Social ecology: some conceptual and methodological aspects

Предметом социальной экологии становится анализ жизнедеятельности общественно-индустриального социума на определенном структурном уровне: поселенческом, городском, региональном. Базовой методологической структурой науки является социоэкосистема.The subject of social ecology is an analysis of the socio-industrial society on a structural level: settlement, city, regional. Basic methodological structure of these science is socioecosistema

The main directions of the field development systems improvement and the potential of oil extraction increase in Ukraine

The main reasons for reduction of oil and gas extraction in Ukraine are presented. The priority directions for improving the oil and gas field development systems and the potential increase of oil and gas extraction volumes in Ukraine are substantiated. The possibility of involvement of passive reserves of oil in active development and increase of the annual oil extraction by implementation of modern oil and gas technologies are forecasted

Search for the decay KL0→3γK_L^0 \rightarrow 3\gamma

We performed a search for the decay $K_L^0 \rightarrow 3\gamma$ with the E391a detector at KEK. In the data accumulated in 2005, no event was observed in the signal region. Based on the assumption of $K_L^0 \rightarrow 3\gamma$ proceeding via parity-violation, we obtained the single event sensitivity to be $(3.23\pm0.14)\times10^{-8}$, and set an upper limit on the branching ratio to be $7.4\times10^{-8}$ at the 90% confidence level. This is a factor of 3.2 improvement compared to the previous results. The results of $K_L^0 \rightarrow 3\gamma$ proceeding via parity-conservation were also presented in this paper

Prognosis of fungal infection of central nervous system in HIV-infected patients: a retrospective study of 77 patients in Ukraine

Introduction: We aimed to describe the epidemiological, clinical, laboratory characteristics, and out-comes of central nervous system (CNS) mycosis in patients with human immunodeficiency virus (HIV) and to determine characteristics associated with a higher risk of death. Retrospective data from 77 case histories of HIV-infected patients with neurological symptoms caused by various fungi including Can-dida and Cryptococcus in Dnipro, Ukraine, were analysed as a case-control study with 40 deceased indi-viduals considered as cases and 37 patients with favourable outcome (survivors) considered as controls.Material and methods: Fungi in cerebrospinal fluid (CSF) were detected with traditional culture methods. Multivariate analysis used (1) binary logistic regression with survivor/dead as a dependent variable and (2) a classification and regression tree (CRT method). Results: A combination of fungal infection with other infections of CNS (dual and triple coinfec-tion) was diagnosed in most cases (n = 53, 68.8%), while the proportion of co-infection was some-what lower among survivors (59.5%). Clinical manifestations were non-specific. Risk of death was higher among those with tuberculosis (AOR = 2.7, 95% CI: 1.0-7.5) and lower among those infect-ed with Epstein-Barr virus (EBV) (AOR = 0.3, 95% CI: 0.1-1.0) and among patients on ART (AOR = 0.2, 95% CI: 0.1-0.8). Risk of death significantly decreased over time. The classification tree shows that among HIV-mycosis neurological patients not on ART with tuberculosis, the risk of death constituted 75%, while among patients on ART with EBV-infection, all patients survived.Conclusions: Opportunistic mycoses remain an important clinical challenge among immuno-compro-mised patients especially those who were diagnosed with HIV late, failed to get antiretroviral therapy, and developed tuberculosis

Experimental study of the decay KL0→π0ννˉK_L^0\to\pi^0\nu\bar{\nu}

The first dedicated search for the rare neutral-kaon decay $K_L^0\to\pi^0\nu\bar{\nu}$ has been carried out in the E391a experiment at the KEK 12-GeV proton synchrotron. The final upper limit of 2.6 $\times 10^{-8}$ at the 90% confidence level was set on the branching ratio for the decay.Comment: 23 pages, 27 figures, accepted for publication as a regular article in Physical Review

Beam pattern evolution of accreting X-ray pulsar 1A 0535+262 during its 2020 giant outburst

We report on pulse profile decomposition analysis of a bright transient X-ray pulsar 1A 0535+262 using the broadband Insight-HXMT observations during a giant outburst of the source in 2020. We show that the observed pulse profile shape can be described in terms of a combination of two symmetric single-pole contributions for wide range of energies and luminosities for a fixed geometry defining basic geometry of the pulsar. This corresponds to a slightly distorted dipole magnetic field, i.e., one pole has to be offset by $\sim 12^{\circ}$ from the antipodal position of the other pole. We reconstruct the intrinsic beam patterns of the pulsar assuming the geometry recovered from the decomposition analysis, and find evidence for a transition between "pencil" and "fan" beams in energy ranges above the cyclotron line energy which can be interpreted as transition from sub- to super-critical accretion regimes associated with onset of an accretion column. At lower energies the beam pattern appears, however, to be more complex, and contains substantial "fan" beam and an additional "pencil" beam component at all luminosities. The latter is not related to the accretion rate and is stronger in the fading phase of the outburst. We finally discuss results in context of other observational and theoretical findings earlier reported for the source in the literature.Comment: 14 pages, 8 figures. Accepted by Ap

Timing analysis of 2S 1417-624 observed with NICER and insight-HXMT

We present a study of timing properties of the accreting pulsar 2S 1417-624 observed during its 2018 outburst, based on Swift/BAT, Fermi/GBM, Insight-HXMT and NICER observations. We report a dramatic change of the pulse profiles with luminosity. The morphology of the profile in the range 0.2-10.0 keV switches from double to triple peaks at ∼ 2.5×10^(37) D^{2}_{10} erg s−1 and from triple to quadruple peaks at ∼ 7×10^{37} D^2{2}_{10} erg s−1. The profile at high energies (25-100 keV) shows significant evolutions as well. We explain this phenomenon according to existing theoretical models. We argue that the first change is related to the transition from the sub to the super-critical accretion regime, while the second to the transition of the accretion disc from the gas-dominated to the radiation pressuredominated state. Considering the spin-up as well due to the accretion torque, this interpretation allows to estimate the magnetic field self-consistently at ∼ 7 × 1012 G

Reverberation Mapping Measurements of Black Hole Masses in Six Local Seyfert Galaxies

We present the final results from a high sampling rate, multi-month, spectrophotometric reverberation mapping campaign undertaken to obtain either new or improved Hbeta reverberation lag measurements for several relatively low-luminosity AGNs. We have reliably measured thetime delay between variations in the continuum and Hbeta emission line in six local Seyfert 1 galaxies. These measurements are used to calculate the mass of the supermassive black hole at the center of each of these AGNs. We place our results in context to the most current calibration of the broad-line region (BLR) R-L relationship, where our results remove outliers and reduce the scatter at the low-luminosity end of this relationship. We also present velocity-resolved Hbeta time delay measurements for our complete sample, though the clearest velocity-resolved kinematic signatures have already been published.Comment: 52 pages (AASTeX: 29 pages of text, 8 tables, 7 figures), accepted for publication in the Astrophysical Journa