Отраслевые подборки (УДК)
Издания подборки 61 - 70 из 4646
61.

Количество страниц: 8 с.

The process of the paraffin type asphaltene-resin-paraffin deposits dissolution in the alkane base gas condensate, hexane-benzene mixture (HBM) and hexane at 10 and 25°C is investigated. These deposits are formed during oil production in the Irelyakh field. The comparative effectiveness evaluation of studied solvents is performed by the widely used in practice "baskets" method and the results of kinetic studies.

Ivanova, I. K. Use of a kinetic study for the effectiveness evaluation of asphaltene-resin-paraffin deposits (ARPD) solvents / I. K. Ivanova, E. Yu. Shitz // Нефтегазовое дело. - 2012, N 3. - С. 353-359.

62.
Авторы:
Jackson Fiona , Джексон Фиона

Год выпуска: 2022

О гибриде бурого и белого медведей "бролар", c комментариями биолога Сибирского отделения Российской академии наук (СБРАС) Иннокентия Охлопкова
63.
Авторы:
Jackson Fiona, Джексон Фиона

Год выпуска: 2022

О вероятности происхождении собак от волков
64.
Автор:
Jaderholm Axel Elof

Издательство: Buchdrukerei der Kaiserlichen Akademie der Wissenschaften

Год выпуска: 1908

Количество страниц: 28 с.

65.

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.

66.
Авторы:
Kalischewskij M., Калишевский М.

Издательство: Buchdrukerei der Kaiserlichen Akademie der Wissenschaften

Год выпуска: 1907

Количество страниц: 67 с.

67.
Авторы:
Kerr Chloe , Керр Хлоя

Год выпуска: 2018

Об экстремальных зимних холодах в Якутии
68.
Авторы:
Kertysova Katarina, Катарина Кертисова, Рамнат Акаш, Ramnath Akash

Год выпуска: 2021

О проблемах потепления климата
69.

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

70.
Автор:
Konow Fr. W.

Издательство: Buchdrukerei der Kaiserlichen Akademie der Wissenschaften

Год выпуска: 1907

Серия, номер выпуска: Научные результаты Русской Полярной Экспедиции 1900-1903 гг., под начальством барона Э. В. Толля; Т. 1, вып. 3

Количество страниц: 44 с.