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Computational modelling of aerodynamic noise of flow past a solid body
Sýkora, Daniel ; Hájek, Petr (referee) ; Švancara, Pavel (advisor)
Diploma thesis is focused on computational modelling of aerodynamic noise of flow past a solid body. Computation of flow around a cylinder is performed for different meshes and time steps in initial part of the thesis. Results from every computation are compared. Computation aerodynamic noise due to flow around a cylinder is simulated in other part of diploma thesis. In the second benchmark computation, turbulent models have to be considered, because flow with high Reynolds number is turbulent. Computation is based on two different ways: acoustic analogy and direct method. A few different turbulent models is described and is analyzed influence to modelling aerodynamic noise. The results and knowledge of the benchmarks computation have been used in compu-tational modelling of aerodynamic noise of flow around simplified side view mirror. Surface (2D) and spatial (3D) simulations are performed. Based on computation modelling of aerodynamic noise of flow around simplified side view mirror has been designed new geometry, that aim is reduced aerodynamic noise and improved aerodynamic parameters.
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Modern methods for user authentication
Sýkora, Daniel ; Stančík, Peter (referee) ; Hajný, Jan (advisor)
The main focus of Master’s thesis is modern methods for user authentication. In the first part are briefly described currently used protocols and pointed out thein advantages and disadvantages. The theoretical introduction analyzes the principles of zero-knowledge authentication, password-based protocols and describes the concept of a new generation hash function. The practical part describes the specific implementation of authentication protocols - Ohta-Okamoto protocol as a representative of the zero knowledge protocols and SRP (Secure Remote Password), which represents password-based protocols. In both cases, the installation procedure is described following the analysis of their implementation (at the source code level) and then compared with the transmitted data captured by Wireshark. The SRP protocol is verified by AVISPA tool. There is summary of both protocols security analysis in the conclusion.
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Interactive Example-based Stylization of Architectural Models
Hauptfleisch, Filip ; Sýkora, Daniel (advisor) ; Pelikán, Josef (referee)
One of the ways in which architects communicate their designs is through hand-made architectural sketches. Often it would be beneficial to have a sketch drawn from several angles, but producing many sketches is time- consuming for the architect. Another interesting visualization tool could be an interactive smooth rotation around a stylized scene, which would be impossible to do by hand. Style transfer is an area from non-photorealistic rendering. It tries to solve the problem of transferring a style from an image to another one. This work introduces the current state of style transfer and compares several methods of transferring an architectural sketch style from one view of a 3D scene to another view of the same scene. The StyLit algorithm is then expanded to run the style transfer for multiple viewpoints at the same time while maintaining spatially coherent results. Finally, a method to run an interactive smooth movement around the stylized scene is introduced. 1
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Computational modelling of aerodynamic noise of flow past a solid body
Sýkora, Daniel ; Hájek, Petr (referee) ; Švancara, Pavel (advisor)
Diploma thesis is focused on computational modelling of aerodynamic noise of flow past a solid body. Computation of flow around a cylinder is performed for different meshes and time steps in initial part of the thesis. Results from every computation are compared. Computation aerodynamic noise due to flow around a cylinder is simulated in other part of diploma thesis. In the second benchmark computation, turbulent models have to be considered, because flow with high Reynolds number is turbulent. Computation is based on two different ways: acoustic analogy and direct method. A few different turbulent models is described and is analyzed influence to modelling aerodynamic noise. The results and knowledge of the benchmarks computation have been used in compu-tational modelling of aerodynamic noise of flow around simplified side view mirror. Surface (2D) and spatial (3D) simulations are performed. Based on computation modelling of aerodynamic noise of flow around simplified side view mirror has been designed new geometry, that aim is reduced aerodynamic noise and improved aerodynamic parameters.
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Modern methods for user authentication
Sýkora, Daniel ; Stančík, Peter (referee) ; Hajný, Jan (advisor)
The main focus of Master’s thesis is modern methods for user authentication. In the first part are briefly described currently used protocols and pointed out thein advantages and disadvantages. The theoretical introduction analyzes the principles of zero-knowledge authentication, password-based protocols and describes the concept of a new generation hash function. The practical part describes the specific implementation of authentication protocols - Ohta-Okamoto protocol as a representative of the zero knowledge protocols and SRP (Secure Remote Password), which represents password-based protocols. In both cases, the installation procedure is described following the analysis of their implementation (at the source code level) and then compared with the transmitted data captured by Wireshark. The SRP protocol is verified by AVISPA tool. There is summary of both protocols security analysis in the conclusion.
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