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Reliability Problems in Methods of Residual Creep Life Assessment
Kloc, Luboš ; Sklenička, Václav
The service life of components designed to operate for long periods under loading at elevated temperatures is limited by the creep deformation and fracture phenomena. Possibility of a reliable prediction of the residual creep life is of major practical and economical relevance. A number of approaches has been used for the estimation of the creep damage and residual life; these approaches could be divided into two principal branches. The microscopic methods are based on the microstructural observations of accumulated damage in the samples of material after service, while macroscopic meth- ods use mechanical testing of the samples under some reference conditions. However, both approaches still do not provide enough reliable results for wide practical use, be- cause of result scatter and missing generally applicable models for the creep damage evolution. The most important factors which make the results unreliable are analyzed in the present paper. These are mainly: i) production scatter in the material's properties, ii) inhomogeneity of the material, iii) sampling problem in microscopic methods, iv) extrapolations involved in macroscopic methods. Some suggestions to overcome these problems are made and the need for a new approach and new experimental techniques is presented.
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Description of the older school age boys dental injuries in České Budějovice region and proposal of the health education materials.
TOBOLKOVÁ, Andrea
Thesis deals with the problem of the older school age boys dental injuries in České Budějovice region. The injury means: ?sudden damage of the health by effect of external factors which exceed adaptation options of the human body?. In the sphere of dental injuries the children is the most jeopardized group of population. The most often reason for the children injuries is their imperfect stability. In case of older children and young people there are injuries mostly caused by sport. Teoretical part of my thesis is focused on definition of older school age as well as on anatomy and teeth physiology. The part of thesis also is the enumeration of dental injuries and its treatment. I also mention prosthetic dentistry and the influence of accidents on individual physical and mental health. At the end of teoretical part there is mentioned process of the injured examination, posttraumatic dental hygiene and patient nutrition after teeth accident. Research part finds with the help of questionnaire survey the kinds of dental accidents, circumstances of injuries formation and the influence of accidents on individual physical and mental health in specific age category. The questionnaire survey was evaluated and processed in grafical part of thesis. The part of thesis also is health and educational material which helps to rise the quality of dental hygiene and also contributes to the prevention of dental accidents formation of second degree students at primary schools.
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Alzheimer's dementia in the family - use of services of a day care and a week care centre
KOVAŘÍKOVÁ, Jaroslava
The thesis focuses on care of clients with Alzheimer's, including the burden of family members and possible options of using services of a day care and a week care centre. The theoretical part of the thesis deals with Alzheimer's disease together with nursing care, health care system in the Czech Republic and possibility to use services of day care and week care centres. In the empirical part of the thesis the method of qualitative research was used. A non standardized interview was applied as a method of questioning. The results of the qualitative research clearly show that the care for clients with Alzheimer's dementia represents a major burden for family members who care for the ill and in connection with the care provided they have to tackle following problems. They have to cope with the gradual deterioration of memory of the ill, which is associated with occasional forgetfulness, disorientation, wandering around. Another problem is to handle in an acceptable way the change of behaviour of their loved ones who often attack them both verbally and physically. Family members help patients with feeding, emptying, hygiene and grooming. They must solve the difficulties with activation of patients including memory exercises, they watch whether the patients swallow the medication. The conclusions of the thesis show that family members have to deal with many above mentioned problems when providing care for their loved ones. They themselves are tired and exhausted due to the care they provide, which is related to the incidents of their own health problems. They neglect themselves and their families, it is difficult for them to coordinate the care with their job and often come to work sleepy. For these reasons they would like to use services of day care and week care centres. It eases them of the burden of care, which they see as a benefit. The research revealed the expected services of the day care centre including expected nursing care. The research results were presented to the management of the Aftercare Hospital in Humpolec as it had planned to open a day care centre for patients with Alzheimer's dementia. Furthermore, the results served as a basis for the seminar for potential applicants, who would like to work in the centre. Based on information obtained in the course of writing of the thesis, a draft of the brochure was created which would serve as information material for family members of clients with Alzheimer's including the patients themselves.
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Optimalization of material flow in automotive industry
Kolář, Tomáš ; Jirsák, Petr (advisor) ; Vinš, Marek (referee)
This master thesis is focussed on optimalization of material flow in an automotive company. First part introduce theoretical background. Automotive industry and its actual trends on global markets. Follows short introduction of the company where project of this thesis was executed. Main theoretical part describes concept of lean management, its tools in practical examples, but it is also focussed on philosophical approach to the work and mindset of the company. Follows the aplication part based on theoretical background. The whole project of this master thesis is focussed on specific area called PC store. At first this area is showed in context of overall material flow. Shortly there are introduced processes and areas where full material packaging flows. Follows deeper analysis and optimalization of PC store itself. There are three approaches of stock and lead time reduction applied. Last part shows the comparison of initial and future state including performed changes.
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STRAIN ENGINEERING OF THE ELECTRONIC STRUCTURE OF 2D MATERIALS
del Corro, Elena ; Peňa-Alvarez, M. ; Morales-García, A. ; Bouša, Milan ; Řáhová, Jaroslava ; Kavan, Ladislav ; Kalbáč, Martin ; Frank, Otakar
The research on graphene has attracted much attention since its first successful preparation in 2004. It possesses many unique properties, such as an extreme stiffness and strength, high electron mobility, ballistic transport even at room temperature, superior thermal conductivity and many others. The affection for graphene was followed swiftly by a keen interest in other two dimensional materials like transition metal dichalcogenides. As has been predicted and in part proven experimentally, the electronic properties of these materials can be modified by various means. The most common ones include covalent or non-covalent chemistry, electrochemical, gate or atomic doping, or quantum confinement. None of these methods has proven universal enough in terms of the devices' characteristics or scalability. However, another approach is known mechanical strain/stress, but experiments in that direction are scarce, in spite of their high promises.\nThe primary challenge consists in the understanding of the mechanical properties of 2D materials and in the ability to quantify the lattice deformation. Several techniques can be then used to apply strain to the specimens and thus to induce changes in their electronic structure. We will review their basic concepts and some of the examples so far documented experimentally and/or theoretically.
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San Minn (or) An Artist who prefer creating and paintings than his life
Zeya, Pyin Nyar ; JANEČEK, Vít (advisor) ; VOJTĚCHOVSKÝ, Miloš (referee)
No one can control a painter artist’s freely thoughts and ideas and although his paintings were under the high pressure and banned by force, the artistic value of his materials never go down. So that I am writing this paper.
He, San Minn has broken out the mainstream of Burmese painting field, he never made business paintings as well. He keeps his belief on the art of paints and he is always finding for the new way to make his paintings. His materials are very different from other Burmese painter artists’ materials. His style is unique in Burmese paintings. So I can get a chance to study of his style, ideas, ways of thinking and his determination on the art works.
My paper can show a painter artist’s life who grew up under the military rule for 50 years and the situation and history of Burmese painting field. Then not only people who are studying the painting subject, but also other people can know about the subject of Burmese painting and field of artists. I dare say that my paper must be colorful and fruitful.
As a painter artist, it seems that he wants his audience to feel his materials but he rare to show his real life behind the pictures. For me, I can get a chance to know about his real life for my thesis paper.
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Thesis Statement
My thesis can be useful for everybody who is interested in Burmese contemporary art field.
This is the biggest chance to read about one of the most famous, important and significant artists and art movements of Burma. His paintings are reflecting his journey through over 40 years of censorship, but he was not afraid to tackle political and social issues.
Many of San Minn's art works are based on autobiographical, making sharp social commentary on the popular culture, social values and scenario circumstances where he has lived in.
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Plasma spraying from liquids: plasma liquid interaction and coating build up
Tesař, Tomáš ; Mušálek, Radek ; Medřický, Jan ; Lukáč, František
Plasma spraying from liquid feedstocks is a rapidly developing field of thermal spraying since the coatings prepared from liquids exhibit some unique features, such as high hardness, thermal shock resistance or low thermal and electric conductivity. The key factor influencing the final coating character and properties is the input material which may be in the form of a suspension or a solution. Parameters of the selected suspension (solids concentration, viscosity, surface tension, chemical composition, etc.) or solution (concentration, etc.) determine its interaction with the plasma jet which strongly influences the coating buildup. This proceeding introduces the problematics of the interaction between the liquid feedstock material with the plasma jet and presents the way of evaluation of the coating buildup.
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The Contrast of life and death in works of J. K. Šlejhar
Krčálová, Tereza ; Heczková, Libuše (advisor) ; Mravcová, Marie (referee)
The thesis focuses on J. K. Šlejhar's literary work from two points of view. The first part introduces Šlejhar's work in the contemporary literary context as a result of a synthesis of new literary styles. In the second part the thesis concentrates on a textual analysis and reconstruction of the author's "artistic world". The first part of the thesis gives insight into the contemporary discussions aimed at revising and redefining the function of art with respect to the new development in society and new human needs. The critical reception of realism and naturalism and the reflection of the then wide-spread adoption of new influences from foreign literatures are also dicussed. To draw a comparison, we quote both period and current studies dealing with J. K. Šlejhar's work. Thereby we want to demonstrate the changing requirements of literature and art and the changing perception of a literary work throughout time. The second part of the thesis comprises the textual analysis of Šlejhar's selected writings from the point of view of semiotic literary theory and the reconstruction of the author's "artistic world". Such approach enables us to draw comparisons to Russian literature of the 19th century, primarily with the works of N. V. Gogol and F. M. Dostoyevsky, and to discover a common basis for both...
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