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Least-Squares Method in System Identification
Matějka, Jiří ; Bělohradský, Petr (referee) ; Máša, Vítězslav (advisor)
This bachelor thesis deals with the description of the least squares method and its application in system identification of dynamic processes. It contains mathematical derivation of least squares method and basic principles of system identification. It describes parametrization of an mathematical model of experimental unit for biomass combustion.
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Side channel attacks on chip cards
Matějka, Jiří ; Morský, Ondřej (referee) ; Martinásek, Zdeněk (advisor)
This master thesis deals about the issues of chip cards’ side channels. Side channels are new method in cryptanalysis. Unlike classical cryptanalysis, which looks for weaknesses of mathematical structure of algorithms, side channel’s analysis use weaknesses of physical implementation of these algorithms. First part describes chip cards, their usage a security. There is mentioned the issue of cryptographic algorithms and their implementation on smart cards. There are described well-known side channels and examples of their abuse. Practical part of this thesis is focused on a proposal of a laboratory task, which demonstrates power-based side channel attack on smart card. There is designed laboratory workplace for this task, software for measurement and analysis is implemented in development tool LabVIEW. In the last part is this attack realized, the target of this attack is a standard SIM card.
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Proposal of company´s E-marketing
Hadrava, Martin ; Matějka, Jiří (referee) ; Dvořák, Jiří (advisor)
Thesis contains the basic theoretical resources for processing e-marketing of company; it offers two options of problems solving proposals. The first option contains basic web presentation with SEO optimalization. The second option, which is superstructure of the first one, is enriched by advertising activities on internet, which direct the user to the visiting of websites. These suggestions are consequently evaluated from the economical point of view.
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GPG Encrypted Web Pages
Matějka, Jiří ; Pluskal, Jan (referee) ; Polčák, Libor (advisor)
Cílem této práce je navrhnout a implementovat způsob zabezpečení citlivých dat na veřejných serverech nebo serverech třetích stran. Práce se zabývá implementací rozšíření pro webový prohlížeč Mozilla Firefox, které bude schopno nalézt a dešifrovat zašifrované prvky webové stránky s využitím výstupů GnuPG projektu. Rozšíření musí být dále schopno zpracovat dynamické změny webové stránky způsobené použitím XHR API, Fetch API, či Push API. V neposlední řadě se práce zabývá testováním implementovaného řešení a měření vlivu rozšíření na celkovou dobu zpracování webových stránek prohlížečem.
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Information System for a Learning Center
Chmel, Marek ; Matějka, Jiří (referee) ; Koch, Miloš (advisor)
This thesis is aimed at the usage of PHP language and MySQL database system towards the creation of information system for a learning center. A deep analysis is performed before the design of an application together with the database structure, which is appropriate for the environment. An increased emphasis is laid on security and easy expansibility of the application in this analysis. Further on is described the design phase of the application and all the problems that came up. In the end of this work are listed possible extensions and improvements of this application.
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Lumbar spinal stenosis: changes in the fibrous structures of the posterior spinal column and the rule of the ligamentum flavum
Ježek, Jakub ; Krbec, Martin (advisor) ; Chaloupka, Richard (referee) ; Matějka, Jiří (referee)
The dissertation is focused on lumbar spinal stenosis (LSS), because it is a serious desease, that primary affects elderly patients and which often leads to disability. Because the pathophysiology or feasible prophylaxy is not yet fully understood, the first part of the thesis is devoted to the ligamentum flavum (LF), whose changes (hypertrophy and degeneration) are one of the main factors leading to LSS. We focused in this experimental part on changes in the LF properties that could cause its degeneration and hypertrophy - changes in vascularization (investigated as vascular density - Lv), the presence of inflammatory changes and the occurrence of chondroid metaplasia, and then to clarify changes in the LF mechanical properties (stiffness). Vascular density analysis of degenerated and healthy human LF combined with measurement of micromechanical properties was performed. It was found that Lv changes were not dependent on the degree of LSS but were age dependent, that is, LF vascular density declines up until 50 years of age and thereafter changes very little. A significant increased incidence of chondroid metaplasia and clear signs of inflammation in LSS patients were found out. LF samples from LSS patients showed significantly lower stiffness in comparison to samples of healthy patients. The...
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BRDF workshop
Matějka, Jiří ; Pelikán, Josef (advisor) ; Karlík, Ondřej (referee)
This thesis develops an application for interactive experiments with BRDF functions. Arbitrary BRDF function may be specified with an analytic formula, including arbitrary number of parameters. A simple scene is displayed, using specified BRDF. The parameters can be modified which has an immediate impact to the scene's appearance. The application can utilize a programmable GPU for high speed of rendering.
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Lighting workshop
Matějka, Jiří ; Pelikán, Josef (advisor) ; Horáček, Jan (referee)
The object of this work is to design and implement an application for interactive experiments with local illumination models. The user can arbitrarily define an illumination model with mathematical formulas and mark certain parameters to be changeable. While such parameters are changed, the program smoothly draws an updated 3D scene. The scene can be defined in the text format, while several scenes are bundled with the program. Two predefined well-known illumination models are also bundled with the program - Strauss' and Phong's model.
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