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Implementation of UMTS package in NS2
Bernát, Michal ; Kovář, Petr (referee) ; Šimek, Milan (advisor)
This bachelor thesis is in the first part focused to research of actual IPTV technologies in global and mobile networks and their processing. It compares IPTV's adventages and disadventages and as well presents actual czech and world-wide offers. There are also discussed other possibilities of mobile TV spreading. Second part deals with the simulation tool NS2 (Network Simulator 2), its description, installation and implementation of extension package for UMTS network simulations. There is created and described simulation with relatively simple scenario to illustrate possibilities of this extension. All practical demonstrations and the installation source codes, which had to be corrected because of compatibility with new versions of operating systems, are now attached to the DVD.
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Modern treatments by powder paints
Turek, Tomáš ; Kovář, Petr (referee) ; Kubíček, Jaroslav (advisor)
The thesis deals with the process of powder coating paint, a description of the individual steps and types of used equipment. Thesis also includes the distribution of powder paints and overview of basic information, color chart systems and the description of color tone perception. At the end of the thesis are summary of quality standards of deposited surface and technologic process of coating using in the powder coating in paintshop.
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Design of MAN security
Pěček, Martin ; Kovář, Petr (referee) ; Zeman, Václav (advisor)
The object of this thesis is to solve a problem with MAN net malfunction. MAN net worked without bigger problems. At certain moment it lost the ability to ensure data transmission. The thesis deals with the transmission technology analysis, it´s security and analysis of possible causes of MAN net malfunction. The result is a proposal of arrangements leading towards removal of the malfunction.
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SIP client development in JavaME
Janeček, Aleš ; Přinosil, Jiří (referee) ; Kovář, Petr (advisor)
This thesis analyzes various alternatives of SIP protocol implementation on Java Micro Edition devices. This analysis is especially concentrated on SIP protocol, SIP API (JSR-180) and the development in contemporary mobile data networks. I design a midlet for a mobile phone SIP client on the basis of this analysis. The design is especially concentrated on communication, registration and text mesage transfer.
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Filler materials for the fusion welding
Durajová, Věra ; Kovář, Petr (referee) ; Daněk, Ladislav (advisor)
The bachelor´s thesis elaborated in frame of bachelors studies branch B2341 deals the problematic filler material for fusion welding. On the basis belles - lettres problems technology welding and their filler material was shown it several kinds filler material for individual welding technology (MIG/MAG, hand arc welding, TIG, submerged-melt welding). First is mentioned problems rise fusing watering - place and on what principle individual technology work. After it are mentioned filler material (producer ESAB Vamberk) electrode, tubule, soft - centred tubule.
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Welding of aluminium sizable weldments.
Tkaný, Jan ; Kovář, Petr (referee) ; Daněk, Ladislav (advisor)
This thesis created within the general Bachelor's study gives insight into the basic division of aluminum alloy, a summary of technologies and principles of welding aluminum and its alloys. It is focused on the description of cutting Al alloy and their suitability for welding, the characteristics of different methods and description of problems in the welding of large-scale aluminum weldments. For each of the methods are given the possibility of application, a description and diagram of operation and specifics on the protective gas or electrodes. Problems in the welding of large parts are characterized by external and internal deformations, complex stress fields, where appropriate, the temperature fields. To determine the size of the deflection angle is given an example of the chart for the practical use. In conclusion it is stated that the method is appropriate to apply in case of large weldments.
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Visualization of sound fields
Kovář, Petr ; Klusáček, Stanislav (referee) ; Havránek, Zdeněk (advisor)
This bachelor's thesis deals with problems of acoustical field visualization using near-field acoustical holography. This method is often refered as NAH. Within the thesis the basic acoustical field variables are processed and described. Two algorithms were analysed, namely the Statistically Optimal Algorithm (SONAH) and the Iterative Algorithm using the Fourier Transform (STFT) with a K-filter (Wave-Domain Filter). These algorithms are described in detail. The outcome of the practical part of this thesis is the application for sound pressure visualization. The application is created in the LabVIEW environment from the known codes and the calculation of the sound pressure is performed with one of the two algorithms described in this thesis. From depicted acoustical maps the disadvantages of this method and differences between algorithm are shown. These algorithms are then compared according to speed of the calculation.
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Repair of machinery
Teplý, Miroslav ; Kovář, Petr (referee) ; Kubíček, Jaroslav (advisor)
Theme of this Bachelor´s thesis deal with problems of repair of machinery - repair the shaft. The thesis is divided into two parts. The first part deals with the possibility of using thermal spraying for the renovation of the shaft surface at the point of contact with the shaft seal ring. The second part deals with the use of epoxy putty for the renovation of the shaft surface at the imposition of a bearing.
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VoIP and QoS
Kolmačka, Jan ; Křivánek, Vítězslav (referee) ; Kovář, Petr (advisor)
The bachelor’s thesis gives the basic information about the solution of a problem with Quality of Service in sequence with the VoIP telephony. In a few last years the VoIP technologies and basically the other multimedia applications have unbelievable grow. It is caused by a big demand internet user’s for the new interactive applications offering voice transfers and streaming video. These new habits bring quite big requests on networks from the side of QoS. That is why, it was necessary to develop new methods, which reach requested parameters of QoS in single categories. The first part discuss theoretically about protocols used in the VoIP telephony. The second part presents QoS, parameters of QoS and two basic methods for guarantee QoS. In the last part of the bachelor’s thesis is theoretically described the QoS support in Wi-Fi with the main aim on new technologies QoS reservation defined in the 802.11e. The following simulations and the results of the different settings parameters QoS are made by the powerful simulating software Opnet Modeler.
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