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Warm air heating systems in family houses
Jankůj, Josef ; Hejčík, Jiří (referee) ; Košner, Jan (advisor)
The aim of my work on the theme “Warm air heating systems in family houses” is to summarize used systems, it´s individual components, pass judgment on preferences and shortcomings of this systems. First part is oriented on general familiarization with air rating, examination advantages and disadvantages against classic warm-water system. Second part put mind to elementary systems of airing buildings, their parting and identification with their particular principle.
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Optimization of heavy steel castings manufacture
Jankůj, Josef ; Martínek, Ludvík (referee) ; Šenberger, Jaroslav (advisor)
The work deals with the occurrence of cracks and fissures in the massive steel castings produced in the ŽĎAS a.s. foundry which create in castings through the elimination of the extension. The influence on the final deoxidation on the creation of fissures and cracks is researched at the experimental samples. The beginning of the work is about teoretical analysis of these defects. Next it is described the place of the collection of these samples their chemical composition and cracks identification. After that it is evaluated the appearance of various defects in connection with modificatory and deoxidation additive, observation of experimental material with the microscope and the results of mechanical tests. The conclusion of the work belongs to sum up the individual results and proposal of optimal procedure.
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Optimization of heavy steel castings manufacture
Jankůj, Josef ; Martínek, Ludvík (referee) ; Šenberger, Jaroslav (advisor)
The work deals with the occurrence of cracks and fissures in the massive steel castings produced in the ŽĎAS a.s. foundry which create in castings through the elimination of the extension. The influence on the final deoxidation on the creation of fissures and cracks is researched at the experimental samples. The beginning of the work is about teoretical analysis of these defects. Next it is described the place of the collection of these samples their chemical composition and cracks identification. After that it is evaluated the appearance of various defects in connection with modificatory and deoxidation additive, observation of experimental material with the microscope and the results of mechanical tests. The conclusion of the work belongs to sum up the individual results and proposal of optimal procedure.
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Warm air heating systems in family houses
Jankůj, Josef ; Hejčík, Jiří (referee) ; Košner, Jan (advisor)
The aim of my work on the theme “Warm air heating systems in family houses” is to summarize used systems, it´s individual components, pass judgment on preferences and shortcomings of this systems. First part is oriented on general familiarization with air rating, examination advantages and disadvantages against classic warm-water system. Second part put mind to elementary systems of airing buildings, their parting and identification with their particular principle.
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Mechanical properties of optical thin films
Tomáštík, J. ; Čtvrtlík, R. ; Šebestová, Hana ; Schovánek, Petr ; Jankůj, J. ; Hrabovský, Miroslav
Mechanical properties of optical thin films and coatings are very important for their reliability, because they are often exposed to rough conditions in service. Mechanical attributes of films, that determine their behavior, are in the center of interest. In this paper, mechanical properties of optical thin films deposited on various types of glass substrates were examined. Assessment of such properties was performed using instrumented nanoindentation (hardness, elastic modulus, elastic and plastic work done by indentation) and scratch test (critical loads corresponding to the onset of specific failure). The failure modes of thin films were discussed.
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