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Hydrogen quantification by electron spectroscopy
Endstrasser, Zdeněk ; Polčák, Josef (referee) ; Čechal, Jan (advisor)
The absence of hydrogen in the photoelectron spectrum remains one of the greatest limitations of X-ray photoelectron spectroscopy. The main aim of this work is therefore to determine the concentration of hydrogen atoms in the near surface region of a sample. The REELS electron spectroscopic method based on quasi-elastic electron scattering is used for this purpose. The choice of this method was given mainly by the fact that the photoelectron spectrometers has an electron source in the basic equipment, so there is no requirement to purchase additional equipment. In our case, measurements were realized using the AXIS Supra photoelectron spectrometer in CEITEC laboratories. We were primarily focused on the study of polymer samples in this work. The gus cluster ion source was used for sputter cleaning of the sample surface. Then the XPS and REELS measurements were performed on such cleaned samples. The obtained data were subsequently evaluated, and the results discussed. The most important output of this work was to develop the methodology of detection and quantification of hydrogen atoms. However, the theoretical description of the methods used, and the appreciation of critical aspects associated with the use of the REELS method are also embraced. In particular, the effect of sample charging and electron dose on measurement results is discussed.
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Thermal Insulation of Apartment Buildings: Decision-making Process and Effect on Energy Savings
Častorálová, Lucie ; Ščasný, Milan (advisor) ; Chytilová, Julie (referee)
Thermal Insulation of Apartment Buildings: Decision-making Process and Effect on Energy Savings Abstract In order to lower the emissions of green-house gases it is necessary to explore the wide range of the energy efficiency options. This thesis attempts to analyse the effect of thermal insulation installed in the multi-family apartment buildings during the period of 2006-2012 in the Czech Republic. We also investigate whether providing governmental funding further improves energy performance of the insulated apartment buildings. In addition, we examine the collective decision-making processes of members of the multi-family apartment building associations, including their attitudes towards thermal insulation of their houses. The basis of this thesis is the econometric panel data model (with 45 apartment buildings and their energy consumption before and after the insulation) evaluated by the fixed effects method with cluster confirming that the insulation, investments and public funding had all significant and negative impact on the energy consumption in the buildings, when energy consumption was adjusted for weather conditions. After the analysis it was concluded that the more the owners invest in thermal insulation, the more they will save in the long run. The governmental funding led to even greater...
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Hydrogen quantification by electron spectroscopy
Endstrasser, Zdeněk ; Polčák, Josef (referee) ; Čechal, Jan (advisor)
The absence of hydrogen in the photoelectron spectrum remains one of the greatest limitations of X-ray photoelectron spectroscopy. The main aim of this work is therefore to determine the concentration of hydrogen atoms in the near surface region of a sample. The REELS electron spectroscopic method based on quasi-elastic electron scattering is used for this purpose. The choice of this method was given mainly by the fact that the photoelectron spectrometers has an electron source in the basic equipment, so there is no requirement to purchase additional equipment. In our case, measurements were realized using the AXIS Supra photoelectron spectrometer in CEITEC laboratories. We were primarily focused on the study of polymer samples in this work. The gus cluster ion source was used for sputter cleaning of the sample surface. Then the XPS and REELS measurements were performed on such cleaned samples. The obtained data were subsequently evaluated, and the results discussed. The most important output of this work was to develop the methodology of detection and quantification of hydrogen atoms. However, the theoretical description of the methods used, and the appreciation of critical aspects associated with the use of the REELS method are also embraced. In particular, the effect of sample charging and electron dose on measurement results is discussed.
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Thermal Insulation of Apartment Buildings: Decision-making Process and Effect on Energy Savings
Častorálová, Lucie ; Ščasný, Milan (advisor) ; Chytilová, Julie (referee)
Thermal Insulation of Apartment Buildings: Decision-making Process and Effect on Energy Savings Abstract In order to lower the emissions of green-house gases it is necessary to explore the wide range of the energy efficiency options. This thesis attempts to analyse the effect of thermal insulation installed in the multi-family apartment buildings during the period of 2006-2012 in the Czech Republic. We also investigate whether providing governmental funding further improves energy performance of the insulated apartment buildings. In addition, we examine the collective decision-making processes of members of the multi-family apartment building associations, including their attitudes towards thermal insulation of their houses. The basis of this thesis is the econometric panel data model (with 45 apartment buildings and their energy consumption before and after the insulation) evaluated by the fixed effects method with cluster confirming that the insulation, investments and public funding had all significant and negative impact on the energy consumption in the buildings, when energy consumption was adjusted for weather conditions. After the analysis it was concluded that the more the owners invest in thermal insulation, the more they will save in the long run. The governmental funding led to even greater...
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