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The subject of the thesis was the analysis of recycled wood for the use of glued beams on selected mechanical properties. Recycled wood was used for this research. Test specimens, ie lamellas with dimensions of 2000 × 80 × 20 mm, were made of both recycled wood and healthy wood, which was subsequently glued into a laminated beam, always after an odd number of layers; 2000 × 80 × 100 mm. Subsequently, values of tensile strength and modulus of elasticity in cross-fiber compression were determined experimentally. The measured data were statistically analyzed and the results discussed and compared with the literature.

This thesis is focused on the evaluation of hetereogeneous weld joints made by CMT technology using acoustic emission. The thesis is divided into four parts. The first one is focused on the describe CMT technology. The second part describe the principle of acoustic emission. The following part includes the methodology of experimental part. The final section deals with on the relation between the tensile strength of the samples with the measured values of acoustic emissions from the welding and cooling of the material.

At the present work it was studied growing of Nectandra megapotamica (Spreng.) Mez species, through a sampler compounded by 11 dominant trees selected from rainforest in Nova Prata borrough, state of Rio Grande do Sul. The growth of the sampler trees can be give up successfully through steam analysis determ the growth trend in percentual volume along time, for the selected trees. The mathematical model better represents the growth trend in percentual volume was described as iv%=(b0+b1.ln dap)2, fitting individually per tree. Covariance analysis earn possible to cluster three groups, contends trees with decreasing trend were similar in relationship to trend and curves level, being possible to describe this variations with mathematical models using independent factors, as: morphomety, competition and environmental from the trees in case, by expressions : b1 = 0,41738583 + 4,16179208.id5 - 6,29332107.h/d + 0,37822636.EXPOS - 0,11519372.Ir + 5,80418708.BALcor 0,06858050.Lc, with determination coefficient equal to 0,9979 and variation coefficient of 1,73%, as well as the differences between curves levels by equation b0 = 2,62465943 13,37023979.id5 + 22, 08329412.h/d 1,33160878. EXPOS + 0,34688547.Ir 23,88899208.BALcor + 0,25692291.Lc, with determination coefficient fitting on 0,9907 and variation coefficient of 2,71%. / No presente trabalho, foi estudado o crescimento da espécie Nectandra megapotamica (Spreng.) Mez através de uma amostra composta por 11 árvores dominantes, selecionadas em Floresta Ombrófila Mista, no município de Nova Prata-RS. O crescimento das árvores amostradas pôde ser reconstituído com sucesso por meio da análise de tronco, determinandose a tendência do crescimento em volume percentual ao longo do tempo, para as árvores selecionadas. O modelo matemático que melhor representou a tendência de crescimento em volume percentual foi descrito como iv%=(b0+b1.ln dap)2, ajustado por árvore individual. A análise de covariância possibilitou a formação de três grupos contendo árvores com tendência decrescente semelhantes entre si, em relação à tendência e nível das curvas. Tornou-se possível descrever estas variações com modelos matemáticos utilizando-se variáveis independentes de morfometria, concorrência e ambientais, das árvores estudadas, pelas expressões: b1 = 0,41738583 + 4,16179208.id5 - 6,29332107.h/d + 0,37822636.EXPOS - 0,11519372.Ir + 5,80418708.BALcor 0,06858050.Lc, com coeficiente de determinação ajustado igual a 0,9979 e coeficiente de variação de 1,73%, bem como as diferenças entre níveis das curvas pela equação b0 = 2,62465943 13,37023979.id5 + 22,08329412.h/d 1,33160878.EXPOS + 0,34688547.Ir 23,88899208.BALcor + 0,25692291.Lc, com coeficiente de determinação ajustado de 0,9907 e coeficiente de variação igual a 2,71%.

The present thesis deals with geometric lighting and methods of its construction. In particular, it is aimed at parallel and central lighting of objects and groups of objects. The work includes a theoretical part, in which you can learn about the properties, methods and basic concepts related to geometric lighting. Afterwards, there is a practical part, which contains a set of examples in different projections with their solutions and visual pictures. Last chapter is about using computer for modeling of geometric lighting; mainly it is about possibilities of software Rhinoceros. In addition, the chapter contains modeled lighting of the charming Taj Mahal. The project is filled up with a number of pictures to enhance the reader's imagination about the principles and methods of lighting. In the work I emphasized intelligibility and usability of the methods listed there. In general, thesis Geometry of shadows is devoted to everybody who wants to learn more about the geometry of shadows. The thesis could be a useful study material for students and teachers of descriptive geometry. The work also includes the DVD, which contained Rhinoceros files of images, worksheets with examples solved at the work and the thesis in electronic form.

The aim of this dissertation was to prepare a literery overview of the material broadly used for the wooden constructions and their consecutive experimental trials focused to strength and module of elasticity in bending at strictly selected large oriented strandbo-ards, quality strandboards and chipboards at different levels of moisture. The next phase of the dissertation was to prepare a statistics evaluation of gained data and results during the evaluation period which are outlined at different forms including tables and statistics charts.

The aim of this thesis was to analyse the macroscopic structure of the wood of Douglas fir (Pseudotsuga menziesii (Mirb.) Franco) and determine selected physical and mechanical properties with an emphasis on the comparison of juvenile and mature wood zones. Additionally, the structure and selected properties of the wood from sites varying in the forest types (3K, 3B, 3A) were compared. Five sample trees were sampled in each of the three selected sites. Their rootstock parts were then worked into test specimens with dimensions of 20 x 20 x 30 mm a 20 x 20 x 300 mm. The selected wood properties were the density at moisture content of 0% and 12%, basic density, the total shrinkage in all three basic directions, the total volumetric shrinkage, strength in compression parallel to the grain, bending strength, and the modulus of elasticity in bending. Additionally, a tree-ring analysis was conducted. It was found out that the juvenile wood has wider rings, a lower proportion of earlywood and all the observed properties showed lower values. The properties determined and the structure of the wood from the selected groups of forest types is statistically significantly different in most cases. From the forestry perspective, the resulting material characteristics of wood of Douglas fir are greatly dependent on the site; however, the precise location of the sample within the stem (centre or periphery) has a more pronounced effect on the properties.

The submitted thesis deals with landscape analyzing and permanent landscape structures evolution in chosen area with respect to land relief. Also with documentation and evaluation of landscape values (such as medieval field patterns, scattered vegetation, viewpoints, relief, etc.) and last but not least with suggestion of recommendations for future development, including proposal of new development, specific for chosen area. The theoretical part consists of summary of current status. Mainly the elements characterizing landscape of the Czech Republic are defined here. The thesis also describes history of Czech landscape since the Neolithic period and also evolution of medieval field patterns. The landscape aesthetics and its influence to humans from emotional and content point of view is mentioned in the theoretical part as well. In the next chapter there is an evaluation of maps and description of possibilities of their usability for evaluation of landscape evolution. The practical part is about project itself. At first the suitable area based on maps from 1 952 was chosen and their comparison with present state. By maps vectorization (both historical and present one) supported by personal exploration, two map underlays were created. Based on them, the statistical data for evaluation and comparison of land use categories evolution were created. Also the analysis of appearance of given land use categories was performed. Comparison of changes in evolution of balks is the part of the project as well.. One of this thesis purposes was also evaluation of landscape directly on the spot. Based on this evaluation and personal feelings from the area, design for better land usability was created. This design was also economically considered. In discussion at the end of the thesis was determined that epoch around year 1952 was a breakthrough for landscape evolution. After this year, there was a huge decrease of ploughland area. This decrease was replaced by permanent grassland and forests. In the end there is an estimation about medieval field patterns important for landscape in chosen area and also anywhere else.