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Документы 71 - 80 из 272
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71.
Обложка
Авторы:
Gololobov P. Yu., Krivoshapkin P. A., Krymsky Germogen Filippovich, Grigoryev Vladislav Georgievich, Gerasimova S. K.
Заглавие: Investigating tensor anisotropy of cosmic rays during large-scale solar wind disturbances
Исследование тензорной анизотропии космических лучей во время крупномасштабных возмущений солнечного ветра

Количество страниц: 5 с.

Впервые произведено разложение наблюдаемой анизотропии космических лучей на зональные гармоники и компоненты векторной и тензорной анизотропии. Рассмотрены события форбуш-понижений космических лучей, произошедших в ноябре 2001 г и ноябре 2004 г. Показано, что в начале форбуш-понижения преобладает конвекционный ток космических лучей, направленный от Солнца, а в период восстановления интенсивности - диффузионный ток частиц вдоль межпланетного магнитного поля в сторону Солнца. На фазах спада интенсивности космических лучей наблюдается кратковременное уменьшение величины второй зональной гармоники, которое совпадает с резкими скачками напряженности межпланетного магнитного поля и скорости солнечного ветра. Во время прохождения крупномасштабных возмущений солнечного ветра тензорная анизотропия ведет себя сложным образом, для объяснения ее поведения требуется дальнейшее детальное исследование.
The observable anisotropy of cosmic rays has first been decomposed into zonal harmonics and components of vector and tensor anisotropy. We examine Forbush decreases in cosmic rays that occurred in November 2001 and November 2004. It is shown that at the beginning of a Forbush decrease an antisunward convective current of cosmic rays predominates; and during the recovery phase, a sunward diffusive current of particles along the interplanetary magnetic field dominates. During the phase of intensity drop, short-time decreases in the second zonal harmonic take place. These decreases occur with abrupt changes of the interplanetary magnetic field intensity and solar wind speed. During the passage of large-scale solar wind disturbances, the tensor anisotropy behaves in a complicated way. To explain its behavior, a further detailed investigation is required.

Investigating tensor anisotropy of cosmic rays during large-scale solar wind disturbances = Исследование тензорной анизотропии космических лучей во время крупномасштабных возмущений солнечного ветра / P. Yu. Gololobov, P. A. Krivoshapkin, G. F. Krymsky, V. G. Grigoryev, S. K. Gerasimova // Солнечно-земная физика = Solar-Terrestrial Physics. – 2017, т. 3, N 2 : 13-я российско-китайская конференция по космической погоде. – С. 22-26.
DOI: 10.12737/22604

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72.
Обложка
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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73.
Обложка
Авторы:
Boroyev Roman Nikolaevich, Velichko Vitaly Andreevich, Baishev Dmitriy Gavrilievich
Заглавие: Local increase of field-aligned current intensity before a substorm onset

Количество страниц: 4 с.

By using data treatment results of mid-latitude geomagnetic variations, the significant increase of the local current system intensity with the eastern direction current system, arising near the meridian of expected substorm center ~10-30 min before the break-up onset, has been found. A comparison of longitudinal sizes of two current system, forming the substorm disturbance before and after the onset of the substorm expansion phase, has been carried out. The longitudinal size of the current loop of the substorm growth phase is nearly twice as small as azimuth scale of the substorm current wedge, and the current strength is as week as 2.7-12 times.

Boroyev, R. N. Local increase of field-aligned current intensity before a substorm onset / R. N. Boroyev, V. A. Velichko, D. G. Baishev // 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. 279-282.

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74.
Обложка
Авторы:
Baishev Dmitriy Gavrilievich, Moiseyev Aleksey Vladimirovich, Bondar Elena Dmitrievna, Kobiakova Sargylana Egorovna, Yumoto Kiyohumi
Заглавие: MAGDAS-9 magnetometers observations of strong earthquakes

Количество страниц: 1 с.

MAGDAS-9 magnetometers observations of strong earthquakes : [тезисы докладов] / Baishev D. G., Moiseev A.V., Bondar E. D., Kobyakova S. E., Yumoto K. // 10th International conference "Problems of geocosmos", St. Petersburg, Petrodvorets, October 6-10, 2014. – St. Petersburg : [s. n.], 2014. – P. 106.

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75.
Обложка
Авторы:
Solovyev Stepan Ivanovich, Moiseyev Aleksey Vladimirovich, Yumoto Kiyohumi, Engebretson Mark
Заглавие: Magnetosphere-ionosphere response to magnetosphere compression by the solar wind

Количество страниц: 4 с.

Analysis of the global magnetosphere-ionosphere response to solar wind dynamic pressure variations under the negative IMF Bz has been performed. It is shown that an increase in the dynamic pressure leads to a double response of the ionospheric currents and aurora, i.e. simultaneously (within the accuracy of 1 min) and ~5-7 min afterward. Thereby, the eastward and westward convective electrojets are enhanced in the evening and morning sectors respectively, followed by the intensification of the westward current in the near midnight and evening sectors. The intensification of the electrojets is followed by extension of the diffuse precipitation zone and its high latitude boundary movement to the pole and to the east in the midnight-to-morning sector. In our case, no poleward or westward extension of aurora before midnight is observed. The disturbance triggered by a dynamic pressure increase may be considered as a convection disturbance associated with reconstruction of the DP2 current system.

Magnetosphere-ionosphere response to magnetosphere compression by the solar wind / S. I. Solovyev, A. V. Moiseyev, K. Yumoto, M. Engebretson // Physics of auroral phenomena : proceedings of the 26th annual seminar, 25 - 28 February 2003. – 2003. – P. 41-44.

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76.
Обложка
Авторы:
Solovyev Stepan Ivanovich, Moiseyev Aleksey Vladimirovich, Yumoto Kiyohumi, Engebretson Mark, Du A.
Заглавие: Magnetospheric-ionospheric response to variations in the solar wind dynamic pressure during positive IMF Bz and a sharp change of IMF By direction

Количество страниц: 2 с.

Magnetospheric-ionospheric response to variations in the solar wind dynamic pressure during positive IMF Bz and a sharp change of IMF By direction : [тезисы докладов] / S. I. Solovyev, A. V. Moiseyev, K. Yumoto, M. Engebretson, A. Du // Physics of auroral phenomena : 29th annual seminar, 27 February – 3 March 2006 : abstracts. – 2006. – P. 36.

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77.
Обложка
Авторы:
Baishev Dmitriy Gavrilievich, Barkova Elena Sergeevna, Mullayarov V. A., Samsonov Sergey Nikolaevich, Solovyev Stepan Ivanovich, Yumoto Kiyohumi
Заглавие: Manifestation of Magnetosphere Fluctuations during the Large Magnetic Storm of January 21-22, 2005

Количество страниц: 4 с.

Large-amplitude morning Pc5 magnetic pulsations during the main phase of intense magnetic storm were registered at magnetic stations of 190-200° magnetic meridians on January 21-22, 2005. Magnetic pulsations in the Pc5 frequency range observed at the GOES 10, 12 satellites in the noon and evening sectors exhibited a high degree of magnetic compessibility. A Los Alamos particle detector on board geostationary satellite observed the occurrence of energetic particle flux oscillations in the Pc5 band. The Pc5 pulsations were followed with the VLF-emission and riometer absorption modulation with the same period. The regions of maximal amplitude of Pc5 geomagnetic pulsations and deep modulation of riometer absorptions shifted to high latitudes in the same way. Significant and long-lasting compression of magnetosphere led, probably, to moderate pitch-angle diffusion of particle into the loss cone even at the middle latitudes. Analysis of coordinated data allowed us to suggest that a modulation effects of precipitating particles are caused by a compressional waves.

Manifestation of Magnetosphere Fluctuations during the Large Magnetic Storm of January 21-22, 2005 / D. G. Baishev, E. S. Barkova, V. A. Mullayarov, S. N. Samsonov, S. I. Solovyev, K. Yumoto // 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. 96-99.

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78.
Обложка
Автор:
Gavrilyeva Galina Alekseevna
Заглавие: Measurements of the mesosphere temperature by two molecular emissions in Yakutsk (62°N, 129,5°E)

Количество страниц: 4 с.

The results of the hydroxyl and oxygen molecules rotational temperature measurements during two observational seasons 1999-2001 at Maymaga station (φ=63°N;λ=129.50°E) are presented. The rotational temperatures of OH(6,2) and O2 (0,1) bands have been measured with the infrared spectrograph equipped by the cooled CCD registration system. It is shown that the amplitude of seasonal change of hydroxyl rotational temperature is greater than the molecular oxygen variation. OH temperatures have been systematically higher the O2 ones during winter. An abrupt decrease of the O2 intensity connected with the springtime transition of the atmospheric circulation is found in both time series. For the first time a change of the temperature vertical gradient sign caused by mesopause height displacemet to a higher (winter) level was shown in the data of August-September 2001.

Gavrilyeva, G. A. Measurements of the mesosphere temperature by two molecular emissions in Yakutsk (62°N, 129,5°E) / G. A. Gavrilyeva // Physics of auroral phenomena : proceedings of the 26th annual seminar, 25 - 28 February 2003. – 2003. – P. 198-201.

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79.
Обложка
Авторы:
Shishkina Elina Leonidovna, Abbas Syed
Заглавие: Method of Riesz potentials applied to solution to nonhomogeneous singular wave equations

Количество страниц: 24 с.

Riesz potentials are convolution operators with fractional powers of some distance (Euclidean, Lorentz or other) to a point. From application point of view, such potentials are tools for solving differential equations of mathematical physics and inverse problems. For example, Marsel Riesz used these operators for writing the solution to the Cauchy problem for the wave equation and theory of the Radon transform is based on Riesz potentials. In this article, we use the Riesz potentials constructed with the help of generalized convolution for solution to the wave equations with Bessel operators. First, we describe general method of Riesz potentials, give basic definitions, introduce solvable equations and write suitable potentials (Riesz hyperbolic B-potentials). Then, we show that these potentials are absolutely convergent integrals for some functions and for some values of the parameter representing fractional powers of the Lorentz distance. Next we show the connection of the Riesz hyperbolic B-potentials with d’Alembert operators in which the Bessel operators are used in place of the second derivatives. Next we continue analytically considered potentials to the required parameter values that includes zero and show that when value of the parameter is zero these operators are identity operators. Finally, we solve singular initial value hyperbolic problems and give examples.

Shishkina, E. L. Method of Riesz potentials applied to solution to nonhomogeneous singular wave equations / E. L. Shishkina, S. Abbas // Математические заметки СВФУ. — 2018. — Т. 25, N 3 (99), июль-сентябрь. — С. 68-91.
DOI: 10.25587/SVFU.2018.99.16952

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80.
Обложка
Авторы:
Gololobov Artem Yu., Golikov Innokenty A., Varlamov I. I.
Заглавие: Modeling the influence of magnetospheric heat fluxes on the electron temperature in the subauroral ionosphere
Моделирование влияния магнитосферных потоков тепла на температуру электронов в субавроральной ионосфере

Количество страниц: 4 с.

Gololobov, A. Yu. Modeling the influence of magnetospheric heat fluxes on the electron temperature in the subauroral ionosphere = Моделирование влияния магнитосферных потоков тепла на температуру электронов в субавроральной ионосфере / A. Yu. Gololobov, I. A. Golikov, I. I. Varlamov // Солнечно-земная физика = Solar-Terrestrial Physics. – 2017. – Т. 3, N 2 : 13-я российско-китайская конференция по космической погоде. – С. 54-57. – DOI: 10.12737/22595.
DOI: 10.12737/22595

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