Discussion of the physical mechanism of formation of one type of stratification of the F2 region of the equatorial ionosphere

A large number of researches have been devoted to the formation of additional layers in theFregion of the equatorial ionosphere, first of which has been published in 1940s. Originally the occurrence of such layer was named “stratification of equatorialF2layer.” The additional layer was later named as theF3layer. The theoretical researches have shown that theF3layer is formed by zonal component of electric field with assistance of meridional component of thermospheric wind and field-aligned plasma diffusion. The physical mechanism of theF3layer formation is clearly formulated for the morning-noon period, although theF3layer is also observed at other hours. This paper presents a brief review into the history of the additional layer researches, describes the current progress of these researches, and identifies the most important problems in this field of the ionospheric physics.

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Regarding the mechanism of formation of nonmetallic inclusions conglomerates of system Al2O3-MgO

Ferrous Metallurgy Bulletin of Scientific Technical and Economic Information ◽

10.32339/0135-5910-2019-12-1341-1351 ◽

2019 ◽

Vol 75 (12) ◽

pp. 1341-1351

Author(s):

A. A. Safronov ◽

V. S. Dub ◽

V. V. Orlov ◽

K. L. Kosyrev ◽

A. S. Loskutov ◽

...

Keyword(s):

Nonmetallic Inclusions ◽

Mechanism Of Formation

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Assessment of ability to varnish turbine oils

World of OIL Products the Oil Companies Bulletin ◽

10.32758/2071-5951-2020-0-6-28-33 ◽

2020 ◽

Vol 06 ◽

pp. 28-33

Author(s):

I.V. Mitin ◽

◽

I.R. Tatur ◽

K.U. Smirnov ◽

A.M. Suloev ◽

...

Keyword(s):

Antioxidant Properties ◽

Mechanism Of Formation ◽

Critical Situation ◽

Antioxidant Content ◽

Turbine Equipment

The reasons for the formation of varnish deposits of turbine oils are determined. It is shown that the performance of turbine oils is determined by methods of ASTM D7843 (MPC) and ASTM D6971 (RUL) can be assessed, the process of formation of varnish deposits, the level of antioxidant properties, antioxidant content of, amend, and extend the oil change, and to predict critical situation in the operation of turbine equipment. The mechanism of formation of varnish deposits in turbine oils is proposed.

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Time Dependances of the Resistance Coefficients of Polymeric Materials

INEOS OPEN ◽

10.32931/io2016a ◽

2020 ◽

Vol 3 ◽

Author(s):

A. V. Matseevich ◽

◽

A. A. Askadskii ◽

Keyword(s):

Time Dependence ◽

Physical Mechanism ◽

Polymeric Materials ◽

Resistance Coefficient ◽

Constant Stress ◽

Time To Rupture ◽

Structure Sensitive ◽

Material Durability ◽

Resistance Coefficients ◽

Extremal Character

One of the possible approaches to the analysis of a physical mechanism of time dependence for the resistance coefficients of materials is suggested. The material durability at the constant stress is described using the Zhurkov and Gul' equations and the durability at the alternating stress—using the Bailey criterion. The low strains lead to structuring of a material that is reflected in a reduction of the structure-sensitive coefficient in these equations. This affords 20% increase in the durability. The dependence of the resistance coefficient assumes an extremal character; the maximum is observed at the time to rupture lg tr ≈ 2 (s).

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