Sunspot waves and flare energy release

We address a possibility of the flare process initiation and further maintenance of its energy release due to a transformation of sunspot longitudinal waves into transverse magnetic loop oscillations with initiation of reconnection. This leads to heating maintaining after the energy release peak and formation of a flat stage on the X-ray profile. We applied the time-distance plots and pixel wavelet filtration (PWF) methods to obtain spatio-temporal distribution of wave power variations in SDO/AIA data. To find magnetic waveguides, we used magnetic field extrapolation of SDO/HMI magnetograms. The propagation velocity of wave fronts was measured from their spatial locations at specific times. In correlation curves of the 17 GHz (NoRH) radio emission we found a monotonous energy amplification of 3-min waves in the sunspot umbra before the 2012 June 7 flare. This dynamics agrees with an increase in the wave-train length in coronal loops (SDO/AIA, 171 {\AA}) reaching the maximum 30 minutes prior to the flare onset. A peculiarity of this flare time profile in soft X-rays (RHESSI, 3-25 keV) is maintaining the constant level of the flare emission for 10 minutes after the short impulse phase, which indicates at the energy release continuation. Throughout this time, we found 30-sec period transverse oscillations of the flare loop in the radio-frequency range (NoRH, 17 GHz). This periodicity is apparently related to the transformation of propagating longitudinal 3-min waves from the sunspot into the loop transverse oscillations. The magnetic field extrapolation showed the existence of the magnetic waveguide (loop) connecting the sunspot with the energy release region. A flare loop heating can be caused by the interaction (reconnections) of this transversally oscillating waveguide with the underlying twisted loops.Comment: 7 pages, 9 figure

Risk estimation as an element of management mechanism in system of organization of health care and public health

Protection of health of military servicemen stays one of priorities of state policy of the Russian Federation. Reforms in our country reflected themselves on condition of health and quality of life of our population [1]. Major directions of health care are disclosed in "Concept of development of health care and medical science in the Russian Federation". The major task is the increase of quality of aid provided, rational use of resources. At contemporary stage the problem of military servicemen health protection is actual [2]. This problem is significant both for military servicemen by draft and by conditions of contract service. Numerous scientific researches are observing a high level of morbidity among military servicemen. More than a half of officer staff has chronic diseases that increase their professional suitability [3, 4]. Contemporary methods of research are applied in this research: sociological, hygienic, risk-metrical, bio-chemical, statistic. A research of risk-metrical estimation of system of indexes forming biomedical direction of military type of technogenesis was conducted for the first time. On basis of discriminant analysis the model of reproduction risk allowing to develop conditions of risk optimization was developed for the first time. For researched work 22 848 information units were collected and processed

Assessing the Impact of Innovative Technologies on the Life Satisfaction of Older Adults in Russia and Vietnam

Received 4 April 2023. Accepted 8 August 2023. Published online 6 October 2023.This study uses the concept of “technological space,” a term that defines the interplay between the social and technological environment, extending our understanding of environmental factors in various scientific domains. We examine the significance of technological space by looking at how older adults interact with modern technologies in the regional contexts of Russia and Vietnam. This study is motivated by the need to integrate older adults into the regional technological landscape. Although older adults face various challenges that may prevent them from adopting modern technologies in their daily lives, embracing these high-tech products and services can greatly improve their overall happiness and well-being. The analysis draws upon the data gathered through a sociological study in Russia’s Tomsk region and a parallel study conducted in Vietnam in 2022. The research outcomes show a noticeable contrast in older individuals’ readiness to embrace innovative technologies, highlighting their openness to adaptation under specific circumstances. Additionally, these findings underscore the limited and varied extent to which older generations engage with the contemporary regional technological space, as well as the constrained impact of innovative technology on their life satisfaction. These findings can be useful for regional policymakers seeking to enhance the adaptability of older adults in the face of socio-economic challenges.The study was supported by the Russian Science Foundation, project No. 19-18-00300, https://rscf.ru/project/19-18-00300/

Eruptions of Magnetic Ropes in Two Homologous Solar Events on 2002 June 1 and 2: a Key to Understanding of an Enigmatic Flare

The goal of this paper is to understand the drivers, configurations, and scenarios of two similar eruptive events, which occurred in the same solar active region 9973 on 2002 June 1 and 2. The June 2 event was previously studied by Sui, Holman, and Dennis (2006, 2008), who concluded that it was challenging for popular flare models. Using multi-spectral data, we analyze a combination of the two events. Each of the events exhibited an evolving cusp-like feature. We have revealed that these apparent ``cusps'' were most likely mimicked by twisted magnetic flux ropes, but unlikely to be related to the inverted Y-like magnetic configuration in the standard flare model. The ropes originated inside a funnel-like magnetic domain whose base was bounded by an EUV ring structure, and the top was associated with a coronal null point. The ropes appear to be the major drivers for the events, but their rise was not triggered by reconnection in the coronal null point. We propose a scenario and a three-dimensional scheme for these events in which the filament eruptions and flares were caused by interaction of the ropes.Comment: 22 pages, 11 figure

An Extreme Solar Event of 20 January 2005: Properties of the Flare and the Origin of Energetic Particles

The extreme solar and SEP event of 20 January 2005 is analyzed from two perspectives. Firstly, we study features of the main phase of the flare, when the strongest emissions from microwaves up to 200 MeV gamma-rays were observed. Secondly, we relate our results to a long-standing controversy on the origin of SEPs arriving at Earth, i.e., acceleration in flares, or shocks ahead of CMEs. All emissions from microwaves up to 2.22 MeV line gamma-rays during the main flare phase originated within a compact structure located just above sunspot umbrae. A huge radio burst with a frequency maximum at 30 GHz was observed, indicating the presence of a large number of energetic electrons in strong magnetic fields. Thus, protons and electrons responsible for flare emissions during its main phase were accelerated within the magnetic field of the active region. The leading, impulsive parts of the GLE, and highest-energy gamma-rays identified with pi^0-decay emission, are similar and correspond in time. The origin of the pi^0-decay gamma-rays is argued to be the same as that of lower energy emissions. We estimate the sky-plane speed of the CME to be 2000-2600 km/s, i.e., high, but of the same order as preceding non-GLE-related CMEs from the same active region. Hence, the flare itself rather than the CME appears to determine the extreme nature of this event. We conclude that the acceleration, at least, to sub-relativistic energies, of electrons and protons, responsible for both the flare emissions and the leading spike of SEP/GLE by 07 UT, are likely to have occurred simultaneously within the flare region. We do not rule out a probable contribution from particles accelerated in the CME-driven shock for the leading GLE spike, which seemed to dominate later on.Comment: 34 pages, 14 Postscript figures. Solar Physics, accepted. A typo corrected. The original publication is available at http://www.springerlink.co

STUDY OF STRUCTURAL CHANGES IN THE COLLAGEN MATERIAL MODYFIED BY PLASMA METHODS

A study of changes in the structure of the protein component of natural collagen-containing material was made. By the x-ray diffraction analysis was found that the molecular structure of the protein does not change when a high frequency plasma exposed on a material. The application of nanostructured coatings from the plasma phase also does not change the structure of the substrate

THE BACTERICIDAL EFFECT ON SURFACES TREATED BY HIGH FREQUENCY PLASMA

A study of duration of antimicrobial properties of collagen materials treated in high frequency plasma was made. It is established that the antibacterial effect is retained for not more than two years

RESEARCH OF STRUCTURE OF POROUS POLYETHYLENE FILMS BASED ON A MINERAL FILLER

In the paper, polymer polyethylene films with a mineral filler CaCO3 were studied by gas dynamic porosimetry

RESEARCH OF HYGIENIC PROPERTIES OF POROUS POLYETHYLENE FILMS WITH CaCO3

The complex of hygienic properties of polymeric polyethylene (PE) films with mineral filler СаСО3 is experimentally investigated