|
|
Experimental stand for rotational heat pipe verification
Liška, Martin ; Sikora, Michal (referee) ; Vlach, Radek (advisor)
This bachelor thesis presents a design of an experimental stand for testing of cooling effects on electrical machines trough rotational heat pipe and mainly with design and construction of experimental stand, that represents rotational heat pipe of real machine rotor. Pipe is heated by means of resistance conductor winding and average temperature on a pipe surface is scanned with a additional parallel winding. Experimental stand was designed for subsequent experiments and for evaluating of rotational heat pipe parameters.
|
|
|
Rozbor možností uplatnění včelařství jako součásti přidružené lesní výroby
Ferus, Václav
The bachelor's thesis deals with the possibility of applying beekeeping as part of non-wood forest production within forest property. It introduces the natural conditions, the current tree composition and the current habitats of beekeepers with the approximate number of bee colonies. It also introduces the costs that the owner of forest property would have to incur in order to raise and care for bee colonies, as well as the costs of tools for obtaining individual bee products and defines the subsequent possible profit and return. Part of the thesis is a questionnaire that was implemented on the website www.survio.com, while the questionnaire was targeted at beekeepers in beekeeping groups.
|
|
| |
|
|
Analýza nabídky trvalek na českém trhu
Koluchová, Lucie
Analysis of perennials on Czech market covering sellers with the biggest variety of goods. Merchants were selected from pereny.org website. Main objective was making a list of all perennials offered and assessing their properties like colour, height, time of bloom and sunlight requirements. All data were written down to tables and processed to graphs interpreting richness of the species following mentioned criteria. Finally, all offered goods were critically evaluated based on all gardeners needs.
|
|
|
Biology of three-toed woodpecker
Navrátil, Martin ; Fuchs, Roman (advisor) ; Reif, Jiří (referee)
In my thesis I have tried to find out how does forest management influence presence of the Three-toed woodpecker Picoides tridactylus.This species is considered a "flagship species" of an untouched primeval type of forest and therefore it requires our attention and protection. The thesis contains results of North-American studies focused on the species very similar to Picoides tridactylus. The main chapters are those aimed to provide information about how is the Picoides tridactylus affected by forest fragmentation, stand health condition and finally the impact of food supply on the occurence and behaviour of the species.
|
|
| |
|
|
Zhodnocení vlivu podmínek stanoviště a období těžby na vlastnoti dřeva smrku
Zlámal, Jan
Diploma thesis, Mendel University in Brno, 2019 This thesis deals with some factors influencing the physical and mechanical properties of Norway spruce wood (Picea abies L. (H. Karst)), mainly the effect of felling time and wood processing on physical and mechanical properties. This thesis analyzes data from standing trees, lying logs and worked beams. The beams were processed in four different ways, by hewing, standard cutting, hewing from dipped logs, hewing and subsequent dipping. Felling of trees for the production of these beams was performed in winter, spring and summer. Most of the felling operations were carried out with respect to the moon phase, always the first and second quarters of the month phase. The results of experimental measurements are arranged and statistically evaluated. Also the thesis summarizes the findings from literature of suitable spruce habitats for the selection of quality wood raw material.
|
|
|
Vliv stanoviště a kvality výsadby na odrůstání kultur dubu letního
Vaníček, Lukáš
The aim of the thesis is to find out the impact of the forest stand and the quality of the planting on the growth of Quercus Robur L cultures. For this purpose there was found 10 research forest plots at forest habitat types 3K, 4K, 3S, 3C, 3L, 3P situated in LS LČR Jeseník area. In 2014, a bare-root variant of Quercus Robur L seedlings was planted in each research plots using slot planting. In each research area, several parameters and traits of the above-ground part were detected in 100 individuals, and the root system was dug and analyzed in six individuals on each research area. After the end of the vegetation period in 2018, the above-ground part was measured, the following parameters and features were examined: height of the above ground part, height increment, lateral increment, root neck thickness, trunk ripple, trunk deviation the size and color of the assimilation apparatus, the damage of the cultures by biotic and abiotic factors. Root systems have been evaluated for root depth, main root length, incidence of stumbling, absence of stakes or panohs, and p-index value. The results clarify that culture at nutrient and water-enriched habitats have better vitality. The worst results were found by 4K forest type.
|
|
|
Porovnání růstu prostokořenného a krytokořenného sadebního materiálu
Souchová, Jana
The aim of the thesis was to compare and evaluate the growth of bare-rooted and rooted seedlings of the same tree species based on the findings. All trees compared and monitored in this work were planted in the same area of the cane, in 2016. The evaluation was carried out on 4 research areas, these areas are characterized by sets of forest types 2S (fresh beech oak), 6K (sour spruce beech), 6S (fresh spruce beech) and 7K (acid beech spruce). There are three species of woody species in these areas, namely Norway spruce (Picea abies (L.) Karst.), Douglas fir (Pseudotsuga menziesii (Mirb) Franco) and European beech (Fagus silvatica L.). On each plot, 100 individuals were subjected to measurement for each variant of planting material in the autumn of 2017, for which the following parameters were evaluated: losses, height of the overground part in 2016 (which was measured after the scar marking the last increment), height of the above ground part in 2017, increment in 2017, the length of branch growth in 2017, the width of the crown, the thickness of the root neck, the trunk deflection from the vertical axis, the length and width of the assimilation apparatus, the straightness of the stem, the vitality of the plant. Based on the results, the following conclusions were drawn: On the SLT 6K surface in the case of woody beech, the variant of planting material grew better. In contrast, barkless planting stock grew better in Douglas fir tree species. The Norway spruce tree then grew better in the rooted variant. In the overall assessment of the abovementioned factors, it can be stated that on the SLT 6K the rooted seedlings grow better. In the SLT 6S area, the species of beech was found to be better growing in the bare-root variant. The Douglas fir also grew better in the bare-rooted variant and Norway spruce was best grown in the rooted roots variant. The result is that the bare-rooted planting material grows better on SLT 6S. On the area of SLT 7K there was a better growth of the beech in the rooted variant, as well as the better overall results of the spruce in the openrooted variant. Douglas fir grew better on the area in the barefoot variant. To summarize the findings of the observation on SLT 7K, it can be stated that the better results are achieved and hence the growing of the rooted planting material. In the SLT 2S area, the results for the growth of beech wood were better in the bare-rooted variant; Douglas fir tree has not been evaluated for this area due to insufficient seedlings when setting up the research area.
|
|
|
Klady a zápory užití krytokořenného sadebního materiálu
Kohout, Karel
The aim of bachelor thesis was to find out the positives and negatives of the use of containerized planting stock on different sites. For this evaluation, operational plantings were estabilished, that were planted with containerized planting stock. On the same sites, planting with the bare-rooted planting stock were evaluated. The following woody species were compared: Norway spruce (Picea abies (L.) Karsten), European beech (Fagus sylvatica L.), Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco), silver fir (Abies alba Mill.), Scots pine (Pinus sylvestris L.), and European larch (Larix decidua Mill.). Each pair of plantings (with containerized and bare-rooted plants) has the same age and i tis on the same set of forest types (1K, 3B, 3S, 4B, 4S, 5K, 6S, 7K and 7P). It is evident from the achieved results that in 75% of the achieved results was better containerized planting stock.
|
guest ::
