Zobrazeno 1 - 10
of 289
pro vyhledávání: '"Andrey A. Dmitriev"'
Autor:
Diana O. Gagarinova, Semyon A. Plyastsov, Larisa L. Lesnykh, Andrey A. Dmitriev, Ianina D. Tokareva, Sofya D. Bochkova
Publikováno v:
Naučno-tehničeskij Vestnik Informacionnyh Tehnologij, Mehaniki i Optiki, Vol 20, Iss 6, Pp 780-785 (2020)
Subject of Research. The paper presents experimental results of the chemical etching duration impact on the tilted fiber Bragg grating transmission spectrum. The goal of this research is the sensitivity growth of the tilted fiber Bragg grating aimed
Externí odkaz:
https://doaj.org/article/345d854468644a30befafb6781737dd3
Autor:
Ianina D. Tokareva, Yuri A. Konin, Kirill A. Konnov, Sergey V. Varzhel, Andrey A. Dmitriev, Sofya D. Bochkova
Publikováno v:
Naučno-tehničeskij Vestnik Informacionnyh Tehnologij, Mehaniki i Optiki, Vol 20, Iss 4, Pp 494-499 (2020)
Subject of Research. The paper presents experimental findings of a fiber-optic diffuser structure formed by optical fiber melting. Method. An optical scheme of ytterbium fiber laser is demonstrated consisting of such main components as: a laser pump
Externí odkaz:
https://doaj.org/article/f06b860420b44d96b8752d3740f8b972
Autor:
Kirill A. Konnov, Yulia I. Slozhenikina, Alexey I. Gribaev, Sergey V. Varzhel, Victoria A. Novikova, Yulia K. Zalesskaya, Andrey A. Dmitriev
Publikováno v:
Naučno-tehničeskij Vestnik Informacionnyh Tehnologij, Mehaniki i Optiki, Vol 17, Iss 6, Pp 1004-1010 (2017)
Subject of Research. The paper presents the study of inscription process distinctive features for superimposed fiber Bragg gratings. We analyzed spectral characteristics changes of superposition segregated gratings that appear during inscription of
Externí odkaz:
https://doaj.org/article/ecd6365a74b04d01b43534cb548c60c3
Autor:
Pavel S. Glushakov, Andrey P. Dmitriev
Publikováno v:
Studia Litterarum, Vol 8, Iss 1, Pp 382-397 (2023)
The publication is a reproduction of twenty book inscripts by Yu.M. Lotman from the library of B.F. Egorov. These inscriptions on books, magazines and reprints of articles form a kind of dialogical form, definitely reminiscent of epistolary communica
Externí odkaz:
https://doaj.org/article/d29ed0aa0d4c4bfa806ead89da94856f
Autor:
Danil V. Serbin, Andrey N. Dmitriev
Publikováno v:
Записки Горного института, Vol 257, Pp 833-842 (2022)
During the seasonal work of the 64th Russian Antarctic Expedition in 2018-2019 at the “Vostok” drilling facility named after B.B.Kudryashov (“Vostok” station, Antarctic) specialists of Saint Petersburg Mining University conducted experimental
Externí odkaz:
https://doaj.org/article/fb5393829287405babf5ae3c2e3a702b
Publikováno v:
Heliyon, Vol 9, Iss 4, Pp e15315- (2023)
Introduction: To date, there is no unified approach to the lobar, zonal, and segmental structure of the kidney vasculature. There is no recognizable approach to define basic characteristics in regard to the lobes and segments identifying of the kidne
Externí odkaz:
https://doaj.org/article/02edabdf95984e68b3cc6781c10246b4
Publikováno v:
Magnetochemistry, Vol 9, Iss 10, p 212 (2023)
To study the influence of sinter basicity on the microstructure, phase composition, and physicochemical and metallurgical properties, samples of agglomerates with different basicities were sintered and investigated. A comprehensive study of the struc
Externí odkaz:
https://doaj.org/article/4e73ab38483a4302b152e5e27b844daa
Modeling Wear and Friction Regimes on Ceramic Materials with Positive and Negative Thermal Expansion
Publikováno v:
Lubricants, Vol 11, Iss 9, p 414 (2023)
Computer modeling of rubbing between two surfaces with microasperities capable of expanding or contracting under conditions of frictional heating (i.e., possessing either positive and negative coefficient of thermal expansion (CTE)) allowed for the i
Externí odkaz:
https://doaj.org/article/94e5256e3c084e8daed13c5b372c94d8
Publikováno v:
Metals, Vol 13, Iss 8, p 1483 (2023)
The present paper reports the results of the comparative study of mechanical properties of sintered disperse-strengthened Al–40Sn alloy depending on the method of reinforcing particle introduction. The study is performed on two mixtures of aluminum
Externí odkaz:
https://doaj.org/article/2aeeff3a1d2845f0ae2810b6e041ef91
Autor:
Wael M. Badawy, Mohamed Mitwalli, Andrey Yu. Dmitriev, Olesia Chepurchenko, Gehad Saleh, Ali El-Farrash, Maksim Bulavin, Tarek Morsi, Mohammed Sallah
Publikováno v:
Applied Sciences, Vol 13, Iss 7, p 4564 (2023)
The present work was carried out to determine the elemental composition of granitoid rock samples from three gold mines (Sukari, Hamash, and Um Hagalig) in the South-eastern part of Egypt and quantification of the extent of the elemental enrichment.
Externí odkaz:
https://doaj.org/article/9c1022b40c2343ac9809b46b37333136