a software solution used for extraction of signal describing a source activity interpolated by EEG source reconstruction. The signal is then processed and used to construct a basic regressor. The thesis also deals with the software solution being used for a study focused on intracranial epileptic discharges localization using a simultaneous EEG/fMRI analysis in which it reveals source activity during ongoing epileptic spike and summarizes the results.
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Boundary Vorticity Element Method for 2D Fluid Flow
Fic, Miloslav ; Pochylý, František (referee) ; Štigler, Jaroslav (advisor)
This master’s thesis deals with boundary vorticity element method for 2D fluid flow. The aim of this work is to program this method with continuous vorticity lay-out and to validate method with various boundary conditions. The computed results are presented in this work. Advantages and disadvantages of each one boundary condition are pointed out. New one boundary condition for boundary vorticity element method is applied in this thesis.
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Creating visual components of web using Object Oriented CSS and BEM methodology
SMRŽ, Jan
The aim of this thesis is to use the right approach when writing object-oriented CSS (OOCSS) code in HTML5 and using the methodology of BEM while developing frontend. OOSCC is a way to write easily understandable code which can be used multiple time is simple to manage and does not take much space. BEM methodology gives us an approach that is used to correctly name different blocks, elements or modifiers. Both of them together can be used to simplify writing CSS not only for the person writing it but also for everyone else on the team. In this thesis I will be comparing writing object-oriented CSS, benefits of using BEM methodology and not using either of these approaches. The outcome of this work will be a web presentation consisting of OOCSS with BEM methodology, time consumption, data size and difficulty of development for developers.
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Simulation of fatigue crack propagation in the wing main spar flange
Augustin, Petr
Simulation of fatigue crack growth in the bottom flange of twin turboprop commuter aircraft wing spar is described in this paper. Analysed crack propagation scenario represents real wing full-scale fatigue test failure. Computational model of bottom flange was prepared using three-dimensional fracture mechanics software FRANC3D. Calculation of crack growth under the variable amplitude loading was performed in AFGROW code using the NASGRO equation and Wheeler retardation model. It was verified with the results of wing spar specimen fatigue test and fractograpic analysis of fatigue fracture from this experiment. Computational model was applied in the prognostic algorithm of structure health monitoring system.
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Application of boundary element method for calculation of electric field in a radiofrequency ion trap
Vavřička, Radek ; Roučka, Štěpán (advisor) ; Hromádka, Jakub (referee)
In this thesis we explore numerical methods that could be used to solve La- place's equation. We compare the boundary element method (BEM), implemen- ted in Bempp library, and the finite element method (FEM), implemented in FEniCS library, by using them to solve Laplace's equation in the cases of a mul- tipole and a rf ion trap, which we create a model of through the use of Gmsh. In order to gauge effectiveness of a method, we measure the time of evaluation, me- mory usage and the squared deviation from theoretical values (if we know them) summed over the points of evaluation. In the end, we use the known values of electric field to simulate a charged particle moving within the trap, comparing evolution of its position and velocity for BEM and FEM. 1 2
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Boundary Vorticity Element Method for 2D Fluid Flow
Fic, Miloslav ; Pochylý, František (referee) ; Štigler, Jaroslav (advisor)
This master’s thesis deals with boundary vorticity element method for 2D fluid flow. The aim of this work is to program this method with continuous vorticity lay-out and to validate method with various boundary conditions. The computed results are presented in this work. Advantages and disadvantages of each one boundary condition are pointed out. New one boundary condition for boundary vorticity element method is applied in this thesis.
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Simultaneous EEG/fMRI analysis using EEG data processing
Ištok, Martin ; Vítek, Martin (referee) ; Lamoš, Martin (advisor)
The main objective of this diploma thesis is to describe simultaneous electroencephalography-correlated functional magnetic resonance imaging analysis using EEG data processing. It includes basic characteristics of EEG and fMRI recording and analysis and their combination as simultaneous EEG/fMRI analysis and deals with obstructions during its processing. The thesis includes a design of an experiment used for recording and analysis of simultaneous EEG/fMRI data using EEG source reconstruction for regressor construction. Thesis incorporates a software solution used for extraction of signal describing a source activity interpolated by EEG source reconstruction. The signal is then processed and used to construct a basic regressor. The thesis also deals with the software solution being used for a study focused on intracranial epileptic discharges localization using a simultaneous EEG/fMRI analysis in which it reveals source activity during ongoing epileptic spike and summarizes the results.
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Theoretical background for determining the fracture-mechanics parameters using the Boundary Element Method
Gröger, Roman
Boundary Element Method is a powerful tool for certain class of Solid Mechanics problems, where the fundamental solution of the governing differential equation is known. This article briefly outlines the theoretical background of BEM for plane problems as well as integral identities for calculation of internal stresses and displacements. Chapter 2 introduces the most useful contour integrals for calculation of fracture parameters in two-parameter linear elastic fracture mechanics. These coefficients are solved using the stress and strain tensor field calculated using BEM. All the proposed and discussed approaches are compared and the differences between FEM and BEM are discussed.
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