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Документы 21 - 30 из 60
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21.
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Авторы:
Jin-Bin Cao , Chunxiao Yan, Dunlop Malcolm, Reme Henri , Dandouras Iannis , Tielong Zhang, Dongmei Yang, Moiseyev Aleksey Vladimirovich, Solovyev Stepan Ivanovich, Wang Z. Q., Leonoviche Anatoly Sergeevich, Zolotukhina N. A., Mishin Vilen M.
Заглавие: Geomagnetic signatures of current wedge produced by fast flows in a plasma sheet

Количество страниц: 6 с.

This paper uses the plasma data from Cluster and TC-1 and geomagnetic data to study the geomagnetic signatures of current wedge produced by fast-flow braking in the plasma sheet. The three fast flows studied here occurred in a very quiet background and were accompanied by no (or weak) particle injections, thus avoiding the influences from other disturbances. All the geomagnetic signatures of a substorm current wedge can be found in geomagnetic signatures of a current system produced by the braking of fast flows, indicating that the fast flows can produce a complete current wedge which contains postmidnight downward and premidnight upward field-aligned currents, as well as a westward electrojet. The Pi2 precursors exist not only at high latitudes but also at midlatitudes. The starting times of midlatitude Pi2 precursors can be identified more precisely than those of high-latitude Pi2 precursors, providing a possible method to determine the starting time of fast flows in their source regions. The AL drop that a bursty bulk flow produces is proportional to its velocity and duration. In three cases, the AL drops are 200 nT, whether a substorm can be triggered depends mainly on the conditions of the braking regions before fast flows. The observations of solar wind before the three fast flows suggest that it is difficult for the fast flows to trigger a substorm when the interplanetary magnetic field Bz of solar wind is weakly southward.

Geomagnetic signatures of current wedge produced by fast flows in a plasma sheet / Jin-Bin Cao, Chunxiao Yan, Malcolm Dunlop, Henri Reme, Iannis Dandouras, Tielong Zhang, Dongmei Yang, Alexey Moiseyev, Stepan I. Solovyev, Z. Q. Wang, A. Leonoviche, N. Zolotukhina, and V. Mishin // Journal of Geophysical Research: Space Physics. – 1978. – 2010 (August), vol. 115, N 8. – P. A08205.

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22.
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Авторы:
Khalipov Victor Lavrentievich, Galperin Yury Ilyich, Stepanov Alexander Egorovich, Bondar Elena Dmitrievna
Заглавие: Formation of polarization jet during injection of ions into the inner magnetosphere

Количество страниц: 4 с.

Long-lasting ground based measurements of a polarization jet (PJ) by the latitudinal chain of ionospheric stations in Yakutia (3 < L < 5; MLT = UT + 9 h) and by 5 subauroral Russian stations were analyzed. A number of cases were found when PJ was recorded simultaneously with energetic ion observations by AMPTE/CCE and INTERBALL 2. The data comparison shows that at least in the considered cases of strong magnetic substorms, PJ was accompanied by strong injection of ions with the energy of ~20-50 keV and intensity of ~10 cm-² c-¹ sr-¹keV-¹. Close to the injection region in the near midnight sector no ion dispersion was observed, but in the evening sector nose events were detected. In accordance with the mechanism suggested by Southwood and Wolf (JGR, 1978, 83, 5227) PJ was observed near the equatorial boundary of energetic ion penetration into the magnetosphere. Measurements by ionosonds at different longitudes show that the westward velocity of the frontt of PJ development is close to the gradient drift velocity of 20 keV ions (forming nose events). Thus, the physical mechanism of PJ formation due to energetic ion injection during a strong substorm burst is experimentally confirmed. Satellite measurements show that in the near midnight sector energetic ions reach the shell L=3.0 in 20-30 minutes after a substorm commencement with AE>500 nT.

Formation of polarization jet during injection of ions into the inner magnetosphere / V. L. Khalipov, Yu. I. Galperin, A. E. Stepanov, E. D. Bondar // Physics of auroral phenomena : proceedings of the 25th annual seminar, Apatity, 26 February – 1 March 2002. – 2002. – P. 43-46.
DOI: 10.1016/S0273-1177(03)00016-4

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23.
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Авторы:
Kyuregyan K. K. , Kichatova V.S., Isaeva O. V., Potemkin I. A., Malinnikova E. Y., Karlsen A. A., Mikhailov M. I. , Lopatukhina M. A., Mobarhan A. A., Mullin E. V., Slukinova O.S., Ignateva M. E., Sleptsova Snezhana S., Oglezneva E. E., Shibri kE. V., Isaguliants M. G.
Заглавие: Coverage with Timely Administered Vaccination against Hepatitis B Virus and Its Influence on the Prevalence of HBV Infection in the Regions of Different Endemicity

Количество страниц: 15 с.

Coverage with Timely Administered Vaccination against Hepatitis B Virus and Its Influence on the Prevalence of HBV Infection in the Regions of Different Endemicity / K. K. Kyuregyan, V. S. Kichatova, O. V.Isaeva [and etc.] // Vaccines. - 2021. - Т. 9, N 2. - С. 1-15. - DOI: 10.3390/vaccines9020082
DOI: 10.3390/vaccines9020082

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24.
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Авторы:
Larionov Vladimir Petrovich, Bolotina Natalya Pavlovna, Аrgunova T. V., Tyunin Vladimir Denisovich, Lebedev Michail Petrovich
Заглавие: Laser processing of plasma sprayed coatings

Издательство: [s. n.]

Год выпуска: 1988

Количество страниц: 14 с.

The influence of continious CO2-laser processing on structure, composition and microhadness of plasma sprayed Ni-Cr-Si-B, Fe-C-Cr-V, Ni-Al coatings was studied. The change of chemical and phase compositions of the coatings compared with the initial sprayed ones due to alloying with elements of substrate, depending on the processing operation (input power) was determined. Laser processing of plasma sprayed coatings allows to improve substantially their adhesion and in combination with high speed cooling, gives the possibility to regulate the processes of structure formation, dispersion, phase formation, and hence, the properties of forming coatings by means of processing operation.

Laser processing of plasma sprayed coatings / Dr. V. P. Larionov, Cand. N. P. Bolotina, Eng. T. V. Argunova, Cand. V. D. Tyunin, Eng. M. P. Lebedev. — [S. l. : s. n.], 1988. — 6 c.

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25.
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Авторы:
Makarov George Afanasyevich, Baishev Dmitriy Gavrilievich, Moiseyev Aleksey Vladimirovich, Solovyev Stepan Ivanovich, Pilipenko V. A., Engebretson Mark, Yumoto Kiyohumi
Заглавие: High-latitude peculiarities of the geomagnetic SI impulse propagation meridional velocity during sharp decrease of solar wind density

Количество страниц: 4 с.

The geomagnetic manifestation of sudden impulse (SI) caused by a sharp decrease of the solar wind dynamic pressure due to the plasma density reduction is considered. The observational data of the magnetometer world network have been analysed. The propagation velocities of the SI signal in the meridional direction by using data of the horizontal component of geomagnetic field in the high-latitude region have been calculated. It is found that at a sharp decrease of the solar wind density the meridional propagation of the SI signal is in the northern direction. In this case, on the day side the propagation velocity is constant but there is a tendency of its increasing in the MLT morning sector. It has been established that the meridional propagation velocity of the SI signal at a sharp decrease of the solar wind density depends on the geomagnetic latitude, i.e. with the rise of latitude the velocity in the auroral zone decreases and in the polar cap it increases.

High-latitude peculiarities of the geomagnetic SI impulse propagation meridional velocity during sharp decrease of solar wind density / G. A. Makarov, D. G. Baishev, A. V. Moiseyev, S. I. Solovyev, V. A. Pilipenko, M. J. Engebretson, K. Yumoto // Proceedings of the Fifth International Conference on Substorms : 16-20 May 2000 Congress Centre of the Arctic and Antarctic Research Institute, St. Petersburg, Russia. − Noordwijk, Netherlands : European Space Agency, 2000. − P. 523-526.

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26.
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Авторы:
Malov Sergey I., Baatarkhuu Oidov, Sleptsova Snezhana S., Savilov E. D., Rasulov Rodion I., Malov Igor V.
Заглавие: Risk factors for hepatocellular carcinoma in men of northeast regions of Asia with high, medium, and low incidence rates

Количество страниц: 1 с.

Risk factors for hepatocellular carcinoma in men of northeast regions of Asia with high, medium, and low incidence rates / Malov Sergey, Baatarkhuu Oidov, Sleptsova Snezhana [and etc.] // Hepatology International. - 2020. - Т. 14, N S1. - С. 252.
DOI: 10.1007/s12072-020-10030-4

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27.
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Авторы:
Mishin Vilen M., Foerster M., Saifudinova Tamara Ivanovna, Bazarzhapov Alexander Dashitsyrenovich, Sapronova Lyudmila Alexandrovna, Golovkov Vadim Petrovich, Stauning P., Watermann J., Solovyev Stepan Ivanovich
Заглавие: Dynamics of the Field-Aligned Current Systems Observed during The Super-Storm on Nov. 20, 2003

Количество страниц: 4 с.

Spatial distribution in the polar ionosphere of field-aligned currents density is studied by using data of the events on 20.11.03. Observable distributions are described in terms of three Regions of Iijima and Potemra, with taken into account in each Region of three types of spatial inhomogeneities. These inhomogeneitie were overlooked earlier. Dynamics of classical substorm current wedge SCW1, and the "current wedges" SCW2 and SCW3, both creating a polarization and amplification of the westward auroral electrojet, are described.

Dynamics of the Field-Aligned Current Systems Observed during The Super-Storm on Nov. 20, 2003 / V. M. Mishin, M. Foerster, T. I. Saifudinova, A. D. Bazarzhapov, L. A. Sapronova, V. P. Golovkov, P. Stauning, J. Watermann, and S. I. Solovyev // Solar Extreme Events Fundamental Science and Applied Aspects Nor-Amberd, Armenia 26-30 September 2005 : proceedings of the Second International Symposium / edited by A. Chilingarian and G. Karapetyan. − Erevan : Cosmic Ray Division, Alikhanyan Physics Institute, 2006. − P. 79-82.

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28.
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Авторы:
Mishin Vilen M., Foerster M., Saifudinova Tamara Ivanovna, Bazarzhapov Alexander Dashitsyrenovich, Sapronova Lyudmila Alexandrovna, Golovkov Vadim Petrovich, Stauning P., Watermann J., Solovyev Stepan Ivanovich
Заглавие: Basic Regimes of the Super-Storm on Nov 20, 2003 and the Problems Substorms-Storm

Количество страниц: 4 с.

The 20.11.03 super-storm is described on the basis of the quantitative estimations of input and output parameters of the magnetospheric disturbance energetics. Two input parameters are ε'- Poynting flux from solar wind into the magnetosphere, and the polar cap potential drop Upc. The output parameters (indicators the magnetospheric responses) are the total power of the magnetospheric disturbance (Qt), and the powers consumed in the ionosphere (Qi) and in the ring current (Qdr). Different modes of the magnetosphere disturbances are shortly described: substorms, driven mode, Null Events by Lyons et. al., saturation of the ionosphere, and responses to a strong s. w. pressure pulses. The problem of the substorms-storm relationship is also addressed.

Basic Regimes of the Super-Storm on Nov 20, 2003 and the Problems Substorms-Storm / V. M. Mishin, M. Foerster, T. I. Saifudinova, A. D. Bazarzhapov, L. A. Sapronova, V. P. Golovkov, P. Stauning, J. Watermann, and S. I. Solovyev // Solar Extreme Events Fundamental Science and Applied Aspects Nor-Amberd, Armenia 26-30 September 2005 : proceedings of the Second International Symposium / edited by A. Chilingarian and G. Karapetyan. − Erevan : Cosmic Ray Division, Alikhanyan Physics Institute, 2006. − P. 86-89.

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29.
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Автор:
Mochanov Yuri Alekseevich
Заглавие: Early migrations to America in the light of a study of the Dyuktai paleolithic culture in Northeast Asia

Количество страниц: 13 с.

The most ancient monuments of Duktai culture were found in North America - in Alaska and the adjacent territories of Canada. At present, scientists have almost no doubt the assumption that it was from Northeast Asia (from Yakutia through Chukotka and Alaska) that the initial settlement of the New World by man took place. It is considered an axiom that America was originally deserted and that the continent was inhabited by a man of a modern physical type (Homo sapiens) from Asia through the areas adjacent to the Bering Strait, along the Bering Land Bridge connecting Chukotka with Alaska.
Древнейшие памятники дюктайской культуры найдены и в Северной Америке — на Аляске и прилегающих к ней территориях Канады.В настоящее время у ученых почти не вызывает сомнения предположение, что именно из Северо-Восточной Азии (из Якутии через Чукотку и Аляску) происходило и первоначальное заселение человеком Нового Света. Считается аксиомой, что Америка изначально была безлюдной и что континент был заселен человеком современного физического типа (Homo sapiens) из Азии через области, примыкающие к Берингову проливу, по Берингийскому сухопутному мосту, соединяющему Чукотку с Аляской.

Mochanov, Ju. A. Early migrations to America in the light of a study of the Dyuktai paleolithic culture in Northeast Asia / Ju. A. Mochanov // Early Native Americans : prehistoric demography, economy, and technology. — The Hague ; Paris ; New York : Mouton publishers, 1980. — P. 119-131.

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30.
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Авторы:
Moiseyev Aleksey Vladimirovich, Baishev Dmitriy Gavrilievich, Mishin Vilen M., Uozumi T., Yoshikawa A., Du A.
Заглавие: Features of formation of small-scale wave disturbances during a sudden magnetosphereic compression
Особенности формирования мелкомасштабных волновых возмущений во время резкого сжатия магнитосферы

Количество страниц: 9 с.

По данным наземных и спутниковых наблюдений рассматриваются квазипериодические изменения геомагнитного поля и параметров плазмы в диапазоне Pc 5 пульсаций, последовавшие сразу после взаимодействия межпланетной ударной волны (МУВ) с земной магнитосферой в событии 24.04.2009 в 00:53 UT. Пульсации были локализованы на широтах 66-74° в полуденном (11 MLT) и вечернем (20 MLT) секторах. Анализ годографов изменений геомагнитного поля как по спутниковым, так и наземным наблюдениям показал наличие вихревых возмущений. В данном событии фронт МУВ в межпланетной среде и фронт волны сжатия в магнитосфере имели наклон в плоскости ZGSM=0, угол наклона составлял 14° в межпланетной среде и 34° в магнитосфере. Положение вихревых возмущений в магнитосфере на разном радиальном расстоянии: X~5.5 Re в полуденном и X~-6.3÷-7.3 Re в вечернем секторе, согласуется с наклоном фронта. По спутниковым наблюдениям максимальная интенсивность волновых возмущений в обоих секторах регистрировалась в тороидальной компоненте, что соответствовало резонансному механизму возбуждения этих возмущений. Анализ распределения скоростей течения плазмы и распространения фронта волны сжатия в магнитосфере показал, что вихревые возмущения наблюдались в областях, где скорости течения плазмы и распространения фронта значительно различались по величине.
Quasi-periodic changes of the geomagnetic field and plasma parameters in the range of Pc 5 pulsations, which occurred immediately after the interaction of interplanetary shock (IPS) with Earth’s magnetosphere in the event of April 24, 2009 at 00:53 UT are examined using ground and satellite observations. The pulsations were localized at latitudes 66-74° in the noon (11 MLT) and evening (20 MLT) sectors. The analysis of hodographs of the geomagnetic field changes both from satellite and ground observations has shown the presence of vortical disturbances. In this event, both the IPS front in the interplanetary medium and the compression wave front in the magnetosphere had a slope in the ZGSM=0 plane; the inclination angle was 14° in the interplanetary medium and 34° in the magnetosphere. The location of the vortical disturbances in the magnetosphere at different radial distances, i.e. X ~5.5 Re in the noon sector and X ~-6.3 ÷-7.3 Re in the evening sector, is in agreement with the front inclination. As inferred from satellite observations, the maximum intensity of wave disturbances in both the sectors was registered in the toroidal component of the magnetic field. This suggests the resonant mechanism of excitation of these disturbances. The analysis of distribution of velocities of plasma flow and compression wave front propagation in the magnetosphere’s equatorial plane has revealed that the vortical disturbances occurred in regions where these velocities were noticeably different in magnitude.

Features of formation of small-scale wave disturbances during a sudden magnetosphereic compression = Особенности формирования мелкомасштабных волновых возмущений во время резкого сжатия магнитосферы / A. Moiseev, D. Baihsev, V. Mishin, T. Uozumi, A. Yoshikawa, A. Du // Солнечно-земная физика = Solar-Terrestrial Physics. – 2017, т. 3, N 2 : 13-я российско-китайская конференция по космической погоде. – С. 36-44.
DOI: 10.12737/22606

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