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Simulation of small single-phase transformer
Nevřivý, Tomáš ; Hájek, Vítězslav (referee) ; Vítek, Ondřej (advisor)
This bachelor‘s thesis deals with the complex design of single-phase transformer for low power transfer. The basis of the work is procedure of design referred to standardized tables together with the analytical calculation of all transformer parameters. The calculated parameters are verified using by finite element method in the environment of the program FEMM. Analytical calculation is verified by simulation in stationary and quasistationary magnetic field. The conclusion of the work is supplemented by measurement of the transformer, which according to the calculated parameters was made by company of ELEKTROKOV, Inc.
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Influence of metal objects on measured electromagnetical field intensity of ERS generator
Major, Jan ; Dřínovský, Jiří (referee) ; Vídenka, Rostislav (advisor)
The bachelor’s thesis treats influence of metal objects on measured electromagnetical field intensity. There are shown simulation possibilities of propagation and reflection of electromagnetic waves from reflector or ground plane in program Matlab and Comsol Multiphysic in this project. Measurement of the impact of the metal reflecting surfaces at pre-compliance EMC measurement on the open area test site with the ERS and the CNE generator are shown in this text. The main task of this bachelor’s thesis is the verification of theoretical basics and computer simulations by practical experiments.
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The influence of status epilepticus (SE) in postnatal development early phase on laboratory rat psychomotor development
Boťchová, Lenka ; Kubová, Hana (advisor) ; Mareš, Pavel (referee)
Bibliografická identifikace v angličtině Author's first name and surname: Lenka Boťchová, BA Title of the master thesis: Does status epilepticus during early postnatal period influence laboratory rat psychomotor development? Department: Department of Rehabilitation and Exercise Medicine Supervisor: doc. PharmDr. H. Kubová, DrSc. The year of presentation: 2013 Abstract: The purpose of this study is to evaluate the influence of status epilepticus (SE) in postnatal development early phase on laboratory rat psychomotor development. Experimentally caused (SE) is the most common mode of epileptogenesis, which is the process leading to the epilepsy creation, and typical comorbidities. The influence of the early SE was studied when using lithium/pilocarpine model of SE induced on 12 days old rat cubs, which were repeatedly exposed to the "open field" test until 32nd day of their lives that means until the puberty beginning. The evaluation is focused on cognition and overall locomotion changes and anxiety demonstrations. The results show that in short periods after SE (up to 1 month) the cognitive functions regarding the habituation disorder are not worsened. However, hyperactivity short-term disposition and worse adaptability to experimental conditions due to animal anxiety increase were detected. Motor skills of...
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Behavioural patterns exhibited by three populations of house mouse ( Mus musculus lato) in five-tests battery: the effects of subspecies and commensal way of life
Voráčková, Petra ; Frynta, Daniel (advisor) ; Macholán, Miloš (referee)
The term "personality" nowadays occurs more often not only in psychological studies of humans but also in animal studies. Studying of personality help us to define the behavioural characteristics which can vary within the age, sexes, species or enviroments. Behavioral experiments are used to detect these behavioral patterns and they can divide the animals into the different groups. The subject of our research became three populations of house mouse (Mus musculus sensu lato) which we tested in a series of experiments involving free exploration, forced exploration, hole- board test, test of vertical activity and Elevated plus-maze. These experiments should reveal wheter the mice differ in their behaviour through the context of sex, comensalism or subspecies. We found (with in excepcion of one test) that intrapopulation variability differences are very small but interpopulation differences purely increase in the cas of comensalism and effects of subspecies. Keywords: Mus musculus, comensalism, open fieldtest, Elevated plus-maze, Principal Component Analysis (PCA)
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Remixing OSM maps using recurrent neural networks
Sedlák, Filip ; Kratochvíl, Miroslav (advisor) ; Kruliš, Martin (referee)
Generation of random realistic maps is a highly desirable content creation method for entertainment industry. Neural networks provide powerful com- putational capabilities proven useful in many fields. This thesis describes an algorithm that adapts real-world data to train Recurrent Neural Networks (RNNs) inspired by the pixel RNNs. An algorithm is constructed to gener- ate a map of altitudes, roads, rivers and buildings. The results are tested and evaluated on multiple selected real-world regions. It shows the ability of RNNs to learn and create random realistic maps. Algorithm generates real- istic altitude maps reflecting user input and training dataset. The creation of roads and rivers was met with weaker results. The creation of buildings was met with unsatisfactory results. 1
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Remixing OSM maps using recurrent neural networks
Sedlák, Filip ; Kratochvíl, Miroslav (advisor) ; Kruliš, Martin (referee)
Generation of random realistic maps is a highly desirable content creation method for entertainment industry. Neural networks provide powerful com- putational capabilities proven useful in many fields. This thesis describes an algorithm that adapts real-world data to train Recurrent Neural Networks (RNNs) inspired by the pixel RNNs. An algorithm is constructed to gener- ate a map of altitudes, roads, rivers and buildings. The results are tested and evaluated on multiple selected real-world regions. It shows the ability of RNNs to learn and create random realistic maps. Algorithm generates real- istic altitude maps reflecting user input and training dataset. The creation of roads and rivers was met with weaker results. The creation of buildings was met with unsatisfactory results. 1
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A Verified Knowledge Source and Wikipedia
Rožek, Štěpán ; Dvořák, Jan (advisor) ; Sedláček, Jakub (referee)
The main subject and aim of this master thesis is the development and practical testing of a collaboration schema between Czech Encyclopedia of Sociology (Sociologická encyklopedie) and the Czech Wikipedia and its sociology-related content. The collaboration between these two information resources is based on the idea that the Encyclopedia of Sociology can serve as a quality resource for writing and editing Wikipedia and vice versa, Wikipedia can potentially increase Encyclopedia of Sociology's visibility and findability. The theoretical part of the thesis presents information about academic knowledge resources and open collaboration knowledge resources. Last but not least the theoretical part contains information about current practices of collaboration between Academia and Wikipedia. The research part of the thesis presents the development of the collaboration schema and its testing. Methods of semi-structured interviews and field experiment are used within this research. In the first part, one conducts interviews with Czech sociology experts and Wikipedians who are active in the field of sociology or related social sciences. The second part of the research then uses a field experiment to verify to some extent the information from the interviews and to induce reaction from the Wikipedian...
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Simulations of open-ended evolution
Prax, Sebastian ; Toman, Jan (advisor) ; Tureček, Petr (referee)
Evolutionary algorithms are used to solve a number of optimization problems in the computer science. At the same time, they are fundamental pillar for creating evolutionary simulations and testing scientific hypotheses in a various areas of theoretical biology. In the first half of my work, I characterize the concept of "open-ended evolution", focus on its connection with the technical side of simulations and introduce readers to the problematics of system simulation. Further on, I deal with the phenomenon of increasing complexity and the idea of "evolutionary progress". All these topics are confronted with various perspectives of researchers in the field of evolutionary biology. In the second half, I summarize the benefits of existing projects for evolutionary biology and applied informatics, as well as the ways in which the simulations of open-ended evolution can be approached. Basically, these projects can be divided into two categories. They are either projects in which individuals develop towards a predefined goal, which is conditioned by a fitness function, or projects of researchers who seek to achieve an open-ended evolution by employing biologically realistic design of the genetic code and environment in conjunction with the absence of a particular attractor in the evolution of virtual...
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Explorační chování samic dvou poddruhů myši domácí (\kur{M. m. musculus} a \kur{M. m. domesticus})
DOSOUDILOVÁ, Jana
In this study we employed a standard open-field test as an approximation of the first phase of dispersal, using females from wild-derived inbred strains representing two subspecies of the house mouse, M. m. musculus and M. m. domesticus. We tested the prediction that exploration of neutral area varies during different phases of the oestrus cycle and is different between the two subspecies. We also compared female's behaviour with male exploration tested in the same conditions.
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Assortative mating in Endler's Livebearer
SCHAFFELHOFEROVÁ, Dana
The thesis deals with assortative behaviour of Poecilia wingei. The aims of the thesis are to describe character traits of fish and their heritability, then set breeding pairs of Endler's Livebearer (Poecilia wingei) and to determine their traits (shy or bold). After that, the offspring generation of such pairs was bred and their personal traits were determined too. Finally a comparison of the parents and the offspring generation was carried out and the heritability was analyzed. The traits were analyzed using the Open Field test. Fifty pairs of the parent generation were measured, coupled into pairs according to their traits. After that the offspring generation was measured too. The intraclass correlation coefficient was calculated, determining the share of the total phenotypic variance that is conditioned by the variability of genetic information in the population. The results were analysed using Statistica 12. The comparisons of the results revealed the heritability of the traits.
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