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Freezing
Ševčík, Andrej ; Chrobák, Ondřej (referee) ; Kvíčala, Petr (advisor)
The subject of diploma thesis is cycle of paintings, animation and video. This work is based on the operation system error. I focusing on well know phenomen of freezing computer and follow layering of system windows over themselves. Due to an error may arise aesthetic shape, which may refer to geometric abstraction. On this phenomenon interested me especially the elementary aspects of painting, building space on surface, geometry, movement and shape.
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ANSI art
Novák, Vlastimil ; Slaný, Karel (referee) ; Vašíček, Zdeněk (advisor)
The present bachelor thesis deals with automatic generation of ASCII graphics. The thesis is divided in several parts. First part describes the basics of computer graphics, image processing and recognition. The next part is focused on a theory and history of two most famous art styles called ASCII art and ANSI art. The methods of char recognition and problems arising from their testing are described in software application design. The methods reducing colour space of analyzed area were designed for char foreground and background colouring. The semifinal part is focused on implementation of library generating ANSI and ASCII art image and software application enabling the setting of all necessary parameters. The testing on a series of images, evaluation of results reached during the development and suggestions of possible future extensions are described in last part of the thesis.
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File Synchronization on 3 or More PCs
Nykrýn, Lukáš ; Michlovský, Zbyněk (referee) ; Jurnečka, Peter (advisor)
This document descripes the design and implementation of application for file sharing between multiple computers using an external drive. Application can be run on GNU/Linux and MS Windows. In Windows application performs synchronization at regular intervals. Under GNU/Linux offers extra choice to watch the status of files and immediately synchronize file after change. The whole system monitors and cares for all possible collision states of files that can arise.
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Preparation for the implementation of documents and records management in the public sector organization
Obr, Pavel ; Švecová, Lenka (advisor) ; Hofrichter, Kamil (referee)
This master's thesis deals with documents and records management using the computer information systems in the Enterprise Content Management. The thesis explains basic terms relating to the implementation of information systems and incorporates such systems into the structure of enterprises information systems. Further it describes all main features of currently used systems for the Enterprise Content Management and it explains the fundamental legislative aspects of operation of such information systems. The second part of this thesis practically prepares the implementation of the Enterprise Content Management System in a specific organization of the public sector. The preparation of the implementation is performed from the initial analysis of processes in the organization to the definition of requirements on a specific information system. The knowledge of benefits from the use of an information system in an organization is the precondition of an effective use of such an information system in documents and records management and that is why this thesis proposes a method for measuring of benefits arising from the use of document and records management system in the organization.
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Statistical Physics of Hard Optimization Problems
Zdeborová, Lenka ; Janiš, Václav (advisor) ; Mertens, Stephan (referee) ; Zecchina, Riccardo (referee)
Optimization is fundamental in many areas of science, from computer science and information theory to engineering and statistical physics, as well as to biology or social sciences. It typically involves a large number of variables and a cost function depending on these variables. Optimization problems in the NP-complete class are particularly dicult, it is believed that the number of operations required to minimize the cost function is in the most dicult cases exponential in the system size. However, even in an NP-complete problem the practically arising instances might, in fact, be easy to solve. The principal question we address in this thesis is: How to recognize if an NP-complete constraint satisfaction problem is typically hard and what are the main reasons for this? We adopt approaches from the statistical physics of disordered systems, in particular the cavity method developed originally to describe glassy systems. We describe new properties of the space of solutions in two of the most studied constraint satisfaction problems - random satisability and random graph coloring. We suggest a relation between the existence of the so-called frozen variables and the algorithmic hardness of a problem. Based on these insights, we introduce a new class of problems which we named "locked" constraint...
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Functional data and their principal components analysis
Kasanický, Ivan ; Hlubinka, Daniel (advisor) ; Hušková, Marie (referee)
Presented thesis deals with analysis of functional data. In the first part, problem which arises because of only finite possible numbers of observations is discussed. This problem is solved using representation by basis functions with emphasis on B-splines basis. The second part is focused on functional principal component analysis that could be understood as a natural extension of a multivariate case or as an application of Karhunen-Lo`eve expansion , which is based on Mercer's theorem. Estimations of principal components together with rates of convergence are mentioned too. Practical computation of principal components is mentioned in the last chapter.
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The knowledge of the population of the Czech Republic about the radiation risks resulting from accident at the Chernobyl Nuclear Power Plant.
JAROŠ, Luboš
The Chernobyl disaster is still considered to be one of the biggest catastrophic accidents in the history of nuclear energetics. After the explosion of the nuclear reactor, abundance of radioactive substance escaped to the atmosphere and in the shape of the radioactive cloud affected even the area of the former Czechoslovak Socialist Republic. Political parties and state authorities reacted on this situation by setting up the state committee, which under political pressure intentionally concealed the information about the risks and consequences of the disaster for the Czechoslovak population. The collapse of the regime not only revealed the crisis of the mistrust to the official sources of information, but also improved the effort of getting information from unofficial and, according to regime, illegal sources. The Chernobyl disaster also caused the mistrust to nuclear energetics. Therefore construction and initiation of the Temelín nuclear power station elicited the interest to the information about The Chernobyl disaster. I have decided to authenticate in my thesis, how well the residents of the Czech Republic are familiar with the Chernobyl disaster and how objective their knowledge about the radiological risks arising from the Chernobyl disaster at present are. I found out the state of the foreknowledge of the residents of the Czech Republic about the radiological risks arising from the Chernobyl disaster by means of questionnaires, where 200 respondents were interviewed. For more detailed research, I divided the residents of the Czech Republic into two groups. The first one consisted of the inhabitants that live in the zone of the disaster preparedness of the Temelín nuclear power station and comprise one half of respondents. The second group consisted of the inhabitants that live of the zone of the disaster preparedness. I drew up questions in the questionnaire in order to include the given problems completely ? from the knowledge about the risks arising from the disaster and emission of the radioactive substances to their consequences for human?s health and the way of reduction their impacts on the population of the Czech Republic. I evaluated the answers from the respondents to the single answers and drew up the tables. I accomplished them by the percentage evaluation of the right and wrong answers, computation of total mean of the achieved points and the total percentage success rate. The evaluation of the knowledge of the respondents of the Czech Republic was accomplished on the basis of the value of total mean of the achieved points and percentage success rate. I did a statistical evaluation by testing normality using ?2 Pearson's chi-squared test. The mutual comparison of the knowledge I did by testing by means of the two-sample t-test on the basis of the guess of the empirical parameters from each group. On the basis of this evaluation of the results of the questionnaire I can declare that the knowledge of the residents of the Czech Republic about the radiological risks arising from the Chernobyl disaster are at a very good level. The results also proved that inhabitants of the zone of the disaster preparedness of the Temelín nuclear power station have greater knowledge about the radiological risks arising from the Chernobyl disaster than the rest of the Czech Republic. It can be observed in the conclusion that all predetermined aims were successfully achieved and the results of the questionnaire also proved the assigned hypothesis.
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Applications of the fingerprint sensing in IT
Rakár, Peter ; Balada, Jakub (advisor) ; Kulovaný, Martin (referee)
The biometrics is a branch with long history. With the arrival of information technologies biometrics also penetrates onto the field of the computer science. Even if there have been specialists concerned with application of biometrics in informatics for decades, state of the biometric technologies does not provide hundred percent reliability. Biometrics in IT is still evolving and with improving technologies from other spheres of the human activity new challenges also arise in biometrics. Biometry of fingerprint is the most common and the most used biometry in practice. The aim of this work is to bring the problem of fingerprints sensing and recognition closer to the reader. Work describes individual characteristics of fingerprints as well as common aspects of all other biometrics. Next concern of the work is the application of fingerprints biometry in practice. It is closer concerned with the most common methods and approaches which are used in implementation of fingerprints sensing, analyzes, recognition and classification in biometric system. The goal of the work is not to create an exact guideline for fingerprints implementation but to make the reader acquainted with possibilities, advantages and weakness of the biometry of fingerprints in context of IT.
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Rendering Using Deep Shadowmaps
Hypský, Jan ; Kobrtek, Jozef (referee) ; Polok, Lukáš (advisor)
In computer graphics is problematic shadow rendering. Applications require to choose the appropriate lighting and shading method with respect to speed and display quality. This work is focused on rendering the shadows and eliminate alias, arising during their creation. For to create shadows will work to implement the methods Shadow Maps and she's extensions variant Deep Shadow Maps. Shadow maps allow to create shadow independently of the scene complexity without treatment alias. Deep shadow maps are able to display shadows along with the removal of alias thereby improve the quality of shading. For lighting scene are used local Lambert lighting models. The resulting application is created with using library OpenGL.
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O problémech seřazení při řízení servisních operací
Lín, Václav ; Vomlel, Jiří (advisor) ; Jiroušek, Radim (referee) ; Kouba, Zdeněk (referee) ; Ottosen, Thorsten Jorgen (referee)
The subject of the thesis belongs to the field of operations management. We deal with sequencing problems arising when there are multiple repair operations available to fix a broken man-made system and the true cause of the system failure is uncertain. It is assumed that the system is formally described by a probabilistic model, and it is to be repaired by a sequence of troubleshooting operations designed to identify the cause of the malfunction and fix the system. The challenge is to find a course of repair which has minimal expected cost. We study several variants of the problem proposed in the literature. We analyze computational complexity of those variants, apply integer linear programming to one variant of the problem, and examine the relation to machine scheduling.
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