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Web Browser Extension for Page Analysis
Navrátil, Rostislav ; Křivka, Zbyněk (referee) ; Burget, Radek (advisor)
The purpose of this thesis is to create a WebExtensions oriented module for a web browser. An extension module allows the user to submit details about the currently displayed web page and text content to a server application for thorough analysis and displaying the result. It is built on ExtensionAPIs, but is also supported in WebExtensions based web browsers. The communication between the extension module and the server is realized by XMLHttpRequest and the server application itself is implemented in PHP.
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Lossless Light Field Compression
Navrátil, Robert ; Šolony, Marek (referee) ; Bařina, David (advisor)
This thesis is focused on lossless light-field images compression, where it could be viable to extend common predictors into more dimensions. First chapter is regarding to essential theory about light-field images and 4D light-field, which is followed by description of every predictor and coder. With this is connected description of used compression pipeline. Last chapters contains description of solution and differences between every predictor result and theirs dimensional variant. At the end the results are compared with PNG. The result is that some 4D variants of implemented predictors have better compression rate than PNG.
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Detached house
Navrátil, Radek ; Struhala, Karel (referee) ; Jelínek, Petr (advisor)
The bachelor thesis is focused on a design for new-building of family house with an establishment of travel agency. The new building is placed in a cadastral area of the town Prostějov. The building is with two floors, without a basement and is designed for living of four persons with small travel agency, equipped with necessary accessories. Exterior walls are designed in the Ytong system and partly from a concrete blocks. Walls are insulated by contact thermal insulation. A ceiling strcuture is designed as a reinforced concrete slab. Building has a saddle roof. The bachelor thesis is formed as a project documentation.
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Use of Monovalent Copper for Sensitive Detection of Methyl Derivatives of Xanthine
Navrátil, R. ; Motlova, D. ; Jelen, F. ; Trnková, L.
This work is concerned with the electroanalysis of xanthine (Xan) and its methylated derivatives (1-, 3-, 7-, and 9-mXan) on a pencil graphite electrode in the presence of copper ions. The main idea of using copper consists in the in situ formation of the complex Cu(I)-mXan on the electrode surface and improvement of oxidative signals of the corresponding mXan during the detection. Linear sweep voltammetry (LSV) in connection with adsorption stripping techniques was used for the determination of mXan. To enhance the oxidation signals the elimination voltammetric procedure (EVP) was applied.
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Portfolio Management with Multiple Benchmarks
Navrátil, Robert ; Večeř, Jan (advisor) ; Pešta, Michal (referee)
Portfolio Management with Multiple Benchmarks Bc. Robert Navrátil Abstract: In this thesis, we study a maximal volatility portfolio that treats all assets in a symmetric way and related option contract. To preserve symmetry we need numeraire that treats all assets symmetrically. We choose market index with equal weights. In case of two assets we focus on a variation of a passport option on the portfolio. The optimal strategy for the investor is the mentioned maximal volatility portfolio. We extend the known optimal strategy for the option to a richer class of convex payoff functions. We also show a modification of the optimal strategy for maximizing the probability of ending above or at a desired level. We later extend the symmetric market model to case of three assets, which can be even further extended to an arbitrary number of assets. The three asset model requires more parameters than are observable from the data, however we show indistinguishably of the model on the choice of parameters under very natural conditions. Both numerical simulations and an application on real data is provided. 1
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Girsanov Theorem
Navrátil, Robert ; Šnupárková, Jana (advisor) ; Maslowski, Bohdan (referee)
Girsanov Theorem Bachelor's thesis - Robert Navrátil Abstract Modern theory of probability and financial mathematics require the theory of stochastic calculus. Its foundations contain Wiener process (Brownian motion) and the integral of stochastic process with respect to another stochastic process. This thesis deals with building the mathematical theory needed to construct the stochastic integral, with the construction itself, the Girsanov Theorem and its applications. The Girsanov Theorem uses equivalent probability measure to transform Wiener process with drift to Wiener process without drift. Using the Girsanov Theorem, we change our measure to the equivalent risk neutral measure and we deduce Black-Scholes formula which estimates the prize of European call option with underlying stock asset. The stock prize is modelled using the geometric Brownian motion. Finally, we demonstrate, on real life data, how this model works and what are its outcomes. 1
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Tests of statistical hypotheses in measurement error models
Navrátil, Radim
The behavior of rank procedures in measurement error models was studied - if tests and estimates stay valid and applicable when there are some measurement errors involved and if not how to modify these procedures to be able to do some statistical inference. A new rank test for the slope parameter in regression model based on minimum distance esti- mator and an aligned rank test for an intercept were proposed. The (asymptotic) bias of R-estimator in measurement error model was also investigated. Besides measurement errors the problem of heteroscedastic model errors was considered - regression rank score tests of heteroscedasticity with nuisance regression and tests of regression with nuisance heterosce- dasticity were proposed. Finally, in location model tests and estimates of shift parameter for various measurement errors were studied. All the results were derived theoretically and then demonstrated numerically with examples or simulations.
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Evaluation of activity potentional antimicrobial substances through the use of microdilution broth method
Navrátil, Radek ; Vejsová, Marcela (advisor) ; Konečná, Klára (referee)
Mgr. Radek Navrátil Evaluation of activity potentional antimicrobial substances through the use of microdilution broth method Rigorous thesis Charles University in Prague, Faculty of Pharmacy in Hradec Králové The aim of this thesis was to asses the antibacterial and antifungal activity of 49 substances prepared at the Department of organic and Inorganic chemistry, Faculty of Pharmacy of Charles University. According to their structural characteristics the substances were divided into six groups and tested through the microdilution broth method at eight strains of bacteria and eight strains of pathogenic fungi. The highest antibacterial activity was observed at the derivatives of 3-phenyl- 2H-1,3-benzoxazine-2,4(3H)-dithione against Staphylococcus aureus. The highest antifungal activity was shown by the derivatives of N-benzylsalicylthioamide against Absidia corymbifera. None of the tested substances presented efficiency against gramnegative bacteria. The replacement of the oxo group by thioxo group in molecule of 3-phenyl-4- thioxo-3,4-2H-1,3-benzoxazine-2-one led to a reduction of activity with exclusion at S. aureus. The replacement of hydrogen by halogene in molecule of 1,3-benzoxazine led to an improvement of activity. Further testing needs to be carried out to acquire definite results.
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Tests of statistical hypotheses in measurement error models
Navrátil, Radim ; Jurečková, Jana (advisor) ; Hušková, Marie (referee) ; Kalina, Jan (referee)
The behavior of rank procedures in measurement error models was studied - if tests and estimates stay valid and applicable when there are some measurement errors involved and if not how to modify these procedures to be able to do some statistical inference. A new rank test for the slope parameter in regression model based on minimum distance esti- mator and an aligned rank test for an intercept were proposed. The (asymptotic) bias of R-estimator in measurement error model was also investigated. Besides measurement errors the problem of heteroscedastic model errors was considered - regression rank score tests of heteroscedasticity with nuisance regression and tests of regression with nuisance heterosce- dasticity were proposed. Finally, in location model tests and estimates of shift parameter for various measurement errors were studied. All the results were derived theoretically and then demonstrated numerically with examples or simulations.
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Optimizing the calibration of the cameras of photogrammetric system designed for the measurement of rotationally symmetric forgings
Hurník, Jakub ; Navrátil, Robert (referee) ; Zatočilová, Aneta (advisor)
At present, there are only a few systems in the world, that allow measurement of the dimensional accuracy of hot forgings directly in the manufacturing process. This work deals with the development of the calibration method of the cameras for the developed photogrammetric system, intended for the mentioned purposes. The conditions of measurement are very specific - high temperature and large dimensions of measured semi-finished products, environment of heavy industry. Employed methods are chosen with the emphasis on reliability of the system, taking into account the demanding conditions in the industrial premises. Calibration is designed for a large field of view, utilizing coded reference points in a scene with known spatial coordinates. The result of the work is the calibration software created in the MATLAB environment.
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