Gamma-Ray Polarimetry of Two X-Class Solar Flares

We have performed the first polarimetry of solar flare emission at gamma-ray energies (0.2-1 MeV). These observations were performed with the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) for two large flares: the GOES X4.8-class solar flare of 2002 July 23, and the X17-class flare of 2003 October 28. We have marginal polarization detections in both flares, at levels of 21% +/- 9% and -11% +/- 5% respectively. These measurements significantly constrain the levels and directions of solar flare gamma-ray polarization, and begin to probe the underlying electron distributions.Comment: 33 pages, 12 figures, accepted for publication in Ap

Zoning of the Kazan City territory by the stability of foundation soil during dynamic impact

© 2017, Advanced Engineering Solutions [AES.COM] Ottawa, Canada. All rights are reserved. The article presents the results of zoning of the Kazan City territory by dynamic instability of the foundation soils. The work is based on mathematical analysis of databases of the geological environment digital model constructed by the results of drilling more than one thousand boreholes. This GIS model incorporates all the environment components necessary to evaluate the occurrence possibility of soil dynamic instability patterns: spatial location of sands, their grain-size composition and the database of mechanical properties of soils and rocks. A complex of some criteria such as the soil occurrence depth, degree of humidity, relative density made it possible to distinguish the soil conditions subtypes and also to construct the map of potentially possible dynamic instability for the city territory

Seismic Fluidification of Soil in the Bed of the Kazanskaya Riviera Tower

© 2016 Springer Science+Business Media New YorkA procedure and results are examined for experimentally studying the seismic stability of sandy soil in the bed of a developed high-rise building in Kazan’ city. It is shown that the studied soil are not susceptible to fluidification in response to expected seismic events, although in certain of these, development of large additional deformations is predicted, which should be taken into account in design

Seismic Fluidification of Soil in the Bed of the Kazanskaya Riviera Tower

© 2016, Springer Science+Business Media New York.A procedure and results are examined for experimentally studying the seismic stability of sandy soil in the bed of a developed high-rise building in Kazan’ city. It is shown that the studied soil are not susceptible to fluidification in response to expected seismic events, although in certain of these, development of large additional deformations is predicted, which should be taken into account in design

A statistical correlation of sunquakes based on their seismic and white-light emission

Several mechanisms have been proposed to explain the transient seismic emission, i.e. “sunquakes,” from some solar flares. Some theories associate high-energy electrons and/or white-light emission with sunquakes. High-energy charged particles and their subsequent heating of the photosphere and/or chromosphere could induce acoustic waves in the solar interior. We carried out a correlative study of solar flares with emission in hard X-rays, enhanced continuum emission at 6173 Å, and transient seismic emission. We selected those flares observed by the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) with a considerable flux above 50 keV between 1 January 2010 and 26 June 2014. We then used data from the Helioseismic and Magnetic Imager onboard the Solar Dynamic Observatory to search for excess visible-continuum emission and new sunquakes not previously reported. We found a total of 18 sunquakes out of 75 flares investigated. All of the sunquakes were associated with an enhancement of the visible continuum during the flare. Finally, we calculated a coefficient of correlation for a set of dichotomic variables related to these observations. We found a strong correlation between two of the standard helioseismic detection techniques, and between sunquakes and visible-continuum enhancements. We discuss the phenomenological connectivity between these physical quantities and the observational difficulties of detecting seismic signals and excess continuum radiation

PERSONALITY PECULIARITIES OF PREGNANT WOMEN EXPECTING THEIR FIRST CHILDREN

The first pregnancy and its outcome have great importance for the subsequent development of the individual as the subject of women of reproductive behavior, family relationships as well as the effectiveness of the professional selfrealization. It is known that personality traits affect the enjoyment by women of reproductive function. The article presents the results of a study to determine the role of age-related factors in the formation of personality traits and mental health of pregnant women with the birth of a child under the present conditions of socialization. The study was conducted in antenatal maternity Tomsk during 2003-2007 years, there have been psychological examination of 102 healthy pregnant women aged 19-37 years who were waiting for their first child. The study was conducted by a continuous method on a voluntary basis. Number of pregnant women under 20 years was 22, of 20-25-year-olds -42 and of 26 year olds and older - 38 women. Average age - 25,4 years, mean duration of pregnancy - 19 weeks. To study the structure and personality traits women test MMPI was used. Emotional relationship of pregnant women to significant persons and situations, partly bypassing the verbal defense mechanisms were examined by Etkind's color relationships. Computer processing and data analysis were performed using standard Microsoft Office programs and applied statistical package Statistica 6.0. The study showed that women in the period of pregnancy were characterized by an invariant state of personal, psychic sphere, which has both age determination and due to previous experience of sex-role behavior. At the same time there are typological differences not only in the structure of personality traits, but also in the features of value orientations and outlook of women, depending on the experience of their socialization as subjects of sexual and reproductive behavior. In particular, older women revealed the presence of a kind of "psychological defense" to explain the reasons for the relatively late birth of their first child. The study results complement the current theoretical understanding of the psychological aspects of female reproductive function, allows us to offer solutions to a number of important scientific and practical and social problems

X-ray microtomography and grain size analysis of bituminous sandstones from Ashalchinskoye oil field

X-ray microtomography on 4.6 mm long 4.7 mm diameter samples of bituminous sandstones from Ashalchinskoye oil field was performed with a spatial resolution of 5.8?m. The representative elementary volumes for grain size distribution were estimated along with porosity and permeability coefficients for digital cube geometry ranged between 0.3 and 3.5 mm (0.03-43 mm3).The representative elementary volume for grain size distribution was achieved at cube edge length of 2.3 mm (12.2 mm3). This value is almost 2 times higher than the estimation of representative elementary volume for absolute permeability tensor and almost 4 times higher than the estimation for porosity coefficient. It is shown that Kozeny's formula characterizing the dependence of the effective permeability coefficient on the grain diameter and the porosity gives lower values, compared with the permeability coefficients obtained by modeling flow processes on digital images

SPECTRAL RESPONSE IN LASER SYNTHESIZED WxMo(1-x)S2 ALLOYS

We report the spectral response of 2D WxMo1-xS2 alloys based photoconductors fabricated by direct laser synthesis of single source precursors. A comparative study for the main figure of merits of these devices is presented

Recent Advances in Understanding Particle Acceleration Processes in Solar Flares

We review basic theoretical concepts in particle acceleration, with particular emphasis on processes likely to occur in regions of magnetic reconnection. Several new developments are discussed, including detailed studies of reconnection in three-dimensional magnetic field configurations (e.g., current sheets, collapsing traps, separatrix regions) and stochastic acceleration in a turbulent environment. Fluid, test-particle, and particle-in-cell approaches are used and results compared. While these studies show considerable promise in accounting for the various observational manifestations of solar flares, they are limited by a number of factors, mostly relating to available computational power. Not the least of these issues is the need to explicitly incorporate the electrodynamic feedback of the accelerated particles themselves on the environment in which they are accelerated. A brief prognosis for future advancement is offered.Comment: This is a chapter in a monograph on the physics of solar flares, inspired by RHESSI observations. The individual articles are to appear in Space Science Reviews (2011

High-Energy Aspects of Solar Flares: Overview of the Volume

In this introductory chapter, we provide a brief summary of the successes and remaining challenges in understanding the solar flare phenomenon and its attendant implications for particle acceleration mechanisms in astrophysical plasmas. We also provide a brief overview of the contents of the other chapters in this volume, with particular reference to the well-observed flare of 2002 July 23Comment: This is the introductory article for a monograph on the physics of solar flares, inspired by RHESSI observations. The individual articles are to appear in Space Science Reviews (2011