National Repository of Grey Literature 163 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Application of Unsupervised Learning Methods in Graph Similarity Search
Sabo, Jozef ; Burgetová, Ivana (referee) ; Křivka, Zbyněk (advisor)
Goal of this master's thesis was in cooperation with the company Avast to design a system, which can extract knowledge from a database of graphs. Graphs, used for data mining, describe behaviour of computer systems and they are anonymously inserted into the company's database from systems of the company's products users. Each graph in the database can be assigned with one of two labels: clean or malware (malicious) graph. The task of the proposed self-learning system is to find clusters of graphs in the graph database, in which the classes of graphs do not mix. Graph clusters with only one class of graphs can be interpreted as different types of clean or malware graphs and they are a useful source of further analysis on the graphs. To evaluate the quality of the clusters, a custom metric, named as monochromaticity, was designed. The metric evaluates the quality of the clusters based on how much clean and malware graphs are mixed in the clusters. The best results of the metric were obtained when vector representations of graphs were created by a deep learning model (variational  graph autoencoder with two relation graph convolution operators) and the parameterless method MeanShift was used for clustering over vectors.
Support for Educational Intermediate Language
Krejčí, Ondřej ; Tomko, Martin (referee) ; Křivka, Zbyněk (advisor)
This bachelor's thesis deals with the creation of software support for educational intermediate codes IPPcode, IFJcode and VYPcode which are used at FIT BUT in courses covering compilers. The aim of this thesis is the creation of an extension for an existing source code editor which adds syntax highlighting, interpreter and debugger for the mentioned intermediate codes. This thesis contains an evaluation of possible editors. Subsequently, it describes options for extending the selected editor Visual Studio Code and the implementation of the extensions.
Demonstration of Scattered Context Grammars with Single Context-Sensitive Rule
Holas, David ; Klobučníková, Dominika (referee) ; Křivka, Zbyněk (advisor)
The goal is to create an application that constructs scattered context grammars with single context-sensitive rule from queue grammars, and derives strings using them. The application presents the whole process to user in form of plain text or HTML. In order to derive strings, the heuristic is used to reduce the number of applicable rules in each sentential form. Applicable rules can be selected manually by the user in order to alter derivation process. Two errors were discovered in underlying theory of thesis. Specifically in transformation of queue grammars into first normal form and the construction of scattered context grammars with single context-sensitive rule. A partial solution to the second error was found and is implemented in application.
Karel 3D - Application for Teaching of Programming
Čoupek, Vojtěch ; Regéciová, Dominika (referee) ; Křivka, Zbyněk (advisor)
The work provides a survey of the tools available for the teachers of Informatics who teach students the basics of programming. The main aim is to create the implementation of Karel pedagogic language inspired by the work of Andrej Blaho and his colleagues for MS-DOS platform. The new web application is introduced that expands the functionality of the original language with variables and includes the up-to-date elements of the user interface, such as block programming, highlighting the language syntax, syntax checking and 3D graphics. The application also provides a set of basic examples for teachers and allows them to create their own tasks.
Information System for Management of Company Employees
Sklenář, Pavel ; Křivka, Zbyněk (referee) ; Bartík, Vladimír (advisor)
Purpose of this thesis is to help companies in terms of managing their own employees including analysis of employees shifts using OLAP, thanks to OLAP analysis companies can find out for example total delays on employees shifts. Information system is created as a web application implemented in PHP using the Laravel framework with MySQL database. Information system functionalities are: employees management, including management of employees attendances, Google Drive management, generating various files in PDF format, viewing various statistics, employees ratings, shifts management, vacations management, diseases management, employees languages management, reports management, injuries management. 
Offline Mode Support in Mobile Applications
Musil, Marek ; Křivka, Zbyněk (referee) ; Burget, Radek (advisor)
Jednim z cilu teto prace je pruzkum ruznych pristupu k vyvoji mobilnich aplikaci se za- merenim na vyuziti webovych technologii. Nasledne jsou zkoumany a porovnany existujici reseni pro podporu offline rezimu s opozdenou synchronizaci dat u mobilnich aplikaci. Zaver teto prace tvori navrh a implementace mobilni aplikace, ktera vyuzije zkoumane technologie.
Information System for "Majáles"
Hemza, Petr ; Rychlý, Marek (referee) ; Křivka, Zbyněk (advisor)
The aim of this work is to design and implement a system for managing users with bonuses and their organizational activities in preparation for a music festival. The reason for creating this system is the transition from a technologically obsolete and non-intuitive system to a new one. The newly created system, developed under Nette technology, allows users to work more efficiently and comfortably. The same requirements were placed on the administration that manages these users. The whole system includes a reward bonus program, which is based on modern marketing principles. The testing showed that about 86 % of users rate the new system more user-friendly and 80 % of users positively rate the clarity and usability of the system. The created system makes it possible to support the sale of tickets for any festival or event and to enable the public to participate in the preparations for the event.
Methods of Data Extraction from the Web
Perina, Lukáš ; Křivka, Zbyněk (referee) ; Burget, Radek (advisor)
The purpose of this bachelor thesis is to design an architecture and subsequent implementation of an application designed for data extraction (web scraping) from web documents. Unlike conventional methods, it is an extraction based on defining data types and regular expressions of requested elements. Extraction is executed in such a manner, where it is not necessary to know the detailed structure of given web document and the possibility of using just one definition to detect requested elements on different web pages. Algorithm is able to achieve overall accuracy of 85,51% and recall 80,28%. This approach can reduce the time required for analysis of web pages significantly and not to take the structure of the code as a determining factor while creating web scraping requests.
Source Code Metrics for Quality in Java
Sherstobitov, Vladyslav ; Dvořák, Tomáš (referee) ; Křivka, Zbyněk (advisor)
Pro kontrolu a zlepšovaní kvality zdrojového kódu musí být zaveden systém, který se skládá z kvantitativních metrik a jejich analýzy. S použitím metrik kvality softwaru, které reprezentují, jak dobře je zdrojový kód napsán, lze hodnotit zdrojový kód. Na základě tohoto hodnocení může kód splňovat nebo nesplňovat stanovená kritéria, která mohou být použita pro mnohá účely. Daný výzkum prezentuje program vyvinutý na základě identifikovaných vlastností kódu a souvisejících metrik, metod používaných při tvorbě programu a výsledků testů založených na projektech s otevřeným zdrojovým kódem.
Source Code Metrics for Quality in Java
Sherstobitov, Vladyslav ; Burget, Radek (referee) ; Křivka, Zbyněk (advisor)
Aby bylo možné kontrolovat a zlepšovat kvalitu kódu, musí být zaveden systém, který se skládá z kvantitavních metrik a jejich analýzy. S použitím metrik kvality softwaru, které nejlépe reprezentují, jak dobře je zdrojový kód napsán, lze hodnotit zdrojový kód. Na základě tohoto hodnocení může kód splňovat nebo nesplňovat stanovená kritéria, která mohou být použita pro mnohé účely. Daný výzkum prezentuje program vyvinutý na základě identifikovaných vlastností kódu a souvisejících metrik, metod používaných při tvorbě programu a výsledků testů založených na open-source projektech.

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