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Replica Design of L-40 "Meta Sokol " Airctaft - fuselage
Růžička, Miroslav ; Pešák, Miroslav (referee) ; Píštěk, Antonín (advisor)
This diploma thesis deals with the design of all-metal construction of fuselage of the replica L-40 Meta Sokol aircraft on the basis of CS-VLA regulation. As far as the aircraft is concerned, the thesis establishes the load of tail surfaces, landing gear and engine bed. Futhermore, it designs the construction of fuselage, tail landing gear, including the system of its retraction, wing-fuselage connection, engine bed and the primary design of cockpit. In the end, the thesis focuses on the fuselage production technology.
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Extension of Centrifugal Compressor Operational Stability
Růžička, Miroslav ; Třetina, Karel (referee) ; Kmoch, Petr (referee) ; Klement, Josef (advisor)
Centrifugal compressors with high pressure ratio are widely used in small aircraft turbine engines and turbocharges. At high rotational speeds they have narrow stable operating region and commonly used impellers with back swept blades are not able to ensure requested stability. In order to achieve wider stable operating region, some other anti-surge measures can be used, such as an Internal Recirculation Channel (IRC) located in compressor impeller inlet. This thesis deals with an investigation of IRC influence on centrifugal compressor operational parameters. As a first, the various recirculation channel geometry was studied by using of CFD analysis on simplified computational models. Those geometry, which indicated best results in terms of mass flow and looses in channel were used for testing on a model test device. Subsequently the same geometry was tested on real centrifugal compressor in experimental turbine engine to verify influence of IRC on compressor performance map – pressure ratio and efficiency. Simultaneously the CFD analyses of IRC with a 3D model of compressor impeller were performed and results compared with those, gained from measurement on model and compressor. In addition the measurement of flow field downstream the recirculation channel outlet slot with using of 3-hole pressure probe was performed and compared with flow velocity profiles evaluated from numerical simulations.
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Monitoring of Solder Spreading Velocity on Metal Surface
Růžička, Miroslav ; Dušek,, Karel (referee) ; Starý, Jiří (advisor)
This work deals with flushing monitoring of spreading velocity on solder finishes Niau, OSP, Sn deposited on copper plated base material FR4 using digital cameras. After the reflow process is measured by length of spreading solder and size of wetting angle. It evaluates and compares the time dependence of velocity of spreading solder, length of solder spreading and wetting angle for NiAu, OSP, Sn finishes at different temperatures reflow and surface treatment.
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The Compensatory Exercise Proposal Increasing the Performance of Free Pistol Sport Shooter
Růžička, Miroslav ; Fiala, Miloš (advisor) ; Hošková, Blanka (referee)
Název práce: Návrh vyrovnávacích cvičení ovlivňující výkonnost sportovního střelce v disciplíně libovolná pistole The Compensatory Exercises Proposal increasing the Performance of Free Pistol Sport Shooter Cíle práce: Na základě studia literatury a analýzy negativních jevů vyplývajících z nedostatečné pohybové aktivity a jednostranného zatěžování je cílem sestavení návrhu kompenzačních cvičení pro odstranění svalových dysbalancí pro sportovní střelce v disciplíně libovolná pistole. Metody: Vyrovnávací cvičení byla navržena na základě sběru informací, které byly získány z dostupné literatury. Taktéž bylo použito vlastních zkušeností z dlouhodobého působení ve vrcholovém sportu. Výsledky: Na základě rozboru negativních jevů ovlivňujících pohybový a opěrný systém střelce jsem sestavil návrh vyrovnávacích cvičení kjejich odstranění. Klíčová slova: střelba, libovolná pistole, svalová nerovnováha, stabilita, jednostranná zátěž
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Anti-immigration Attitude in Czech Music: Semiotic Analysis
Růžička, Miroslav ; Podzimek, Jan (advisor) ; Soukup, Martin (referee)
In my diploma thesis, I am reconstructing the anti-immigration attitude in Czech nationalist music production in the year 2016 in the context of the so-called European migration crisis. The sample consists of five selected music videos for nationalist protest songs reacting to the migration crisis and events connected to it. The thesis is based on the theoretical resources of social semiotics and the method of research is the multimodal semiotic analysis, which allows detailed research of the contents of complex communicates like music videos. In the theoretical part, I focus on acquainting the reader to the basics of semiotics, from where I gradually transfer to the school of social semiotics and their theories of modes and multimodality which represent the theoretical background for the analysis in the practical part. Next, I turn to clarifying the progress of the so-called European migration crisis in the years 2015 and 2016 which were crucial for the creation of these nationalist music videos. Also, I justify the choice of the sample and the analyzed themes. The practical part the contains the analysis of the selected music videos using the multimodal semiotic analysis considering three modes - the mode of speech, moving pictures and music. I decode the signs belonging to the pre-set themes....
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