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Design of Intelligent Network Module for 2D Radiation Data Acquisition
Lelek, Martin ; Polášková, Lenka (referee) ; Wilfert, Otakar (advisor)
This thesis describes about theoretical design and practical realization of self-contained module for intensity and absorbed dose measuring of X-Radiation from High Voltage X-RAY industrial sources. In the first part, thesis is focused on ways and solutions of radiation protection and principles of measuring absorbed dose and intensity of radiation and possibilities of sending measured data through sensor networks. In the second part, the complete schematic of measuring module is solved, critical blocks are tested and design of PCB is done. Detection circuit, blocks for optical and acoustic signaling, power management and control of the entire device are designed. Detection circuit uses a GM Tube. Next, main box of whole device is designed and made by 3D printing technology. The next step is putting hardware into operation and writing test firmware included verification of wireless communication through WiFi.
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Detection methods of energetic materials
Procházka, Michal ; Diviš, Pavel (referee) ; Friedl, Zdeněk (advisor)
A research on current methods of detection of explosives and related materials was made. At first the thesis studies methods of detection and analysis of explosives including chromatographic methods (TLC, GC, HPLC, IC), mass spectrometry and its variations, ion mobility spectrometry and infra-red spectroscopy. Next the attention is placed on detection of explosives in solid phase by X-ray detection, nuclear magnetic and quadrupole resonance and thermal neutron activation. Practical applications of these methods are of great importance in this thesis as well as their usage in the counterterrorist fight.
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Reliability of LED Panels Solder Joints
Šimon, Vojtěch ; Špinka, Jiří (referee) ; Starý, Jiří (advisor)
Thesis is focused on the effect of heating factor on quality of solder joints. In theoretical part is solved reflow soldering technology, problematice of solder paste choice or criteria of soldering profile setting. The practical part is dedicated to demonstrating the impact of heating factor on solder joint quality. There are used X-Ray analysis, microsections and electron microscopy. In the final part of this thesis are summarized knowledge from theoretical part and experimental obtained results to defend of next steps in diploma thesis.
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REBALLING OF BGA PACKAGES USING PACE TF2700 EQUIPMENT
Roháček, Peter ; Špinka, Jiří (referee) ; Starý, Jiří (advisor)
The Diploma thesis is focused on reballing of BGA packages with the device PACE TF 2700. It describes the general types of BGA packages, their defects, importance of thermal management to the solder techniques, where it is also talked about the meaning of solders and fluxes for the joint. The work informs about the most common methods of reballing, the proper handling of components and the current situation with BGA stencils on the market. It briefly describes the device operation of PACE TF 2700, that is working on the convection and IR principle of heating components. It deals with the manufacturing of the template, dummy BGA packages, the test plates, creation of the thermo profile, comparing and examining the defects and their causes, which had the most significant impact on the results. The achievements would serve for comparing them with the results of the future laboratory exercises or as a subject for further works.
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Construction of motorized filter changer for tomographic system Rigaku Nano3DX
Maleček, Lukáš ; Nožičková,, Dominika (referee) ; Zikmund, Tomáš (advisor)
X-ray computed tomography is a technique that finds widespread application nowadays. The initial use of this technique was mainly in medical diagnostics. The achievable accuracy of this technique has been progressively improved so much that today the computed tomography finds applications even in the field of industry. It is a non-destructive method of three-dimensional imaging of the internal structures of the examined objects. The quality of the resulting CT data is influenced by several factors. One of these factors is the property of X-rays, which we use for measurements. We are able to partially alter the properties of X-rays and thus obtain higher quality CT data, without the occurrence of some tomographic artifacts. The main way how we can change the properties of the generated X-rays is called additional filtration. This work deals with the study of X-ray spectra, based on which X-ray filters are optimized, to achieve the most efficient filtration. The main aim of this bachelor thesis is also the construction and production of a motorized changer of these filters, which should cause the speeding up the process of setting the whole CT measurement and allow the development of new computed tomography techniques.
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Modern trends in radiographic procedures and methods in defectoscopy
Skřivánková, Vendula ; Vlašic, František (referee) ; Juliš, Martin (advisor)
Presented thesis deals with modern trends and techniques in radiographic methods of crack detection which are recently used in engineering practice. In the first part, conventional (analogue) radiography principles based on creating a visible image of tested object to radiographic film are discussed. The next part is aimed to the digital radiography and radioscopy. To digitize existing X-ray film images, application of storage phosphor plates (CR), flat panels (DR) and computed tomography (CT).
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X-ray beam hardening effect simulation
Milek, Jakub ; Kolář, Radim (referee) ; Drastich, Aleš (advisor)
At the beginning of this work the physics related background and it’s interaction with matter is described, followed by explanation of filters influence on X-ray spectrum. Linear attenuation coefficient is described and so are other related physical quantities. In the end the description of a simulator is presented.
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Medical Center
Pospíšil, Václav ; Blažková, Vendula (referee) ; Daněk, Lukáš (advisor)
The subject of my diploma thesis is the design of a new medical center MEDCEN in the area of the Jihlava hospital, on plot no. 4374/1. The total land area is 22 706 m2. The building has three aboveground and one underground floor. The vertical bearing structure consists of masonry ceramic elements, which are complemented by a monolithic, water-reinforced concrete in the underground floor. Vertical peripheral structures are equipped with thermal insulation system, in the above-ground floors with ventilated facade. The vertical load-bearing structures are made of prefabricated reinforced concrete panels and reinforced by reinforced concrete beams at the local load. The whole building is designed flat single-skin roof with a classic order of layers, where the main waterproofing layer consists of plasticized PVC foils. The layout of the building is divided into left and right wing, which connects the central central part. The entire underground floor is designed to be operational, there are parking spaces for employees, storage facilities and technical facilities of the building. Individual offices, nurses and waiting rooms are designed on all above-ground floors. In the central central part are designed sanitary rooms for visitors and employees. On the first floor is a pharmacy and X-ray examination room. On the third floor there are two office management offices and one-day surgery premises.
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Optimization of X-ray computed tomography method for imaging of low-density materials
Maleček, Lukáš ; Oberta, Peter (referee) ; Zikmund, Tomáš (advisor)
X-ray computed tomography is a technique enabling three-dimensional non-destructive imaging of the internal structure of measured objects. This imaging method has become a standard tool utilized in various fields, including medicine, industry, and science. Conventional X-ray computed tomography is based on the absorption of X-rays as it is passing through the measured object. However, this conventional imaging approach has its limitations, particularly when imaging objects with low density that causes only low X-ray attenuation. In such cases, sufficient contrast between the measured object and the background is not achieved. This thesis focuses on the optimization of phase contrast imaging, which utilizes phase changes of radiation as it is passing through the sample to overcome the limitations of absorption-based computed tomography. The detection of phase changes is achieved in the thesis using the propagation-based method. The main goal is to develop a methodology for finding the optimal parameters for the acquisition of tomographic data and also for the following processing of obtained X-ray projections. The results are qualitatively and quantitatively evaluated to assess the benefits of the developed methodology.
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