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Optimization of LAMP (linux/apache/mysql/php)
Lamoš, Igor ; Jošth, Radovan (referee) ; Herout, Adam (advisor)
The goal of this work is to summarize and verify the fundamental factors affecting performance of Linux operating system, Apache web server and performance of MySQL database system and PHP. This work contains important settings for each part of webserver with corresponding description. Where possible, there are perfomance tests made on the model application and the results are reviewed. Based on the tests results, the recommended settings list was assembled. Accuracy of this recommendations was verified by applying the settings to real-world applications. In both cases, there was performance improvement.
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The diverse system for heat transfer from the active zone
Lamoš, Pavel ; Suk, Ladislav (referee) ; Martinec, Jiří (advisor)
This bachelor’s thesis is focused on diverse system for heat transfer from the active zone of the nuclear power plant Temelín. This result is output of stress tests. These stress tests were resulted as a necessary output from the nuclear accident at Fukushima - Daiichi, in order to improve nuclear safety. The outcomes of stress tests of nuclear power plants in Czech Republic are mentioned in next section of the thesis. Part of the safety systems of nuclear power plant Temelín is described in the next section. Next section is focused on the diverse system. In the end of the thesis is final energy balance between a steam generator and an amount of coolant in case that the diverse system for heat transfer from the active zone would be used.
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Bank stress testing
Vorlíček, Jaroslav ; Blahová, Naděžda (advisor) ; Brada, Jaroslav (referee)
This thesis deals with stress testing of the banking sector. Stress tests are a set of analytical tools used to test the resilience and financial stability of the banking sector. At the beginning of the work financial stability and systemic risk impact not only in the form of sys-temically important financial institutions are discussed. Followed by a chapter on stress tests, which describes historic development of stress testing approaches to testing of individual banking risks and their implementation in the form of stress testing. Stress testing methodo-logy is described primarily from the perspective of the Czech National Bank, the importance of banking regulation and supervision in Basel III is also presented. In the final chapter of the thesis there are commented results of Czech National Bank's stress tests, and EU wide stress tests 2014, launched in cooperation with European Banking Authority, European Central Bank and the European Systemic Risk Board.
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Safety assessment of Temelin NPP
KOŠŤÁL, Jaroslav
History of peaceful use of nuclear energy, despite of all necessary emphasis on operation safety, is accompanied by a series of accidents, some of which left indelible trace in minds of wide public and so led to changes in the comprehension of nuclear safety and in the access to its preservation. Because the consequences of possible nuclear power plant accident have always serious social impacts, it is most desirable to define all possibly risks, to quantify probability of their formation and in this way to gain the possibility to prevent them effectively and efficiently. This work is dedicated to approve or to disapprove that the KARS method is practically applicable for evaluation of nuclear power station operation safety. The work objective is to evaluate events and risks associated with the operation of a particular nuclear facility by the KARS method and critically evaluate obtained results and the used method as such. The work is divided into theoretical and practical part. Theoretical part includes basic information necessary for correct understanding of the chosen data processing procedure and subsequent interpretation of the gained results. A brief overview of basic concepts relating to the nuclear safety, the safety culture and the emergency preparedness, including their definitions is given in this section of the work. For the evaluation of obtained results it is useful to make familiar with basic concepts of the NPP safety evaluation, PSA and the stress tests. Obviously, it is necessary to describe the KARS method and to define the concept of quality of human performance with regard to the obtained results. The risk analysis by the KARS method was carried out in the four consecutive steps: 1. Data collection for the risk analysis. 2. Data processing by the use of the KARS method. 3. Interpretation of the obtained results. 4. Comparison of the obtained results with the available data. The particular risks for the construction of the risk correlation table were based on the analysis of activities of individual members of the emergency and technical support center on the basis of managing documentation for each function. In the emergency instructions these risks are either named or the action to manage them are determined. Subsequently these risks are further more specify according to the operational documentation used for solving abnormal and emergency conditions or solving of severe accidents. Determination of the risk correlation seems to be subjective and requires a considerable degree of professional insight into the analyzed issues. The risk analysis was processed according to the procedure that was laid down by Ing. Stefan Pacinda, Ph.D. Each risk taken into consideration in this analysis is briefly described within the interpretation of obtained results. The coefficients of activity with the biggest value were found for these risks: human error, earthquake, plane crash, terrorist threat, errors in operating and managing documentation and fire. The coefficients of passivity with the biggest value were found for these risks: human failure, serious damage to health, ecological disaster, components malfunctions, radiation accident, nuclear material integrity damage and control system malfunctions. Comparison of the risks that were postulated in the stress tests and the risks that were considered in this analysis indicate that the ETE NPP emergency response was prepared to be able to cope these risks. Results of this analysis showed that the essential element for the safe operation of nuclear power plants is qualified, well selected and systematically trained staff. In light of the experience acquired during elaboration of this work I have concluded that the KARS method can be used for nuclear safety evaluation only in a limited way.
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Economic Research Bulletin (2014, No.1). Volume 12, Number 1, April 2014, Stress-Testing Analyses of the Czech Financial System
Česká národní banka
This edition of the Research Bulletin presents four articles that introduce the modelling framework of the various stress tests used regularly by the Czech National Bank. The first article focuses on the methodology of the current stress tests employed to assess the stability of the banking sector. It explains the links between the core and satellite models and how various adverse scenarios are generated to test the stability of the Czech banking sector. It also provides guidelines on how stresstest parameters should be calibrated. Concerns about liquidity played an enormous role in the recent financial crisis, and the second article therefore focuses specifically on the liquidity risk of the banking sector. It presents a well-defined methodology used also by other central banks, but tailors it to the specific conditions of the Czech banking sector. The third article presents a recently developed methodology for assessing the ability of Czech households to pay their debts. Using detailed household-level data, it quantifies how different adverse events, such as unemployment and higher interest rates on debt repayment, affect households’ incidence of becoming financially distressed. The fourth article introduces stress-test models for the insurance sector. It discusses the specificities of the stress tests developed for this sector. It also sets out how to extend these already advanced tests to align them with changes going on in the regulatory framework.
Fulltext:  PDF
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The emergency response organization of NPP Temelín operator
KOŠŤÁL, Jaroslav
This work deals with Organization of Emergency Response in NPP. According assignment this work summarizes its legal preconditions and consequently gives description of its practical realization. The necessary terminology is gathered and the basic overview of OER functioning is given. An attention is paid to staffing, structure and number of workplaces, the used documentation and also to the system of its readiness and functionality verification. The intent is to define the essential aspects of nuclear safety and to describe system of emergency planning and response in condition of real nuclear facility. In the second part of work a comparison of Stress Tests of EDU and ETE NPPs in the reason to evaluate how the goals of Emergency Response are met. The comparison of Stress Tests results is done in shape of tables. My interpretation of the established facts is: 1.The probability of earthquake exceeding the design resistant of structures, technological systems and structures is practically insignificant. The results are for both locations virtually identical. The project robustness of ETE NPP to earthquakes is slightly higher than EDU. 2.The flooding robustness of both our NPP sites is high. Both NPPs are due to its location very resistant to rain water flooding. To ensure a high level of resistance to rain water flooding requires regular maintenance of drainage systems. 3.EDU and ETE NPPs are resistant to earthquakes and in this way they are resistant to the extreme weather condition especially to the gusty wind too. 4.Secured power internal consumption supply systems on EDU and ETE NPPs are projected according to analogical basics and are enough robust to failure from common cause. To secure safe down-cooling of reactor unit the only one independent power supply system is sufficient. In project of ETE NPP there is in comparison with EDU NPP the next system of common independent power consumption supply. It is primarily intended to prevent damages in technology of secondary circle. Two DGs strongly improve the resistance of unit to SBO accident. 5.Heat removal from separate technological systems is on both power stations realized by using of analogical cooling system. Constructional differences in projects of our power stations are given by different time of their project works. There is a possibility that cooling systems of EDU NPP will be improved. 6.System of severe accident management is organized in the similar way at both facilities. The staff of Accident Board and Technical Support Centre is analogical. Recently the staff of TSC was reinforced to improve its ability to cope the multiply accident on several units. The documentation for solving of abnormal states, accidents and severe accidents has got the same basic structure. Procedures and guidelines are continually improved. Attention is paid to verification and validation of these procedures. 7.On the basis of performed Stress Tests there is a high possibility of gradual realization of partial administrative, personal and technological improvements that will be done in reason to improve Nuclear Safety and Organization of Emergency Response. The specific measures are summarized in the National Action Plan. An absolute elimination of an accident is impossible, but the probability of an accident with fuel degradation must be as low as it is reasonably possible to achieve. The NPP must be able to diminish the impacts of such event to the generally acceptable low. The ability to manage such events is the major goal of Emergency Response that should be taken as a sophisticated interdisciplinary system.
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Importance of bank stress tests in response to financial crisis
Honcová, Eliška ; Blahová, Naděžda (advisor) ; Brada, Jaroslav (referee)
This thesis deals primarily with issues of stress testing the banking sector in response to the current financial crisis. The first chapter briefly describes the basic causes of the financial crisis and its impact on the banking sector and the subsequent expansion into the European Union. A brief description of selected accepted European regulatory and supervisory reforms is followed. Their content is related to the stress tests. The second chapter describes in detail both the original and current stress testing methodology and shows the development in testing, which passed just after the outbreak of financial crisis. The additional tests of banks and the subsequent verification of test results are an integral part of the chapter. A key part of this work is to analyze the stress tests in Europe and then in CR for the year 2011. Test scenarios and specific test results are described here. In conclusion, the work tries to evaluate the adjustment of the Czech stress tests and their explanatory value compared to the European tests.
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Methods of bank ratings by central bank
Hampl, Richard ; Půlpánová, Stanislava (advisor) ; Dobrovolný, Marek (referee)
This bachelor thesis deals with the problem of bank ratings. The main part is focused on analysis and methods, which are used by the Czech National Bank. The first section consists of basic description of bank, central bank and the czech banking system. It also includes description of other groups, which operate on the financial market and are interested in bank ratings. Next section describes in detail how the supervision of banks by the Czech National Bank work. This section is divided into two parts -- top-down approach and bottom-up approach. The last section describes legislative changes and the supervision of banks in the Czech Republic during years 2006 and 2011.
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Financial stability, forms of its monitoring, reporting and assessment
Polášková, Lucie ; Půlpánová, Stanislava (advisor) ; Hradil, Dušan (referee)
This thesis deals with questions of financial stability in financial systems, monitoring, analyzing and assessment of financial stability from views of various national and international financial institutions. Enhanced attention is paid to the role of central bank in the area of financial stability. Central bank plays significant role in practice of monetary policy, regulation and supervision, prevention of financial instability and financial crisis solution. In this work is also mentioned Financial stability report issued by Czech National Bank and various reports issued by international institutions (e.g. BIS, ECB, IMF). These international institutions exercise activities to the support of financial stability. Thesis deals closely with instruments of assessment of financial stability. These instruments are indicators of financial stability and stress tests.
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