National Repository of Grey Literature 15 records found  1 - 10next  jump to record: Search took 0.00 seconds. 
The formation of calcium carbonate polymorphs from concentrated salt solutions
Ševčík, Radek ; Mácová, Petra ; Viani, Alberto
This contribution is demonstrated the preliminary results of the study of the gel phase forming during the synthesis of calcium carbonate's polymorphs. Several samples were collected during the reaction and they were subsequently investigated with instrumental techniques e.g. scanning electron microscopy.
Material analyses of plaster samples of the historical building named “Nové Probošství”, Pražský hrad, nám. sv. Jiří č.p. 34.
Drdácký, Miloš ; Slížková, Zuzana ; Frankeová, Dita ; Hasníková, Hana ; Hauková, Petra ; Koudelková, Veronika ; Kozlovcev, Petr ; Ševčík, Radek ; Wolf, Benjamin
The report contains the results of the material analyses of plasters and stone samples taken from the facades and interior plasters of the historical building named “Nové Probošství” (Pražský hrad, nám. sv. Jiří č.p. 34).). The topic of the study was determination of the chemical composition and the microstructure of historical plasters and renders, sandstone petrography, porosity of materials by means of MIP, water absorption of plasters by tubes, the water content and the moisture distribution in masonry wall, the content and the chemical composition of water-soluble salts in plasters and renders. The results of the study serves as the basis for the future design of the building renovation and the restoration of the artistic elements.\n
Analysis of new renders and masonry damaged by moisture and water-soluble salts
Válek, Jan ; Skružná, Olga ; Ševčík, Radek ; Frankeová, Dita ; Nunes, Cristiana Lara
Research report about the state of new renders of the building Obecní Dvůr, Prague 1. Very high concentration of nitrates in masonry was identified as the reason of their bad state.
Smart Home Control System
Ševčík, Radek ; Fučík, Otto (referee) ; Maršík, Lukáš (advisor)
This bachelor thesis deals with unconventional solutions in the field of home automation systems such as the central unit consisting of a miniature computer. The work includes architecture design, visualisation and control of such system
Helping tool for AVR microcontrollers programming in C language
Ševčík, Radek ; Dřínovský, Jiří (referee) ; Frýza, Tomáš (advisor)
This article describes AVR Wizard programme that was developed for AVR Studio. This software simpliefies microcontrollers (MCUs) programming in a way of general peripheries settings and registers settings for varied MCUs. AVR Wizard is able to generate C language-based MCU main programme structure with chosen settings. User-friendly handling and no longer detailed studies of MCU datasheets are also main advantage.
Analysis of soils
Šašek, Petr ; Viani, Alberto ; Ševčík, Radek ; Mácová, Petra ; Machová, Dita
High concentrations of solid particles in the air may cause health problems. Sources of such particles can be natural processes, as well as human activity (e.g. coal mining, etc). Another source of contamination is the so-called secondary dustiness, which arises from vortex of already settled solids and dispersion into the atmosphere. Secondary dustiness formation is mainly affected by the surface moisture. The increase of humidity leads to agglomeration of the particles, resulting to their falling on ground, thus inhibiting their distribution in the atmosphere. The aim of the study was to analyse the soil dust particles collected on the filters of impactor, with respect to particle size and composition.
Qualitative and quantitative analysis of clay soils
Šašek, Petr ; Viani, Alberto ; Ševčík, Radek ; Fabeš, Roman ; Řehoř, M.
Clay minerals are a group of aluminum silicates with a layered structure, which is formed by tetrahedrally and octahedrally arranged molecules with cations of potassium, magnesium, sodium and others. By combining layers of octahedra and tetrahedra several types of layered structures may be produced, which can form various types of clay minerals in nature. Clay minerals are divided into three main groups: kaolinite, smectite and illite. The aim of the study was to qualitatively and quantitatively analyse the clay minerals in soil samples; the main objective was to determine the phase transition on the boundary of smectite and illite phases. For this purpose XRD analysis with Rietveld refinement was employed.
The determination of material characteristics of natural and artificial stone samples from Marian Column at Hradčany Square in Prague
Slížková, Zuzana ; Zeman, Antonín ; Petráňová, Veronika ; Viani, Alberto ; Pérez-Estébanez, Marta ; Frankeová, Dita ; Ševčík, Radek ; Mácová, Petra ; Janotová, Dana ; Hasníková, Hana ; Niedoba, Krzysztof ; Hauková, Petra
Within the survey before restoration intervention material properties of natural and artificial stones that are part of the Marian Column at Hradcany Square in Prague were determined. 15 samples were subjected to extensive instrumental analysis, whose output is not only chemical and mineralogical composition of the samples, but also the degree of degradation including a description of the porous system and the level of salinity.
Determination of developers in samples from Filmové laboratoře Barrandov
Ševčík, Radek ; Mácová, Petra
This report is dealing with the determination of color and monochrome developers. The content of developers were studied with infrared spectrometer (FTIR) in the form of KBr pellets in the transmission mode and as powder from the water extracts in the Attenuated Total Reflectance (ATR) mode as well.
Determination of sulphites and thiosulphates in samples from Filmové laboratoře Barrandov
Ševčík, Radek ; Neuwirthová, Miluše
The report is focused on the analysis of samples from Filmové laboratoře Barrandov. Contents of sulphites and thiosulphates were determined by used of titration methods in water extracts of these building materials.

National Repository of Grey Literature : 15 records found   1 - 10next  jump to record:
See also: similar author names
9 ŠEVČÍK, Radek
4 ŠEVČÍK, Richard
4 ŠEVČÍK, Richard
2 Ševčík, Radim
3 Ševčík, Roman
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