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Optical Character Recognition
Bílek, Jan ; Žák, Pavel (referee) ; Zuzaňák, Jiří (advisor)
This work describes problems of optical character recognition and methods which are used to improve its results. It specializes in problems of image spam and its adjustment for its recognition. This work describes methods of processing an image which leads to better results of text recognition and also some methods used to the character recognition. There is also described a scheme and an implementation of a system which processes an image spam and detects a text within it.
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Aerospace - Futuristic Aircraft Cockpit Design
Bílek, Jan ; Bartoň, Radek (referee) ; Chudý, Peter (advisor)
This work describes the visualization design of the flight related quantities in a cockpit of a modern light sport aircraft. It focuses on the utilization of the state of the art trends in flight data displays and introduces the innovative implementation of the aircraft's energy state smart clues that reduce pilots' workload. The initial part of the work presents a research into the flight, engine and navigation data presentation on analog instruments, followed by their illustrative depiction in glass cockpits. Within the framework of this thesis, Microsoft Flight Simulator has been used as a source of the flight related data. Final advances in the display design were introduced through the implementation of the synthetic vision system and a visualization of the virtual tunnel in the sky.
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Modern video codecs
Bílek, Jan ; Čučka, Milan (referee) ; Číka, Petr (advisor)
This bachelor's thesis focuses on modern video codecs and its output video quality assessment. Firstly, principles of some objective and subjective assessment methods are explained. Afterwards, the most common video codecs are introduced, namely H.264, H.265, VP8, VP9, Dirac~2.2.3, WMV and Sorenson Spark. The outcome of this thesis is a desktop application named VideoCodecs written in C++ language, which uses ffmpeg library for encoding and decoding tasks. As a part of the application, algorithms PSNR, SSIM and M--SVD for objective video quality assessment were implemented. Furthermore, a simulation of transport channel was included, enabling us to bring errors into provided video. Using this application, video quality measurements were carried out, on four test sequences in HD resolution at several bitrates. According to our results, the best video codec regarding the video quality is H.265 before H.264, VP9 and VP8.
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Production Design of a Holder for Paddle Valve and Pressure Gauge
Bílek, Jan ; Harant, Martin (referee) ; Řiháček, Jan (advisor)
The bachelor thesis is focused on the design of a suitable manufacturing technology for a sheet metal holder for valve and pressure gauge control for buses. A 1.5 mm thick sheet metal roll was chosen as a semi-finished product. S235JR structural steel was selected as the optimum material. The production series was set at 150,000 pieces per year. After evaluating suitable production methods, the technology of sequential shearing and bending combined in a combined tool was chosen. In the proposed tool, the part will be produced in four steps from 11 rolls with 95.85 % utilization. The production will be carried out in a Mecânica Exacta eccentric press, model CC100, supplemented by a coil unwinding device.
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Avian influenza - global challenge
Bílek, Jan ; Čelko, Alexander (advisor)
HPAI A(H5N1) is an avian disease. There is some evidence of limited human-to-human transmission of the virus. A risk factor for contracting the virus is handling of infected poultry, but transmission of the virus from infected birds to humans is inefficient. Still, around 60% of humans known to have been infected with the current Asian strain of HPAI A(H5N1) have died from it, and H5N1 may mutate or reassort into a strain capable of efficient human-to-human transmission. Due to the high lethality and virulence of HPAI A(H5N1), its endemic presence, its increasingly large host reservoir, and its significant ongoing mutations, the H5N1 virus is the world's largest current pandemic threat, and a lot of money are being spent researching H5N1 and preparing for a potential influenza pandemic. At least 12 companies and 17 governments are developing pre-pandemic influenza vaccines, if it successful, could turn a deadly pandemic infection into a nondeadly one. Full-scale production of a vaccine that could prevent illness would require at least three months after the virus's emergence to begin.
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Chiral separation of diquats and determination of stability constants of their complexes with cyclodextrins by capillary electrophoresis
Bílek, Jan ; Kašička, Václav (advisor) ; Jelínek, Ivan (referee)
Capillary zone electrophoresis was used for chiral separation of eleven diquat derivatives. These N-heteroaromatic dications containing structural motif of 2,2'-bipyridine have recently been studied for their interesting electrochemical properties as well as for the axial chirality of their molecules. The combination of these properties could potencially lead to interesting applications in the future. For enantioseparation of diquats (DQ) commercially available randomly sulfated α-, β-, and γ-cyclodextrins with high degree of substitution were used. A succesfull chiral separation was achieved using all of the three sulfated cyclodextrins as chiral selectors (CS). Baseline enantioseparation was achieved for 82 %, 91 % respectively 100 % of the analyzed DQ in the presence of HS-α-CD, HS-β-CD, HS-γ-CD respectively. The highest separation efficiency and resolution were obtained in the backround electrolyte containing 22 mmol/L NaOH, 35 mmol/L H3PO4 (pH2,5) and 6 mmol/L HS-β-CD. Using three available nonracemic DQ an identification of the particular M- and P-enantiomers was done for the three corresponding DQ structures. Apparent stabillity constants of complexes of the DQ derivatives with above mentioned cyclodextrins as CS were determined by means of capillary affinity electrophoresis. The stability...
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Vliv různých způsobů ozelenění vinice na příjem živin
Bílek, Jan
This diploma thesis has been developed at the Faculty of Horticulture Mendel University in Brno, at the Institute of viticulture and winemaking in Lednice. The thesis deals with the influence of different plant mixtures in the interfaces of vineyard for the intake of nutrient by grapevine. The literary part of the thesis provides an overview of significance of the planting for vineyards, sowing and treatment of the plants. Further the literary part contains description of individual families and plants and indicates in which vineyards are specific plant mixtures usable. The experimental part examines three different plant mixtures and their influence on the intake of macroelements and microelements by grapevine. The experimental part further indicates the parameters of the grapes selected from each plant mixtures
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