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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
181

Platforma pro měření atmosférických veličin / Platform for Measurement of Atmospheric Quantities

Hanák, Jiří January 2021 (has links)
This work is dealing with the design and implementation of an embedded system for aerology measuring. The aim of the system is to monitor atmospheric states during an ascent in the suspension under an meteorological balloon.   First of all, attention is given to the Earth's atmosphere and its quantities, then an overview of existing systems for performing aerological measurements. The core of the work is focused on the choice of measurement techniques and the selection of suitable measuring elements for a given scenario. The aerological probe is using atmospheric sensors HIH-8131-021-001, MS5611-01BA03 and PT1000-550 for temperature sensing, while GNSS data is received using the MAX-M8Q-0 module and the measured data is stored on a microSD card and transmitted in parallel using the MTX2-434.650-10 radio module. The system is controlled by STM32L1 from STMicroelectronics programmed in C using  HAL abstraction layer.
182

Vliv dýchání na barorecepční reflex / Influence of breathe to baroreceptor reflex

Humpolík, Tomáš January 2010 (has links)
This Master's thesis deals with the influence of breathe to baroreceptor reflex. The first chapter is focused on measuring of blood pressure, in reference to later used method. In the second part is detailed analysis and explanation of term baroreflex, relationship between frequency spectra of systolic blood pressure, heart rate and breathing, mechanisms of regulation of blood pressure and heart rate variability. Third chapter deals with possible ways, how to analyze data, which are needed for estimation of baroreflex sensitivity, analyze of heart rate variability and estimation of power spectral density. Next parts of this thesis is paid attention to technical equipment and methods of acqusition of data, using this equipmnent. Part of this work is also software application, which makes possible from the recorded data estimate baroreflex sensitivity.
183

Metoda napěťového kontrastu při detekci sekundárních elektronů scintilačním detektorem ve VP SEM / Voltage contrast method at detection of secondary electrons by scintillation detector in VP SEM

Jabůrek, Ladislav January 2011 (has links)
This thesis deals with scanning electron microscope working at higher pressure in the specimen chamber. The main goal was to study the voltage contrast on the PN junction of the transistor under suitable working conditions for using environmental scanning microscope. The observation of sample was enabled by a scintillation detector designed for observation of high pressure.
184

Automatizace trati pro měření vodních ventilů / Automation of track for measurement of water valves characteristics

Lekeš, Pavel January 2014 (has links)
My diploma thesis describes upgrade of flowbench serving as test rig for regulation valves characteristic measurement. At the beggining, there is an introduction to the water regulation valves theory followed by current machine condition description. Next chapter defines needed improvements and at the end follows proposition of improvements and necessary component definition and final realization. Final chapter summarizes complete project.
185

Automatizace trati pro měření vodních ventilů / Automation of track for measurement of water valves characteristics

Lekeš, Pavel January 2014 (has links)
My diploma thesis describes upgrade of flowbench serving as test rig for regulation valves characteristic measurement. At the beggining, there is an introduction to the water regulation valves theory followed by current machine condition description. Next chapter defines needed improvements and at the end follows proposition of improvements and necessary component definition and final realization. Final chapter summarizes complete project.
186

Vliv turbulentního modelu na simulace proudění vzduchu v okolí průtokoměru / Effect of the turbulence model for simulation of air flow around flowmeter

Vlček, Josef January 2014 (has links)
Purpose of this thesis is to check influence of turbulent model used for simulation of flow close to primary elementi inserted into piping. The goal is to check if results computed by these models are equal and how precise is their prediction.
187

Vyhodnocení provozu tlakové kanalizace vybrané obce / Assessment of operation of the pressure sewerage system

Ambrož, Martin January 2014 (has links)
This diploma work deals with description of pressure sewerage networks. First of all is focused on statistical evaluation of pressure sewerage operation in Káraný municipality where was evaluated waste water flow and pressure on sewerage network.
188

Statické zajištění kostela v Ludslavicích / Static securing of Ludslavice church

Kovalíková, Mária January 2015 (has links)
This thesis is drafting static protection church horizontal pretension, especially at the level of foundations and walls. Furthermore, the design of a new increase the stiffness of reinforced concrete towers and other prestress. The role was also producing construction drawings for the design of static security.
189

Tlumení tlakových pulsací v pružných potrubích / Damping of Pressure Pulsations in Elastic Pipes

Panko, Martin January 2008 (has links)
This diploma thesis deals with numerical simulation of pressure pulsations in elastic pipes. Continuity relation of fluid in elastic pipes, when calculating some damping in pipe material, is derived into practice. Rheological model of such a pipe corresponds to Voigt (Kelvin) model. For analysing dynamic effects in time periods are used numerical methods that deal with flow of compressible fluid: FTCS, Lax-Friedrichs and Lax-Wendroff method. The numerical results are confronted with the experiment. During the experiment simulation the method considers speed of sound in liquid like a function of pressure. This diploma thesis lays partial principles for finding elastic constants for describing dynamic characteristics of elastic pipes by measuring the pressure pulsations.
190

Výroba součásti technologií přesného stříhání / Fineblanking component and its manufacturing

Lata, Miroslav January 2010 (has links)
The diploma thesis deals with a propose of a new manufacturing technology of component called „KULISA“ drawing number 4-DP-05-10/01. The beginning of this work is prepared as a literary study about blanking. There are explained some basic concepts necessary to introduce a blanking topic. Other interest of this work is an assessment of actual state of conventional blanking technology which is being currently used for component production. With regard to the deficiencies of the existing method is proposed new technology of fine blanking. In the proposal is evaluated technological site of component construction and blanking tools are proposed with stress analysis included. Last part of the work deals with the economic evaluation, where is being compared efficiency of existing and new technology.

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