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Subtle Effects in Atmos and Molecules
Šimsa, Daniel ; Zamastil, Jaroslav (advisor)
The thesis is divided into two parts. The first part deals with radiative cor- rections in muonic hydrogen. The effect of vacuum polarization is studied, and the simplified derivation of the Wichmann-Kroll potential is presented. The en- ergy shift caused by vacuum polarization to the Lamb shift in muonic hydrogen is calculated and it agrees with results in literature. Further, the concept of the extended Bethe logarithm is introduced and its advantages are shown and used to calculate the combined self-energy vacuum polarization contribution to the Lamb shift in muonic hydrogen. The results given here are more accurate and somewhat different from others given in literature. In the second part, the ground-state en- ergy splitting due to the tunneling in a two-dimensional double-well potential is calculated. A systematic WKB expansion of the energy splitting is given. An in- terplay between curvature of the classical tunneling path and quantum nature of motion is observed. A series is found that describes systems with strong coupling like the proton transfer in malonaldehyde. The results show a strong sensitivity of the splitting on slight variations of the parameters entering the Hamiltonian linearly. This indicates a presence of quantum chaos in this problem. 1
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Subtle Effects in Atmos and Molecules
Šimsa, Daniel ; Zamastil, Jaroslav (advisor)
The thesis is divided into two parts. The first part deals with radiative cor- rections in muonic hydrogen. The effect of vacuum polarization is studied, and the simplified derivation of the Wichmann-Kroll potential is presented. The en- ergy shift caused by vacuum polarization to the Lamb shift in muonic hydrogen is calculated and it agrees with results in literature. Further, the concept of the extended Bethe logarithm is introduced and its advantages are shown and used to calculate the combined self-energy vacuum polarization contribution to the Lamb shift in muonic hydrogen. The results given here are more accurate and somewhat different from others given in literature. In the second part, the ground-state en- ergy splitting due to the tunneling in a two-dimensional double-well potential is calculated. A systematic WKB expansion of the energy splitting is given. An in- terplay between curvature of the classical tunneling path and quantum nature of motion is observed. A series is found that describes systems with strong coupling like the proton transfer in malonaldehyde. The results show a strong sensitivity of the splitting on slight variations of the parameters entering the Hamiltonian linearly. This indicates a presence of quantum chaos in this problem. 1
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Subtle Effects in Atmos and Molecules
Šimsa, Daniel ; Zamastil, Jaroslav (advisor) ; Cejnar, Pavel (referee) ; Šindelka, Milan (referee)
The thesis is divided into two parts. The first part deals with radiative cor- rections in muonic hydrogen. The effect of vacuum polarization is studied, and the simplified derivation of the Wichmann-Kroll potential is presented. The en- ergy shift caused by vacuum polarization to the Lamb shift in muonic hydrogen is calculated and it agrees with results in literature. Further, the concept of the extended Bethe logarithm is introduced and its advantages are shown and used to calculate the combined self-energy vacuum polarization contribution to the Lamb shift in muonic hydrogen. The results given here are more accurate and somewhat different from others given in literature. In the second part, the ground-state en- ergy splitting due to the tunneling in a two-dimensional double-well potential is calculated. A systematic WKB expansion of the energy splitting is given. An in- terplay between curvature of the classical tunneling path and quantum nature of motion is observed. A series is found that describes systems with strong coupling like the proton transfer in malonaldehyde. The results show a strong sensitivity of the splitting on slight variations of the parameters entering the Hamiltonian linearly. This indicates a presence of quantum chaos in this problem. 1
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Tunneled Data Extraction into Separate Flows
Nahálka, Roman ; Hranický, Radek (referee) ; Holkovič, Martin (advisor)
The goal of this work is to design and implement an application for extraction of tunneled data into seperate flows. The app will be removing all layers of encapsulation, that the file contains.The use of the app lays in better analysis and diagnostics of network communication. Thanks to removing the tunnels from the network flow, it will only contain data we can use. In the theoretical part, the work focuses on network architecture TCP/IP, the tunneling protocols and ways of capturing communication on the network. The practical part describes the way of retrieving test data, it also contains a design of the target application, as well as implementation of this design and testing of the final application.
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Crimes in the banking sector
Havel, Martin ; Jelínek, Jiří (advisor) ; Vokoun, Rudolf (referee)
This thesis deals with criminal activities in relation to the banking sector. To highlight the importance of banking to the national economy, is seized most crime committed here. The perpetrators come from these areas. First, working within the banking sector - shareholders, officers and employees, the other so-called third parties outside the banking sector. Their common goal - to seize the funds in the bank for their own enrichment. Mostly for the money of depositors. This is a specific crime. Aim - show status of de lege lata. The prevention of crime, also show the possibility of de lege ferenda. In order to prevent crime and reduce the degree of damage.
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Obfuscation of Anomalies and Security Incidents in DNS Traffic
Štěrba, Ondřej ; Kováčik, Michal (referee) ; Homoliak, Ivan (advisor)
The work analyze current detection methods of anomalies and security incidents in DNS traffic, and than design new obfuscation techniques which are capable of evading anomaly detection. Network attacks, exploiting the DNS protocol for tunneling of other network traffic, were selected for implementation part of the work. Control of botnet is considered as malicious application of tunneling through the DNS protocol. The main result of the work is to emphasize the necessity of discovering new detection principles of anomalies and security incidents in DNS traffic.
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Design of new laboratory exercises for GNS3 network simulator
Bureš, František ; Červenka, Vladimír (referee) ; Jeřábek, Jan (advisor)
The goal was to create three laboratory tasks with process and help in GNS3 environment. All laboratory tasks should be used for extending practise experiences from Cisco course CCNP and illustration of GNS3 function. Whole thesis is focused on using IPv6 and coexistence with IPv4. Teoretical parts are dedicated for preparation on laboratory tasks and their main goal is explaining and use of commands in specific problematics. In GNS3 environment, there is explained instalation and basic settings. Laboratory tasks on theme MP-BGP, IPv6 tunnels and IPsec VPN with use of VTI are divided into specific parts. The parts consist of the described procedures with topology, detailed instructions and the entire configuration in Annex.
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Physics Simulation for Pinball Game
Čermák, Jakub ; Polok, Lukáš (referee) ; Zachariáš, Michal (advisor)
The objective of this work is to create a library for physical simulation and using the library to create a game of pinball, on which you can test functionality of the library. Problems that appeared during the creation of the library, are described in this paper along with their solutions. In particular, tunneling, detection and results of collisions. Subsequent optimization solutions to these problems for our specific library. Of no smaller importance are principles which reduce the requirements of the final simulation. Among the most important ones are the correct choice of limits, detection of rolling and sleep of slowly moving dynamic objects.
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Physical Simulation in Virtual Reality
Grünseisen, Vojtěch ; Navrátil, Jan (referee) ; Pečiva, Jan (advisor)
This work describes using of SDL, OSG and ODE as tools in game development and how they can be integrated to work together. Theory about collision detection and its role in physics engine is also described. Used libraries are described as well. With this engine a game scene is created and driven. This scene contains bodies connected by ODE Joints. Scene content and application controls are meant to resemble first person shooter game style.
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Effective Network Anomaly Detection Using DNS Data
Fomiczew, Jiří ; Žádník, Martin (referee) ; Kováčik, Michal (advisor)
This thesis describes the design and implementation of system for effective detection of network anomaly using DNS data. Effective detection is accomplished by combination and cooperation of detectors and detection techniques. Flow data in NetFlow and IPFIX formats are used as input for detection. Also packets in pcap format can be used. Main focus is put on detection of DNS tunneling. Thesis also describes Domain Name System (DNS) and anomalies associated with DNS.
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