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Документы 41 - 50 из 113
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41.
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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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42.
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Авторы:
Khalipov Victor L., Galperin Yury Ilyich, Stepanov Alexander E., Bondar Elena D.
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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43.
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Автор:
Khusaynova Gulnira Razifovna
Заглавие: Specifics of the dastan genre structure in variants of “Tahir and Zukhra” and “Leyla and Majnun”: Creative techniques and their forms in Tatar romanic dastans
Специфика структуры жанра дастан в вариантах "Тахир и Зухра", "Лейля и Меджнун" (Творческие приемы, их формы в татарских романических дастанах)

Количество страниц: 14 с.

The relevance of this study is due to insufficient study of the peculiarities of the structure of Tatar romantic dastans. The object of the research is romanic dastans featuring Tahir and Zukhra, and Leyla and Majnun, recorded or rewritten by informants in Tatar communities. The study also analyses other Turkic-language variants as well as medieval literary poems were attracted as background phenomenon. The purpose of the article is to consider the structural features of Tatar romanic dastans. In order to achieve this goal, the following tasks were set: the paths and stylistic tools in the Tatar dastans "Tahir and Zuhra" and "Leyla and Majnun" were identified, different variants were compared in terms of their contents and forms. In this article comparative and structural-descriptive research methods were used. The Tatar romanic dastans often use metaphors, epithets, epiphors, hyperbolas, and rhetorical questions. Despite the frequent use of expressive means, folklore variants are inferior to literary versions of these dastans. This is due to the fact that the monuments were simplified, passing from generation to generation.

Khusaynova, G. R. Specifics of the dastan genre structure in variants of “Tahir and Zukhra” and “Leyla and Majnun”: Creative techniques and their forms in Tatar romanic dastans / G. R. Khusaynova ; Северо-Восточный федеральный университет им. М. К. Аммосова // Вестник Северо-Восточного федерального университета им. М. К. Аммосова. Серия "Вопросы национальных литератур". - 2023. - N 1 (9). - С. 42-55.
DOI: 10.25587/litteraesvfu.2023.11.77.006

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44.
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Авторы:
Kyuregyan Karen K., Kichatova Vera S., Isaeva Olga V., Potemkin Ilya A., Malinnikova Elena Y., Karlsen Anastasia A., Mikhailov Mikhail I., Lopatukhina Maria A., Mobarhan Arman A., Mullin Evgeny V., Slukinova Olga Sergeevna, Ignateva Margarita E., Sleptsova Snezhana, Oglezneva Elena E., Shibrik E. V., Isaguliants Maria 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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45.
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Авторы:
Lazarev Nyurgun, Itou Hiromichi
Заглавие: Equilibrium problems for Kirchhoff–Love plates with nonpenetration conditions for known configurations of crack edges

Количество страниц: 14 с.

Lazarev, N. P. Equilibrium problems for Kirchhoff–Love plates with nonpenetration conditions for known configurations of crack edges / N. P. Lazarev, H. Itou // Математические заметки СВФУ. — 2020. — Т. 27, N 3 (107), июль-сентябрь. — С. 52-65
DOI: 10.25587/SVFU.2020.75.68.005

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46.
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Автор:
Li Natalya G.
Заглавие: Water balance of freeze-tolerant insect larvae inhabiting arid areas in Eastern Siberia (Yakutia, Russia)
Водный баланс морозотолерантных насекомых, обитающих в условиях сухого климата Восточной Якутии (Якутия, Россия)

Количество страниц: 5 с.

Климат в Якутии характеризуется низкими зимними и высокими летними температурами, что является причиной высокой степени сухости воздуха, достигающей 30 % в отдельные периоды. Поэтому насекомые, обитающие в таких условиях, выработали в процессе эволюции определенные механизмы адаптации. В данном исследовании оценка водного баланса для нескольких морозотолерантных видов (Aporia crataegi L., Upis ceramboides L., Pieris rapae L., Delia floralis Fallen, личинки, принадлежащие Diptera) была основана на измерении скорости потери воды, скорости метаболизма и содержания воды в организме. В соответствии с полученными данными, Upis ceramboides, Pieris rapae, Delia floralis, личинки, принадлежащие к Dipera, характеризуются высокой проницаемостью клеточной стенки тела. Это связано с тем, что биологический цикл развития этих видов сопровождается низкой степенью экспозиции по отношению к сухому воздуху. Для них замерзание клеточной жидкости, инициированное лёд-нуклеирующими белками, вероятно, является существенной частью водосохраняющего механизма в зимний период. В противоположность этим видам, гусеницы Aporia crataegi L. обитают в условиях высокой степени экспозиции к сухому воздуху и поэтому имеют низкую кутикулярную водопроницаемость, сравнимую с таковой для африканских жуков. Этот механизм позволяет данному виду сохранять до 70 % воды в организме, несмотря на экстремально низкую влажность воздуха в окружающей их среде. В соответствии с данным исследованием, другой механизм поддержания водного баланса в зимний период, связанный с продукцией лёд-нуклеирующих белков, не является существенным для данного вида. Наконец, кокон, в котором гусеницы находятся с осени, всю зиму и весной, также защищают их от дегидратации в "сухие" сезоны года.

Li, N. G. Water balance of freeze-tolerant insect larvae inhabiting arid areas in Eastern Siberia (Yakutia, Russia) / N. G. Li // Евразиатский энтомологический журнал. – 2015, Т. 14, N 1. – С. 37-41.

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47.
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Авторы:
Lopatin Alexey V., Sotnikova M. V., Klimovsky Aisen, Lavrov A. V., Protopopov Albert V. , Gimranov D. O., Parkhomchuk E. V.
Заглавие: Mummy of a juvenile sabre-toothed cat Homotherium latidens from the Upper Pleistocene of Siberia = Мумия молодой саблезубой кошки Homotherium latidens из верхнего плейстоцена в Сибири

Количество страниц: 10 с.

The frozen mummy of the large felid cub was found in the Upper Pleistocene permafrost on the Badyarikha River (Indigirka River basin) in the northeast of Yakutia, Russia. The study of the specimen appearance showed its significant differences from a modern lion cub of similar age (three weeks) in the unusual shape of the muzzle with a large mouth opening and small ears, the very massive neck region, the elongated forelimbs, and the dark coat color. Tomographic analysis of the mummy skull revealed the features characteristic of Machairodontinae and of the genus Homotherium. For the first time in the history of paleontology, the appearance of an extinct mammal that has no analogues in the modern fauna has been studied.
Замороженная мумия детеныша крупной кошки была найдена в вечной мерзлоте верхнего плейстоцена на реке Бадьяриха (бассейн реки Индигирка) на северо-востоке Якутии, Россия. Изучение внешнего вида образца показало, что он значительно отличается от современного львенка того же возраста (три недели) необычной формой морды с большим ртом и маленькими ушами, очень массивной шеей, вытянутыми передними лапами и темным окрасом шерсти. Томографический анализ черепа мумии выявил особенности, характерные для Machairodontinae и рода Homotherium. Впервые в истории палеонтологии было изучено строение вымершего млекопитающего, не имеющего аналогов в современной фауне.

Mummy of a juvenile sabre-toothed cat Homotherium latidens from the Upper Pleistocene of Siberia / A. V. Lopatin, M. V. Sotnikova, A. I. Klimovsky, A. V. Lavrov, A. V. Protopopov, D. O. Gimranov, E. V. Parkhomchuk // Scientific Reports. - Т. 14, N 1. - С. 1-10.
DOI: https://doi.org/10.1038/s41598-024-79546-1

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48.
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Авторы:
Makarov George A., Baishev Dmitriy G., Moiseyev Aleksey V., Solovyev Stepan I., 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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49.
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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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50.
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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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