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36 results on '"Poletaev, D. A."'

4. APPLICATION OF DIGITAL HOLOGRAPHIC MICROSCOPY IN MONITORING MARINE POLLUTION

Author

Poletaev, D. A. and Sokolenko, B. V.

Abstract

In this paper an express method for measuring sea water pollution using digital holo-graphic microscopy is proposed. The experimental setup is described and the advantages of the proposed method are indicated. Исследование выполнено в рамках поддержанного федеральным государственным автономным образовательным учреждением высшего образования «Крымский федеральный университет имени В.И. Вернадского» гранта № ВГ12/2020.

Published
2020

5. OPTICAL TRAPPING AND MANIPULATION OF BIOLOGICAL MICRO PARTICLES WITH DIGITAL HOLOGRAPHIC VISUALIZATION

Author

Sokolenko, B. V., Shostka, N. V., and Poletaev, D. A.

Abstract

The design of optical tweezers based on uniaxial crystal anisotropy for generation of adjustable traps array carrying optical vortex with orbital angular momentum in coupling with digital holographic microscopy is considered. Исследования выполнены при поддержке стипендии Президента Российской Феде-рации молодым ученым и аспирантам № СП-745.2019.4.

Published
2020

15. Исследование логистических уравнений

Author

Boreyko, K. V., Djemesuk, I. A., and Poletaev, D. A.

Subjects
Quantitative Biology::Populations and Evolution, Astrophysics::Galaxy Astrophysics
Abstract

In this work the logistic equation of fish populations in the sea has researched by different methods, for examples, analytical method, computer method and method of determinated chaos. As result, has finded and changed boundary condition for this equation, so that the population is not on the verge of extinction.

Published
2017

16. Нанокомпонентный бактерицидный материал

Author

Poletaev, D. A. and Sokolenko, B. V.

Subjects
sense organs, skin and connective tissue diseases
Abstract

In this article bactericidal material was proposed. A key features of this material are the ability to inhibit reproduction of bacteria and not to make a change in the chemical composition and structure of the object to be preserved.

Published
2017

17. OPTICAL SCANNING PROFILOMETER

Author

Sokolenko, B. V., Poletaev, D. A., Khalilov, S., and Pogrebnaya, А. О.

Abstract

In this report we apply a new laser scanning profilometer and review principles and applications of using an optical vortex in high spatial resolution metrology at nanoscale three-dimensional regime. The phase-shifting technique with coherent Laguerre-Gaussian beams demonstrates ability to examine profile of transparent and reflecting samples with high accuracy and resolution down to 1 nm. Данная работа выполнена в рамках ГСУ-проекта «АММУР – академическая мобильность молодых ученых России» Программы развития ФГАОУ ВО «КФУ им. В.И. Вернадского».

Published
2017

34. Ab initio-based prediction and TEM study of silicide precipitation in titanium

Author

Poletaev, D. O., Lipnitskii, A. G., Kartamyshev, A. I., Aksyonov, D. A., Tkachev, E. S., Poletaev, D. O., Lipnitskii, A. G., Kartamyshev, A. I., Aksyonov, D. A., and Tkachev, E. S.

Abstract

In this work we applied our recently developed thermodynamic model to predict the structure of Ti-Si precipitates in α-Ti matrix of the Ti-Si alloy with total Si concentration of 0.7 wt.%. We considered all prominent Ti-Si phases such as Ti₃Si; Ti₅Si₃; Ti₅Si₄; TiSi and two TiSi₂ phases and discovered that formation of the Ti₅Si₃ phase is more favorable than that of the Ti₃Si in contradiction with the known phase diagrams. Theoretical result was confirmed by experimental investigation of microstructure and phase composition of the model Ti-0.7Si alloy annealed at 873 K for 10 h. Indeed, the only observed phase has hexagonal Ti₅Si₃ structure. To ensure the completeness of the results we calculated ab initio elastic constants for all considered Ti-Si phases

35. Metal-dielectric plate waveguide filter.

Author

Arsenitchev, S. P., Ahramovich, L. N., Glumova, M. V., Grigoriev, E. V., Poletaev, D. A., and Taran, E. P.

Abstract

The results of theoretical and experimental studies into metal-dielectric plate waveguide filter is described. [ABSTRACT FROM PUBLISHER]

Published
2012

36. Distribution of currents at diffraction on metal dielectric structures in a waveguide.

Author

Arsenichev, S. P., Ahramovich, L. N., Glumova, M. V., Poletaev, D. A., Starostenko, V. V., and Taran, Ye. P.

Abstract

Results of a numeral calculation of superficial currents are brought in conducting films at diffraction of the electromagnetic fields on metal dielectric structures in a waveguide. [ABSTRACT FROM PUBLISHER]

Published
2012

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