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Mobile internet principles
Jehličková, Lenka ; Fencl, Josef (referee) ; Hanus, Stanislav (advisor)
Thesis concerns with mobile communications theory with focus on data transfer. In the introduction the history, the origin and individual mobile systems generations are described. It is followed by detailed description of second, third and fourth generation mobile systems. Frequency band allocation, signal processing, the system architecture itself, security management and basic features are also discussed. The GSM system is described together with individual data transmission types based on circuit switching – CSD and HSCSD and packet switching – GPRS and EDGE. For UMTS, FDD and TDD modes are listed as well as changes in individual releases, corresponding technologies and provided services. Next, there is the description of LTE and WiMAX systems, together with their improvements whose are part of the fourth generation of mobile systems. Last of the described systems is the still work in progress HAPS, also known as the system of stratospheric platforms. In the end important parameters are summarized and systems are compared with each other.
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Analysis of the properties of liquid crystalline materials
Bodeček, Martin ; Rozsívalová, Zdenka (referee) ; Frk, Martin (advisor)
Master´s thesis covers introduction to the problems of materials with specific proprieties named liquid crystals. Theoretic part features primary fission these materials, theirs mechanical, electrotechnical and optical characteristics. Interesting chapter is description choice application including perhaps most interesting using liquid crystals - liquid crystal display. In this trend continues experimental part too, where there are first mentioned characteristics LCD, and after it alone metering capacitive characteristics display with active matrix. Main attention in experiment is however concentraded on evaluation frequency analysis of components complex permittivity regarding in plant temperature on submitted sample liquid crystals.
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Application of modern active blocks in harmonic oscillators
Votýpka, František ; Kubánek, David (referee) ; Slezák, Josef (advisor)
This work deals with using modern active functional blocks in electronic circuits. These blocks have better features than classical operational amplifiers and are characterized especially by working in current mode. Therefore these blocks can be used in higher frequencies. Using those blocks it is possible to design e.g. electronically variable-frequency filters of types low-pass filter, high-pass filter, band-pass filter, etc. Then it is also possible to easily realize electronically variable-frequency oscillators. This work is focused on some of these blocks, their basic characteristics and principles. Also three oscillators with current conveyors of second generation are designed. Its made simulation, sensitivity and tolerance analysis and magnitude stabilization. Everything is performed in OrCAD PSpice program. These made oscillators are electronic tunable in the band frequency ones of MHz.
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Computer analysis of sport matches
Židlík, Pavel ; Balík, Miroslav (referee) ; Atassi, Hicham (advisor)
This work deals with the possibility of a fast football match analysis from audio part of record with the possibility of implementation of some methods for other than football matches as well. The first intention was concentrated on detection of whiz of the soccer whistle that has specific frequency in its specter, which is out of common speech frequency. After detection harmonic frequency , the attention was focused on the definition of whiz meaning. Referee was helpful with the issue as he informed me about the number of whiz styles and provided me with referential samples for whiz classification. Neural network with back propagation was used for definition of whiz meaning. Another subject for detection of important moments of the match was concentration on the commentator’s basic tone. In case the commentator is really excited with the match, his basic speech tone automatically intensifies with every important action of the game. Analysis of commentator’s intensified basic speech tone was realized in this work too. Also the national hymns of teams playing against each other are a significant moment of the match. That is why detection of a hymn became another subject of analysis. Advantages of MFCC were used to obtain audio signal feature, from which 20 coefficients were gained. These were used as an entrance for classifier based on neural network with back propagation. For easy usage of these methods a graphic user interface with possibility of well-arranged look on gained results and also with possibility of replaying chosen section was created.
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Modelling of vibration of dynamic systems with n-degrees of freedom
Luky, Robin ; Hadaš, Zdeněk (referee) ; Dušek, Daniel (advisor)
This Bachelor’s thesis deals with vibration of dynamic systems with luminous parameters with n-degrees of freedom. It features decision procedures of free-running undamped systems, exciting undamped systems, exciting damped systems and their natural shapes, natural frequency and gain-frequency characteristic. At the end of this Bachelor thesis there is an analysis of dynamic damper. The analysis is conducted in agreement with the theoretical procedures listed above.
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Broadband Linear Antenna Array for BAN Applications
Gaja, T.
The work deals with antenna array for application in BAN. The main attention is focused on the shaping of radiation pattern. The paper describes the principles of the designing antenna arrays with desired radiation patterns. Based on these principles the script was created in environment MATLAB which effectively analyses features of each desired antenna array. The next section of this work is focused on design of broadband Vivaldi antenna array in frequency band 4.6 – 6.6 GHz. Designed antenna array was verified in simulator of electromagnetic field CST. The antenna array was also analyzed in proximity of human tissue.
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Development of mobile application for musicians
Novotný, Miroslav ; Pavlíčková, Jarmila (advisor) ; Kutišová, Magda (referee)
The aim of this bachelor's thesis is to design and develop an Android application for musicians. The theoretical part, is conceived as an introduction to the theory of sound. Firstly, I describe the architecture of Android and the individual components that make it up. There are subsequent chapters exploring the sound from its inception, through the process of converting to digital form, to a description of the individual interfaces for the recording and processing from within the environment of an Android system. The practical part, is devoted to designing and developing an application that serves as a tool for practicing playing a musical instrument. The application consists of various features such as: tuner, metronome and an EarTrainer. To understand the component of a tuner it has been necessary to study a theory needed to support the main functionality of calculating the frequency of the recorded audio signal. For this reason, this thesis is also a theoretical introduction to the Fourier transformation. The last part of this thesis is focusing on how the tuner compares with the calculation accuracy of other competitors. Finally, The application was published for the Google Play store.
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Analysis of patients motivation for treatment and self-treatment with homeopathic medicines in the Czech Republic
Machotka, Ondřej ; Marešová, Helena (advisor) ; Pokladníková, Jitka (referee)
ANALYSIS OF PATIENTS' MOTIVATION FOR TREATMENT AND SELF-TREATMENT WITH HOMEOPATHIC MEDICINES IN THE CZECH REPUBLIC Student: Machotka, O. Tutor: Marešová, H. Department of Social and Clinical Pharmacy, Faculty of Pharmacy in Hradec Králové, Charles University in Prague, Czech Republic Background: The thesis is motivated by the desire to understand the fact that homeopathy with all its typical attributes is able to survive, be applied and further developed currently with the fairly advanced and scientifically substantiated pharmacotherapy of the last decades. Aim: The thesis aims to find out the reasons why a certain group of patients use homeopathy and visit the homeopaths. Furthermore, it attempts to determine the characteristic features of these patients and learn their own attitude to homeopathy, their experience with the homeopathic treatment, eventually how these patients compare the classical allopathic and homeopathic treatment according to the various criteria. Methods: The method consists of the focused questionnaire based research, which was carried out in three cities in the Czech Republic. The questionnaire was filled in by 82 respondents and the sample was further assessed with a frequency analysis. Results: The analysis shows that the patients plump for homeopathy mainly based on their...
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Frequency of Non-finite Clauses (gerund, present participle, infinitive) in Works of French Literature.
Černá, Daniela ; Müllerová, Eva (advisor) ; Jančík, Jiří (referee)
TITTLE: The Frequency of Non-finite Clauses (gerund, present participle, infinitive) in Works of French Literature. AUTHOR: Daniela Černá DEPARTMENT: Department of French Language and Literature. SUPERVISOR: PhDr. Eva Müllerová, CSc. ABSTRACT: The aim of the thesis is to examine the frequency and the function of non-finite clauses in selected works of French literature. It is possible to establish the characteristic features of non-finite clauses by means of a statistical research of the prevalence of particular clauses within the first ten pages of selected works of French literature. Another goal of the thesis lies in the definition of the influence of both the literary genre and the period in which the work was written on the choice of particular non-finite clauses. In conclusion, the thesis should underline the position of French non-finite clauses and could also serve as a tool for prospective French teachers in the form of a review of the representation of non-finite clauses in literary language. KEYWORDS: non-finite clause, gerund, present participle, infinitive, sentence elements
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Stereoscopic Observations of Solar Radio Emissions by the S/WavesInstrument onboard the STEREO Spacecraft
Krupař, Vratislav ; Santolík, Ondřej (advisor) ; Krucker, Samuel (referee) ; Wimmer-Schweingruber, Robert F. (referee)
This PhD thesis is primarily dedicated to a study of type III radio bursts observed by the S/Waves instrument onboard Solar TErrestrial RElations Observatory (STEREO). These emissions are produced by beams of suprathermal electrons escaping the corona along open magnetic field lines during increased solar activity. As fast electrons propagate in the interplanetary (IP) medium, Langmuir waves are generated at the local electron plasma frequency fpe by a bump-on-tail instability and can be afterwards converted by a non-linear process into radio emissions at fpe and/or 2fpe: type III radio bursts. We have developed a goniopolarimetric (GP, also referred to as direction-finding) inversion using the Singular Value Decomposition (SVD) technique for electric measurements on three non-orthogonal antennas. It allows us to retrieve both wave vector directions and polarization properties of incident waves. We have also investigated the influence of extended sources (as a typical feature of type III radio bursts) on measured spectral matrices. We have found an empirical relation between apparent source sizes and spectral matrices decomposed by SVD. Abovementioned techniques have been extensively tested on data obtained by the High Frequency Receiver (HFR, a part of S/Waves). We have performed statistical analysis of a...
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