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Modelling of optical microresonators
Hubálek, Milan ; Čtyroký, Jiří
The contribution outlines modelling techniques for analysis of microresonator-based integrated optical components. A principle of modelling of the time domain characteristics with the help of the spectral characteristics including influence of nonlinear optic effects is carried out. Results applicable in the field all-optical devices are shown.
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Study of volatile hydrocarbon decomposition in non-thermal plasma of gliding arc at atmospheric pressure
Töröková, Lucie ; Rašková, Zuzana (referee) ; Kozáková, Zdenka (advisor)
Diploma thesis deals with gliding arc discharge in non-equilibrium plasma, its properties and usage for dissociation of volatile organic compounds. Plasma techniques create a perspective alternative to classical methods such as adsorption, biofilters, thermal processes, freezing and condensation. The method used for analysis of dissociation products is described in the theoretical part as well. Method is gas chromatography and it is combined with mass spectroscopy. The experimental part contains the overall description of GlidArc reactor where volatile organic compounds were dissociated. The volatile organic compound is brought into the reactor from the reservoir by carrier gas (nitrogen); synthetic air was used as working gas. The reactor is connected to the device for sampling. This device has several openings for sampling by SPME fibre method, sorption tubes method and a special opening for probe entry from the device Testo 350 M/XL, which enables instant analysis of low-molecular compounds. GC-MS was used for determination of high-molecular products of dissociation. Products sorbed on SPME fibres were analysed directly, compounds sorbed by active carbon were extracted by carbon disulphide. Samples obtained using SPME fibres were analysed. The major products of the dissociaton were found due to this analysis, those major products are in the case of hexane: pentanal, 4 methyl-3-pentanal, 2-butoxy-ethanol, pentane a 2-hexene. Major products detected when dissociating cyclohexane were: l,3-dimethyl-butane, propanal, cyklohexanone, 5-hexenal a 2-pentyn-1-ol. Major products of xylene dissociation were methyl-benzene, benzaldehyde, 4-methyl-benzaldehyde, 1-nitroethyl-benzene a benzenmethanol. After analysis obtained using sorption tubes showed that mainly the dissociated compound was sorbed, but the products of the dissociation were presented in too low concentration for an adequate analysis. For that reason the sorption tubes were used only for quantitative determination of the compounds depending on the power supply. The dependence of the dissociation of the compounds on the power supply was observed using SPME fibres which were used for quantitative determination. The Results obtained by both obtained techniques were almost in accordance. Speaking of low-molecular compounds, dissociation of all compounds gave the same products, i.e. carbon dioxide, hydrogen, nitrogen oxide, nitrogen dioxide and water. The results show that the dissociation of VOC gives - besides many potentially dangerous dissociation products - significant amounts of nitrogen oxides which is harmful to the environment. Hence it is necessary to be concerned with problems studied in the future mainly with respect to limitation of NOx generation. It will be possible to optimalize the conditions of the VOC dissociation on the basis of future kinetic analysis.
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Modelování podnikových procesů
Panuška, Martin ; Řepa, Václav (advisor) ; Svatoš, Oleg (referee)
In the master's thesis we are concerned with the logical perspective on business process model-ing. The logical perspective on business process modeling has several advantages. First, being a formal logical system, first-order logic let us thoroughly understand the foundations of process modeling. Second, after we understand the logical foundations of business process modeling, we are free to build a BPM language based entirely on logic, or map an existing language onto logic, which may be useful for artificial reasoning. Third, if the business process model is mapped to logic (or another declarative language) it can be easily stored in a declarative knowledge base. Forth, logic based process models can be used in companies as a basis for knowledge manage-ment. And fifth, the science of logic offers a number of various semantic enhancements, which can be used in favor of better business process modeling expressiveness. The first objective of the thesis is to perform a thorough review of the literature of both our fields -- the business process modeling and temporal logic. The related second objective is to study the ability of logic to represent processes and the notion of time in general, and to offer techniques for logical process representation. Subsequently, the examples should be provided in order to present that the selected techniques are capable of performing what is sketched in the first paragraph. The third objective is to propose improvements of the current business process modeling approach and provide relevant examples. Eventually, means of extending the tech-niques presented can be proposed, too. The major contribution of the thesis is that it constitutes a reasonable basis for further research in the chosen field. For novices or even experienced in the subject it represents a good stepping stone.
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Generating data using the LM Reverse-Miner
Stluka, Jakub ; Šimůnek, Milan (advisor) ; Kliegr, Tomáš (referee)
In past years, great attention has been paid to evolutionary algorithms and they have been utilized in wide range of industries including data mining field, which nowadays presents a highly demanded product for many commercial institutions. Both mentioned topics are combined in this work. Main thesis subject is testing of new Reverse-Miner module, which can generate data with hidden properties using evolutionary algorithms while using also other modules of LISp-Miner system, commonly used for the purposes of data mining. Main goal lies in generation of two databases by the module in such way so they would meet explicitly set requirements. Other goals are also set within the thesis in the form of understanding the domain necessary for subsequent modeling. The result of the practical part of the thesis is represented not only by two successfully generated databases, but also by description of steps, methods and techniques used. The common recommendations for data preparation by module Reverse-Miner are later summarized, based on experience with modeling. Previous thesis outputs are furthermore contemplating the conclusion of analysis of technical means used for generation and they also provide several suggestions for possible future extensions.
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The Art therapy's methods use at work with handicapped children
Němcová, Jindřiška ; Vítečková, Michaela (advisor) ; Vlasáková Charyparová, Michaela (referee)
The thesis deals with using art therapy's methods and technique by multi-handicapped children. The first chapter characterizes multi-handicap, defines various disorders and their influence on the personality of a child. The second chapter introduces the therapy options which can be applied to multi-handicapped children, with a strong accent on artetherapy. In the third chapter there are various artetherapic methods and techniques which can be applied to multi-handicapped children. The fourth chapter shows creative expressions of children with the main accent on drawing, painting and modeling. The practical part describes civil associations where the research has been carried out, and presents the results of the research by means of five case studies. Keywords Multi-handicap, mental handicap, physical defect, cerebral defense, sensory defects, autism, art therapy, ergotherapeutics, music therapy, trampoline therapy, canistherapy, hippotherapy, snoezelen, artetherapic methods, drawing, painting, modeling
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Child´s creativity
HYBRANTOVÁ, Jana
Drawing, painting and modelling belong to typical ways of childern´s expressions. Emocional, intellectual, corporeal, perceptional, aesthetic, social and creative growth can be easily analysed by children´s art. The Subject of my exploration in this work is the creativity. At first I mention psychology of creativity issues and interpretation of basic definitions in this sience branch. Then follow characteristics of individual stages of children´s art creativity and characteristics of evolutional stages of creative activities in childhood. In the end there are various art techniques for development of child´s creativity used in art-therapy with children, who attend art lessons in their leisure time. I describe the beginning and the course of art-therapeutic process as well as the children´s art expressions in specific open group.
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Skidding technologies risk assessment: evaluation of soil erodibility based on forest typology
Vymětalová, Zuzana
The purpose of this study is to find optimal skidding technologies for different terrain, soil and typological conditions with a respect to soil erosion. The work is based on the soil erodibility evaluation. The layer of soil which would be potencionally left bare after the stripping by the forestry technique is investigated. We considered possibilities of extending the use of forest typological units as a tool for forest soil erosion assesment. The indisputable advantage of this system is that there are the entire map data for the whole area of the Czech Republic. It enables us to use of geographic information system (GIS). The territory of the Training Forest Enterprise "Masaryk Forest" at Křtiny serves us as a framework for the research and a source of soil samples. These soil samples were laboratory analysed and resulting values were statistically tested and used for modelling in the GIS. The Modified terrain classification was used to define the optimal skidding technology.
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Developments in numerical simulation of foundry processes
Haluza, Jakub ; Kováč, Marek (referee) ; Krutiš, Vladimír (advisor)
With the development of the computer equipment the numerical simulation has become a strong tool for the design and optimization of foundry processes. The goal of the modelling is the tuning of the casting technology in pre-manufacturing stage. Numercial simulation allows studying metal flow, solidification and casting cooling. The work will be aimed to new trends and developments in the field of numerical simulation of foundry processes.
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