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Homosexuality in primates
Falladová, Josefína ; Havlíček, Jan (advisor) ; Kuběnová, Barbora (referee)
Homosexual interactions were documented in more than 50 primate species, including humans. Homosexual behaviour is defined as either genital contact, genital manipulation or combination of both between same-sex individuals. The aim of this thesis is to systematically summarize the past knowledge of homosexual behavior in primates and critically analyze its possible functions. Homosexual behaviour varies in frequency, context and form in which this behaviour occurs, both between species, between males and females and during ontogenesis. I summarise not only studies looking recording homosexual behaviour in different primate species, but also regarding its form and the circumstances under which such behaviour occurs. Furthermore, in this thesis I introduce several sociosexual functions explaining homosexual behaviour, which are described most frequently: 1) dominance assertion, 2) tension regulation, 3) reconciliation, 4) alliance formation and social-bonding and 5) training for heterosexual mating. Sexual/hedonic aspects of this behaviour also form significant part of homosexual interactions. Possible functions of homosexual behaviour do not clearly point to a single explanation, homosexual behaviour could be multifunctional similarly to humans. Keywords: homosexual behaviour, homosexuality,...
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Modification of PCB cleaning process after removing BGA component
Procházka, Adam ; Bžoněk, Tomáš (referee) ; Řezníček, Michal (advisor)
This bachelor thesis deals with the modification of DPS cleaning process after the removal of BGA components. The thesis is divided into five main parts including the introduction and conclusion. The introduction comprises an assignment and aim of the thesis. The first, theoretical, part then deals with different kinds of soldering, individual types of solders and the rework process itself. The second part examines the whole practical part in detail, from the proposal of the test printed circuit board to its mounting, soldering and subsequent testing. Also, it explains the practical tests for connectors. The third part then describes the board testing by thermal cycling. The last part consists of the summary of results, a comparison of individual soldering pastes and conclusion.
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Turbocharger Rotors Using Gas Bearings
Sembol, Tomáš ; Dlugoš, Jozef (referee) ; Novotný, Pavel (advisor)
This bachelor's thesis is a research project focused on turbocharger rotors using gas bearings. The work is devided into seven chapters. The first chapter is brief summary of history of development of turbochargers for combustion engines. Basic working principles of turbocharger are descriped in second chapter. Third chapter is about the construction of individual parts, as well as about the turbocharger as a whole. The fourth part is devoted to the design, technical solutions and applications of aerodynamic bearings. The fifth and sixth chapter explains some of computational and experimental method. The final chapter lists required structural modifications of existing turbochargers.
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Technological stage of realization mounting frame of factory building
Jekielek, Marek ; Ing.Lukáš Kopecký (referee) ; Diaz, Yvetta (advisor)
The objective of this thesis is the technological project of the construction phase of mounting prefabricated frame. Includes technological standard for mounting frame, the project construction site for the phase of mounting , the schedule of the phase of mounting frame, financial plan of the phase of mounting frame, controlling plan and test plan of the phase of mounting frame, the plan of risks at the phase of mounting frame, and mechanical assemblies plan.
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Classification of asynchronous motors
Čala, Václav ; Dušek, Jiří (referee) ; Singule, Vladislav (advisor)
This diploma thesis deals with a creation of a “Classification Document” of asynchronous motors with a short-circuit armature with axial heights of 355, 400, 450, 500, and 560 mm. Furthermore, it is concerned with a creation of an integral design documentation for the production and assembly of these motors at the company TES VSETÍN, s.r.o. By writing this diploma thesis I would like to achieve a simplification of communication with the customers during the processing of asynchronous motors orders and to speed up the processing of asynchronous motors orders not only in the design department but also the complete technologic preparation of the production which will surely be provided by this integrated documentation.
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Assemblying effect on cable lines quality
Dočkal, Martin ; Křepelka, Václav (referee) ; Filka, Miloslav (advisor)
In the first part is explained what actually a structured cabling is. Its beginning, from what and why it was created. Its history when at the beginning were applied unbalanced coaxial cables, those were later replaced by balanced cables. In cabling for TVs are still used coaxial cables. Balanced cables are according to type named UTP, STP, FTP, and so on. Whit growing popularity of this type of cabling and its wide spread application was necessary to set some rules, standards, specifications and demands, how to build up the cabling from project to realization. According to these rules is the system built so there are strict rules for length of subsystems and interfaces and the whole appearance of the structure cabling. Next important point is projecting of cabling that is related to the previous points and when it’s finished, we should strictly follow it. With the project is closely connected characteristic of this cabling as attenuations, cross-talks and other transmission parameters which are measured in the practical part. In the second part is spoken about all the parts of which the structured cabling consists - metallic and optical connecting elements and cables. There are also mentioned their mechanical, electrical and transmission features. In the third part is described influence of man on the quality of structured cabling and the most common causes of lower quality and the ways how to prevent this from happening and how to manipulate with cabling not to destroy it. The final (fourth) part considers the measurement. There are measured qualities of metallic wires as the attenuations, delay, cross-talks on the near- and far-end, impedance and resistance. To all the features are mentioned schemes of the measurement on the twisted pairs. The measurement is divided into two parts. In the first part are measured five types of balanced cables of different length, category and damage influencing quality of these cables. In the second part is measured one balanced cable if it’s corresponding with category 5 for that t was made and if it would be possible to use it also for higher category 6. Values are tabularly sorted in tables.
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The role of lubricants in sheet metal forming
Čvanda, Petr ; Novotný, Karel (referee) ; Peterková, Eva (advisor)
This project which was elaborated in the bachelor education present summary of lubricants in technology of forming. Annotation was based on belles-lettres of problematic of these lubricants in technology of forming and include individual sorts of lubricants and their applications in variety of forming operations
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