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Natural regeneration of spruce stands in Vysoké Tatry (High Tatras) after large scale disturbation
Michalová, Zuzana ; Weiser, Martin (advisor) ; Wild, Jan (referee)
The observational study on natural regeneration of Norway spruce (Picea abies) was provided during seasons 2010 and 2011 in the windthrow area of High Tatra National Park. The main aim of this master thesis was to describe the distribution pattern in Norway spruce regeneration as well as to estimate the spatial scale, which most preciselly describes the differences in its phenotypic variability. Following step was to determine the relative influence of abiotic and stand factors on the growth characteristics and abundance of spruce seedlings. The Main focus lied on stressing the role of biotic interactions, like intraspecific and interspecific competition, leading to certain discrepancies in the phenotype, as well as in abundance of spruce seedlings.The reponse in variability in spruce traits was recognized at each spatial level. The results showed clear causality between soil moisture and vegetation composition, which both directly modified not only the phenotype of spruce seedlings and plants, but have even influenced their counts on particular stands.
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LDR and HDR brachytherapy in the treatment of breast cancer - a role of radiological assistant
Michalová, Zuzana ; Kmoníčková, Emanuela (advisor) ; Kindlová, Anna (referee)
I have selected the comparison of brachytherapy irradiation of breast as a theme for my bachelor work. This comparison is demonstrated on two afterloading machines. The first machine is older and less frequent type of device - microSelectron LDR. This machine contains sources of low dose rate, isotope Cs 137. The second is more modern and more frequent type around the world - microSelectron HDR. This device contains one source of high dose rate isotope Ir 192. Both devices are produced by the Holland Company Nucletron. I focus primarily on a description of radiologic assistant work. Device cont rol and check up belongs to my main responsibilities. Check up is performed according to the program of quality assurance formatted by our organization and according to tests distributed by SÚJB. Whole test program consists of two main exams: Operational stability testing and assistance to the physicist within longtime stability testing. Operational testings are selected according to the type of device: Pre - application, monthly, bi-monthly, semiannual and annual testing period. Our Organization does not us e system DICOM. It was implemented only recently, some half year ago. Therefore I had to document the brachyterapy applications on X-ray films. Currently the DICOM system allows to transfer X -ray images directly...
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Natural regeneration of spruce stands in Vysoké Tatry (High Tatras) after large scale disturbation
Michalová, Zuzana ; Weiser, Martin (advisor) ; Wild, Jan (referee)
The observational study on natural regeneration of Norway spruce (Picea abies) was provided during seasons 2010 and 2011 in the windthrow area of High Tatra National Park. The main aim of this master thesis was to describe the distribution pattern in Norway spruce regeneration as well as to estimate the spatial scale, which most preciselly describes the differences in its phenotypic variability. Following step was to determine the relative influence of abiotic and stand factors on the growth characteristics and abundance of spruce seedlings. The Main focus lied on stressing the role of biotic interactions, like intraspecific and interspecific competition, leading to certain discrepancies in the phenotype, as well as in abundance of spruce seedlings.The reponse in variability in spruce traits was recognized at each spatial level. The results showed clear causality between soil moisture and vegetation composition, which both directly modified not only the phenotype of spruce seedlings and plants, but have even influenced their counts on particular stands.
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Competition between spruce seedlings and herbs
Michalová, Zuzana ; Weiser, Martin (advisor) ; Frouz, Jan (referee)
My point was to write about the conditions (mainly biotic) for germination and growth of Norway spruce (Picea abies). It is a literature research for my graduation theses. I found out, that the growth and survival of spruce seedlings is affected by a combination of biotic, abiotic and site conditions. The main abiotic factors are sufficient light and moisture availability, grain class, thickness and quality of humus, susceptible mineral nutrition, steady temperature conditions, thickness of snow cover and occurance of late frosts. I foccused on the growthe of spruce seedlings in vegetation cover, what was the main point of my study. It is because the succes of survival and growth of spruce depends primary on the surrounding, where seeds get after dispersion. Grass-species (for instance, Deschampsia flexuosa, Calamagrostis sp.) inhibited the growth by water and nitrogen uptake, as well as inappropriate temperature and light conditions. Litter also hindered natural regeneration in growth. Some mosses helped young spurces because of steady temperature and moisture regime, but some had too thick rhisosphere, and did not allow them to reach the mineral soil. Shrubs protected seedlings by preventing them from competition with graminoids, but were of no importance for seed protection. Herb layer, but not...
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LDR and HDR brachytherapy in the treatment of breast cancer - a role of radiological assistant
Michalová, Zuzana ; Kmoníčková, Emanuela (advisor) ; Kindlová, Anna (referee)
I have selected the comparison of brachytherapy irradiation of breast as a theme for my bachelor work. This comparison is demonstrated on two afterloading machines. The first machine is older and less frequent type of device - microSelectron LDR. This machine contains sources of low dose rate, isotope Cs 137. The second is more modern and more frequent type around the world - microSelectron HDR. This device contains one source of high dose rate isotope Ir 192. Both devices are produced by the Holland Company Nucletron. I focus primarily on a description of radiologic assistant work. Device cont rol and check up belongs to my main responsibilities. Check up is performed according to the program of quality assurance formatted by our organization and according to tests distributed by SÚJB. Whole test program consists of two main exams: Operational stability testing and assistance to the physicist within longtime stability testing. Operational testings are selected according to the type of device: Pre - application, monthly, bi-monthly, semiannual and annual testing period. Our Organization does not us e system DICOM. It was implemented only recently, some half year ago. Therefore I had to document the brachyterapy applications on X-ray films. Currently the DICOM system allows to transfer X -ray images directly...
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