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Comparison of open source database systems
Véle, Marek ; Palovská, Helena (advisor) ; Klas, Jan (referee)
Goal of this paper was to compare chosen open source database management systems from theoretical and practical point and assess their suitable use. For this comparison I chose MySQL, PostgreSQL and MonetDB database systems. Theoretical comparison involved licenses covering the systems, available support, supported platforms, usable interfaces and data types. In practical comparison I conducted basic installation and configuration in real environment and tested performance of execution of certain SQL queries. One of the aspects of performance testing was to determine the influence of data storing architecture on speed of execution of specific types of queries. Documentation available with the compared systems and official web pages of particular systems served as the main source for theoretical comparison. I conducted the practical part using the linux platform. To access the systems and for the SQL queries input I used the standard JDBC interface. As data for testing I used random data from Open Source Database Benchmark, which I ordered into two similar tables. I defined the test queries myself in order to compare the performance of database systems in whole and in particular fields. I've reached a conclusion that MySQL is suitable for corporate and stand-alone users thanks to wide support, choice of licenses and diversified spectrum of available interfaces and supported platforms. However, its performance in many fields including index creation and ordering of data was very poor in tested configuration. PostgreSQL can indeed discourage mostly corporate users by worse choice of commercial support and interfaces shipped with the system, but these problems are mostly compensated by active community, or third parties. The performance of PostgreSQL was outstanding, I find it suitable for larger data collections and it's fast even in cases when indexing of data didn't take place. MonetDB, as a not well-known while academically developed system, has little chance for a breakthrough outside its field of origin. Its column oriented storage of data proved convenient when selecting very small number of columns. Even without any indexation all test queries were executed with good speed. Individual chapters of the theoretical part are divided based on the compared systems. The practical part only consists of one chapter divided according to order of actions. At the end of each chapter there is evaluation of discovered facts.
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Formation of the Security Policy Of Danish Kingdom in the 20.th Century
Sedláková, Barbara ; Fidler, Jiří (advisor) ; Karásek, Tomáš (referee)
This thesis is concerned with Danish foreign and security policy in the 20th century. In the Middle Ages Denmark was a major Scandinavian power but after a series of territorial losses it became a relatively small country. Due to this development, it started to pursue the policy of neutrality as the means of ensuring its security. The policy proved to be a successful strategy until World War I, yet utterly failed during World War II. The War became a turning point in Danish security policy, because Denmark abstained from neutrality from 1945 on and changed the way of enforcing its security and its understanding dramatically. The policy of neutrality was based on the assumption that if Denmark had not been perceived as a threat, it would not have been attacked. However, such perception of security was applicable only during the period of multipolarity. The outcome of World War II led to the shift from polarity to bipolarity, as represented by two superpowers. In the new situation the policy of neutrality couldn't have ensured Denmark's security, considering the geo-strategic position of the country. As a result, Denmark had to choose one side in the superpower rivalry. Thus it chose the United States and entered the organization of collective defence (the North Atlantic Treaty Organisation), established by...
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Daily test of the AXIS scintigraphic camera quality in the Nuclear Medicine Department in Pribram as an indicator of the apparatus stability for the last 5 years
HEFKA, Pavel
Daily test of the AXIS scintigraphic camera quality in the Nuclear Medicine Department in Pribram as an indicator of the apparatus stability for the last 5 years This Thesis is devoted to the choice of the most suitable routine check of the AXIS scintigraphic camera in the Nuclear Medicine Department in Pribram. In my Thesis I focused on the analysis of the recommended procedures and choice of the method, which during the routine operation of nuclear medicine will sufficiently prove the quality of the preparation of the apparatus for the examination and is not very time-consuming. The result of such an optimization analysis is the check procedure of the internal image homogeneity, which fully respects SÚJB recommendations and procedures recommended by the producer of the AXIS scintigraphic camera. Performance of the chosen method is described in detail and the method of the recording, acquisition and evaluation of the acquired data is presented. Checking of the AXIS apparatus in the described way has been performed in the Nuclear Medicine Department in Pribram for a long time. It enabled me to make an analysis of the long-term stability of the apparatus for the last 5 years. Acquired results have been compared with information given by the producer and results of the similar device in the Czech Republic. For clarity purposes the presentation of the recorded data and acquired results is arranged in tables and graphs. Collected data confirmed that the homogeneity values measured by means of the point source correspond well to the data stated for this apparatus by the producer. This has also confirmed my hypothesis on the correct choice of the method for testing the homogeneity by means of the point source. Therefore it is possible to state that the AXIS gamma camera with the supplement for the detection of positron emitters is stable and it is possible to apply it in the routine clinical operation even after 10 years of use provided that the good service care is ensured.
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Mentally-Retarded Children of a Pre-School Age and the Development of Movement Skills
Morávková, Šárka ; Strnadová, Iva (advisor) ; Černá, Marie (referee)
The diploma work covers the issues of children with mental retardation in pre-school age aimed to the development of the movement abilities. It focuses on the relationships between the pre-school child with mental retardation and possibilities of developing its motor skills in context of an organized pre-school education. Theoretical part of the Diploma work indicates the development specifics of the indi- vidual due to mental retardation, describes mainly the movement development of the child with mental retardation, its specifics and possibilities of observation. It addresses the history and current stage of an organized pre-school care of children with mental re- tardation and within the issue, it points out the position of physical training / education within the educational process of the Kindergarten. Practical part proves on cases of children with mental retardation the uniqueness and typicality of development of such children. By the proposed possible motion activities and games for children with mental retardation attending Kindergarten, its aim is to em- phasize on the importance and ineligibility of intentional development of motor skills, and by that also of the whole personality of the child with mental retardation. KEY WORDS mental retardation, definition of mental retardation, pre-school...
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No pain, no gain. A study in narratives of suffering. Kaye Gibbons's Ellen Foster & Lauren Slater's Lying
Libovická, Barbora ; Ulmanová, Hana (advisor) ; Roraback, Erik Sherman (referee)
"The experience of suffering both provokes and resists narration. It is at the hearl of many of the world's great stories (the Odyssey, the Book of Job, the Gospels, the Divine Comedy, Paradise Lost) and yet absent, in a fundamental way, from every story. Because intense suffering takes language away, retrospective narration can seem futile, even falsifying. Moreover, it often raises more questions than it answers. (Who or what is responsible for suffering? Is it merited? What ends it? How can it be made commensurable with the rest of ones's life? What is its meaning? How does one cope with it?) In spite of all this, sufferers continue to tug at the shirls/eeves of passersby, and passersby continue to stop, listen and fall into the sufferers's story. Why?" My opening paragraph is a description of a course that I discovered in the Bard College Course Catalogue for the fall semester 2001 - the year of the falling towers. I was immediately intrigued by the description, having myself experienced great loss, and suffering from it again despite a long passage of time and coping. The course was called Narratives of Suffering, drew on literature from the American literary canon, and proved to be very enriching and inspiring. Starting chronologically with short stories of captivity and shipwreck narratives, we later...
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Consequences of assumption violations of selected statistical methods
Marcinko, Tomáš ; Blatná, Dagmar (advisor) ; Malá, Ivana (referee) ; Lukáš, Ladislav (referee)
Classical parametric methods of statistical inference and hypothesis testing are derived under fundamental theoretical assumptions, which may or may not be met in real world applications. However, these methods are usually used despite the violation of their underlying assumptions, while it is argued, that these methods are quite insensitive to the violation of relevant assumptions. Moreover, alternative nonparametric or rank tests are often overlooked, mostly because these methods may be deemed to be less powerful then parametric methods. The aim of the dissertation is therefore a description of the consequences of assumption violations concerning classical one-sample and two-sample statistical methods and a consistent and comprehensive comparison of parametric, nonparametric and robust statistical techniques, which is based on extensive simulation study and focused mostly on a normality and heteroscedasticity assumption violation. The results of the simulation study confirmed that the classical parametric methods are relatively robust, with some reservations in case of outlying observations, when traditional methods may fail. On the other hand, the empirical study clearly proved that the classical parametric methods are losing their optimal properties, when the underlying assumptions are violated. For example, in many cases of non-normality the appropriate nonparametric and rank-based methods are more powerful, and therefore a statement, that these methods are unproductive due to their lack of power may be considered a crucial mistake. However, the choice of the most appropriate distribution-free method generally depends on the particular form of the underlying distribution.
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Actor partnership on stage and in front of the camera
Koudela, Jakub ; SCHEJBAL, Milan (advisor) ; PAVELKA, Tomáš (referee)
The subject of the thesis is exploration of actors’ interplay both on the stage and in front of a camera, because only common acting of the main characters creates a dramatic situation. In connection with this topic, at first I determine elementary characteristics of the actors’ partnership with all its important objectives that the actor should notice. I am trying to see acting as a social activity and further write about the contact between the actor and auditorium and the actors themselves. Then I relate actors’ partnership to other acting practice and thus prove its presence in the whole art of acting. In the conclusion I deal with negative influence of actors’ interplay due to blocking the actor’s creativity and I look for means of removing those blocks. In terms of these topics I enclose my personal experience as a proof of my theoretical reasoning.
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Yellow rust protection on the wheat
Hanzalová, Alena ; Bartoš, Pavel
Heavy incidence of yellow rust in the years 2014 and 2015 has proved high deleterious effects of this rust. For this reason this publication deals with yellow rust on wheat. Rusts on wheat cause losses every year. In the years of an epidemic yield can be decreased by more than a half. Epidemics of stem rust and yellow rust occur in irregular intervals. Leaf rust causes damage every year particularly in central and southern part of Moravia. Chemical control limits yield losses, however in the case of heavy rust incidence this control particularly on susceptible cultivars is not sufficient. Repeated chemical treatments increase the costs and are limited by phytosanitary regulations. Economic and ecologic rust control consists in resistance breeding and growing resistant cultivars. Knowledge of virulence in the rust poppulation and suitable sources of resistance are prerequisites for successful resistance breeding. This publication presents a summary of data from literature on the yellow rust on wheat. Data on resistance of the grown cultivars and possibilities of the chemical control are included.
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Credit Constraints and Creditless Recoveries: An Unsteady State Approach
Derviz, Alexis
The paper investigates the behavior of credit demand and output arising from differences in productive capital sources in economies recovering from an adverse real shock. Beside physical capital, another form of capital – human capital – is available during the catch-up phase. Since a part of new physical capital must be debt-financed, whereas production is risky due to uncertain future total factor productivity, defaults happen with positive probability. The latter can be reduced by partially substituting physical capital for human, at a disutility cost. We ask whether a shift away from risky borrowed physical capital to human capital is able to generate a reduction in aggregate credit losses without too big a loss in output, thereby warranting a specific prudential policy. This question is addressed by means of a dynamic stochastic model with feedback decision rules, for which we develop a full-distribution numerical solution method. The long-term stationary limit distribution of the solution generalizes the steady state notion of deterministic models. Agents that start from relatively “poor” initial states are found to benefit from limits on unsecured borrowing at a very moderate cost in output terms, whereas for “rich” initial states, such limits prove to be largely redundant.
Fulltext: PDF
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Business Plan: Beauty studio
Svobodová, Martina ; Lešetický, Ondřej (advisor) ; Dvořák, Jiří (referee)
The aim of the thesis is to prove whether is this business plan a feasible project or not. Based on the conclusion the entrepreneur will decide to go for the realization or not. The subject of the thesis is a beauty studio with already certain amount of current clients however still with substantial space for improvement. To reach better profitability there are calculations, analysis and set up of a new strategy carried out.
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