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Temporally and spatially resolved diagnostics of an electric arc
Holcner, Oldřich ; Šimek, David (referee) ; Kloc, Petr (advisor)
This batchelor thesis "Temporally and spatially resolved diagnostics of an electric arc" deals with the investigation of plasma temperature in an arc formed by evaporation of copper wire. It is an optical method based on determination of temperature from intensity of spectral lines. In this batchelor thesis we explain how spectral lines are formed and how to determine the temperature. In the practical part we process discharge and show the time evolution of temperature at the measured points.
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Implementation of algorithm for energetic material measurement in FPGA device
Slovák, Jiří ; Moravec, Jaroslav (referee) ; Maršálek, Roman (advisor)
In the text of the master´s thesis, it is at first briefly referred about Energetic Material Measurement topic in general. Emphasis is placed especially at the description of the Velocity of Detonation and short analysis of selected measurement method. The most significant part of the paper is dedicated to the design and description of the system that was created in ISE Design Suite environment using VHDL language. The development was performed with respect to oncoming integration into the board with FPGA and A/D converters. The operation of detection algorithm which was created based on the MATLAB model was verified in the final part of the thesis by simulation of processing of real optical probe signals.
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Design and realization of experimental equipment for determination of residual stress of bent samples
Novotný, Lukáš ; Návrat, Tomáš (referee) ; Krejčí, Petr (advisor)
The master thesis is focused to design and realization of experimental equipment for researching of residual stress determination for specimen with non-uniform distribution stress along the depth. Literature search study of problematic was performed and it was used for elaboration of chapters about origin of residual stress, their classification and chapters about methods, which are used for measuring of residual stress and their determination. The following part explains the design of experimental equipment and stress-strain analysis of selected parts of this equipment. Then the final design of equipment is presented, including complete production drawings, and it’s explained final assembling of experimental equipment. Final chapter is devoted to examinable loading of specimen.
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Optical evaluation of corrosion products using colorimetric spectroscopy
Majtás, Dušan ; Fialová, P.
Aim of this work is to test possibility to utilize colorimetric spectroscopy for monitoring the corrosion of lead and tin-lead alloys. And furthermore method suitability for preliminary corrosion evaluation of cultural heritage objects. According to literature colorimetry is used to monitor patinas of bronze objects, thus the method might be also suitable for lead based alloys. Samples used were made from commercially produced lead plate. These were exposed in the climatic chamber to different relative humidity (60, 80, 90 %). After the exposure the corrosion products with different color formed on sample surface. These corrosion products were evaluated by different methods: optical microscopy, colorimetric spectroscopy, and X-ray chemical analysis. Collected colorimetric data display difference between treatments suitable for patina evolution monitoring. The paper presents obtained results and comparison of applied methods.
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Temporally and spatially resolved diagnostics of an electric arc
Holcner, Oldřich ; Šimek, David (referee) ; Kloc, Petr (advisor)
This batchelor thesis "Temporally and spatially resolved diagnostics of an electric arc" deals with the investigation of plasma temperature in an arc formed by evaporation of copper wire. It is an optical method based on determination of temperature from intensity of spectral lines. In this batchelor thesis we explain how spectral lines are formed and how to determine the temperature. In the practical part we process discharge and show the time evolution of temperature at the measured points.
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Design and realization of experimental equipment for determination of residual stress of bent samples
Novotný, Lukáš ; Návrat, Tomáš (referee) ; Krejčí, Petr (advisor)
The master thesis is focused to design and realization of experimental equipment for researching of residual stress determination for specimen with non-uniform distribution stress along the depth. Literature search study of problematic was performed and it was used for elaboration of chapters about origin of residual stress, their classification and chapters about methods, which are used for measuring of residual stress and their determination. The following part explains the design of experimental equipment and stress-strain analysis of selected parts of this equipment. Then the final design of equipment is presented, including complete production drawings, and it’s explained final assembling of experimental equipment. Final chapter is devoted to examinable loading of specimen.
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Implementation of algorithm for energetic material measurement in FPGA device
Slovák, Jiří ; Moravec, Jaroslav (referee) ; Maršálek, Roman (advisor)
In the text of the master´s thesis, it is at first briefly referred about Energetic Material Measurement topic in general. Emphasis is placed especially at the description of the Velocity of Detonation and short analysis of selected measurement method. The most significant part of the paper is dedicated to the design and description of the system that was created in ISE Design Suite environment using VHDL language. The development was performed with respect to oncoming integration into the board with FPGA and A/D converters. The operation of detection algorithm which was created based on the MATLAB model was verified in the final part of the thesis by simulation of processing of real optical probe signals.
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Assessment of differential number of leukocytes in automatic analyzer and microscopically
BAMBULOVÁ, Iva
Evaluation of blood count with differential leukocyte budget is a basic haematological test. From a diagnostic point of view is the information about the exact number of leukocytes and their percentage representation in the patient's blood very valuable as well as a range of informations on the effect of disease states. In my bachelor´s thesis I devote to instrumentative and microscopic examination of the differential leukocyte budget and their comparing in terms of difficulty and obtaining the most accurate results. Nowadays, with the development of science and technology are used to determine differential leukocyte budget modern haematological analyzers, but the manual setting by using a microscope remains the basis of good work in haematological laboratory. The goal of each laboratory determination is to produce accurate results for clinical use. The analyzes are mostly automatic and their advantages are faster pace of analysis, accuracy, reliability and need of small volume of sample. The main objective of my thesis is to evaluate the distinction by using two different methods, microscopical and instrumentative. The thesis is traditionally divided into theoretical and practical part. The theoretic part of the thesis explains the meaning of the differential leukocyte count, there is a detailed morfology description of different leukocyte types. I mentioned the non-neoplastic and neoplastic changes in the number of leukocytes. Last but not least, there is an overview of laboratory methods that are used for blood counts in routine haematological laboratory. To determine differential leukocyte budget is used optical method, electrical impedance method, cytochemical method or digital morphology. The practical part describes the examination methodology of the differential leukocyte budget, which I have used in this work. I made a blood smear by microscopic assessment, which I dyed according the instructions. Preparates are viewed with oil immersion under a light microscope. To record different leukocyte types are used recording devices - leucomats. I made automatic assessment of differential leukocyte budget in 5 - population haematological analyzer Sysmex XE - 2100 based on the principle of flow cytometry with sample measurements from the feeder closed or open way. Examination of differential leukocyte budgets was realized in biochemical and haematological laboratory synlab czech s.r.o in Czech Budweis. Here I investigated 100 randomly selected patient samples of venous blood under the proffesional supervision and I compared the differential leukocyte budgets and differences between methods. I investigated samples in April and May of 2012. Results obtained by microscopic examination and by measurements on analyzer were statistically compiled into tables and graphs in a computer program. In the graphical representation comparing the differential cell counts in 100 samples of the budget of the analyzer under a microscope. I set the hypothesis that the numbers of microscopic differentials equal to those of the automatic analyzer. Laboratory results were obtained by the measurement and that results were interpreted after consultation with the supervisor. Based on the results, I rejected the hypothesis. Own laboratory investigation showed that classic microscopic assessment has essential importance in the analysis of pathological cells. It also depends on the experience of the laboratory worker. The advantages of the haematologic analyzer are particularly rapid analysis, accuracy and need of small volume of biological sample. During the practical part of the thesis I gained practical skills in working with biological material and I embraced the principles of laboratory methods. The results of my work can be used widely in clinical laboratories in assessing the advantages and disadvantages of relationships between monitored by analytical methods.
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