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Alternative Methods for the Analysis of Structural Changes in Muscle Tissue
Kaspar, Pavel ; Hrabovský, Miroslav (referee) ; Adam, Vojtěch (referee) ; Grmela, Lubomír (advisor)
Tato disertační práce se zabývá tématikou analýzy strukturálních změn ve svalové tkáni a metodikou optického měření. I přesto, že existuje nezanedbatelné množství metod pro detekci konkrétních změn ve svalovině, především pak v konzumním mase, drtivá většina z nich se zaměřuje na jeden konkrétní proces a vyžaduje komplikované postupy a drahé přístroje. Předmětem prezentovaného výzkumu není tedy nalézt metody přesnější a specifičtější, než jsou ty již exitující, ale raději zvolit alternativní přístup k problematice. Součástí je pak i snaha najít možnosti jak obejít technologické nároky moderních postupů a přitom se přiblížit co nejvíce jejich informačnímu přínosu. Za tímto účelem je potřeba mít dostatečné teoretické znalosti a experimentální zkušenosti především v oboru fyziky, optiky a postupů měření, ale také široké povědomí o problematice biologických tkání a procesů v nich probíhajících. Na základě získaných informací a pochopení pochodů ve svalové tkáni jsou navrhnuty a testovány tři rozdílné přístupy. Vytvořené metody pracují s fotony v transmisním i reflexním uspořádání. Pomocí pozorování změn absorpce, rozptylu a polarizace světla po interakci se vzorkem svalové tkáně jsou posouzeny jeho další optické vlastnosti především index lomu a optická anizotropie. Identifikace změn optických vlastností vzorků za různých podmínek umožňuje společně se simulací Monte Carlo posoudit rozdíly mezi vzorky čerstvými, starými, sušenými a jednou či dvakrát zmraženými a rozmraženými.
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Li-Fi, use of light and LED to communicate between luminaires and user
Ludányi, Róbert ; Novák, Daniel (referee) ; Škoda, Jan (advisor)
This thesis is focused on the use of light and LEDs for communication between the light and the user. In the introduction, the principles of VLC, which Li-Fi is part of, are described. The work also contains issues on the topics of Li-Fi, such as methods of modulation of carrier signals for data transmission, comparisons between other wireless communications, individual elements of optical frontends, current versions of Li-Fi and other possible uses of this technology. The work also contains the designing of a system working on the principle of Li-Fi.
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Automatic configuration of workstations in Cisco academy laboratory
Homolka, Jiří ; Jelínek, Mojmír (referee) ; Komosný, Dan (advisor)
My thesis is focused on the subject of working with distant stations connected with the laboratory control of Cisco academy. Station operations, i.e. laboratory control, have been carried in the environment of the Linux operating systems. The first part of the thesis includes a description of the laboratory, its network architecture and software equipment. Also, the VMware tool is described here. VMware tool is intended for virtualization of computer stations, where the virtual station is created. In this virtual station another operating system may be run. The problems of the command interpreter, its function and possibilities are described here too. Main attention is devoted to the Bash command interpreter and to the creation of the scripts. There are descriptions of the basic tools intended for the network communication with the distant stations. Among the most important parts belong the protected communication, the production of the autentization keys as well as the tool for data recording on more stations at the same time. The description of the access rights to the files and directories is included too. The target of this thesis was to create the scripts in the Bash programming language. The scripts are focused on working with the laboratory stations. They are the sublayers of the common project for this laboratory control. They were developed for the cooperation with the the web interface and MySQL database, created by Bc. Zdeněk Hrabal. The Scripts are intended for the finding information about the stations and virtual systems, and also for the recording images and configuration files of the virtual systems at the distant stations. Recording files and directories is enabled too. The other scripts deal with the erasing and changing of the rights of the particular files and directories. Setting commads with the super-user competence is used at this place. The scripts for the switching on and off the laboratory workstations were created too. To solve the problem described above I chose to develope more scripts. Each of them subserves the particular part of the task. The form of the input and output data of the scripts was select with the reference to the cooperation with the web interface and database. The data are implemented by the form of the input and output files. The output information and the process of the carried operations are displayed through the web interface. The scripts together with the web interface are placed and run from the school server adela.utko.feec.vutbr.cz. In the thesis the settings of the access privileges for the current directories and the files of virtual systems and scripts are presented too.
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Converged solution of speech services
Mácha, Tomáš ; Kovář, Petr (referee) ; Novotný, Vít (advisor)
Development in VoIP technology is connected with the rapid growth of quality and data rate of the Internet connection. The application of the VoIP technology has become one of the key areas in telecommunication and networking. The main task of this thesis was to explore the questions of IP telephony and voice transmission over data networks according to H.323, SIP and Cisco architectures. Next focus was on designing and implementing experimental workplaces of mentioned architectures and their converged solutions. The purpose of the first chapter is to introduce the theory background of architectures required for implementation of real-time services in data networks and their comparison. The key objectives of the second and third part are to design and implement experimental workplaces containing signaling and proxy servers and hardware or software IP phones of several architectures. Illustration examples of different network topologies are included to demonstrate designed and realized VoIP solutions. Several tests of established communication are done using a packet analyzer. These tests examine duplex data transmission over IP. This article also contains two laboratory exercises designed according to gained practical experiences. The laboratory exercises provide an overview of theory and clearly indicate the possibilities of IP telephony.
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Car gearboxes
Charvát, Adam ; Ramík, Pavel (referee) ; Kaplan, Zdeněk (advisor)
This bachelor's thesis is focused on the most common transmission types of passenger cars and their components with a focus on manual transmissions, automatic transmissions, dualclutch transmissions, continuously variable transmissions, and transmissions for electric and hybrid vehicles. The work deals with the construction, principle of operation and comparison of the properties of these devices. Thesis also contains a look at development trends of these transmissions.
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Electric winch for drilling wells
Volec, Martin ; Kašpárek, Jaroslav (referee) ; Škopán, Miroslav (advisor)
This bachelor thesis undertakes design of two speed electric winch for the headgear specified for the drilling of the water wells through the use of core technology with the loading capacity up to 1000 kgs. Thesis consists of the theoretical as well as the operational part. Theoretical part is occupied with the possibilities of the problem solving, calculates the main winch parameters. In the study the reasons for choices of the main parts of mechanism e.g. electromotor, transmission, winch and others are given. Generally the brief introduction into the problem is inserted in each chapter prior to the calculations. Operational part involves the drawing of the overall configuration and the cable drum setup.
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Thin Film Electrodes for Electrochromic Devices
Macalík, Michal ; Kadlec, Jaromír (referee) ; Nováková,, Sabina (referee) ; Sedlaříková, Marie (advisor)
The work deals with the deposition of layers for electrochromic device with different methods. Transparent electrically conductive layer of SnO2 was deposited by pyrolytic decomposition of peroxostannate solution. Hydrogen peroxide in starting solution contributes to the oxidation process of growth layers and to increase the electrical conductivity. Active electrochromic layer of WO3 was electrolytic deposited from the peroxotungstic acid solution. Optimal deposition time and the optimal annealing temperature of deposited layers were found. Passive electrochromic layer of V2O5 was deposited using dip-coating method from peroxovanadate solution. A contribution of solution diluted with distilled water was investigated. Found results were used to construct complete electrochromic device with polymer gel electrolyte.
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Determination of sound power level of transmission
Švanigová, Lenka ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
The field of vibrations and associated noises is a very current topic. Noise can be measured with different equipment and the gained data might be compared using different methods, which are in accordance with defined norms. This bachelor thesis deals with the CSN EN ISO 9614 norm, especially its first part which focuses on the method of measuring in points. To apply this method to measure the transmission, basic terminology and formulas used to determine the individual indicators were described in detail. The whole procedure was applied to two industrial transmission units with different parameters and transmitted power. The total sound power on these sources was determined as well as the sound power levels for the individual measured sides, even without using the A-filter, which is the most commonly used filter in transmissions. Lastly, acoustic maps were created. These maps make it possible to discover locations which dominantly contribute to the total sound power level.
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A boring head for a drill
Suda, Martin ; Kozáček, Peter (referee) ; Kočiš, Petr (advisor)
This bachelor thesis belongs to the field of machine tools and accessories. It deals with machining method of boring and mainly with instruments used for boring. The thesis is divided into a research and a practical part. In the practical part a boring head for drilling with eccentricly placed spindle is solved. Its movement on the circle mills the hole.
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