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Michelson's interferometer
Rýc, Jan ; Klusáček, Stanislav (referee) ; Havránek, Zdeněk (advisor)
The diploma work deals with techniques of optical contactless distance and velocity measurement. A basic summary of the methods are involved. The problematic of interferometric methods for vibration measurements is analysed in detail. It contains division of interferometers, description of their function principles and also chapters dealing with elements used in interferometers such as lasers, photodetectors and elements in the ray optical way - polarizers, retarders, optical isolators. The vibration and length measurement methods are described, as well as the conception of homodyne and heterodyne detection. Part of this work focuses on the quadrature signal processing and on the proposal of algorithm for demodulation of velocity/displacement and undergoing simple motioning object deviation. This algorithm is implemented in Labview and the whole software instrument served also for visualisation of measured data of the interferometer model constructed in the laboratory. The way how to build up a model, its setting and two possible configurations suitable for homodyne detection are described. Model of interferometer is built-up on the optical breadboard. Particular components are fixed by the help of mounts. The model and software enable to measure the velocity and the vibration deviation with the light wavelength exactness. Functionality and the exactness of the laboratory model are verified by vibrometer. Effects on the measurement uncertainty are discussed here and ways how to restrain them are proposed.
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Optical signal detection and maesurement of low deflections using the Michelson interferometer
Kováč, Petr ; Hudcová, Lucie (referee) ; Křivák, Petr (advisor)
The dissertation is concerned with the description and utilization of interference of two coherent optical rays. In addition, the conditions of coherence and its connections with the occurance of interference are discussed. Michelson's interferometer is used for the practical utilization of the interference effect. The possibility of measuring relatively small changes is demonstrated - deviation of piezocrystal, measurement of the coherent length of optical source and measurement of the index of refraction of tramsparent materials. The manner of optical coherent detention and its utilization in optical communication systems is indicated. After demonstration of the principle was carried out the measuring of detection of optical signal modified by the external modulator.
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Cohesion and coherence of the comic books´ text (Astérix and Obélix).
BEDNAŘÍKOVÁ, Nikola
This diploma thesis deals with the analysis of the comic book´s texts. The objective of this thesis is the analysis of relationships in this kind of texts, with a special focus on its illustrational constituent part and on the description of several types of anaphora. As a model to the elaboration of this thesis were a few of comic books Astérix, published in French language. The thesis is divided into a theoretical and an analytical part. The theoretical part contains three different chapters. First of them deals with the description of comic books as an individual art, the second one describe the comic books Astérix and the third one is dedicated to the linguistic terms, which are closely connected to this subject. All referential relationships between the referential parts of some of comic books Astérix are demonstrated in the analytical part.
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Identification of coherence in turbulent flows by local correlations
Tesař, Václav ; Něnička, Václav
Coherent structures are not included in practically useful models of turbulence due to scarcity of data upon which the modelling could be based. The problem is indistinct, vague, and continuously varying boundary of each structure, making difficult even identification of its very existence. The introduced identification method operates with a pair of flow visualisation images, computing local correlation coefficients in sequentially interrogated small image parts. The coherence is revealed by high local values of the coefficient. There are two variants, a scalar and vector approaches. The method is shown applied to an experiment in which the structures play an important role.
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Czech-Islamic marriages from the viewpoint of gender
URBANOVÁ, Marie
The thesis is deal with Czech-Islamic marriages from the viewpoint of gender. The first part characterises the basic concepts, marriage traditions in a purely Czech society, the issue of gender in the Czech marriage, marriage traditions in a truly Islamic society, Islamic marriage, gender issues, gender issues in Czech-Islamic marriage, the ethical impact of migration, including the ethical impact of cultural migration, potential misuse of the Institute to ensure family reunification residence permit in the Czech Republic, an example of migration, with specific policy approach in France. The practical part includes a rationale for selecting the research sample, showing the chosen research methodology. Based on the interviews is confirmed by the hypothesis of the thesis that the cultural influence of gender, as a bearer of a different conception of the of man-woman gender in Islamic culture, and Czech, respectively. Czech-Islamic marriages is a significant factor in causing marital disharmony. Mutual two-way cultural knowledge, as well as the presence of tolerance, love and truth, is a prerequisite to guarantee the functional relationship. This fact is verified by the Czech-Islamic couple, in the final case report.
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