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On possible approaches to detecting robotic activity of botnets
Prajer, Richard ; Palovský, Radomír (advisor) ; Pavlíček, Luboš (referee)
This thesis explores possible approaches to detecting robotic activity of botnets on network. Initially, the detection based on full packet analysis in consideration of DNS, HTTP and IRC communication, is described. However, this detection is found inapplicable for technical and ethical reasons. Then it focuses on the analysis based on network flow metadata, compiling them to be processable in machine learning. It creates detection models using different machine learning methods, to compare them with each other. Bayes net method is found to be acceptable for detecting robotic activity of botnets. The Bayesian model is only able to identify the botnet that already executes the commands sent by its C&C server. "Sleeping" botnets are not reliably detectable by this model.
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The chosen validation parameters of method for assessment of aroma compounds in processed cheese analogues
Burdějová, Lenka ; Horváthová, Viera (referee) ; Vítová, Eva (advisor)
This Bachelor‘s thesis deals with the issues of method validation for assessment of aroma compounds in processed cheese analogues. The method is based on the isolation of volatiles from the sample using Solid Phase Microextraction (SPME) and their subsequent determination by gas chromatography. The theoretical part focuses on general characteristics, classification and producing technology of processed cheese analogues. Further, aroma active substances contained in cheese analogues, differences from the classic processed cheese and processed cheese analogues occurring on the Czech market are mentioned. The methods for determination of aroma active compounds with a focus on Solid Phase Microextraction and gas chromatography are briefly mentioned. Within experimental part of the work the linearity and repeatability of the SPME-GC method were verified and detection limits and limits of quantification of selected standards were determined. Then the method was applied to chosen samples of processed cheese analogues with addition of different types of vegetable fats.
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French System of Innovation
Horáková, Jana ; Vlčková, Jana (advisor) ; Vošta, Milan (referee)
This thesis is focused on French innovation system and its outputs. The aim is to analyze innovation performance of France, as well as its innovation policy and to find out the meaning of the innovation system for French economy and its competitiveness. The thesis also includes a case study of a shareholder and presents his perspective. The first chapter explains basic definitions and innovation related terms and reviews innovation associated theories. The second chapter examines the French innovation system evolution and its performance based on statistical data. Moreover, the French innovation business conditions and an innovation policy will be discussed. Following the analysis of the French innovation system, the last chapter evaluates whether the target of reinforcing innovation capacity is met. At the same time, the third section presents a player of the system, Raise company, and its position within this innovation system.
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Automotive plastics with increased scratch resistance
Vida, Mikuláš ; Kučera, František (referee) ; Jančář, Josef (advisor)
The aim of this bachelor thesis was the investigation of changes of mechanical and rheological properties of nanocomposites based on PMMA, where filler was fumed silica of four types (different surface area and producer). The thesis focuses on the theoretical part of the current state of research, preparation and properties of nanocomposites. The solvent method was chosen for the preparation of nanocomposites, where silica was mixed with dissolved PMMA. Tensile mechanical properties were measured below Tg, while viscoelastic response was measured above Tg. Silica had not significant influence on the modulus below Tg, but above Tg (180 °C) both modulus, storage and loss, have increased with increasing silica content and with increasing frequency (0,1–100 Hz). The particle size and surface area of silica in a content of 1 % influenced storage modulus of nanocomposites more with respect to the content of 2 %. For samples containing 1 % showed that the significant role played particle size and surface area of silica. The greatest increase of storage and loss modulus of PMMA was reached for silica M-5 in content 1 %. All type of silica decreased tensile strength and strain with increasing silica content in the same way.
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Exxon Mobil stock investment analysis
Stanko, Marek ; Veselá, Jitka (advisor) ; Fičura, Milan (referee)
The main aim of the following thesis is the ExxonMobil stock investment analysis and finding of the investment recommendation. The paper is based on available fundaments in global, sectorial and enterprise economy, which are used for comparison of share's actual price and its intrinsic value. Technical analysis is an additional part used for the share price determination in short term. It is also used for making conclusion and approach recommendation to this financial instrument.
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Design of operation of a new 120 MW Maloměřice heating plant power source in E.ON 110 kV power distribution network
Janda, Petr ; Vaculík, Petr (referee) ; Blažek, Vladimír (advisor)
Before putting new power distribution installation into operation and before the connection to grid is needed to validate connectivity of the installation. Purpose of verification is to check compliance with the technical conditions of relevant regulations. Ones of the most important conditions include compliance with the prescribed connection voltage tolerance at the connecting device – and even in the worst-case – and provide necessary short-circuit capability of the other devices in a connected grid. Main task of my master’s thesis is just checking that the voltage tolerance and the control of short-circuit resistance. The calculations were performed by using the dispatching control system that works with the current parameters of the distribution system equipment 110 kV. Theoretical part of thesis describes two main points of the method of calculating the network operation and the method of calculating short-circuit conditions. Based on these theoretical processes are relevant input data processed and evaluated in the dispatching control system. The calculation and evaluate results are presented in the final part of the master’s work.
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Design of omni directional mobile robot (O3-X) control
Olša, Petr ; Ošmera, Pavel (referee) ; Matoušek, Radomil (advisor)
This thesis deals with the design of a three-wheeled omni-directional robot control. The model of control is designed for robot´s omni-directional platform driven by maxon motor with the intelligent positioning controller EPOS. The design of control contains: - installation of the coordinated systems and transformation from one of them into another - design of system´s kinematical model - creation of classes for control and communication with EPOS - creation of the simulative program - planning of the mobile robot´s path - verification that the system is working The solution was based on continuous accelerated motion and the maximal acceleration of wheels was concerned, so that the slip would be suppressed. The function of the model was partly verified.
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Potential of IoT in Smart City
Pavlíček, Tomáš ; Gála, Libor (advisor) ; Basl, Josef (referee)
The aim of this masters thesis is to identify, in which phase of adoption of Internet of Things (IoT) application areas of concept Smart City are nowadays Czech regional cities, what is their outlook to 2025 and also identify in which dimensions of concept Smart city, supported by IoT technologies, perceive Czech regional cities the greatest potential. Based on information obtained from the studied materials, the concept of Internet of Things (IoT) is described, along with a detailed description of one of its application area, namely Smart City. This area is further divided into specific dimensions, that cover specific application areas which can, through internet technology, support things in a special way. With these insights, the questionnaire (built on identified IoT application areas of smart city) was developed. Thesis should be beneficial for all towns in the Czech Republic, because it provides a comprehensive view of individual IoT application areas of concept Smart City including information on which of these IoT application areas are currently focusing regional cities, and on which they want to focus to the future. On the other hand, the survey results could also be beneficial for commercial entities, which focus on IoT implementation in cities. These entities will be able to recognise which IoT products are currently best for cities.
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Analysis and design of intranet structure
Novák, Miroslav ; Pour, Jan (advisor) ; Šedivá, Zuzana (referee)
Nowadays, Intranet is an inseparable part of every company, notwithstanding of their size or field of activity. Both, in my work and personal life, I often come across different intranets that usually do not get a positive response. But they usually have the same source of the problem, which is based on their wrong structure. This is why is chose this topic for my thesis. The goal of my thesis is to perform an analysis of an existing intranet of a particular company and subsequently create a design of the intranet new structure using the card-sorting method. This thesis primarily represents a generalized method of how to proceed during such realization and which areas to look into. Theoretical part of this thesis covers the topics of information architecture and also the term intranet itself, where the most frequent issues I came across in the intranets are pointed out. Practical part covers the analysis itself, where I focus on the structure of the existing intranet, categorization of its content, connections with other systems, customization, permission management, surveys of contentment, and intranet usage. The analysis is performed manually by scanning through the existing intranet of the company, since other methods or approaches could not be applied due to technical limitations or insufficient permis-sions. Based on the outputs of the analysis, web categorizations and the card-sorting method, a design of a structure of the new intranet has been proposed. The design itself is a demonstration of the method how to approach the new intranet design.
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Processing of reinforced alumina ceramics
Kachlík, Martin ; Trunec, Martin (referee) ; Maca, Karel (advisor)
Literature review of processing and toughening of bulk Al2O3 ceramics was performed. Based on performed experiments, optimal technological conditions of infiltration of alumina ceramics by nickel oxide and zirconia dioxide were found. These approaches were used for preparation of toughened alumina. The properties of sintered alumina matrix composites were discussed from the point of view of their hardness, bending strength, microstructure and phase composition.
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