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Security mechanisms of OS Android utilizing the Kotlin language
Balaževič, Lukáš ; Mašek, Pavel (referee) ; Zeman, Kryštof (advisor)
Mobilné zariadenia sú v rámci technologickej histórie novinka a pri technológii, ktorá sa vyvíja tak rapídnym tempom a rastom používania je nutné dbať na zabezpečenie. Táto diplomová práca sa zaoberá rozborom bezpečnostných mechanizmov používaných v Android OS a komunikáciou medzi OS Android a vzdialeným serverom. Cieľom je preskúmať tieto mechanizmy a otestovať aké kryptografické metódy a postupy je najvýhodnejšie používať z hľadiska bezpečnosti s ohľadom na efektivitu. Tieto znalosti boli použité pre vytvorenie demonštračného systému, ktorý využíva vybrané zabezpečovacie mechanizmy a kryptografické postupy.
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Modelling of mmWave Propagation Channel for Off-body Communication Scenarios
Zeman, Kryštof ; Vozňák, Miroslav (referee) ; Gaydamaka, Yulia (referee) ; Hošek, Jiří (advisor)
Předkládaná disertační práce je zaměřena na \uv{Modelování propagačního kanálu pro off-body komunikaci v oblasti milimetrových vln}. Navzdory pokrokům v rámci bezdrátových sítí v přímé blízkosti člověka stále systémy 5. generace postrádají dostatečnou šířku pásma a dostatečně nízkou odezvu. To je způsobeno neefektivním využíváním rádiového spektra. Tento nedostatek je potřeba co nejdříve odstranit a právě z tohoto důvodu je hlavním cílem této práce navrhnout vylepšený model rádiového kanálů pro off-body komunikaci. Úkolem tohoto modelu je umožnit uživatelům efektivněji a přesněji simulovat propagaci signálu v rámci daného prostředí. Navržený model je dále optimalizován a ověřen vůči nejnovějším měřením, získaným z literatury. Nakonec je tento model implementován do simulačního nástroje NS-3, pomocí kterého je následně využit k simulaci množství scénářů. Hlavním výstupem této práce je ověřený model přenosového kanálu pro off-body komunikaci v rámci milimetrových vln, společně s jeho implementací do simulačního nástroje NS-3, díky čemuž je dostupný pro širokou veřejnost.
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Impact of aerial platform material on antenna gain
Tobolka, Lukáš ; Zeman, Kryštof (referee) ; Pokorný, Jiří (advisor)
The goal of this thesis is to recreate some of the most used multicopter configurations within CAD software with varying materials. These models are then imported into ANSYS HFSS to examine the influence of shape and material on the performance of an antenna. Results from these tests could help in the creation of a high-speed (Gb/s) backhaul network in the future. The theory section is about multicopters, their configurations and materials used in their manufacture. Subsequently, it delves into the fundamental theory behind antennas and the description of CAD software (Autodesk Inventor 2016) and antenna simulation software (ANSYS HFSS). The practical section includes: description of the measurement process for the MikroTik wAP 60G AP antenna, the parameters of which were used during the simulation; a model of the antenna (horn) and last but not least the results of the measurements, which are the thesis’ main benefit.
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Screw, Thou Shall Hate the Political Prisoner! Bory Mutiny as a Means to an End to Strenghten the Discipline Inside the Prison Guard Corps?
Zeman, Kryštof ; Randák, Jan (advisor) ; Rychlík, Jan (referee)
The thesis deals with so called "The Bory Rebellion" case, the trial fabricated by the communist regime, which took place in April and May 1950. The thesis captures the whole course of the trial, the issue by whom it was iniciated , how the investigation and hearing passed. Further it describes preparation and subsequent realization of the political campaign aimed to multiply the effects of the trial towards the Prison Guard Corps. It also seeks to find out whether the primary objective of the trial actually was to strengthen discipline within the Corps, or there was also another aim pursued by the ruling dictatorship, and how , and if at all, there was any coverage of the case towards the general public. Some attention is also paid to the victims of the trial and their further fates. The thesis primarily exploits original files of the National Archive and the Archive of the Security Bodies. Key words Prison Guard Corps, prison, rebellion, prison guard, political prisoner
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Implementation of Google Home voice assistant
Matula, Vladimír ; Štůsek, Martin (referee) ; Zeman, Kryštof (advisor)
The main goal of this bachelor thesis was to investigate the smart devices field together with technologies linked to it. Further, it describes the implementation of Google Assistant to Raspberry Pi 3 and options of controlling it via the Dialogflow platform. The thesis provides hands-on experience and is structured into two parts. The first, theoretical section focuses on Internet of Things and Device to Device communication. It also describes currently available smart home assistants and their functionalities. The thesis also describes the Dialogflow platform together with it's functionalities and options of it's use. The practical part of this thesis describes implementation of the Google Assistant in Raspberry Pi 3, development and integration of application created for it and the creation of home weather station.
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Development of an Amazon Alexa Skill for Amazon Echo
Dobrík, Andrej ; Zeman, Kryštof (referee) ; Pokorný, Jiří (advisor)
V posledných rokoch nastala významná zmena v spôsobe interakcie medzi používateľmi a inteligentnými zariadeniami. Pre ludí je najpraktickejší spôsob interakcie s týmito zariadeniami hlasová interakcia. Veľa firiem si túto zmenu v interakcií uvedomilo a začalo vytvárať software a príslušný hardware pre tento spôsob interakcie. Táto bakalárska práca sa bude venovať týmto produktom, konkrétne produktom Amazon Echo, ich schopnostiam a požiadavkam. Nasledujúc vysvetlením komunikácie Echa. Priblížením Amazon Alexa Skills Kit a vytvorením a implementáciou nového vlastného Amazon Alexa Skillu pre Amazon Echo.
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Utilization of Android Wear Platform for Voice-control Services in Smart Home
Frolich, Libor ; Zeman, Kryštof (referee) ; Hošek, Jiří (advisor)
The bachelor thesis deals with the connection of smart homes and voice-controlled assistants. There are described used devices: Huawei Watch 2, Raspberry Pi 3B+, TP Link LB130 smart lightbulb and Intertechno ITR-1500 wireless sockets. Linking has been achieved through the Actions SDK, combined with a smart Google assistant. The problem was implemented by connecting a simulated home and designing a server application. The server was running on the Raspberry Pi computer using the Node.js. At the end of the thesis was solved the problem of processing voice commands and updating of the operating system of smart watches.
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The "Ice" Phase of the Cold War on the Spines of Dikobraz: the Hardest Period of the Cold War (1947-1956) in satirical reflection of the West in the Weekly Dikobraz
Zeman, Kryštof ; Rychlík, Jan (advisor) ; Stehlík, Michal (referee)
The essay is focused on the way the West was being reflected during the most dangerous phase of the Cold War on the pages of the Czechoslovak satirical and humoristic weekly Dikobraz (in English The Porcupine). The observed period 1947 - 1956 is deliniated by two key events in the history of the Cold War, namely the Truman's doctrine in its beginning and the breakthrough 20th congress of the Soviet Union's communist party, which led to a certain relief of the harshest Stalinist course in the Eastern block. The essay seeks to capture main tendencies in creating the content of Dikobraz, who and what were most frequently attacked and why. Together with that the essay touches on changes in the editorial staff and an impact of the changes on its content. The task was, apart from other things, to show Dikobraz as an important instrument of anti-western propaganda in the service of the communist regime in Czechoslovakia. Powered by TCPDF (www.tcpdf.org)
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Family change and its impact on the health of children in the Czech Republic
Štípková, Martina ; Kreidl, Martin (advisor) ; Sobotka, Tomáš (referee) ; Zeman, Kryštof (referee)
The thesis focuses on the patterns of nonmarital childbearing and its influence on the health of newborns in the Czech Republic between 1990 and 2010. Numerous and profound social changes took part in these two decades after the fall of state socialism. Socioeconomic inequalities grew, a competitive job market was introduced and social policy was reformed. Family behaviour changed, as well. A more than four-fold rise of the proportion of children born outside marriage was among the most remarkable changes in this regard. Two research questions were addressed: 1. how did unmarried motherhood and its socioeconomic background change; 2. how did these changes influence disparities in the health of newborns by family arrangement. Data from the birth register are used for answering these questions and analysed with multilevel regression models. The method was aimed at explaining variability between contexts defined by time and space. Health of newborns is measured by birth weight. Family arrangement of mothers is measured with their marital status. Unmarried mothers are further split by the presence of a partner measured with the mother's willingness to declare child's father. The results show that birth outcomes on nonmarital children improved and marital status gap in birth weight closed substantially in the...
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