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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
91

Vliv polohy reproduktorů na charakteristiky reproduktorové soustavy / Influence of drivers position on the characteristics of the loudspeaker system

Bičan, Jan January 2021 (has links)
This thesis deals with the measurement and description of properties of the two-way variable modular loudspeaker system marked as OM-3, especially the influence of the mutual position of drivers on its characteristics. The thesis examines individual factors taking their contribution on characteristics of the loudspeaker system in total. Further it measures and evaluates options of compensations of mutual position changes of drivers using an all-pass filter. Within this thesis is also included laboratory task preparation which is focused on this problematics.
92

Měření dynamických charakteristik zpětných armatur / Measurement of dynamic characteristic of check valves

Novák, Jan January 2017 (has links)
Master thesis presents overview of existing types of check valves, their features, uses and issue called "cracking". Experimental part of this thesis focuses on the lift and swing check valves. Results of the measurement are evaluated from non-stationary flow point of view by developing and analyzing static and dynamic characteristics. This thesis takes into account losses and dynamic effects as main viewpoints. Two methods for measuring non-stationary velocities are used. Direct method called Gibson and indirect method laser doppler anemometry. Goal of the master thesis is to increase understanding of the check valves and their applicability.
93

Elektrické vlastnosti nanostrukturovaných povrchů TaxOy pro kapacitní aplikace / Electrical properties of nanostructured TaxOy for capacitive applications

Nováková, Tereza January 2017 (has links)
Cílem diplomové práce bylo nastudovat a popsat mechanismy transportu náboje v tantalovém kondenzátoru. Práce obsahuje stručný teoretický úvod do problematiky kondenzátoru jako součástky a dále se zabývá jednotlivými mechanismy přenosu náboje jako je ohmická, Poole-Frenkel proudová, Schottkyho, tunelovací a emisní složka a také proudem prostorového náboje. V experimentální části byly měřeny ampér-voltové I/V, ampér-časové I/t a impedanční charakteristiky, jejichž data byla následně zpracována pomocí např. Mott-Schottkyho analýzy a byly vyhodnoceny elektrické parametry jako je aktivační energie, koncentrace dopantů, akumulační kapacita nebo potenciálová bariéra. Výsledky, vypočtené veličiny a naměřené hodnoty jsou diskutovány.
94

Modulární systém pro měření charakteristik dvoupásmových reproduktorových soustav / Modular system for measuring the characteristics of two-way loudspeaker systems

Pešek, Marko January 2019 (has links)
This master's thesis deals with design and implementation of modular system for two-way loudspeaker system's characteristics. Work focus mainly on the enclosure geometry and speaker placement. The individual modules of the system were designed and then implemented. Furthermore, the characteristics of these modules were measured and laboratory tasks using these modules were elaborated.
95

Náhradní zapojení asynchronních strojů / Substituting circuit of an induction machine

Běloušek, Radim January 2011 (has links)
Although induction motors are the simplest and most working reliability machines, is the identification of the parameters of their substituting circuit very difficult. There is solved the identification of the parameters of the substituting circuit in the T-network and ? –network in this work. The work also includes the proposal of magnetic circuit of the induction motor, the calculation of magnetizing and leakage inductances and resistances of the machine. The conclusion of the work is devoted to the sensitivity analysis of current and torque characteristics of induction motor upon the change of the single parameters of the substituting circuit.
96

Analýza týmového herního výkonu basketbalové reprezentace ČR na mistrovství Evropy 2013 ve Slovinsku / Analysis of team game performance of basketball representation of the Czech Republic at the European Championship 2013 in Slovenia

Hering, Albert January 2014 (has links)
Title of Work: Analysis of team game performance of basketball representation of the Czech Republic at the European Championship 2013 in Slovenia. Objectives of Thesis: The main goal of our work is to compare team game performances of Group C and compare the final results of the Czech Republic representation in detail with its rivals at the European Championship in 2013. Partial target is a comparison of average merits between groups of teams which made it to the second round of the tournament of the European Championship 2013 which didn't succeed. Methods of Work: The chief method of the writing was a quantitative analysis of video records of all of the games of Group C, European Championship 2013 with detailed final results of the Czech Republic and its rivals. While using the method of observation, we registered the characteristics of the games and then compared it within the participating teams. In the second part, we compared the final results of pointers of the moving teams to the qualification and teams which didn't' succeed in Group C, European Championship 2013 in Basketball. Results of Work: Based on our work, we found out that the Czech Republic Team presented itself at the European Championship 2013 with different performance in individual games. The basic element of the Czech Team was...
97

Porovnání tréninkové přípravy skibobistů a lyžařů v Jablonci nad Jizerou / Comparison of training preparation skibobbers and skiers in Jablonec nad Jizerou

Havlíček, Jan January 2010 (has links)
Title of the thesis: Characterization of training of skibobbers in Jablonec nad Jizerou Aim of the thesis: The aim of the thesis is to characterize a training plan throughout a whole year, to learn the training difficulties during various periods and to show differences and similarities with training plans of skiers. Methods: Search of literature focused on training of skiers a learning of biomechanical aspects of ski-driving. There is a very few pieces of literature dealing with skibobs. Therefore most of the information is gain from trainers in Jablonec nad Jizerou, especially from the current representation trainer. The training plans of skier and skibobber are completed from available sources (interview, notes). Training analysis and their differences were done by deductive analysis. Results: Characterization of training units of skibobber and skier is very similar. The differences were found in training composition where in case of a skibobber there is more emphasis laid on strengthening his or her arms. This kind of training is also more frequent than in case of a skier. Thanks to more bicycles training and motion activities for strengthening arms. Skibbobers have also more frequent participation in various races. However, this depends on individual efficiency. Key words: skiers, skibobbers,...
98

Opylování rostliny Clusia blattophila: kvalitativní a kvantitativní parametry vztahu mezi rostlinou a opylovači / Pollination of Clusia blattophila: Quality and quantity components of the plant-pollinator system

Pinc, Jan January 2015 (has links)
This work discusses the pollination system of Clusia blattophila on the Nouragues inselberg in the central part of French Guiana. The pollination system is unique, because one of the pollinators is probably a cockroach species, Amazonina platystylata. It is the third, and the last known case of cockroach pollination. Flowers are also visited by crickets (Gryllidae), flies (Diptera) belonging to the families Hybotidae, Cecidomyiidae, Dolichopodidae, and some other arthropods. This work deals with the effectiveness of the pollination system and its two components. The quantitative component of the pollination effectiveness is characterized by the number of visits and visit duration. A qualitative characteristic of pollination is characterized by the number of pollen transferred by individual pollinator. To determine quantitative characteristics, ca. 450 hours of recordings were taken. From the recordings, it is apparent that cockroaches and dipterans occur on flowers more frequently, and also that cockroaches and crickets spends on flowers more time. To determine the quantitative characteristics, pollen load on stigma and insect was determined and an exclusion experiment was performed when only some floral visitors were allowed to touch the flowers. All experiments confirm that cockroach Amazonina...
99

Inovační politika Brazílie a její dopad na vývoj brazilského zahraničního obchodu / Innovation policy of Brazil and its impact on Brazilian foreign trade

Drda, Vojtěch January 2010 (has links)
This thesis aims to analyze the Brazilian innovation policy and its impact on country's foreign trade. The first chapter features an introduction to the innovation policy and a general economic overview of Brazil. The second chapter analyzes the main indicators of the Brazilian innovation system. The third chapter explains the government's innovation policy and the specific measures to boost innovation activity within the country. The fourth chapter analyzes the exact influence that the Brazilian innovation policy has on the country's foreign trade.
100

Úloha marketingu v rozvoji obcí Křivoklátska / The role of the marketing in the development of municipalities in Krivoklatsko region

Malátová, Aneta January 2007 (has links)
Diploma thesis discusses the importance of marketing in municipal development of the area. Currently, community leaders underestimate the importance of Urban marketing and they confuse the term municipal marketing for a mere regional publicity. Municipal marketing is not just communication and advertising, but it is a complex tool for managing the municipality. The thesis is divided into theoretical and practical parts. The theoretical part deals with the definition and determination of municipal marketing and its instruments. For appropriate usage of municipal marketing is also necessary to know its processes, products and approaches. The practical part includes an analysis of natural and socio-economic environment of Křivoklátsko region, and also it relates barriers and trends in development of municipal marketing. Understanding the background of certain municipality is essential for creating quality marketing strategy, which should take part in every strategic plan of area development.

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