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Methods of machining difficult-materials
Šebela, Radek ; Prokop, Jaroslav (referee) ; Kalivoda, Milan (advisor)
The aim of this bachelor thesis is a comprehensive analysis of various types and methods of machining difficult-materials. In addition an overview of selected tool materials for machining difficult-materials and factors affecting the cutting area. At the end an overview of companies that are engaged in machining these materials.
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Measurement of the 802.11n standard properties
Halm, Martin ; Šebela, Radek (referee) ; Prokopec, Jan (advisor)
This bachelor’s thesis is bent on peruse standard 802.11n and inquest diversity from standard 802.11b, g. Standard 802.11b was, first used for wireless net „WLAN”. This standard was extensive standard 802.11g that the has bigger temporary carrier rate. This acceleration is incurred modulation OFDM. Next successor after these standards is standard 802.11n.
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Database system for printed circuit board production
Procházka, Jiří ; Pust, Radim (referee) ; Šebela, Radek (advisor)
Analysis of problems during designing web database and their structure for requirement of manufacturer of PCBs. Study of using applications intended for creation, administration and protection of database system. Systems for operation of web server. Principles of projection tabels in databases. Design of database's structure for production system of PCBs.
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Tetris 3D - made of array LED diode
Paták, Pavel ; Pust, Radim (referee) ; Šebela, Radek (advisor)
This thesis deals with suggestion of device for playing tetris game in 3D. There is used 3D LED display – the ashlar where the LED are situated in its volume. Thesis describes possibilities of display connection with a view to minimal number of control pins. It also describes display mechanical construction. Motion of blocks in the game is controled by tilt of device, thesis describes way of tilt measuring. It also decribes in details possibilities of connection of the microcontroller and the display, comparison of connection ways, sellection of one of these solution and sellection of the microcontroller. There is also noted the structure of control software.
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Half Duplex radio modem
Urbaník, Jaroslav ; Šebela, Radek (referee) ; Prokopec, Jan (advisor)
This bachelor thesis deals with a concept description and realization of wireless system for transmission of control signal. The system is designed for a half-duplex operation mode. Various options for system realization of the task solution is mentioned and described. The work analyses the choice of particular components and their intercommunication as well. PCB and Atmega16 microcontroller software technology is also concerned about. The usage of this wireless system is universal and it is possible to adapt it for particular application.
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Simulation of multipah propagation of multistate modulations
Polák, Ladislav ; Pust, Radim (referee) ; Šebela, Radek (advisor)
The diploma thesis Simulation of Multipath Propagation of Multistate Modulations is focused on the development of an appropriate algorithm in MATLAB environment, which is capable to simulate the impact of the multipath propagation on received signal (error rate) on the basis of given parameters of the transmission channels. Mechanisms and characteristics of the wave propagation in communication environment, types of digital modulations and their most important parameters are described in the first part of this thesis. The second part is focused on the simulation itself. Created GUI (Graphical User Interface) is able to display constellation diagrams of transmitted and received signals, as well as their bit error rate. It is also possible to compare these data with the data of signal, which is passed by a non-fading channel.
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Localization system making use of GPS and GSM
Klozar, Lukáš ; Pust, Radim (referee) ; Šebela, Radek (advisor)
Aim of this master´s project is to analyse localization possibilities in GSM and GPS wireless networks. Choise of proper module and design location device for both GPS and GSM networks. Design and construction of system, which is able to designate it´s positron, using both GPS and GSM networks. The location informations, are send to Internet server, using GPRS system. Localization techniques in both wireless network are described. The system which is able to get position information was designed and constructed. The module´s driving software and the software, which process the localization informations and controls the database storing process, was designed.
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The design of swirl turbine for the concrete locality for ČEZ
Šebela, Radek ; Dobšáková, Lenka (referee) ; Haluza, Miloslav (advisor)
This thesis deals with the design of water turbine enabling optimal utilization of hydro-energetic potential of given location (barrage on Úpa river) chosen by ČEZ a.s. company. Moreover, the option of multi-unit layout is discussed. Because of the low-head profile of given location, the technology of swirl turbine in siphon configuration was chosen. Technology of swirl turbine presents new modification of Kaplan turbine with no need of guide vane. Swirl turbine is characterized by its high discharge and high speed. The main part of this thesis is focused on hydraulic design of the turbine.
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System for remote measuring and data storing in central database
Šváb, Jaroslav ; Pust, Radim (referee) ; Šebela, Radek (advisor)
This Master´s thesis deals with the design and implementation of System for remote measuring and data storing in central databese. The system consists of server, which collects data and clients that send data to the server. On the server is installed program Apache in which runs utility script for collecting and evaluating data, written in PHP. Data are stored in MySQL relational database and can be clearly displayed. The client consists of microcontroller ATmega16, which evaluates data from sensors. These data are then transferred via Ethernet using the HTTP protocol through the module XPort.
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Measurement of the 802.11n standard properties
Halm, Martin ; Šebela, Radek (referee) ; Prokopec, Jan (advisor)
This bachelor’s thesis is bent on peruse standard 802.11n and inquest diversity from standard 802.11b, g. Standard 802.11b was, first used for wireless net „WLAN”. This standard was extensive standard 802.11g that the has bigger temporary carrier rate. This acceleration is incurred modulation OFDM. Next successor after these standards is standard 802.11n.
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