|
|
Establishing Mutual Links among Brain Structures
Klimeš, Petr ; Hlinka,, Jaroslav (referee) ; Krajča,, Vladimír (referee) ; Halámek, Josef (advisor)
The Human brain consists of mutually connected neuronal populations that build anatomically and functionally separated structures. To understand human brain activity and connectivity, it is crucial to describe how these structures are connected and how information is spread. Commonly used methods often work with data from scalp EEG, with a limited number of contacts, and are incapable of observing dynamic changes during cognitive processes or different behavioural states. In addition, connectivity studies almost never analyse pathological parts of the brain, which can have a crucial impact on pathology research and treatment. The aim of this work is connectivity analysis and its evolution in time during cognitive tasks using data from intracranial EEG. Physiological processes in cognitive stimulation and the local connectivity of pathology in the epileptic brain during wake and sleep were analysed. The results provide new insight into human brain physiology research. This was achieved by an innovative approach which combines connectivity methods with EEG spectral power calculation. The second part of this work focuses on seizure onset zone (SOZ) connectivity in the epileptic brain. The results describe the functional isolation of the SOZ from the surrounding tissue, which may contribute to clinical research and epilepsy treatment.
|
|
|
Commented translation
Rajsigl, Tomáš ; Kotásek, Miroslav (referee) ; Smutný, Milan (advisor)
Bakalářská práce se zabývá překladem odborného textu z časopisu Energo zaměřeného na elektrotechniku, konkrétně obor energetiky. Ze vzniklého textu je vytvořen komentář za účelem analýzy rozdílů mezi originálem a překladem. Součástí je diskuze o přenosu informací, kohezi textu, terminologii a lokalizaci. V práci je také část věnovaná podrobnostem odborného stylu.
|
|
|
Processing of EEG signals in frequency domain
Nováková, Jarmila ; Potočňák, Tomáš (referee) ; Kozumplík, Jiří (advisor)
Sleep EEG is occupied by this project. It is aimed at processing signal which precede test of stationarity. It also deals with the issue of stationarity of sleep EEG with indicating of three types of segmentations. Principles of three types of segmentation are explained and their realization is compiled in the environment of Matlab by the way which enables to choose different input parameters. The change of stationarity is examined in various stages of sleep with the help of the results thus created functions. Another aspect of this study is the investigation of changes in the development of absolute and relative power over time according to transition between stage of wakefulness and stage of sleep. It is searched for the occurrence of these changes also in the development of the coherence spectra.
|
|
|
Design of the Multicore Processor in VHDL
Novotný, Jaroslav ; Straka, Martin (referee) ; Kaštil, Jan (advisor)
The objective of the thesis is to design and implement in the VHDL language a simple multiprocessor supporting parallel computing. Furthemore, the author has designed and realized universal transparent generic interconnection layer with the objective to connect any given number of processor cores to shared address space using arbitrated bus. Parametrized cache has been allocated to each core in the layer. MSI protocol was used to deal with the issue of memory coherence of the implemented system. Direct and indirect synchornisation support is available to the user. In order to verify the functionality of the system, simple processor core has been designed and implemented, and its copies were connected to the interconnection layer. Various testing programmes have been used to verify the functionality of the system, which also confirmed that the acceleration of computing has been achieved successfully. Virtex6 chip has been used to test the whole system.
|
|
|
Classification of mental workload using brain connectivity measure
Doležalová, Radka ; Kolářová, Jana (referee) ; Ronzhina, Marina (advisor)
Tato práce se zabývá využitím EEG dat pro výpočet mozkové konektivity a vytvořením klasifikátoru mentální zátěže. Nejdříve je popsán teoretický základ EEG, následně jsou rozebrány některé metody pro určení mozkové konektivity. Pro výpočet klasifikačních příznaků byla použita data nasnímaná během experimentu, který manipuloval s mentální zátěží ve dvou stupních. V práci je popsán průběh experimentu, zpracování a redukce nasnímaných dat, stejně jako extrakce příznaků z nasnímaných EEG dat pomocí několika metod měření konektivity (korelační funkce, kovariance, koherence a míra fázové soudržnosti) a následná automatická klasifikace třemi způsoby (na základě vzdálenosti od vzoru tvořeného průměrem, metoda nejbližšího souseda a diskriminační alanýza). Dosažené výsledky jsou detailně popsány a diskutovány. Nejlepšího výsledku (úspěšnost 60,64%) bylo dosaženo při použití kovarianční matice určené z dat získaných ze 4 elektrod z různých mozkových oblastí (beta pásmo EEG) při klasifikaci založené na lineární diskriminační funkci.
|
|
|
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.
|
|
|
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.
|
|
|
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.
|
|
|
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.
|
|
|
Role diskurzních markerů v bezprostřední neformální konverzaci rodilých a nerodilých mluvčích
SOMMEROVÁ, Petra
The thesis is focused on the study of discourse markers in English informal language. The main corpus includes seven face-to-face conversations of native and non-native speakers and serves as the basis for the research. At first, necessary linguistic terms are defined. Then, the corpus and speakers{\crq} characteristics are presented. The practical part concerns frequency, different functions and positions of particular discourse markers. The factors which might influence the possible choice of discourse markers and its motivation are focused on. Attention is also paid to the frequency of discourse markers used by the class of non-native speakers who were divided to the sub-classes of pre-intermediate, intermediate and advanced. The work further observes co-occurrence of the markers and ambiguous expressions that are not easily distinguishable. Finally, the results of the research are interpreted and analyzed.
|
guest ::
