National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Variabilita šířky letokruhu a konvenční hustoty dřeva vybraných dřevin po výšce kmene na Drahanské vrchovině
Becha, Lubomír
The aim of the thesis is the determination of the spring and summer wood percentage, annual ring´s width and conventional density of the chosen woody plants and its dependence on the trunk´s level. For these purposes were researched 9 different trees. It was taken 10 wooden segments from the each chosen level of the trunk. It was chosen program WinDendro and it was made dendrochronological analyses and measurement of the spring and summer wood. It was used Olson´s mathematics figure for the conventional density calculation. In this calculation it is always used maximum level of the wood volume. The outcome is the number which is almost realistic figure of the conventional density change and structure change of the annuals´ rings. These outcomes are measured in the transection and cross section.
Posouzení použitelnosti programu WinDendro v dendrochronologické praxi na základě porovnání se standardním postupem v programu PAST4
Becha, Lubomír
The thesis is focused on the application of two programs -- PAST4 and WinDendro - in the dendrochronological practice and their application in selected ten trees. Trees growing in the Czech Republic are divided into four groups: conifers, deciduous circular porous trees, scattered porous and semi-circular porous. Each group has its own specific microscopic and macroscopic features. For the purpose of this thesis an amount of 100 samples were measured in both programs. The results are giving correct idea about which of the two programs is most suitable for each tree species.

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