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  2. НАУКА ЯКУТИИ
  3. МАТЕМАТИКА. ЕСТЕСТВЕННЫЕ НАУКИ
Издания подборки 1 - 10 из 63
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1.
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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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2.
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Авторы:
Koponen Seppo, Potapova Nadezhda Konstantinovna, Burnasheva Albina P.
Заглавие: Current knowledge of spider fauna (Araneae) of Yakutia
Современное состояние изученности фауны пауков (Araneae) Якутии

Количество страниц: 4 с.

Обобщены сведения о современном составе фауны пауков (Araneae) Якутии. Приведены виды из статей по Якутии, опубликованных после обобщающего списка видов [Marusik et al., 1993], а также некоторые номенклатурные изменения. В настоящее время фауна пауков насчитывает 446 видов из 20 семейств; за последние 20 лет 22 вида представлены как новые для региона, пять из них - новые для науки. В северной Якутии для некоторых видов были указаны самые северные точки распространения.

Koponen, S. Current knowledge of spider fauna (Araneae) of Yakutia / S. Koponen, N. K. Potapova, A. P. Burnasheva // Евразиатский энтомологический журнал. – 2014, Т. 13, N 5. – С. 430-433.

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3.
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Авторы:
Solovyev Stepan Ivanovich, Moiseyev Aleksey Vladimirovich, Mullayarov V. A., Du A., Engebretson Mark, Newitt L. R.
Заглавие: Global geomagnetic response to the sharp magnetosphere compression and imf variations on october 29, 2003

Количество страниц: 1 с.

Sources of excitation and damping of PC5 geomagnetic pulsations during the magnetic storms of october 29-31, 2003 influence of the solar wind and auroral electrojets : [тезисы докладов] / Solovyev S. I., Moiseyev A. V., Mullayarov V. A., Du A., Engebretson M., Newitt L. R. // International symposium on Solar Extreme Events of 2003 : programme and abstract book. – Москва : УНЦ ДО, 2004. – P. 60.

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4.
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Авторы:
Baishev Dmitriy Gavrilievich, Barkova Elena Sergeevna, Solovyev Stepan Ivanovich, Yumoto Kiyohumi, Engebretson Mark, Koustov A. V.
Заглавие: Formation of large-scale, "giant" undulations at the equatorial boundary of diffuse aurora and Pc5 magnetic pulsations during the January 14, 1999 magnetic storm

Количество страниц: 4 с.

In the present study we investigate the undulations at the equatorial boundary of diffuse aurora and their relationship to the development of magnetic and auroral substorms and excitation of Pc5 magnetic pulsation on January 14, 1999. The observed undulations had wave-length of ~200-300 km and amplitude of ~50-250 km and they propagated westward with the velocity of ~0,7 km/s. It is found that the undulations began ~40 min after the substorm onset and lasted for ~80 min, all the way to the end of the substorm. During both active and recovery phases of the substorm the undulations were accompanied by the enhancement of the DP2 equivalent current system and by the formation of WTS. Concurrently with undulations, there were observed Pc5 magnetic pulsations of an oscillation period roughly equal to the ratio of the undulation wavelength to their propagation velocity. Observations are interpreted in terms of the shear/ballooning instability excitation near the plasmapause and subsequent generation of drift hydromagnetic waves.

Formation of large-scale, "giant" undulations at the equatorial boundary of diffuse aurora and Pc5 magnetic pulsations during the January 14, 1999 magnetic storm / D. G. Baishev, E. S. Barkova, S. I. Solovyev, K. Yumoto, M. J. Engebretson and A. V. Koustov // 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. 427-430.

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5.
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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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6.
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Авторы:
Moiseyev Aleksey Vladimirovich, Solovyev Stepan Ivanovich, Yumoto Kiyohumi, Engebretson Mark
Заглавие: Global geomagnetic and auroral response to the variation in the solar wind dynamic pressure

Количество страниц: 2 с.

Global geomagnetic and auroral response to the variation in the solar wind dynamic pressure : [тезисы докладов] / A. V. Moiseyev, S. I. Solovyev, K. Yumoto, M. Engebretson // Physics of auroral phenomena : 30th annual seminar, 27 February – 2 March 2007 : abstracts. – 2007. – P. 34.

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7.
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Авторы:
Solovyev Stepan Ivanovich, Moiseyev Aleksey Vladimirovich, Engebretson Mark, Yumoto Kiyohumi
Заглавие: Evolution of ionospheric current systems for the geomagnetic impulse SI/SC by the magnetometer global network data

Количество страниц: 2 с.

Evolution of ionospheric current systems for the geomagnetic impulse SI/SC by the magnetometer global network data : [тезисы докладов] / S. I. Solovyev, A. V. Moiseyev, M. Engebretson, K. Yumoto // Physics of auroral phenomena : 24 annual seminar, 27 February - 2 March 2001. – 2001. – P. 36.

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8.
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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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9.
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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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10.
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Авторы:
Baishev Dmitriy Gavrilievich, Rich F. J.
Заглавие: Undulations Observed by the DMSP Satellites during Magnetic Superstorms of November 2004

Количество страниц: 4 с.

DMSP satellite observations and magnetic measurements at the Yakutsk observatory (φ=62°N, λ=129.6°E, L=3.3) are used to investigate the characteristics of undulations of the equatorward boundary of diffuse aurora and their relationship to the Pc5 magnetic pulsations in the evening sector during two successive magnetic superstorms at the beginning of November 2004. The large-scale undulations were observed by DMSP satellites near Yakutsk (φ~59-62°) at 0924-0932 UT on November 8, 2004 during the storm recovery phase and at~0841 UT on November 10, 2004 during the main phase of storm. They had the wavelength of λ450-500 km and the the amplitude of A~150 km for the first event, and λ~250 km and A~100 km for the second event, respectively. The estimated velocity of westward propagation for undulations during the first event was equal to V~1.4 km/s. The appearance of undulations for both events near Yakutsk was accompanied by geomagnetic Pc5 pulsations with periods of ~4-8 min, registered at the station. The behavior of undulations and fast plasma flows with concurrent Pc5 pulsations is discussed.

Baishev, D. G. Undulations Observed by the DMSP Satellites during Magnetic Superstorms of November 2004 / D. G. Baishev, F. J. Rich // 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. 100-103.

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