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Guitar electron-tube amplifier
Kokolia, Martin ; Petržela, Jiří (referee) ; Kratochvíl, Tomáš (advisor)
The objective of this bachelor’s thesis was to design a low-frequency tube amplifier optimized for use with electric guitar. The preamp is equipped with ECC83 triode tubes as voltage amplifier and cathode follower for connection with a simple frequency corrector. The output of the FX loop allows the connection of external effects. The power amplifier is realized by dual-action 6L6 tubes and phase invertor with ECC81 triode. Output transformer allows impedance matching for speakers. The power supply uses a GZ34 rectifier tube and diode bridges. Text of thesis also includes theoretical design of guitar tube amplifier and documentation of realization of functional prototype.
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Local versus Global Sources of Competitiveness - case study of Czech outdoor firms
Vojáčková, Lenka ; Blažek, Jiří (advisor) ; Rumpel, Petr (referee)
The importance of innovation for competitiveness and economic development forms an important topic in current economic geography and related fields. At present, many authors are of the opinion that diverse networks of relations, connecting sources of competitiveness at different spatial levels are vital to a firm's competitiveness. With this thesis I hope to contribute to the understanding of the geography of relations crucial for the innovation and competitiveness of SMEs. I focus on Czech producers of outdoor equipment, which constitute a young, progressive and less-studied sector. I am especially interested in the location of strategic knowledge and the importance of various types of closeness in accessing such knowledge. In the Czech outdoor industry, a-spatial forms of proximity have greater significance. In contrast to international trade fairs, firms do not consider regional sources of competitiveness relevant. National and international social networks are important as well. The interconnection of formal and informal relations is very common in the outdoor industry as a significant number of entrepreneurs are members of the mountaineering or climbing community themselves. About 50% of these enterprises have moved their production to East Asia, where they are able to find cheaper labour as well as...
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Comparison of selected minority sports in the Czech Republic from the player, spectator and management aspects
Heteš, Jan ; Crossan, William Morea (advisor) ; Kotáb, Jiří (referee)
Title: Comparison of selected minority sports in the Czech Republic from the player, spectator and management aspects Objective: The aim of this work is to analyze the current situation in American football, frisbee and lacrosse in Prague and make suggestions for future improvements. Methods: The applied methods included the study of literature, collection of information, questionnaire examining players motivation and SWOT analysis. The research was conducted through surveys among athletes doing this sports. Results: Research has shown that the best prospects are waiting for frisbee, which benefits from minimum requirements for equipment and space. American football and lacrosse will probably never become mass sports, but using the above suggestions can improve their current position. Key words: amateur sport, american football, frisbee, lacrosse, SWOT analysis, motivation
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Accounting for long-lived assets in internationally accepted accounting systems
Oplt, Lukáš ; Krupová, Lenka (advisor) ; Kudrnová, Lenka (referee)
This work deals with accounting treatment of tangible and intangible assets in International financial reporting standards (IFRS). It illustrates main problems and various methods when accounting for assets. Where deemed appropriate it indicates the accounting treatment of US GAAP. First chapter is concerned with general description of accounting harmonization and the Framework of IFRS. Second chapter deals with IAS 16 -- Property, plant and equipment. Third chapter identifies main differences between IAS 16 and IAS 38 -- Intangible assets focusing on issues related to the special nature of intangible assets. Fourth chapter works with annual reports and comes out with a statistic of IFRS methods and procedures adherence.
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Calculation of the operating costs of the construction machinery
Šarlejová, Petra ; Ing.Jan Horalík (referee) ; Marková, Leonora (advisor)
This bachelor thesis is focused on a cost calculation for the operation of construction machine. Because this group is a signifiant volume of the total costs, and it affects not only the amount of profit but also the overall cost production, it is important to track these costs, especially in the construction companies that carry out the ground works or construction of roads. The next section carried out a calculation of prices of construction work, as well as a determination of rental billing rate of the equipment. Other area of research is to determine the overall performance of the track excavator under certain conditions and circumstances.
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Tribological behavior of detonation nanodiamond dispersed in lubricants
Dočekal, Martin ; Čermák, Jan (referee) ; Svoboda, Petr (advisor)
Currently tribological laboratories are looking for a new type of solid ingredients, to create a lubricating composition with minimal friction, heat resistant, with particles well dispersed in oils, sedimentation stable, improving the running properties and to minimize the concentration of solids. Nanodiamonds (DND) could exhibit the possible solution. These particles (in nanometers size) have very good physical and chemical properties, high hardness and resistance. The main advantages are effectiveness at low concentrations, compatibility with various types of oils or environmental safety (carbon additive, unlike metal) in a comparison with other types of additives. However, it is necessary to study these ingredients. The aim of research was to examine the influence of diamond nanoparticles on friction in a lubricated contact (elastohydrodynamic mode). Using tribological equipment, 3D optical profilometer and a microscope, we compared and evaluated using oil with diamond nanoparticles as well as without them. The research focused on the behavior of nanoparticles in contact and the effect they have on friction. To assess these properties of nanodiamonds, EHD optical tribometer was used (this is a device designed for the study of thin lubricating films). 3D optical profilometer and a microscope to assess the wear. And to determine the relationship between the coefficient of friction (COF) and time, Mini Traction Machine was used.
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