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Manual Soldering Station - Evaluation of Selected Parameters
Němec, Ivo ; Špinka, Jiří (referee) ; Starý, Jiří (advisor)
This semestral work deals with the investigation of different principles of heating elements control in soldering stations and the influence of lead-free solder alloy on the life of soldering tips. The thesis summarizes the description of the sub-elements of the soldering stations and explains their functions. The defects of the soldering tips due to the use of lead-free solder alloys are also described. Last but not least, European directives governing the use of lead-free solder alloys in electronic and electrical products are mentioned.
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The Machine in the early works of Ernst Jünger
Miller, Václav ; Starý, Jiří (advisor) ; Petříček, Miroslav (referee)
This thesis deals with the concept of the machine in the works of the German writer Ernst Jünger (1895-1998). It analyses the author's opinions about the machine and technology expressed in his essays, as well as the way how Ernst Jünger depicts the machine in his war memoirs. Due to the considerable amount of the author's publications, only his early work is taken into consideration. This creative period begins 1918 with Jüngers return from the front-line service and ends, from the specific perspective of the chosen subject, 1932 with the publication of the essay The Worker. The mentioned essay represents together with a shorter paper titled Total Mobilization (1930) a separate chapter in the author's understanding of technology and is therefore given adequate space in the present thesis. The writer's concepts of machine and technology, which have been published prior to the Worker, are largely observed in the light of this later development of his ideas. In the final chapter it is attempted to show how the structure of the author's front-line experience is reflected in some of his ideas concerning the problem of modern technology.
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Fast Goes the Fleeting Time: The Miscellaneous Concepts of Time in Different Old Norse Genres and their Causes
Králová, Kristýna ; Starý, Jiří (advisor) ; Simek, Rudolf (referee) ; O'Donoghue, Heather (referee)
The thesis is concerned with time reckoning and time perception in Old Norse culture. Based on the analysis of various prosaic and poetic works or genres I show what the domestic pre- Christian images of time most probably looked like. I also investigate in what respects the original images of time have changed depending on social development, namely as regards the arrival of Christianity and feudalism to the North. Old Norse images of time are reconstructed by analysing the temporal structure of primary sources. I examine the systems of dating and time indications used in the texts, as well as the properties of narrative time. The last mentioned is achieved based on the categories of order, duration and frequency defined by Gérard Genette. The primary sources are divided into three groups in the thesis. The first group is comprised of works that include traces of the pre-Christian understanding of time. Besides Poetic Edda and Snorri's Edda, I have also included the so-called legendary and family sagas in this group. The second group is comprised of different types of texts, all of which adopt foreign ways of time reckoning that spread to Iceland especially through the influence of the Church and through various learned treatises. Besides the Old Norse computistical treatise known as Rím I, which...
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Mathematical modelling and computational methods in applied sciences and engineering - Modelling 2019
Blaheta, Radim ; Starý, Jiří ; Sysala, Stanislav
Modelling 2019 is an international conference on Mathematical Modelling and Computational Methods in Applied Sciences and Engineering held in\nOlomouc, Czech Republic, in September 16 - 20, 2019. It aims to be a forum for an exchange of ideas, insights and experiences in different areas\nof mathematical modelling. It includes the fundamental formulation and analysis of mathematical models, the development of numerical methods and exploitation of capabilities of the contemporary high-performance computers or applications of mathematical modelling.\nThis conference belongs to a series of conferences previously held in Roznov in 2014 and 2009, in Pilsen in 2005 and 2001, and in Prague in 1998 and 1994. During the period of 25 years, the focus of the conference has been substantially enlarged. Besides the topics aiming at the development\nof numerical methods and analysis of mathematical models described by the partial differential equations, the conference relates to the inverse\nproblems, quantification of uncertainties in the input data, machine learning and exploitation of high-performance computing systems of petaflops and pre-exaflops performance. Increased attention is devoted to challenging industrial problems and collaboration with industry.
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Scandinavian elements in the language of Old East Slavic legal codes
Štěříková, Hana ; Lemeškin, Ilja (advisor) ; Blažek, Václav (referee) ; Starý, Jiří (referee)
The doctoral thesis Scandinavian elements in the language of Old East Slavic legal codes consists of three main parts. The first of them puts the topic in connection with previous research and assorts it both according to chronology and ideologic influences, that have had a grave impact on scientific publications concerning the disputes over Varangians and the beginning of East-Slavic history. The lack of scientific objectivity shows not only in historical studies, but also in philological works, since linguistics played only a helping role in order to deliver proofs in favour of preferred theories. The second part of the thesis researches historiographic works of Swedish diplomat Petrus Petreius (early 17th century) and thus contributes to the polemic about who was the first normanist. The analysis shows that Petreius was a skillful compiler, but is not to be considered the first normanist. His works don't include any ideological links between Swedish politics towards Russia and Gothicism either. The third part of the thesis examines history and semantics of three Old East Slavic terms ябедник (yabednik), тиун (tiun) аnd гридь (gridʼ) and their derivatives. The author describes their occurence in historical sources and development in both morphology and semantics up to the present day and makes...
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Selective Soldering
Stoklásek, Lukáš ; Petr, Martinec (referee) ; Starý, Jiří (advisor)
This diploma thesis introduces the problematics of selective soldering. The theoretical part deals with description of soldering process and its possibilitites, use of this processes for selective soldering and the control of production. The practical part describes the methodics of measuring the amount and uniformity of flux applied on printed circuit boards, effects and stability of preheaters and dwell time if PCB in the soldering wave. The next part deals with the production test for the certain product, cleanness of the single processes, x-ray diagnostics and cross section of the boards. In the end is economic evaluation of the processes. The main object of this thesis is to suggest the optimal production process for the product.
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Bismuth Low Temperature Solder Pastes
Švéda, Miloš ; Zatloukal, Miroslav (referee) ; Starý, Jiří (advisor)
This master´s thesis deals with bismuth low temperature solder pastes. Describes the properties of bismuth solder pastes. It shows the process of manufacturing a printed circuit board for test. The thesis also characterizes laboratory temperature profile setting for the BiSn soldering pastes. Solder paste printing and placement 0 ohm rezistors to printed circuit boards with different surface finishes in the manufacturing plant. Setting of solder profiles for low soldering pastes in reflow oven. Testing resistence of mounted zero resistor on the test board at different aging temperature were analysed. Resistance measurement after a specified time. Testing of solder joint strenght of printed circuit boards for different surface treatments. Changes in structure wereanalysed on microsections for solder pastes.
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Test Equipment for Solder Joint Strength Measuring
Čechák, Ondřej ; Špinka, Jiří (referee) ; Starý, Jiří (advisor)
This master thesis introduces the problematics of the tensile strength of soldered joints and the correlative mathematical formulas and the use of mentioned problematics in the technology of die shear/pull machines designed for the solder joint tensile strength measurement. It explains the importance and reasons for the use of this technology. The emphasis is then laid on the design and construction innovations of the current laboratory manual shear/pull measuring machine, its semi-automation and the possibility of utilizing the innovated system in a laboratory class of a subject on FEEC BUT.
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X-ray Defectoscopy
Velím, Michael ; Ondřej, Šimeček (referee) ; Starý, Jiří (advisor)
This diploma thesis deals with a defect detection with X-rays in the manufacturing procedure in the electrotechnical field. The work summarises the knowledge about technical possibilities of an X-ray device Cougar of YXlon company. Part of the work is focusing on scanning in 2D, 3D visualization and automatic analysis. The thesis describes inspection methods of a connector connection, the quality of a soldered joint and an encapsulated product.
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Analyse and Optimise Production Process of Prototypes
Hamr, Tomáš ; Zatloukal, Miroslav (referee) ; Starý, Jiří (advisor)
This diploma thesis summarizes basic findings about issues of making development samples of PCB. The emphasis is especially on required quality which complies with mentioned norms. The theoretical section includes methodology for evaluating quality dismounted boards, assembling and soldering, parameters of components under different environmental circumstances. The practical part is carried out in cooperation with the department EEG in R&D Automotive Lighting Jihlava. It is dedicated to the design and the preparation of development samples where the quality is assessed according to given methodology from the theoretical part. PCB are analyzed by an X-ray, metallographic grinding and other methods. Recommendations are given and based on results for improvements.
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