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Tymchyk G.S., Skytsiouk V.I., Klotchko T.R., Ławicki T., Demsova N. Distortion of geometric elements in the transition from the imaginary to the real coordinate system of technological equipment

Friday, 22 January 2021 12:17 administrator
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There are a number of problems in the manufacture of precision instruments related to the accuracy of the size of details, which affects the quality of the product. Therefore, it is necessary to take into account those distortions of the geometry of the element of details, which are machining, for example, on CNC machines. At work the main possible variants of deviation from geometric sizes, which lead to loss of accuracy of the detail are considered.

https://doi.org/10.1117/12.2501624

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Last Updated on Friday, 22 January 2021 12:19
 

Tymchyk G.S., Tereshchenko M.F., Liashenko O.G., Gnateiko O.S. Research on the influence of laser radiation temperature processes in biological tissues

Saturday, 02 January 2016 18:55 administrator
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Tymchyk G.S., Tereshchenko M.F., Liashenko O.G., Gnateiko O.S. Research on the influence of laser radiation temperature processes in biological tissues

In most countries of the world there is an intensive introduction of laser radiation in biological re-search and in medical practice. Increasing use of light- and laser-based treatment modalities in der-matology instigates the need for objective techniques, which can be used for both planning the treatment and evaluating the results. Effect of low-intensity laser radiation leads to rapid attenuation of acute inflammation, stimulates reparative (regenerative) processes and optimizes the microcircu-lation of tissues. Proved that low-intensity laser radiation has pronounced therapeutic effect. Studied changes in derma temperature of the person depending on derma type, as well as optical and ther-mal parameters of the derma before and after the effect of low-intensity laser radiation. There are the results of mathematical modeling of the effect of low-intensity laser radiation and obtained evi-dence the influence of low-intensity laser radiation on the human epidermis age group 20-25 years, with different derma tones, which obtained by using infrared thermography. There is the depend-ence of the temperature of the derma of two types of influence on time low-intensity laser radiation and environment temperature.
Keywords: low-intensity laser radiation (LILR), regeneration of human skin, optical and thermal properties of biological tissues.

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Volkogon V. M., Antonyuk V. S. Contribution of graphite-like boron nitride To the formation of residual stresses, Strength, and performance of materials Based on wurtzitic boron nitride

Sunday, 13 November 2011 20:08 administrator
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V. M. Volkogon, V. S. Antonyuk. Contribution of graphite-like boron nitride to the formation of residual stresses, strength, and performance of materials
Based on wurtzitic boron nitride. - Journal of Superhard Materials Vol. 23, No. 5, pp. 50-53, 2001

The paper deals with the mechanism of the formation of physico-mechanical properties of polycrystalline superhard materials based on wurtzitic boron nitride -Hexanite-A. We have studied the influence of graphite-like BN modification, which is present in Hexanite-A, on the residual stress level upon sintering, and analyzed the relationship between these stresses and the strength and performance of the polycrystalline superhard materials. The results of investigation of wBN-based material confirm the presence of residual stresses due to graphite-like boron nitride.

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