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The control unit of the door systems for public transport
Jablončík, Lukáš ; Vlachová Hutová, Eliška (referee) ; Friedl, Martin (advisor)
The topic of my bachelor´s thesis is to design a control unit of the door systems for public transport. The control unit is designed by using modern components. Their availability should be not less then ten years. The unit is controlled by a microcontroller ATMEGA and the motor is switched using the h-bridge. The control unit has ten programmable inputs and two switching outputs. PCB design is optimized for mass production. The result is a functional prototype of control unit.
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Study of the Selected Types of Sulphur Compounds in Beer and Brewing Materials
Mikulíková, Renata ; Ventura, Karel (referee) ; Ventura, Karel (referee) ; Čáslavský, Josef (referee) ; Márová, Ivana (advisor)
Much attention has been recently devoted to sensorially active substances affecting beer quality in the Czech Republic and worldwide. Among them, the heterocyclic and sulphur containing compounds play an important role, some of them with high sensorial activity even in extremely low concentrations. Trace amounts of these compounds, which can be frequently found in foods, participate in formation of their aroma and this effect can be generally evaluated as favorable However, in malt or beer it is true only to a limited extent and the presence of heterocyclic and sulphur containing compounds are in this respect assessed rather unfavorably. The aim of the present study was to provide a survey about of problems in the field of sulphur containing compounds in barley, malt and beer, to describe metabolic paths leading to their formation and to verify experimentally possibilities of their determination using modern analytical methods. Sulphur-containing amino acids are a natural part of barley, malt and beer and are precursors of the origin of volatile sulphur substances. The most frequently occurring sulphur amino acids, metionine, cysteine and homocysteine, were selected for analytical monitoring. The method of gas chromatography was used to determine sulphur-containing amino acids in barley, malt and beer. Prior to the analysis, sulphur-containing amino acids were derived and volatile N(O,S)-ethoxycarbonyl propyl esters were formed; they were subsequently analyzed using the gas chromatography with mass detector (GC/ MSD) and the gas chromatography with flame photo detector (GC/ FPD). Direct analysis of sulphur volatile substances is possible only rarely as they are found in the analyzed matrices (malt, beer) only in very low concentrations ( g/kg,l - ng/kg,l). Before the analysis, the analytes must be extracted from the matrix and concentrated. The modern analytical methods SPME (Solid Phase Micro Extraction), SPDE (Solid Phase Dynamic Extraction) and TDAS (Thermal Desorption Autosampler) were experimentally compared for the extraction and subsequent concentration of sulphur volatile substances. The method of gas chromatography with flame photo detector was used to determine sulphur volatile substances. Following volatile sulphur substances were monitored: dimethyl sulphide, dimethyl disulphide, dimethyl trisulphide, carbon disulphide, ethyl sulphide, diethyl disulphide, methionol, 3-methylthiophen, ethyl thioacetate, 2-methyl-1-buthanthiol. Only metionine was detected in significant amounts in the barley samples analyzed. Not only content but also dependence on a variety and locality were studied. Further, changes in methionine, cysteine and PDMS content during malting were followed. Results proved a significant decline in these substances content depending on the kilning temperature. Three types of fibers were tested for the analyses of the selected volatile sulphur substances in beer in the SPME method. PEG - a fiber with stationary phase Carbowax, PDMS - a fiber with stationary phase polydimethylsiloxan and a combined fiber CAR/PDMS - Carboxen and polydimethylsiloxan. Carbon disulphide, methionol, dimethyl sulphide, 3-methylthiophen and diethyl disulphide were detected with this method. Content of the other analyzed volatile sulphur substances was below the limit of detection. Further was tested usage the SPDE and TDAS methods. Both methods appear to be the suitable for the determination of volatile sulphur substances in beer.
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Automatic scheduling, execution and monitoring of computational workflows on distributed systems
Jaroš, Marta ; Corbalan Gonzales, Julita (referee) ; Martinovič, Jan (referee) ; Jaroš, Jiří (advisor)
Rutinní automatizované vykonávání složitých výpočetních procesů, tzv. workflows, se stalo naprosto klíčovým pro dosažení vysoké produktivity v různých oblastech vědy a výzkumu. Výpočetní workflows se v posledních několika letech staly důležitou abstrakcí mnoha reálných procesů a jevů, jako např. digitálních dvojčat, personalizované medicíny či na simulaci založené vědě obecně. Vykonání workflow lze vnímat jako orchestraci mnoha úloh s různými výpočetními požadavky a vzájemnými závislostmi. Vzhledem k výpočetní složitosti reálných workflows je jejich provádění možné pouze na výpočetních klastrech nebo v cloudu, kde hraje efektivní plánování a optimalizace provedení workflows klíčovou roli. Hlavním cílem této práce je umožnit automatizované a spolehlivé vykonání výpočetních workflows. Tyto workflows se často skládají z distribuovaných úloh, které jsou schopny běžet na několika výpočetních prostředcích najednou, dokonce umožňují toto množství měnit. Anglicky se tyto úlohy nazývají moldable tasks. Množství přiřazených prostředků ovlivňuje jak dobu vykonání workflow, tak i cenu výpočtu, ovšem ne stejnou měrou díky rozdílné výpočetní efektivitě. Proto tato práce zkoumá různé přístupy k plánování a optimalizaci vykonání workflows, převážně se zabývá optimalizačními technikami založenými na genetických algoritmech. Práce představuje tři optimalizační přístupy zkoumající dynamicky i staticky přidělované výpočetních zdroje. V procesu optimalizace hraje důležitou roli výkonnostní databáze, která je průběžně vytvářena a jejíž úlohou je uchovávat paralelní škálování prováděných úloh při různých vstupech. Řídkost a neúplnost výkonnostní databáze je řešena různými interpolačními metodami. Navrhované přístupy vykazují lepší využití výpočetních prostředků a umožňují prioritizaci různých optimalizačních kritérií, např. doby provádění workflow či ceny výpočtu. Finální implementace byla experimentálně ověřena na reálných workflows vykonávaných na klastrech v národním superpočítačovém centru IT4Innovations. Tato práce rovněž představuje návrh a implementaci komplexního systému pro automatické plánování, vykonávání a monitorování workflows na výpočetních klastrech. Systém rovněž disponuje dalšími funkcemi jako jsou účtování, reportování či odolnost vůči chybám. Tento systém, zvaný k-Dispatch, byl úspěšně komercializován v oblasti ultrazvukové neurostimulace a je nabízen společností Brainbox, Ltd.
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Nanostructures for advanced plasmonic applications
Kejík, Lukáš ; Brzobohatý,, Oto (referee) ; Dostálek,, Jakub (referee) ; Šikola, Tomáš (advisor)
Plazmonika, charakterizovaná spojením oscilací volných elektronů v kovech s elektromagnetickými vlnami, se dostala do popředí s pokroky v nanotechnologiích. Tato synergie vede k pozoruhodným vlastnostem objektů v nanoměřítku, vyznačujících se lokalizovaným a zesíleným elektromagnetickým polem. Tyto vlastnosti umožňují širokou škálu aplikací nanostruktur, zahrnujících biodetekci, zesilování emise, získávání solární energie a náhrazování optických komponent. Tato dizertační práce je zaměřena na aplikace plazmonických nanostruktur, primárně na plošné optické komponenty známé jako metapovrchy. Kromě toho zkoumá jejich použití ve fotokatalytických aplikacích, využívajících energetické horké nosiče náboje generované prostřednictvím plazmoniky. Dizertační práce začíná úvodem do teoretických základů plazmoniky, zdůrazněním klíčových parametrů řídících plazmonické vlastnosti a přehledem jejích nejpřesvědčivějších aplikací. Následně obsahuje čtyři experimentální části, které ukazují využití plazmonických nanostruktur pro různé účely, včetně ovládání fáze světla, dynamických metapovrchů, zkoumání efektů vnitřní krystalinity a využití horkých nosičů náboje ve fotoelektrochemických systémech. Tyto studie spojuje využití pokročilých nebo méně konvenčních materiálů, jako je oxid vanadičný nebo dichalkogenidy přechodných kovů, v oblasti plazmoniky a nanotechnologií.
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Commented Translation of Technical Text
Mičková, Daniela ; Kotásek, Miroslav (referee) ; Langerová, Petra (advisor)
Tato bakalářská práce se zaměřuje na překlad učebního textu z oblasti elektrotechniky. Práce má za cíl přeložit a analyzovat odborný učební text a je rozdělena na tři hlavní části. V teoretické části je uvedena zejména charakteristika odborného a učebního stylu, typy překladatelských postupů, překladatelské transformace a funkční perspektiva větná. Praktická část předkládá anglický překlad úryvku ze skript a analytická část má za cíl analyzovat problémy, které se vyskytly při překladu a zhodnotit charakteristické znaky odborného učebního stylu založené na analýze tohoto překladu.
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The History and Activities of the Town and Country Planning Department of The Ressearch Institute for Building and Architecture in Brno
Žáčková, Markéta ; Chatrný, Jindřich (referee) ; Ing.arch.Igor Kovačevič, Ph.D. (referee) ; Doležel, Karel (referee) ; Koutný, Jan (advisor)
The dissertation explores the history and activities of the Brno-located Town and Country Planning Department of The Research Institute for Building and Architecture (RIBA) since its foundation in 1954 until its abolishment in 1994. As a part of the department functioning, a description of its main research tasks and publications, which had played an essential part while formulating theory and methodology of urban planning after the 2nd World War in Czechoslovakia, are introduced. Special attention is paid to tasks and publications whose authors and research workers applied interdisciplinary approaches and – in spite of the prevailing totalitarian regime – managed to apply their experience acquired abroad to produce highly influential works such as The Principles and Rules of Spatial Planning. Another objective of the dissertation is the creation of a complex bibliography of texts that were produced by the department (books, reports on the outcomes of research tasks that had been explored at the Town and Country Planning Department and that were released internally as handbooks serving research workers of the institute and other institutions focusing on building and architecture). Depictions of the Brno department of RIBA from the perspective of two of its significant representatives who have outlived the institution they had witnessed to be founded and to the functioning of which they had significantly contributed, become a key part of the text: Ing. arch. Vladimír Matoušek, CSc., the second head of the Town and Country Planning Department of RIBA and Ing. arch. Dušan Riedl, CSc., a theoretician of architecture and urban planning and a top expert on Czech national herritage. As the topic has not yet been subjected to scholarly research, the main objective of the work is to create the very first complex text on the Brno department of RIBA and its activities. The circumstances surrounding the constitution of RIBA in the context of other similarly functioning research institutes are pursued with a special focus on the fields of building, architecture and urban planning as well as legislative embedding of its foundation and functioning, its organization structure, staff, definition of taskmasters and the way the tasks were approached, relations to other institutions in the field, publishing activities and transfer of theoretical research outcomes to practice. The text also deals with the state of present-day research of architecture and urban planning. Archive material and publications released by the institute represent a predominant source of information about RIBA activities. They are now stored at the archive of ABF Foundation in Prague (the foundation has been administering both the archive and library of the Prague department of RIBA since its abolishment), at the library of The Institute for Spatial Development in Brno (the institute administers the library of the former Brno department) and at the Moravian Land Archive in Brno. Both of the archives have been thoroughly researched by the author. Critical reflections upon the urban-planning department of RIBA occurring in contemporary publications and periodicals are another important source of information which help to specify the character of its activities (recent literature mentions RIBA scarcely, a complex evaluation is still missing). Oral history reported by former employees of RIBA, who had contributed to the first-rate quality of its research activities.
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Creation of Knowledge Database for Lighting Technology with the Possibility of Expert Query Processing
Krbal, Michal ; Sokanský, Karel (referee) ; Gašparovský, Dionýz (referee) ; Baxant, Petr (advisor)
This presented thesis is focused on the complex description of creation the database system for the lighting. The important static and dynamic parameters of light sources and luminaires are listed in the first part of thesis. These parameters are complemented by the measured values and their relationships. The next chapters of thesis are focused to description of obtained parameters, structural design, historical and expected development of individual representatives of light sources. In the following sections are described current state of used data formats of luminaires and the possibilities for describing of light sources. The database systems are created as a result of this thesis. These databases are used for collecting, sorting, searching and sophisticate comparison of the parameters of light sources and luminaires.
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Pressure Sensors Based on Modern Nanotechnologies
Magát, Martin ; Hudec, Lubomír (referee) ; Vlach, Radek (referee) ; Vrba, Radimír (advisor)
This thesis describes utilization of a nanotechnology in new pressure sensors. Detailed analysis of individual principles are carrying on. And simulations and experimental models of sensors are developed. More detailed description is provided for new capacitive pressure sensor, which is manufactured using nanotechnology, including its model and analysis in order to improve its properties. The work deals with the emission pressure sensor which uses the principle of cold emissions, including analysis comparison of the measured values of the emission current from the applied nanotubes field and analysis to improve emissions performance.
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Reliability assessment of a hydraulic switchboard production proces
Machová, Lenka ; Maradová, Karla (referee) ; Blecha, Petr (advisor)
The Diploma thesis is focused on possibilities of an assessment of a hydraulic switchboard and its manufacturing process. Furthermore, it analyses methods individually which are suitable for quality assurance and production reliability, which are described in details. The follow-up work focuses more on the Statistical Process Control (SPC) method which is applicable in the early warning system and the Failure mode, effects, and criticality analysis (FMECA) method, applicable in the planning system. These two methods are further applied to the newly introduced process of machining the hydraulic switchboard as an effective tool not only for assessing the reliability of production, but also for its subsequent securing and maintaining in a relevant condition.
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Sensitivity analysis of costs on power outages resulting from nonadherence of custom - tailored standards of the continuity of power supply
Polák, Jiří ; Skala, Petr (referee) ; Blažek, Vladimír (advisor)
The goal of the thesis is to describe the approaches used for the regulation of the continuous supply of electric power in the selected countries of European Union and to determine the power outages costs in the specific distribution network, resulting from non-observance of the customer standards used in Great Britain, Sweden and Finland. The costs have been calculated for the entire network, as well as for the individual outputs. The thesis carries out the sensitivity analysis of the power outages costs, resulting from the breaching the supply restoration standards and the multiple interruptions standard used in the Great Britain. The costs of the individual limits are shown in the tables and the graphs. The comparison of the individual outputs according to the height of the penalty costs have been carried out on the selected set of limits. The comparison of the order of the individual outputs is then carried out for the customer standards used in Great Britain, Sweden and Finland.
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