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Technological analysis of the usability of new thermosetting materials for the construction of headlamps
Rašner, Martin ; Kolář, Michal (referee) ; Píška, Miroslav (advisor)
The diploma thesis presents the usability of a new thermosetting material BMC for the construction of a car headlight. In the theoretical part there are described headlights, basic characteristics and properties of plastics focussing on polymer composite materials and material testing. The practical part deals with the processing of test samples for mechanical testing by compression moulding and also with the production of real samples of reflectors and carrier frames by injection moulding. The evaluation is based on comparison of the results of the performed tests of alternative material and the currently used BMC TETRADUR TD 492/2 in HELLA Autotechnik Nova s.r.o. Basic physical-mechanical properties such as strength, stiffness, toughness and hardness are tested and monitored. The reflectors and carrier frames are assembled into the headlight and then tested according to legal and customers´ requirements for climate and vibration resistance and photometry.
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Directional antenna for 60 GHz frequency band
Kratochvíl, Jakub ; Pítra, Kamil (referee) ; Láčík, Jaroslav (advisor)
The aim of this diploma thesis is to study the possibilities and problems of low-profile antennas and subsequently to design a directional antenna with spherical reflector for millimeter wavelengths. The theoretical part deals with basic information about horn and reflector antennas, and about SIW technology. In addition, the thesis deals with the specific design and modeling of the antenna using CST Microwave Studio. The simulated design achieved a sufficient bandwidth to cover ISM (57 GHz to 64 GHz) with gain 13.6 dBi at 60 GHz frequency. On fabricated antenna, the antenna impedance ratios were worse and the target bandwidth was not reached. Antenna gain was 14.33 dBi at 60 GHz frequency.
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Interpreting Narrative Techniques in Moby-Dick
Sedláček, Martin ; Procházka, Martin (advisor) ; Robbins, David Lee (referee)
Thesis Abstract The objective of this thesis is to map the narrative strategies of Herman Melville's Moby-Dick. By applying different narrative theories to Moby-Dick, it explores and assesses mainly the narrative reliability (Wayne C. Booth) and the narrative situation (Franz K. Stanzel). Ishmael is generally considered to be an example of an unreliable narrator and in this thesis manifestations of his unreliability are evaluated. Special attention is devoted to the inconsistencies in the narrative (e.g. recurring disappearances of Ishmael, shifts in focus on some of the characters, complete disappearances of other characters) and their treatment, taking the general academic consensus into account. Such phenomena are discussed as deliberately and consciously incorporated into the narrative, rather than being a result of a precipitated writing process. Apart from the formal inconsistencies, the narrative also includes incongruities of thematic nature (e.g. questionable value-scheme according to Rimmon- Kenan). By employing Stanzel's narrative theory, the thesis discusses Ishmael's oscillation between "narrator" and "reflector," with special focus on the dramatic chapters. Using both of these conceptions, Moby-Dick is assessed from two different perspectives, hopefully shedding some light on the complex...
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"The end of the Nylon age" novella from the year 1950 and its critical edition
Poledňáková, Barbora ; Špirit, Michael (advisor) ; Holý, Jiří (referee)
This diploma thesis deals with the novella The end of the nylon age written by Josef Škvorecký in 1950. It explores the text from a literary historical, literary theoretical and literary "practical", editorial point of view. After the introduction of author's work in necessary period and factual context the thesis focuses on the iterpretation of the novella, its narrative situation and the resulting structure of the text. The thesis then deals with dialogues and dialogic characteristics of the novella. The closing part pays attention to the textological issues - creating of an annotation system to the book. The novella is being related to other artist's work within each theme throughout the entire thesis.
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Design of projection illuminator
Přikrylová, Ivana ; Vacula, Daniel (referee) ; Antoš, Martin (advisor)
The aim of this diploma thesis is to design a suitable reflector concentrating a light beam into a circular hole in a gobo. The light beam behind the screen should have good efficiency and at the same time good homogeneity. For the reflector design and analysis a software for designing optical systems called LightTools was used. The reflector was designed by six different methods. Several smooth and several faceted reflectors were designed. The selected reflector was analyzed in combination with a varifocal lens. For selected reflector was designed mechanical store with respect to the anticipated operating conditions. This thesis serves as the basis for the producing of the reflector.
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Vertically polarized Yagi antenna with magnetic dipole
Weigel, Filip ; Pokorný, Michal (referee) ; Raida, Zbyněk (advisor)
This bachelor’s thesis deals with the principles of operation and simulation of planar Yagi antennas with a magnetic dipole. Simulation of electromagnetic field was performed in the simulator CST MICROWAVE STUDIO (CST MWS). The project compares results of simulations of several types of Yagi antennas. These antennas can be used for the communication along the living tissue (on-body communication).
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Placement Optimization of Projector Lens
Bezděk, Matěj ; Važík, Jiří (referee) ; Novotný, Pavel (advisor)
This diploma thesis deals with the creation of engineering design of holder of projector lens. The thesis is created in cooperation with department of development in Varroc Lighting Systems, s.r.o. Initial part provides a brief description of the development of lighting technology used in car´s headlamps. The following part describes solutions currently used in clamping the lens in holder. The main part of the thesis focuses on the design of holder of projector lens itself. Projector lenses testing provide critical values of cohesive failure of the lens material, which cannot be exceed during the process of lens fitting and its subsequent clamping. In the final part the engineering design is verified and optimized using finite element analysis.
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Optimum layout of pressing line for the production of reflectors at Automotive Lighting
Šťastný, Michal ; Hrbáček, Jan (referee) ; Kubík, Roman (advisor)
This thesis deals with optimization of a press line part for the manufacture of reflectors present at the Automotive Lighting Company, Jihlava. The first part focuses on describing the current workplace layout of the press line. The workplaces are located inconveniently and thus require a larger number of operators and a considerable amount of manual work. The second part of the thesis proposes layout solutions for the injection presses and for other machine parts. At the same time, a smoother transition design is proposed for the press line and for the manufacturing section that follows. Based on an evaluation of selected criteria, the optimum version is chosen, thereby adding to the efficiency of the molding process by reducing the number of operators required, by lowering the proportion of manual work relative to other activities, and by limiting the risk of poor quality. The conclusion of the thesis sums up the necessary investment costs and offers an economic assessment of introducing the selected press line arrangement to operation.
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Design of reflector antenna for special radar applications
Kačmařík, Ivo ; Oliva, Lukáš (referee) ; Lukeš, Zbyněk (advisor)
The aim of this bachelor’s thesis was to design small parabolic reflector antenna in program CST Microwave Studio and it’s execution and verifying of it’s parameters by the laboratory measurements. Basic demands were rational proportions of the antenna and it’s good electrical properties, especially optimization of impedance matching and directional characteristics.
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