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Detection of VoIP Applications in Network Statistics
Havelka, Ondřej ; Tobola, Jiří (referee) ; Žádník, Martin (advisor)
VoIP applications allow us fast and cheap communication over the internet. Due to the massive expansion of these applications in last few years, there is growth of VoIP traffic, which is needed to distinguish from other traffic. Detection of VoIP applications is related to data monitoring and network traffic classification. The work focuses on detection of these applications: GTalk, ICQ, Skype, WLM a Yahoo. There are presented two detection techniques. First of them is based on behavior of VoIP applications. This technique uses the statistical characteristics of network flows as packet frequency and packet size. The second method is based on searching for patterns in packet contents. These packets carry voice data using protocol RTP. Both techniques were experimentally verified and the results are presented in the work.
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Computer Network Design for small business
Havelka, Ondřej ; Jordán, Vilém (referee) ; Ondrák, Viktor (advisor)
The aim of bachelor´s thesis is computer network design for small business. The bachelor´s thesis is divided into three parts. The first part is engaged theoretical ground of computer network, second part analyzes the current state of universal cabling within the specific business. The last part contains a design to modernize the existing universal cabling including summary of expected costs for realization of design.
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VoIP Quality Analyzer
Havelka, Ondřej ; Žádník, Martin (referee) ; Tobola, Jiří (advisor)
This master thesis deals with the design and implementation of an application for analyzing Voice over IP quality using NetFlow. In the beginning, there is summarized basic information about VoIP technology and NetFlow - its principles, the most used protocols, factors that have influence on call quality and call quality rating methods. Later there is presented proposal of application and then described its implementation. The created application was tested on samples, which simulate calls in network with delays and packet-loss. Within testing was made the comparison with commercial application and the results are discussed.
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Development of pressure switch for rail vehicles
Havelka, Ondřej ; Tůma, Jiří (referee) ; Tůma, Zdeněk (advisor)
This diploma thesis deals with the design of pneumatic pressure switch with adjustable hysteresis. In the thesis is carried out the introduction in the theory of compressed air and research of the pressure switches at the market. Based on the gathered information and customer specification, the design draft of the pressure switch has been created. In the thesis are described three main parts of the prototype: transform of the pressure, adjustable hysteresis and synchronization of the microswitches. In the end of the thesis is described the testing of prototype and summary of the results.
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Proposal for Optimization of Servers Using Virtualization and Consolidation
Havelka, Ondřej ; Sedlák, Petr (referee) ; Ondrák, Viktor (advisor)
The purpose of master's thesis is preparing the proposal for optimization of servers using virtualization and consolidation. The master's thesis is divided into three parts. The first one is engaged theoretical ground of computer network, second part analyses the current state of IT infrastructure within the specific business. The last part contains the proposal to modernization and optimization of existing server solution including summary of expected costs for realization od proposal.
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Interactive Designer of Executable BPMN Workflows for GPC Platform
Havelka, Ondřej ; Michal,, BATKO (referee) ; Ondrák, Viktor (advisor)
This master’s thesis deals with the issue of process modeling and its application in workflow modeling within the GPC framework. Specifically, it deals with the design and implementation of a module which will allow users to easily transform process diagrams of the widely used BPMN 2.0 standard into executable proprietary workflows that are used to configure the framework's processes. The solution will allow users to customize the platform for their purposes in a way that is familiar, visual and significantly simpler than existing solutions.
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Production of assembly jigs by Fused Deposition Modeling method
Havelka, Ondřej ; Dvořáček, Jan (referee) ; Nejedlý, Jindřich (advisor)
This bachelor thesis describes the design and manufacture of assembly jigs for the production of LCD TVs in the company Wistron Infocomm (Czech), s. r. o. In the thesis was carried out to assess the current status of use of assembly jigs, design and creation of two prototypes of assembly jigs. The work includes testing, choice of method of manufacture, their routine use in the production and evaluation of results. The work also include literary studies describing RapidPrototyping technology and its various methods.
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Visual Workflow Editor for GPC Platform
Havelka, Ondřej ; Michal,, BATKO (referee) ; Ondrák, Viktor (advisor)
This bachelor thesis deals with the issue of business process modeling and application of acquired knowledge in workflow modeling. The purpose of this work is to create and implement a BPMN diagram editor. This editor will be integrated into the GPC framework to simplify the conversion of business processes to XML workflows, which are used to configure the framework for specific customers. Resulting solution will increase the usability of GPC in small and medium businesses.
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A relationship between lateral symmetry of the shoulder joints during modified handstand execution and the Upper Quaretr Y Balance Test
Havelka, Ondřej ; Malíř, Roman (advisor) ; Chrudimský, Jan (referee)
Title: Relationship between lateral symmetry of the shoulder girdle in modified handstand position and Upper Quarter Y Balance Test Objectives: The aim of this study is to test the relationship between the lateral symmetry of the shoulder girdle in the modified handstand position and the score in the Upper Quarter Y Balance Test. Methods: This empirical research investigated the connection between the lateral symmetry of the shoulder girdle in a modified handstand position and the Upper Quarter Y Balance Test (UQYBT) score. Shoulder stability was assessed using the UQYBT score and categorized as shoulder with higher score (P, L, S). The quality of the handstand was evaluated by examining marker displacement relative to the baseline on the y-axis, resulting in higher marker position (P, L, S) and x-axis relative to the line segment, resulting in farther marker position (P, L, S). The relationship between these variables was analyzed using the Goodman- Kruskal λ association test, which measures the strength of association between two categorical variables (UQYBT and higher shoulder (P/L/S), and UQYBT and farther shoulder (P/L/S). The λ coefficient, ranging from 0 to 1, was used to interpret the relationship. Results: The results showed a minimal and statistically insignificant relationship between...
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Theological-ethical Reflection of Corporate In-houseLobbying in the Czech Construction Industry
Havelka, Ondřej ; Štica, Petr (advisor) ; Češka, Roman (referee) ; Mlčoch, Lubomír (referee)
Corporate in-house lobbying is an extremely topical, widely used and largely non- stipulated and controversial political and economic phenomenon, which, moreover, has no legislative support in the form of a valid law in the Czech Republic. The non- stipulation, controversy and ignorance of the context directly call for an ethical consideration of in-house lobbying, which is still absent in the field of theological ethics. The aim of the Dissertation is to verify the moral legitimacy of instrumentalized in-house lobbying. It deals with the question of what form and degree of morally legitimate instrumentalized in-house lobbying is compatible with the bases of theological ethics. In addition to verifying the moral legitimacy of in-house lobbying, the work seeks internal constant criteria for defining the legitimacy of in-house lobbying and variable limits for specific competition in the construction industry. The summary then offers a model code of ethics for in-house lobbyists applicable to business practice. The thesis follows the three-step methodology, i.e. 1. see, 2. judge, 3. act; this three-step methodology is extended to seven internal stages. The thesis provides a theological and ethical evaluation of corporate in-house lobbying, finding this type of lobbying morally legitimate provided the...
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