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Laser welding of plastics
Nováková, Eliška ; Mrňa, Libor (referee) ; Kubíček, Jaroslav (advisor)
The bachelor presents a brief characteristics of thermoplastics welding methods followed by a more detailed description of laser welding of thermoplastics, i.e. laser description, division and types. Then, conditions and parameters of welding are defined. The experimental part is focused namely on visual welding tests on a test sample. The sample consists of two types of material – pure polymethyl methacrylate and black polycarbonate – which are used in car headlamp production. For welding, a diode laser designed for thermoplastics welding was used. The main target of inspection were flaws that were visible on macroscopically enlarged images. The tested welds mostly showed porosity and air bubbles. Finally, an evaluation of the experiment is conducted.
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Analysis of Customer Services in TAMTAM BAR
Vrabcová, Kateřina ; Nováková, Eliška (referee) ; Chalupský, Vladimír (advisor)
This bachelor's thesis deals with an analysis of customer services provided by TAMTAM BAR restaurant in Kromeriz. In the theoretical part mainly the issues of marketing research and customer satisfactory are processed. The analytical part is focused on the introduction of the company itself, followed by the evaluation and the analysis of customer satisfaction. As the result this in turn leads to proposal of measures for quality level increase of analyzed services.
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Influence of technological process of powder painting on the quality of silver-plated components in gas insulated substation - GIS
Nováková, Eliška ; Prosecký, Vít (referee) ; Kubíček, Jaroslav (advisor)
The thesis deals with the topic of silver coating on the inner surface of the tubes made of aluminum alloy EN AW-6101B. The high affinity of the aluminum for the oxygen, the heterogeneity of the surface and the presence of the hydrogen in the base material, are the properties which hinder the formation of metallic coating on the surface of the aluminum alloy. The saturation of the base material with the hydrogen, e.g. due to the pretreatment of the surface or by the process of creating of coatings, may under certain conditions cause the defects of the silver coating in the form of the bubbles (blisters). Other factors that may affect the quality of the silver coating are the way of creating of the interlayer and the conditions for the electrolytic deposition of the silver.
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Development of a Small Family Business
Nováková, Eliška ; Konečný, Štěpán (referee) ; Koráb, Vojtěch (advisor)
The bachelor thesis deals with the development of a small family business. The theoretical part contains business papers. This is followed by an analytical section describing in detail both the internal and external environment of a specific business. Its‘ position is determined, based on the strategic analysis, then things are designed to help increase the company revenue. The last part includes several suggestions, that should result in the higher sales.
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Machining of Hardened Steel on CNC Machines
Nováková, Eliška ; Prokop, Jaroslav (referee) ; Kalivoda, Milan (advisor)
The bachelor thesis deals with the topic of machining of hardened steels on CNC machines. In the first part there is the description of the company, in which the particular hardened part was machined. The next part of the thesis focuses on properties of hardened steel and their suitability for machining. The middle part of the work states the basic machining technologies used in the company and programming of the CNC machines. Further there are described the materials of the cutting tools for machining of the steel from selected producers/manufacturers. At the end of this thesis the machining of the particular hardened component is described, and the evaluation of the technology procedure is made.
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The Efficiency of Machines Evaluation for Production Task Ensuring
Nováková, Eliška ; Průša, Michal (referee) ; Jurová, Marie (advisor)
The diploma thesis deals with evaluation of obtained data from selected production equipment. The theoretical part is focused on production management, description of information production systems and defining methods for evaluation of machine efficiency. The practical part describes the current situation of selected productive sections and outputs from two compared systems. Next step is the calculation of OEE indicators, evaluation of individual workplaces and suggestions for improvement.
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Generation of volatile zinc chelates from aqueous matrix
Kračmarová, Aneta ; Nováková, Eliška (advisor) ; Červený, Václav (referee)
The topic of this work was optimization of the conditions for the generation of volatile zinc chelates. The aim was to develop an alternative method for generating volatile Zn speciates to its reduction by sodium tetrahydridoborate. Detection was carried out by atomic absorption spectrometry. Optimization of the conditions of the chelation reaction itself included the selection of a suitable chelating agent and appropriate modifiers, pH adjustment, suitable reagent and carrier gas flow rates, and appropriate apparatus arrangement. The following method characteristics were obtained under optimal conditions: LOD 1.55 mg L-1 , LOQ 5.17 mg L-1 and sensitivity 0.245 s L mg-1 . The repeatability was 13,7 %. The addition of modifiers was then tested to increase the efficiency of generation of volatile zinc chelates. Potential modifiers included transition metals, organic solvents, heterocyclic organic compounds, compounds from the carbamate group and surfactants. The heterocyclic 1,10-phenanthroline and the carbamate NaPDC were included in the optimal conditions because without them it was not possible to distinguish the signal from noise. Acetonitrile proved to be the most effective modifier, increasing the efficiency to 1547 %. With the addition of acetonitrile, the LOD decreased to 0.191 mg L-1 , the...
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Basic Statistical Data about the Activities of Cultural Facilities in the Czech Republic 2022. I. díl, Muzea, galerie, památky
Nováková, Eliška ; Lindnerová, Vladimíra ; Národní informační a poradenské středisko pro kulturu - Centrum informací a statistik kultury
Předmětem zjišťování je činnost muzeí, galerií, památníků a památkových objektů. Nejvýznamnější šetřené ukazatele se vztahují k rozsahu sbírek, návštěvnosti, pořádání výstav, expozic, vzdělávacích programů, odborných konferencí a seminářů a v neposlední řadě k zaměstnanosti a hospodářským výsledkům činnosti.
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The pragmatic competency of students of Japanese - speech act of refusal
Nováková, Eliška ; Kanasugi, Petra (advisor) ; Tirala, Martin (referee)
(in English): This thesis focuses on pragmatic competence of Czech students of Japanese, specifically on the speech act of refusal. The aim is to find out how students differ in comparison to native speakers of Japanese. Another aim is to compare Japanese students based on the length of their stay in Japan, their Japanese proficiency, and the textbook used at the beginner level. The theoretical part describes pragmatic competence, politeness theory, the speech act of refusal and its specifics in Japanese. The practical part focuses at the analysis of refusals from the Discourse Completion Task (DCT) using semantic formulas. Usage of these formulas by native speakers and student are then compared. Found differences from the native speakers are further examined among students according to Japanese proficiency, length of their stay in Japan and textbook used at the begginer level. Finally, the results are summarized.
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Determination of selected elements in cereal flours and their gluten-free alternatives
Venclová, Veronika ; Hraníček, Jakub (advisor) ; Nováková, Eliška (referee)
This study deals with the determination of calcium, magnesium, phosphorus, potassium, sodium, iron, zinc, copper, manganese and molybdenum in cereal gluten flours and its gluten-free alternatives. The flour samples were digested using a microwave device and the elements in solution were subsequently determined using an inductively coupled plasma mass spectrometer. Optimization of the digestion of the selected flours was performer prior to the actual determination of the elements. The aim of the work was to determine the above listed elements in the flour samples and to establish a basic overview of the elemental composition of the different flours. This overview and comparison of the different flours is intended to help the people with celiac disease to choose gluten-free alternatives to wheat flour. Keywords Inductively coupled plasma mass spectrometry, microwave digestion, calcium, magnesium, phosphorus, potassium, sodium, iron, zinc, copper, manganese, molybdenum, wheat flour, gluten-free flours, celiac disease
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