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Materials for atypical constructions of bicycle frames
Motl, Daniel ; Věchet, Stanislav (referee) ; Němec, Karel (advisor)
Bachelor’s thesis deals with materials for atypical bicycle frames. At first goes to history of generally bicycles. After gives definition what atypical bicycle is and includes four practical examples this type of bicycle which was real manufactured. Next step is about materials. Firstly about all types of materials uses in bicycles industry. Secondly the most suitable materials for atypical frames were choosen. In the end this materials were described in detail.
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Wireless data transmission in ISM frequency band using Manchester encoding
Záděra, Zdeněk ; Němec, Karel (referee) ; Zeman, Václav (advisor)
This work is dedicated to the design and implementation of modules for the bidirectional transmission of data in the ISM band (Industrial, Scientific and Medical), used for private purposes, such as the transmission of telemetry data between mobile devices in the field. Delivery is solved by using RF modules RFM12BP the maximum power 500mW, these intelligent modules are controlled with microprocessor companies ATtiny2313 Atmel. Microprocessor is also used for the transfer of serial interface between computers and RF interface module. Utility for microcontrollers is written in C language development in middle CodevisionAVR. The project is designed in cooperation with the staff development center in Brno Honeywell.
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Methods of hydrogen charging of steels for an experimental purposes
Gordiak, Michal ; Němec, Karel (referee) ; Válka, Libor (advisor)
Bachelor thesis deals with the issue of hydrogen charging. The first part of the thesis describes individual methods, by which experimental materials are charged with hydrogen today. There are also included results of hydrogen charging experiments available in literature, achieved by described methods. The second part of the thesis is focused on techniques for analyzing hydrogen in metals and measuring surface or overall concentration of hydrogen in specimens.
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Turbocodes and their application in telecommunication systems
Trčka, Tomáš ; Křivánek, Vítězslav (referee) ; Němec, Karel (advisor)
This Diploma thesis deals with Turbo code problems. The Turbo codes belong to the group of error correction codes, sometimes referred to as forward error correcting (FEC) codes or channel codes. This thesis can be thematically divided into two basic parts. The first part describes turbo code encoder and decoder block diagram with the illustration of two most frequently used iterative decoding algorithms (SOVA and MAP). The end of this part contains best known turbo codes, which are used in present communication systems. The second part pursues simulation results for the turbo codes using Binary Phase Shift Keying (BPSK) over Additive White Gaussian Noise (AWGN) channels. These simulations were created in the MATLAB/SIMULINK computer program. It will be shown here, that there exist many different parameters, greatly affecting turbo codes performance. Some of these parameters are: number of decoding iterations used, the input data frame length, generating polynoms and RSC encoders constraint lengths, properly designed interleaving block, decoding algorithm used, etc.
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The Application of Composite Materials in Automotive Industry
Beck, Branislav ; Jech, David (referee) ; Němec, Karel (advisor)
The aim of the bachelor’s thesis is to qualify the application suitability of the composite materials in the automotive industry. The first chapter offers the overview of selected composite materials, contains their basic classification and description of the basic components. The second part of this thesis is focused on the application of the composites in the automotive industry, discusses the advantages and disadvantages that are connected to the application of these technical materials.
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Machining of polymericMaterials
Ondráček, Ivo ; Němec, Karel (referee) ; Molliková, Eva (advisor)
This bachelor’s thesis deals with the machining of polymeric materials and the major differences between the machining of metals and polymers or plastics. Introduction describes the basic elements in the history of the discovery and use of plastics. The thesis focuses on the basic division, further definitions and internal structure of the polymers. There are also discussed the most widely used machining technology and requirements for tools and materials. At the end of the work we are specified properties and selected types of plastic materials intended for processing. Practical informations were obtained during the visit to Brno company Belt Plast, Ltd.
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Tree Code Decoding Methods
Zamazal, Zdeněk ; Lambertová, Petra (referee) ; Němec, Karel (advisor)
This thesis deals with applying knowledge of data channel coding and concerns about possibilities of tree codes decoding. It describes several decoding methods and inquires their ins and outs. Basic knowledge of theory of information is necessary, it is presumed that reader is familiar with convolutional codes and coder definitions. Criterions for choosing decoding method are introduced and lightely described. A decoder is designed using method choosed by denoted criterions. Implementation of the decoder, using Matlab Simulink enviroment, has taken part in the thesis. Function of the decoder is verified in simulation.
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