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Adjustment and debugging of resolver including practical measurement
Bárta, Tomáš ; Kurfűrst,, Jiří (referee) ; Ondrůšek, Čestmír (advisor)
The goal of this thesis is create measuring station of resolver with using Analog Devices AD2S1210. The measuring station is based on the Atmel ATmega16 microprocesor and programmed in the C language. The measuring plant of resolvers to detection fault per one revolution is developed with industrial cooperation. The measuring station is made for a mobile use with onboard Pb accu. Measuring station will be used as a service device or in the manufacturing for setting the right angle of resolver on the engine. For the faults debugging of resolvers cables and other faults with the signal chain between the resolver and AD2S1210 is possible to show the SIN and COS signals on the external scope.
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Imaginary Landscapes
Hudcová, Veronika ; Bárta, Tomáš (referee) ; Kvíčala, Petr (advisor)
In the paintings of my bachelor work I'm inspired by the visuality of my dreams and the atmosphere of them. I was painting my imaginations of the imaginary worlds and landscapes. That naturaly pushed me in the sci fi theme. I used some cosmic objects and machinery I created by myself just for this case. This machinery or organisms are occupy the landscapes. I was not painting just my ideas but I was trying my paintings to give rise to imagination of the viewer. I should refer to inspiration by surrealism, especialy by the work of Josef Šíma and Toyes. Some connection is also with the Miroslaf Štolfa´s work.
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Wireless Network
Bárta, Tomáš ; Knoth, Marek (referee) ; Koch, Miloš (advisor)
This thesis describes the design model of the wireless network at Rašínovo College Ltd. After studying theoretical knowledge concerning the issues in the implementation of wireless networks, which is dealt with in the theoretical part, the practical part is devoted to its practical requirements of the customer, the current state of the infrastructure and the subsequent draft model of wireless networks in the new school premises. When processing the project that is central to this work, it was necessary to take into account many aspects such as the implementation environment, it was necessary to select the appropriate network security with regard to the purpose of the network and the sensitivity of the transmitted data. In the final part, appropriate hardware was selected and economic analysis of the project was developed.
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Neuronal coding and metabolic cost of information
Bárta, Tomáš ; Košťál, Lubomír (advisor) ; Martinez, Dominique (referee) ; Nowotny, Thomas (referee)
For most neurons, the information the neuron passes on is contained within the times of sending out electrical pulses - so-called action potentials. It is still not fully understood how to read this "neural code". The efficient coding hypothesis proposes that due to evolutionary pressures sensory systems evolved to transmit and process information in the most efficient way possible. However, the notion of efficiency seems to be different in different sensory systems. Cortical neurons keep their firing rates low to minimize metabolic expenses. So do insect olfactory receptor neurons (ORNs, the first layer of the olfactory system). Neurons in the insect antennal lobe (the second layer of the olfactory system), on the other hand fully use the space of possible firing rates to encode the maximum information about the odor. In my thesis, I studied how can single cortical neurons and their populations transmit and process information, while keeping metabolic expenses low, and also how the insect olfactory system encodes information about odors encountered in the air. In the part of my thesis about metabolically efficient information transmission I focused mainly on the role of inhibitory neurons in efficient information transmission. Through mathematical analysis and Monte Carlo simulations of spiking...
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Volterra's principle and its generalizations
Havelková, Alexandra ; Pražák, Dalibor (advisor) ; Bárta, Tomáš (referee)
The thesis concerns the Volterra principle and its validity in a more general sense. Volterra principle states that an improvement of the environment benefits predators rela- tively more than prey. To begin with, there is attention paid to the Lotka-Volterra model and in connection to it, the validity of the Volterra principle is discussed. Next, we de- fine the term of Volterra principle formally and furthermore we formulate and prove a sufficient condition of its validity. Then the focus is shifted to more complicated models, specifically Holling-Tanner and Gause models. The Volterra principle is here discussed in the context of individual equilibria in the original sense and in a generalized one. With most of the equilibria, the results show the principle holds. With those equilibria that negate the Volterra principle, the stability of said equilibria is discussed along with validity of the Volterra principle in generalized sense. 1
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Heat equation with dynamic boundary conditions
Gregor, Michal ; Bárta, Tomáš (advisor) ; Průša, Vít (referee)
In this thesis we deal with the solution of the heat equation with a dynamic boundary condition, which relates the time derivative at the boundary and the normal flow at the boundary. We first deal with the derivation of this dynamic boundary condition and its physical interpretation. Furthermore, we solve problems in one spacial dimension, where we learn the necessary techniques, which we will then use in solving more complex two-dimensional problems on a square, an annulus and a circle. We proceed using the Fourier method. We convert the problem to finding eigenvalues and eigenfunctions of the Laplace operator, which satisfy a special boundary condition. We use the results from articles that say that such constructed eigenfunctions form a complete system in a suitable space of functions and so we are able to construct a general solution as their superposition.
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Optimalizace přistání na Měsíci
Campbell, Daniel ; Milota, Jaroslav (advisor) ; Bárta, Tomáš (referee)
Nazev prace: Optimali/ace pristani na Mesici Autor: Daniel Campbell Katedra. (listav): Katedra inatematicke analy/y Vedouci bakalafske prace: Doc.RNDr. .laroslav Miluta. CSc. e-mail vedoueiho: Jaroslav.Milota'Q'mlT.cuni.c/ Abstrakt: V toto prat:i vytvoriine a /komnamo rnodol, kt.ory ])opisujo raketu pri pristani na inesiui. Urchin- za jakych okolnosti l/,e pristat a zda f'xiistnji1 kontrol. klery by niininiili/oval inno/stvi jjotrcbneho paliva pon- ziteho pri pristani. Pokud existuje. pak tento prvek najdome a doka/eme vlastnowl . Title:0ptimilisation of the moon-landing problem Author:Daniel Campbell Department:Katedra matematiuke analy/y Snpnrvisor:Doc. RNDr. Jaroslav Milota, CSc. Supervisor's e-mail address:Jarosla\.Milota'(PniJr.(.:nni.c/ Abstract: In this paper \vo are to rreate and examine a model, which describes (he motion of a rocket landing on the surface of the moon. We will determine under which circumstances it is possible to make (.he landing and determine whether there exists some way of landing that minimises fuel consumption. IT so we are to find this method and prove the desired property.
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