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The influence of different anions on fixation of Cu in alkali-activated blast furnace slag
Böhm, Petr ; Kotrla, Jan (referee) ; Koplík, Jan (advisor)
The work deals with the fixation of copper in alkali activated blast furnace slag and with the influence of anionts (sulphate, nitrate, chloride and oxide) to its immobilization. This is tested according to leaching tests ČSN EN – 12457 4. The concentration of copper in leachates was determined by inductively coupled plasma optical emission spectrometry. The aim of this work is to check the influence of addition (copper) to the resulting mechanical properties and also specify, how the heavy metal is bonded in the matrix. The structure was examined by scanning electron microscopy.
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Alumina based refractories for noncement application
Böhm, Petr ; Dlabajová, Lucie (referee) ; Švec, Jiří (advisor)
The thesis deals with the possibility of bonding the ceramic mixture by a sol-gel method, Colloidal alumina was used as the sol and the gelation was performed by changing the ionic strength or pH. The influence of different gelling agents (NaCl, NH4Cl, NH3, MgO a CO(NH)) on the gellation time and on the course of the gelation was compared. The aim of the work is the preparation of refractory monolith with the highest packing desity possible, which was solved by modeling the granulometric curve of the solid part of the ceramic mixture based on alumina. The thesis also describes the behavior of prepared gels during thermal processing of ceramics. Subsequently the resulting structure of prepared ceramic bodies was monitored.
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Alumina based refractories for noncement application
Böhm, Petr ; Dlabajová, Lucie (referee) ; Švec, Jiří (advisor)
The thesis deals with the possibility of bonding the ceramic mixture by a sol-gel method, Colloidal alumina was used as the sol and the gelation was performed by changing the ionic strength or pH. The influence of different gelling agents (NaCl, NH4Cl, NH3, MgO a CO(NH)) on the gellation time and on the course of the gelation was compared. The aim of the work is the preparation of refractory monolith with the highest packing desity possible, which was solved by modeling the granulometric curve of the solid part of the ceramic mixture based on alumina. The thesis also describes the behavior of prepared gels during thermal processing of ceramics. Subsequently the resulting structure of prepared ceramic bodies was monitored.
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The influence of different anions on fixation of Cu in alkali-activated blast furnace slag
Böhm, Petr ; Kotrla, Jan (referee) ; Koplík, Jan (advisor)
The work deals with the fixation of copper in alkali activated blast furnace slag and with the influence of anionts (sulphate, nitrate, chloride and oxide) to its immobilization. This is tested according to leaching tests ČSN EN – 12457 4. The concentration of copper in leachates was determined by inductively coupled plasma optical emission spectrometry. The aim of this work is to check the influence of addition (copper) to the resulting mechanical properties and also specify, how the heavy metal is bonded in the matrix. The structure was examined by scanning electron microscopy.
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Volatility of Euro: Trends and Modelling
Böhm, Petr ; Hanousek, Jan (referee) ; Kočenda, Evžen (advisor)
The main objective of this work is to model volatility of Euro to Czech Koruna exchange rate between 1.1.1999 and 30.12.2005 and investigate changes in its behaviour. In order to achieve this we search for structural breaks in exchange rate time series. We model the conditional variance with ARCH model (autoregressive conditional heteroscedasticity) between particular break points. Our findings are that since year 2002 volatility of Euro to Koruna exchange rate has been decreasing. This conclusion is confirmed by measuring historic volatility by using month average and daily observations. This may has been caused by changing monetary policy, more precisely by adopting new regime of maintaining monetary stability - implicit inflation targeting.
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Use of brownfields as a part of potential in rural areas
BÖHM, Petr
This thesis deals with the definitions of rural development, rural areas, brownfields, greenfields. In the practical part compares two real locations in South County. Greenfield site is located in the village in the district Vidov Czech Budejovice and borwnfield site is located in the village in the district Želeč Tabor. Both locations are assessed according to the model of South Bohemia, which is based on studies němcekého Ministry of Environment. This model consists zetří criteria - potential sites in terms of community benefit in terms of potential investor and the change in the value space - public interest in the regeneration of brownfield sites. These three criteria are still my sub, under which then determines the significance of the site. Then, by calculating the preference index (PI) to determine which location is more suitable for implementation.
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Data Acquisition System and Data Processing for the New Thomson Scattering System on the COMPASS Tokamak
Aftanas, Milan ; Bílková, Petra ; Böhm, Petr ; Weinzettl, Vladimír ; Stöckel, Jan ; Hron, Martin ; Pánek, Radomír ; Scannell, R. ; Walsh, M.
The Thomson scattering (TS) will be one of crucial plasma diagnostics of the COMPASS tokamak. This newly build-up multi-point system consists of two Nd:YAG lasers (1.6J at 1064nm, 30Hz each) and cascade filter polychromators with avalanche photodiodes. It will enable measurements of both the electron temperature Te (20eV − 5000eV ) and density ne (1019 − 1020m−3) profiles with spatial resolution up to 3mm in the vertical direction in 56 spatial points. The uniquely designed complex data acquisition system based on fast analog digital convertors (1GS/s) reflects the need to retrieve/digitize the signal originated from scattering process of the laser pulse lasting less than 10ns. This paper presents a detailed review of the architecture of the control and the data acquisition (DAQ) system and its features. LabViewr will be used as a main layer for the TS data acquisition. Routines specifically written for controlling the DAQ of TS on COMPASS are presented.
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