Abstract. Purpose: to substantiate, work out and experimentally prove modified test for assessment of students' with health problems functional potentials. Material: in the research students and girl students of 18-20 years' age (n=522) participated. According to the worked out modification of test during 30 seconds student ascended on bench (h=43 cm) and descended from it. Then pulse was measured three times. In total the test took 4 minutes. Results: For working out the scale for interpretation of the received results we assessed new 30 seconds' modification of Harvard step-test for validity. First, for this purpose all students fulfilled modified step-test. Then after full restoration (after 20 minutes) they fulfilled its three minutes' variant. Correlation analysis of the received results showed the presence of average correlation between two samples (r=0.64). Conclusions: application of this modified variant permits for pedagogues to completely assess functional potentials of students with heath problems.
In the present study, a new multi-chamber detonation sprayer (MCDS) was used to deposit Al2O3 coatings on titanium and carbo steel substrates. SEM, TEM, and XRD analysis of the layer between the coating and substrate revealed the presence of an intermetallic compound that improves coating properties and is conducive to the relaxation of stresses generated during spraying.
The paper presents a method of producing a ceramic metal composite target by detonation gas-thermal spraying allowing spraying almost any powder compositions with high deposition efficiency of up to 90% and the possibility of spraying large areas at a relatively low cost, differentiation by coating thickness and size. The efficiency of detonation technology and related devices for the production of original composite cathodes for magnetron sputtering using the example of the powder composition Ni + Cr + B4C is justified. These materials make it possible to obtain composite coatings with a unique composition and characteristics using a magnetron. Magnetron sputtering is one of the most suitable methods for the industry. The influence of the process mode of metal ceramic powder application on copper substrate is considered. The structure of a metal-ceramic composite target was studied by scanning electron microscopy. It was shown that the target surface is dense without visible pores. The elemental composition of the powder is uniformly distributed over the target surface.
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