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Business contract concluded with consumers
Vavroušková, Barbora ; Liška, Petr (advisor) ; Patěk, Daniel (referee)
This thesis deals with the legal regulation of contracts concluded with consumers contained mainly in the Civil Code under the provisions on obligations under contracts concluded with consumers. It starts with a brief overview of historical development of consumer protection legislation. This is followed by an analysis of basic concepts, specifically definition of consumer and the trader, and also description of commercial contracts concluded with consumers. Following this, the work provides a complex overview of the relevant Czech legislation. Subsequently, the thesis focuses on the analysis and evaluation of the general rules of the process of concluding contracts with consumer in the Civil Code and also an analysis and evaluation of current legal regulation of contracts on financial services concluded with consumers by distance form. Specifically, it deals within the general rules of the consumer contract process, information obligation of the trader, rules on the interpretation of the content of consumer contracts, prohibited terms in consumer contracts and specific rules on withdrawal of consumer from the contract. Within the framework of the financial services contracts legislation concluded by distance, the following analyses the provisions on the information obligation of the trader and on...
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Public procurement in the decisionmaking practice of the Office of Public Procurement and the case law of the ECJ
Ptáček, Přemysl ; Horáček, Tomáš (advisor) ; Liška, Petr (referee)
Public procurement in the decision-making practice of the Office of Public Procurement and the case law of the ECJ Abstract This thesis deals with the issue of public procurement and is focused primarily on the decision-making practice of the Office for the Protection of Economic Competition and the Court of Justice of the European Union. The thesis contains a critical analysis of several decisions, which were chosen, in particular for their possible impact on the practice of public procurement, as well as for their recency. The introductory part of the thesis is primarily theoretical. In the first chapter, the basic sources of law are described, while in the second chapter, definitions of the most important basic terms of the Act on Public Procurement are described. The third chapter describes the procedural options for defense against incorrect procedure of the contracting authority. The role of the Court of Justice of the European Union in these proceedings is also mentioned. The key part of the thesis is the fourth chapter, which contains a critical analysis of selected recent decisions (mostly from 2022 and 2023). In particular, the possible impact of the analyzed decisions on the practice of public procurement as well as proposals for a suitable de lege ferenda change in the legislation are described,...
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Legal regulation of dietary supplements advertising
Šotolová, Barbora ; Patěk, Daniel (advisor) ; Liška, Petr (referee)
5 Legal regulation of dietary supplements advertising Abstract The thesis analyses and summarizes the legal regulation of dietary supplements advertising. It deals with the assessment of the effectiveness of the current legal regulation in the given area from the point of view of consumers, as the most frequent addressees of advertising and tries to answer the question whether this regulation provides sufficient protection for consumers or whether it rather restricts them too much from receiving valuable information. The issue is also approached through the lens of food business operators and the question is raised whether the strictness of the legal regulation does not exclude or excessively prevent them from advertising a dietary supplement. In the first chapters, the dietary supplement is characterised, while an introduction to the legal regulation of dietary supplements as such is defined. This is followed by a definition of advertising and its typical aspects and an introduction to the legal, as well as extra-legal, instruments for its regulation. The core of the thesis is in third chapter, which deals with the analysis of the individual rules set out in the Advertising Regulation Act No 40/1995 Coll. and the relevant directly applicable EU regulations, as these rules are specific to the field of...
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Specifics of bank insolvency proceedings
Berger, Petr ; Tomášek, Petr (advisor) ; Liška, Petr (referee)
Specifics of bank insolvency proceedings Abstract The diploma thesis deals with the specifics of bank bankruptcy with the aim of analytically evaluating the current legislation. The thesis is divided into four parts. The first part deals with the general legal regulation of the bank and other related institutes such as the banking license or the protection of the bank's business name. It also deals with banking supervision, which is exercised by the Czech National Bank and is extremely important during the bank insolvency proceedings. The next section discusses the specifics of bank bankruptcy proceedings. The part is divided into several chapters. Bank insolvency proceedings are specific from the filing of the insolvency petition, which is discussed in the first chapter. The second chapter deals with the only possible way to resolve a bank's insolvency, which is through bankruptcy. The bank insolvency administrator, which is the subject of the next chapter, is specific in terms of the expertise required by the legislation. The last chapter then mentions the specificities arising in the course of bank insolvency proceedings and is divided into 5 points. These points describe the special information obligation, claims arising from the accounts, priority satisfaction of certain claims, the special procedure...
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Preparation and characterization of optically active nanorods
Gaizura, Filip ; Liška, Petr (referee) ; Dvořák, Petr (advisor)
This work focuses on the qualitative study of the preparation and optical characterization of CsPbBr3 perovskite nanorods. The first part contains a brief description of 3D, 2D and 0D perovskite nanostructures, and then focuses on the description of the 1D structure - perovskite nanorods, their possible crystal structures, stability, possible preparation methods, optical properties and use in various optoelectronic devices. The practical part discusses in detail the preparation of CsPbBr3 perovskite nanorods using colloidal synthesis based on ligand-assisted reprecipitation and chemical division at room temperature. Furthermore, the synthesized nanorods are analyzed for morphology and their absorption and photoluminescence spectra are measured with the aim of verifying the dependence of optical properties on the mentioned morphology.
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Design and development of a multifunctional compact device for correlative measurement of temperature-dependent photoluminescence spectra of perovskite CsPbBr3
Balabán, Martin ; Klok, Pavel (referee) ; Liška, Petr (advisor)
This work presents an experimental setup for measuring the temperature dependence of the photoluminescence response of CsPbBr3 perovskite nanocrystals. The work includes the design, fabrication, optimization and especially the implementation of the device to an existing spectrometer. Furthermore, this thesis deals with the characterization part, which involves sample preparation and actual measurements of temperature-dependent photoluminescence. The constructed device enables photoluminescence measurements with a temperature range of 50 °C to 60 °C. Furthermore, thanks to the implementation of the device in the design of a confocal microscope with a raster stage, it is possible to obtain a map of the photoluminescence response of CsPbBr3 nanocrystals at any temperature in the given range. Each photoluminescence spectrum was parameterized and a simplified linear model based on the exciton-phonon coupling principle was used to determine the temperature dependence of the photoluminescence line width. Finally, the measured data are compared with existing measurements and the advantages and limitations of our constructed device are evaluated.
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Optical characterization of advanced nanomaterials with a high lateral resolution
Liška, Petr ; Münz, Filip (referee) ; Dvořák, Petr (advisor)
Advanced nanomaterials show a significant improvement in certain physical or functional properties compared to conventional materials. Such advanced materials are, for example, lead halide perovskites (LHP). It is a group of hybrid organic-inorganic materials with a direct bandgap exhibiting unique optical properties. The high quantum efficiency of photoluminescence makes nanocrystals or thin films of LHP suitable candidates for the production of light-emitting diodes, solar cells and LCD displays. Their inexpensive and simple fabrication together with their unique optical properties makes LHP one of the most developed materials of the last decade. This diploma thesis aims to study the optical properties of CsPbBr3 perovskite nanocrystals using high lateral resolution methods. CsPbBr3 perovskite nanocrystals show intense anti-Stokes photoluminescence. These nanocrystals can emit light with a lower wavelength than that of the light that causes their photoluminescence. The nanocrystals are prepared in two different ways: by evaporation or by crystallization of the precursor in a solution of dimethylformamide. The morphology, photoluminescence properties and chemical composition of individual nanocrystals are studied. Each nanocrystal is studied individually and its size, shape, photoluminescence properties and chemical compounds are determined, which leads to a deeper understanding of the anti-Stokes photoluminescence of perovskite nanocrystals.
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Optical characterization of inorganic lead halide perovskites using ab-initio methods
Matula, Radovan ; Špaček, Ondřej (referee) ; Liška, Petr (advisor)
Tato práce se zabývá olovnato-halogenidovými perovskity (OHP), novou skupinou materiálů, jež našla své využití v oblastech jako například fotovoltaika a optoelektronika. Potenciál OHP leží v jejich elektronové struktuře a snadno laditelném zakázaném pásu, což má za následek jedinečné fyzikální a funkční vlastnosti. Ke studiu optických vlastností a elektronové struktury OHP využíváme teorie funkcionálu hustoty (DFT). DFT metoda je ab-initio metoda založená na principu minimalizace funkcionálu elektronové hustoty k nalezení základní energie daného systému. DFT metoda společně s hybridními funkcionály byla využita pro získání správné elektronové struktury a hodnoty zakázaného pásu pro krystal CsPbBr3. Teoreticky získaná data byla využita v modelu efektivní hmotnosti k porovnání s fotoluminiscenčními spektry jednotlivých CsPbBr3 nanokrystalů s cílem zjistit energiové hladiny excitonů v závislosti na velikosti a tvaru nanokrystalů.
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Optimization of Carbon atomic source for graphene layer growth by MBE method
Liška, Petr ; Bartošík, Miroslav (referee) ; Mach, Jindřich (advisor)
This bachelor’s thesis deals with the development and optimization of an atomic source of carbon atoms with the thermal energy (0.1÷1 eV). An atomic beam in the conditions of ultrahigh vacuum is considered to be a suitable source of superior graphene layers also due to the high purity of the method. The first part of this work describes graphene as a material and the method of molecular beam epitaxy. The second part is dedicated to the description of an assembly of the carbon source and its optimization which also concludes with experimental data obtained from measurement of the deposited carbon layers on various substrates (Cu, Ge, Al2O3, SiO2).
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