|
Cipher framework
Bureš, Filip ; Beneš, Antonín (referee) ; Lukeš, Dan (advisor)
The aim of this bachelor thesis is to create a scripting language and a program (language interpreter), which on basis of these scripts encrypts and decrypts texts. The program is as independent on a concrete operating system as possible. The programming language used to create this program is C (C++ if necessary). The thesis is primarily aimed to substitution and transposition ciphers, the computational difficulty of which does not eliminate practical use of the interpreter for their implementation. Part of the program is the possibility, that users can create their own libraries of functions, which could be used for writing scripts. One of the assumed uses of this system is its use as a basic instructional material for elementary and/or popularizing seminars about encrypting. The interpreter makes it possible to observe the processing of the chosen script and the values of variables (debugging tool). User and programmer documentation (incl. formal language syntax description) is included.
|
|
Distributed Sytem for Verification of Properties of Natural Numbers
Tomisová, Martina ; Peterek, Nino (referee) ; Mírovský, Jiří (advisor)
The result of my work is a system for distributed verification of properties of natural numbers. It has two parts - server and client. These communicate via HTTP protocol. The clients perform the computation, the server distributes the work (numbers) and gather results (properties of the given numbers). The input of one computation should be one natural number, as well as the result (output). The distribution can be used for verification of a given property for several natural numbers. Particular jobs can be added to the client as plugins. Two examples of plugins are a part of the work. The first one is very simple and shows how to create plugins. The second example searches for prime numbers (and has it's own arithmetics library for long numbers) - the server can distribute (possibly big) numbers, the client will verify whether a given number is a prime number.
|
|
Modelling PIM-SM in OMNeT++
Procházka, Tomáš ; Ryšavý, Ondřej (referee) ; Veselý, Vladimír (advisor)
In this master's thesis I deal with modelling and simulating of multicast routing protocol PIM Sparse Mode in OMNeT++. I also describe basic information about multicast, protocol PIM-SM, its configuration and multicast data streams visualization in computer networks. The thesis is especially focused on design and implementation of PIM-SM in OMNeT++ and extension of ANSAINET library.
|
|
Causes of discomfort perceived by laptop users
Kárníková, Libuše ; Véle, František (referee) ; Pavlů, Dagmar (advisor)
Work title: Causes of discomfort perceived by laptop users Work objectives: The objective of this thesis is to analyze which form factors of computers are being used by today's university students, the postures and habbits exerted during the use and their effect on a perceived discomfort. Determining the factors affecting the intensity of discomfort during the work with laptop will enable us to suggest suitable precautions that could improve user's discomfort. Methods: Research method of this thesis was a survey conducted with 100 Czech university students. Questionnaire monitored the factors, that were suspected, according to studied literature, to affect the intensity of perceived discomfort. Dependency of reported discomfort on recorded data sets was analysed by regression analysis. Results: Today's university students are using mostly laptops. With increasing percentage of time spent using notebook (as opposed to time spent with desktop computer) average intensity of discomfort is slightly increasing. During the work, laptop users were experiencing the greatest intensity of discomfort in the neck and head. There was no singnificant reported dependence between intensity of discomfort and the time spent using the laptop. Also, no statistically significant influence on intensity of discomfort was...
|
|
Comparison of the development of graphical user interface in Swing and wxWidgets
Hrubý, Jan ; Pavlíčková, Jarmila (advisor) ; Kureš, Richard (referee)
Thesis deals with comparison of two popular programming libraries for the creating the graphical user interface. First is Swing where it is used Java language and the second is wxWidgets in C++. The main goal of my thesis is objectively compare strong and weak points of these two libraries concerning about factors like rapidity of development, platform independent, rapidity of user interface, facility of globalization, development of new components and creation of distribution programme. This comparison can make easier the choice of library for specific project and thank to using simple and practical examples, it is easier to understand and adopt mechanism of these libraries. Thesis is divided into Swing part and wxWidgets part. Each part starts with description of a way how the library is used. I will demonstrate implementation of simple application and creation of new user interface components. At the end I will write general comparison of both libraries according to established criteria.
|
|
The propagation of the stress waves in an inhomogeneous media.
Hora, Petr ; Šiňor, M.
In this contribution we pay attention to the propagation of the stress waves in an arbitrary complex inhomogeneous media. For the system of elastodynamic wave equations we have adopted the method of solution based on the local interaction simulation approach (LISA) and the sharp interface model (SIM).The implementation of LISA/SIM in 2D and 3D to computer codes is done in the C programming language. Preprocessor is done in the programming language Python with graphics library wxPython/wxWindows.
|
|
Inverse values of EEG signal power in joint EEG-fMRI analysis
Sanetrníková, Dominika ; Kolář, Radim (referee) ; Labounek, René (advisor)
The first part of this thesis summarizes the basic theory of brain activity measurement using the BOLD signal and scalp EEG, the effect of noise phenomena in the data and its suppression, the merger of the fusion of the measured data using the general linear model and the current implementation of computational algorithms in the software library EEG Regressor Builder 1.0. Within the own solution of this thesis, the changes of the software library to version 1.1 were realized according to the requirements of the bachelor thesis. The hypothesis that temporal changes of the EEG relative band power (20 - 40Hz) has the same spatial correlates with the BOLD signal as the inverse power in the frequency range 0-12Hz. The hypothesis was rejected based on the calculation of similarity criterions between 3D activation maps for different parameter settings of the joint analysis calculations. As an appropriate criterions were chosen the correlation coefficient and the cosine criterion. The Euclidean distance was proved to be unfit. Also it was proved the inverse power value of EEG signal in the given frequency band brings to the common EEG-fMRI analysis an anti-correlated signal to the normal absolute power in the same frequency band. Furthermore the influence of regressors describing motion artifacts reduces the number of supra-thresholded voxels.
|
|
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.
|
|
Gradient Boosting Machine and Artificial Neural Networks in R and H2O
Sabo, Juraj ; Bašta, Milan (advisor) ; Plašil, Miroslav (referee)
Artificial neural networks are fascinating machine learning algorithms. They used to be considered unreliable and computationally very expensive. Now it is known that modern neural networks can be quite useful, but their computational expensiveness unfortunately remains. Statistical boosting is considered to be one of the most important machine learning ideas. It is based on an ensemble of weak models that together create a powerful learning system. The goal of this thesis is the comparison of these machine learning models on three use cases. The first use case deals with modeling the probability of burglary in the city of Chicago. The second use case is the typical example of customer churn prediction in telecommunication industry and the last use case is related to the problematic of the computer vision. The second goal of this thesis is to introduce an open-source machine learning platform called H2O. It includes, among other things, an interface for R and it is designed to run in standalone mode or on Hadoop. The thesis also includes the introduction into an open-source software library Apache Hadoop that allows for distributed processing of big data. Concretely into its open-source distribution Hortonworks Data Platform.
|
|
SMV-2016-21: DA modul for EOD
Radlička, Tomáš
The program library for integrating the differential algebraic method in the EOD program was developed. The set of examples was computed which enables testing of the software.
|
guest ::
