Transformation diagrams of selected steel grades with consideration of deformation effect

The aim of this article was to assess the effect of previous plastic deformation on the transformation kinetics of selected steels with a wide range of chemical composition. Transformation (CCT and DCCT) diagrams were constructed on the basis of dilatometric tests on the plastometer Gleeble 3800 and metallographic analyses supplemented by measurements of HV hardness. Effect of previous deformation on transformation was evaluated of the critical rate of formation of the individual structural components (ferrite, pearlite and bainite) in the case of formation of martensite respect to M-s temperature. Previous plastic deformation accelerated especially diffuse transformations (ferrite and pearlite), temperature of M-s was lower after previous plastic deformation and bainitic transformation was highly dependent on the chemical composition of steel.Web of Science631605

The influence of a cooling rate on the evolution of microstructure and hardness of the steel 27MnCrB5

The aim of the performed experiments was to determine the influence of a cooling rate on the evolution of microstructure and hardness of the steel 27MnCrB5. By using dilatometric tests performed on the plastometer Gleeble 3800 and by using mathematical modelling in the software QTSteel a continuous cooling transformation diagram for a heating temperature of 850 degrees C was constructed. Conformity of diagrams constructed for both methods is relatively good, except for the position and shape of the ferrite nose. The values of hardness, temperatures of phase transformations and the volume fractions of structural phases upon cooling from the temperature of 850 degrees C at the rate from 0.16 degrees C.s(-1) to 37.2 degrees C.s(-1) were determined. Mathematically predicted proportion of martensite with real data was of relatively solid conformity, but the hardness values evaluated by mathematical modelling was always higher.Web of Science63291490

Influence of fall height on high impact polystyrene deformation and characteristics of drop weight test

This study deals with high impact polystyrene (HIPS) which was subjected the drop-weight test. HIPS is a polymer produced by the reaction between butadiene synthetic elastomer and styrene (5-14 %) which contains the crystal polymer in certain amounts and is commonly used in mechanical engineering applications where machine parts are exposed to impact loading. The injection moulded HIPS samples were subjected the penetration test at different fall heights and the results were subsequently evaluated and discussed. It was found out that all fall heights are suitable for HIPS penetration, but the optimal one is 50 J because of the smallest variation range. Higher heights are not needed because of increasing power consumption of the test device. From the results, it is clear, that HIPS is not so highly impact resistant material as for example HDPE, because of that is this material suitable for applications where is not often exposed to too big impacts at high velocities. © The Authors, published by EDP Sciences, 2017

Impact resistance of high-density polyethylene against falling penetrator with different potential energy

This study deals with high-density polyethylene (HDPE) which was subjected the drop-weight test. HDPE is a semicrystalline thermoplastic polymer which is commonly used in many applications and mainly in the automotive industry because of its properties. The injection moulded HDPE samples were subjected the penetration test at different potential energies and the results were subsequently evaluated and discussed. The samples were tested in the range of potential energies from 30 to 230 J. The first sample penetration occurred at the energy 50 J. It was found out that the potential energy 30 J is too small for penetration of this material, which shows the impact resistance of HDPE. © The Authors, published by EDP Sciences, 2017

Network analysis for uncovering the relationship between host response and clinical factors to virus pathogen: Lessons from SARS-CoV-2

Analysing complex datasets while maintaining the interpretability and explainability of outcomes for clinicians and patients is challenging, not only in viral infections. These datasets often include a variety of heterogeneous clinical, demographic, laboratory, and personal data, and it is not a single factor but a combination of multiple factors that contribute to patient characterisation and host response. Therefore, multivariate approaches are needed to analyse these complex patient datasets, which are impossible to analyse with univariate comparisons (e.g., one immune cell subset versus one clinical factor). Using a SARS-CoV-2 infection as an example, we employed a patient similarity network (PSN) approach to assess the relationship between host immune factors and the clinical course of infection and performed visualisation and data interpretation. A PSN analysis of similar to 85 immunological (cellular and humoral) and similar to 70 clinical factors in 250 recruited patients with coronavirus disease (COVID-19) who were sampled four to eight weeks after a PCR-confirmed SARS-CoV-2 infection identified a minimal immune signature, as well as clinical and laboratory factors strongly associated with disease severity. Our study demonstrates the benefits of implementing multivariate network approaches to identify relevant factors and visualise their relationships in a SARS-CoV-2 infection, but the model is generally applicable to any complex dataset.Web of Science1411art. no. 242

Evaluation of effectiveness of selected methods of fundamental analysis on a sample of Russian stocks

The diploma thesis is focused on testing of effectiveness of selected methods of fundamental analysis on a sample of Russian stocks. The introductory part lists briefly different ways of describing changes of stock prices. The second chapter explains key principles of fundamental analysis with focus on models which are used for determination of intrinsic value of stocks, and the necessary inputs. The following chapter describes development of Russian stock market in last two decades. The last chapter includes stock evaluation of nine Russian companies at the end of 2007 via DCF equity model and dividend discount models. Effectiveness of this analysis is then evaluated by comparison of particular stock return with return of the market portfolio represented by the MICEX index during the three-year time

Quality assessment of management accounting implementation in ČSOB

Diplomová práce se zabývá využitím informací manažerského účetnictví v odpovědnostním řízení. V první části jsou vymezeny předpoklady pro účinné fungování odpovědnostního řízení (organizační struktura, míra (de)centralizace, ekonomická struktura) a hodnotové nástroje uplatňované při řízení odpovědnostních středisek. Další část práce se zaměřuje na analýzu odpovědnostního řízení v ČSOB. Cílem práce je zhodnotit současné vývojové tendence odpovědnostního řízení, hodnoticím způsobem popsat systém řízení po linii odpovědnosti v ČSOB a navrhnout změny ke zvýšení jeho účinnosti.The thesis deals with the use of management accounting information in responsibility management. The first part of the thesis defines the conditions for the effective functioning of the responsibility management (organizational structure, the degree of (de)centralization, economic structure) and value tools used in managing responsibility centers. Another part focuses on the analysis of responsibility management in the bank ČSOB. The aim is to assess current trends in responsibility management, describe and evaluate responsibility management system of ČSOB and suggest changes to improve its efficiency

Analysis of state aid of financial products

This bachelor thesis is dedicated to the state aid of financial products and its role in the Czech Republic. Analysis of state aid is focused on products building savings, additional pension insurance, life insurance and loans for house purchase. Product support is important for the client as appreciation of a financial product, it is the competitive advantage of the financial institution in the financial market, the state serves as a tool to achieve goals in public policy and the state aid is applicated more in the Czech Republic than in the Slovak Republic