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Analysis of high-speed induction motor
Klíma, Jiří ; Ondrůšek, Čestmír (referee) ; Vítek, Ondřej (advisor)
This thesis deals with the problem of the high-speed induction machines. In the introduction the design of the machines and problem areas are discussed. The feeding from the frequency converter and the mechanical strength of the rotor appear to be the biggest problem. High-speed engines with solid rotors were designed. The first model is equipped with a conductive cooper layer on the surface. This model is exposed to harmonic and non-harmonic input voltage and then the results of the simulations are compared. The following model of the thesis is equipped with axial slots. In the practical part of the thesis no load measurement is taken. One point was measured at nominal frequency. At the end of the thesis the results of the measurements are compared with the results of the figures extracted from Maxwell software.
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Study of the relations between the structure and function of C - terminal vanilloid receptor TRPV1
Gryčová, Lenka ; Obšil, Tomáš (advisor) ; Heřman, Petr (referee) ; Urbánková, Eva (referee) ; Krůšek, Jan (referee)
Transient receptor potential channel vanilloid receptor subunit 1 (TRPV1) is a thermosensitive cation channel activated by noxious heat as well as a wide range of chemical stimuli. Although ATP by itself does not directly activate TRPV1, it was shown that intracellular ATP increases its activity by directly interacting with the Walker A motif residing on the C-terminus of TRPV1. In order to identify the amino acid residues that are essential for the binding of ATP to the TRPV1 channel, we performed the following point mutations of the Walker A motif: P732A, D733A, G734A, K735A, D736A, and D737A. Employing bulk fluorescence measurements, namely a TNP-ATP competition assay and FITC labeling and quenching experiments, we identified the key role of the K735 residue in the binding of the nucleotide. Experimental data was interpreted according to our molecular modelling simulations. Calmodulin (CaM) is known to play an important role in the regulation of TRP channels activity. Although it has been reported that CaM binds to the Cterminus of TRPV1 (TRPV1-CT), no classic CaM-binding motif was found in this region. In this work, we explored this unusual TRPV1 CaM-binding motif in detail and found that five residues from a putative CaM-binding motif are important for TRPV1-CT's binding to CaM, with arginine R785...
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Economic evaluation and risk analysis building technology
Krzyžanek, Michal ; Fotr, Jiří (advisor) ; Beranovský, Jiří (referee)
Thesis is intent on economic analysis and risk analysis building technology, used at reducing energy costingness. Basic goal of this thesis is evaluating selection energy - saving building technology for concrete investment project at authority two principles. First principle is complying with time influence namely how in view of financial resources, so in view of price energy. Second principle is consequential complying with risk and uncertainties particular factors. In case of these thesis it means simulation crucial factors as a stochastic model. To these purposes will be used method Monte Carlo. Theoretical part of thesis be engaged in characterization economics analyses and risk analyses investment project. Information betray into theoretic parts will applied on concrete investment project, reconstruction residential building using energy - saving technology that contribute by to decrease energy costingness of all building. Fundamental of the investment project is reducing costs on heat a hot water. Goal of practical parts this thesis is give to data for decision making house owners about reconstruction house, regarding particular building technologies.
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Mechanisms for operating system virtualization
Děcký, Martin ; Tůma, Petr (referee) ; Yaghob, Jakub (advisor)
Overview and taxonomy of the technologies used for virtualizing the execution of operating systems (running multiple operating systems or multiple separated operating system contexts simultaneously on a single computer), comparsion of the speed, security, determinism, level of isolation, accounting posibilities, supported platforms, level of hardware emulation, etc. Inherent problems of virtualization (platform dependency, SMP, virtual hardware). Emulation, simulation, virtual machines, paravirtualization, partitioning. Overview of commonly available virtualization products (Bochs, QEMU, Simics, VMware, Virtual PC, Virtual Server, OpenVZ, Denali, Mac on Linux, PearPC, Plex86, Xen, TRANGO, UML, Linux VServer, FreeBSD Jails, Solaris Zones) and their comparsion. Hardware assisted virtualization (Power Hypervisor, V86, Vanderpool, Paciffica) and their usage. Practical demonstration of soft-partitioning (parcelling of the operating system into separate kernel contexts) on SPARTAN kernel.
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The aplication of CSS in swimming flume
Cagaň, Štěpán ; Jurák, Daniel (advisor) ; Chrzanowská, Babeta (referee)
Title: Application of CSS (Critical Swimming Speed) in the swimming flume. Objectives: Purpose of our pilot study was to find out, if load during swimming on speed of anaerobic threshold in the flume on level validated by accredited workplace corresponds with load during swimming in the swimming pool. Methods: For verification of our purpose, for each proband we first determined speed of anaerobic threshold, using Critical Swimming Speed protocol. Subsequently we monitored values of blood lactate and heart rate during swimming on anaerobic threshold speed level in the pool and thereafter in the flume. We have compared measured values. Results: We found out, that load in the flume is much lower, than load in the pool. We also found out, that stream of water in flume is not constant. Keywords: flume, swimming, swimming simulator, lactate, front crawl stroke, critical swimming speed
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Energy evaluation of apartment building.
Fečer, Tomáš ; Horák, Petr (referee) ; Adam, Pavel (advisor)
A goal of this Master's Thesis is an energy audit of an apartment building situated in Brno, the southmoravian region. The theoretical part is focused on a Czech Republic legislation, methods of an energy evaluation of houses and injurants of an internal microclimate. In the next part the main focus is on a processing of the energy audit of the apartment building. One of details of this processing is a design of precautions. From these, variants are created, focusing to choose the most economical and ecological one. The last part of this Master's Thesis is devoted to an usage of available software applications. Here are described computer programs, used for a creation of a 3D model. Also, a description of a calculation of thermal loses and the calculation of coefficients of heat transfer using a quasi-stationary technique is present. At the end a detailed description of one year simulation of the apartment building is provided.
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The evaluation of critical factors for the BTT method measurement
Maturkanič, Dušan ; Košina, Jan ; Hodboď, Robert
The report describes an analysis of critical factors occurred during the Blade Tip-Timing method measuring. These factors are represented by speed fluctuation of model turbine wheel and accuracy of sensors of the vibrodiagnostic system. This analysis is focused on evaluation and comparison of these items in different conditions. Subsequently, the results can be used for the simulations of vibration of turbine blades.
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Optimization of Signalling Traffic in IMS Subsystem of NGN Networks
Nagy, Ľuboš ; Orgoň, Miloš (referee) ; Bezpalec, Pavel (referee) ; Novotný, Vít (advisor)
One of causes of increased latency service over the whole IMS network can be unbalanced SIP (Session Initiation Protocol) signalling traffic through CSCF (Call Session Control Function). This thesis is devoted to the proposal of weight-based load balancing algorithm which can be used for the S-CSCF assignment performed by I-CSCF during the initial registration procedure of subscribers over the IMS architecture. The designed mechanism is implemented and evaluated in the mathematical model of IMS subsystem based on single servers with FIFO queues with the unlimited capacity in the numerical computing environment - Matlab. Two test-cases with different performance conditions of available S-CSCFs are described. The influence of measured latency affected by performance of other nodes (e.g. P-CSCF, I-CSCF, HSS, etc.) is minimized. Each of simulated test-cases is measured with various service times of SCSCFs and inter-arrival times. The obtained results of designed algorithm are compared with well-known selection algorithm – the round-robin algorithm. It is shown that new selection mechanism improved the service latency of whole IMS network. The possible weakness of the designed weight-based algorithm is sensitivity to traffic model over the modelled IMS architecture.
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Signal Integrity Optimization Techniques for High-Speed Chips Signaling
Ševčík, Břetislav ; Štork, Milan (referee) ; Horský, Pavel (referee) ; Brančík, Lubomír (advisor)
Tato disertační práce je obsahově zaměřená na problematiku integrity signálů v moderních čipových obvodech. Na základě provedených simulací a praktických experimentů byl proveden návrh equalizační techniky druhého řádu pro efektivnější vysokorychlostní komunikaci. Předložený návrh respektuje současné požadavky na vyvíjené signalizační techniky, které zahrnují efektivnější využití šířky pásma přenosového kanálu a energetickou úsporu. Provedené analýzy podrobně ukazují možnost zvýšení přenosové rychlosti při přenosu signálu skrz nízkonákladové přenosové kanály s využitím navržené signální metody. Výkonnost navrhované signalizační techniky je demonstrována na různých typech přenosových kanálů s přenosovou funkcí vyššího řádu. Diskutovány jsou rovněž možnosti omezení rušivých vlivů na přenosové kanály během návrhu.
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Wind resource assessment for selected sites in the territory of the Czech Republic
Hanslian, David
This set of studies analyses the wind conditions and expected wind power production at selected sites in the Czech Republic. At first, the calculation of wind conditions by VAS/WAsP 1, VAS/WAsP 2 and PIAP models is performed. Based on the comparison and analysis of model results, the generalized wind climate pertaining to the assessed site is estimated. The final results are calculated by WAsP model using this generalized wind climate. The expected wind power production of proposed wind turbine or wind farm is calculated as well as the map of simulated average wind speed and potential wind turbine production over the surrounding area. The uncertainty analysis is performed as well. This set consists of 6 partial reports.
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