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Analysis of an Electromagnetic Wave on the Boundary between Electromagnetic Materials
Kadlec, Radim ; Lazar, Josef (referee) ; Macháč, Jan (referee) ; Kroutilová, Eva (advisor)
The proposed dissertation thesis contains an analysis of conditions on the boundary between layers having varied electromagnetic properties. The research is performed using consistent theoretical derivation of analytical formulas, and the underlying problem is considered also in view of multiple boundaries including the effect of the propagation of electromagnetic waves having different instantaneous speed. The author presents a survey and formulation of the basic characteristics of methods used for electromagnetic wave propagation analysis; in this respect, special emphasis is placed on radial models. The processing of the topic involved the designing and verification (using a set of different, layered planar materials) of algorithms to analyze the electromagnetic field components. The algorithm was assembled to enable simple evaluation of all components of the electromagnetic field in relation to the speed of the wave propagation in a heterogeneous environment. The proposed algorithms are compared by means of different numerical methods for the modelling of electromagnetic waves on the boundary between materials; moreover, electromagnetic field components in common points of the model were also subject to comparison. When in conjunction with tools facilitating the analysis of material response to the source of a continuous signal, the algorithms constitute a supplementary instrument for the design of a layered material. Such design enables the realization of, for example, recoilless plane, recoilless transition between different types of environment, and filters for both optical and radio frequencies.
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Parameter optimization of MR sequences for magnetic susceptibility measurement
Pinkava, Jan ; Bartušek, Karel (referee) ; Steinbauer, Miloslav (advisor)
The Bachelor thesis deals with measuring magnetic susceptibility by means of nuclear magnetic resonance. Magnetic field is affected and deformed by various materials. The range and the shape of the deformation is caused by susceptibility. The thesis contains a 2D numerical model of a sample in a magnetic field 4.7 T. The results are compared with values obtained by a tomographic measurement. The second part of the thesis contains a 3D numerical model of diamagnetic and paramagnetic material. Moreover, a comparison with values measured in reality is drawn.
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High-tilting transport box for mini tractors
Zapletal, Josef ; Šálek, Pavel (referee) ; Škopán, Miroslav (advisor)
The aim of this diploma thesis is design of a high-tilting box for small tractors, used for transport of bulk materials and piece loads in agriculture, forestry, and municipal maintenance. Thesis includes a research of the used solutions of tipping boxes and shovels, design of own concept of the tipping mechanism, choice of a hydraulic motor, strength proof of the main parts using the finite element method, and the design of pins and bearings.
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Analysis of an Electromagnetic Wave on the Boundary between Electromagnetic Materials
Kadlec, Radim ; Lazar, Josef (referee) ; Macháč, Jan (referee) ; Kroutilová, Eva (advisor)
The proposed dissertation thesis contains an analysis of conditions on the boundary between layers having varied electromagnetic properties. The research is performed using consistent theoretical derivation of analytical formulas, and the underlying problem is considered also in view of multiple boundaries including the effect of the propagation of electromagnetic waves having different instantaneous speed. The author presents a survey and formulation of the basic characteristics of methods used for electromagnetic wave propagation analysis; in this respect, special emphasis is placed on radial models. The processing of the topic involved the designing and verification (using a set of different, layered planar materials) of algorithms to analyze the electromagnetic field components. The algorithm was assembled to enable simple evaluation of all components of the electromagnetic field in relation to the speed of the wave propagation in a heterogeneous environment. The proposed algorithms are compared by means of different numerical methods for the modelling of electromagnetic waves on the boundary between materials; moreover, electromagnetic field components in common points of the model were also subject to comparison. When in conjunction with tools facilitating the analysis of material response to the source of a continuous signal, the algorithms constitute a supplementary instrument for the design of a layered material. Such design enables the realization of, for example, recoilless plane, recoilless transition between different types of environment, and filters for both optical and radio frequencies.
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Parameter optimization of MR sequences for magnetic susceptibility measurement
Pinkava, Jan ; Bartušek, Karel (referee) ; Steinbauer, Miloslav (advisor)
The Bachelor thesis deals with measuring magnetic susceptibility by means of nuclear magnetic resonance. Magnetic field is affected and deformed by various materials. The range and the shape of the deformation is caused by susceptibility. The thesis contains a 2D numerical model of a sample in a magnetic field 4.7 T. The results are compared with values obtained by a tomographic measurement. The second part of the thesis contains a 3D numerical model of diamagnetic and paramagnetic material. Moreover, a comparison with values measured in reality is drawn.
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