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Contactless temperature measurement in sliding contacts
Knoth, Tomáš ; Hajžman, Michal (referee) ; Omasta, Milan (advisor)
This work deals with the implementation of infrared thermography for detailed temperature mapping in conformal sliding contacts in a pin-on-disc configuration. The implemented method is then applied for study of textured sliding contacts. This method can bring unique insights into the temperature distribution in contacts with textured surfaces, where thermal phenomena play a crucial role. The current state of knowledge in this area relies mainly on numerical simulations, which is why the absence of experimental knowledge is a fundamental gap in knowledge. The research questions are devoted to the temperature distribution in contact and the demonstration of the occurrence of the so-called viscosity wedge effect. Hypotheses are built on the basis of works that study the issue using numerical simulations. The implementation of the method is based on the calibration and measurement procedure from the area of point contacts, where the ball-on-disc configuration is used. This method of calibration was confronted with applications on conformal textured surfaces and subsequently modified according to identified needs. In the second part of the work, contacts with textured surfaces are analyzed using the implemented method. The subject of interest here is parallel and near-parallel contacts. On the correction of the Stribeck curve according to the actual temperature of the lubricant, it is demonstrated that knowledge of the actual temperature of the lubricant in contact is essential for its study. However, the occurrence of thermal phenomena could not be proven in the range of experimental conditions.
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Elaboration of examples for teaching visualizations in Inventor
Hejl, Vojtěch ; Odehnal, Lukáš (referee) ; Košťál, David (advisor)
This bachelor’s thesis describes functions of Autodesk Inventor that deal with visualizations and the creation of excersises for students on this topic. For this purpose were created three powerpoint presentations describing the functions of this program concerning visualizations and methods of creating visualizations of objests. These excersises are comprised of a powerpoint presentation, model and textures. The ability to use visualization tools of Inventor is aplicable in marketing or design. It enables the creation of visualizations greatly resembling real life objects without the need to create these objects beforehand.
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Procedural Texture Generator
Doroshenko, Ilya ; Karas, Matej (referee) ; Milet, Tomáš (advisor)
Textures are an essential part of modern 2D and 3D rendering. The most prominent texturing techniques are Texture Mapping and Procedural Generation. Both techniques have their set of demands on computational resources. Procedural generation provides rich detail resolution without memory consumption, but also requires processing power. Texture Mapping is quick to process, but images, that the texture consists of are using a lot of space in memory and have finite resolution and sets of complications around algorithms that try to overcome that problem. This thesis discusses techniques of texture generation their interchangeability and applications. Result is an extensible application, that can produce texture maps from algorithms and can export algorithms to be used in procedural shading techniques.
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Autopsy
Hofmann, Petr Eric ; Záhora, Zdeněk (referee) ; Vaněk, Vojtěch (advisor)
This bachelor thesis is focused on digital games, namely the creation of game objects and virtual space. An existing room was used as the main object, which was the auditorium at FFA. The outcome of this project is a computer app bringing users the possibility to explore the digital model of the auditorium. The digital technologies are providing us with a completely different point of view regarding the already existing room. The video game's interactive principles allow us to look closer at the image layers, called textures, responsible for the final look of a game object. The emphasis of this project is to communicate mainly with the help of visual language which will reduce the need for greater amount of textual information towards the user. The content can be unlocked by navigation through an intuitive user interface, an ingame tool to control the play. The title "Autopsy" was chosen as an allegory to the process of finding and gaining new information and experience thanks to the dismantling of a researched subject just to its main core. The autopsy room is not just a room, where the action happens, it is the action itself.
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Numerical model for the origin of magmatic textures and its application to the Fichtelgebirge/Smrčiny granite batholith
Špillar, Václav ; Dolejš, David (advisor) ; Ježek, Josef (referee) ; Žák, Jiří (referee)
Magmatic processes are major agents responsible for the formation and differentiation of the Earth's crust. In contrast to extensive efforts to improve understanding and utility of igneous geochemistry, physical processes of magma differentiation and solidification remain largely unclear. Large variability of igneous textures provides record of these processes and intensive parameters governing the crystallization. In this thesis, we develop quantitative methods, which allow us to better interpret igneous textures in the framework of physics of solidification. We have developed a new three-dimensional model of crystallization from one- component melt driven by homogeneous and heterogeneous nucleation and crystal growth. The predicted textures are quantitatively characterized by crystal size distributions, spatial distribution functions and parameters representing grain contact relationships. The model employs high resolution in a large volume simulation domain in order to produce statistically stable results. Our simulations, performed for various functional forms of nucleation and growth rates with respect to time, imply that (i) crystals are ordered (anti-clustered) on short length scales. This reflects that other crystals already have a finite size at the time of nucleation of younger crystal,...
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Synthetic Image Noise Generators
Sigmund, Pavel ; Herout, Adam (referee) ; Španěl, Michal (advisor)
In this work I'm implementing library for generating basic kinds of noises which I'm also using for generating procedural textures and height maps . I have focused on K. Perlin method frequently used for making textures with nature-based motives, like wood, marble or clouds. I've implemented this method into the library to make 2D and 3D textures. Library used for generating noises, thanks to its variability, is not ment as a source of generated pseudo-random numbers for K. Perlin method only, but we can also use it as a tool to add a noise to any kind of data.
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Procedural City
Dolejška, Daniel ; Chlubna, Tomáš (referee) ; Milet, Tomáš (advisor)
The goal of this thesis is to implement configurable tool (program), which will be able to build a model of a city. The program uses OpenGL library and principles of procedural generation for model creation. The generation process itself has a number of customizable variables, which have direct impact on the visuals of the models, their complexity and size. Created models can be exported and further modified in almost any 3D graphics software.
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Creation and Demonstration of Assets for VR Application
Zouhar, Marek ; Tóth, Michal (referee) ; Milet, Tomáš (advisor)
This thesis deals with the concept of virtual reality, its history, present-day possibilities and available devices and technologies for virtual reality and ways of creating assets such as models, textures and animations for virtual reality applications. The practical part of this work deals with design and creation of three-dimensional models, textures, animations and environment for use in interactive application in virtual reality and also with design and creation of such application to demonstrate their use.
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Numerical model for the origin of magmatic textures and its application to the Fichtelgebirge/Smrčiny granite batholith
Špillar, Václav ; Dolejš, David (advisor) ; Ježek, Josef (referee) ; Žák, Jiří (referee)
Magmatic processes are major agents responsible for the formation and differentiation of the Earth's crust. In contrast to extensive efforts to improve understanding and utility of igneous geochemistry, physical processes of magma differentiation and solidification remain largely unclear. Large variability of igneous textures provides record of these processes and intensive parameters governing the crystallization. In this thesis, we develop quantitative methods, which allow us to better interpret igneous textures in the framework of physics of solidification. We have developed a new three-dimensional model of crystallization from one- component melt driven by homogeneous and heterogeneous nucleation and crystal growth. The predicted textures are quantitatively characterized by crystal size distributions, spatial distribution functions and parameters representing grain contact relationships. The model employs high resolution in a large volume simulation domain in order to produce statistically stable results. Our simulations, performed for various functional forms of nucleation and growth rates with respect to time, imply that (i) crystals are ordered (anti-clustered) on short length scales. This reflects that other crystals already have a finite size at the time of nucleation of younger crystal,...
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Tool for Designing Procedural Textures
Číž, Miloslav ; Polok, Lukáš (referee) ; Milet, Tomáš (advisor)
This thesis deals with implementation of a program library for designing and generating two-dimensional procedural textures and its GUI supportive tool. Attention was paid to common methods as well as to other computer graphics areas with effort for modifying the algorithms in order to achieve unique results. An effective way of texture representation and its concrete implementation is also presented.
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