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Static analysis of moving skyscraper
Jedlička, Michal ; Martinásek, Josef (referee) ; Vlk, Zbyněk (advisor)
The thesis is about static analysis of moving skyscraper (inspired by The Dynamic Tower). There is a rotation of each particular floor around its axis independently on each other. In this thesis, moving skyscraper is solved as a whole piece with specialization in the moving floors and their mounting on the core of the building.
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Modern numerical models of the YORP effect
Chrbolková, Kateřina ; Čapek, David (advisor) ; Ďurech, Josef (referee)
This thesis deals with the study of an non-gravitational effect called the YORP effect which affects the rotational state of irregularly shaped asteroids. In its first part, there is discussed the very physical nature of this phenomenon and further it demonstrates an effect similar to the YORP: the Yarkovsky effect. Second part analyzes several outstanding numerical models, which describe the YORP effect. It focuses on some aspects that no other models took in account and it also points out what approximations these models make. We have used two different nume- rical models on an asteroid shape of our own and we present it in the last part of this bachelor thesis. At the end of this paper, we compare our outputs with the findings of appropriate models. Our results agree with the cited articles in the majority of cases. We tried to analyze how the YORP effect depends on the chan- ging conductivity of the asteroids and we also found out that better resolution of shapes of asteroids leads to the convergence of the values of the YORP effect.
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Development of sexual characteristics of phlebotomine sand flies
Pavlasová, Michaela ; Votýpka, Jan (advisor) ; Král, David (referee)
Thesis is focused on study of phlebotomus generative attributes development and body dimension influence for some determinant notes therefore is divided into two thema parts. First thematic part of thesis is heeding to rotation of outer genitalia of chosen phlebotomus subgenus males and their representatives: Adlerius (Phlebotomus arabicus), Larroussius (Phlebotomus orientalis and Phlebotomus tobbi), Euphlebotomus (Phlebotomus argentipes), Paraphlebotomus (Phlebotomus sergenti), Phlebotomus (Phlebotomus papatasi), Lutzomyia (Lutzomyia longipalpis) and Sergentomyia (Sergentomyia schwetzi). In this parts was discovered and compared time of station of genitalia for chosen subgenera. Also the time from emergence of adults to rotation and rotation time dependence on adults daytime eclosion was measured. Times of rotation time duration including that of times from rotation beggining were at subgenuses expressively different, from S. schwetzi with the shortest rotation time of 12 hours to P. sergenti with the longest with average time rotation of 32 hours. Further were compared rotations of two genuses within subgenus Larroussius: P. orientalis a P. tobbi. Here also were each rotation times expressively different that do not validate the rotation should be specific for given subgenus. Observed was also...
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Three-dimensional kinematics of eye movements
Stodola, Marek ; Velan, Petr (referee) ; Hrdina, Jaroslav (advisor)
The goal of this thesis is to describe eye movements and general eye position using apparatus of geometric algebra. The introduction covers the theory about the appropriate geometric algebra, followed by the classifications of the eye movements and the terms used to describe these movements. Following this, the calculations that describe eye position derived from a single observed point are listed, for distant and close points. In addition, the possible eye movements in respect to the axis in which an eye can rotate is described, for any general position. All the calculations are based on Donders' law and Listing's law.
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Molecular simulations of water - rutil interface
Hanke, Hynek ; Předota, Milan (advisor) ; Lísal, Martin (referee)
Study of structural and particularly dynamical properties of the interface of water with graphite and rutile surfaces points towards anomalous behavior of water molecules close to solid matter. Evaluation of statistical properties like translational and rotational diffusivity, residence times and autocorrelation functions of orientation vectors indicates that the translation and rotation of water molecules can be not only hindered, but also facilitated, according to the particular local density, interactions and and geometrical structure of the surface. The newly developed methods for the measurement of statistical rotational properties near to liquid-solid boundary overcomes the difficulties that are closely related to the measurement of dynamical properties in strongly inhomogeneous environment in a way, that can be applied to other model systems of this type.
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Fast Re-Calibration of PTZ Camera for Traffic Analysis
Dřevo, Aleš ; Juránek, Roman (referee) ; Sochor, Jakub (advisor)
This thesis deals with problematics of PTZ-camera re-calibration during movement. The objective of this work is to keep the camera in calibration mode from default status when the known positions of Vanishing Points are in the image. With their use during movement, which is changing with motion of the camera, their positions are kept with help of two implemented methods. The first method is based on the principle of homography, the second on the principle of cross ratio. The results show that both of these methods work especially for keeping the positions of First Vanishing Points. In the case of the Second Vanishing Points there appear various problems and the results are often quite inaccurate.
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Generator for aircraft application HUMS
Zelda, Jan ; Huzlík, Rostislav (referee) ; Hadaš, Zdeněk (advisor)
Presented diploma thesis deals with development of the autonomous electric energy source for Health and Usage Monitoring Systems placed at the rear part of a helicopter. Firstly, the HUMS systems were described briefly and the research of available energy sources was made after that. After that, the magnetic properties of the materials were described with the special focus on the permanent magnets. The draft also includes the creation of model of the magnetic field using the final element method. Prototype was assembled and the other design solutions were evaluated. The evaluation of various designs passed in the use of SOMA optimization algorithms. The generator is followed by the draft of the electronics, which streamlines and regulates a voltage supplied by the generator. At the end of the thesis, the complete source prototype was assembled and tested with two different regulators
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Algebra of dual quaternions in image analysis
Hrubý, Jan ; Návrat, Aleš (referee) ; Hrdina, Jaroslav (advisor)
This work has two goals. Firstly it is to acquaint the reader with the classical use of quaternions and dual quaternions in geometry. Secondly the generalization of the Fourier transform into the set of dual quaternions. At first it goes into algebraic properties and structure of quaternions and ways of their inscriptions. Later dual numbers are introduced and consecutively with their help dual quaternions. Then the work deals with description of rotations and translations using quaternions and dual quaternions, that enable their easy description. Finally the discreet dual quaternion Fourier transform is defined, and for its effective calculation the algorithm is derived, which is then brought into effect as a code in program environment MATLAB.
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Searching in AVL Trees in C Language
Mintěl, Tomáš ; Lukáš, Roman (referee) ; Honzík, Jan M. (advisor)
This thesis engages in search in AVL tree. There are explained principles of researching methods. Consequently is in detail explained principle of utility AVL tree. The main aims of this thesis are transcribing non-recursive algorithms from Pascal to C language, create recursive analogies of this algorithms and create application for animated show of these operations.
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Evaluation of Chosen Tree Search Methods
Tříska, Vít ; Lukáš, Roman (referee) ; Honzík, Jan M. (advisor)
A function to search is widely used operation in all possible forms. Recent developments show increasing importance of far more effective search methods. That is why this work deals with an evaluation of the fastest search methods at present time, namely AVL tree, red-black tree, splay tree and skip list. Moreover, it tries to recommend them for their correct usage. A supplementary goal of this thesis is to create a learning tool (study aid), which would facilitate better understanding of pitfalls of each individual search method.
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