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Dielectric Relaxation Spectroscopy of Composite Systems
Holcman, Vladimír ; Liedermann, Karel (advisor)
The subject of this doctoral thesis is the study of dielectric properties of a binary composite made up of a polymer matrix and metallic filler. Properties of such composites have been extensively examined in the past and they turned out to depend on temperature, frequency and in particular on filler concentration. The objective of this work was first to experimentally establish and second to describe quantitatively the effect of the size of metallic particles on the properties of the composite concerned, yet at the same filler concentration. This study was carried out on the model system ethylene-vinylacetate copolymer – nickel. The acquisition of experimental results required extensive measurements in a wide frequency and temperature interval, as well as a manufacture and preparation of a large set of samples with different concentrations and Ni filler sizes. Measurements were in part carried out at the Centre for Electronic Correlations and Magnetism, Institute of Experimental Physics V of the University of Augsburg (Germany) and, after the installation of a new cryogenic system, at the Department of Physics at FEEC, BUT Brno. Measurements were performed on a number of meters (Alpha-Analyzer of Novocontrol, HP4284A and HP4285A of Hewlett Packard and E4991A of Agilent) in the frequency range 1 Hz – 1 MHz and in the temperature interval 10 K – 300 K. The nickel concentration in systems studied varied from 0 % to 75 % and nickel particles were of a spherical shape with diameters between 35 and 115 m. The measurement results have shown that in the above frequency and temperature window just a single relaxation and a single conductivity mechanism occur. It was also proved that the frequency dependence of complex permittivity is for different Ni particle sizes at the same concentration different. These results have been quantified and a simple mathematical formula based on the Lichtenecker mixture rule has been proposed for their description. The physical origin of the effect of particle size at the same total nickel concentration is sought in different surface areas of internal interfaces between nickel and polymer in the composite
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The segragation of mixtures to pavement
Trávníček, Dušan ; Hýzl, Petr (referee) ; Stehlík, Dušan (advisor)
The work deals with the examination of repression and segregation in asphalt mixtures. The theoretical part is monitoring the current situation about the problem of segregation, which mainly refers to the practical adjustments during laying „risking“ asphalt mixtures on the formation of segregated places in the shelter layers of roads. The practical parts of the thesis are summarised measurements on six samples of the most commonly used asphalt mixtures to determine the segregation depending on the selected parameters. The work is describing and valorising a test for determining segregation according to ČSN EN 12697-15.
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Politicizing Sexualities: Mobilization practices and networking within the LGBTQ movement in contemporary Madrid
Wiesnerová, Vendula ; Ezzeddine, Petra (advisor) ; Kolářová, Kateřina (referee)
This ethnographic study intends to explain the recent mobilization practices within the LGBTQ movement in contemporary Madrid in reference to the strategic use of identity and networking in collective action. It describes the Spanish movement as an ideologically polarized heterogeneous aggregate. The active challenging groups criticize the dominant part of the movement for giving up its original message of sexual liberation and diluting it in consumerism by supporting capitalist tendencies and the power of leading political parties. Via launching protest campaigns and collaborating in internationally supported networks with other ideologically related social movement communities, the challenging groups demand civil rights for all people, regardless of their sexual orientation or identity. They mobilize upon the collective identity of "precariousness" while integrating elements of queer and transgender theory into their radical leftist oriented politics in order to transform the Spanish society. By bringing on new critical ideas and adherents, the success of the leftist oriented challenging groups has an impact on the direction of the politics of the dominant group, which thereby is forced to adopt such ideas into their politics. Despite the disunity and antagonistic character of the movement, the...
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Euroscepticism and Fragmentation in the British Conservative Party 2015-2017
Svobodová, Markéta ; Kasáková, Zuzana (advisor) ; Kłusek, Johana (referee)
The main goal of a bachelor thesis called Euroscepticism and Fragmentation in the British Conservative Party 2015-2017 is to analyse fragmentation in Conservative Party caused by different opinions on how to deal with the European question on four main events that occurred in those years. It also attempts to answer whether and how the party Euroscepticism has changed. The events used for the analysis are the general election in 2015, the referendum concerning the British membership in European Union in 2016, the intra party election in the same year and the general election in 2017. Thesis includes theoretical part, which covers several typologies concerning factions and Euroscepticism. Based on the theoretical part were laid out three research criteria. The first criterion examines the external manifestations of Euroscepticism on party manifestos on which are compared statements concerning the European Union. The next chapter criterion examines the internal manifestations of party Euroscepticism and fragmentation. They are analysed based on the behaviour of factions and politicians between 2015 and 2017. The last criterion maps the manifestations of Euroscepticism and fragmentation on the intra party election of a new party leader. Before each analysis comes a description of examined subjects....
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Eurosceptic Political Parties Faction in the European Parliament: constitution, form, political activity and changes in the context of the European Parliament elections 2019
Doležal, Tomáš ; Brunclík, Miloš (advisor) ; Perottino, Michel (referee)
The thesis deals in the theoretical part with a presentation and comparison of views of political science on party-political euroscepticism, including a description of the development of the form of eurosceptic factions in the European Parliament after 2014 and political subjects associated in them. Practical part presents, analyzes and interprets the voting of these political entities in the election periods 2014-2019 and 2019-2024, especially in terms of their coherence within individual factions. Both in general (overall average coherence) and by individual thematic agendas. In its outputs, the work tries, based on the obtained data, to answer the question, what are the dominant common ideological characteristics of the eurosceptic political parties represented in the European Parliament and whether they form, or can form, a separate so-called party-political family. Keywords: Euroscepticism, European Union, European Parliament, factions, political parties, populism, elections Title: Eurosceptic Political Parties Factions in the European Parliament: constitution, form, political activity and changes in the context of the European Parliament elections 2019
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