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ELECTRON BEAM REMELTING OF PLASMA SPRAYED ALUMINA COATINGS
Matějíček, Jiří ; Veverka, J. ; Čížek, J. ; Kouřil, J.
Plasma sprayed alumina coatings find numerous applications in various fields, where they enhance the properties of the base material. Examples include thermal barriers, wear resistance, electrical insulation, and diffusion and corrosion barriers. A typical structure of plasma sprayed coatings, containing a multitude of voids and imperfectly bonded interfaces, gives them unique properties - particularly low thermal conductivity, high strain tolerance, etc. However, for certain applications such as permeation barriers or wear resistance, these voids may be detrimental.\nThis paper reports on the first experiments with remelting of plasma sprayed alumina coatings by electron beam technology, with the purpose of densifying the coatings and thereby eliminating the voids. Throughout the study, several parameters of the e-beam device were varied - beam current, traverse velocity and number of passes. The treated coatings were observed by light and electron microscopy and the thickness, structure and surface morphology of the remelted layer were determined and correlated with the process parameters. Based on the first series of experiments, the e-beam settings leading to dense and smooth remelted layer of sufficient thickness were obtained. In this layer, a change of phase composition and a marked increase in hardness were observed.\n
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Specifics of social work with clients with drug addiction
HANZALOVÁ, Vendula
The number of people in the population who use addictive substances and develop adverse life situations is still growing. This issue is also connected with social, health and legal problems with which the drug user must deal. In this case, those addicted can look for help to institutions such as a contact centre. The theoretical part is focused on three topics. The first describes the terms of drug addiction, its origin, consequences and forms of support. The work deals with theories that are significant to the work. The last topic concerns the specifics of social work in a contact centre. There are selected core activities and techniques specific to this institution. I set the aim for this paper, which was to answer the question of which theoretical approach is best applied by social workers working with drug addicts. Furthermore I was finding out which are the best examples of good practical training. The results after evaluation showed that social workers cannot tell whether they work according to particular theories. Usually there is eclecticism, which means that they collect different experiences and then apply them to the work. The basis for these is a bio-psycho-socio-spiritual model that takes into account the integral concept of personality and the philosophy of Harm Reduction which is the main point of contact work. The research brought the views of social workers, their recommendations, and techniques that are proven by them, and also describe the pitfalls of their work. In my opinion, this work could serve as a good summary of techniques for new workers who would like to work with drug addicts. My results can also be the basis for further studies and research in this area.
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The GIS support to measures on the ground in case of leakage of liquid pollutant on the road
Kolejka, Jaromír ; Rapant, P. ; Zapletalová, Jana
Accidents on roads associated with the leakage of hazardous substances are one of the major challenges encountered by disaster management. Because of the impossibility of predicting the place and time of the event, then it is necessary in the event of such an accident to proceed in quick succession of steps. They are designed primarily to protect human life and health, and then to minimize to property and environment damage. The paper describes the response to this event using GIS tools and generally available geodata. The simulated accident on the D1 highway near Ostrava is applied as a demonstration example.
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The Finnish Landscape Photography and Its Role in Helsinki School
Bureš, Mojmír ; SILVERIO, Robert (advisor) ; Ledvina, Josef (referee)
In my bachelor thesis I am focused on the images of the Finnish landscape photography and relationship to nature due to the harsh geographical conditions. I will describe the political and cultural influences that affected the aesthetic thinking about perception of scanned landscapes. Furthermore, I would like to deal with the influence by art that have shaped and inspired the Finnish authors and compare it with the perception of the country abroad. For example Dieseldorf photography school (Bernd and Hilla Becher, Andreas Gursky), Japanese photographers (Hiroshi Sugimoto, Rinko Kawauchi) Czech photographers (Josef Sudek, Josef Koudelka) and the others .
List of the authors:
Into Konrad Inha, Caj Breme, Ismo HÖLTTÖ, Arno Rafael Minkkinen, Ilkka Halso, Maija Savolainen, Eeva Karhu, Kalle Kataila, Jyrki Parantainen, Elina Brotherus, Maanantai Collective, Mikko Rikala, Sandra Kantanen, Tiina Itkonen, Jorma Puranen, Susanna Majuri, Petri Juntunen, Eija-Liisa Ahtila, Nanna Hänninen, Pentti Sammallahti, Karl Emil Stahlberg, Riitta Päiväläinen, Marja Pirilä, Ritva Kovalainen, Sanni Seppo, Juha Suonpää
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Animal from the Garry Winogrand´s point of view
Tvarůžka, Václav ; DVOŘÁK, Tomáš (advisor) ; Ledvina, Josef (referee)
Work is an introduction to the work of Gary Winogrand and also analysis of the issue of limited possibility of looking which manifests in the particular problem, of impossibility of looking at animal. Work is based on essay from John Berger who concludes this communication problem trough the rise of capitalism and lost connection between human and animal creature. This thing is also connected to the phenomenon of zoological garden. Work is set in this certain context and further it is analyzing the photographs from Winogrand himself and also other authors, which are dealing with affinity problems like for example problem of authenticity (in the photography with the motive of animal), which is represented by Joan Fontcuberta. Or the problem of anthropomorphization (Walt Disney).
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Study of physiology and searching of proteomic tools useful in suppression and detection of Varroa destructor
Holenková, Martina ; Erban, Tomáš (advisor) ; Titěra, Dalibor (referee)
This work is focused on the study of physiology and proteome of the the mite Varroa destructor and on comparison with the honeybee Apis mellifera. Varroa is currently a major problem for beekeeping, because infects most of the colonies. The control of the mite can not be done without residues both in the hive and for example in the honey or other resources used by the man. Another problem can also be the simultaneously discussed issue of the connection with the Colony Collapse Disorder. The internal anatomy of V. destructor was studied by using paraffin histology. On histological sections stained using hematoxylin and PAS was possible to observe the mite digestive system, but also egg, ovaries or brain. The primary aim of this study was to identify the proteins of mite V. destructor and bee A. mellifera as a host of this parasite. For the electrophoretic separation was used two- dimensional gel electrophoresis, where the second dimension was carried out using 12% and 15% SDS-PAGE. The most abundant spots were selected for analysis using MALDI TOF/TOF mass spectrometry. The most abundant protein identified in samples of V. destructor was hexamerin, arginine kinase or hemelipoglycoprotein precursor. Hexamerins were also identified as the major proteins in the pupae samples. On the contrary the main...
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Dance education of preschool hyperactive children
Lacková, Ivana ; LÖSSL, Jiří (advisor) ; FRIČOVÁ, Marie (referee)
The topic of this diploma thesis is Dance education of preschool hyperactive children. Goal of research is to describe teaching of hyperactive children especially dance lessons.
There is described Attention Deficit Hyperactivity Disorder in the first part of thesis. There is written about special needs of children with ADHD focused on education.
Second part is focused on practical dance lesson of ADHD children. There is described example dance lesson based on theory and practical experience of experts.
The result of research is that supply of special lessons is very limited and it is big pity. In the diploma thesis was recognized that the education with special program should help to children with ADHD and it can be good supplement to standard medical therapy.
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Neural Networks Between Integer and Rational Weights
Šíma, Jiří
The analysis of the computational power of neural networks with the weight parameters between integer and rational numbers is refined. We study an intermediate model of binary-state neural networks with integer weights, corresponding to finite automata, which is extended with an extra analog unit with rational weights, as already two additional analog units allow for Turing universality. We characterize the languages that are accepted by this model in terms of so-called cut languages which are combined in a certain way by usual string operations. We employ this characterization for proving that the languages accepted by neural networks with an analog unit are context-sensitive and we present an explicit example of such non-context-free languages. In addition, we formulate a sufficient condition when these networks accept only regular languages in terms of quasi-periodicity of parameters derived from their weights.
Fulltext: content.csg -  PDF
Plný tet: v1237-16 - PDF
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Fish passes and their role in landscape and ecosystem management
Míka, Martin ; Horký, Pavel (advisor) ; Kuříková, Pavlína (referee)
Fishways are devices intended to restore fish migration through the transverse obstacles in fragmented flows. Basic types of fish passages can be divided into technical and close to nature. Technical as cellular or crevice between the close to nature can include, for example, a bypass channel or boulder ramps. Close to nature fishways are suitable not only for Migration wider range of species and the size of fish, but they are preferable as landscape elements in urban landscapes. Can be recommended to be close to nature when crossing streams fragmented preferred, although not necessarily their use, for example, due to space constraints at a particular location possible.
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DCTOOL-A3
Bakule, Lubomír ; Papík, Martin ; Rehák, Branislav
DCTOOL-A3 is a documentation of Matlab routines developed for the design of decentralized control of large scale complex systems. The current beta version covers three areas as follows:\nReport 4.1 deals with the event-triggered control design for unstructured uncertain systems. Both non-quantized and quantized feedback is analyzed. The results are given in terms of linear matrix inequalities (LMIs). Logarithmic quantizer is used. Numerical example illustrates the effectiveness of the presented results.\nReport 4.2 presents a new decentralized overlapping wireless control design with a switched communication protocol. The method is applied by simulations on the 20-story building structure including the test of robustness of the methods against sensor failures and network node dropouts of a digital network.\nReport 4.3 presents the construction of a new decentralized wireless controller and a set of heuristic algorithms for evaluation of packet dropouts, sensor faults and actuator faults. The digital network operates at the standard frequency used in well-known widely-used industrial protocols. The results are tested at the Benchmark model decomposed into two disjoint substructures. The results are published. Thus, the details are omitted here.
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