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Preparation and characterization of concretes based on blended geopolymeric binder
Bulejko, Pavel ; Straka, Radek (referee) ; Šoukal, František (advisor)
This bachelor thesis focuses on preparation of concretes based on alkali activated binding systems (geopolymers). Finely ground blast-furnace slag was used as a basic aluminosilicate compound for preparation of an alkali activated binder. A mixture of sodium water glass and 50 % KOH solution, which was replaced by cement kiln dust in some cases, was used as an activator. The prepared testing samples (columns 40x40x160 mm) were mechanically tested for strength and the influence of the substitution of KOH solution by cement kiln dust on strength was observed. Then the work aims at structure analysis of binders prepared – the thermal analysis was carried out and the phase composition was explored with RTG diffraction.
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Design of optoelectronic positional sensor
Straka, Radomír ; Nováček, Zdeněk (referee) ; Puskely, Jan (advisor)
The aim of this semestral work is design optoelectronic positional sensor, which can measure current position of measuring line. This position has to be measure very precisely. At first the work describes positional sensors used in automatization. Work study parameters of resistance, inductance, capacity, optoelectronic and ultrasound sensors. Subsequently work choose integrated optoelectronic sensor ADNS-5020, realize with ADNS-5020 circuit for measuring position and realize part processing transmission of signal from sensor to PC with integrated circuit FT232RL. The results of this work are design measuring and transfering circuit for optoelectronic positional sensor, measuring program which have control over designed circuit. Measuring program process measured data of voltage possibly current distribution on the line and create tables and graphs with calculation reflection coefficient and impedance from data.
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Study of usabiliti of sands for preparation of aeroconcrete in hydrotermal condition
Straka, Radek ; Ptáček, Petr (referee) ; Opravil, Tomáš (advisor)
A building industry is expanding branch all the time and it intervenes in the life of everyone. Aeroconcrete is very attractive and actual subject nowadays because economy is important point of view of production. This material finds a wide-spread use thanks to its specific properties. The good manipulation and great thermal insulating properties are secured by its porous structure. Furthermore, proper material selection provides a saving of power of house for every customer demands. Due to aeroconcrete's sufficient compressive strength it is useful for both constructions and internal walls. Fundamental and very important for final material properties is raw material composition of aeroconcrete. A relationship between composition of filler (quartz sand) and resultant properties of aeroconcrete is an objective of the thesis.
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Hints for Inorganic Chemistry Tests E-learning Study Materials Processing
Straka, Radek ; Kábelová, Božena (referee) ; Richtera, Lukáš (advisor)
E-learning is an educational way which uses multimedia and communication technologies for making, transferring and offering materials for studying. The aim of this bachelor thesis is making educational materials using the form of hints for inorganic chemistry tests. The first year students come into the contact with these tests compulsorily in the Inorganic chemistry laboratories II on Faculty of chemistry of Brno University of technology. The thesis contains six parts. First five parts are set to general view of e-learning and last sixth part obtains chosen hints for inorganic chemistry tests. Next hints are appended on CD for its considerable size (cca 600 hints).
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RFID bus-stop identifacation for sightless people
Straka, Radomír ; Zamazal,, Michal (referee) ; Dušek, Martin (advisor)
The aim of this master’s thesis is to design a device for identification of bus stops for blind people. In the beginning the work describes information about the RFID system, characterizes each part of this system, mutual communication of its components and evaluates possibilities of RFID communication frequency bands. Subsequently the work describes the block diagram of the device and the circuit scheme of each block. Work concentrates on a selection of circuit components for the RFID transceiver, the voice module, the control module and choose a suitable transponder to place it on metal constructions. Control programs are also described. PCB design of each board, partlists and source codes are in the appendices of this master’s thesis.
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Modelling of Dynamic Games with Imperfect Information
Straka, Richard ; Smrčka, Aleš (referee) ; Hrubý, Martin (advisor)
This work concentrates on the study of dynamic games; in particular games with imperfect information, implementation of a model and experimentation with the model. The game DarkElf was chosen for this project. It is a strategic, turn based game with economic and military features, where the decisions made by players are simultaneously implemented at a predetermined time.
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Optimization of internal ambient air quality in libraries and archives aimed at reduction of degradation of library and archival materials
Součková, Magda ; Vávrová, Petra ; Novotný, Jan, ; Dřevíkovská, Jana ; Paulusová, Hana ; Bartl, Benjamin ; Bartlová, Lenka ; Bacílková, Bronislava, ; Straka, Roman ; Ďurovič, Michal, ; Mašková, Ludmila ; Smolík, Jiří
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Modelling of Dynamic Games with Imperfect Information
Straka, Richard ; Smrčka, Aleš (referee) ; Hrubý, Martin (advisor)
This work concentrates on the study of dynamic games; in particular games with imperfect information, implementation of a model and experimentation with the model. The game DarkElf was chosen for this project. It is a strategic, turn based game with economic and military features, where the decisions made by players are simultaneously implemented at a predetermined time.
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Design of optoelectronic positional sensor
Straka, Radomír ; Nováček, Zdeněk (referee) ; Puskely, Jan (advisor)
The aim of this semestral work is design optoelectronic positional sensor, which can measure current position of measuring line. This position has to be measure very precisely. At first the work describes positional sensors used in automatization. Work study parameters of resistance, inductance, capacity, optoelectronic and ultrasound sensors. Subsequently work choose integrated optoelectronic sensor ADNS-5020, realize with ADNS-5020 circuit for measuring position and realize part processing transmission of signal from sensor to PC with integrated circuit FT232RL. The results of this work are design measuring and transfering circuit for optoelectronic positional sensor, measuring program which have control over designed circuit. Measuring program process measured data of voltage possibly current distribution on the line and create tables and graphs with calculation reflection coefficient and impedance from data.
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