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Analysis of General Polygon Boolean Operation Algorithms
Daněk, Tomáš ; Zemčík, Pavel (referee) ; Beran, Vítězslav (advisor)
This thesis deals with general polygon boolean operation algorithms. Boolean operations are e.g. intersection, union or difference. A general polygon can be e.g. a selfinterecting polygon with inner hole. Clipping of polygons against a rectangular window is probably the most familiar boolean operation on polygons. At first, basic definitions are listed. Then the principles of a selected set of boolean operation algorithms are reviewed. Finally, a complex comparison of the algorithms is undertaken. Performance as well as the ability to handle degenerate cases are tested. The output of this thesis is an overall evaluation of algorithm properties and a dynamic library that contains the implementation of all of the tested algorithms.
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Porovnání halogenových a xenonových světlometů z hlediska viditelnosti chodců
Bradáč, Albert ; Semela, Marek ; Škoda, Jan ; Sumec, Stanislav ; Kledus, Robert ; Bilík, Martin
This case study presents a comparison of visibility and recognisability (discernibility) of objects – pedestrians – on the road in rural areas at night on encounter with low beam headlights fitted with halogen lights and xenon (high-intensity discharge) lights in one and the same vehicle model. The study was inspired by the results of dynamic measuring of the reactions of vehicle drivers to the presence of pedestrians on the right side of the roadway, where the results indicated subsequent reactions of drivers driving a vehicle fitted with xenon discharge lights. The study is therefore concluded with a static comparison that confirms the factual findings.
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The Lighting Equipment Used in Modern Vehicles and the Measurement of the Range of Visibility of the Rear Lights
Belák, Michal ; Kropáč, František (referee) ; Vémola, Aleš (advisor)
This work is about lighting equipment of modern vehicles, its historical development, present condition and possibilities of its further progress and measuring of the range of visibility of the rear lights. First part is aimed at lighting equipment used in modern vehicles as a whole. It describes sources of light, their principle, construction, advantages and disadvantages. Next it deals with searchlights and other lighting devices, their gradual development, construction and modern solutions which are used in them, and also their future development. Second part of the work is aimed at characterization of ways of measuring the range of visibility used in practice, their possible application to measuring of the range of visibility of the rear lights and on proposal of presentive methodics for this measurement. Realization and interpretation of practical measurement by this methodics is included.
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Visibility measurements using lmk systém
Ciępka, Piotr ; Reza, Adam ; Unarski, Jan ; Wach, Wojciech
Based on the night measurements of unlit obstacles and background using the new LMK system, the authors calculated visibility parameters, i.e. luminance threshold difference necessary for recognise object during driving. The results of measurements were compared with other empirical investigations. A visibility studies procedure has been proposed, using the LMK system and a computer program, developed by the authors, for multi-parameter calculation of expected obstacle discernment distance. The procedure has been found particularly useful in complex road situations and atmospheric conditions.
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Fogs and runway visual range at the airport Brno-Tuřany
Tarasovičová, Nikola ; Třetina, Karel (referee) ; Krška, Karel (advisor)
This thesis deals with visibility and runway visual range, their messages in different meteorological reports, the methods of determining and phenomena, which worsen them. It focuses on fogs as the main cause of low visibility and discusses their origin, division and their impact on air traffic. Particular attention is paid to ways of determining visibility and runway visual range at the airport Brno-Tuřany and fogs at this airport. This thesis contains the results of statistical processing of fog in wind speed and direction and synoptic conditions, during the cold term of 2008/09 to 2012/13.
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The visibility identification on aerodromes in Czech Republic
Smetka, Adam ; Hudec, František (referee) ; Krška, Karel (advisor)
This work deals with the visibility and its breakdown by weather vocabulary. It discusses the development of RVR systems at airports in the Czech Republic, describes the measurement systems RVR MITRAS, MIDAS IV and history of selected airports. Other chapters describe the possible development of measurement techniques in RVR. The final section is devoted to the categories of runways.
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