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The mythologist of the early and high German romanticism. The concept of the myth in the beginning of the 19th Century
Nedbalová, Julia ; Starý, Jiří (advisor) ; Zbytovský, Štěpán (referee)
The thesis presents the mythological studies of the German Romantics. The research focuses on the four important mythologists - Johann Gottfried Herder, Friedrich Creuzer, Karl Otfried Müller and Friedrich Wilhelm Joseph von Schelling. The analysis of their work leads to their specific concept of the myth. The early enlightenment tendencies, which rejected the myths as stories about gods of the undeveloped men were replaced with the conception of the romantics. They disclosed the symbolic character of the myths and explained the origin and nationalization of the myth on the basis of the symbol theory. At the same time they award truth to the mythological process which the man necessarily goes through. The creation of God in the mind of man is clarified with the philosophy of mythology. This way the romantics contribute to the development of the mythology towards a critical historical science.
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Complete Boolean Algebras and Extremally Disconnected Compact Spaces
Starý, Jan ; Simon, Petr (advisor) ; Bukovský, Lev (referee) ; Thümmel, Egbert (referee)
We study the existence of special points in extremally disconnected compact topological spaces that witness their nonhomogeneity. Via Stone duality, we are looking for ultrafilters on complete Boolean algebras with special combinatorial properties. We introduce the notion of a coherent ultrafilter (coherent P-point, coherently selective). We show that generic existence of such ultrafilters on every complete ccc Boolean algebra of weight not exceeding the continuum is consistent with set theory, and that they witness the nonhomogeneity of the corresponding Stone spaces. We study the properties of the order-sequential property on σ-complete Boolean algebras and its relation to measure-theoretic properties. We ask whether the order-sequential topology can be compact in a nontrivial case, and partially answer the question in a special case of the Suslin algebra associated with a Suslin tree.
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Seiðr
Šebetovská, Michaela ; Chlup, Radek (advisor) ; Starý, Jiří (referee)
SEIÐR Michaela Šebetovská AAAABSTRACTBSTRACTBSTRACTBSTRACT The thesis is about an Old-Norse practice called seiðr, which was performed as a prophetic and magical ritual, according to some authors similarly to shamanic ones. The emphasis is put on information obtained from the Old-Norse textual sources. Despite their fragmentary nature, the aim of this work is to make a well-arranged summary of the facts provided by these primary sources. The main subjects are the beings performing seiðr, their characteristics, place in society, equipment and conditions required for the ritual and its goal. This information is then used for interpretation and a detailed analysis of several aspects of seiðr.
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Initiation of the Germanic Hero in Fornaldarsõgur
Fryje, Jakub ; Starý, Jiří (advisor) ; Antalík, Dalibor (referee)
The main theme of this paper is the initiation of the heroes from two important fornaldarsõgur: The Saga of the Võlsungs and The Saga of the King Hrólf Kraki. These heroes are called Sigurð, Sigmund, Sinfjõtli and Hõtt. The tales of these four characters acting in the stories that are preserved in the sagas we divide into three phases, which can be designated like separation phase, liminal phase and a return. In this case we are inspired by the conception of Arnold van Gennep, who dividided the rites of passage in this manner. The liminal phase of the heroic story is most important for us. It is the core of the initiation process, which is experiencing the hero, and the core of the rite of passage as well. In our stories is significant for the liminal phase for example a monster killed by the hero, hero's encounter with a numinous beings, or hero's abidance in certain liminal state. The main objective of this thesis is using primary sources and secondary literature by scholars such as Otto Höfler, Victor Turner or Jens Peter Schjødt, to create consise analysis of the liminal phase of three stories about germanic heroes, which is possible to designate as the initiation texts. This analysis should clarify, how these initiation texts relate with the initiation rituals and - in certain cases - with the...
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Wetting and Spreading of Solder on PCB Surface
Wiesner, Lukáš ; Špinka, Jiří (referee) ; Starý, Jiří (advisor)
This work deals with the metal surface wetting problems of molten lead-free solder and monitoring of ongoing processes at the inter-phase interface. This work also deals with flushing monitoring of spreading velocity on solder finishes Ni/Au and Immersion Sn deposited on copper plated base material FR4 using digital cameras. Measurement is performed at the improved workplace. After the reflow process is measured by length of spreading solder. It evaluates and compares the time dependence of velocity of spreading solder for Ni/Au and Immersion Sn finishes.
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Influence of Bottom Preheating in Rework of Assembled PCB
Čechák, Ondřej ; Bžoněk, Tomáš (referee) ; Starý, Jiří (advisor)
This bachelor's thesis introduces the problematics of physical mechanisms of heat transfer and the correlative mathematical formulas and the use of mentioned problematics in the technology of bottom preheating in the rework of assembled printed circuit boards. It explains the importance and reasons of use of this technology, not merely in the professional production. It focuses on expert analysis of the appliances based on their properties and clarifies the differences in basic types of the devices. The emphasis is then laid on a practical testing of the technical parameters of the preheating devices as well as on an experimental design and a practical testing of a local bottom printed circuit board preheater.
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Wave Soldering Fluxes Comparison
Stoklásek, Lukáš ; Martinec, Petr (referee) ; Starý, Jiří (advisor)
Semestral thesis introduces the problematics of wave soldering fluxes, flux residues and problems of electromigration. Practical part describes measuring of ionic contamination by using conductometric method, measuring the wettability by the wetting balance method and amount of failures on wave soldered printed circuit boards with these fluxes. The main object is to compare quality of the fluxes.
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Wettability of PCB Surface Finishes and Comparison of Methods
Vídeňský, Ondřej ; Přikryl, Tomáš (referee) ; Starý, Jiří (advisor)
This bachelor´s thesis deals with testing methods for surface finishe´s wettability PCB. For this tests has been designed and created testing board which contains testing coupons for testing methods. Boards have been created and covered by surface finishes by Gatema Boskovice. In this thesis electroless nickel with immersion gold (ENIG) and immersion tin have been tested. For simulation of reflow soldering have been used test methods solder indicator, solder spread test and dewetting test. Wetting balance test method has been used as simulation of wave soldering.
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PCB s Cleaning from Prototypes to Low Series Production
Švéda, Miloš ; Zatloukal, Miroslav (referee) ; Starý, Jiří (advisor)
This bachelor thesis deals with the construction of the cleaning unit for prototype and low series production PCB cleaning. It describes the methods used for PCB cleaning, mainly for removing flux residues. It briefly describes the test methods for measuring contamination. It deals with the selection of individual components for cleaning equipment construction and compatible chemistry for flux residues cleaning.
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Solder Joint Quality based on Heating Factor
Kučírek, Martin ; Špinka, Jiří (referee) ; Starý, Jiří (advisor)
Master’s thesis in the theoretical part analyses the heating factor (Q), which has significant share on quality of a solder joint. The practical part describes the design and production of test PCB and setting temperature profiles, SMD resistors soldering by using BiSn solder paste. Shear tests of SMD solder joints were realised and evaluated including isothermal ageing samples. At the end of master’s thesis solder joints visual aspects and defects were evaluated, measurement thickness of intermetallic compound by not only optical microscope but also SEM, discussion about results and Q was evaluated.
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