|
The role of species traits in predator-prey interactions and food web structure
KLEČKA, Jan
This thesis deals with the role of species traits in predator-prey interactions and food web structure. I conducted laboratory experiments with predatory aquatic insects and their prey to reveal the traits determining who eats whom in small standing waters. I also focused on the possibility of incorporating the observed dependence of predator-prey interactions on body mass into existing food web models. Further, I developed a simple simulation model to explore the consequences of body mass dependent feeding and dispersal for food web assembly. Last, I show that four common methods for sampling aquatic insects differ in their selectivity, especially on the basis of body mass of sampled insects. In conclusion, I combined laboratory experiments, field work and mathematical models to evaluate the importance of body mass and other species traits, such as foraging behaviour and microhabitat selectivity, in predator-prey interactions and explored selected food web level consequences.
|
|
The analysis of price elasticity of demand for beer
Hromadníková, Kateřina ; Mirvald, Michal (advisor) ; Babin, Jan (referee)
The thesis analyses price elasticity of beer demand. Hypothesis about inelastic demand is tested first for nationwide level and then on data of specific brewery. Elasticity was determined by regression analysis, specifically by ordinary least squares with all variables expressed in logarithmic form. Consumption of beer is the endogenous variable and price of bottled beer (price of one hectoliter of beer in case of brewery), average gross income and price level are in the role of the exogenous variables. The hypothesis about inelastic demand was successfully proved. Price elasticity estimates range from -0,66 to -0,2. In case of specific brewery price was not significant. On the other hand, average gross income seems to be the significant determinant. According to income elasticity beer seems to be luxury good in case of specific brewery and necessity in case of nationwide level.
|
|
Design of methodology of administration and management of issues and its application in chosen organisation
Holub, Adam ; Stanovská, Iva (advisor) ; Novák, Tomáš (referee)
This thesis is focused on design methodology of administration and management of issues, using issue-tracking system. The objective is to create such methodology and deploy it to specific organization. During methodology creation, there were used best practices, acquired from source thesis and authors experiences. In theoretical part of thesis are described approaches, witch is this thesis based on. Then thesis describes what issue-tracking system is and lists mostly used issue-tracking systems. In practical part, the methodology itself is created. At first, target group is described. Then, types of issuse and roles used in issue-tracking system are described. Then is described, how to create lifecycle of issue and how to handle with its attributes. Last part is focused on data reporting from issue-tracking system. Last chapter of practical part describes how to implement methodology to issue-tracking system JIRA.
|
|
Internal Migration in PRC: function, role and impact on Chinese economy
Čermáková, Zuzana ; Stuchlíková, Zuzana (advisor) ; Procházková Ilinitchi, Cristina (referee)
The purpose of this thesis is to analyze the process of internal migration in Peoples' Republic of China. It focuses on low-skilled rural migrant workers, their overall characteristics, role in the economy and their status within Chinese society. This analysis aims to prove that despite the fact that rural migrants represent an essential element of Chinese economy, and have contributed by a great deal to China's economic take-off, they are still a very discriminated group of Chinese society and are constantly facing violations of their rights.
|
|
The influence of selected ECJ judgements on the forming of common commercial policy of EU
Vicherek, Ondřej ; Bič, Josef (advisor) ; Procházková Ilinitchi, Cristina (referee)
The goal of my diploma thesis is to describe the influence of ECJ decision making on the common commercial policy ("CCP") of EU. Specifically my thesis examines what factors influence ECJ decision making about direct effect of trade agreements implementing CCP. These factors are applied on several treaties, where the court has not yet decided on their potential direct effect and on a present case at ECJ on direct effect of WTO treaties. With regard to the goal of my thesis an important part of my thesis deals with the development of ECJ decision making. Methods applied in my thesis are analysis and comparison of selected judgements that influence the CCP of EU. After proper analysis I found out that the main motiv behind ECJ decision making is that, if the negotiating position of EU is to be deteriorated, the ECJ is likely to find that the treaty does not have direct effect. Other factors are of secondary character. Examining the influence of decision making of ECJ on direct effect of trade agreements is important, because the role of ECJ influences the legal certainty of subjects about direct applicability of international trade treaties.
|
|
Makroekonomický dopad mateřské (a rodičovské) dovolené ve srovnání České Republiky s Brazílií
Kalkusová, Marie ; De Castro, Tereza (advisor) ; Neumann, Pavel (referee)
This thesis aims to estimate the macroeconomic impact of maternity and parental/paternal leave in the Czech Republic and Brazil. In addition, the thesis stresses out the costs of Czech model application to Brazil and vice-versa. The first chapter brings a theoretical framework. It compares the analyzed policies in both countries and introduces the relevant terms. The second chapter estimates the costs of maternity and parental/paternal leave related to public expenditure and GDP for the years 2005-2014 and brings own simulation model for Czech model application to Brazil and vice-versa. The third chapter analyses the inefficiencies and suggest possible mitigation. The results show the costs of 0.71% of GDP and 1.66% of public expenditure in the Czech Republic and 0.50% GDP and 2.27% of public expenditure in Brazil in 2014. The Czech model applied in Brazil would be very costly and the opposite scenario would lead to the decrease of macroeconomic burden in the Czech Republic. The thesis also analyzes the influence of maternal and parental leave in other areas, such as labor market, where the current structure may penalize Czech women in long term. By this analysis, the thesis contributes to the current debate about the impact, the length and costs of maternity and parental leave.
|
|
Serverless single page application in JavaScript
Zikmund, Marian ; Pecinovský, Rudolf (advisor) ; Suchan, Vladimír (referee)
The goal of this thesis is to design and develop a framework for building modern single- page application in the JavaScript programming language and describe this approach to development. The work also contains the documentation for a more comfortable use and customization. The content is divided into eight chapters. The introduction is followed by the retrieval of information resources, including the specifics of the JavaScript programming language and explanation of the formation of single-page application. The description of the basic principles of their functioning, motivation and justification, when and why this approach is appropriate is also included. The work is primarily focused on the issue of single-page application, for which the use of the JavaScript programming language is crucial. For this reason, this work provides a whole chapter about this programming language, also including a description of its history and role in the context of others. Below are the common characteristics of single-page applications frameworks, built on top of the library ReactJS, whose formation is engaged in the following chapter. The developed framework also contains the user guide. The practical outcome of this work is an open source framework for creating serverless single-page applications, which is due to its architecture and documentation appropriately adaptable.
|
|
Information systems security penetration testing
Klíma, Tomáš ; Doucek, Petr (advisor) ; Čermák, Igor (referee) ; Čapek, Jan (referee) ; Štubňa, Ivan (referee)
The aim of this dissertation thesis is to develop new methodology of information systems penetration testing based on analysis of current methodologies and the role of penetration tests in context of IS/IT governance. Integral part of this aim is evaluation of the methodology. The first part of the thesis is devoted to the presentation of history and current state of research in selected area, definiton of basic terms and introduction of role of the penetration tests. This part is followed by the review of relevant sources and comparative study of current methodologies with a goal to identify their weaknesses. Results from this study are further used as a basis for new methodology development. Classification of IS penetration tests types and testing scenarios are also included. The second part includes design of new methodology, at first its history, structure and principles are presented, then its framework is decribed in high level of detail. In the third part the reader can find (theoretical and practical) validation. The biggest scientific contribution is the methodology itself focused on managment of penetration tests (which is the area currently not sufficiently descibed). Secondary contribution is the extensive review and the comparative analysis of current methodologies. Contribution to the economic and technical (practical) application we can mainly see in the development of new methodology which enables companies to improve management of penetration tests (especially planning, operational management and implementation of countermeasures).
|
|
Míry podobnosti pro nominální data v hierarchickém shlukování
Šulc, Zdeněk ; Řezanková, Hana (advisor) ; Šimůnek, Milan (referee) ; Žambochová, Marta (referee)
This dissertation thesis deals with similarity measures for nominal data in hierarchical clustering, which can cope with variables with more than two categories, and which aspire to replace the simple matching approach standardly used in this area. These similarity measures take into account additional characteristics of a dataset, such as frequency distribution of categories or number of categories of a given variable. The thesis recognizes three main aims. The first one is an examination and clustering performance evaluation of selected similarity measures for nominal data in hierarchical clustering of objects and variables. To achieve this goal, four experiments dealing both with the object and variable clustering were performed. They examine the clustering quality of the examined similarity measures for nominal data in comparison with the commonly used similarity measures using a binary transformation, and moreover, with several alternative methods for nominal data clustering. The comparison and evaluation are performed on real and generated datasets. Outputs of these experiments lead to knowledge, which similarity measures can generally be used, which ones perform well in a particular situation, and which ones are not recommended to use for an object or variable clustering. The second aim is to propose a theory-based similarity measure, evaluate its properties, and compare it with the other examined similarity measures. Based on this aim, two novel similarity measures, Variable Entropy and Variable Mutability are proposed; especially, the former one performs very well in datasets with a lower number of variables. The third aim of this thesis is to provide a convenient software implementation based on the examined similarity measures for nominal data, which covers the whole clustering process from a computation of a proximity matrix to evaluation of resulting clusters. This goal was also achieved by creating the nomclust package for the software R, which covers this issue, and which is freely available.
|
|
Speculation on oil markets and its impact on commodity's price
Melcher, Ota ; Taušer, Josef (advisor) ; Baláž, Peter (referee) ; Müller, Štěpán (referee)
This study aims to analyse the precrisis period on the oil markets with a primary objective of assessing the role of speculation in the commodity's price development and its volatility. First it depicts the rapidly increasing speculative activity on the futures market together with the parallel oil price surge. The speculation is initially proxied by non-commercial traders' positions and subsequently quantified by Working's T-index. The paper then uses speculative traders' positions and both spot and futures prices to test for Granger causality within the framework of VAR models. For the sake of consistency it also evaluates causal links between speculation and inventories level. Further the study investigates the speculation impact on volatility of oil prices by employing various approaches in volatility quantification including GARCH models. Contrary to expectations we find that the speculatio's impact on both prices and their volatility is rather insignificant. In the last chapter we therefore seek for an explanation of the oil price developments by examining the market fundamentals. The interaction of supply and demand finally gives substantial evidence for understanding the price developments in the precrisis period.
|
guest ::
