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Evaluation of sample geometry effect on creep deformation progress using acoustic emission method
Dvořák, Jiří ; Sklenička, Václav ; Král, Petr ; Kvapilová, Marie ; Svobodová, M. ; Šifner, J. ; Koula, V.
This work deals with the determination of the influence of the sample geometry on the development of failure during creep exposure. Creep tests were carried out at temperature of 600 °C and a stress of 180 MPa in the protective atmosphere of argon. P92 steel samples with a conventional smooth surface and samples with a V-groove notch were chosen for the test tests. The results of creep resistance and fracture behaviour were complemented by detailed microstructural characterization to assess damage initiation and development. Based on the measured results, the creep data was evaluated using neural networks that systematically search for and process the signal from the acoustic emission (AE). Acoustic emission serves here as an effective non-destructive method for early prediction of the beginning of a possible accident of components of power and chemical plants.
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Aleš and Petr Holicky, Two Generations of Sternberks and Their Impact on Czech Political Scene in the First Half of the 15th Century
Koula, Vít ; Zilynská, Blanka (referee)
The exam for the doctorate thesis deals with two representatives of the Sternberk dynasty: Ales Holicky and his son Petr. Firstly, it focuses on Ales and his activities in Zikmund's camp. It surveys Sternberk's political programme, its fulfilment and goals. Further, it follows Ales's political orientation after the conversion to chalice in the beginning of the 30s of the 15th century and tries to cover the grounds for Ales's rise including the influence of the political coalitions of which he was a member. In that context, Ales's role in Ptacek's and Podebrad's party is explained as well as his part in formulating and promoting their demands. On the basis of the required findings, the thesis attempts to show who in fact profited from Ales's policy. Was it only Ales, respectively his dynasty, the utraquist coalitions of which he was a member, or the country as well? The thesis also tries to revise some conclusions of previous historiography, in which Ales's influence in the parties he was a member of as well as his ability of an independent conduct have been under evaluated. Having made a successful career in the revolutionary and difficult period of the first half of the 15th century, Ales should rightly rank among the significant, although not cardinal personalities of the period who deserve our attention....
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Creation of Web Sites Consider a Legal and Illegal Drugs.
Bartoňová, Jitka ; Klusoňová, Hana (advisor) ; Koula, Václav (referee)
Bartoňová Jitka Creating interactive websites conversant problems of dependecies Diploma thesis Charles University in Prague, fakulty of Pharmacy in Hradec Králové field of study: Pharmacy Background:The innovation of working system with informations concerned dependencies. The formation of logical articles database and its publication on an internet. Working with checklists, continuum maintaining of questionaire research, creating question forms on an internet and its scoring. Methods:Working with computer, studying programm Joomla, self generating guide to this programm. Results: Begining new website: www.zavislosti.ic.cz Conclusions: Online questionaire searching is place and time limitless, personally undemanding, easily workable, faster, cheaper and globally preferable to research trough the paper questionaire.
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Aleš Holický of Šternberk. Nobleman and politician of the post Lipany period
Koula, Vít ; Bobková, Lenka (advisor) ; Zilynská, Blanka (referee)
In my thesis I deal with Aleš Holický, a significant representative of the Šternberk clan, in the post Lipany period. On the basis of sources, I am trying to chart especially his political programme, its creation and the fulfilment of the goal he was pursuing. I follow up his political orientation after the conversion to the chalice in the beginning of 1430s and try to describe the basis of his rise including the influence of the political groups which he was a member of. In this context, I explain Aleš's role in Ptáček's and Poděbrad's party and his interest in formulation and enforcement of their demands. On the basis of the evidence collected, Aleš's contribution not just to Czech utraquism, Ptáček's party, Poděbrad's party (later Poděbrad's league), in which he acted, as well as for the whole country is evaluated at the end. Thus, I am trying to revise some conclusions of older historiography in which Aleš's influence in the parties he belonged to as well as his independent negotiations have been underestimated. In Aleš's persistent, purposeful activity and merits I can see the substantiation of his inclusion among the significant personalities of Czech history and politics of the 1430s - 1450s. In my thesis, I am following up both Aleš's political programme and his relations to his allies and...
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DETECTION OF DEFECTS BY ACOUSTIC EMISSIONS (AE) UNDER HIGH-TEMPERATURE CREEP CONDITIONS
Dvořák, Jiří ; Sklenička, Václav ; Král, Petr ; Kvapilová, Marie ; Svobodová, M. ; Šifner, J. ; Koula, V.
Current acoustic emission (AE) applications are preferably oriented to continuous monitoring of machine component operation. AE is a perspective non-destructive method for early prediction and identification of material defects to avoid a disaster of running equipment. The paper analyzes the measured data and analysis of signals at the level of individual emission events during the creep test of a copper based on the results of previously performed microstructural and fractographic analyses of its creep damage evolution and fracture. The aim of the model study is to contribute to the successful application of AE for real operating components of power equipments and thus to increase their operational safety.
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Aleš and Petr Holicky, Two Generations of Sternberks and Their Impact on Czech Political Scene in the First Half of the 15th Century
Koula, Vít ; Zilynská, Blanka (referee)
The exam for the doctorate thesis deals with two representatives of the Sternberk dynasty: Ales Holicky and his son Petr. Firstly, it focuses on Ales and his activities in Zikmund's camp. It surveys Sternberk's political programme, its fulfilment and goals. Further, it follows Ales's political orientation after the conversion to chalice in the beginning of the 30s of the 15th century and tries to cover the grounds for Ales's rise including the influence of the political coalitions of which he was a member. In that context, Ales's role in Ptacek's and Podebrad's party is explained as well as his part in formulating and promoting their demands. On the basis of the required findings, the thesis attempts to show who in fact profited from Ales's policy. Was it only Ales, respectively his dynasty, the utraquist coalitions of which he was a member, or the country as well? The thesis also tries to revise some conclusions of previous historiography, in which Ales's influence in the parties he was a member of as well as his ability of an independent conduct have been under evaluated. Having made a successful career in the revolutionary and difficult period of the first half of the 15th century, Ales should rightly rank among the significant, although not cardinal personalities of the period who deserve our attention....
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Aleš Holický of Šternberk. Nobleman and politician of the post Lipany period
Koula, Vít ; Bobková, Lenka (advisor) ; Zilynská, Blanka (referee)
In my thesis I deal with Aleš Holický, a significant representative of the Šternberk clan, in the post Lipany period. On the basis of sources, I am trying to chart especially his political programme, its creation and the fulfilment of the goal he was pursuing. I follow up his political orientation after the conversion to the chalice in the beginning of 1430s and try to describe the basis of his rise including the influence of the political groups which he was a member of. In this context, I explain Aleš's role in Ptáček's and Poděbrad's party and his interest in formulation and enforcement of their demands. On the basis of the evidence collected, Aleš's contribution not just to Czech utraquism, Ptáček's party, Poděbrad's party (later Poděbrad's league), in which he acted, as well as for the whole country is evaluated at the end. Thus, I am trying to revise some conclusions of older historiography in which Aleš's influence in the parties he belonged to as well as his independent negotiations have been underestimated. In Aleš's persistent, purposeful activity and merits I can see the substantiation of his inclusion among the significant personalities of Czech history and politics of the 1430s - 1450s. In my thesis, I am following up both Aleš's political programme and his relations to his allies and...
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Creation of Web Sites Consider a Legal and Illegal Drugs.
Bartoňová, Jitka ; Koula, Václav (referee) ; Klusoňová, Hana (advisor)
Bartoňová Jitka Creating interactive websites conversant problems of dependecies Diploma thesis Charles University in Prague, fakulty of Pharmacy in Hradec Králové field of study: Pharmacy Background:The innovation of working system with informations concerned dependencies. The formation of logical articles database and its publication on an internet. Working with checklists, continuum maintaining of questionaire research, creating question forms on an internet and its scoring. Methods:Working with computer, studying programm Joomla, self generating guide to this programm. Results: Begining new website: www.zavislosti.ic.cz Conclusions: Online questionaire searching is place and time limitless, personally undemanding, easily workable, faster, cheaper and globally preferable to research trough the paper questionaire.
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Proposal of parts manufacturing for air industry
Koula, Vojtěch ; Valášek, Petr (advisor) ; Brožek, Milan (referee)
The aim of the thesis is making the design process for the production of parts for the aerospace industry by bending. Forming technology is the perspective of manufacturing technology, what has frequent use in the aerospace industry. Part of this thesis is the experimental finding of maximum possible ram speed on press brake machine during bending of small radius to prevent cracking. Bending was performed on the press brake and possible cracks of the material were check by capillary fluorescence testing. These knowledge were applied in the design process for the manufacturing of parts and there was provided economic evaluation.
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