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Comparison of yield and nutritive value of einkorn, emmer and spelt produced by prehistoric technology
Habětínková, Kateřina ; Hejcman, Michal (advisor) ; Pavlů, Vilém (referee)
Triticum monococcum (einkorn wheat), Triticum dicoccum (emmer wheat) are the main cereals planted by the first European farmers since 5600 B.C. Triticum spelta (spelt wheat) is planted since Roman period. The aim of the thesis is comparison of yield and nutritive value of einkorn, emmer and spelt produced by prehistoric technology. There is almost nothing known about planting wheat under prehistoric conditions. To fill this gap, an experiment on experimental field in Praha Suchdol were performed. There was used technology of broadcast seeding, with no weeding. The obtained data were used to define yield parameters (HTS, Hulled index, yield [t/ha]) and concentrations of monitored elements (N, P, K, Ca, Mg, Cu, Fe, Mn, Zn, Cd a Pb), which affect nutritional value of wheat. Yields were 1.01, 1.38 and 0.99 t/ha, HTS was 27, 28.7 and 39.3 g and Hulled index was 0.71, 0.72 a 0.70 for einkorn, emmer and spelt. Results were compared between species and with other authors. The grain yields do not correspond with other authors, they are lower. Low yield and dilution effect absence caused, that concentration of minerals (especially nitrogen) were higher (30.5, 31.3 and 30.3 g/kg) than common values of mineral concentration. Surprising values were observed for Zn (39.7, 43.9 and 36.9 mg/kg). Concentrations of Zn were very low, which may be caused by poor mobility of Zn in soil, due to high pH. We observed statistically significant differences between einkorn, emmer and spelt.
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Optimalization of PC based on user requirements
Doshimov, Akzhol ; Toman, Prokop (advisor) ; Závodný, Martin (referee)
This work presents an overview of hardware components with currently used technologies. Clarification of their specifications, briefly their roles and functions. The basis was to show some solutions to computer configurations according to the requirements and methods of their use. The first will be an office machine. As a second office will be analyzed for the household and family use and last a powerful gaming machine. Practical part contains information for selection the right components, suggestion to think about certain things before buying an assembly and choose of components for specified configurations based on requirements.
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Effect adjustments of selected components for the production of compound feed and their nutritional efficiency
Maloušková, Monika ; Kodeš, Alois (advisor) ; Jiří, Jiří (referee)
This diploma thesis assesses influence of treatment of feed components on feed compounds and related animal production. It is primarily focused on different degrees of disintegrating of particular feed components and comparison of various grinding machines. It also describes essential nutrients contained in feed and their function in organism, common types of engines used in compounded feed production.
The goal of the diploma thesis' project is to evaluate an effect of various disintegrate of components in hammer and cylindric grinding machine. Another goal of diploma thesis' project is to approve or disapprove four hypotheses. H01 "All components used in compounded feed production can be ground by observed types of grinding machines". H02 "Economic demands of grinding is equal for all observed grinding machines". H03 "Uniformity of ground particles is the same for all observed grinding machines". H04 Quality of grinding does not affect nutritional value of compounded feed for observed grinding machines and observed animals.
It was chosen 5 grinding machines for the purpose of research which are commonly used in agricultural companies and feed manufacturers. Data was collected from operators of grinding machines or feed manufacturer's experts. The thesis discuss some abroad researches for comparison of results. The results discover that most effective are cylindric grinding machines, but they are inappropriate for some feed components. Good results have also hammer grinding machines with upper load. All observed grinding machines except roller produced material with low uniformity. Hypotheses H01, H02 and H03 were disapproved by the research. Hypothesis H04 was neither approved nor disapproved.
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Control Techniques of Grid Connected PWM Rectifiers under Unbalanced Input Voltage Conditions
Bejvl, Martin ; Šimek, Petr ; Škramlík, Jiří ; Valouch, Viktor
Current-controlled voltage source converters are widely used in grid-connected applications,for example at ac drives with indirect frequency converters.The structure and parameters of the PLL are developed and proposed in order to cope with the grid containing both the positive and the negative sequence component, and minimize the wrong frequency transients during phase angle steps and also in the start-up stage. The DSC technique was realised. There is also necessary to compensate the negative sequence component in the grid voltage. The negative sequence component of the grid voltage causes ripple of the dc voltage in the intermediate circuit. Several sophisticated topologies of converter current controller were developed, simulated and tested for this purpose. Results of simulation and experimental tests are provided to evaluate different current control schemes and phase locked loop techniques.
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New features and technologies in current and future Invenio versions
Kunčar, Jiří
The aim of this paper is to introduce new features and technologies in upcoming versions of the Invenio software suite. Invenio was originally developed at CERN (Eu- ropean Organization for Nuclear Research) and covers all aspects of digital library management or document repository on the web. We focus on describing improve- ments of full-text search using external ranking tools, multimedia management, cir- culation and holdings module, and new user interface built on top of new technology stack using a Python micro-framework, modern templating engine and powerful SQL toolkit.
Fulltext: nusl-126793_2 -  PDF
Slides: nusl-126793_1 - PDF; nusl-126793_5 - PDF
Video: nusl-126793_4 -  MP4
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Concentration of HCl, HF and Sulfur Compounds in Fuel Gas from Fluidized Bed Gasification of Coals and Wood by Steam-Oxygen Mixtures
Svoboda, Karel ; Pohořelý, Michael ; Jeremiáš, Michal ; Kameníková, Petra ; Skoblia, S. ; Beňo, Z. ; Šyc, Michal
We have concentrated in our study on FB gasification of two kinds of coals differing in reactivity, ash content and composition and hard wood at temperature 850 oC. Our attention was particularly devoted to speciation of sulfur compounds, presence of HCl, HF and tar compounds in fuel gas. Silica sand and mixture of silica sand with gradually added dolomite was used as basic particulate bed material in FB gasification. The results have shown that presence of dolomite particles in the fluidized bed and presence of dolomite dust reduces concentrations of all sulfur species, but the reduction of thiophene concentration is more pronounced. Presence of dolomite in FB causes substantial decrease of HCl concentration and moderate decrease of HF concentration in fuel gas. Accumulation of char and ash with active calcium based components leads to moderate reduction of HCl and sulfur compounds concentration in fuel gas.
Fulltext: content.csg - PDF
Plný tet: SKMBT_C22012102413551 - PDF
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Experiments and Modelling of Liquid–Liquid Equilibria in the Mineral Oil + N,N-dimethylformamide System
Sedláková, Zuzana ; Andresová, Adéla ; Morávková, Lenka ; Bogdanić, Grozdana
Description of phase behaviour of a highly nonideal system mineral oil + DMF is a rather complex task, because hydrocarbon feed, which has to be separated into aromatic and nonaromatic fractions, consists of large number of compounds that differ significantly in molecular weight and chemical structure. Such a complex mixture was substituted by two pseudo-components, aromatic and nonaromatic in order to simplify the procedure. They were represented by adequate model compounds, whose thermodynamic behaviour was similar to the original one. The chosen model system simulates properly the real one in the sense of the mutual solubility of aromatic and nonaromatic components. However, this simplification of description of strongly nonideal mixtures should be considered as the first approximation.
Fulltext: content.csg - PDF
Plný tet: SKMBT_C22012102413410 - PDF
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Comparison of virtualization systems technologies
SLÁDEK, Lukáš
This bachelor thesis deals with the description of virtualization technology systems commonly used in IT practice. It discusses basic concepts, defines the term virtualization. The larger part is devoted to analysis of the principles on which the virtualization works. We can find here the concept of hardware virtualization, software virtualization, paravirtualization, hypervisor and other. All of these concepts are explained. The following is a description of products that are in common practice used to virtualization, including the description of their architecture and components of virtualization systems. Three representatives of hardware virtualization are described in detail -- VMware ESXi, Microsoft Hyper-V, Xen Hypervisor and two representatives of the software virtualization -- Oracle VM VirtualBox and VMware Workstation as well. These five products are tested and evaluated in the last part of the thesis. Based on the overall benchmarking are systems approximately the same performance, but in particular tests we can find differences.
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Deployment of corporate audio-video technology
Nikl, Martin ; Havránek, Martin (advisor) ; Matyáš, Matyáš (referee)
This thesis deals with the possibility of connecting, automating and controlling audio/video hardware. In the theoretical part the author deals with input and output A/V devices, A/V interfaces communication interfaces, possibility of connecting automation elements and a room control. It explains terms relating to the audio/video topic.
The practical part suggests a complete design and implementation of a showroom to present the portfolio of Colsys company, which demonstrates functions of the control system Crestron, such as controlling projectors, video matrices, sound equipment and building automation (lights, air conditioning, blinds, etc.). First part of this section deals with defining the requirements for individual devices. The next step was the selection of suitable components based on fulfilling the set criteria and the budget. After that a check of compatibility was performed and room layout was designed, which contained electrical layout and a room blueprint. Final step of this section was designing the user interface and its realization in order to create the control unit program.
Based on the theoretical part the author created a chapter titled Recommendation, which is verified in the practical part by creating a fully functional showroom for Colsys company, which also serves as a meeting room.
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Use of soil conservation technologies in the growing of sugar beet
Hybler, Jakub ; Urban, Jaroslav (advisor) ; Vladimír, Vladimír (referee)
More recently we meet with many extremes of weather. One such are sudden and heavy rainstorms. Now most these rains endanger the agricultural land the emergence of water erosion. Most sensitive to water erosion are wide row crops, including sugar beet also. For these reasons, in recent years we paid great attention to the impact of tillage effects on soil water erosion.
The aim of this thesis was evaluate the influence of autumn tillage on water erosion soil in the stand of sugar beet, but also on the yield and quality parameters of the crop. A secondary aim was to assess the effect of increasing the leafy ground cover beet on water erosion soil.
For this purpose over the years 2012-2015 based on accurate field trials on lands Agro Chomutice Inc. Experiments were set up in three variants namely shallow loosening (10 cm) deep plowing (25 cm) deep loosening (25 cm). In various growth phases proceeds artificial rainfall. In the first growth phase was not sugarbeet involved either in row and not in the between rows. In the second growth phase of the beet involved in the row between rows but not yet. In the third growth phase has been fully involved growth. Itself artificial rainfall was performed field simulator rain and was observed soil loss from individual variants.
At artificial rainfall it was found that sugar beet is the most threatened by water erosion soil in the early growth phase and at this phase the most evident difference autumn tillage to sugar beets. In the first growth phase of sugar beet, which was carried artificial rainfall, the best results both for deep loosening and deep plowing. In 2012 (24. 5. 2012) was measured with a deep loosening of soil loss of 1.30 t ha-1, representing a decrease of 64.76% compared to the shallow loosening and by 40.91% compared to deep plowing. Conversely, in 2014 (2. 6. 2014) was evaluated as the best variant of deep plowing the soil loss of 0.11 t ha-1. Such loss soil is 78.43% less compared to the deep loosening and lower by 91.41% compared to the shallow loosening. Similar results were achieved for both deep loosening and deep plowing in the later phases of growth, which was carried artificial rainfall. From the results it was found that the sugar beet at later growth phases better resists water erosion. This is illustrated in 2012, when the first artificial rainfall (24. 5. 2012) was observed soil loss of 2.20 t ha-1 for deep plowing. In the second artificial rainfall (6. 6. 2012) 0.03 t ha-1, and the third (1. 8. 2012) have been measured zero loss soil. The same results were achieved in the following experimental years.
On deep loosening achieved the largest root yield (99.71 t ha-1), but the difference between deep plowing (99.32 t ha-1) was only 0.39%. The highest sugar content reached variant with deep loosening (18.95%). When the statistical treatment has not been established between the variants statistically significant difference. The greatest yield root recalculated at 16% sugar content reached variant with deep loosening (122.32 t ha-1), but again the difference between deep plowing (119.81 t ha-1) was only 2.10%.
Results from four years has clearly demonstrated beneficial effect of deep loosening and deep tillage on soil water erosion in the sugar beet crop. Furthermore, it was found that with increasing abundances leaf and root growth of sugar beet decreases danger of water erosion. Sugar beet is the most susceptible to water erosion in the early phases of growth, and at this time was applied deep autumn tillage. For a fully wired vegetation were not detected significant loss soil, and at this time ceases to be a dangerous erosion sugar beet crop. For yield and quality parameters of sugar beet was found positive effect of deep loosening and deep tillage on yield and quality of sugar beet. The least favorable results in all experimental years was achieved in a shallow loosening.
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