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ACP Protocol in Payment Systems
Kunc, Jaroslav ; Burda, Karel (referee) ; Strašil, Ivo (advisor)
Bachelor's thesis focuses on the protocol for the cryptographic systems in payment systems developed for ÚTKO. The thesis analyses now used protocols for electronic payment systems. The thesis describes the basic principle of AAA protocols (Authentication, Authorization and Accounting) and the basic principle of ACP protocol. The thesis includes a discussion of the objectives of the new system for payment transactions and discussion about anonymity of this transactions. The next object of this thesis is to develop scenarios inclusive protocol ACP in electronic payment systems and evaluate this scenarios.
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Fabrication and characterization of atomically thin layers
Tesař, Jan ; Kunc, Jan (referee) ; Procházka, Pavel (advisor)
Tato práce se zabývá oblastí dvourozměrných materiálů, jejich přípravou a analýzou. Pravděpodobně nejznámějším zástupcem dvourozměrných materiálů je grafen. Tento 2D allotrop uhlíku, někdy nazývaný „otec 2D materiálů“, v sobě spojuje neobyčejnou kombinaci elektrických, tepelných a mechanických vlastností. Grafen získal mnoho pozornosti a byl také připraven mnoha metodami. Jedna z těchto metod však stále vyniká nad ostatními kvalitou produkovaného grafenu. Mechanická exfoliace je ve srovnání s jinými technikami velmi jednoduchá, takto připravený grafen je však nejkvalitnější. Práce je také zaměřena na optimalizaci procesu tvorby heterostruktur složených z vrstev grafenu a hBN. Dle prezentovaného postupu bylo připraveno několik van der Waalsových heterostruktur, které byly analyzovány Ramanovskou spektroskopií, mikroskopií atomových sil a nízkoenergiovou elektronovou mikroskopií. Měření pohyblivosti nosičů náboje bylo provedeno v GFET uspořádání. Získané hodnoty pohyblivosti prokázaly vynikající transportní vlastnosti exfoliovaného grafenu v porovnání s grafenem připraveným jinými metodami. V práci popsaný proces přípravy je tedy vhodný pro výrobu kvalitních heterostruktur.
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ACP Protocol in Payment Systems
Kunc, Jaroslav ; Burda, Karel (referee) ; Strašil, Ivo (advisor)
Bachelor's thesis focuses on the protocol for the cryptographic systems in payment systems developed for ÚTKO. The thesis analyses now used protocols for electronic payment systems. The thesis describes the basic principle of AAA protocols (Authentication, Authorization and Accounting) and the basic principle of ACP protocol. The thesis includes a discussion of the objectives of the new system for payment transactions and discussion about anonymity of this transactions. The next object of this thesis is to develop scenarios inclusive protocol ACP in electronic payment systems and evaluate this scenarios.
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In-situ Raman spectroelectrochemistry of graphene and related materials in concentrated aqueous electrolytes
Abbas, Ghulam ; Frank, Otakar (advisor) ; Kunc, Jan (referee) ; Voiry, Damien (referee)
The complex interplay between the material's properties and the electrochemical process often taking place at its ubiquitous edges makes it difficult to discriminate the role of single defects in the charge transfer processes in the material. Therefore, we have performed in-situ μ-droplet Raman spectroelectrochemistry (SEC) to identify the localized charge transfer processes through the basal plane and defects in a selected localized area of 10-20 μm2 of defect-free and defective monolayer graphene. It is noticed that two distinctive electron transfer processes of slower and faster rates exist side-by-side in the same sample but they are confined in the defect-free and defect-rich regions, respectively. Furthermore, in order to explore the electrochemical ion intercalation mechanism for rechargeable batteries, in-situ Raman SEC in a macro SEC cell was performed. It was observed that structural properties such as the lateral domain size (La), degree of graphitization (g), inter-defect distance (LD) and defect density (nD) have substantial influence on the electrochemical (de)intercalation of anion into natural and kish graphite during charge/discharge process. It was also revealed that ultrasound treatment of natural graphite reduces the La which enhances the reversibility of the anion...
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Deastination Management : Case Study the Luhačovské Zálesí region
Dvořáčková, Terezie ; Fialová, Dana (advisor) ; Kunc, Josef (referee)
The diploma paper concentrated on organization tourism so-called destination management. In the theory framed is captured all significant principles on which are based destination management and also activities and duties which include destination company. And another aspects are included which deal with organization tourism as principles divided into smaller nature unita. The case study deals with working destination management on level region Luhačovské Zálesí. Yet other attractions on tourism are researched which could spread dominant focus on balneology. Attention is concentrated on two unused potential areas which are presented in locality of dam near Luhačovice and rural municipality this region, where are preserved objects captured culture and history heritage. Key words: Tourism, Destination Management, Destination Company, Balneology, Nature Trail, Regionalisation, Revitalization, Rural Tourism
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Growth of graphene by thermal decomposition of silicon carbide for applications in biophysics
Hodoš, Matúš ; Kunc, Jan (advisor) ; Čechal, Jan (referee)
This bachelor thesis is focused on growth and characterization of graphene from SiC powder at different conditions. In the introduction graphene properties are briefly described. Afterwards three methods of graphene growth are discussed, with particular emphasis on thermal decomposition of SiC. Further, the characterization methods which were used by us are explained. In experimental part, three sets of graphene samples prepared by thermal decomposition of SiC will be described, each will differ in one of the factors: temperature, time and ambient atmosphere. Growth samples will be subsequently used in an experiment on yeast. The effect of graphene prepared at different conditions on membrane potential will be determined for possible application in biophysics.
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Cuban dissidents in Cuba and in exile. Origin, present state and development of resistance against the regime of Fidel Castro
Ferrarová, Miroslava ; Kunc, Jiří (advisor) ; Zbořil, Zdenek (referee)
Ve své práci jsem se snažila postihnout nejen nynější situaci kubánských disidentů a exulantů, ale také širší výseč historie tohoto ostrova, která může vysvětlit řadu otázek, jež byly v hlavním textu vzneseny. Pro pochopení situace opozice (nejen) na Kubě je nutné poznat, jak se Kubánci formovali jako svébytný národ, odkud pramení jejich animozita ke Spojeným státům americkým, proč v zemi zvítězil komunistický režim, ačkoliv Castro v době, kdy zahájil revoluci nebyl marxistou. Proč skončil, obrazně řečeno, v náruči Sovětského svazu a proč se režim po roce 1989 nezhroutil jako ve většině zemí socialistického bloku. Práce je proto rozdělena na šest základních oddílů, poměrně značný prostor jsem věnovala Fidelu Castrovi, bez jehož osoby by Kuba dnes zřejmě vypadala úplně jinak. Neopominutelná část je věnována také kubánskému exilu, který s disentem úzce souvisí (řada exulantů byli původně disidenty). Exil navíc poskytuje opozici přímo na ostrově materiální i duchovní pomoc. Z disidentských skupin jsem pro přehlednost v hlavním textu jmenovala pouze nejdůležitější, další jsou vypsány v příloze. Důvodem je jejich a roztříštěnost. V Závěru jsem se pokusila nastínit možné scénáře vývoje na Kubě. Powered by TCPDF (www.tcpdf.org)
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Interaction of short-wavelength laser pulses with matter on various time scales
Vozda, Vojtěch ; Kunc, Jan (advisor) ; Caha, Ondřej (referee) ; Timneanu, Nicusor (referee)
An advent of powerful sources producing intense and ultrashort laser pulses containing high-energy photons opened up a wide range of possibilities to conduct experiments formerly achievable only through theoretical calculations and models. This thesis provides a complex overview of processes which occur right after arrival of the first photons, through lattice heating, up to resolidification and formation of irreversible changes. Irradiated spots and craters formed in various materials are examined employing a wide range of microscopic and spectroscopic methods which provide a deep insight into laser-induced modifications such as detachment of a graphene layer from SiC substrate or thermally-induced diffusion of tellurium inclusions through CdTe lattice. An increased emphasis is placed on beam characterization utilizing ablation and desorption imprints in suitable solids. A proper knowledge of the beam fluence profile may serve for evaluation of diverse damage thresholds as well as for modelling of the pulse propagation or consequent retrieval of otherwise unmeasurable opacity of warm dense aluminium plasma heated to temperatures exceeding tens of thousands of Kelvins. Moreover, the method of desorption imprints is extended to accurate characterization of pulses delivered at MHz repetition rate....
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Spa tourism in Poděbrady
Hlavička, Tomáš ; Fialová, Dana (advisor) ; Kunc, Josef (referee)
10 Abstract This diploma work deals with analysis of spa in the city of Poděbrady, its development, state and it also shows possible trends of its future development. Concepts of destination lifecycle, sustainable capacity of tourism, concept of social attitudes - social respond to tourism and interaction between the locals and tourists, and theory of sustainable development of tourism have served as a theoretical framework of this work. Methodology of this work is based on questionnaire research conducted at three levels - among patients, among spa staff and among owners of individual accommodation facilities in Poděbrady. Out of three spa facilities only a company Lázně Poděbrady a.s. showed good will to participate, therefore the outcomes present in particular this spa. Patients on which the company Lázně Poděbrady, a.s. was preferably supposed to concentrate were identified as individual target groups. Further source of information were also moderated interviews with persons concerned in the city development, i.e. local authority, representatives of Lázně Poděbrady, a.s. or owners of individual hotels involved in the local inquiry. Also a review from available Czech and foreign literature and internet information served important source of information. The aim of this work is an effort to identify the...
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