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Safety of milling machines
Jelínek, Martin ; Blecha, Radim (referee) ; Blecha, Petr (advisor)
This bachelor thesis sort out a review of legislative requirements and standards according to the European Parliament and Council in the field of machine tools. It also deals with the explanation and inclusion of harmonized standards into the czech legal system. The safety requirements and the check lists are developed for the selected universal milling machine.
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Parametrization of network attacks
Jelínek, Michael ; Sikora, Pavel (referee) ; Blažek, Petr (advisor)
This bachelor thesis is dedicated to the definition of suitable parameters for network attack identification with the use of neural networks. In the theoretical part of this thesis are methods for anomaly detection in network communication, structure of artificial neural networks and DDoS attacks used for verification of detection capabilities. The practical part of this thesis is focused on the process of preparing data, the subsequent implementation into neural networks and a summary of the results achieved for the different setups of neural networks.
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Design of mountain-bike crossbar and its FEM analysis
Jelínek, Martin ; Maňas, Pavel (referee) ; Vrbka, Martin (advisor)
The aim of this diploma thesis is the part of evolution of the new bicycle frame for mountain biking, category enduro. The first part of this thesis is focused on creating dimensional modified model of the bike frame in CAD system SolidWorks. Subsequently this frame will be detailed by FEM analysis in software ANSYS Workbench and determine boundary conditions for this analysis. The final part is about visualization of the new bike frame.
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Systems with frequency hopping
Jelínek, Martin ; Říha, Kamil (referee) ; Pust, Radim (advisor)
This bachelor´s thesis deals the systems, which use the Frequency Hopping (FH). The brief history of frequency hopping and its development together with Adaptive Frequency Hopping technology (AFH) is introduced. The general function principle of AFH, which differs AFH from FH, is described. Advantages and disadvantages of frequency hopping and its division into fast (FFH) and slow (SFH) are described next. Some of military communication systems (e.g. SINCGARS, Eritac, MRR, Panther V-EDR and next) as well as some of commercial systems (e.g. worldwide-spread Bluetooth system) are introduced. Mentioned systems use digital modulations, three of basic digital modulations are demonstrated (ASK - Amplitude Shift Keying, FSK - Frequency Shift Keying and PSK - Phase Shift Keying). Basic types of used spectrum spreading (FHSS, DSSS, OFDM) are mentioned next. The FHSS type of spectrum spreading is described in more detail, because the spectrum spreading is done by frequency hopping. Particular systems contain error control of radio transmission of information, which is realized by FEC (Forward Error Correction) and ARQ (Automatic Repeat Query) techniques. Practical part of the bachelor´s thesis demonstrates, with usage of Matlab programme, adaptive frequency hopping function (AFH) during communication of Master-Slave devices, where more systems are active. This causes the interference of the communication. This interference is caused by static and dynamic jammers, that work in the same band as the Master-Slave devices.
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Probability-based model for network traffic
Bednár, Peter ; Jelínek, Mojmír (referee) ; Molnár, Karol (advisor)
This work identifies several basic types of traffic in IP networks and describes main features. The basic network services such as HTTP, VoIP and electronic mail are discussed focusing mainly on HTTP and VoIP probability-based models for network traffic which are applied to the software simulation of real network.
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Information system of user evidence
Sedláček, David ; Karásek, Jan (referee) ; Jelínek, Mojmír (advisor)
This bachelor thesis deals with proposal of web information system for accounting computer network users. It is designed with all necessary requisitions but with emphasis on simple use. This system is also flexible and relatively easy to extend thanks to its requirements for modularity and design styles. Implementation is complete and fully subject to concept.
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Laboratory exercises creation for course Sensor systems
Štětina, Vítězslav ; Jelínek, Mojmír (referee) ; Šimek, Milan (advisor)
Topic of bachelor thesis is Laboratory exercises creation for course Sensor systems and describes the theoretical and practical solutions focused on the creation of 5 laboratory experiments. To the laboratory exercises is used a programming language nesC, operating system TinyOS and other programs. In 5 chapters describe the actual instructions for laboratory exercises. They are composed of the basic tasks to complex assignment. The workflow is a task assignment, a list of necessary equipment, the procedure for creating the main part of program and subsequent installation to the node or base station. A part of the task is to analyze the source code and description of new orders compared to previous exercises.
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Establishment of the Linux internet gateway using advanced filtering
Matocha, Tomáš ; Pust, Radim (referee) ; Jelínek, Mojmír (advisor)
The thesis Establishment of the Linux internet gateway using advanced filtering focuses on~the installation of~the Linux operating system on~the older computers, that functions as a gateway to connect clients in the internal network to the Internet. The thesis describes creation an advanced filter with using iptables. Shows some types of security against attacks from the Internet. The other chapters are discussed, advanced traffic control mechanism (such as a TC and a qdisc). The system queue, it is highly beneficial where it is necessary to hierarchically divide traffic between users. It describes types of queue and assembled configurations for clients in the internal network. Next chapter describes the DNS server caching-only type and application denyhosts, which increases the overall security system. Have your own DNS server is certified, especially if we want to reduce the data traffic. Last chapter describes the RADIUS server and its implementation using Apache and MySQL database. Furthermore, the configuration options are described and the examples of the particular configurations are provided. Finally, it presented a system for authentication through the RADIUS server. The thesis seeks to provide a~complex view of security and filtering.
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