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Assessment of the impact of the type of wood on the properties of snowboard board core
Jiřík, Adam ; Borůvka, Vlastimil (advisor) ; Gašparík, Miroslav (referee)
Snowboarding as one of the fastest developing sports nowadays forces
manufacturers to improve equipment for this sport or to introduce other innovations
that would enhance pleasure of the ride. The most important and expensive part of the
equipment is the snowboard itself. So far, the high-quality snowboards with the best
ride properties include wood core. Every year a competition called Good Wood is
organized for the best snowboard models of the season.
This thesis deals with design and assessment of the new innovative composition
of snowboard cores using different combinations of wood and other structural solutions.
These compositions were compared with an already time-proven composition currently
used by Hackboards Ltd. company. By using the stress simulation with the finite
element method in SolidWorks Simulation program the stress progress and the
deflection size of designed cores and the reference core were found out. Part of this
thesis was also determining some of the physical and mechanical properties of native
wood types according to relevant norms. Measured values were used to verify
possibilities of using data of appropriate wood type from literatur efor simulation.
Designed composition of the wood core formed by battenboard combining by
poplar and beech reached very similar values as the reference composition formed by
battenboard made of poplar and ash. The composition of combined laminated poplar
and beech veneers showed a little worse properties. The composition formed by beech
battenboard and the composition of laminated beech veneers showed worse properties
in comparison with the reference composition.
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The comparison of different methods for soil physical properties determination
Domin, Vojtěch ; Kumhála, František (advisor) ; Mašek, Jiří (referee)
This diploma thesis is focused on comparison of the methods which are used for soil physical properties measurement . A penetrometer and Kopecky rollers were used. To assess these methods, the soil properties were evaluated on the land of joint-stock company Sloveč near Městce Králové. The first part of this thesis consists of an introduction which describes the basic information related to this issue. The second part deals with literature review where the basic physical properties of soils are discussed, such as porosity and bulk density. The aim of this diploma thesis is mentioned in the third part. It is followed by the methodology in which the different methods of measurement are described. The next chapter focuses on the analysis of measured data and its evaluation. The next part deals with the technical-economic evaluation of measurement methods. The last part brings the conclusion which summarizes all the results of the thesis. The most interesting result of this diploma thesis that penetrometric measurement is affected by soil moisture content so significantly that it can show soil compaction entirely on other areas of the land than measurements using Kopecky rollers.
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Zootherapy and its using for the clients of PN Bohnice
Steklá, Daniela ; Dokoupilová, Adéla (advisor) ; Zita, Lukáš (referee)
Animotherapy is a relatively young branch using the positive impact of animals on the mental, physical and social health. We divide it according to the methods, forms, or animals that are used for the therapy (hippotherapy, canistherapy, felinotherapy, etc.). From the viewpoint of the use of animals in therapy it is important to specify methods AAA (activities) and AAT (therapy). While AAT is a targeted method indicated by the physician and must keep records of the course of the therapy, AAA is a method of natural interaction between the client and the animal and the conditions laid down by the methods of the AAT may not be met. All types of animotherapy should be performed or supervised by a qualified expert with appropriate education, whose task is to establish the aims and procedures of individual therapies taking into account the health status of the client and his current mental frame of mind. By acknowledging the psychological state of the client and his diagnosis, the therapist prevents emergence of dangerous situations both for the client and for the animal involved in therapy. This therapy is used as a supplement for therapeutic or rehabilitation methods. For example, it can help to create or deepen the relationship between the client and the therapist. It is not yet officially recognized as a therapeutic method.
Sociotherapeutic farm in PN Bohnice uses for therapy especially horses (called Hipotherapy (HR), and small animals. The method HR complexly affects the mental and physical state of a person and includes all forms of treatment and rehabilitation using horses for persons with a disability or handicap. Horses on the farm are used for physiotherapy and psychotherapy, while small animals are used in the form of visiting programs by gerontopsychiatric wards. Therapists worked out on the basis of many years of experience their own methodology for these therapies, using which they achieve excellent results.
The results of studies show that animotherapy has a positive effect on clients of all ages and a wide range of diseases. This is a very promising and recently much discussed subject that needs a number of other studies, to be acknowledged as a therapeutic method.
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Evaluation of physical properties of rice cultivars grown in Kyrgyzstan
Nádvorníková, Martina ; Banout, Jan (advisor) ; Fraňková, Adéla (referee)
The purpose of this study was to evaluate physical properties of eight staple rice
cultivars grown and consumed in Kyrgyzstan. The objective was to record and discuss
values of several analysis in sub-sections of basic physical characteristics, textural
characteristics, mechanical characteristics and cooking properties. The physical
properties investigated seed dimensions, equivalent diameter, surface area of the grain,
sphericity, aspect ratio, volume of the grain, bulk and solid density, porosity, thousand
kernel weight, hardness of the grain, colour characteristic, optimum cooking time and
water uptake ratio. Those analysis were performed in the laboratory of Czech University
of Life Sciences and given methodology was strictly followed.
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Organoleptic characteristics of the venison and venison products
Henrychová, Marie ; Kouřimská, Lenka (advisor) ; Daniel, Daniel (referee)
This thesis is focused on the organoleptic properties of game and farm animals meat. Some attention is dedicated to the game meat products too. Hypotesis Organoleptic properties of game meat are statistically different from meat of farm animals was evaluated. Comparison of the scientific publications concering this topic was made. Organoleptic properties are dependent on physical and chemical attributes, thus some of these important attributes are discussed in this thesis.
Results of this thesis show, that there are significant differences between organoleptic properties of game and farm animals meat and the hypotesis is valid. Within chemical and physical properties of compared kinds of meat there are significant difference especially in fat content and fatty acids profile. Game species presented in this thesis have lower fat content and also more favourable fatty acids profile and especially content of unsaturated fatty acid is higher. Significant differences were also in nitrogen compounds content, amino acids composition and haem pigments content. Higher moisture content was often presented in game meat. Differences in protein content were not significant, but several differences were found in the protein composition. During sensory evaluation significant differences were found in intensity and pleasantness of flavour, tenderness and juiciness of meat. Further differences were also found in color.
Specific properties of game meat are transfered also to the game meat products. But in products differences are soften by the use of other components, such as other kinds of meat or food additives.
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Aerosol Dynamics – Mathematical Formulation, Numerical Solution
Pušman, Jan ; Ždímal, Vladimír
Mathematical and computer modeling of aerosols is used in a wide range of applications including atmospheric physics and chemistry, environmental protection, nuclear safety and industrial applications such as the production of nanomaterials. The aim of this work is twofold. We present a closer look at some aspects of mathematical modeling of aerosols as sub-discipline of continuum mechanics. We provide an overview of common methods and we discuss limitations on their applicability. The long-term goal of authors is to create a new solver of aerosol dynamics based on OpenFOAM platform. A mathematical formulation of the problem is given in terms of Navier-Stokes- Fourier system coupled with evolutionary equation governing aerosol size distribution. Trial numerical simulations in a 2D channel were performed under physically simplified conditions.
Fulltext: content.csg -  PDF
Plný tet: SKMBT_C22012102615340 - PDF
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Evaluation of Screening Mammograms by Local Structural Mixture Models
Grim, Jiří ; Lee, G. L.
We consider the recently proposed evaluation of screening mammograms by local statistical models. The model is defined as a joint probability density of inside grey levels of a suitably chosen search window. We approximate the model density by a mixture of Gaussian densities. Having estimated the mixture parameters we calculate at all window positions the corresponding log-likelihood values which can be displayed as grey levels at the respective window centers. The resulting log-likelihood image closely correlates with the original mammogram and emphasizes the structural details. In this paper we try to enhance the log-likelihood images by using structural mixture model capable of suppressing the influence of noisy variables.
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Influence of application of activators of vital soil functions on selected soil characteristics at ZS Sloveč, a.s.
Novák, Václav ; Šařec, Petr (advisor) ; Šařec, Ondřej (referee)
This thesis covers issues of soil physical properties changes after the application of farmyard manure, industrial fertilizers or substances which aim for improvement of vital soil properties. The first part of the thesis is focused on soil issues and besides other things it covers types of soil degradation or physical soil properties. In the next part of the thesis there is a focus on substances which improve physical soil properties. Biochar and other representative products of company PRP Technologies are described in this part. The practical part of this thesis describes selected properties changes which have arisen after a year of field trials in company Zemědělská společnost Sloveč, for example changes in traction or penetration resistance. The last part includes the summary of results, conclusion and the recommendation of author.
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Physical Properties of Soil-Biochar Mixtures - a Laboratory Study
Kidane, Hailemelekot Teklu ; Doležal, František (advisor) ; Petr, Petr (referee)
Recently, biochar´s potential use in soil management and amendment has gained a considerable interest globally. Growing evidence demonstrated that biochar results in sustainable property management when it is applied to the soil. However, biochar vary considerably in terms of physical and chemical properties and its benefits. Previous studies on biochar have been mainly focused on the chemical and nutritional effects. Little is known about the effect of biochar on the physical properties of soils. Therefore, the objective of this thesis was to determine the influence of biochar on the physical and hydrophysical properties of some soils from the Czech Republic.
Three model soil types were investigated used such as; a standard fine silica sand (SA), the Suchdol silty loam Chernozem (CH), and a light Cambisol (CM). The biochar concentration treatments were a control without admixture of biochar (B0); a treatment with addition of 0.001 g/g (B1) and a treatment with addition of 0.01 g/g (B2). Each treatment was carried out in triplication.
The data collected were soil porosity, bulk density and particle density measured by standard methods (drying, weighing, pycnometer). Then the saturated and unsaturated hydraulic conductivity, wettability and retention curve (up to the suction about 80 kPa) were measured with Decagon Minidisk tension infiltrometer and UMS Hyprop evaporation equipment. The experiments were carried out in the Department of Water Resources laboratory.
Altogether, we can say that the effect of biochar addition on the soil physical properties is clearly perceivable but not as strong as one might expect. The identified effects of biochar addition are the decrease in sorptivity, the increase in saturated hydraulic conductivity and the increase in the water retention capacity. However, these effects are not obvious and are not always observed. This would probably happen with the higher doses of biochar above the economic limits.
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