282,034 research outputs found

    SIW-Based Circularly Polarized Antenna Arrays

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    Tato disertační práce prezentuje nový koncept kruhově polarizovaných anténních řad na bázi vlnovodu integrovaného do substrátu. Hlavní devízou konceptu je modularita, kdy je základní stavební blok řady použitelný pro tvorbu komplexnějších řad a tento blok zároveň slouží jako šablona pro návrh komplexnější struktury. Anténní řada byla simulována a experimentálně ověřena pro frekvence 17 a 60 GHz. Na základě dosažených výsledků byla odvozena metodologie pro návrh a identifikovány klíčové oblasti návrhu. Následně práce představuje techniku zvýšení šířky pásma osového poměru kruhově polarizovaných anténních řad pomoci parazitních flíčků, které jsou umístěny nad zářiče v definované vzdálenosti. Anténní řada z první části práce byla použita v simulacích a experimentálním ověření pro frekvence 17 a 60 GHz, kdy byla tato řada rozšířena o parazitní strukturu, přidávajíc další vrstvu modularity do konceptu.This dissertation thesis presents a new concept of SIW-based circularly polarized antenna arrays. The main property of the concept is modularity where the base building block can be utilized to create more complex antenna arrays and at the same time it serves also as the template to design the more complex structure. The antenna array was simulated and experimentally verified for the frequencies of 17 and 60 GHz. Based on the obtained results, design methodology was derived, and key design areas were identified. Next, the thesis introduces a technique of increasing axial ratio bandwidth of circularly polarized antenna arrays by utilizing parasitic patches, which are placed above the radiating elements at defined distance. The antenna array from the first section of the thesis was used in the simulations and experimental verification for the frequencies of 17 and 60 GHz, where this array was extended with the parasitic structure, adding another level of modularity into the concept.

    The Fight against Doping in Sport in Interaction with European Union Law: Proportionality of Ineligibility and Anti-Doping Education

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    Dissertation: The Fight against Doping in Sport in Interaction with European Union Law: Proportionality of Ineligibility and Anti-Doping Education Author: JUDr. Jan Exner This dissertation researches the interaction between the fight against doping in sport and the law of the European Union. It particularly analyses whether the World Anti-Doping Agency and other anti-doping organizations respect the proportionality of ineligibility for doping and related role of anti-doping education. The findings of this dissertation demonstrate that anti-doping organizations have crossed the borders of their conditional autonomy and good governance under European Union law through breach of the proportionality of ineligibility in interaction with anti-doping education. In particular, it concludes that they underestimate the role of education as an anti-doping element, which interacts with proportionality of ineligibility. Anti-doping education raises awareness, informs, communicates, instills values, and develops life skills and decision-making capability to prevent intentional and unintentional doping and its consequences, including a potentially disproportionate ineligibility. As such, it also enables the deterrence effect of anti-doping rules and sanctions. On top of that, the level of anti-doping education is..

    Information System Assessment and Proposal of ICT Modification

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    The aim of the diploma thesis is to evaluate the state of the reporting system in the selected company. Based on the analyzes of the current system, possible areas for improvement will be identified. Subsequently, possible solutions will be proposed for streamlining processes, the method of their implementation, and the thesis will evaluate their benefits, risks and measures to reduce them

    System for automatic size and type control of cars rims

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    At the end of every automotive assembly line, there is a quality control process where factory workers check produced cars for potential defects. The computer vision field, especially neural networks for images, have great potential to complement human staff in order to produce as safe and reliable cars as possible. In this thesis we focus on the validation, whether all four wheels on a single car match in size and type. We introduce and experiment with both neural networks and traditional computer vision techniques. The approach we use is to first detect the car then classify its wheels and try to estimate their size. In the end we build a functional prototype of the system that is running in real-time. The data for this thesis were recorded in Škoda Auto factory in Mladá Boleslav in cooperation with the company.

    Financing of Business Activities

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    This bachelor thesis is focused on the financing of business activities, specifically on the financing of fixed assets, a car for a supplier company. The theoretical part of the work is focused on professional literature search and explanation of basic concepts. In the analytical part, strategic and financial analysis of a specific company is performed. The practical part is focused on the introduction of a specific subject of financing and the subsequent proposal of its most suitable method of financing

    Comparative Analysis of Multi-model Databases

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    BACHELOR THESIS ABSTRACT Eldar Guliyev Comparative Analysis of Multi-model Databases The thesis is devoted to performance analysis of multi-model database management systems. Data models, multi-model DBMS and query languages were studied. Based on comparison of existing database benchmarks and multi-model DBMS functionality, requirements to the benchmarking process were identified. For the performance benchmarking, a cross-platform benchmarking application with graphical user interface was designed and implemented. The benchmarking application has a plugin architecture giving the possibility to create a DLL-plugin and test a DBMS which is not supported in the initial release. ArangoDB, RavenDB and MongoDB were tested with focus on document and graph data models

    Analysis of photon data from neutron capture on 170Tm

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    The subject of this thesis is to study modes of γ decay of 170 Tm; knowledge of quan- tities describing γ decay form an important step in understanding an atomic nucleus. A description of γ decay of excited states of a heavy atomic nucleus above excitation energy of a few MeV is usually performed within the statistical model using the level density and photon strength functions. There have been numerous attempts to introduce models for these quantities, however, there are still contradictions with experimental data. This thesis focuses on analyzing experimental data from γ decay of excited 170 Tm nucleus formed by a slow neutron capture on 169 Tm. Specifically, the so-called sum-energy and multistep γ cascade spectra were prepared and the impact of several parameters used in the data processing was tested. The γ rays emitted from the radiative neutron capture were detected with a highly-segmented high-efficiency scintillation detector DANCE at Los Alamos National Laboratory. The full analysis is then completed by comparing the experimental data with predictions based on various level density and photon strength functions models. The whole process is very complex and its first step is a conversion of raw data to the form that can be compared with simulations, which is the subject of this thesis.

    Functional equivalence in the film adaptation of Ian McEwan's Atonement

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    The aim of this diploma thesis is the analysis of the film adaptation of Ian McEwan's novel Atonement that was directed by Joe Wright and written by Christopher Hampton in 2007. The thesis focuses on the instances of functional equivalence in the film. The thesis is divided into two parts. The theoretical part elaborates on the phenomenon of functional equivalence and briefly discusses the main approaches to film adaptations. The practical part examines individual examples of functional equivalence in the film, describes and analyses corresponding passages in the novel and scenes in the film. It describes the scenes in which Hampton introduces the characters with special attention to the changes that were made to fully do so and then inspects the other segments of the film that were transformed to seamlessly transfer the adapted material to screen. Keyworrds Film, adaptation, novel, equivalence, scene, passage, theme, narratio

    Revitalization of the Small Water Reservoir in the Skalička u Hranic Cadastral Area

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    The aim of this paper is to propose a comprehensive revitalization of the side pond in the cadastral area of Skalička. As part of revitalization measures, the removal of mud from the pond, fortification of the banks and other modifications in connection with functional structures are proposed. In order to take water into the pond, a concrete diversion structure in the Hlubocky stream bed is designed, connected with pond via open canal with 2 pools, which will substitute the existing supply pipeline. As part of stabilization of the streambed and to overcome height difference, a boulder chute with stilling basin and related modifications are designed. The introductory part is a summary of knowledge from the issue and it explains important terms, historical context and description of basic principles. The next part describes the current situation and conditions in the surveyed locality. The following is a description of the methods and programs that were used for this work. The design part presents the proposed revitalization measures. An essential part of the work is also the varification of the proposed modification in the streambed, using 3D digital terrain model in Atlas DMT and subsequent 1D flow simulation in HEC-RAS

    Low-energy building for education in Hradec Králové

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    The aim of the master project is to design nearly zero-energy university building in Hradec Králové. The thesis consists of three parts, architectural-construction part, building services and energy assessment report to a photovoltaic power plant. The building has two above-ground floors and a basement under part of the building. In the basement there is utility room and storage. On the first floor there is entrance hall, sanitary facilities and locker room. On the second floor there are two lecture halls and office rooms. The vertical load-bearing structures are designed as a reinforced concrete frame system. Horizontal load-bearing structures are designed as prestressed panels. The building is insulated with expanded mineral wool. There are solar panels situated on the flat roof over the second floor. The building is heated by heat exchange station and the whole building is ventilated by two air conditioning units. The main part in my master project is energy assessment report to a photovoltaic power plant. The project is carried out in ArchiCAD and HelioScope software
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