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Design and Creation of Proxy for Penetration Testing
Válka, Michal ; Bláha, Lukáš (referee) ; Dydowicz, Petr (advisor)
This bachelor’s thesis is aimed at design and development of proxy for penetration testing. The thesis is divided into three main parts and begins with a theoretical part, which is focused on fundamental technologies and principles on which the application is based. The second part is focused on comparison of currently available solutions. The third part contains the creation of the proxy itself. The last chapter contains a summary of this thesis and the benefits of the developed product for penetration testing.
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Study of the effect of the addition of the cellulose fibers on the selected properties of concrete
Blaha, Lukáš ; Hela, Rudolf (referee) ; Bodnárová, Lenka (advisor)
This dissertation desribes the behavior of cellulose fiber reinforced concrete. In the theoretical section one can find basic information on cellulose fiber and its methods of production and usage in concrete structures. One can find the information about the effect of high temperature on the mechanical and physical attributes of cellulose fiber reinforced concrete, and also a comparison with other fibers used in concrete based on the research done using scientific literature. Furthermore the details about particular cellulose fibers are provided. In the experimental section the formulas for CHRYSO and GREENCEL concrete are designed. The influence of the addition of various types of cellulose fibers into both liquid and solid states of concrete was researched. Tests were also done on the effect of high temperatures (600 °C and 800 °C) on the firmness and densitiy of concrete, its deformations and visual changes. Furthermore, the resistance of cellulose fibers was monitored by monitoring the development of the pH environment (from pH 4 to pH 12) with long-term deposition of different types of cellulose fibers in these environments.
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Mathematical Methods in Economics
Blaha, Ladislav ; Půža, Bedřich (referee) ; Novotná, Veronika (advisor)
This bachelor thesis is follow up to an analyses made of actual state of affairs in public administration and business ambience in Moldova, focusing on the missing professional terminology, which is necessary for the effective function of both sectors. The main purpose is to make an application, which would be used to determine the Levenshtein distance from two textual chains. This application is used primarily for comparing textual chains in different languages. In other words it finds the scale of their similarity the application will be used later to create a dictionary, which will focus on terminology from the area of public administration.
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Analysis of filler types onto the wood plastics composites
Blaha, Lukáš ; Pospíšil,, Ladislav (referee) ; Vaněrek, Jan (advisor)
Wood polymer composite (WPC) is a material that combines the wood material and the thermoplastic matrix. As filler to be used as wood flour and thermoplastic matrix will be used in primary or recycled polypropylene. WPC will be made by injection molding. The aim of the thesis is to find the optimal ratio between primary and recycled polymer in which the result will be the best physical and mechanical properties.
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Analysis of Automated Generation of Signatures Using Honeypots
Bláha, Lukáš ; Barabas, Maroš (referee) ; Drozd, Michal (advisor)
In this paper, system of automatic processing of attacks using honeypots is discussed. The first goal of the thesis is to become familiar with the issue of signatures to detect malware on the network, especially the analysis and description of existing methods for automatic generation of signatures using honeypots. The main goal is to use the acquired knowledge to the design and implementation of tool which will perform the detection of new malicious software on the network or end user's workstation.
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Network Attack Capture Using Honeyd Tool
Bláha, Lukáš ; Chmelař, Petr (referee) ; Drozd, Michal (advisor)
The bachelor thesis deals with Honeyd tool and its effectivity in capturing network attacks. At the beginning, there is a description of honeypots and its utilization in network security. An important part of the thesis is constituted by a practical implementation of network attacks and their analysis. The main goal is to create an extension for Honeyd tool which can emulate file sharing in operation systems Microsoft Windows XP, especially its free accessible part called null session. As results there are tests evaluating the level of detection of computer attacks by the created tool.
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Endocrine disrupting compounds in the environment
Ezechiáš, Martin ; Cajthaml, Tomáš (advisor) ; Kočí, Vladimír (referee) ; Bláha, Luděk (referee)
A great variety of chemical compounds are released into the environment on a daily basis. Some of these compounds might be dangerous for human health or wildlife and might persist in the environment. In recent years, there has been a growing interest regarding chemical substances which could interfere with hormone biosynthesis and metabolism, cause a deviation from normal homeostatic control or negatively influence reproductive system. These chemicals are called endocrine disruptors. This dissertation thesis studied novel brominated flame retardants and selected pharmaceutical drugs as potential endocrine disruptors, based on their effect on hormonal receptors. Assays for estrogenic activities were also used for the evaluation of biodegradation experiments and for the validation of a novel mathematical model that could predict the effects of a mixture of toxic compounds. The results indicated that some of the tested chemicals were able to inhibit hormonal response of estradiol and testosterone and act as an anti-estrogens or anti-androgens. In the case of biodegradation experiments, the measured estrogenic activities were in agreement with the analytical concentrations of applied estrogens. Suggested mathematical model for mixture toxicity yielded a good fit with the experimental data from...
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Measurement and toxicity of combustion generated nanoparticles
Sikorová, Jitka ; Topinka, Jan (advisor) ; Klusoň, Petr (referee) ; Bláha, Luděk (referee)
This thesis is focused on nanoparticles produced by internal combustion engines utilized in vehicles. It deals with spatial distribution of nanoparticles within urban areas, impact of alternative fuels usage on particle production and toxicity, and a particle toxicological testing methodology. Monitoring of airborne nanoparticles identified traffic as the main source of airborne nanoparticles in places with heavy traffic load (Prague), as well as in a small city with only local traffic (Čelákovice). Most particles were likely emitted during short episodes of high emissions (e.g. uphill acceleration). During the measurements, high-emission vehicles responsible for a large fraction of the air pollution were also identified. On the other hand, small non-road internal combustion engines, which are not subject to any limit on particle emissions, such as a lawn mower, were operated during the measurement and generated a large number of nanoparticles. The amount and characteristics of the particles produced by combustion depend on the combustion technology and the fuel composition. A large part of the thesis deals with alternative fuels and their effects on the quantity of produced particles and toxicity of organic matter adsorbed on the particles. Hydrotreated vegetable oil (HVO) exhibited the lowest...
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Validation of an adventure programme with cooperative elements in school p.e. lessons
Frainšic, Michal ; Fialová, Ludmila (advisor) ; Bláha, Ladislav (referee) ; Řepka, Emil (referee)
Validation of an adventure programme with cooperative elements in school P.E. lessons Summary of the thesis The thesis deals with validating an innovative motor program with adventure and cooperative elements at a Czech elementary school. The aims of the thesis was to observe possible changes under the influence of the programme in social acceptance of children in class, in their self-concept and the amount of physical activities in their leisure time. The study was a quasi-experiment, concretely a cross classification with repeated testing. It was realized in classes of 6th , 7th and 8th grade (12-14 year old boys) (N=154) in physical education lessons. The research was realized during 6 month, intervention time was 3 months and data were gained in three time intervals. We have used the Social acceptance questionnaire and Self-concept and quality of life questionnaire as main research methods. Results brought two statistically significant values, however, in practical significance they explain a small number of results. Values in the sub-scale Pupil-classmates relationship were statistically significant (p=0,031), which explained 3% of results, and values in the item Evaluation of satisfaction with factors effecting self-concept had the statistical significance p=0,002 explaining 6,5% of results. In the...
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