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Ray Tracing on CUDA Architecture
Bidmon, Lukáš ; Polok, Lukáš (referee) ; Bařina, David (advisor)
This work presents utilization of CUDA capable graphic cards for ray tracing. First, the classic recursive ray tracing algorithm is presented and necessary math is explained for implemented objects. nVidia CUDA architecture is introduced in next chapter with explained differences from CPU computations. Following is the implementation scheme where modifications necessary for CUDA are discussed. Implementation chapter covers details about flow of the program and memory usage. Finally the CPU and GPU testing results are presented.
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Analysis of effect of solar radiation concentration on the thermal insulation degradation in the flat roof construction
Židek, Ondřej ; Běžel, Jakub (referee) ; Žák, Antonín (advisor)
The master´s thesis analyzes influence of direct and reflected solar radiation to heat strain and degradation of thermal insulation in the flat roof construction. In many building was a problem in a significant degradation of thermal insulation made from expanded polystyrene in the vicinity of glass surfaces. To determine the causes of this problem, it was necessary to study and test the properties of building materials and the physical nature of the effect of solar radiation on the building structure. In the introductory section lists the cases of buildings with degradation of thermal insulation and existing knowledge on this issue. The theoretical part describes the technical properties of thermal insulating materials used in the flat roof construction, nature and division of solar radiation, optical laws of light reflection and physical theory to explain the technical thermal behavior of building materials and structures. The last part describes a practical model and analyzing measured data in thermal stress in the flat roof construction. The practical part also determines the importance of different influences configuration structures using to dynamic simulations. At the end of the practical part they are validated theoretical knowledge obtained by analyzing data from a practical model.
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Spin wave propagation in structures with locally modified magnetic anisotropy
Roučka, Václav ; Flajšman, Lukáš (referee) ; Urbánek, Michal (advisor)
Zařízení založená na spinových vlnách mají potenciál být využita ve výpočetní technice s nízkou spotřebou energie. Pro úspěšné využití je samozřejmě potřeba spojit více takových zařízení na jednom čipu, součástí čehož musí být zatáčení spinových vln zahnutými vlnovody. Problém zatáčení spinových vln v dipolárně výměnném režimu zatím nebyl uspokojivě vyřešen, vyzkoušené přístupy vedly ke ztrátě intenzity a fázové koherence. V této diplomové práci jsme zkoumali dva systémy, které by mohly být využity k zatáčení spinových vln. Prvním z nich jsou tenké metastabilní vrstvy slitiny železa a niklu. Paramagnetická metastabilní fcc vrstva, která byla epitaxně narostena na substrátu z mědi, může být transformována do stabilní ferromagnetické bcc fáze pomocí fokusovaného iontového svazku. Tato technika nám dává prostorovou kontrolu nad transformačním procesem a strategie skenování svazkem nám dokonce umožňuje určit směr mangetické anisotropie. Magnetické vlastnosti struktur vytvořených touto metodou a lom spinových vln mezi doménami s odlišným směrem magnetické anisotropie byly změřeny pomocí mikroskopie Brillouinova rozptylu světla. Druhým zkoumaným systémem jsou zvlněné vlnovody, jejichž zvlnění indukuje magnetickou anisotropii. Zvlnění magnetické vrstvy je vytvořeno depozicí nemagnetických vlnek na substrátu indukovanou fokusovaným elektronovým svazkem a následnou depozicí magnetického materiálu. Byly vyrobeny různé návrhy zatočených zvlněných vlnovodů a změřili jsme šíření spinových vln jejich zatáčkami pomocí mikroskopie Brillouinova rozptylu světla. Využili jsme také mikromagnetické simulace pro získání hlubšího porozumění zkoumané problematiky a pro hledání vhodných návrhů experimentů.
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Rendering Biliard Balls Using Distributed Ray Tracing
Krivda, Marian ; Juránek, Roman (referee) ; Herout, Adam (advisor)
This thesis is concerned in the method of realistic rendering using a distributed raytracing. This method simulates various visual effects and generates high realistic 2D images. The work analyses the problem and explains principles of solution related to this technique. There is also descriprion of the method of simple reytracing which provides a basis for the distributed raytracing. A part of work is specialized for optimalization of distributed raytracing.
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The influence of tomato ketchupes production technology on retention of nutritionally significance ingredients
Smolka, Bronislav ; Voldřich, Michal (referee) ; Ing.Helena Čížková, Ph.D. (advisor)
The work was focused on the verification of influence of quality of raw material and time-temperature conditions on the retention of nutritionally and sensory important components of the ketchups and other tomato based products. The goal of the theoretical part of this diploma thesis was the optimization of procedure of Czech tomato cultivar selection according to the highest refraction and intensive red colour. The influence of tomato ketchups production technology on retention of nutritionally significant ingredients was observed within the practical part. The samples of ketchups were sampled during different steps of production within one batch in company OTMA Sloko Mařatice. It was ketchup which was preserved by pasteurization in the glass bottle and ketchup which was preserved by hot filing to the plastic bottles. The content of lycopene, ascorbic acid, colour, viscosity, refraction and pH were measured in those samples. Furosine had been chosen as marker of thermal stress on material. The technologies can be compared on the basic of measured values from the view of retention or changes of nutritionally and sensory important components.
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Analysis of an Electromagnetic Wave on the Boundary between Electromagnetic Materials
Kadlec, Radim ; Lazar, Josef (referee) ; Macháč, Jan (referee) ; Kroutilová, Eva (advisor)
The proposed dissertation thesis contains an analysis of conditions on the boundary between layers having varied electromagnetic properties. The research is performed using consistent theoretical derivation of analytical formulas, and the underlying problem is considered also in view of multiple boundaries including the effect of the propagation of electromagnetic waves having different instantaneous speed. The author presents a survey and formulation of the basic characteristics of methods used for electromagnetic wave propagation analysis; in this respect, special emphasis is placed on radial models. The processing of the topic involved the designing and verification (using a set of different, layered planar materials) of algorithms to analyze the electromagnetic field components. The algorithm was assembled to enable simple evaluation of all components of the electromagnetic field in relation to the speed of the wave propagation in a heterogeneous environment. The proposed algorithms are compared by means of different numerical methods for the modelling of electromagnetic waves on the boundary between materials; moreover, electromagnetic field components in common points of the model were also subject to comparison. When in conjunction with tools facilitating the analysis of material response to the source of a continuous signal, the algorithms constitute a supplementary instrument for the design of a layered material. Such design enables the realization of, for example, recoilless plane, recoilless transition between different types of environment, and filters for both optical and radio frequencies.
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Graphics Intro 64kB Using Ray Tracing
Krupa, Martin ; Navrátil, Jan (referee) ; Herout, Adam (advisor)
The object of my bachelor's thesis was to get acquainted with phenomenon of graphics intro with limmited size, to study actual display techniques, which are using real-time ray tracing and make own graphics intro by using these techniques and executable of this intro is limmited to 64kB. The work also briefly introduces history of making graphics intros and reasons for their creation. It contains description of techniques used to create intro and comparation of them. This work also describes own implementation of aplication and its results. Finally there is evaluation of thesis and ways of improvements.
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Distributed Ray Tracing
Slovák, Radek ; Jošth, Radovan (referee) ; Herout, Adam (advisor)
This project describes method for global display of distributed ray tracing. The method generates high quality and realistic two-dimensional images from mathematical specification of scene. The methods for solution of this issue are presented and analyzed. Integral part of this method - conventional ray tracing - is also presented.
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Rendering of Terrain and Water Surface in a Computer Game
Kopecký, Marek ; Kajan, Rudolf (referee) ; Herout, Adam (advisor)
This bachelor's thesis deals with rendering of water and terrain, which is a key part of many computer games and simulations. The resulting application runs fluently and is powered by XNA Framework. Rendering of terrain includes multi-texturing and lighting. The water simulation includes reflection and refraction of ray on water surface. Foam is rendered on the bank of water. Water waves are computed using the inverse discrete Fourier transform.
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