National Repository of Grey Literature 3 records found  Search took 0.00 seconds. 
Portfolio diversification
ČERNÝ, Oldřich
The work deals with the diversification of the stock portfolio. Diversification is the di-vision of the portfolio into different investment instruments, into companies from different fields in different countries. The data was drawn from https://finance.yahoo.com. The companies on the market we-re selected using stock screening, according to several recommended criteria (price / profit ratio, price / book ratio, current ratio, debt to equity, market capitalization, region). Screener selected 26 companies, from which the final 10 companies were selected. For selected compa-nies, data for the last 5 years were downloaded from the monthly closing prices of shares from 1 March 2016 to 1 March 2021. First, the monthly and annual returns and risk of individual shares were calculated. Subsequently, the monthly return on the portfolio was calculated with a weight of 10% for each action. To calculate the risk of the portfolio portfolio, it was necessary to calculate the covariance and the correlation coefficient. Finally, the MS Excel solver was used, which looks for the minimum and maximum value. When using this add-on, it was necessary to specify restrictive calculation criteria. The sum of the weights of individual shares must be equal to 100%, it must be positive and calculated with the minimum risk at the given return, or the highest return with the given risk. The solver determines the portfolio with the lowest risk and the highest return, which will form the upper and lower limit of the allowable portfolios. The researcher also counts on 15 portfolios with the maximum return and the given risk. The risk was calculated from the lower limit to the upper one by one percent. The investor decides for each portfolio that meets his risk and return requirements. Whether he prefers a high return with a given level of risk, or a low risk with a given rate of return.
Antikorozní ochrana svarů u konstrukčních materiálů
Černý, Oldřich
This master´s thesis is divided into two parts - theoretical and practical. The first section of the theoretical part lists welding techniques and mentions the problematic of robot welding. The second section deals with corrosion and types of corrosion degradation. Third and final section discusses the current trends in anticorrosive protection, with special focus on several of them. The practical part applies the theory in from of experiment. Selected anticorrosive protection systems were applied to test samples, which contained a weld. The samples were exposed to accelerated corrosion in salt fog and several other experiments. The samples were then subjected to a tensile test so that the effect of corrosion damage to the weld strength could be measured.
Využití metody svařování v ochranné atmosféře aktivního plynu ve strojírenské praxi
Černý, Oldřich
The aim of this bachelor thesis is joining metals by welding, namely metal active gas welding. The first part is dedicated to different methods of welding in engineering practice and describes the best-known methods and principles in detail. The second part focuses on the selected welding process. It explains the principle of the method, metal transfer from the electrode to the parent material and describes the welding equipment used for this method. The final part deals with filler materials, active gases and parent materials used in practice.

See also: similar author names
3 ČERNÝ, Oldřich
47 ČERNÝ, Ondřej
47 Černý, Ondřej
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