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Cambrian transtensional and Variscan normal fault related plutons: Tectonothermal evolution within the Teplá-Barrandian (Bohemian Massif, Czech Republic)
Dörr, W. ; Zulauf, G. ; Fiala, Jiří ; Franke, J. ; Haack, W. ; Philippe, U. ; Schastok, S. ; Scheuvens, J. ; Vejnar, Zdeněk ; Wulf, S.
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Study of transition layers in a gamma TiAl - CaO - Al2O3 SYSTEM
Dočekalová, Kateřina ; Dlouhý, Antonín ; Zemčík, L. ; Fiala, J.
The main attention in the present study focuses on the reactions between a ceramic crucible and the molten intermetallic alloy. The qualitative and quantitative metallographic analysis investigates the transition layers which are built during the melting process on the CaO-coated surface of the Al2O3 crucible. Preliminary results suggest that relevant chemical reactions are limited to a boundary layer with a characteristic thickness of 200 mm. In this layer, the high-temperature diffusion contributes to the nucleation and growth of complex phases the origin of which could result in an enrichment of the melt by oxygen.
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Quantitative image analysis of precipitates in Ni-rich NiTi shape memory alloys
Bojda, Ondřej ; Dlouhý, Antonín ; Fiala, J.
A microstructure of a Ti-50.7at%Ni shape memory alloy resulting from solution annealing and subsequent aging at 500°C/3.6ks/8MPa is quantitatively analysed. The TEM study is assisted by Adaptive Contrast Control (ACC) routines embedded in a recent image processing system. The assessment focuses on the number density, size and distribution of crystallographic variants of Ni4Ti3 precipitates. It was found that the distribution of crystallographic particle variants in the microstructure is inhomogeneous. The influence of the heterogeneous Ni4Ti3 precipitation on the characteristics of the martensitic transformation B2®B19´ is briefly discussed.
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Creep of intermetallic alloy TiAl at very low strain rates
Mareček, P. ; Kloc, Luboš ; Fiala, J.
Intermetallic alloys are very advanced materials for high-temperature applications. There are series of attractive properties exceed coventional up to now used creep resistance steels. The creep behaviour of TiAl alloy was investigated under an applied stress lower than 100 MPa at temperatures 700-850 °C. The strain rate was lower than 10-9 s-1 under testing conditions, which have importance for technical applications. In relation to results, the creep behavior of intermetallic alloy TiAl shows a transition to a mechanism with low stress exponent in the range of minimum strain rates, similar to creep resistance steels with evidence change of deformation mechanism under strain rate 10-10 s-1 . However, this transition in TiAl alloys is not as clear as in creep resistant steels.
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Asymetric information and a contract theory
Fiala, Jiří ; Tříska, Dušan (advisor) ; Bartoň, Petr (referee)
This diploma thesis discusses the problem of asymmetrically distributed information between economic agents who interact with each other. It describes the historical development of asymmetric information in economic theory. It mainly focuses on possible emergence of inefficiencies due to asymmetrically distributed information. It describes the model of adverse selection. The thesis also points out how it is possible to apply this model of adverse selection together with knowledge of contract theory to partly overcome these inefficiencies. The aim of the study is to show on concrete examples how to design optimal contract and how these optimal contract can minimize the impact of asymmetric information on economic efficiency.
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The current position of US in the world and its future
Fiala, Jan ; Jeníček, Vladimír (advisor) ; Jelínek, Jiří (referee)
Práce se soustředí na současný vývoj USA se zaměřením na jeho postavení spíše z hlediska toho, co toto postavení určuje, co stojí v pozadí za dosaženým úspěchem a co pomáhá získáné postavení udržet, popřípadě co ho ohrožuje. V první části jsou nastíněny základní charakteristiky USA pomocí vybraných ukazatelů. Následně práce rozebírá aktuální vývoj v USA, především dopady hypotéční a úvěrové krize a možný nástup recese. Druhá část je těžištěm této práce, popisuje a hodnotí faktory, které dle mého názoru, nejvíce přispěly k získání dominatní pozice USA, a zároveň ovlivňují a určují současné postavení. Prvním faktorem je dolar. S tématem dolaru jsou spjaty další dvě problémové oblasti USA ? mohutné zadlužení a deficit obchodní bilance, které budou krátce rozebrány. Třetím faktorem je vojenská dominance a politické postavení USA. Posledním analyzovaným tématem je technologická vyspělost, zdroj hospodářského růstu a vztrůstající životní úrovně.
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