National Repository of Grey Literature 47 records found  previous11 - 20nextend  jump to record: Search took 0.00 seconds. 
Magnetic shape memory alloys - ab initio approach
Heczko, Martin ; Šesták, Petr (referee) ; Zelený, Martin (advisor)
This Bachelor’s thesis is focused on theoretical study of magnetic shape memory alloys based on Ni2MnGa using ab initio calculations of electronic structure within the projector augmented wave method. In particular, the effect of increasing concertation of manganese instead of gallium was studied on total-energy and magnetic moment profiles along the tetragonal deformation path between austenite phase with cubic L21 structure and phase of nonmodulated martensite. Further, the effect of manganese atoms distribution within the gallium sublattice was studied as well as changes of this distribution under applied tetragonal deformation. At last but not at least, the elastic constants for austenitic and martensitic structures of studied alloys were calculated. The results show that the non-modulated martensite stabilized with increasing concentration of manganese, because its total energy decreased. The energetic barrier between austenitic and martensitic structures also decreased, which means the metastable austenite will change to unstable.
Ab initio calculation of doping in Ni2MnGa alloy
Janovec, Jozef ; Černý, Miroslav (referee) ; Zelený, Martin (advisor)
Cieľom tejto práce je teoretické štúdium systému Ni-Mn-Ga, vykazujúceho efekt magnetickej tvarovej pamäti. Pri výpočtoch bola použitá metóda Exaktných Mufiin-Tin Orbitálov v kombinácii s aproximáciou koherentného potenciálu vrámci Korringa-Kohn-Rostoker formalizmu. Totálna energia bola spočítaná pomocou metódy úplnej nábojovej hustoty. Skúmaný bol vplyv dopovania zinkom alebo kadmiom na totálne energie pozdĺž tetragonálnej deformačnej dráhy a následne na teplotu martenzitickej premeny TM a Curieho teplotu TC. Taktiež boli skúmané nestechiometrické zliatiny prebytkom Mn na úkor Ga. Výsledky predikujú nárast TM po všetkých pozorovaných substitúciách v podmriežke Ga a pokles TM po substitúciách v podmriežke Mn. Curieho teplotu znižujú všetky študované substitúcie s výnimkou zmeny magnetického usporiadania v martensite nestechiometrickej zliatiny.
The impact of marketing strategies on film viewer’s decision
Kudrnová, Anna ; Hanzlík, Jan (advisor) ; Zelený, Martin (referee)
The aim of this bachelor theses is to find out the most effective film marketing tools. Is it a movie poster that affects the decisions of the young generation when choosing a movie? In the empirical part, the thesis will deal with the general possibilities of marketing tools applicable to the film industry. The practical part will be based on a questionnaire survey which will be based on an interview with a film marketing expert.
EU-SILC Indicators International Comparison
Trezzi, Bohdana ; Mazouch, Petr (advisor) ; Zelený, Martin (referee)
This thesis is focused on comparison of selected indicators within EU-SILC and project Europe 2020. Data for analysis were used from databases of Statistical Office of the European Union (Eurostat). Following selected indicators are analysed: employment rate, people at risk of poverty or social exclusion, life expectancy. Trend-cycle series are used for analysis of selected indicators and values predicted for the year 2020 which are then compared with project Europe 2020 goals for countries the Czech Republic and Germany and in this way setting of these goals validated.
Legislation, support and possibilities of development of photovoltaic power plants in the Czech Republic and Slovakia
Svitek, Dominik ; Kouba, Vojtěch (advisor) ; Zelený, Martin (referee)
The thesis compares the geographical, economic and legislative conditions of establishing a photovoltaic power plant in the Czech Republic and Slovakia. Describes history and predicts future development of renewable energy sources, especially photovoltaic power plants. On a practical example, a photovoltaic power plant built in Eastern Slovakia analyzes the economy of this plant and also describes its impact on landscape and locality development.
Market of Physical Media in the Field of Film and Music
Kratochvílová, Lucie ; Hanzlík, Jan (advisor) ; Zelený, Martin (referee)
The bachelor thesis is devided into two parts, a teoretical one and a practical one. One chapter of the teoretical part deals with the development of physical media in the field of film and music with an overlap to online distribution and the current state of the physical media market. Another chapter of the thesis is devoted to legislation in this field. The last chapter of the theoretical part is devoted to the influence of corporations on the market with physical media and marketing strategies. The main content of the practical part is quantitative research, which identifies patterns of behaviour in purchasing physical media today. The information obtained is interpreted in the form of graphs with the comprehensive description. The outcome of the research is a definition of a typical customer who, based on the answers I get, most often purchases physical media.
Short film and its distribution
Fojtíková, Anna ; Hanzlík, Jan (advisor) ; Zelený, Martin (referee)
Bachelor thesis Short film and its distribution explores the phenomenon of the short film and its possible spread. Thesis deals with the definition of short film and film distribution. By using the interviews will be held to analyze the possibilities of distribution of short films. Based on these interviews, the reader will be able to get a rough idea of how one can currently run film distribution of this type of film.
Culture Shock on the example of international students in Prague
Bezushchenko, Polina ; Dianová, Markéta (advisor) ; Zelený, Martin (referee)
This thesis covers the problem of culture shock that is nowadays becoming more and more popular, since our world is the world of both extensive and intensive integration and globalization. The aim of the work is to analyze how much international students in Prague are affected by culture shock. The first part of the thesis provides the deep information about the concept of culture shock. The second part of the work comprises the survey which was done by the mean of the questionnaire. The results are evaluated and presented in the particular chapter together with evaluations and inferences. The research shows that there are certain patterns of behavior that can be seen in particular cases regarding culture shock.
Ab initio calculations of the phase stability in Ni-Mn-Ga alloys
Pongrácz, Jakub ; Šesták, Petr (referee) ; Zelený, Martin (advisor)
This thesis deals with theoretical study of magnetic shape memory alloy based on Ni2MnGa with help of ab initio calculations of electronic structure within the projector augmented wave method. In particular the effect of Co- and Cu-doping is studied on total-energy profile along the tetragonal deformation path between austenite phase with cubic L21 structure and phase of nonmodulated martensite. Obtained results are used for estimation of doping influence on martensitic transformation temperature. Transformation temperature increases in the alloy doped by 3.125 at. % of copper instead of gallium whereas transformation temperature decreases in the alloy doped by 3.125 at. % of cobalt instead of nickel. If both type of doping are used the transformation temperature increases slightly because the effect of copper is stronger. Comparison of results from this work with available results obtained with help of the coherent potential approximation shows that a local lattice distortion around doping atom has negligible effect on studied properties.
Observation of twin boundaries in Ni-Mn-Ga alloys
Čech, Jan ; Jan, Vít (referee) ; Zelený, Martin (advisor)
This bachelor’s thesis is focused on observation of twin boundaries in a magnetic shape memory alloy based on Ni2MnGa with 10M martensitic structure. Theoretical part of the thesis describes materials with shape memory effect, their response on mechanical or magnetic loading, phenomenon of twinning, which is closely connected to the shape memory effect, and various levels of twinning. Experimental part studies different types of twin boundaries in monocrystal of alloy Ni49.2Mn30.4Ga20.4 using optical and electron microscopy. The thesis also deals with detection of structural orientations in different twin variants. A holder of samples was designed and constructed for real time observation of twin-boundary movement by optical microscopy. Deformation by pressure shows, that stress necessary for movement of Type II twin boundaries is ~0.2 MPa, whereas it is ~0.6 MPa for movement of Type I.

National Repository of Grey Literature : 47 records found   previous11 - 20nextend  jump to record:
See also: similar author names
1 Zelený, M.
1 Zelený, Marek
3 Zelený, Matěj
8 Zelený, Michal
5 Zelený, Miroslav
1 Zelený, Mnislav
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