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A Comparison of Preconditioning Methods for Saddle Point Problems with an Application to Porous Media Flow Problems
Axelsson, Owe ; Blaheta, Radim ; Hasal, Martin
The paper overviews and compares some block preconditioners for the solution of saddle point systems, especially systems arising from the Brinkman model of porous media flow. The considered preconditioners involve different Schur complements as inverse free Schur complement in HSS (Hermitian - Skew Hermitian Splitting preconditioner), Schur complement to the velocity matrix and finally Schur complement to a regularization block in the augmented matrix preconditioner. The inverses appearing in most of the considered Schur complements are approximated by simple sparse approximation techniques as element-by-element and Frobenius norm minimization approaches. A special interest is devoted to problems involving various Darcy, Stokes and Brinkman flow regions, the efficiency of preconditioners in this case is demonstrated by some numerical experiments.
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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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The role of the nurse is to aid in the improvement of the quality of life for children who have been through meningitis
ŠPAČKOVÁ, Jana
The role of the nurse is to aid in the improvement of the quality of life for children who have been through meningitis. In recent years, the issue of quality of life has become of interest in many disciplines and the general public. In health care, the quality of life is known as HRQoL - Health Related Quality of Life - loosely translated as ?the quality of life related to health?. The term of ?diagnostic quality of life in children and adolescents? is primarily used for the area of professional health care and it is an important indicator of disease severity and the outcomes of provided care. The objective of this thesis was to assess the quality of life of children who have been through meningitis, to identify the main areas in which the quality of life of these children is reduced, and to suggest nursing interventions aimed at improvements. The data collection took place in the period November 2009 - June 2010 at the Clinic for Childhood Infectious Diseases, University Hospital Brno. A qualitative research used the technique of studying written documents and, subsequently, non-standardized in-depth interviews with respondents were carried out. Prior the beginning of the qualitative survey, five research questions were established. Question 1: What kind of care and what interventions do children expect from nurses? Question 2: What kind of care and what interventions do parents expect from nurses? Question 3: How to evaluate subjectively the quality of children?s? life after meningitis as compared to the state prior the disease? Question 4: How do parents see the quality of life of their child after meningitis as compared to the state prior the disease? Question 5: In which areas is the quality of children?s life reduced most? Question 6: What nursing interventions can help nurses to improve the children?s lives? All of the questions were answered using a quantitative research method involving a standardized questionnaire named ?HEALTH AND SATISFACTION QUESTIONNAIRE?. This questionnaire is used in the project ?QOLOP? ? Quality of Life Longitudinal Study of Paediatric Oncology Patients. Hypothesis H 1 was defined prior the start of the quantitative research: The quality of life of children who have been through meningitis is lower than in healthy children. This hypothesis was not confirmed. It is clear, from what has been mentioned above, that the objective of this thesis has been met. This project will be useful in practice. The generated ?Algorithm of Initial Care for a Child with Meningitis? and ?Subsequent Care of a Child with Meningitis? should help nurses orientate and identify the basic needs of children with this disease. Moreover, this thesis can be used as a theoretical basis for the education of nursing students.
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Relationship between electronic music and film
Švarcová, Johana ; BENDOVÁ, Helena (advisor) ; MAREK, Petr (referee)
In this work the mutual relationship between film and electronic music with particular focus on early sci-fi movies is discussed. This work is coming out from a phenomenal relationship between music and sound effects not often found outside of this genre. This topic is the rich source of an interdisciplinary overlaps and the cultural contexts, however not so much interest has been put yet to this field neither from Film or history of Electronic Music.
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Comparison of old and current cine lenses in combination with modern digital camera
Jakubec, František ; HOJDA, Petr (advisor) ; MIKŠ, Antonín (referee)
A Director of Photography has many artistic possibilities when working with cine lenses. Today, we can produce many optical effects in digital post-productions; however, working with lenses and with their defects (aberrations) is very interesting when you use them with modern recording technology. This thesis examines a small part of these issues. The theoretical part is about general qualities of optical systems, their aberrations, and measurement of picture quality. Furthermore, there is also a description of the movie camera and lenses, which were used for testing. The analytical part is about analyzing real footage from tests.
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Global Economy Outlook - November 2016
Česká národní banka
The November issue of Global Economic Outlook presents the regular monthly overview of recent and expected developments in selected territories, focusing on key economic variables: inflation, GDP growth, leading indicators, interest rates, exchange rates and commodity prices. In this issue, we also focus on the relationship between the Brent crude oil price and the US dollar exchange rate over the last ten years. The results show that the inverse relationship between the Brent price and the nominal effective exchange rate of the dollar still applies, helping dampen fluctuations in the dollar price of oil in “non-dollar” economies.
Fulltext:  PDF; PDF
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Global Economy Outlook - October 2016
Česká národní banka
The October issue of Global Economic Outlook presents the regular monthly overview of recent and expected developments in selected territories, focusing on key economic variables: inflation, GDP growth, leading indicators, interest rates, exchange rates and commodity prices. In this issue, we focus in detail on the industrial producer price index (PPI), which, alongside the consumer price index (CPI), is a key indicator of inflation on the production side of the economy. We also explain the specifics of the PPI, especially in the EU, and present a model simulation indicating the sensitivity of the PPI to a change in oil prices.
Fulltext: PDF; PDF
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Determination of content substances for selected species and varieties of roses.
Slavíková, Eva ; Sus, Josef (advisor) ; Súkeníková, Tereza (referee)
This bachelor's work is focused on comparing the most significant content substance, vitamin C, in fruits of chosen rose kinds species and varieties. Herbal products are often seen by people as products of "second choice", when failure of allopathic treatment occurs, which is focused especially on suppressing symptoms of illness, but it ignores health of the human body as whole. That's why are herbal products often alternative for therapy of chronic diseases. The base of this work is extensive literary research and results of laboratory measurings. Literary part of this work includes description of botanical classification of rose plants. There is stated basic characteristic of individual rose species and their morphological features. In following chapters is composed overview of effective substances in rose fruits and their effect on human health. In practical part of this work are included results of laboratory tests for determining ascorbic acid content for chosen samples of rose species and it also includes results of weighing and measuring of fruit samples of chosen rose species. There are also stated chosen rose species and shortly their origin and description, in the beginning of practical part. For practical part were chosen samples of species. Results of practical part are compiled into statistic tables and graphs and it confirms high content of ascorbic acid in rose fruits. This content is in range of cca 300 - 900 mg.100 g-1. Due to growing interest in alternative treatment options and "clean" natural product, it can be assumed, that many plants of Rosaceae family will keep its place in treatment practice. Those plants will be used not only for treatment of acute and chronic diseases, but also for cosmetic products production, thanks to its large effects and process options.
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Zalužanský Brook Restoration Project
Lašek, Jakub ; Kalibová, Jana (advisor)
This thesis contains restoration project of chosen section of Zalužansky brook in Ústecký kraj. Project is processed at the level of documentation for territorial management according to decree no. 499/2006, of buildings documentation. Theoretical part captures professional literature research dedicated to restorations, spatial planning and buildings documentation. Analytic segment closely defines and characterise location of interest at first, although major part consists of designed restoration measures following requirements for creating a building documentation by mentioned decree. Benefit from this thesis is it's possible usage as a background material for documentation created by authorised engineer for water management and landscape planning.
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