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Measuring RLC on the components of electrical circuits
Pokorný, Marek ; Vítek, Ondřej (referee) ; Veselka, František (advisor)
Aim those work is inform numerator about possibilities and features gauging apparatus 7600 Precision LCR undergrounds and further then about metering paramers R,L,C on components electric standing ,especially then on sliding contacts,with which this work acquaint and how are their characteristics important for correct functionality electrical machine whereof are site rated power.Warp work largely start from manual to apparatus 7600 Precision LCR undergrounds and further then out publication sliding contact in electrical machine - doc. Veselka, doc. Chmelik.
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Fluorescence study of hydrophilic domains of associating colloids
Londinová, Monika ; Knotková,, Kateřina (referee) ; Pekař, Miloslav (advisor)
The properties of the hyaluronan were investigated by using different fluorescence probes, because hyaluronan is a hopeful carrier of an active matter in medicine and cosmetics. Selected fluorescence probes were: cationic acridine orange, Nile Blue A, methylene blue, amphiphilic 4-Di-2-ASP and anionic fluorescein. Except from fluorescence and absorption spectra of the probes were observed electrostatic and hydrophobic interactions as well. The probes in solvents with different polarity (MeOH, EtOH, DMSO) showed the bathochromic shift in the emission maximum and quenching of the fluorescence with the increasing polarity of the solvents. The influence of the ionic strength on fluorescence properties of the probe acridine orange and 4-Di-2-ASP was investigated in aqueous solutions of chlorides. The formation of acridine orange dimer is inhibited with increasing ionic strength. CaCl2 increased the ionic strength the most, then prevented repulsion of carboxylate groups, so it means the expansion of hyaluronan cluster into the solution. However, the emission of the probe 4-Di-2-ASP was quenched with the addition of CaCl2 the most. The first additions of COO– groups cause the formation of dimers of AO shown as decreasing in extinction coefficient and fluorescence intensity. Next addition of the hyaluronan caused a depolymerization of formed dimers and the increase of the emission intensity. The repolymerization caused the decrease and then again the increase. In case of 4-Di-2-ASP was the pattern of the fluorescence (the intensity and the position of the emission) firstly the same, but at the concentration of 1 g dm-3 the emission intensity increased. The probes MB and F were used for spectroscopic studies of the interaction between methylene blue-fluorescein complex and anionic and cationic surfactants. The absorbance of separate MB and F changed only with the addition of surfactants with the opposite electric charge. Absorbance of the mixture MB-F changed with the addition of the CTAC surfactant, while the addition of SDS into the mixture caused only the change of MB absorption spectra.
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New aspects of MIG/MAG welding
Minich, Marek ; Hála, Michal (referee) ; Kubíček, Jaroslav (advisor)
The thesis discusses the welding method MIG/MAG and the methods based on it. These methods are CMT and CMT Advanced which are currently still being improved. In the work are described their principles, benefits, uses and devices that allow welding by those methods. The thesis deals with the issue of a joint of steel and aluminum which is no longer an obstacle in welding due to CMT. This is a huge benefit especially for the automotive and aerospace industries, for which the solid and fast connection between steel and aluminum is a very desired matter. Further, there are welds of thin sheets described and discussed and also a list of wide range of practical uses for these welding methods.
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Aggregation Behaviour of Polysaccharides in Aqueous Solutions
Mravec, Filip ; Valko, Marián (referee) ; Hrdlovič, Pavol (referee) ; Valko, Marián (referee) ; Pekař, Miloslav (advisor)
Tato práce je zaměřena na agregační chování nativního a hydrofobně modifikovaného hyaluronanu, v různých molekulových hmotnostech a stupních substituce, ve vodném prostředí. Pro studium bylo vybráno šest fluorescenčních sond s různými vlastnostmi (Pyren; Nilská červeň; Perylen; Akridinová oranž; 6-(p-Toluidino)-2-nafthalenesulfonová kyselina; PRODAN). a výsledky získané pomocí těchto sond byly porovnány s jednoduchým anionaktivním tenzidem (Dodecylsíran sodný). U všech použité sond byly testovány jejich spektrální vlastnosti v závislosti na polaritě okolí a/nebo na koncentraci. Pro stanovení vlastností nepolárního jádra hyaluronového agregátu byly vybrány dvě sondy (Pyren, Nilská červeň). U domén byly sledovány polarita a viskozita vnitřního prostředí a jejich závislost na iontové síle a teplotě. Pro modifikované hyaluronany bylo stanoveno, že jejich kritická agregační koncentrace klesá s rostoucí molekulovou hmotností a stupněm substituce. Pro vlastní doménu platí, že její kompaktnost roste s rostoucí iontovou silou, ale klesá s rostoucí teplotou.
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Polarities in the Works of Oscar Wilde
Burianová, Petra ; Wallace, Clare (advisor) ; Beran, Zdeněk (referee)
Reading through the works of Oscar Wilde, one soon notices the many instances of polarity: the recurring themes of the body versus soul, good versus evil, city versus nature, artificial versus natural and many more. It is to be found in his plays as well as in his prose and fairy- tales. Yet these polarities do not necessarily have to oppose each other: the Wildean dialectic allows contraries to coexist, and thus we have the Star-Child who, through repentance, turns from evil to good; however this turn of character does not ensure a happy-ending, and makes us question whether "good really is good". A great number of Wilde's characters either live a double-life, have two distinct sides to their personality, or even several personalities, and in the case of Dorian Gray the split is literal. What led the author to constantly toy with this motif is a question worth examining. In Wilde's case, the artist's life cannot be entirely separated from his works since so much of what he was and what formed him is reflected in the texts he wrote. His statement that "what people call insincerity is simply a method by which we can multiply our personalities" (Ransome, 162) shows that for Wilde, truth was not the opposite of "lie", but there may have been several different versions of truth. His aesthetic views,...
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Explaining the Czech Foreign Policy Towards China (1992-2017)
Adamková, Petra ; Garlick, Jeremy Alan (advisor) ; Havlová, Radka (referee)
The presented master´s thesis aims to explain the Czech foreign policy towards China since 1992 to the year 2017. In order to analyse the approach, the author firstly carries out a literature review and introduces three levels of foreign policy analysis, i.e. system, (sub)state and individual. Key relevant phenomena are introduced and the stage is set for the case study. The empirical part of the presented thesis begins with a summary of the foreign policy of the Czech Republic towards the People´s Republic of China. To provide a complex picture, the Chinese interests in Czechia are described as well. The last chapter represents the analysis itself. The notion of polarity and great powers in the system level, the national attributes with domestic influences, and the personalities of two presidents provide the basic aspects contributing to the final explanation.
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Shifts in Polarity in the Post-war Global System - Attempted European Re-colonisation in Asia
Huntley, Matthew David ; Garlick, Jeremy Alan (advisor) ; Havlová, Radka (referee)
France and Britains failure in their attempt to re-colonise parts of South-East Asia after the Second World War came out of miscalculations made by their governments and their state institutions. The international system did not transition immediately after the war from multi-polarity to bipolarity. A window of opportunity was available for the two countries to regain influence in the region. The external political environment in the region was not unfavourable to a return of European colonial powers and there were no immediate viable challengers. Foreign policy misjudgements, weak domestic political systems and changes in priorities all contributed to the decline in influence of these two European colonial powers in South-East Asia. This thesis applies realist principles in combination with aspects of constructivism, while observing system and unit levels, to ascertain the root causes of the decline of British and French influence in the region.
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The Political Consequences of Early 21st Century Changes in the Global Balance of Power: Scenarios for the Future
Flechet, Thomas ; Garlick, Jeremy Alan (advisor) ; Havlová, Radka (referee)
This thesis had the purpose to study the current international system. After presenting its features in theories, the aim was to understand how it is constructed through an analytical approach. In this thesis, it is supposed that the international system, and in particular its polarity, is currently facing some changes due to several reasons which are exposed. It will be identified the different actors of the international system which are susceptible to upset the polarity of this system. Nation-states, IGOs and MNCs will thus be described and presented, and their strength into the completion of such achievement will be identified. To conclude, the thesis will end with a last chapter dedicated to the construction of future scenario which will aim at forecasting the potential international system in which one will be evolving in the coming future.
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Polarities in the Works of Oscar Wilde
Burianová, Petra ; Wallace, Clare (advisor) ; Beran, Zdeněk (referee)
Reading through the works of Oscar Wilde, one soon notices the many instances of polarity: the recurring themes of the body versus soul, good versus evil, city versus nature, artificial versus natural and many more. It is to be found in his plays as well as in his prose and fairy- tales. Yet these polarities do not necessarily have to oppose each other: the Wildean dialectic allows contraries to coexist, and thus we have the Star-Child who, through repentance, turns from evil to good; however this turn of character does not ensure a happy-ending, and makes us question whether "good really is good". A great number of Wilde's characters either live a double-life, have two distinct sides to their personality, or even several personalities, and in the case of Dorian Gray the split is literal. What led the author to constantly toy with this motif is a question worth examining. In Wilde's case, the artist's life cannot be entirely separated from his works since so much of what he was and what formed him is reflected in the texts he wrote. His statement that "what people call insincerity is simply a method by which we can multiply our personalities" (Ransome, 162) shows that for Wilde, truth was not the opposite of "lie", but there may have been several different versions of truth. His aesthetic views,...
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New aspects of MIG/MAG welding
Minich, Marek ; Hála, Michal (referee) ; Kubíček, Jaroslav (advisor)
The thesis discusses the welding method MIG/MAG and the methods based on it. These methods are CMT and CMT Advanced which are currently still being improved. In the work are described their principles, benefits, uses and devices that allow welding by those methods. The thesis deals with the issue of a joint of steel and aluminum which is no longer an obstacle in welding due to CMT. This is a huge benefit especially for the automotive and aerospace industries, for which the solid and fast connection between steel and aluminum is a very desired matter. Further, there are welds of thin sheets described and discussed and also a list of wide range of practical uses for these welding methods.
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