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Distributed Processing of IP flow Data
Krobot, Pavel ; Kořenek, Jan (referee) ; Žádník, Martin (advisor)
This thesis deals with the subject of distributed processing of IP flow. Main goal is to provide an implementation of a software collector which allows storing and processing huge amount of a network data in particular. There was studied an open-source implementation of a framework for the distributed processing of large data sets called Hadoop, which is based on MapReduce paradigm. There were made some experiments with this system which provided the comparison with the current systems and shown weaknesses of this framework. Based on this knowledge there was created a specification and scheme for an extension of current software collector within this work. In terms of the created scheme there was created an implementation of query framework for formed collector, which is considered as most critical in the field of distributed processing of IP flow data. Results of experiments with created implementation show significant performance growth and ability of linear scalability with some types of queries.
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Verification of diagnostic device using NEWS methods
Chlada, Milan ; Krofta, Josef ; Kober, Jan
Within the framework of the project „Verification of diagnostic device using NEWS methods“ supported by SIC, several calibration tests of newly developed apparatus for non-destructive testing of materials by NEWS (Non-linear Elastic Wave Spectroscopy) methods were realized. The report summarizes the results of characteristics measuring for case of particular components of the device and the demonstration tests of defect detection in selected structure parts.
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Internet Tools for Lifelong Learning in the IT Sector
Janková, Martina ; Jašek, Roman (referee) ; Roudný, Radim (referee) ; Slabý, Antonín (referee) ; Rais, Karel (advisor)
In the presented dissertation, there is, based on a given topic “Internet tools for lifelong learning in the IT sector”, expressed an appropriate coverage of created partial research tasks with an active solution of them at the Faculty of Business and Management, Brno University of Technology for branch Company Management and Economics, and that in accordance with the defined areas of research and publication activities. For systemic approach to the whole dissertation, it was defined area of theoretical perspectives and expressed methodology for addressing systemic models of education on Internet means and for that practical research work was chosen adaptable (“learning”) Company 1 as a reference (for solving individual practical research tasks) and a methodology of modern approach to modelling was created (“for modern management and information communication between systems”) and also modelling of a required adaptable (“directly also improving with modelling”) Internet (and intranet) environment of companies and its use in the process of lifelong learning of knowledge workers (“teachers”) of Company 1 and possible additional (“knowledge workers and users”) Company 2, 3, ..., m i.e. “businesses as other customers” and all that to actively create an adaptable and new space with the possible use of an evolutionary (“new and also modern and intelligent and self-learning”) means of information and communication technologies (ICT) both from the world and from the Czech Republic and especially new (and evolutionary perspective) Internet tools and resources for business management, lifelong learning in IT sector and necessary monitoring of demanded company's competitiveness operating in dynamically developing IT. By systemically solved modelling on computers, there is expressed an issue of appropriately selected internet tools in a competitive environment of companies, and also there is addressed by computer modelling a new approach to modelling leading to an anticipated modernization of modern electronic lifelong learning forms built on tools and resources of the Internet. The work also includes a creation of models on PCs allowing comparison of expected changes in competitiveness of companies reacting to the benefits of created methodology and that leads to an anticipated improvement in the quality of management and economics of companies in terms of relative improvement of their competitiveness. Solving of these modern issues is conducted based on an appropriate analysis of selected enterprises, corresponding to the solved topic and solved objectives of the work and also obtained information from publications in world information sources on the Internet and from virtual libraries of the world, publishing, seminars, proceedings and conferences. The results of system analytical approach to solving tasks and activities of the research work have been regularly published in articles of professional and peer-reviewed journals and also in conference contributions. In these research results, there is systematically expressed a new essence of solving interface of social and IT technical system with selected resources of internet tools for lifelong learning companies working in IT sector as a possible contribution into modern creation of self-learning organizations.
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Operational Parameters of LED and their Modelling
Pavelka, Tomáš ; Novák,, Tomáš (referee) ; Gašparovský, Dionýz (referee) ; Baxant, Petr (advisor)
Doctoral thesis deals with parameters of LED light sources and their static and dynamic changes due to variable operational conditions. Firstly there is briefly described the history of light emitting diodes, that brought LED from unintentional observation of luminescence to light source, which is generally used through the whole area of lighting techniques. Thesis focuses on light parameters analysis, which are specific for semiconductor light sources and their mutual relations. These relations in compliance with understanding the principles of light emission in semiconductor light sources enable establishing of basic connections and effects usable for LED behaviour model. Mutual relations of LED parameters and influencing factors are verified by measurement of chosen testing samples. For deeper understanding of diode parameter influencing mechanisms there are analysed current degradation models including degradation of partial components. On the basis of these facts there is created a model of LED luminaire operating with LED parameters together with cooling system that represent the integral part of the luminaire. Impact of supply drivers is also studied, because they are necessary for LED operation. Designed model supports the area of static changes of light parameters, as well as the dynamic changes of output parameters. Presented model is verified by testing measurements at basic operational states and partially outside of the common operational limits. There are also presented the possibilities of real use of the model that involve the evaluation of designed luminaire for specific light sources, searching for optimal operational limits, optimization of luminaire heatsink or using public lighting systems for regulation of electricity grid load fluctuations.
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Wind resource assessment for selected sites in the territory of the Czech Republic
Hanslian, David
This set of studies analyses the wind conditions and expected wind power production at selected sites in the Czech Republic. At first, the calculation of wind conditions by VAS/WAsP 1, VAS/WAsP 2 and PIAP models is performed. Based on the comparison and analysis of model results, the generalized wind climate pertaining to the assessed site is estimated. The final results are calculated by WAsP model using this generalized wind climate. The expected wind power production of proposed wind turbine or wind farm is calculated as well as the map of simulated average wind speed and potential wind turbine production over the surrounding area. The uncertainty analysis is performed as well. This set consists of 6 partial reports.
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Condition monitoring of thrust ball bearings using continuous AE
Chlada, Milan ; Nohal, L. ; Převorovský, Zdeněk
Fast and reliable analysis of continuous AE recorded during endurance tests on flat washer parts reliably simulating critical rolling contact fatigue of the full-scale bearings is presented in the paper. Two channels of continuous AE signal were partially recorded within whole specimen lifetime tests and compared with other experimental parameters as vibration rate or temperature. As an alternative to classical spectrogram analysis, we proposed to use histograms of time intervals between threshold amplitudes crossings in various frequency bands represented by the wavelet decomposition. Results obtained on long-time records are discussed, illustrating advantages of proposed AE signal processing, which can be done in real time to observe the processes before the onset of the final damage on the surface of the specimen more precisely than vibrodiagnostics.
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The analysis of BI tools in Oracle's environment
Nisznanský, Petr ; Pour, Jan (advisor) ; Derfler, Václav (referee)
Hlavním cílem diplomové práce (DP) je provedení analýzy prostředí a jednotlivých nástrojů na podporu Business Intelligence (BI) na platformě Oracle. Analýza zahrnuje komplexní proces BI řešení od instalace potřebných programových prostředků (databáze, BI balíky, dokumentace atd.) až po zprovoznění praktické demonstrační aplikace a zhodnocení celé platformy. Práce se skládá ze čtyřech hlavních částí. V první části uvádím čtenáře do problematiky BI. V druhé části analyzuji globální charakteristiky prostředí Oracle BI a porovnávám je s SQL Serverem. Třetí část obsahuje analýzu a komparaci systému Oracle BI se systémem SQL Server ve třech oblastech (oblasti zahrnují: extrakci ? transformaci ? natažení dat, analytické zpracování dat a reporting) včetně vyhodnocení uvedených oblastí podle několika kritérií. V jednotlivých oblastech zjišťuji zejména dílčí architektury, používané nástroje a jejich funkcionalitu. Poslední část doplňuje stručnou analýzu světového trhu OLAP technologií.
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Economic consequences of the dissolution of Czechoslovakia in 1993
Ječmeň, Tomáš ; Tóth, Andrej (advisor) ; Chalupecký, Petr (referee)
The aim is to analyze the economic and political aspects of the dissolution of Czechoslovakia in 1993 in the context of monetary separation and further analyze its impact on monetary indicators in the Czech Republic and the Slovak Republic. The thesis provides a comprehensive view of the development of relations within Czechoslovakia after 1989 and monetary separation in 1993. First, attention is focused on description and analysis of economic and political relations between the two nations, which are demonstrated in the illustrative examples of the development of Czechoslovakia between 1989 and 1993. Then analyzes the preparation, conduct and impact of monetary separation on the inflation rate, balance of payments, interest rates and foreign exchange reserves, and consequently macroeconomic indicators are compared both newly formed states. The thesis is written for use with the description, analysis and comparison. Based on the analysis, we can conclude that the collapse of the state was no longer possible in 1993 to avoid. It can be concluded that the monetary separation had no immediate impact on the study of monetary indicators. Based on comparison of selected macroeconomic indicators of the countries we were able to demonstrate that in the first years after the collapse of the federation with the Czech economy developed better and more stable than Slovak Republic. Implementation and results of the disintegration of Czechoslovakia and the associated monetary separation can be considered as a basis for solving current problems eg. In any disintegration of the common currency in the European Union or the possible dissolution of several national states. A proper currency separation in 1993 had a negative impact on the development of monetary variables surveyed states.
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Comparison of approaches to storing linked open data
Hanuš, Jiří ; Chlapek, Dušan (advisor) ; Kučera, Jan (referee)
The aim of this diploma thesis is a detail description of current possibilities and ways of storing open data. It focuses on tools and database systems used for storing linked open data as well as on the selection of such systems for subsequent analysis and comparison. The practical part of the thesis then focuses on the comparison of selected systems based on a selected use case. This thesis introduces the fundamental terms and concepts concerning linked open data. Besides that, various approaches and formats for storing linked open data (namely file ori-ented approaches and database approaches) are analyzed. . The thesis also focuses on the RDF format and database systems. Ten triplestore database solutions (solutions for storing data in the RDF format) are introduced and described briefly. Out of these, three are cho-sen for a detailed analysis by which they are compared with one another and with a rela-tional database system. The core of the detail analysis lies in performance benchmarks. Ex-isting performance oriented benchmarks of triplestore systems are described and analyzed. In addition to that, the thesis introduces a newly developed benchmark as a collection of database queries. The benchmark is then used for the performance testing. The following systems have been tested: Apache Jena TDB/Fuseki, OpenLink Virtuoso, Oracle Spatial and Graph a Microsoft SQL Server. The main contribution of this thesis consists in a comprehensive presentation of current possibilities of storing linked open data.
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