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Picobaloon s využitím low-power bezdrátových sítí
Kudera, Matěj ; Peringer, Petr (referee) ; Janoušek, Vladimír (advisor)
Aim of this master thesis was to create a small meteorological probe (PicoBaloon) which can record its position and basic meteorological information. Information recorded by this probe has to be transmitted to the user so it can be evaluated. Theoretical portion of this work describes how to create this type of device and which technologies can be used for its implementation. Next, information describing what exactly PicoBaloon is are presented, which are then used to form requirements for this system. Based on described technologies and system requirements final system design was created. Created system consists of two parts. First part is the probe itself which is created on its own piece of printed circuit board. Probe is controlled by a small microcontroller and consists of components that can generate power with a small solar panel, determine its position with GPS, record meteorological information and send recorded information to the user with wireless technology. Second part of the created system is a web application which presents recorded data to the user. At the end of this thesis physical creation and testing of this system is described.
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Self-assembled molecular layers on epitaxial graphene
Kovařík, Štěpán ; Švec, Martin (referee) ; Čechal, Jan (advisor)
Samouspořádání organických molekul je spontánní proces tvorby nanostruktur, při kterém je výsledná struktura určena mezimolekulárními and molekulárně-substrátovými interakcemi. Pochopení principů samouspořádávání je klíčem k přípravě funkčních nanostruktur s atomární přesností. Tato diplomová práce se zaměřuje na přípravu a studium samouspořádaných molekulárních struktur 4,4’-diphenyl dikarboxylové kyseliny na povrchu grafenu připraveného na Ir(111). Pro studium vlastností molekulárních struktur je využito rastrovací tunelovací mikroskopie a nízkoenergiové elektronové mikroskopie. Tato kombinace umožňuje získat informace z oblastí o velikosti v řádu nanometrů až milimetrů. V práci je popsána molekulární strukuktura stabilní při pokojové teplotě. Vazebný motiv této struktury je dán interakcí karboxylových skupin sousedních molekul.
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Single Atomic Catalysts
Závodný, Adam ; Švec,, Martin (referee) ; Čechal, Jan (advisor)
Single atom catalysts are prospective class of materials, which holds promises to reach the ultimate limit of improvement in catalyst performance, selectivity, lifetime and cost reduction. The ability to efficiently capture the adsorbates at the active sites is the key prerequisite for catalytic transformation to the products. In this respect, our experimental study aims to describe the interaction of gas molecules (H2O, CO, O2 and NO) with single metal atoms (Rh, Ir, Cu) on the magnetite surface employing scanning tunneling microscopy.
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Metal-organic networks on graphene surfaces
Kurowská, Anna ; Průša, Stanislav (referee) ; Čechal, Jan (advisor)
Molecular self-assembly is a spontaneous association of molecules and atoms into well-defined supramolecular structures. Understanding this process is key for preparation of structures with atomic precision. This thesis studies the supramolecular structure of tetrakyanochinodimetan molecules (TCNQ) and iron atoms on graphene grown on iridium crystal with the (111) surface. The surface analysis was performed by scanning tunneling microscopy, low-energy electron microscopy and x-ray photoelectron spectroscopy. The thesis introduces the growth process of a good quality graphene on Ir(111) and the synthesis of Fe-TCNQ networks 20 nm x 20 nm large and describes their structural properties. Three preferential orientations of Fe-TCNQ on graphene were identified. The networks will be used in follow-up studies targeting their magnetic properties.
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HW platform for surveillance over maritime container transport
Roško, Tomáš ; Možný, Radek (referee) ; Musil, Petr (advisor)
The complexity of international transportation is increasing, and with that, the logistics requirements also increase: such as the need to monitor containers’ location or measure inside conditions. Despite these demands, marine transportation faces specific technical problems, such as the need for sending data precisely, often, and with low energy consumption. This paper aims to create a monitoring device that meets the demands of marine transportation. The device combines satellite and mobile networks to control the container location and, at the same time, allows for precise pinpointing of place and availability of access while having low battery consumption. The theoretical part of the paper explains the process of selecting components and justification of the process with regard to market options. The practical part contains a diagram of the connection of the modules and sensors. Next, the design and manufacture of the printed circuit board and custom 3D printed box are discussed. The software part deals with data protocol and the description of the application, which is then tested with a particular focus on measuring and transmitting the values onto the server.
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New laboratory tasks for the course "Building automation"
Zamazal, Martin ; Zuth, Daniel (referee) ; Marada, Tomáš (advisor)
This master’s thesis extends the teaching possibilities of the course “Building automation” in two areas. The first area is the visualization of KNX educational panel, which is made through iRidium software package in several variants. The second area is the design and manufacture of the educational switch panel with different types of switches, in which students can simply try wiring, which are commonly used mainly in civil engineering. Part of the second area is the creation of several teaching tasks.
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UV-photochemical generation of volatile species of tellurium and other transition metals
Jeníková, Eva
This dissertation thesis is focused on UV-photochemical generation of volatile species of tellurium, ruthenium, rhenium and iridium coupled to methods of atomic spectrometry. In the first part, attention was paid to the optimization of parameters of UV-photochemical generation of volatile tellurium species and its application for speciation analysis of Te(IV) and Te(VI) in water samples. UV-photochemical generation was carried out in a UV-photoreactor, which consisted of a low-pressure mercury lamp wrapped with a polytetrafluoroethylene reaction coil that served as a reactor. Atomic absorption spectrometry with a continuum source of radiation and high resolution and atomization in a miniature diffusion flame were used to optimize the conditions of generation, which included the composition of the reaction medium, irradiation time and the addition of transition metals as modifiers. In order to achieve a higher sensitivity of determination, the generator was coupled to a triple quadrupole inductively coupled plasma mass spectrometer. Since efficient UV-photochemical generation of volatile species was achieved only from Te(IV), with no response from Te(VI), the feasibility of this technique for simple "non-chromatographic" speciation analysis was tested and a method for determination of Te(IV) and...
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UV-photochemical generation of volatile species of tellurium and other transition metals
Jeníková, Eva ; Hraníček, Jakub (advisor) ; Šíma, Jan (referee) ; Kanický, Viktor (referee)
This dissertation thesis is focused on UV-photochemical generation of volatile species of tellurium, ruthenium, rhenium and iridium coupled to methods of atomic spectrometry. In the first part, attention was paid to the optimization of parameters of UV-photochemical generation of volatile tellurium species and its application for speciation analysis of Te(IV) and Te(VI) in water samples. UV-photochemical generation was carried out in a UV-photoreactor, which consisted of a low-pressure mercury lamp wrapped with a polytetrafluoroethylene reaction coil that served as a reactor. Atomic absorption spectrometry with a continuum source of radiation and high resolution and atomization in a miniature diffusion flame were used to optimize the conditions of generation, which included the composition of the reaction medium, irradiation time and the addition of transition metals as modifiers. In order to achieve a higher sensitivity of determination, the generator was coupled to a triple quadrupole inductively coupled plasma mass spectrometer. Since efficient UV-photochemical generation of volatile species was achieved only from Te(IV), with no response from Te(VI), the feasibility of this technique for simple "non-chromatographic" speciation analysis was tested and a method for determination of Te(IV) and...
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HW platform for surveillance over maritime container transport
Roško, Tomáš ; Možný, Radek (referee) ; Musil, Petr (advisor)
The complexity of international transportation is increasing, and with that, the logistics requirements also increase: such as the need to monitor containers’ location or measure inside conditions. Despite these demands, marine transportation faces specific technical problems, such as the need for sending data precisely, often, and with low energy consumption. This paper aims to create a monitoring device that meets the demands of marine transportation. The device combines satellite and mobile networks to control the container location and, at the same time, allows for precise pinpointing of place and availability of access while having low battery consumption. The theoretical part of the paper explains the process of selecting components and justification of the process with regard to market options. The practical part contains a diagram of the connection of the modules and sensors. Next, the design and manufacture of the printed circuit board and custom 3D printed box are discussed. The software part deals with data protocol and the description of the application, which is then tested with a particular focus on measuring and transmitting the values onto the server.
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Metal-organic networks on graphene surfaces
Kurowská, Anna ; Průša, Stanislav (referee) ; Čechal, Jan (advisor)
Molecular self-assembly is a spontaneous association of molecules and atoms into well-defined supramolecular structures. Understanding this process is key for preparation of structures with atomic precision. This thesis studies the supramolecular structure of tetrakyanochinodimetan molecules (TCNQ) and iron atoms on graphene grown on iridium crystal with the (111) surface. The surface analysis was performed by scanning tunneling microscopy, low-energy electron microscopy and x-ray photoelectron spectroscopy. The thesis introduces the growth process of a good quality graphene on Ir(111) and the synthesis of Fe-TCNQ networks 20 nm x 20 nm large and describes their structural properties. Three preferential orientations of Fe-TCNQ on graphene were identified. The networks will be used in follow-up studies targeting their magnetic properties.
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