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Human Powered Vehicle Differential
Andrlík, Ladislav ; Kloss, Ondřej (referee) ; Kaplan, Zdeněk (advisor)
The aim of this diploma thesis is the design of the differential of a road vehicle driven by a human force, intended for daily driving in the city with a focus on older users. The vehicle for which the differential is designed is strictly a pedal tricycle. The introduction of this thesis briefly outlines the history of pedal tricycles. The second chapter explains some technical terms relating to tricycles and bicycles in general. Further chapters of the research part describe the current structures of tricycles, the principle of a differential function in motor vehicles and design possibilities of the differential for pedal tricycles. The practical part of my work includes the design of a differential for pedal tricycle, the strength analysis of selected parts of the differential, drawings of the differential assembly, production drawings of selected parts and proposal of the torque transfer from pedals to the differential.
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Homotopické struktury v algebře, geometrii a matematické fyzice
Černohorská, Eva ; Markl, Martin (advisor) ; Somberg, Petr (referee)
Title: Homotopic structures in algebra, geometry and mathematical physics Author: Eva Černohorská Department: Mathematical Institute of Charles University Supervisor: RNDr. Martin Markl, DrSc., Institute of Mathematics of the Academy of Sciences of the Czech Republic, Mathematical Institute of Charles University Abstract: The aim of this thesis was to generalize the result that associative algebras on finite dimensional vector spaces can be described using differentials on free algebras. This result is limited by the duality of vector spaces. If we assume that the underlying space has a linear topology, then we can use the duality between discrete and linearly compact (profinite) vector spaces. To generalize the notion of an algebra, we need to recall the completed tensor product on linear vector spaces. Since this topics does not seem to be sufficiently covered by the literature, this thesis could serve also as a comprehensive text on linear vector spaces and their completed tensor products. We prove that also A∞ structures on linearly compact vector spaces could be represented by differentials on a free algebra. Keywords: Strongly homotopy associative algebra, linear topological vector space, Pontryagin duality, completed tensor product, differential
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Position of Minorities in the U.S. Labor Market
Svoboda, Jan ; Pertold-Gebicka, Barbara (advisor) ; Avdulaj, Krenar (referee)
This thesis deals with the phenomenon of racial discrimination in the U.S. labor market. The first part outlines the existing theories of discrimination and history of immigrants' residence in the U.S. It also brings some statistics from the U.S. labor market and finally reviews some literature in the field of labor market discrimination. The second part of the thesis is devoted to the empirical analysis of wage discrimination in the U.S. using the American Community Survey 1980 and 2007. With the help of Oaxaca-Blinder decomposition we break down the log-wage differential between whites and other racial groups into two parts. The first, explained, part is the part of the differential that can be explained by differences in average race characteristics. The other, unexplained, part is the part of the differential that remained unexplained. That part is then assigned as a result of discrimination. We find that while in 1980 Asians earned on average 5% more than whites, by 2007 this difference reached 15%. 15% - 21% of this difference remained unexplained. The opposite situation is observed in the case of Hispanics and Blacks. While in 1980 both, Hispanics and Afro-Americans, had on average 10% lower wage than whites, by 2007 this difference reached as much as 30%. In case of Afro-Americans, 50% -...
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Design and implementation of interconnection tools for noise generator
Pokorný, Jiří ; Kubánek, David (referee) ; Krajsa, Ondřej (advisor)
The bachelor’s thesis explores the way of implementation of interconnection of LFTX Daughterboard 0-30 MHz Tx and LFRX Daughterboard 0-30 MHz Rx cards from Ettus research and cards from Spectrum Digital. In the first part of the thesis the design of two tools for two way transmission is shown. The paper contains everything from the basic findings through parts selection nad simulations to the final production and testing of the tools. In the second part a way of controlling similar tool through USB is explored.
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Conception of terrain vehicles UTV
Máca, Jiří ; Vopařil, Jan (referee) ; Kučera, Pavel (advisor)
This review type bachelor thesis is dealing with conceptual solutions of Utility terrain vehicles. Individual chapters are describing main functional groups and different options of their construction. These options are analysed in terms of suitability for given application in utility and sport terrain vehicles, their manufacturing complexity and costs. Specific vehicles are mentioned only marginally.
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Formula Student Drivetrain
Odehnal, Jakub ; Svída, David (referee) ; Ramík, Pavel (advisor)
This master‘s thesis describes design of Formula Student Drivetrain, car evolution Dragon 4 and Dragon 5. There is shown an overview of the drivetrain parts used in category Formula Student. On that basis is made the new concept of drivetrain for the each car. Major focus is placed on the design of the differential mounting and chain tensioning mechanism. For the selected components was made stress analysis by FEM.
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Automatic Locking Differential
Kimlová, Anna ; Kučera, Pavel (referee) ; Blaťák, Ondřej (advisor)
This thesis consists of two parts. The first one contains a research about different kinds of divorces in tractors. There is also a description of a modelling in MATLAB, Simulink and Stateflow programs. The second part focuses on designing an algorithm of an automatic locking differential and connection front-wheel drive and its testing on a model of tractor. Furthermore the thesis solves an implementation process of the algorithm into the control unit.
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