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Design of leg for crash test dummy
Maršálek, Petr ; Semela, Marek (referee) ; Bilík, Martin (advisor)
This thesis is devoted to the design model of the lower limbs crash test dummies. It describes how the dummy developed historically, what are currently available for crash tests, what they are made and what their future will be. The main motive of the work is to design a model of lower limb for crash tests, with emphasis on the human anatomy. The work is characterized by how the figurine is produced using the form from material Thermolyne Clear, wood as a substitute human bones and the agar substitutes such as human muscle.
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Návrh nábytkového solitéru s použitím dřeva a kamene
Borbélyová, Jozefína
The thesis deals with the design of table furniture for a public interior in the form of a solitaire. It highlights the importance of using sustainable materials, interprets the trend of returning to nature, emphasizing the use of given materials such as solid wood and natural stone. The work includes the design of a coffee table complemented by a collection of bar and dining tables as a possible transformation and use of design. The visual application of the theme is aimed more at the demanding customers asking for high quality solitaires for their hotel or café interiors. Therefore, the thesis deals with the analysis of individual materials, typology and ergonomics of table furniture, evaluation of the historical context and selected solutions from the present in the theoretical part. Finally, it summarizes the safety requirements and the legislation in force for the product in question. The practical part presents the all-encompassing design process, including variants, the final design itself, its justification, and conveys the entire production process of the prototype.
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Vliv teploty lepidla a povrchu adherendu na hloubku penetrace lepidla do masivního dřeva
Voldřichová, Anna
The final thesis deals with the influence of different gluing conditions on the depth of penetration of the adhesive into the surface of solid wood, specifically of the influence of increased pressure during pressing. Furthermore, the thesis investigates the effect of penetration on the strength of the glued joint under tensile loading. Specimens of spruce and oak wood were glued with UF glue and PVAC glue, pressed under different compression pressures and then subjected to tensile test. SEM analysis on an electron microscope was used to evaluate the depth of penetration. The results of the investigation of the effect of ink on the strength of the bonded joint and the penetration depth of the adhesive into the material are also included. The ink was used in the adhesive mixtures for the purpose of colouring the bonded joint.
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Vplyv extrémneho umyvacieho procesu na pevnosť v ohybe lepeného spoja v listnatom dreve
Tuhý, Dušan
The diploma thesis is focused on the issue of the effect of the washing process on the bending strength of the glued joint in a special solid wood panel made of hardwood. The goal was to analyze currently available adhesives and types of joints in solid wood panels and to deal with the issue of the washing process and its influence. The selected glue was PVAc glue Rakoll ® GXL 4 and a butt joint, and then the changes in bending strength were compared on wood samples from beech, oak, ash and maple after thirty cycles of an intensive washing process using cleaning tablets and subsequent acclimatization of the samples. These were compared with samples that did not undergo the cleaning process.
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Ztráta účinku výchovných zásahů ve smíšeném dubo-bukovém porostu (36A8) na ŠLP Křtiny
Černíková, Karla
The aim of the work was to evaluate the loss of the effect of individual thinnings in the oak-beech forest in Training Forest Enterprise. A research area of 0.84 ha was established in 1989 in a stand that was 49 years old. Thinnings were carried out on this research area (crown, low and Voropanov-Borgrewe thinning). Part of the area was left to natural development (reference area), which took as a comparison. The height, height of the base of the crowns, thickness was measured and the form of the trunk and crown according to Polansky's classification were estimated on individual tree. Measurements were carried out in 1989, 1999, 2005, 2010, 2015 and 2020. There was no response for the thickness when the variants of the thinning method were compared with the reference plots. In the first 10 years, the height increase was recorded in the case of Voropanov-Borgrewe thinning for the oak, and also, in the reference area, where the weakest and lowest oaks died. After 15 years, the height curves of Voropanov-Borgrewe thinning and reference plots were similar as the other methods, and the thinning effect was lost. In the beech, there was no effect of the thinning methods on the height. The effect of self-thinning was very successfully in beech, which is most noticeable in recent years. In the oak, there was no effect of the thinning methods for the parameter the height of the base of the crown compared to natural development. In the beech, there was the effective thinning method in the case of Voropanov-Borgrewe thinning. The factors that were evaluated based on the Polansky classification (the form of the trunk and crown) did not show improvement in oak and beech in any case of thinning methods. In conclusion, we can say that the final evaluation of the effectiveness of thinning methods, which were carried out only once, is not considered significant compared to the natural development of the stand.
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Zhodnocení škod mrazem na zakládaných lesních kulturách v podmínkách ŠLP ML Křtiny
Patáková, Aneta
On the forest property managed by ŠLP ML Křtiny, an assessment of the damage caused by late frosts on the plantations of forest trees was carried out. Data collection took place at the beginning of the growing season (from May to June), when woody plants begin to sprout and are exposed to the greatest risk of damage from late frosts. Frost events were measured using TMS data loggers, which record the ground air temperature using temperature sensors. The assessment was carried out on young cultures of beech, oak, spruce and fir with a maximum age of 3 years. A total of 28 leguminous areas of different sizes (categories up to 0.1; 0.11 – 0.5 and over 0.51 ha) were evaluated, on which the average damage of the assimilation apparatus was determined on a representative sample of 100 seedlings. The results showed that the most sensitive tree species to late frosts are beech (damaged 56.9 ±30.7% of seedlings) and fir (52.4 ±46.6%).
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Souběžná obnova dubu zimního (Quercus petraeaMatt./ Liebl.) a dřevin přípravných
Žákovský, Jan
This work focuses on alternative solutions for forest regeneration in areas affected by calamity, namely the simultaneous regeneration of target and preparatory trees. The aim of the work is to evaluate experiments of simultaneous regeneration of winter oak (Quercus petraea Matt. / Libel.) and pioneer trees - grey poplar (Populus x canescens (Aiton) Sm.), aspen (Populus tremola L.), sticky alder (Alnus glutinosa L.), white birch (Betula Pendula Roth). established in the areas - Valšovice (SLT 3 B ) and Olšovec (SLT 4 S, 4 O) in 2015 and 2016 respectively. The results showed that aspen grows the fastest in height among the pioneer tree species. Rapid thickness and height growth was recorded for alder and birch. In the Olšovec alder there was a significant deterioration in vigour in the last year of the survey. Grey poplar did not progress on the Olšovec forest. Positive effect on oak regeneration was found only in alder on TVP Valšovice. The effect of pioneer tree species on oak quality was not unanimous.
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Sestavení historické části regionální dubové standardní chronologie pro oblast jihozápadní Ukrajiny
Formánek, Šimon
Due to the high number of preserved wooden churches and bell towers in the southwest of Ukraine, it is possible to study their architecture and history. By the use of dendrochronological dating, we can determine with annual accuracy their construction or reconstruction year, which can be compared with the information available in historical literary sources. The aim of this thesis was to use dendrochronological analysis to determine the age of individual sacral buildings and to create a local standard oak chronology. Dendrochronological dating took place on a total of 11 churches and bell towers in the region of southwestern Ukraine. 167 samples were collected for analysis using Pressler borer. 41 oak and 5 fir samples were successfully dated. Oak wood had the highest representation among individual samples – 144. The wood of fir, spruce, poplar, ash and birch was present to a lesser extent. The oldest wooden element that has been reliably dated is from the Church of St. Nicholas in Serednia Vodiane, dating from 1591–1599. On the other hand, the youngest dated structural elements dating back to 1973/1974 are from the Church of St. Michael the Archangel in Uzhgorod. Other wooden churches and bell towers date back to the period between the 16th and the turn of the 17th and 18th centuries. Based on the successfully dated tree-ring series it was possible to create a local oak standard chronology covering the years 1366–1805 and 1890–1972. Dendrochronological dating helped to clarify the structural and historical development of wooden sacral buildings in the southwest of Ukraine and to provide information that is often missing in literary historical sources. The newly developed standard oak chronology will be able to serve as one of the cornerstones of a new oak standard chronology for the region of southwestern Ukraine.
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Pěstebně-ekonomická analýza listnatých mlazin s různou příměsí dubu vzniklých kombinovanou a umělou obnovou
Zapletal, Miroslav
Abstract of the work This thesis deals with the growth characteristics of oak at the stage of coppice that was based in different variants depending on the type of mixing and method of recovery (combined, artificial). The research areas are located in Kostelec woods which is about 7 km from the Holešov town in the district of Kroměříž. In total there are five areas evaluated, the area (I, II) Option 1 - monoculture and area (III - V) Option 2 - mixed (combined and artificial regeneration). Crops were chosen so as they are the same age, only the area V is older and without silvicultural intervention. The measurement of tree species was carried out in each alternative on the pad of 3.14 m2 (r = 1 m) in a regular grid of 5x5 m. On each space were measured height, výčetní tloušťka a cenotické postavení of all trees and quality of the treetop. Collected data are recorded in tables and graphs. The results of the thesis show that the oaks in option (1) in all the above parameters are better than in the variant (2).
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Dendrochronologické datování a stavebněhistorické hodnocení krovu kostela svatého Jakuba Staršího v Omicích (okres Brno-venkov)
Tetur, Vladan
The aim of this work is determination of the age of roof construction of the Roman Catholic church of St. Jacob the Elder in Omics, using dendrochronological analysis. In this work is describes a standard procedure for dendrochronological dating from the sampling, editing, measurement and dating. There is also incorporated building-historical development of the building, where the effort is to determine chronologically the development of the whole building from historical literary sources. The roof of the church is mainly built of fir wood, except for two old oak binding beams, and binding beam belfry which is spruce. The fir trees used on the roof over the presbytery were cut away in autumn or winter in 1874 or in winter at the beginning of 1875. The oak trees used on the old binding beams were cut away after 1765. The fir trees above the main ship were cut away after 1917. The spruce tree used for the binding beam of the belfry was cut away in the autumn or winter of 1927 or in the winter of early 1928. Trees used for the bell tower failed to date. Using dendrochronological dating and anatomical wood building analysis, we were able to supplement or refine the historical development of the church.
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