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Titanium dioxide blocking layers fabricated by material printing
Lásko, Ondřej ; Pospíšil, Jan (referee) ; Dzik, Petr (advisor)
In this theses TiO2 blocking layers were fabricated using material inkjet printing and spincoating methods. These layers were then analyzed using cyclic voltammetry to find any defects and to determine the type of those defects. We found that layers of over 120 nm made using ITO glass and spincoating method had the best blocking capabilities. Blocking layers prepared using FTO glass were underperforming greatly throughout the whole experiment. We also achieved good results with material ink jet printing. The best results out of all printed samples were achieved with DPI of 635, although these layers also had problem with the electrolyte rising through microscopic pores in the layer thus changing the results.
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Practical Demonstrator for Maritime Navigation
Michálek, Aleš ; Pospíšil, Jan (referee) ; Mašek, Pavel (advisor)
This bachelor thesis deals with the issue of naval buoys and their types. The theoretical part is about the history, physical construction of buoys, different types of colors, and the rhythm of lights. In the second, practical part is described the process of creating a 3D model of a buoy, miniaturized HW for electrifying the buoy model, and programming the code for a given microcontroller. In the end, the possibility of further expansion options is outlined.
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Design of system soil and water conservation measures in Lhotecký stream catchment area
Pospíšil, Jan ; Ručková Sala, Aleksandra (referee) ; Dumbrovský, Miroslav (advisor)
The subject of the Master´s thesis is to design comprehensive flood control measures in the catchment Lhotecký stream in the built up areas of Nová Lhota village, who for several years struggling with the problem of water entering into the urban area during heavy rainfall. On the basis of this Master´s thesis, was created study of resolving the issue of flooding in the village, to a lesser extent, soil erosion and not least improve the ecological stability of the landscape around. For the analysis of the current situation was used digital maps in the GIS and subsequent application of the calculated values to the model DesQ. Through the standard formulas for dimensioning was created for a comprehensive protection of the village. This proposal will in the future serve as a basis for comprehensive land consolidation.
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Focused eletron beam induced deposition
Juřík, Karel ; Zmeškal, Oldřich (referee) ; Pospíšil, Jan (advisor)
Within this work, a set of depositions induced by focused electron beam was prepared. The depositions were prepared in the presence of water vapours from trimethyl(methylcyclopentadienyl)platinum(IV) precursor. The dependence of prepared materials purity on beam accelerating voltage and water vapour pressure was measured. The best platinum content was achieved at (27,2 ± 0,4) at. %, with beam accelerating voltage 5 kV, beam current 1600 pA and water vapour pressure 100 Pa. Due to subsequent long-term exposure to light, air humidity and air oxygen, the platinum content was increased to (39,2 ± 2,1) at. %.
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Computer-Controlled Planting
Pospíšil, Jan ; Šimek, Václav (referee) ; Růžička, Richard (advisor)
This work is focused on the issue of plant cultivation in domestic conditions. We focused on the automation of the growbox using the Wemos D1 R32 ESP32 board, which then consists of the design and implementation of three parts of the solution, i.e. the growbox itself, including the sensors needed to maintain ideal conditions for the plant being grown, the user applications, for interpreting the values and the configuration of the growbox. Application to collect data from growbox, for later analysis. The solution includes the creation of a demonstration growbox, software for all parts and comparison with available home growing systems.
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Implementation of the LoRaWAN Communication Technology Using the Network Simulator 3
Mašek, Petr ; Pospíšil, Jan (referee) ; Mašek, Pavel (advisor)
The diploma thesis focuses on the description of LPWAN (Low Power Wide Area Network) technologies for use in IoT (Internet of Things) communication scenarios. The theoretical part compares communication technologies operating in the license-exempt frequency band, i.e. Sigfox and LoRaWAN (Long Range Wide Area Network). Furthermore, technologies using the licensed frequency spectrum are discussed, specifically, attention is focused on NB-IoT (Narrow Band IoT). Emphasis is placed on LoRaWAN technology and the properties of the unlicensed frequency band below the 1 GHz, which is utilized by this technology. The practical part of the thesis consists of the evaluation of simulation scenarios using an integrated module in the simulation environment NS-3 (Network Simulator 3). Attention is focused mainly on the analysis of data transmission success using selected communication parameters of LoRaWAN technology. The obtained simulation outputs with a focus on mMTC (massive Machine-Type Communication) communication scenarios confirm the relationship between the number of end devices and gateways, communication distance and transmission reliability, or the limit value for the duty cycle.
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Advanced detection of rogue access point in wireless networks
Šebestová, Dominika ; Pospíšil, Jan (referee) ; Fujdiak, Radek (advisor)
The aim of the bachelor’s thesis is to get acquainted with the available implementation options of Rogue Access Point (RAP) and the detection methods used to detect such points from the side of the client or server, and from the principles of the studied methods implement a solution that is able to detect various types of the Evil Twin (ET). The thesis covers implementation of detection methods based on TCP connection properties and a method monitoring data frames, specifically their arrival time, specific length and source and destination MAC address. Connection of these methods creates an universal detection methods on the client’s side that is tested on the experimental network.
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ECG quality estimation
Pospíšil, Jan ; Smíšek, Radovan (referee) ; Smital, Lukáš (advisor)
This bachelor thesis deals with the question of estimation of the quality of the ECG signals, which is a key parameter for determining the diagnosis. The theoretical part deals with the basic knowledge concerning cardiac physiology, electrocardiography and finally the types of interferences that can occur during the measurement. The following practical part will deal with the published methods and the proposal of methods for estimating signal quality and their testing on artificial and real data.
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Wireless sensor based on LoRa technology
Pospíšil, Jan ; Krajsa, Ondřej (referee) ; Troják, David (advisor)
The bachelor thesis in theoretical part is focused on wireless technologies used for home control and automation devices where low power consumption is required. There are mentioned possibilities of each technology, energy requirements, range and throughput. The result of practical part is design and construction of a wireless temperature sensor which uses LoRa technology to communicate with a gateway and is also capable to last on battery for years. Additional feature is user possibility to use GPIO pins in form of relays. The task also covers design and construction of a gateway which listens for LoRa packets and communicates with PHP application on server side. Last step of practical part is focused on design of PHP application, which is responsible for visualization of received data.
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