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Influences of atmospheric conditions and kind of paints for their durability in the exterior exposition.
Malinský, Josef ; Pánek, Miloš (advisor) ; Bomba, Jan (referee)
Abstract
Name: Bc. Josef Malinský, DiS.
Diploma thesis topic: Impact of atmospheric factors and the type of coating on their durability when used outdoors.
Abstract:
This thesis deals with an assessment of qualities and lacks of coatings of a particular coating system. Its result is a recommendation of the best of the evaluated coatings.
The introduction shows an analysis of the historical development of coatings and an overview of coatings in general, as well as a list of the most commonly used coating systems for the protection of wood used outdoors. The thesis describes the ways of applying coatings and the methods of correct applying coatings focussed on wood protection and durability.
The aim of the second part is to choose the best coating according to the results and parameters of the testing. This part includes a description of the preparation of tested objects, applying coatings and the way of measuring the parameters before and after the exposure of such objects to an accelerated ageing process in accordance with the Czech norm ČSN EN 927 part 6. Comparing the qualities of particular coatings results in a recommendation of the best of the coatings assessed.
The third part of the thesis describes a variability of atmospheric conditions and their impact on the results of the testing of coating systems. It results in an evaluation and assessment of particular differences in testing the particular coatings in accordance with the Czech norms ČSN EN 927 part 3 and ČSN EN 927 part 6. The aim of this part of the thesis is to answer the question whether and to what extent degradation of the tested coating is affected by the difference of climate conditions when being tested for accelerated ageing and natural ageing.
Key words: surface treatment, wood coatings, testing, outdoor exposure
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Influence of kind of wood for quality of selected paints for exterior
Blažek, Tomáš ; Pánek, Miloš (advisor) ; Zeidler, Aleš (referee)
The aim of the diploma thesis is to provide lay persons as well as specialists in the field with information about a suitable surface treatment method for various types of wood and about the impact of the choice of wood on the coating durability when used outdoors, so that they make a sound judgement upon these findings. The diploma theses is divided into several parts containing an introduction into the problem of degradation of wood used outdoors, a description of various coatings based on natural substances, various wood modifications, principles of applying the coatings, norms providing for applying the coatings. On the basis of the tests using accelerated aging it has been found that the best results had oak with chemical modification Lignofix I-profi and final surface finish with the application of outdoor oil. The aim of the thesis is to compare selected coatings based on natural substances on selected types of modified wood. Outputs of particular tests are clearly arranged to provide a clear overview of particular measurement data. The diploma thesis also includes a clear analysis of particular coating materials with respect to their acquisition costs compared to their degradation and their utility.
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Testing methods and EN standards for coatings systems - review and results of testing
Štěrbová, Irena ; Pánek, Miloš (advisor) ; Procházka, Jiří (referee)
The subject-matter of this bachelor thesis was to do the research concerning the evaluation of methods in testing the coating systems. Another aim was to evaluate, upon the analysis of the selected scientific articles from the Web of Science portal, the most effective coating system from the perspective of four characteristics (hardness, adhesion, gloss and colour change).
Upon the results of selected researches, the polyuretane coating was found to be the best in all of the examined characteristics. Then, the alkyd-based synthetic varnish gave the best results especially in adhesion. The knowledge from the research proves that the cellulosic coating has the worst results in overall durability, especially as far as the gloss, colour changes and hardness are concerned. From the adhesion viewpoint, the water-borne alkyd coating was the worst.
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Coatings for termowood - useful types and their testing.
Lišková, Tereza ; Pánek, Miloš (advisor) ; Oberhofnerová, Eliška (referee)
This work deals with specific requirements regarding finishing of thermally modified wood for exterior use.
A theoretical part includes information about features of thermally modified wood, finishing products and recommended procedures for protecting.
Next chapter describes assessment of testing procedures, use of those methods during in real scenarios, measurement and evaluation of results. Measured values are evaluated in the application STATISTICA 12 and represented using graphs and tables. It includes list of used materials, finishing products. It also describes tests made using spectrophotometer and roughness tester.
Last chapter of this works describes options how to increase color permanency of thermally modified wood. It also includes recommendations for selection of suitable finishing product.
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Design of wooden building kit
Vinopalová, Pavla ; Bomba, Jan (advisor) ; Pánek, Miloš (referee)
This thesis describes the design of wooden building kit on the principle of gears. Summarizes the problems of calculations and graphic design for gears, work with computer software, and then the laser and the CNC device. Presents the pros and cons of making such building kits in both machining methods and draws conclusions about their suitability and economy. Provides overall production process, from market research (which similar building kits are usually trade in Czech republic nowadays), the numerical and graphic design, to verifying the functionality of the prototype. The thesis is based on scientific literature that addresses the issue of gears, tooling, surface finish of wood etc. It must also take into account the Czech legislation and standards concerning toys.
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Determining the resistance of paint films due to the thickness and number of layers
Ježek, Jan ; Bomba, Jan (advisor) ; Pánek, Miloš (referee)
In the theoretical part of this work there is described the theory of coating substances: sorts of coating substances, making a coating (paint) film and requirements of coating matters. In the practical part there was being found an affect of cold liquids upon concrete coating substances, an affect of the thickness of the coating film upon the resulting surface resistence and an affect of wood upon the quality of the coating. No difference of film quality of coating substances applied to conifers and leafy wood was evidenced. The quality of coating was applied to plawood materials where pores of the upper veneer were filled with paste and so there was no difference between conifers and leafy wood. According to statistics there is no important affect upon the film quality. The coatings 80 and 150g/m2 were used, which are the limited statements of an interval recommmended by producers and the quality of coating is declared. The result: the most aggressive liquid was remover, then plum brandy, Savo liquid, vinegar and mouthwash. Jar, the preparation for washing dishes, was the least aggressive.
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Advanced features of traffic shaping for 802.3 and 802.11 networks under OS Linux
Pánek, Michal ; Endrle, Pavel (referee) ; Szőcs, Juraj (advisor)
This bachelor work deals with possibilities of traffic shaping and control in OS Linux. First part of the work examines indiviual tools needed for working with data stream. The second part consideres methods intended for traffic shaping. From these methods intended for use in standarts 802.3 and 802.11 were selected and described. The second part of paper focused on Hierarchical Token Bucket and Class-based queueing method. The third part is the practical application of methods on the hardware, the measurement of the individual standards and processing into charts.
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The Multifunctional House
Pánek, Martin ; Struhala, Karel (referee) ; Manychová, Monika (advisor)
The main concern of this thesis is to design a five-storey multifunctional house. The house is divided into the main living area to which it belongs especially residential units accessible by stairs from the ground floor and also basement boxes and room for prams. On the ground floor are also located the individual garage, store room and technology. The house has four floors and a basement, the basement are located mass garages. The house has a sloping wooden roof trusses.
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Data-flow Control on Transport Layer
Pánek, Michal ; Komosný, Dan (referee) ; Koton, Jaroslav (advisor)
In order to easily send data between two end elements without congestion, methods that suitably control flow of date and evaluate possible overload state are necessary. One such method is to control the data flow directly on the transport layer. This layer offers a range of mechanisms dedicated to deal with this issue. The aim of this paper is divided into three parts. The first part describes the integration of transport layer TCP/IP model, and the ability to process TCP data stream. The second part describes methods to manage congestion, their integration by usage environment. It mainly focuses on methods of TCP Reno and TCP Vegas. Their simulation and analysis on transmission the data stream stream. The third part deals with the analysis in detail of TCP Vegas. Analyzes possible parameters for alpha a beta within the TCP Vegas, and a combination of TCP Vegas and TCP Reno.
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Family house
Pánek, Martin ; Klimeš,, Vladimír (referee) ; Klimešová, Jarmila (advisor)
The main concern of this thesis is to design three storey family house. The house is divided into the main living area to the garage and basement areas and a part of an establishment. There is 2 floors in the house and there is partially a basement. The house has a flat roof.
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