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On-the-fly compression in time-domain ultrasound simulations
Klepárník, Petr ; Fura, Łukasz (referee) ; Krupa, Petr (referee) ; Zemčík, Pavel (advisor)
Tato práce navrhuje novou kompresní metodu a její aplikaci v rámci ultrazvukových simulací v časové oblasti se specializací na cílený ultrazvuk o vysoké intenzitě (HIFU). Rozsáhlé numerické simulace HIFU, důležité pro plánování léčby založené na modelu, generují velké množství dat. Při simulaci je obvykle nutné ukládat stovky gigabajtů. Cílem použití této metody je významná úspora výpočetních prostředků při zachování dostatečné kvality simulačních výstupů. V jádru této práce jsou prezentovány experimentální simulace, které ukazují, že navržená kompresní metoda a její využití pro on-the-fly výpočet průměrné akustické intenzity během simulace přináší významné vylepšení. Hlavní výhodou je do značné míry (až 99 %) snížená spotřeba vzácného místa na disku a přibližně stejný nárok na operační paměť během simulace, což může výrazně snížit cenu výpočetní platformy. Komprese neovlivňuje nepříznivě celkovou dobu simulace. Přesnost nové metody byla vyhodnocena prostřednictvím tepelných simulací. Pomocí nové metody je dosaženo v podstatě stejných výsledků při stanovení ablatované tkáně jako u jiných přístupů.
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Interactive Cloth Simulation Accelerated by GPU
Melichar, Vojtěch ; Klepárník, Petr (referee) ; Jaroš, Jiří (advisor)
This master thesis deals with interactive cloth simulation accelerated by GPU. In the first part there is a description of all technologies used during implementation of a program. The second part discusses various simulation methods. It is mainly focused on particle systems as a most used method. These parts are followed by a design of the program, which is implemented as a part of this thesis. The program was implemented in four variants. The first variant is CPU implementation, which was then optimalized with OpenMP. CUDA implementation is based on these implementations. Last variant implemented in this thesis is optimized CUDA implementation. All these implementations are evaluated from compute complexity point of view and suitability for real time graphics.
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Algorithmic Generation of Esthetical Rhytmical Sequences
Mahnert, Jakub ; Klepárník, Petr (referee) ; Beran, Vítězslav (advisor)
The goal of this project is to design and implement a system, suited for proving or disproving the claim that it is possible to generate unique rhythmical sequences, which a human will perceive as aesthetical. In the project, a framework, aiding the design of such algorithms that create rhythmical sequences using composition was implemented. On top of it, several such algorithms were implemented with the notion to test their performance using a custom testing front end solution. From the gained data, the project tries to find correlations between the aspects of the algorithms with the resulting perceived aesthetical value as well as attempt to answer the initial conundrum.
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Building a 3D Printer
Škop, Martin ; Klepárník, Petr (referee) ; Španěl, Michal (advisor)
The aim of this Bachelor thesis is to analyse available options for 3D printing using FDM technology according to requests of cooperating company, to propose several drafts of electronical and software parts of 3D printers. This also includes their connection, functionality testing and implementation of one chosen draft. The core of this Bachelor thesis was to document the progress in building the 3D printer and also to solve arisen problems. The result of this Bachelor thesis is practical realisation of electronic part of 3D printer including basical tests. Secondary benefit of this Bachelor thesis is to explain the issue of 3D printing with the option of building custom 3D printer from PiBot components.
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Optimization of the Distributed I/O Subsystem of the k-Wave Project
Vysocký, Ondřej ; Klepárník, Petr (referee) ; Jaroš, Jiří (advisor)
This thesis deals with an effective solution of the parallel I/O of the k-Wave tool, which is designed for time domain acoustic and ultrasound simulations. k-Wave is a supercomputer application, it runs on a Lustre file system and it requires to be implemented with MPI and stores the data in suitable data format (HDF5). I designed three methods of optimization which fits k-Wave's needs. It uses accumulation and redistribution techniques. In comparison with the native write, every optimization method led to better write speed, up to 13.6GB/s. It is possible to use these methods to optimize every data distributed application with the write speed issue.
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Acceleration of 3D Image Processing Using GPU
Kozovský, Radoslav ; Klepárník, Petr (referee) ; Španěl, Michal (advisor)
p { margin-bottom: 0.21cm; direction: ltr; color: rgb(0, 0, 0); line-height: 150%; }p.western { font-family: "Times New Roman",serif; font-size: 11pt; }p.cjk { font-family: "Times New Roman",serif; font-size: 11pt; }p.ctl { font-family: "Times New Roman",serif; font-size: 12pt; } The aim of this work is to accelerate the calculation of selected 2D and 3D image filters using GPU using OpenCL. Specifically, it deals with the implementation and comparison of various variants of Sobel's edge detector and Gauss filter using global or local memory. Acceleration has been achieved on 3D filter variants. On 2D filter variants, the overhead for data transfer to and from the GPU was too high.
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3D Interface for Web Pages
Klepárník, Petr ; Beran, Vítězslav (referee) ; Szentandrási, István (advisor)
This thesis discusses the possibility of creating 3D Web sites. It primarily focuses on accelerated real time rendering of 3D scenes in a web browser. It uses a web-based graphics library WebGL. This thesis also deals with design of 3D user interface, and implementation of Web pages via JavaScript (WebGL). Finally, user assessments on the proposed implementation are evaluated and the overall results are discussed.
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Parametric Geometry Sketch Tool
Čižmarik, Roman ; Klepárník, Petr (referee) ; Zemčík, Pavel (advisor)
The aim of this work is to design and implement parametric geometry sketchtool. The solution to this problem consists of two parts, to create a library of base dynamic geometry functions and GUI. Functionality of the created library will be demonstrated by two user interfaces, each using the library in different way. Using the resulting library and toolkit Qt allows to quickly and easily create new geometric sketchtools.
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My 3D Printer
Mošner, Ladislav ; Klepárník, Petr (referee) ; Španěl, Michal (advisor)
This thesis deals with the topic of 3D printing. The primary aim was to build a real printer with a stiff construction minimizing clearance, which affects the accuracy and quality of printing. The design of the 3D printer and its parts was highly influenced by the RepRap project, especially by the Rostock printer using the delta kinematics and Fused Deposition Modeling. The printer electronics is based on the Arduino Mega 2560 platform running a modified Marlin firmware. It uses a newly designed extruder that should prevent a filament from melting in a guide tubule due to a large heatsink. The experiments carried out show that the accuracy of the printer is within +-0,1 mm.
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Acceleration of 3D Image Processing Using GPU
Jochlík, Jakub ; Klepárník, Petr (referee) ; Španěl, Michal (advisor)
This thesis proposes a solution for acceleration of large 3D image data filtering by using the compute power of graphic cards. This solution uses OpenCL platform to dedicate all necessary computation onto graphical core of the graphic card and furthermore optimize this process using on-board local memory. Design and implementation of the mentioned approach is mainly focused on Sobel Operator.
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