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Transmission Electron Microscopy of Al-Mg Aluminium Alloys with Addition of Sc and Zr
Křivská, Barbora ; Šlapáková, Michaela (advisor) ; Málek, Přemysl (referee)
Abstract. The microstructure and its evolution during isochronal annealing of a twin roll cast Al-3.2Mg-0.19Sc-0.14Zr (wt.%) alloy was investigated by light optical microscopy and electron microscopy. Two procedures - equal channel an- gular pressing and annealing at 300 řC for 8 h were applied to enhance mechanical properties of the alloy. The annealing led to the precipitation of a fine dispersion of Al3(Sc,Zr) particles providing an increase of ∼20 HV in the Vickers microhard- ness. Equal channel angular pressing refined significantly the microstructure and raised the microhardness by about 30 HV. Applying of the 300 řC / 8 h both before and after equal channel angular pressing did not induce further strength- ening. However, the precipitation of the Al3(Sc,Zr) phase had a stabilizing effect when the material was exposed to the subsequent isochronal annealing. 1
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Improving Investment Timing
Málek, Petr ; Novák, Jiří (advisor) ; Cingl, Lubomír (referee)
This masters thesis is based on study of technical analysis of financial markets, i.e. analysis of dependencies between past and present price data, especially when it comes to "supports" and "resistances" or historical price levels where price recently tended to stop and reverse. First of all, summary of the most relevant literature on technical analysis is presented, together with literature on psychology of investing, behavioral finance and market efficiency. Following that, theoretical arguments in favor of possible edge in trading of technical levels are introduced and possible objections are addressed. This theory - in the form of several thousands of unique but similar trading strategies - is then tested on historical data of the most important financial assets. Results are compared to those of conservative buy-and-hold strategy and random trading. We reached the conclusion that trading based on technical price levels brings positive capital gains which are better than those achieved by random trading and buy-and-hold strategy. Parameters of our strategies influence the results in expectable manner more often than not.
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Fictional Worlds Theories. An Analysis and Interpretation of the Recent Development of the Theories of Fictional Worlds.
Zima, Martin ; Bílek, Petr (advisor) ; Málek, Petr (referee)
The thesis analyzes the possibilities of application of the fictional worlds theory as a possible basis for a different literary-theoretical approach to the study of literary texts. Not being a mere literature research, the thesis inquires into issues which are necessarily connected with the fictional worlds theory and which have been so far rarely dealt with, if discussed at all. It contributes to the discussion on advantages and drawbacks of the mimetic approach and of the fiction theory, it analyzes the possible applicability of the fictional worlds theory in literary history, it attempts to determine the correlation between the Seymour Chatman's textual types and the fiction theory nomenclature, and last but not least the thesis deals with the possibilities of this theory in the fictional worlds of lyrical poetry. Powered by TCPDF (www.tcpdf.org)
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Advanced aluminium alloys prepared by powder metallurgy and spark plasma sintering
Molnárová, Orsolya ; Málek, Přemysl (advisor) ; Haušild, Petr (referee) ; Vojtěch, Dalibor (referee)
Mechanical properties of aluminium alloys highly depend on their phase composition and microstructure. High strength can be achieved among others by introduction of a high volume fraction of fine, homogeneously distributed second phase particles and by a refinement of the grain size. Powder metallurgy allows to prepare fine grained materials with increased solid solubility which are favourable precursors for further precipitation strengthening. Gas atomization was used for the preparation of powders of the commercial Al7075 alloy and its modification containing 1 wt% Zr. A part of gas atomized powders was mechanically milled at different conditions. Mechanical milling reduced the grain size down to the nano-size range and the corresponding microhardness exceeded the value of 300 HV. Powders were consolidated by the spark plasma sintering method to nearly fully dense compacts. Due to a short time and relatively low temperature of sintering the favourable microstructure can be preserved in the bulk material. The grain size of compacts prepared from milled powder was retained in the submicrocrystalline range and the microhardness close to 200 HV exceeded that of the specially heat treated ingot metallurgical counterparts. The prepared compacts retained their fine grained structure and high...
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The Motives of Reading, Writing and Interpretation in the stories of Karel Čapek
Bartošová, Jiřina ; Málek, Petr (advisor) ; Mravcová, Marie (referee)
The work "The Motives of Reading, Writing and Interpretation in the stories of Karel Čapek" is focused on interpretation of "Povídky z jedné kapsy" and "Povídky z druhé kapsy" where we can find such motifs. This analysis is preceded by chapters devoted to Karel Čapek's relation to trivial literature, especially detective story. The main part dealing with interpretation of concrete short novels is divided into chapters: Interpretation and motives of reading, Motive of interpretation, The power of newspapers and secret of letters, The accident and interpretation, Philosophy and pragmatism. Karel Čapek is also presented as original author of original Czech detective story with atypical signs; thanks to the principle of simplicity he attains a great success by the audiences. We learn how strong is the power of literature and that writing for everybody doesn't implicate a lower quality, but he is led by the interest for people and by the effort to connect a reader with a narrator. Key words: Interpretation, Motives, Reading, Writing, Reader, Author, Story
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The concept of creating figures in Richard Weiner's prose-fiction
Cesneková, Andrea ; Mravcová, Marie (advisor) ; Málek, Petr (referee)
The diploma thesis The Concept of Creating Figures in Richard Weiner's Prose-Fiction is focused on the characters of Weiner's early works. It analyses the characters on the basis of appropriate contemporary literary-theoretical approaches as well as it describes the specific way how the author intentionally worked with these constructs of narrative. The principal intention of this study is to show that the characters in his early prose fiction are mainly created in a specific manner which consists in presenting them as hypotheses. These hypothetical characters are achieved by using the principles of duplication, reducing, schematization and by the author's narrative strategy. Weiner's concept of creating his figures is close to expressionist style and represents the substantial part of his poetics.
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Escape from the chains of sense: towards the subversive force of the texts of F. M. Dostojevsky, F. Kafka and W. Gombrowicz
Jirsa, Tomáš ; Heczková, Libuše (advisor) ; Málek, Petr (referee)
My thesis "Escape from the Chains of Sense: Towards the Subversive Force of the Texts of F. M. Dostoevsky, F. Kafka and W. Gombrowicz" focuses on the phenomenon here called the f1ight of sense. This notion challenges interpretation as a desire for order and for synthesis of the work's semantic direction, and caUs for a different reading of the work. In the introduction, using Adorno's, Deleuze's and Guattari' s concepts, I try to show that the f1ight of sense is not a final state (being without sense) but the act of its f1eeing. Inf1uenced by Barthes and his concept of the pleasure ofthe text, I call the spaces ofthe subversive force, which lets the sense and its reconstruction slip away, ruptures. They lead to a "creative rnisunderstanding" which is a ground for experirnentation. This experimentation does not refuse interpretation and its hermeneutic claim on clear understanding but suggests a different approach: a reading that looks through these ruptures and lets itself get seduced by the gestures and ornaments, which defer or dissolve meaning in the text s of Do sto evsky, Kafka and Gombrowicz. Thus experimentation is an attempt to describe how these elements work together.
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Rudiš as a follower of Hrabal? "Skaz" in literary work of Jaroslav Rudiš
Rizikyová, Markéta ; Málek, Petr (advisor) ; Králíková, Andrea (referee)
The diploma thesis focuses on the ‚skaz' narrative on the example of the literary work of Bohumil Hrabal and Jaroslav Rudiš. The theoretical definition and main features of this narrative strategy are based on the works of Boris Ejchenbaum, Viktor Vinogradov, Wolf Schmid, and Miroslav Drozda. The thesis also introduces a Czech variant of ‚skaz' in the form of a ‚pub story', defined by Emanuel Frynta and Václav Černý. The following analytical chapters are devoted to ‚skaz' in the literary work of Bohumil Hrabal and Jaroslav Rudiš. Finally, the characteristics of ‚skaz' in the work of both authors are compared.
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