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Webmail Traffic Reconstruction
Slivka, Miroslav ; Ryšavý, Ondřej (referee) ; Veselý, Vladimír (advisor)
Webmail applications are very popular these days. Besides typical usage, thanks to ciphered communication, they can be used for malicious activity like confidential data loss. This thesis discusses webmail events detection based on common webmail signatures in captured network traffic. Also there will be discussed SSL/TLS interception and decryption for further data analysis. The modules in this thesis are designed and implemented for Netfox.Framework forensics analysis tool. The Netfox project is developed at FIT BUT under security research project SEC6NET.
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Synthesis of the electronically reconfigurable frequency filters
Michalička, Filip ; Dvořák, Jan (referee) ; Langhammer, Lukáš (advisor)
This diploma thesis deals with design of reconection-less electronically reconfigurable filter structures which have single input and single output using unconventional active elements, which have ability to adjust one of their parameter e.g. gain or transconductance. The first part describes basic parameters of frequency filters, the division of filters by frequency transfer response and used circuit elements, their operational modes, the principle of reconnection-less electronically reconfiguration and the circuit design method MUNV. Second part describes all active elements used in the proposal of filters, their properties and the implementation using existing transistor-level models. The third part contains the design of three reconnection-less electronically reconfigurable filters and the simulations results obtained from simulation programs OrCAD Capture and PSpice. The obtained results were compared with theoretical behaviour. This part also contains results of these analyses: sensitivity, parasitic, Monte Carlo and temperature to determine the behaviour in varied cases.
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Laboratory of Quality of Service
Eltahir Ahmadon, Ahmed ; Kolka, Zdeněk (referee) ; Polívka, Michal (advisor)
The Bachelor's work, you are reading, deals with the issue of VoIP calling and measurement its quality. In the following paragraphs the discussion will be about the basics of networking protocols such as TCP, UPD, IP and SIP, after that a preliminary introduction to QoS issues - ways of measuring voice quality for instance MOS and E-Model. Importance of implementing QoS for VoIP, and QoS parameters used in the proposed services (will be called "mechanisms"), such as Best effort service, Integrated and Differentiated services. Based on these fundamentals points with designed laboratory for quality of service. The laboratory will be aimed at testing the quality of codecs with regard to bandwidth, jitter, delay and packet loss. The solution lies in the fact that, which codecs are actually suitable for the service.
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Human Mo-cap System Based on Inertial Measurement Units
Grzybowská, Martina ; Semerád, Lukáš (referee) ; Drahanský, Martin (advisor)
Cieľom tejto práce je navrhnúť, zhotoviť a implementovať vlastný systém pre zachytávanie pohybu založený na inerciálnych meracích jednotkách. V rámci budovania teoretického základu bolo preskúmaných viacero metód, avšak primárne bola pozornosť venovaná samotnému inerciálnemu snímanu - jeho kladom a nedostatkom, kľúčovým vlastnostiam a jednotlivým komponentom potrebným pre zostrojenie systému na jeho báze. Tento úvodný zber informácií je nasledovaný fázami návrhu, zhotovenia a zhodnotenia, ktoré sa zaoberajú procesom vývoja a testovania daného riešenia. Hlavným prínosom realizácie systému je zostrojenie zariadení pre snímanie pohybu - jedná sa o malé, ľahké, batériovo napájané zariadenia, ktoré sú kompletne bezdrôtové, či už z hľadiska komunikácie s okolitým svetom, alebo vďaka napájaniu kompatibilnému so štandardom Qi.
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Utilizing Unconventional CMOS Techniques for Low Voltage Low Power Analog Circuits Design for Biomedical Applications
Bay Abo Dabbous, Salma ; Horský, Pavel (referee) ; Ďuračková, Daniela (referee) ; Khateb, Fabian (advisor)
Tato disertační práce se zabývá navržením nízkonapěťových, nízkopříkonových analogových obvodů, které používají nekonvenční techniky CMOS. Lékařská zařízení na bateriové napájení, jako systémy pro dlouhodobý fyziologický monitoring, přenosné systémy, implantovatelné systémy a systémy vhodné na nošení, musí být male a lehké. Kromě toho je nutné, aby byly tyto systémy vybaveny baterií s dlouhou životností. Z tohoto důvodu převládají v biomedicínských aplikacích tohoto typu nízkopříkonové integrované obvody. Nekonvenční techniky jako např. využití transistorů s řízeným substrátem (Bulk-Driven “BD”), s plovoucím hradlem (Floating-Gate “FG”), s kvazi plovoucím hradlem (Quasi-Floating-Gate “QFG”), s řízeným substrátem s plovoucím hradlem (Bulk-Driven Floating-Gate “BD-FG”) a s řízeným substrátem s kvazi plovoucím hradlem (Bulk-Driven Quasi-Floating-Gate “BD-QFG”), se v nedávné době ukázaly jako efektivní prostředek ke zjednodušení obvodového zapojení a ke snížení velikosti napájecího napětí směrem k prahovému napětí u tranzistorů MOS (MOST). V práci jsou podrobně představeny nejdůležitější charakteristiky nekonvenčních technik CMOS. Tyto techniky byly použity pro vytvoření nízko napěťových a nízko výkonových CMOS struktur u některých aktivních prvků, např. Operational Transconductance Amplifier (OTA) založené na BD, FG, QFG, a BD-QFG techniky; Tunable Transconductor založený na BD MOST; Current Conveyor Transconductance Amplifier (CCTA) založený na BD-QFG MOST; Z Copy-Current Controlled-Current Differencing Buffered Amplifier (ZC-CC-CDBA) založený na BD MOST; Winner Take All (WTA) and Loser Take All (LTA) založený na BD MOST; Fully Balanced Four-Terminal Floating Nullor (FBFTFN) založený na BD-QFG technice. Za účelem ověření funkčnosti výše zmíněných struktur, byly tyto struktury použity v několika aplikacích. Výkon navržených aktivních prvků a příkladech aplikací je ověřován prostřednictvím simulačních programů PSpice či Cadence za použití technologie 0.18 m CMOS.
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VoIP Quality Analyzer
Krajíček, Michal ; Žádník, Martin (referee) ; Tobola, Jiří (advisor)
This thesis deals with the quality of the IP telephony and its measuring using the netflow technology. It describes individual factors influencing the quality from sampling and quantization over the impairment caused by codecs to the degradation during network transfers. Next part focuses on models allowing to regard quality of IP telephony with emphasis to the E-model and R-factor. It shortly describes the netflow technology and the quality measuring connected with it. Practical part describes the principle of how the quality is measured by the netflow probe nProbe together with offer and implementation of application measuring the quality. The comparison with commercial application is presented and the results are discussed.
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Metal Detecting Ownership and Non-Ownership Motives
Hrušák, Jan ; Gregor, Martin (advisor) ; Kučera, Tomáš (referee)
This thesis addresses the phenomenon of hobby metal detecting in the Czech Republic, aiming to determine whether individuals' wealth influences the for- mation of detected finds collections. The mass spread of metal detecting in the Czech Republic since the 1990s has proven the significance of studying this activity. The phenomenon of metal detecting can be classified under contest theory, where agents make costly efforts to compete for a limited resource, which in this case is archaeological finds. From the standpoint of economics, a study about resources allocation, the metal detecting hobby can be an in- triguing topic for investigation. This thesis presents estimates of models based on five different datasets, each containing several thousands of observations obtained from a renowned Czech metal detecting website. The findings sug- gest that relatively wealthier metal detectorists are more likely to submit coins, but not artifacts. Given that coins form a relatively homogeneous group, the estimation results associated with coins might be applied to the formation of finds collections overall. Hence, the collecting of finds is likely to be negatively associated with an individual's socioeconomic status. JEL Classification D14, D61, D91, O33, Q01, Q32, Q34, Z13 Keywords hobby, private ownership,...
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Qualified Call for Statement pursuant to Section 114b of the Civil Procedure Code
Krejčí, Adam ; Sedláček, Miroslav (advisor) ; Smolík, Petr (referee)
Qualified Call for Statement pursuant to Section 114b of the Civil Procedure Code Abstract This thesis examines the institute of a qualified call for statement as a method of preparation of a hearing on the merits. An integral part of it is also the institute of a fiction of recognition of the claim, which occurs, inter alia, if the respondent fails to properly and in time comply with the qualified call for statement. If the aforementioned fiction is applied, the court shall decide on the matter without further delay by a judgment of recognition. The primary purpose of the qualified call for statement is to fulfil one of the fundamental principles of civil procedure, the principle of expeditious proceeding as one of the elements of the constitutionally guaranteed right to a fair trial. We refer to the qualified call for statement specifically with regard to the enhanced requirements which the respondent's response has to meet in order to properly comply with such a call. The characteristic feature of this institute is the strengthening of the principle of formal truth over material truth, since as a result of potential inactivity on the respondent's side, the proceeding is curtailed by the non-realisation of a wide range of procedural principles and the adversarial proceeding therefore ex lege and de facto...
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Uptake of heavy metals - the role of the root system
Homola, Adam ; Tylová, Edita (advisor) ; Mašková, Petra (referee)
Heavy metals are important soil pollutants and pose a significant risk to plants under certain conditions. These include some essential microelements (Fe, Zn, Mn, Mo, Cu, Ni) and toxic metals (e.g. Cd, As, Pb, Hg). Essential microelements have important functions in plants, and are mainly involved in plant metabolism as cofactors of enzymes. Toxic metals have no function, yet they enter the plant in varying degrees from the environment and cause toxicity. However, excessive concentrations of essential metals in the plant also have negative effects and plants have different mechanisms to counteract these negative effects. The bachelor thesis focuses mainly on the uptake of heavy metals from the soil by the root, which is achieved by membrane transporters. It also discusses several mechanisms involved in defence against heavy metal toxicity, not only in terms of regulating uptake, but also after heavy metals have entered plant bodies. These mechanisms are an important aspect of hyperaccumulation, which is also included in this thesis. Hyperaccumulators use these mechanisms on a completely different scale than non-hyperaccumulators, which allows hyperaccumulators to live in environments where heavy metal concentrations are high, making them completely different from each other. The properties of...
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Use of Kinect sensors for Motion Capture with Source Filmmaker and Blender software
VANĚK, Jan
The aim of my bachelor thesis is process the possibilities of using Kinect sensors for Motion Capture in Source Filmmaker and Blender programs. Motion Capture is a technology that captures motion by using Kinect sensors and applying the obtained data in 3D graphics programs. My main goal will be primarily to explore on subsequently describe the exact procedure to process the data obtained from Kinect sensors in Blender and Source Filmmaker. Furthermore, my other goals are comparison of the use of this technique to classical manual animation, the advantages and disadvantages of use in individual programs will be described and the possibilities of combining Motion Capture and classical animation will be tested. I´ll also try to modify Kinect hardware for Xbox One for direct connection to a Windows computer. Furthermore, a comparison of the quality of Motion Capture from Kinects for Windows and the Xbox One and comparison of capturing motion with one or more Kinect sensors. For the practical part I will create my own animated sequences, captured by Kinects in combination with manual animation in Blender and these sequences will be used in Unity to create an interactive movie that the user himself will be able to control.
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