62 research outputs found
Gravitomagnetic Effects in the Propagation of Electromagnetic Waves in Variable Gravitational Fields of Arbitrary-Moving and Spinning Bodies
Propagation of light in the gravitational field of self-gravitating spinning
bodies moving with arbitrary velocities is discussed. The gravitational field
is assumed to be "weak" everywhere. Equations of motion of a light ray are
solved in the first post-Minkowskian approximation that is linear with respect
to the universal gravitational constant . We do not restrict ourselves with
the approximation of gravitational lens so that the solution of light geodesics
is applicable for arbitrary locations of source of light and observer. This
formalism is applied for studying corrections to the Shapiro time delay in
binary pulsars caused by the rotation of pulsar and its companion. We also
derive the correction to the light deflection angle caused by rotation of
gravitating bodies in the solar system (Sun, planets) or a gravitational lens.
The gravitational shift of frequency due to the combined translational and
rotational motions of light-ray-deflecting bodies is analyzed as well. We give
a general derivation of the formula describing the relativistic rotation of the
plane of polarization of electromagnetic waves (Skrotskii effect). This formula
is valid for arbitrary translational and rotational motion of gravitating
bodies and greatly extends the results of previous researchers. Finally, we
discuss the Skrotskii effect for gravitational waves emitted by localized
sources such as a binary system. The theoretical results of this paper can be
applied for studying various relativistic effects in microarcsecond space
astrometry and developing corresponding algorithms for data processing in space
astrometric missions such as FAME, SIM, and GAIA.Comment: 36 pages, 1 figure, submitted to Phys. Rev.
Baikal-GVD
We present the status of the Gigaton Volume Detector in Lake Baikal (Baikal-GVD) designed for the detection of high energy neutrinos of astrophysical origin. The telescope consists of functionally independent clusters, sub-arrays of optical modules (OMs), which are connected to shore by individual electro-optical cables. During 2015 the GVD demonstration cluster, comprising 192 OMs, has been successfully operated in Lake Baikal. In 2016 this array was upgraded to baseline configuration of GVD cluster with 288 OMs arranged on eight vertical strings. Thus the instrumented water volume has been increased up to about 5.9 Mtons. The array was commissioned in early April 2016 and takes data since then. We describe the configuration and design of the 2016 array. Preliminary results obtained with data recorded in 2015 are also discussed
The Digital Twin and Optimization of Cast Metal Structures in Additive Manufacturing
A review of a number of sources of information shows that among the advanced technologies CD is an integrator of almost all "end-to-end" digital technologies, acts as a driver, provides the prerequisites for development and allows companies and entire industries to move to sustainable development. CD technology has great prospects because it is necessary not only for the creation and operation of a modern "smart" product, but also for its regular maintenance, updating and constant adaptation to new requirements and conditions with the transfer of accumulated data and methods to create new machines, structures and materials.ΠΠ΅ΡΠΎΡ ΡΡΠ°ΡΡΡ Ρ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½Π½Ρ ΠΎΠ³Π»ΡΠ΄Ρ ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΡΠΉ Π¦Π ΡΠ° ΡΠΎΠ·ΡΠΎΠ±ΠΊΠ° ΠΏΡΠΎΠΏΠΎΠ·ΠΈΡΡΠΉ Π·Π°ΡΡΠΎΡΡΠ²Π°Π½Π½Ρ ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΡΠΉ Π¦Π Π΄Π»Ρ ΠΎΠΏΡΠΈΠΌΡΠ·Π°ΡΡΡ Π»ΠΈΡΠΈΡ
ΠΌΠ΅ΡΠ°Π»ΠΎΠΊΠΎΠ½ΡΡΡΡΠΊΡΡΠΉ ΠΏΡΠΈ Π°Π΄ΠΈΡΠΈΠ²Π½ΠΎΠΌΡ Π²ΠΈΡΠΎΠ±Π½ΠΈΡΡΠ²Ρ. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΠΈ. ΠΠ΄Π½ΠΈΠΌ ΡΠ· ΡΡΡΠ°ΡΠ½ΠΈΡ
ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΡΡΠ½ΠΈΡ
ΡΡΠ΅Π½Π΄ΡΠ² Ρ Β«ΡΠΈΡΡΠΎΠ²ΡΠ·Π°ΡΡΡΒ» ΠΏΡΠΎΡΠ΅ΡΡΠ² Π²ΠΈΡΠΎΠ±Π½ΠΈΡΡΠ²Π°, ΠΎΡΠΎΠ±Π»ΠΈΠ²ΠΎΡΡΡ ΡΠΊΠΎΡ Π΄Π»Ρ ΠΎΡΡΠΈΠΌΠ°Π½Π½Ρ Π»ΠΈΡΠΈΡ
ΠΌΠ΅ΡΠ°Π»ΠΎΠΊΠΎΠ½ΡΡΡΡΠΊΡΡΠΉ Π°Π΄Π΄ΠΈΡΠΈΠ²Π½ΠΈΠΌΠΈ ΠΌΠ΅ΡΠΎΠ΄Π°ΠΌΠΈ ΡΠΎΠ·Π³Π»ΡΠ΄Π°ΡΡΡΡΡ Π² ΡΡΠ°ΡΡΡ. ΠΠΈΠΊΠΎΠ½Π°Π½ΠΎ ΠΎΠ³Π»ΡΠ΄ ΠΏΠΎΠ½ΡΡΡΡ Π¦Π, ΡΠΎΠ·Π³Π»ΡΠ½ΡΡΠΎ ΡΠΊΡ ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΡΡ ΡΠΎΠ·ΠΊΡΠΈΠ²Π°ΡΡΡ ΡΠ΅ ΠΏΠΎΠ½ΡΡΡΡ, Π° ΡΠ°ΠΊΠΎΠΆ ΡΠΊ Π·Π°ΡΡΠΎΡΡΠ²Π°Π½Π½Ρ Π¦Π Π²ΠΏΠ»ΠΈΠ²Π°Ρ Π½Π° ΡΠΎΠ·Π²ΠΈΡΠΎΠΊ Π°Π΄ΠΈΡΠΈΠ²Π½ΠΎΠ³ΠΎ Π²ΠΈΡΠΎΠ±Π½ΠΈΡΡΠ²Π° ΠΌΠ΅ΡΠ°Π»ΠΎΠ²ΠΈΡΠΎΠ±ΡΠ². ΠΠ»Ρ ΠΊΠΎΠ½ΡΡΡΡΡΠ²Π°Π½Π½Ρ ΠΌΠ΅ΡΠ°Π»ΠΎΠΏΡΠΎΠ΄ΡΠΊΡΡΡ Π²ΡΠ΄Π·Π½Π°ΡΠ΅Π½ΠΎ ΡΠ°ΠΊΡ ΠΏΠΎΠ½ΡΡΡΡ, ΡΠΊ Β«Π±ΡΠΎΠ½ΡΡΠ½ΠΈΠΉ Π΄ΠΈΠ·Π°ΠΉΠ½Β» ΡΠ° Β«Π³Π΅Π½Π΅ΡΠ°ΡΠΈΠ²Π½ΠΈΠΉ Π΄ΠΈΠ·Π°ΠΉΠ½Β», ΡΠΊΡ Π·ΠΌΡΠ½ΡΡΡΡ Ρ
Π°ΡΠ°ΠΊΡΠ΅Ρ Π²Π·Π°ΡΠΌΠΎΠ΄ΡΡ Π»ΡΠ΄ΠΈΠ½ΠΈ Π· ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΎΡ, ΡΠΎ ΡΡΠ°Ρ Π΅ΡΠ΅ΠΊΡΠΈΠ²Π½ΠΈΠΌ ΡΠ½ΡΡΡΡΠΌΠ΅Π½ΡΠΎΠΌ ΡΠ²ΠΎΡΡΠΎΠ³ΠΎ ΠΏΡΠΎΡΠ΅ΡΡ. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ ΠΏΡΠΈΠΊΠ»Π°Π΄ΠΈ ΠΊΠΎΠΌΠΏ'ΡΡΠ΅ΡΠ½ΠΎΠ³ΠΎ ΡΠ½ΠΆΠΈΠ½ΡΡΠΈΠ½Π³Ρ ΠΏΡΠΈ ΡΠΎΠΏΠΎΠ»ΠΎΠ³ΡΡΠ½ΡΠΉ ΠΎΠΏΡΠΈΠΌΡΠ·Π°ΡΡΡ ΠΊΠΎΠ½ΡΡΡΡΠΊΡΡΠΉ ΠΌΠ΅ΡΠ°Π»Π΅Π²ΠΈΡ
Π·Π°Π³ΠΎΡΠΎΠ²ΠΎΠΊ.ΠΠΊΡΡΠ°Π»ΡΠ½ΠΎΠΉ Π·Π°Π΄Π°ΡΠ΅ΠΉ ΠΈΠ½ΠΆΠ΅Π½Π΅ΡΠ½ΠΎΠΉ Π½Π°ΡΠΊΠΈ ΡΠΎΡΡΡΠ΄Π½ΠΈΡΠ΅ΡΡΠ²ΠΎ ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠ°Π·Π²ΠΈΡΠΈΡ Π½Π°ΡΠΈΠΎΠ½Π°Π»ΡΠ½ΠΎΠΉ ΡΠΊΠΎΠ½ΠΎΠΌΠΈΠΊΠΈ, ΠΌΠΎΠ΄Π΅ΡΠ½ΠΈΠ·Π°ΡΠΈΠΈ Π΅Π΅ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΡΠ½ΡΡ
ΠΈ ΡΠ΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΈΡ
Π±Π°Π· Ρ ΡΠ°Π·Π²ΠΈΡΠΈΠ΅ΠΌ ΠΏΠ΅ΡΠ΅ΡΠ°Π±Π°ΡΡΠ²Π°ΡΡΠ΅ΠΉ ΠΏΡΠΎΠΌΡΡΠ»Π΅Π½Π½ΠΎΡΡΠΈ. ΠΠ΄Π½ΠΈΠΌ ΠΈΠ· ΡΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΡΡ
ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΡΠ΅Π½Π΄ΠΎΠ² ΡΠ²Π»ΡΠ΅ΡΡΡ Β«ΡΠΈΡΡΠΎΠ²ΠΈΠ·Π°ΡΠΈΡΒ» ΠΏΡΠΎΡΠ΅ΡΡΠΎΠ² ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄ΡΡΠ²Π°, ΠΎΡΠΎΠ±Π΅Π½Π½ΠΎΡΡΠΈ ΠΏΡΠΎΡΠ²Π»Π΅Π½ΠΈΠΉ, ΠΊΠΎΡΠΎΡΡΠ΅ Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΏΠΎΠ»ΡΡΠ΅Π½ΠΈΡ Π»Π΅ΡΠ½ΠΈΡ
ΠΌΠ΅ΡΠ°Π»Π»ΠΎΠΊΠΎΠ½ΡΡΡΡΠΊΡΠΈΠΉ Π°Π΄Π΄ΠΈΡΠΈΠ²Π½ΡΠΌΠΈ ΠΌΠ΅ΡΠΎΠ΄Π°ΠΌΠΈ ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°ΡΡΡΡ Π² ΡΡΠ°ΡΡΠ΅
The Examples of Digitalization of Foundry Production: Virtual Engineering, Digital Twin, Additive Technologies
The construction of a digital twin of a real physical object is described. It can be a virtual counterpart of a part, product, equipment, technological process, production sites, workshops, or even factories. In fact, it is a set of mathematical models describing the state of an object and all its elements. The possibility of constructing a digital twin of an industrial facility is shown using the example of a casting shop based on gasified models.Π Π΅Π·ΡΠ»ΡΡΠ°ΡΠΈ. Π ΠΎΠ·Π³Π»ΡΠ½ΡΡΠΎ ΠΎΡΠ½ΠΎΠ²Π½Ρ ΡΠΏΠΎΡΠΎΠ±ΠΈ Π°Π΄ΠΈΡΠΈΠ²Π½ΠΎΠ³ΠΎ Π²ΠΈΡΠΎΠ±Π½ΠΈΡΡΠ²Π° ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ ΡΠ° ΠΏΡΡΠ°Π½ΠΈΡ
ΡΠΎΡΠΌ Π΄Π»Ρ Π²ΠΈΠ³ΠΎΡΠΎΠ²Π»Π΅Π½Π½Ρ ΠΌΠ΅ΡΠ°Π»Π΅Π²ΠΈΡ
Π²ΠΈΠ»ΠΈΠ²ΠΊΡΠ², Π·Π° ΡΠΊΠΈΠΌ ΠΏΠΎΡΠ°ΡΠΎΠ²ΠΎ Π½Π°ΡΠΎΡΡΡΡΡΡΡ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ 3D-Π΄ΡΡΠΊΡ Π²ΠΈΡΡΠ±, Π° ΠΏΡΠΎΡΠ΅Ρ ΡΠΏΡΠ°Π²Π»ΡΡΡΡΡΡ ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΎΡ ΠΊΠΎΠΌΠΏβΡΡΠ΅ΡΠ°. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ Π΄Π°Π½Ρ ΠΏΡΠΎ ΠΎΠ±βΡΠΌ ΡΠΎΡΡΡ ΡΠΈΠ½ΠΊΡ Π°Π΄ΠΈΡΠΈΠ²Π½ΠΈΡ
ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΡΠΉ Ρ ΠΏΡΠΈΠΊΠ»Π°Π΄ ΠΏΡΠΈΠ½ΡΠ΅ΡΠ° Π΄ΡΡΠΊΡΠ²Π°Π½Π½Ρ ΡΠΎΠ·ΠΏΠ»Π°Π²ΠΎΠΌ Π· Π΄ΡΠΎΡΡ.Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ. Π Π°ΡΡΠΌΠΎΡΡΠ΅Π½Ρ ΠΎΡΠ½ΠΎΠ²Π½ΡΠ΅ ΡΠΏΠΎΡΠΎΠ±Ρ Π°Π΄Π΄ΠΈΡΠΈΠ²Π½ΠΎΠ³ΠΎ ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄ΡΡΠ²Π° ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ ΠΈ ΠΏΠ΅ΡΡΠ°Π½ΡΡ
ΡΠΎΡΠΌ Π΄Π»Ρ ΠΈΠ·Π³ΠΎΡΠΎΠ²Π»Π΅Π½ΠΈΡ ΠΌΠ΅ΡΠ°Π»Π»ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΎΡΠ»ΠΈΠ²ΠΎΠΊ, ΠΏΠΎ ΠΊΠΎΡΠΎΡΠΎΠΌΡ ΠΏΠΎΡΠ»ΠΎΠΉΠ½ΠΎ Π½Π°ΡΠ°ΡΠΈΠ²Π°Π΅ΡΡΡ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ 3D-ΠΏΠ΅ΡΠ°ΡΠΈ ΠΈΠ·Π΄Π΅Π»ΠΈΠ΅, Π° ΠΏΡΠΎΡΠ΅ΡΡ ΡΠΏΡΠ°Π²Π»ΡΠ΅ΡΡΡ ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΌΠΎΠΉ ΠΊΠΎΠΌΠΏΡΡΡΠ΅ΡΠ°. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ Π΄Π°Π½Π½ΡΠ΅ ΠΎΠ± ΠΎΠ±ΡΠ΅ΠΌΠ΅ ΡΠΎΡΡΠ° ΡΡΠ½ΠΊΠ° Π°Π΄Π΄ΠΈΡΠΈΠ²Π½ΡΡ
ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΠΉ ΠΈ ΠΏΡΠΈΠΌΠ΅Ρ ΠΏΡΠΈΠ½ΡΠ΅ΡΠ° ΠΏΠ΅ΡΠ°ΡΠΈ ΡΠ°ΡΠΏΠ»Π°Π²ΠΎΠΌ ΠΈΠ· ΠΏΡΠΎΠ²ΠΎΠ»ΠΎΠΊΠΈ
Effective spring boundary conditions for a damaged interface between dissimilar media in three-dimensional case
Elastic waves in the presence of a damaged interface between two dissimilar elastic media is investigated in the three-dimensional case. The damaged is modeled as a stochastic distribution of equally sized circular cracks which is transformed into a spring boundary condition. First the scattering by a single circular interface crack between two dissimilar half-spaces is investigated and solved explicitly for normally incident waves in the low frequency limit. The transmission by a distribution of cracks is then determined and is transformed into a spring boundary condition, where effective spring stiffnesses are expressed in terms of elastic moduli and damage parameters. A comparison with previous results for a periodic distribution of cracks shows good agreement
Development of a Digital Twin of The Technological Process of Consumable Pattern Casting Using Production Data
The construction of a digital twin of a real physical object is described. It can be a virtual counterpart of a part, product, equipment, technological process, production sites, workshops or even factories. In fact, it is a set of mathematical models describing the state of an object and all its elements. The possibility of constructing a digital twin of an industrial facility is shown using the example of a consumable pattern casting workshop.Π ΠΎΠ·Π³Π»ΡΠ½ΡΡΠΎ Π΄ΠΎΡΠ»ΡΠ΄ΠΆΠ΅Π½Π½Ρ ΠΏΠΎ ΡΠΎΠ·ΡΠΎΠ±ΡΡ ΡΠΈΡΡΠ΅ΠΌ ΠΊΠΎΠΌΠΏβΡΡΠ΅ΡΠ½ΠΎΠ³ΠΎ ΠΌΠΎΠ½ΡΡΠΎΡΠΈΠ½Π³Ρ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΡΠ² ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΡΡΠ½ΠΈΡ
ΠΏΡΠΎΡΠ΅ΡΡΠ² Ρ ΡΡΠ°Π½ΡΠ² ΠΎΠ±βΡΠΊΡΡΠ² Π½Π° ΠΏΡΠΈΠΊΠ»Π°Π΄Ρ ΡΠ΅Ρ
Ρ Π»ΠΈΡΡΡ ΠΏΠΎ ΠΠΠ-ΠΏΡΠΎΡΠ΅ΡΡ, Π° ΡΠ°ΠΊΠΎΠΆ ΠΌΠ΅ΡΠΎΠ΄ΠΈ ΡΡ
ΡΠ°ΡΡΠΎΠ½Π°Π»ΡΠ½ΠΎΠ³ΠΎ Π²ΠΈΡΡΡΠ΅Π½Π½Ρ Π½Π° ΡΠ΅ΠΎΡΠ΅ΡΠΈΡΠ½ΡΠΉ ΠΎΡΠ½ΠΎΠ²Ρ ΡΡΡΠ°ΡΠ½ΠΎΡ ΠΏΡΠΈΠΊΠ»Π°Π΄Π½ΠΎΡ ΠΌΠ°ΡΠ΅ΠΌΠ°ΡΠΈΠΊΠΈ.Π Π°ΡΡΠΌΠΎΡΡΠ΅Π½Ρ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΠΏΠΎ ΡΠ°Π·ΡΠ°Π±ΠΎΡΠΊΠ΅ ΡΠΈΡΡΠ΅ΠΌ ΠΊΠΎΠΌΠΏΡΡΡΠ΅ΡΠ½ΠΎΠ³ΠΎ ΠΌΠΎΠ½ΠΈΡΠΎΡΠΈΠ½Π³Π° ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΡΠΎΡΠ΅ΡΡΠΎΠ² ΠΈ ΡΠΎΡΡΠΎΡΠ½ΠΈΠΉ ΠΎΠ±ΡΠ΅ΠΊΡΠΎΠ² Π½Π° ΠΏΡΠΈΠΌΠ΅ΡΠ΅ ΡΠ΅Ρ
Π° Π»ΠΈΡΡΡ ΠΏΠΎ ΠΠΠ-ΠΏΡΠΎΡΠ΅ΡΡΠ°, Π° ΡΠ°ΠΊΠΆΠ΅ ΠΌΠ΅ΡΠΎΠ΄Ρ ΠΈΡ
ΡΠ°ΡΠΈΠΎΠ½Π°Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠ΅ΡΠ΅Π½ΠΈΡ Π½Π° ΡΠ΅ΠΎΡΠ΅ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΎΡΠ½ΠΎΠ²Π΅ ΡΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΠΎΠΉ ΠΏΡΠΈΠΊΠ»Π°Π΄Π½ΠΎΠΉ ΠΌΠ°ΡΠ΅ΠΌΠ°ΡΠΈΠΊΠΈ
Cascade three-component composition on polystyrene basis absorbing in visible range and emitting in near IR
Design results have been presented for a three-component composition for solar energy conversion into the sensitivity range of Si and GaAs photocells based on polystyrene and polycyclic aromatic organic luminescent compounds. Two possible approaches to selection of concentrations of the components oriented to provide the maximum collection efficienc y of the visible range solar radiation and the optimum conditions of the Foerster non-radiative energy transfer between the intermediate and final components of the cascade compo -sition have been shown to give comparable results and thus do not form an alternative to one another.ΠΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½Ρ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ Π΄ΠΈΠ·Π°ΠΉΠ½Π° ΡΡΠ΅Ρ
ΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½ΡΠ½ΠΎΠΉ ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΠΈΠΈ Π΄Π»Ρ ΠΏΡΠ΅ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΡ ΡΠ½Π΅ΡΠ³ΠΈΠΈ ΡΠΎΠ»Π½Π΅ΡΠ½ΠΎΠ³ΠΎ ΠΈΠ·Π»ΡΡΠ΅Π½ΠΈΡ Π² ΠΈΠ½ΡΠ΅ΡΠ²Π°Π» ΡΡΠ²ΡΡΠ²ΠΈΡΠ΅Π»ΡΠ½ΠΎΡΡΠΈ Si ΠΈ GaAs ΡΠΎΡΠΎΡΠ»Π΅ΠΌΠ΅Π½ΡΠΎΠ² Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΏΠΎΠ»ΠΈΡΡΠΈΡΠΎΠ»Π° ΠΈ Π°ΡΠΎΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΠΎΠ»ΠΈΡΠΈΠΊΠ»ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΎΡΠ³Π°Π½ΠΎΠ»ΡΠΌΠΈΠ½ΠΎΡΠΎΡΠΎΠ². ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ Π΄Π²Π° Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΡΡ
ΠΏΠΎΠ΄Ρ
ΠΎΠ΄Π° ΠΊ ΠΏΠΎΠ΄Π±ΠΎΡΡ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΠΉ ΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½ΡΠΎΠ², ΠΎΡΠΈΠ΅Π½ΡΠΈΡΠΎΠ²Π°Π½Π½ΡΠ΅ Π½Π° ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠ΅Π½ΠΈΠ΅ ΠΌΠ°ΠΊΡΠΈΠΌΠ°Π»ΡΠ½ΠΎ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΠ³ΠΎ ΡΠ±ΠΎΡΠ° ΠΈΠ·Π»ΡΡΠ΅Π½ΠΈΡ Π² Π²ΠΈΠ΄ΠΈΠΌΠΎΠΌ Π΄ΠΈΠ°ΠΏΠ°Π·ΠΎΠ½Π΅ ΠΈ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΡΡ
ΡΡΠ»ΠΎΠ²ΠΈΠΉ Π€Π΅ΡΡΡΠ΅ΡΠΎΠ²ΡΠΊΠΎΠ³ΠΎ Π±Π΅Π·ΡΠ·Π»ΡΡΠ°ΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ ΠΏΠ΅ΡΠ΅Π½ΠΎΡΠ° ΡΠ½Π΅ΡΠ³ΠΈΠΈ ΠΌΠ΅ΠΆΠ΄Ρ ΠΏΡΠΎΠΌΠ΅ΠΆΡΡΠΎΡΠ½ΡΠΌΠΈ ΠΈ ΠΊΠΎΠ½Π΅ΡΠ½ΡΠΌΠΈ ΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½ΡΠ°ΠΌΠΈ ΠΊΠ°ΡΠΊΠ°Π΄Π½ΠΎΠΉ ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΠΈΠΈ, Π΄Π°ΡΡ ΡΡΠ°Π²Π½ΠΈΠΌΡΠ΅ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΈ, ΡΠ°ΠΊΠΈΠΌ ΠΎΠ±ΡΠ°Π·ΠΎΠΌ, Π½Π΅ ΡΠ²Π»ΡΡΡΡΡ Π°Π»ΡΡΠ΅ΡΠ½Π°ΡΠΈΠ²ΠΎΠΉ Π΄ΡΡΠ³ Π΄ΡΡΠ³Ρ.ΠΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½ΠΎ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠΈ Π΄ΠΈΠ·Π°ΠΉΠ½Ρ ΡΡΡΠΎΡ
ΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½ΡΠ½ΠΎΡ ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΡΡ Π΄Π»Ρ ΠΊΠΎΠ½Π²Π΅ΡΡΡΠ²Π°Π½Π½Ρ Π΅Π½Π΅ΡΠ³ΡΡ ΡΠΎΠ½ΡΡΠ½ΠΎΠ³ΠΎ Π²ΠΈΠΏΡΠΎΠΌΡΠ½ΡΠ²Π°Π½Π½Ρ Π² ΡΠ½ΡΠ΅ΡΠ²Π°Π» ΡΡΡΠ»ΠΈΠ²ΠΎΡΡΡ Si ΡΠ° GaAs ΡΠΎΡΠΎΠ΅Π»Π΅ΠΌΠ΅Π½ΡΡΠ² Π½Π° ΠΎΡΠ½ΠΎΠ²Ρ ΠΏΠΎΠ»ΡΡΡΠΈΡΠΎΠ»Ρ ΡΠ° Π°ΡΠΎΠΌΠ°ΡΠΈΡΠ½ΠΈΡ
ΠΏΠΎΠ»ΡΡΠΈΠΊΠ»ΡΡΠ½ΠΈΡ
ΠΎΡΠ³Π°Π½ΡΡΠ½ΠΈΡ
Π»ΡΠΌΡΠ½ΠΎΡΠΎΡΡΠ². ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΠΎ Π΄Π²Π° ΠΏΡΠ΄Ρ
ΠΎΠ΄ΠΈ Π΄ΠΎ Π΄ΠΎΠ±ΠΎΡΡ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΡΠΉ ΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½ΡΡΠ², ΠΎΡΡΡΠ½ΡΠΎΠ²Π°Π½Ρ Π½Π° Π·Π°Π±Π΅Π·ΠΏΠ΅ΡΠ΅Π½Π½Ρ ΠΌΠ°ΠΊΡΠΈΠΌΠ°Π»ΡΠ½ΠΎ Π΅ΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΠ³ΠΎ Π·Π±ΠΈΡΠ°Π½Π½Ρ Π²ΠΈΠΏΡΠΎΠΌΡΠ½ΡΠ²Π°Π½Π½Ρ Ρ Π²ΠΈΠ΄ΠΈΠΌΠΎΠΌΡ Π΄ΡΠ°ΠΏΠ°Π·ΠΎΠ½Ρ Ρ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΠΈΡ
ΡΠΌΠΎΠ² Π€Π΅ΡΡΡΠ΅ΡΡΠ²ΡΡΠΊΠΎΠ³ΠΎ Π±Π΅Π·Π²ΠΈΠΏΡΠΎΠΌΡΠ½ΡΠ²Π°Π»ΡΠ½ΠΎΠ³ΠΎ ΠΏΠ΅ΡΠ΅Π½ΠΎΡΡ Π΅Π½Π΅ΡΠ³ΡΡ ΠΌΡΠΆ ΠΏΡΠΎΠΌΡΠΆΠ½ΠΈΠΌΠΈ ΡΠ° ΠΊΡΠ½ΡΠ΅Π²ΠΈΠΌΠΈ ΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½ΡΠ°ΠΌΠΈ ΠΊΠ°ΡΠΊΠ°Π΄Π½ΠΎΡ ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΡΡ, Π΄Π°ΡΡΡ ΠΏΠΎΡΡΠ²Π½ΡΠ½Ρ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠΈ Ρ, ΠΎΡΠΆΠ΅, Π½Π΅ Ρ Π°Π»ΡΡΠ΅ΡΠ½Π°ΡΠΈΠ²ΠΎΡ ΠΎΠ΄ΠΈΠ½ ΠΎΠ΄Π½ΠΎΠΌΡ
ΠΡΠ΅Π½ΠΊΠ° Π³Π»ΠΎΠ±Π°Π»ΡΠ½ΠΎΠΉ ΠΏΡΠΎΠ΄ΠΎΠ»ΡΠ½ΠΎΠΉ Π΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΈ Π»Π΅Π²ΠΎΠ³ΠΎ ΠΆΠ΅Π»ΡΠ΄ΠΎΡΠΊΠ° ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ΡΠΏΠ΅ΠΊΠ»-ΡΡΠ΅ΠΊΠΈΠ½Π³ ΡΡ ΠΎΠΊΠ°ΡΠ΄ΠΈΠΎΠ³ΡΠ°ΡΠΈΠΈ Ρ Π±Π΅ΡΠ΅ΠΌΠ΅Π½Π½ΡΡ Ρ COVID-19
Background. The new coronavirus disease (COVID-19), which has arisen as a result of infection SARS-CoV-2, which causes severe respiratory syndrome, is characterized by high morbidity, mortality and is a big problem in the health sector. The aim to use 2-dimensional speckle-tracking echocardiography (STE) in combination with transthoracic echocardiography (TTE) in the assessment of left ventricular longitudinal strain (LVGLS) in pregnant women with confirmed coronavirus infection, hospitalized in the O.M. Filatov Municipal Clinical Hospital No. 15, Moscow, Russian Federation. Methods. The results of STE were analyzed in 102 pregnant women with confirmed coronavirus infection at the hospital stage of treatment. Results. There was no decrease in LVGLS values in pregnant women with COVID-19 without a history of cardiovascular pathology. There was also no additional decrease in the LVGLS value in pregnant women with COVID-19 and initially reduced LVGLS in the presence of a cardiovascular history (the results were consistent with those in pregnant women with concomitant cardiovascular pathology, but without a new coronavirus infection). Conclusions. In pregnant women with COVID-19 without a history of concomitant pathology, STE did not provide additional information regarding possible subclinical left ventricular dysfunction.ΠΠ±ΠΎΡΠ½ΠΎΠ²Π°Π½ΠΈΠ΅. ΠΠΎΠ²Π°Ρ ΠΊΠΎΡΠΎΠ½Π°Π²ΠΈΡΡΡΠ½Π°Ρ ΠΈΠ½ΡΠ΅ΠΊΡΠΈΡ (COVID-19), Π²ΡΠ·ΡΠ²Π°ΡΡΠ°Ρ ΡΡΠΆΠ΅Π»ΡΠΉ ΡΠ΅ΡΠΏΠΈΡΠ°ΡΠΎΡΠ½ΡΠΉ ΡΠΈΠ½Π΄ΡΠΎΠΌ, Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΠ·ΡΠ΅ΡΡΡ Π²ΡΡΠΎΠΊΠΎΠΉ Π·Π°Π±ΠΎΠ»Π΅Π²Π°Π΅ΠΌΠΎΡΡΡΡ, ΡΠΌΠ΅ΡΡΠ½ΠΎΡΡΡΡ ΠΈ ΡΠ²Π»ΡΠ΅ΡΡΡ Π±ΠΎΠ»ΡΡΠΎΠΉ ΠΏΡΠΎΠ±Π»Π΅ΠΌΠΎΠΉ Π² ΡΡΠ΅ΡΠ΅ Π·Π΄ΡΠ°Π²ΠΎΠΎΡ
ΡΠ°Π½Π΅Π½ΠΈΡ. Π¦Π΅Π»Ρ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΡ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ 2-ΠΌΠ΅ΡΠ½ΠΎΠΉ ΡΠΏΠ΅ΠΊΠ»-ΡΡΠ΅ΠΊΠΈΠ½Π³ ΡΡ
ΠΎΠΊΠ°ΡΠ΄ΠΈΠΎΠ³ΡΠ°ΡΠΈΠΈ (Speckle tracking echocardiography, STE) Π² ΠΊΠΎΠΌΠ±ΠΈΠ½Π°ΡΠΈΠΈ c ΡΡΠ°Π½ΡΡΠΎΡΠ°ΠΊΠ°Π»ΡΠ½ΠΎΠΉ ΡΡ
ΠΎΠΊΠ°ΡΠ΄ΠΈΠΎΠ³ΡΠ°ΡΠΈΠ΅ΠΉ (transthoracic echocardiogram, Π’Π’Π) Π² ΠΎΡΠ΅Π½ΠΊΠ΅ ΠΏΡΠΎΠ΄ΠΎΠ»ΡΠ½ΠΎΠΉ Π΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΈ Π»Π΅Π²ΠΎΠ³ΠΎ ΠΆΠ΅Π»ΡΠ΄ΠΎΡΠΊΠ° (Left ventricular global longitudinal strain, LVGLS) Ρ Π±Π΅ΡΠ΅ΠΌΠ΅Π½Π½ΡΡ
Ρ ΠΏΠΎΠ΄ΡΠ²Π΅ΡΠΆΠ΄Π΅Π½Π½ΠΎΠΉ ΠΊΠΎΡΠΎΠ½Π°Π²ΠΈΡΡΡΠ½ΠΎΠΉ ΠΈΠ½ΡΠ΅ΠΊΡΠΈΠ΅ΠΉ, Π³ΠΎΡΠΏΠΈΡΠ°Π»ΠΈΠ·ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
Π² ΠΠΎΡΠΎΠ΄ΡΠΊΡΡ ΠΊΠ»ΠΈΠ½ΠΈΡΠ΅ΡΠΊΡΡ Π±ΠΎΠ»ΡΠ½ΠΈΡΡ β 15 ΠΈΠΌ. Π.Π. Π€ΠΈΠ»Π°ΡΠΎΠ²Π° ΠΠ΅ΠΏΠ°ΡΡΠ°ΠΌΠ΅Π½ΡΠ° Π·Π΄ΡΠ°Π²ΠΎΠΎΡ
ΡΠ°Π½Π΅Π½ΠΈΡ Π³. ΠΠΎΡΠΊΠ²Ρ. ΠΠ΅ΡΠΎΠ΄Ρ. ΠΡΠ»ΠΈ ΠΏΡΠΎΠ°Π½Π°Π»ΠΈΠ·ΠΈΡΠΎΠ²Π°Π½Ρ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ STE Ρ 102 Π±Π΅ΡΠ΅ΠΌΠ΅Π½Π½ΡΡ
Ρ ΠΏΠΎΠ΄ΡΠ²Π΅ΡΠΆΠ΄Π΅Π½Π½ΠΎΠΉ ΠΊΠΎΡΠΎΠ½Π°Π²ΠΈΡΡΡΠ½ΠΎΠΉ ΠΈΠ½ΡΠ΅ΠΊΡΠΈΠ΅ΠΉ Π½Π° Π³ΠΎΡΠΏΠΈΡΠ°Π»ΡΠ½ΠΎΠΌ ΡΡΠ°ΠΏΠ΅ Π»Π΅ΡΠ΅Π½ΠΈΡ. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ. ΠΠ΅ Π±ΡΠ»ΠΎ Π²ΡΡΠ²Π»Π΅Π½ΠΎ ΡΠ½ΠΈΠΆΠ΅Π½ΠΈΡ ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»Π΅ΠΉ LVGLS Ρ Π±Π΅ΡΠ΅ΠΌΠ΅Π½Π½ΡΡ
Ρ COVID-19 Π±Π΅Π· ΡΠ΅ΡΠ΄Π΅ΡΠ½ΠΎ-ΡΠΎΡΡΠ΄ΠΈΡΡΠΎΠΉ ΠΏΠ°ΡΠΎΠ»ΠΎΠ³ΠΈΠΈ Π² Π°Π½Π°ΠΌΠ½Π΅Π·Π΅. Π’Π°ΠΊΠΆΠ΅ Π½Π΅ Π±ΡΠ»ΠΎ Π²ΡΡΠ²Π»Π΅Π½ΠΎ Π΄ΠΎΠΏΠΎΠ»Π½ΠΈΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠ½ΠΈΠΆΠ΅Π½ΠΈΡ Π²Π΅Π»ΠΈΡΠΈΠ½Ρ LVGLS Ρ Π±Π΅ΡΠ΅ΠΌΠ΅Π½Π½ΡΡ
Ρ COVID-19 ΠΈ ΠΈΡΡ
ΠΎΠ΄Π½ΠΎ ΡΠ½ΠΈΠΆΠ΅Π½Π½ΠΎΠΉ LVGLS ΠΏΡΠΈ Π½Π°Π»ΠΈΡΠΈΠΈ ΡΠΊΡΡΡΠ°Π³Π΅Π½ΠΈΡΠ°Π»ΡΠ½ΠΎΠΉ ΠΏΠ°ΡΠΎΠ»ΠΎΠ³ΠΈΠΈ (ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²ΠΎΠ²Π°Π»ΠΈ ΡΠ°ΠΊΠΎΠ²ΡΠΌ Ρ Π±Π΅ΡΠ΅ΠΌΠ΅Π½Π½ΡΡ
Ρ ΡΠΎΠΏΡΡΡΡΠ²ΡΡΡΠ΅ΠΉ ΡΠ΅ΡΠ΄Π΅ΡΠ½ΠΎ-ΡΠΎΡΡΠ΄ΠΈΡΡΠΎΠΉ ΠΏΠ°ΡΠΎΠ»ΠΎΠ³ΠΈΠ΅ΠΉ, Π½ΠΎ Π±Π΅Π· Π½ΠΎΠ²ΠΎΠΉ ΠΊΠΎΡΠΎΠ½Π°Π²ΠΈΡΡΡΠ½ΠΎΠΉ ΠΈΠ½ΡΠ΅ΠΊΡΠΈΠΈ). ΠΠ°ΠΊΠ»ΡΡΠ΅Π½ΠΈΠ΅. Π£ Π±Π΅ΡΠ΅ΠΌΠ΅Π½Π½ΡΡ
Ρ COVID-19 Π±Π΅Π· ΡΠΎΠΏΡΡΡΡΠ²ΡΡΡΠ΅ΠΉ ΠΏΠ°ΡΠΎΠ»ΠΎΠ³ΠΈΠΈ Π² Π°Π½Π°ΠΌΠ½Π΅Π·Π΅ Π²ΡΠΏΠΎΠ»Π½Π΅Π½ΠΈΠ΅ STE Π½Π΅ Π΄Π°Π²Π°Π»ΠΎ Π΄ΠΎΠΏΠΎΠ»Π½ΠΈΡΠ΅Π»ΡΠ½ΠΎΠΉ ΠΈΠ½ΡΠΎΡΠΌΠ°ΡΠΈΠΈ Π² ΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΠΈ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΠΉ ΡΡΠ±ΠΊΠ»ΠΈΠ½ΠΈΡΠ΅ΡΠΊΠΎΠΉ Π΄ΠΈΡΡΡΠ½ΠΊΡΠΈΠΈ Π»Π΅Π²ΠΎΠ³ΠΎ ΠΆΠ΅Π»ΡΠ΄ΠΎΡΠΊΠ°
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