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Dissertations / Theses on the topic 'Parametre povrchu'

Author: Grafiati

Published: 28 June 2021

Last updated: 6 February 2022

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1

Šindelka, Marek. "Pokročilé metody vyhodnocování topografie povrchu součásti." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401048.

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This thesis focuses on a measuring and topography of a components´ surface evaluation and it contains the overview of basic methods which includes the description of contact and non-contact measuring devices. Furthermore, the thesis also describes ways of surface texture evaluation through profiled and areal method, including an outline of ČSN ISO parameters. The practical part of the thesis focuses on the evaluation of metric threads´ M10 surface, crafted by diverse cutting and forming threads. The surface was scanned with the optical device called Alicona IFM G5 and it was evaluated through the profiled and areal method. The 2D and 3D parameters were acquired and then compared during the measuring.

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2

Adamus, Petr. "Pokročilé metody vyhodnocování topografie povrchu pro dokončovací obrábění." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417413.

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The main theme of this thesis is the surface topography evaluation. The theoretical part introduces the fundamental methods of evaluation, measuring instruments and describes profile and surface topographic parameters. In the practical part, the influence of different cutting conditions in high-feed face milling was researched on sample made of aluminium alloy 7475-T7351. For the surface topography evaluation of all samples the measuring device Alicona IF G5 was used. The last part of the diploma thesis is devoted to the economic influence of cutting conditions on the process of high-feed face milling.

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3

Fuciman, Lukáš. "Rozbor a zhodnocení vlivů textury povrchu zkušebních vzorků." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417440.

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The thesis deals with an evaluation of the surface texture of various materials, created by machining technologies (turning, milling and grinding). As for the theoretical part of the thesis, it contains a theoretical analysis of the effect of surface texture on friction, wear, coating and lubricating properties. The main emphasis is put on the analysis of the most frequently evaluated profile and surface parameters as well as their possible influence on the functional areas of machined parts. The experimental part includes evaluated and compared measured data based on the monitored parameters with benefits for machinery industry.

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4

Špačková, Magda. "Využití parametrů textury povrchu pro posuzování shody a řízení procesu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-378405.

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This master‘s thesis deals with using surface texture parameters for conformity assessment and process control. The aim of the thesis was to create an overview of surface texture parameters, an overview of procedures for conformity assessment and process control using surface texture parameters, practical application on an industrial product and practical recommendations. The thesis includes an overview of profile and areal surface texture parameters, including an original translation of terms of the areal method. Methods of conformity assessment and process control in connection with the surface texture parameters are also described. Statistical analysis was performed based on 7200 values of surface parameters and 1843200 values of profile parameters which were measured on parts from serial production. The last chapter includes practical recommendations.

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5

Rožnovský, Michal. "Využití analýzy parametrů textury povrchu při výrobě pistole." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-402510.

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The diploma thesis deals with the analysis of surface texture parameters during pistol production. The aim of the diploma thesis was to formulate requirements for pistol quality, to analyze the existing production process of the chosen pistol component, to analyze the texture of the functional surface after selected technological operations with a proposal for correction of the manufacturing process and recommendations for practice. The work includes mapping the life cycle of the pistol with a focus on the technological procedure of processing the main part of the pistol - the slide of the pistol. The surface texture of surface texture is also described, depending on the measurement of the defined area. Based on 250 measured and evaluated surface texture parameters, recommendations for correction of the manufacturing process and recommendations for the design and development of the pistol were formulated.

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6

Vančurová, Martina. "Využití souřadnicového měřicího stroje pro hodnocení kvality povrchu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-378396.

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This master’s thesis deals with the use of a coordinate measuring machine probe for surface texture evaluation. The thesis’ goals were to describe the Renishaw’s SFP2 probe, to analyze the measurement system of the probe and a common stylus instrument, to carry out a demonstrative measurement, to analyze measurement results and to give practical recommendations. The measurement system analysis of the SFP2 consists in the evaluation of minimal specification limits of selected roughness parameters, for which gauge capability can be proven. The analysis results are compared with the results of the measurement system analysis of the Surtronic 25 profilometer. The differences in the measuring processes of mentioned devices are demonstrated by surface texture inspection of torque converter body. For the measurement result analysis, uncertainties in the selected surface texture parameters are calculated in two ways. Finally, recommendations for the producer of the probe and for its users are worked out. The results of this thesis may contribute to a wider use of a coordinate measuring machines for surface quality evaluation.

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7

Harčarík, Matej. "Měření parametrů textury povrchu výrobků kontaktní a bezkontaktní metodou." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241687.

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This master’s thesis includes an overview of profile method of surface texture evaluation according to ISO standards and VDA automotive standards, as well as an overview of areal method according to ISO 25178 standard series, which includes a proposal for improvement of czech terminology. Suitability of application of selected measurement methods for measurement of a portfolio of automotive parts was evaluated based on measurements carried out using a contact profiler, a coherence scanning interferometer and a confocal microscope. Further recommendations for practice in surface texture metrology were also formulated. A regression analysis of the relationship between values of selected profile surface texture parameters and their areal equivalents was also performed. Its results may aid the spread of areal surface texture evaluation in the industry.

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8

Boháč, Martin. "Zpracování obrazu při určování topografických parametrů povrchů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228823.

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This work deal with determination topohraphic parameters of a randomly rough surface by the help of method of shearing interferometry. It is a optical method for determination surface roughness. The basic idea is based of on deformation interference strips which are made by interference of the same mutually translated monochrome luminous wavefronts. The wavefront is created after transit or reflection monochrome lights from the surface of a studied sample. The wavefronts creates picture with deformed interference strips , which carries information about character of the surface. This information can be profited by algorithms of image processing from the picture . The thesis was developed in research project MSM 0021630529 Intelligent Systems in Automation.

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9

Škeřík, Filip. "Hodnocení vlivu technologií obrábění na analýzu textury povrchu technických plastů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443214.

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The diploma thesis deals with the influence of machining technologies (turning, milling, grinding and polishing) on the surface texture of functional surfaces of selected materials from technical plastics. In the first part of the thesis there is a theoretical analysis of the possibilities of machining plastic materials. Furthermore, an analysis of the most commonly used parameters for evaluating the roughness of the machined surface and their effect on functionality is performed. The experimental part of the thesis describes samples preparation, analysis of measured data and subsequent evaluation with benefits for machinery industry.

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10

Schreier, Jan. "Vliv parametrů vazebného média a struktury povrchu na kvalitu snímaného signálu akustické emise." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230124.

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This master’s thesis deals with the influence of different AE sensor couplants and surface roughness on the selected acoustic emission parameters. There are compared the amplitude of the signal measured using five different couplants at 20°C and 80°C. To monitor the effect of surface roughness on the AE parameters simple measuring product was constructed. Its functionality has been verified by implementation of basic experimental measurements.

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11

Mareš, Pavel. "Souvislost vad řezu s řeznými parametry při řezání abrazivním vodním paprskem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230789.

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The aim of this thesis is to determine the area where there is no random step change in cutting edge roughness. This area is established on the basic of samples created by the abrasive water jet cutting method with variation of technologic parameters.

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12

Pecháček, Martin. "Hodnocení kvality povrchu při řezání u technologie AWJ a WJM." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-228934.

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This study deals with technology of abrasive water jet material cutting and influence of cutting head feed rate on surface topography of cut walls with regards to roughness. Eight parameters were chosen based on the CSN EN ISO 4288 standard representing quality of surface after AWJ cutting. When AWJ cutting the chosen material – commercially pure ASTM B265 grade 2 titanium – feed rate was being changed and in order to obtain information about each parameter´s distribution in various depths of the cut, surface composition was evaluated. It was found out that feed rate has significant influence on surface and that the profile elements´ width grows when increasing the feed rate and cut depth. Furthermore, two selected feed rate results were compared to laser beam technology and conclusion for the selected material was made that AWJ cutting is more preferable due to final roughness and no heat affect on the material.

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13

Varava, Anastasia. "Kalibrace koherenčního rastrovacího interferometru Talysurf CCI." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318094.

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This master’s thesis deals with calibration of a coherence scanning interferometer Talysurf CCI Lite. Basic terms related to surface texture evaluation were described along with selected profile and areal surface texture parameters. The working principle and design of the calibrated instrument were explained. Manufacturer’s calibration procedure was analyzed in relation to the definition of calibration in the International vocabulary of metrology. Further calibration steps leading to calculation of measurement uncertainty were presented. Last but not least, measurement uncertainties of areal surface texture parameters Sq and Sz were evaluated. The procedures and results described in this thesis may contribute to wider use of non-contact surface texture measuring instruments.

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14

Poláček, Tomáš. "Parametry mazací vrstvy a třecích povrchů v kontaktu pracujícím v režimu superlubricity." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443755.

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The work investigates the reduction of friction between non-conformal macro contacts with partial slip. The measurement of the coefficient of friction, with the magnitude of the superlubricity, is extended by the influence of relative slip, direct observation of the contact area and the measurement of the thickness of the lubricating film. It also includes a comparison of changes in topography by friction. The experiments were mainly performed on a ball-on-disk tribometer with measuring the film thickness by colorimetic interferometry. The surface roughness changes were investigated using an optical profilometer. The effect of mean velocity, slide-to-roll radio and topography were observed for selected combinations, one of which did not allow the measurement of film thickness and one did not achieve the expected reduction in friction. For the other combinations, it was possible to observe a reduction of the coefficient of friction to 0,003 or less. The influences affecting the friction between selected materials have been investigated considerably. Thus, a foundation is laid for the research of superlubricity between contacts with partial rolling. The thesis could contribute to the reduction of friction losses, earlier(quicker/faster?) and more common use of some lubricants and materials in mechanical engineering.

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15

Dömény, Tibor. "Analýza vlivu parametrů procesu broušení na integritu obrobené plochy se zaměřením na zbytková napětí." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228822.

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Since grinding is often the last process of a manufactured part, caution has to be taken in order to ensure the integrity of the surface. The role of grinding induced residual stresses can be important in fatigue or wear resistance. In most cases we cannot evaluate accurately and easily their distribution. On this purpose, many scientists are working on the modeling of grinding and its effects on a many points. The main aim of this work is to analyse of residual stresses influenced by grinding parameters.

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16

Krajkovič, Pavel. "Optimalizace obráběcích parametrů abradable nástřiků používaných v leteckém průmyslu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231999.

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This thesis is focused on machining of thermal spray coatings. Particularly on testing of machining parameters and their influence on different types of abradable coatings used in the aerospace industry. The aim of research work is to test the parameters, measure cutting forces by using a dynamometer and their impact on the quality of the machined surface. Determination of the optimal machining parameters for different types of coatings based on results of measurements and the evaluation of surface quality. There are also presented techniques of thermal spray application and methods of coating evaluation. Further it describes a method of measuring cutting forces by using the dynamometer and methods of surface quality evaluation.

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17

Kadlček, František. "Vodní paprsek ve strojírenství." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-444282.

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This diploma thesis deals with the principle of the abrasive jet and describes the devices needed to create it. The thesis presents an analysis of technological parameters and their impact on the quality of the cut. Subsequently, this thesis deals with an experiment, which consists in the design of technology for a sample component, followed by evaluation of surface quality and the economic evaluation.

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18

Bukáček, Zdeněk. "Technologie obrábění tvrdých materiálů nástroji s definovanou geometrií břitu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228640.

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This master’s thesis is concerned with subject matter hard machining with defined geometry edge tools. Aim master’s thesis is analysis and parameters evaluation machined surface at hard machining. This master’s thesis contain a characteristic of hard materials, used technology for cutting operation, but also tools and cutting conditions suitable for hard machining. In the conclusion are parameters evaluation machined surface the workpiece.

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19

Prokeš, Tomáš. "Optimalizace řídicích parametrů EDM stroje." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-446793.

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The dissertation thesis is focused on the optimization of control parameters of an EDM machine; the subject of optimization is cutting speed and surface topography. The first part of the thesis contains a research study on the technology of electrical discharge machining with the attention paid to the optimization methods use for control parameters of this process. The second part of the thesis is focused on real application of knowledge gained from studied sources. Here, a design of experiment aim at optimizing the parameters of the EDM machine is designed and carried on to maximize the cutting speed with the highest possible surface quallity. The result of the work is to build adequate regression models and find the optimal setting of machine control parameters.

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20

Klimek, Ľubomír. "Vývoj procesních parametrů slitiny mědi pro 3D tisk tenkostěnných struktur." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-379039.

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In the work is used the processing of metallic material by the method of Selective Laser Melting. The main objective is to verify and describe the influence of the individual process parameters entering the production process when processing the alloy Cu7.2Ni1.8Si1Cr with SLM. This alloy contains 90 % copper. The first theoretical part of the thesis describes so far processed copper alloys with a high content of copper using the method of Selective Laser Melting. The practical part then deals with the specification of the main process parameters, which are optimized in the next part of the work solution. On the basis of the information obtained experimental bodies have been created, which will be tested and analyzed in several steps. The work focuses on thin-walled samples, which have a perspective use in the creation of highefficiency heat exchangers. The main results that the work deals with are the relative density and mechanical properties of the material. Also, great emphasis is placed on the resulting surface quality

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21

Mateášik, Timko Marek. "Experimentální ověření pasivních prvků tepelné regulace družic." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443228.

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Diplomová práca sa zaoberá vplyvom termálnych medzivrstiev na tepelnú kontaktnú vodi- vosť a tepelný kontaktný odpor. Práca sa zameriava na aplikáciu termálnych medzivrstiev pre vylepšenie tepelnej kontaktnej vodivosti v tepelnom spínači a v kozmických zariade- niach obecne. Teoretická časť práce stručne skúma rôzne pasívne termálne kontrolné systémy použí- vane v kozmických zariadeniach, vrátane termálnych medzivrstiev, a vysvetľuje pozadie tejto práce. Táto práca ďalej skúma rôzne termálne medzivrstvy, predovšetkým povlaky a fólie, a uvádza výber vhodnej termálnej medzivrstvy. Experimentálna časť práce skúma povrchové parametre, tepelnú vodivosť a mikrotvr-dosť medených vzoriek, ktoré slúžia ako substrát pre povlak čistého striebra. Ďalej rieši podmienky merania, metódy vyhodnocovania a samotné experimentálne merania. Experimentálne merania sú vykonané v termo-vákuovej testovacej komore a na základe výsledkov sú vyvodené závery. Pre ďalšiu prácu sú uvedené doporučenia.

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22

Čada, Jiří. "Povrchové změny v závislosti na parametrech FDM tisku." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-240955.

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This thesis deals with a construction of modified RepRap 3D printer Rebel II which operates with Fused Deposition Modeling technology and selection of suitable criterion for printing. It mainly focuses on the temperature of the material being printed and speed of printing for three selected materials. Materials were selected based on availability in the market and their application. An experiment, focusing on surface changes of products as well as on the look of a fibre after passing through a nozzle, was performed.

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23

Pilarčík, Edmund. "Studium kvality řezu hliníkových a Cu slitin při tavném řezání v závislosti na procesních parametrech při laserovém dělení s využitím YbYAG vláknového laseru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241860.

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The diploma thesis discusses laser cutting of non-ferrous metals using fiber YbYag laser and evaluation of the roughness of cutting edge samples. To manufacture samples of aluminium Al 99,5, deoxidized copper Cu – DHP and brass CuZn37 were used combinations of process parameters according to Taguchi statistical method. Samples were subsequently evaluated, according to the ČSN EN ISO 9013 standard and sorted into roughness cathegories, and by technical and economical evaluation, the most economical process parameter combinations were found. Experimantal part is preceded by description of general methods of cutting, description of laser types, process parameters and their influence on the occurrence of the cutting edge defects and description of roughness measurement and standard ČSN EN ISO 9013.

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24

Jermolajev, Štěpán. "Kontinuální odvalovací broušení čelního ozubení." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230504.

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The diploma thesis deals with the technology of continuous generating gear grinding. With reference to this technology, used grinding wheels and grinding machines are described. A detailed analysis is devoted to the technological parameters of the grinding process and their influence on the resultant tooth flank surface integrity. In order to verify described rules, the diploma thesis contains results of practical experiments as well.

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Makki, Zbyněk. "Optimalizace chlazení synchronního stroje." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-239932.

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The main goal of doctoral thesis is optimization cooling of the synchronous machine. Problem is solved based on the finite element method with use of ANSYS software. Work is built up from theoretical part where is comparison of base equations for heat transfer and simulations for several models. Next part shows us two methods how simulate free and force convection. Depends on the better method from the previous two methods is used for next calculations with several algorithm which are used for find of best parameters for synchronous machine. Our control parameter is mass flow rate.

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Novák, Vít. "Vysokorychlostní frézování dřeva - vliv nástroje a parametrů obrábění na kvalitu obrobené plochy =:High-speed milling - influence of tools and cutting parameters of the surface quality /." Doctoral thesis, 2011. http://www.nusl.cz/ntk/nusl-176477.

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KUNTZMAN, Jan. "Vliv různých typů krajinného pokryvu na fyzikální parametry povrchu krajiny." Master's thesis, 2018. http://www.nusl.cz/ntk/nusl-376089.

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The aim of the thesis was understanding the energy fluxes in different types of land cover. The area of interest is located in Novohradské hory in the basins of Váčkový and Pasecký potok. On a relatively small area there are five different types of land cover to be found (field, forest, permanent grassland, wetland and built-up area). For each of the types of land cover three properties of the surface were calculated: amount of vegetation on the surface, wetness of the surface and surface temperature. Moreover, soil heat flux, latent heat flux and sensible heat flux were established therefore surface thermal balance was evaluated. Results were statistically processed with boxplot diagrams as an outcome. The results support the hypothesis of vegetation having a positive effect on microclimate conditions. Especially the permanent cultures (wetlands, permanent grassland, forest) demonstrated much larger microclimatic stability and balance as well as capability of keeping moist. Thanks to insufficient intensity of vaporization (due to lack of water), built-up areas showed higher surface temperatures and sensible heat flux at most of the cases. Vegetation is capable of holding water and redistributing it in an environment via evapotranspiration. Thus, solar energy is stored inside of the water vapour which condensates on cool objects releasing the energy spent during the vaporization process. Water moves in the landscape through the local-scale water cycle stabilizing the microclimate.

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Maierová, Petra. "Odhad reologických parametrů ledových měsíců na základě pozorovaných deformací povrchu." Master's thesis, 2008. http://www.nusl.cz/ntk/nusl-292844.

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29

PÁLKA, Václav. "Vliv užití separované hovězí kejdy jako plastického organického steliva na čistotu povrchu těla a etologické projevy ustájených krav a vybrané parametry stájového prostředí." Master's thesis, 2009. http://www.nusl.cz/ntk/nusl-51388.

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The observation was performed in brick buildings for dairy cows breeding. The stabling was created as lose boxes with litter (made from separated slurry) and with grid dung-passage. The aim of the work was assessed evaluation the availability of separated slurry used as a plastic litter from the animal cleanness, welfare and microclimatic parameters of stabling. During experiment was ascertained, that not founded negative impact at the animals.

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