|
Imaging the local density of electronic states by very low energy electron reflectivity
Pokorná, Zuzana ; Frank, Luděk
This work was concerned with the relationship between the reflectivity of very low energy electrons from a crystalline sample and its density of electron states above the vacuum level. Also, as different crystallographic orientations of the same single crystal exhibit different density of states, the usefulness of electron reflectivity at very low energies was demonstrated for the determination of crystallographic orientation. The technique chosen was the Scanning Low Energy Electron Microscopy (SLEEM) wich allows using arbitrarily low electron energies while preserving a very good image resolution. In our experiments, the incident electron energy ranged between 0 and 45 eV.
|
|
Proměnlivost multiplikátorů vládních výdajů v čase: Evidence z dat z USA
Focht, Daniel ; Maršál, Aleš (advisor) ; Chytilová, Helena (referee)
This paper estimates the size of the government spending multiplier over different states of the economy. Previous research came with two contradictory conclusions. Part of the literature argues that the spending multiplier is larger during recession and zero-lower bound periods, while the second one concludes that it remains constant. First, a summary of the relevant literature is presented, outlining different types of used methodological approaches and estimated size of the multiplier. We build a model estimated using local projections by Jorda for the period 1889 to 2016 to estimate government spending multipliers over different states of the economy. Our results show that the spending multiplier remains constant over different states of the economy.
|
|
Decision making of Prague moviegoers
Macháček, Ivan ; Hanzlík, Jan (advisor) ; Zelený, Martin (referee)
The aim of this work is to analyze attitudes of Prague film viewers towards watching films at the cinema and at home and to find out on what factors do they base their decision to watch a particular film. The means to achieve this goal are research of existing literature related to this subject and my own research through a questionnaire survey on a sample population of Prague with a corresponding demographic composition. The most crucial conclusions from this investigation are related to the frequency of watching movies in the cinema and at home, attitudes towards the origin and localization of movies, attitudes towards various genres, factors influencing the choice of a film and comparing the results of various demographic groups (by gender, age and education) within these topics.
|
|
Initial Stage of Mutual Diffusion of Carbide in Iron
Čermák, Jiří ; Král, Lubomír
Initial stage of mutual diffusion close to carbon/iron interface was investigated in the present work. SIMS technique of concentration profiles enabled to study the carbon redistribution in the very early stages, when the diffusion process occurs – at least partly – in regions, where the carbon concentration exceeds the carbon concentration limit. It was observed that carbon diffusion coefficients are much lower under such conditions, than in Fe matrix with equilibrium carbon concentration. The measured carbon diffusion coefficients approached values reported for carbon diffusion in carbides.
|
|
PRINCIPLES OF NURSING CARE OF THE CHILD WITH ACUTA RENAL FAILURE
HOLUBCOVÁ, Eliška
The thesis principles of nursing care for a child with renal failure is engaged in nursing activities in nephrology and cardiology intensive care unit of a hospital in Prague - Motol. Acute renal failure is defined as a condition where there is a sudden , usually reversible renal impairment, which were totally wrong , or very little damage. Besides the medical approach to this disease in acute renal failure urgently needed highly skilled nursing care. When nursing care for sick children teamwork is essential . A child with acute renal failure , always requires hospitalization in intensive care.The thesis is divided into a theoretical and an empirical part . In the theoretical part , attention is paid to the current issue of treating a child with acute renal failure. The work also includes anatomy and physiology of the kidney , and nephrologic basic concepts. Attention is also pays attention to the methods of investigation , communication with patients and nursing diagnoses . There acquaintance with elimination methods and nursing care for the child , unless they use the elimination method .
|
|
Modelling, parameter estimation, optimisation and control of transport and reaction processes in bioreactors.
ŠTUMBAUER, Václav
With the significant potential of microalgae as a major biofuel source of the future, a considerable scientific attention is attracted towards the field of biotechnology and bioprocess engineering. Nevertheless the current photobioreactor (PBR) design methods are still too empirical. With this work I would like to promote the idea of designing a production system, such as a PBR, completely \emph{in silico}, thus allowing for the in silico optimization and optimal control determination. The thesis deals with the PBR modeling and simulation. It addresses two crucial issues in the current state-of-the-art PBR modeling. The first issue relevant to the deficiency of the currently available models - the incorrect or insufficient treatment of either the transport process modeling, the reaction modeling or the coupling between these two models. A correct treatment of both the transport and the reaction phenomena is proposed in the thesis - in the form of a unified modeling framework consisting of three interconnected parts - (i) the state system, (ii) the fluid-dynamic model and (iii) optimal control determination. The proposed model structure allows prediction of the PBR performance with respect to the modelled PBR size, geometry, operating conditions or a particular microalgae strain. The proposed unified modeling approach is applied to the case of the Couette-Taylor photobioreactor (CTBR) where it is used for the optimal control solution. The PBR represents a complex multiscale problem and especially in the case of the production scale systems, the associated computational costs are paramount. This is the second crucial issue addressed in the thesis. With respect to the computational complexity, the fluid dynamics simulation is the most costly part of the PBR simulation. To model the fluid flow with the classical CFD (Computational Fluid Dynamics) methods inside a production scale PBR leads to an enormous grid size. This usually requires a parallel implementation of the solver but in the parallelization of the classical methods lies another relevant issue - that of the amount of data the individual nodes must interchange with each other. The thesis addresses the performance relevant issues by proposing and evaluation alternative approaches to the fluid flow simulation. These approaches are more suitable to the parallel implementation than the classical methods because of their rather local character in comparison to the classical methods - namely the Lattice Boltzmann Method (LBM) for fluid flow, which is the primary focus of the thesis in this regard and alternatively also the discrete random walk based method (DRW). As the outcome of the thesis I have developed and validated a new Lagrangian general modeling approach to the transport and reaction processes in PBR - a framework based on the Lattice Boltzmann method (LBM) and the model of the Photosynthetic Factory (PSF) that models correctly the transport and reaction processes and their coupling. Further I have implemented a software prototype based on the proposed modeling approach and validated this prototype on the case of the Coutte-Taylor PBR. I have also demonstrated that the modeling approach has a significant potential from the computational costs point of view by implementing and validating the software prototype on the parallel architecture of CUDA (Compute Unified Device Architecture). The current parallel implementation is approximately 20 times faster than the unparallized one and decreases thus significantly the iteration cycle of the PBR design process.
|
|
Cultural support in Prague's districts
Mokrá, Jolana ; KAŠPAR, David (advisor) ; PROKOP, Petr (referee)
Diploma thesis ”Cultural support in Prague's districts” focuses on a current situation in municipal strategical management and support of culture in all Prague districts. The introduction emphasises the importance of each level of government in the management and support of culture through comparing specific cultural policies. The research is divided into two parts. First one depicts how culture is being understood on the municipal level and presents an overview of existing instruments for support and planning. The second part is focused on a few municipal districts that handle their culture policy with a particular strategy and consider it to be an irreplaceable part of a local development. The second part also examines what tactics and tools these municipal districts use for a realization of their strategic goals. In conclusion, this thesis proves why the role of the local official government is so important in the developement and implementation of culture.
|
|
Political aspects of local goverment. Elections and electoral behavior of citizens in the town of Nový Bydžov
Bieliková, Eva ; Kopřiva, Radek (advisor) ; Lenka, Lenka (referee)
The thesis addresses the issue of elections and electoral behavior of citizens in the town of Nový Bydžov. It is focused on assessment of factors that influence voting behavior of citizens in the town of Nový Bydžov. It describes the evolution of electoral behavior from 1994 to 2014 and verification of the applicability of the theory of electoral behavior for explanation of the electoral decision-making of the electorate in Nový Bydžov. The theoretical part addresses (describes) theoretical definition of areas that relate to the topic of the thesis. The practical part is a case study of Nový Bydžov. Subject of study is the town of Nový Bydžov, objects of study are the voters participating in the elections to the council of this city. To achieve the set goals (objectives) is recovered content of documents study (written records), a questionnaire survey, comparative methods and synthesis.
|
|
Influence of meadow management on the migration behavior of selected species of butterflies
Bubová, Terezie ; Langrová, Iva (advisor) ; Farkač, Jan (referee)
Migrations are the key process and one of the basic biological features, which allow survival of endangered species in fragmented landscape. In the last decades, agriculture intensification, industry and urbanization caused that number of natural butterfly habitats has significantly decreased. The localities originally suitable for butterflies are currnetly converted to farmland or building plots. This PhD thesis aimed to find a compromise solution of meadow management, which should allow a commercial use and concurrently do not jeopardize the continued existence of endangered or threatened species. The main idea of this study was in the intentional emigration causing in the middle of flight period, which should lead into resettlement of the population to another (potentially more suitable) locality. Possibility of aimed manipulation with butterfly emigrations would be considered as a major breakthrough in their protection.
The investigated species Phengaris nausithous (Bergsträsser, 1779) and Phengaris teleius (Bergsträsser, 1779) are both considered to be flagship species for protection of European butterflies at open meadows. This study is based on research, which was carried out in 2013-2015 at 17 patch in localities Dolní Labe, Czech Republic. In above mentioned years, one selected meadow was mowed in the middle of flight season and the emigrations were then monitored using mark-release-recapture method. Results of population and migration characteristics were calculated in MARK 8.1 software. Subsequently, the effect of mowing on emigration (comparison of emigrations from the meadow before and after mowing) was evaluated using Statistica 13.
The hypotheses of this study were based on the assumption, that the loss of resources after well-timed mowing should increase the activity of adult butterflies. During the monitoring, number of emigrations was increased only in flight season 2015. Unfortunately, the statistical evaluation did not show significant effect of mowing on migrations. On the other hand, the hypothesis dealing with colonization of nearest meadows was confirmed.
Effect of intentional emigration caused by management interventions was unfortunately not proved. However, we found out, that even though the population at one mowed meadow decreased clearly, the metapopulation size at the locality remained more or less stable.
At investigated (mowed) meadow, there was observed a sharp decline of P. nausithous abundance. On the other hand, P. teleius population was only slightly reduced. It is therefore conceivable, that P. teleius are not as susceptible to innapropriate term of mowing. The results obtained in our research conclusively displayed no possible positive effect of mowing in the middle of flight season and a necessity of suitable management maintenance at localities inhabited by Phengaris butterflies.
|
|
Impact of the European Cohesion Policy in Central Bohemia Region
Lálová, Gabriela ; Tomšík, Karel (advisor) ; Miroslava, Miroslava (referee)
This thesis evaluates the impact of European Cohesion Policy in Central Bohemia Region with focus on Podlipansko region. The thesis is focused on activities of the Local Action Group Podlipansko in the programming period 2007 - 2013.
The theoretical part deals with the regional policy of the European Union, including the financial instruments of regional policy and the principles of regional policy. Following section is dedicated to the development of cohesion policy in the Czech Republic
and cohesion regions.
At the beginning of the practical part of the thesis, Central Bohemia Region and the activities of the local action groups are described. Next section is dedicated to the activities of the Local Action Group Podlipansko in Podlipansko region. Activities of the Local Action Group Podipansko are evaluated through the monitoring indicator analysis.
The results of public inquiry among residents of the region are addressed as well.
The closing part assesses if the activities of the Local Action Groups are beneficial for the development of rural areas.
|
guest ::
