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Поток тепла как источник ионно-звуковых колебаний в переходном слое солнечной атмосферы
Письма в Астрономический журнал. 2009. Т. 35. № 5. С. 382-388.
Based on model calculations, we show that ion-acoustic oscillations can be excited by heat fluxes in a plasma. We discuss the probable effect of ion-acoustic oscillations on the formation of temperature gradients at critical heat fluxes. The local critical heat flux in the transition region of the solar atmosphere is close to the well-known experimental heat flux from the corona into the chromosphere.
Priority areas:
engineering science
Language:
Russian
Bespalov P. A., Savina O. N., Письма в Астрономический журнал 2008 Т. 34 № 5 С. 378-386
The generalized Wiedemann-Franz law for a nonisothermal quasi-neutral plasma with developedion-acoustic turbulence and Coulomb collisions has been proven. The results obtained are used to explain the anomalously low thermal conductivity in the chromosphere-corona transition region of the solar atmosphere. Model temperature distributions in the lower corona and the transition region that correspond to well-known experimental ...
Added: December 12, 2012
Savina O. N., Bespalov P. A., Central European Astrophysical Bulletin 2011 Vol. 35 No. 1 P. 83-91
Within the framework of model calculations the possibility of occurrence of the ion-acoustic oscillation instability in a plasma without current and particle fluxes, but with an anisotropic distribution function, which corresponds to heat flux is shown. The model distribution function was selected taking into account the medium conditions. The increment of ion-acoustic oscillation is investigated ...
Added: December 12, 2012
Bespalov P. A., O.N. Savina, Astronomy Letters 2015 Vol. 41 No. 10 P. 601-605
We discuss the connection of the formation and properties of solar atmosphere transition region
characterized by a steep electron temperature gradient with electrostatic turbulence, which provides a high
effective electron collision frequency and a low thermal conductivity of the medium. A simple dependence
of the noise electric field in the transition region on the effective collision frequency has ...
Added: September 30, 2015
Bespalov P. A., Savina O. N., Monthly Notices of the Royal Astronomical Society 2007 Vol. 382 No. 1 P. L63-L66
In this Letter, the generalized Wiedemann-Franz law for the non-isothermic quasi-neutral plasma with developed ion-acoustic turbulence is proved. This law determines the relationship between electrical and thermal conductivities in a plasma with well-developed ion-acoustic turbulence. The anomalously low thermal conductivity, which leads to the formation of high temperature gradients in the zone of the temperature ...
Added: December 12, 2012
П.А. Беспалов, О.Н. Савина, Письма в Астрономический журнал 2015 Т. 41 № 10 С. 651-656
The connection of between the formation and properties of areas characterized by the sharp gradient of electron temperature, with electrostatic turbulence, providing high a high effective electrons collision frequency and a low thermal conductivity of medium, is discussed. Simple dependences for the thermal conductivity, effective collision frequency and noise electric fields are obtained. For ...
Added: June 4, 2015
Petrukhin N., Pelinovsky E., Batsyna E. K., Письма в Астрономический журнал 2012 Т. 38 № 6 С. 439-445
The possibility that vertical acoustic waves with frequencies lower than the cutoff frequency corresponding to the temperature minimum pass this minimum is investigated. It is shown that the averaged temperature profile in the solar atmosphere can be approximated by several so-called reflectionless profiles on which the acoustic waves propagate without internal reflection. The possibility of ...
Added: May 3, 2012
O.N. Savina, , in : RECENT ADVANCES on COMPUTATIONAL SCIENCE and APPLICATIONS. [Proceedings of the 4th International Conference on Applied and Computational Mathematics (ICACM '15)]. Issue 52: Mathematics and Computers in Science and Engineering Series.: Seul : World Scientific and Engineering Academy and Society, 2015. P. 19-22.
Analytically and numerically calculations according to the original effective algorithms for largescale
acoustic-gravity wave perturbations in the chromosphere from sources at the level of the photosphere are
analyzed. Limitations to the energy flux of acoustic-gravity waves from the photosphere through the
chromosphere are formulated. Structure of a narrow region with elevated pressure at the resonance altitude
where the horizontal ...
Added: October 13, 2015
М. : Энциклопедия, Инфра-М, 2018
The New Russian Encyclopedia is a fundamental reference publication in 18 volumes that characterizes nature, population, economy, history, science, art, technology and other important aspects. Contains about 60,000 articles, about 30,000 biographies, about 15,000 color illustrations, maps, charts, diagrams, tables. Leaves since 2003. ...
Added: October 28, 2018
Blythe D., Haufe S., Müller K. et al., Neuroimage 2014 Vol. 99 No. 1 P. 377-387
Although the long-range temporal correlation (LRTC) of the amplitude fluctuations of neuronal EEG/MEG oscillations is widely acknowledged, the majority of studies to date have been performed in sensor space, disregarding the mixing effects implied by volume conduction and confounding noise. While the effect of mixing on the evaluation of evoked responses and connectivity measures has been ...
Added: February 17, 2015
Институт проблем технологии микроэлектроники и особочистых материалов РАН, 2014
В докладах конференции рассмотрены проблемы рентгеновской кристаллооптики, многослойной оптики для рентгеновского и экстремального ультрафиолетового диапазона, технологии изготовления элементов рентгеновской оптики, применения рентгеновской оптики для исследования микро- и наноструктур, рентгеновской литографии, рентгеновской микроскопии и томографии, новых методы исследования микро- и наноструктур с использованием синхротронных и лабораторных источников рентгеновского излучения. ...
Added: November 30, 2015
Zakhodiakin G., Успехи в химии и химической технологии 2014 Т. 28 № 10 (159) С. 97-100
This paper describes an approach to supply chain network optimization for a petrochemical enterprise. The state-task network is used for supply chain representation. A framework for comprehensive economic and environmental assessment based on life cycle assessment is proposed. The software implementation of proposed methodology is described. ...
Added: February 27, 2016
М. : Энциклопедия, Инфра-М, 2017
The New Russian Encyclopedia is a fundamental reference publication in 18 volumes that characterizes nature, population, economy, history, science, art, technology and other important aspects. Contains about 60,000 articles, about 30,000 biographies, about 15,000 color illustrations, maps, charts, diagrams, tables. Leaves since 2003. ...
Added: October 31, 2018
Dagaev N., Volkova K., Ossadtchi A., Journal of Neural Engineering 2018 Vol. 15 No. 1 P. 1-14
Objective. Brain-computer interface (BCI) systems are known to be vulnerable to variabilities in background states of a user. Usually, no detailed information on these states is available even during the training stage. Thus there is a need in a method which is capable of taking background states into account in an unsupervised way. Approach. We ...
Added: October 19, 2017
Ермоленко Г. В., Proskuryakova L. N., Ермоленко Б. В., Foresight 2017 Vol. 19 No. 5 P. 528-540
Purpose – The purpose of the study is to show the technical potentials of a variety of renewable energy sources in Russia, as well as benefits from their deployment including hydrocarbon savings, emission reduction and lower energy cost. Design/methodology/approach – In the paper, Russia is compared with other countries in terms of actual installed capacity ...
Added: September 25, 2017
Pelinovsky E., E.G. Shurgalina, Sergeeva A. et al., Physical Letters A 2013 Vol. 377 No. 1 P. 272-275
Two-soliton interactions play a definitive role in the formation of the structure of soliton turbulence in integrable systems. To quantify the contribution of these interactions to the dynamical and statistical characteristics of the nonlinear wave field of soliton turbulence we study properties of the spatial moments of the two-soliton solution of the Korteweg–de Vries (KdV) ...
Added: January 18, 2013
Volkova K., Dagaev N., Киселёв А. С. et al., Журнал высшей нервной деятельности им. И.П. Павлова 2017 Т. 67 № 4 С. 504-520
Brain-computer interfaces find application in a number of different areas and have the potential to be used for research as well as for practical purposes. The clinical use of BCI includes current studies on neurorehabilitation ([Frolov et al., 2013; Ang et al., 2010]), and there is the prospect of using BCI to restore movement and ...
Added: October 19, 2017
Proskuryakova L. N., Юдина О. Н., ТЭК России 2017 № 7 С. 30-32
6–9 июня 2017 года в Пекине (Китай) прошла серия мероприятий и встреч высокого уровня по вопросам энергетического сотрудничества, устойчивого развития, повышения энергоэффективности и развития энергетически чистых технологий.
Ключевым мероприятием энергодиалога стран БРИКС (Бразилия, Россия, Индия, Китай, ЮАР) в 2017 году стала Министерская встреча, которая состоялась в Пекине 7 июня. В центре дискуссии оказались вопросы дальнейшей институционализации ...
Added: September 28, 2017
Боброва Е. В., Решетникова В. В., Volkova K. et al., Журнал высшей нервной деятельности им. И.П. Павлова 2017 Т. 67 № 4 С. 485-492
Исследовали обучение управлению системой “Интерфейс мозг-компьютер” (ИМК) с помощью специально разработанного тренинга. Тренинг включал осуществление медленных циклических движений правой и левой рукой (длительность каждого движения соответствовала длительности представлений движений руки при работе с ИМК), представление этих движений, а также спокойное сидение до начала движений. До проведения тренинга и после него осуществлялось управление ИМК. По тесту ...
Added: October 20, 2017
М. : Энциклопедия, Инфра-М, 2017
The New Russian Encyclopedia is a fundamental reference publication in 18 volumes that characterizes nature, population, economy, history, science, art, technology and other important aspects. Contains about 60,000 articles, about 30,000 biographies, about 15,000 color illustrations, maps, charts, diagrams, tables. Leaves since 2003. ...
Added: October 29, 2018
Pelinovsky E., Диденкулова И. И., Диденкулов О. И., Известия РАН. Физика атмосферы и океана 2014 Т. 50 № 5 С. 604-611
We study the runup of long solitary waves of different polarities on a beach in the case of composite bottom topography: a plane sloping beach transforms into a region of constant depth. We confirm that nonlinear wave deformation of positive polarity (wave crest) resulting in an increase in the wave steepness leads to a significant ...
Added: November 19, 2014
M. : HSE, 2013
Human reasoning uses to distinguish things that do change and things do not. The latter are commonly expressed in the reasoning as objects, which may represent classes or instances, and classes being further divided into concept types and relation types. These became the main issue of knowledge engineering and have been well tractable by computer. ...
Added: October 27, 2013
Plusnin J., М. : Научный мир, 2013
The book is a kind of information and methodological handbook on environmental and climate issues. It consists two parts. The first section provides information about the weather and out-climate change. They guide the reader to the problem of the influence climate change on our lives. The second section is special, a step-by-step description of observations ...
Added: February 18, 2013
Maslennikova I., Kovalev V., Eronko O. et al., WIT Transactions on Ecology and The Environment 2014 Vol. 190 P. 551-556
Protection of the environment can be achieved by creating conditions that ensure the complete absence, or at least minimal content, of hazardous substances in industrial waste. Therefore, in production processes where the main and/or additive product is material with mercury content, the prevention of mercury vapor emissions into the atmosphere is an essential prerequisite for ...
Added: March 25, 2015