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Framework for a Web Internet Service
Hájek, Filip ; Smrčka, Aleš (referee) ; Hrubý, Martin (advisor)
The goal of this thesis is to design and implement a containerized web service, which provides the ability to create and run users' tasks. The task is only an abstraction over some particular implementation of computation. The task runs as a Docker container. The thesis also implements user management and the method of running task charging. The system architecture consists of a REST API web server and a user web environment. Worker applications are an essential component of the system. They start user tasks assigned by the server. The system was implemented using the .NET 6 framework in programming language C#. The run of the service has been simulated in a Docker environment. The service integrates existing Auth0 and Google Cloud Storage services. The result is an internet service deployed on a public cloud server.
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Preparation and characterization of Lu2Ir2O7 single crystals
Hájek, Filip ; Klicpera, Milan (advisor) ; Prchal, Jiří (referee)
Present thesis is focused on the synthesis and characterization of Lu2Ir2O7 single crystals as a part of a broader study of rare-earth A2Ir2O7 pyrochlore iridates, where A = Y, La-Lu. These materials, crystallizing in the geometrically frustrated pyrochlore lattice and with electronic properties being shaped by strong spin-orbit interaction, have attracted considerable attention of the condensed matter community. The investigation of Lu2Ir2O7 with nonmagnetic Lu3+ cations is crucial in order to reveal the physical properties connected to magnetism of solely the Ir sublattice. The physical properties connected to the Ir sublattice are essential for a proper interpretation of the complex properties of other A2Ir2O7 with magnetic rare-earth cations. For the first time, large good-quality Lu2Ir2O7 single crystals were synthesized by means of the flux method. Their stoichiometry and crystal structure were characterized by means of Laue diffraction and energy-dispersive X-ray technique. Magnetic properties were investigated employing magnetization measurements under ZFC and FC regimes. A bifurcation between ZFC and FC magnetizations was revealed at TIr = 130(1) K, indicating magnetic ordering of the Ir sublattice. Investigating single crystals, the anisotropy effects were studied for the first time. Significantly...
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General overview of GaN devices and transport properties of AlGaN/GaN HEMT structures - impact of dislocation density and improved design
Hulicius, Eduard ; Hájek, František ; Hospodková, Alice ; Hubík, Pavel ; Gedeonová, Zuzana ; Hubáček, Tomáš ; Pangrác, Jiří ; Kuldová, Karla
GaN-based nanostructures are used for many present semiconductor devices. The main topics are structures for blue LEDs and LDs, but there are also other interesting and important GaN devices namely for power electronics, scintillators and detectors as well as High Electron Mobility Transistors (HEMT). Reduction of dislocation density considerably increases electron mobility in 2DEG. All presented results support our expectation that a suitably designed AlGaN back barrier can help to prevent this phenomenon.
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Framework for a Web Internet Service
Hájek, Filip ; Smrčka, Aleš (referee) ; Hrubý, Martin (advisor)
The goal of this thesis is to design and implement a containerized web service, which provides the ability to create and run users' tasks. The task is only an abstraction over some particular implementation of computation. The task runs as a Docker container. The thesis also implements user management and the method of running task charging. The system architecture consists of a REST API web server and a user web environment. Worker applications are an essential component of the system. They start user tasks assigned by the server. The system was implemented using the .NET 6 framework in programming language C#. The run of the service has been simulated in a Docker environment. The service integrates existing Auth0 and Google Cloud Storage services. The result is an internet service deployed on a public cloud server.
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Deposit insurance in the European Union
Holá, Veronika ; Jakubík, Petr (advisor) ; Hájek, Filip (referee)
This thesis examines deposit guarantee schemes in the member states of the European Union. Our aim is to describe the present situation and analyze deposit insurance schemes in the context of financial safety nets. We focus mainly on cross-boarder issues and differences in deposit insurance coverage (scope, coverage limits). The paper deals mainly with changes of the rules which were introduced at the end of year 2008, and concerns with the amended Directive on Deposit Guarantee Schemes. Empirical analysis concentrates on the impact of state guarantees on the deposit grow rate in individual states. In the final part, we discuss the consequences of recent development and possible future progress.
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Mean-variance & mean-VaR portfolio selection : a simulation based comparison in Czech crisis environment
Parrák, Radovan ; Seidler, Jakub (advisor) ; Hájek, Filip (referee)
This thesis focuses on two methods for optimum portfolio selection. We compare Mean-Variance method with Mean-VaR method by the means of investment simulation, based on Czech financial market data from turbulent market periods of the year 2007 and the year 2008. We theoretically describe various approaches of optimum portfolio selection within a frame of Mean-Variance as well as Mean-VaR method. Furthermore, we highlight the similarities and differences of both strategies. Finally, we compare both strategies, basing on measurements of relative and absolute profitability of both strategies in crisis periods.
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