National Repository of Grey Literature 84 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
The development of algorithmic thinking in elementary school pupils using the SCRATCH programming tool
Svoboda, Milan ; Černochová, Miroslava (advisor) ; Vaňková, Petra (referee)
The diploma thesis deals with problems of algorithmization and programming at elementary schools. It examines the influence of teaching the basics of programming in Scratch on the development of pupils' algorithmic thinking and their ability to develop logical thinking and problem solving. The theoretical part deals with the definition of related concepts and the relation of programming to the key competencies defined by the RVP ZV. The practical part evaluates the experience with the teaching of pupils of the 5th and 6th grades of elementary school within the pedagogical experiment, whose aim was to study the influence of teaching with the use of the visual programming language Scratch on the development of pupils' algorithmic thinking.
Nehomogenita mikrostruktury a creep ECAP hliníku
Sklenička, Václav ; Král, Petr ; Ilucová, Lucia ; Saxl, Ivan ; Dvořák, Jiří ; Svoboda, Milan
High purity (99.99%) pure aluminium processed by equal channel angular pressing (ECAP) was examined in terms of the ECAP microstructure inhomogeneity and its creep behaviour. The results indicate that an inhomogeneity of the ECAP microstructure in mesoscopic scale may influence the creep behaviour of the pressed material.
Arsenic speciation analysis by hydride generation - cryotrapping - gas chromatography - atomic absorption spectrometry
Petreňová, Štěpánka ; Svoboda, Milan (advisor) ; Šucmanová, Marcela (referee)
EN The thesis is focused on a speciation analysis of arsenic with use of the hydride generation - cryotrapping - gas chromatography - atomic absorption spectrometry. The aim of this project was the development of a method and instrumentation of the speciation analysis of arsenic based on combination of selective generation of substituted hydrides with a detection by atomic absorption spectrometry and with use of the cryotrapping of generated arsenic species and their separation by the gas chromatography. In the first part of this work the effects of individual parameters which influence the separation in the gas chromatograph were studied. Especially, time of injection from the cryotrap into GC, temperature program, carrier gas flow and carrier gas flow through a "deanswitch". Optimization of these parameters is an attempt to achieve a satisfactory resolution of the individual peaks of arsenic species separated by gas chromatography. Furthermore, an adequate sensitivity of this method is required to be achieved in comparison to other methods that use AAS detection such as a combination of hydride generation with cryotrapping. For this reason, the detection limits and the quantification of arsenic species were important to be determined as well. A sampling coil was replaced by a sampling tip...
Characterization of Mo-B-C nanostructured coating microstructure by means of AEM and GDOES
Buršík, Jiří ; Svoboda, Milan ; Švábenská, Eva ; Buršíková, V. ; Souček, P. ; Zábranský, L. ; Vašina, P.
A Mo-B-C nanostructured coating was prepared on WC-Co hard-metal substrate by magnetron sputtering. The details of microstructure of deposited thin layer as well as elements redistribution caused by subsequent annealing at 1000°C were studied by several experimental techniquec.
Chemical and microstructural characterization of the render, sampled from the Garden wall of the US Embassy in Prague 1
Slížková, Zuzana ; Frankeová, Dita ; Viani, Alberto ; Hauková, Petra ; Koudelková, Veronika ; Svoboda, Milan
The aim of the work was to analyze the mortar taken from the Garden wall (US Embassy, Prague 1). Analyzes were performed for the binder and filler characterization and the sample was also dissolved in HCl to determine the mixing ratio.
Chemical and microstructural characterization of the render, sampled from Gloriette, the US Embassy in Prague 1
Slížková, Zuzana ; Frankeová, Dita ; Viani, Alberto ; Hauková, Petra ; Koudelková, Veronika ; Svoboda, Milan
The aim of the work was to analyze the mortar taken from the Gloriette (US Embassy, Prague 1). Analyzes were performed for the binder and filler characterization and the sample was also dissolved in HCl to determine the mixing ratio.
Hydride generation study for arsenic speciation analysis with AAS and AFS detection
Svoboda, Milan ; Dědina, Jiří (advisor) ; Spěváčková, Věra (referee) ; Komárek, Josef (referee)
The general aim of this work was a development of methodology and instrumentation for speciation analysis based on the combination of the selective generation of substituted hydrides with atomic absorption or atomic fluorescence spectrometry detection. The first topic of this work was the development of methodology and instrumentation for arsenic speciation analysis based on selective generation of substituted arsines with trapping in the cryogenic trap (U-tube packed with chromosorb) with AAS detection (HG- CT-AAS). The conditions of the selective hydride generation approach as well as working procedure of the cryogenic trap were optimized (appropriate approach for hydride generation, set up of heating program of cryogenic trap, new dryer - cartidge with NaOH, elimination of unspecific absorption, decreasing of the detection limits). The second important part of the work lay in applying of the developed method for arsenic speciation analysis in a homogenized mouse liver tissue. The direct slurry sampling to hydride generator was develop. Moreover the information about oxidation state (iAsIII,V , MAsIII,V a DMAsIII,V ) was obtain. The effect of relevant experimental parameters such as tetrahydroborate concentration, TRIS buffer concentration and time of pre-reduction of the samples by L-cysteine...
Hydride generation study for arsenic speciation analysis with AAS and AFS detection
Svoboda, Milan
The general aim of this work was a development of methodology and instrumentation for speciation analysis based on the combination of the selective generation of substituted hydrides with atomic absorption or atomic fluorescence spectrometry detection. The first topic of this work was the development of methodology and instrumentation for arsenic speciation analysis based on selective generation of substituted arsines with trapping in the cryogenic trap (U-tube packed with chromosorb) with AAS detection (HG- CT-AAS). The conditions of the selective hydride generation approach as well as working procedure of the cryogenic trap were optimized (appropriate approach for hydride generation, set up of heating program of cryogenic trap, new dryer - cartidge with NaOH, elimination of unspecific absorption, decreasing of the detection limits). The second important part of the work lay in applying of the developed method for arsenic speciation analysis in a homogenized mouse liver tissue. The direct slurry sampling to hydride generator was develop. Moreover the information about oxidation state (iAsIII,V , MAsIII,V a DMAsIII,V ) was obtain. The effect of relevant experimental parameters such as tetrahydroborate concentration, TRIS buffer concentration and time of pre-reduction of the samples by L-cysteine...

National Repository of Grey Literature : 84 records found   1 - 10nextend  jump to record:
See also: similar author names
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