Fuzzy-Logical model for analysis of sustainable development of fuel and energy complex enterprises

The purpose of this article is to build a mathematical model for analyzing the sustainability of the development of an enterprise in the fuel and energy complex, integrated into an information management syste

Magnetization of manganite thin films on ferroelectric substrates

© 2016 Elsevier B.V.Here we report the magnetic susceptibility measurements of magnetron sputtered orthorhombic manganite RMnO3 (R=Yb, Gd) thin films deposited on dielectric LaAlO3 and ferroelectric SrTiO3, LiNbO3 substrates. We observed that all of investigated o-RMnO3 films show a splitting in the temperature dependence of ZFC and FC magnetization curves. We found that the substrate can impact on the splitting temperature ZFC-FC curves and absolute value of the magnetization of thin films

Assessment of the clinical status and behavioral risk factors in patients with cardiovascular and other noncommunicable diseases in Russia and neighboring countries during quarantine and self-isolation

Aim. To carry out a comparative assessment of the clinical status and behavioral risk factors in patients with cardiovascular (CVD) and other noncommunicable diseases (NCDs) in Russia and neighboring countries during quarantine and selfisolation in the context of coronavirus disease 2019 (COVID-19) pandemic.Material and methods. The study involved patients from Russia, Azerbaijan, Kazakhstan, Lithuania, Kyrgyzstan. A total of 351 men and women aged 30- 69 years with one or more NCDs were included, including hypertension (HTN), coronary artery disease with or without myocardial infarction, type 2 diabetes, chronic obstructive pulmonary disease/ asthma, and cancer that were in quarantine self-isolation. To assess the clinical status and risk factors, patients underwent a questionnaire and examination. The changes in health status was assessed using the EQ-5D questionnaire.Results. During self-isolation and quarantine, 40% of patients noted a decrease and limitation of physical activity. An increase in food frequency and amount was registered in 35% of individuals. During quarantine, every third patient with HTN had hypertensive crises, and every fifth increased the doses of the drugs taken. In the examined cohort, exertional angina (30%) took second place among NCDs. In the group of Azerbaijan patients, every second had exertional angina, while in the Russian cohort — 33%, and in the Lithuanian group — every fourth patient. In general, health status deterioration among people with angina was noted in 6% of cases. In the examined group, type 2 diabetes was detected in 25% of cases. During quarantine, changes in hypoglycemic therapy were carried out in an average of 34% of patients. COVID-19 was registered in 22% of patients in the examined cohort. The largest number was found in the group from Kazakhstan — 57%, while the second place was taken by the Azerbaijan group — 40%. General condition deterioration was detected in 55% of cases in groups from Azerbaijan and Kazakhstan. In Russia, this was reported by 28,8% of patients, while in the group from Lithuania, every fourth patient noted a worsening of the health status. The lowest deterioration was registered in the Kyrgyzstan group (14%).Conclusion. During quarantine and self-isolation among patients with NCDs, a decrease in physical activity, an increase in food consumption and smoking was noted. There was health status deterioration in patients with various NCDs, primarily with CVDs, which required therapy changes. Taken together, this was reflected in general condition worsening in patients with chronic NCDs. It is obvious that the development of comprehensive preventive measures in conditions of selfisolation and quarantine is required

Nature of the Dirac gap modulation and surface magnetic interaction in axion antiferromagnetic topological insulator MnBi2Te4A

Modification of the gap at the Dirac point (DP) in axion antiferromagnetic topological insulator MnBi2Te4 and its electronic and spin structure have been studied by angle- and spin-resolved photoemission spectroscopy (ARPES) under laser excitation at various temperatures (9-35 K), light polarizations and photon energies. We have distinguished both large (60-70 meV) and reduced (< 20 meV) gaps at the DP in the ARPES dispersions, which remain open above the Neel temperature (T-N = 24.5 K). We propose that the gap above T-N remains open due to a short-range magnetic field generated by chiral spin fluctuations. Spin-resolved ARPES, XMCD and circular dichroism ARPES measurements show a surface ferromagnetic ordering for the "large gap" sample and apparently significantly reduced effective magnetic moment for the "reduced gap" sample. These observations can be explained by a shift of the Dirac cone (DC) state localization towards the second Mn layer due to structural disturbance and surface relaxation effects, where DC state is influenced by compensated opposite magnetic moments. As we have shown by means of ab-initio calculations surface structural modification can result in a significant modulation of the DP gap.The authors acknowledge support by the Saint Petersburg State University (Grant No. 51126254), Russian Science Foundation (Grant No. 18-12-00062 in part of the photoemission measurements and Grant No. 18-12-00169 in part of the electronic band structure calculations) and by Russian Foundation of Basic Researches (Grants Nos. 18-52-06009 and 20-32-70179) and Science Development Foundation under the President of the Republic of Azerbaijan (Grant No. EI F-BGM-4-RFTF1/2017-21/04/1-M-02). A. Kimura was financially supported by KAKENHI (Grants No. 17H06138, No. 17H06152, and No. 18H03683). S.V.E. and E.V.C. acknowledge support by the Fundamental Research Program of the State Academies of Sciences (line of research III.23.2.9). The authors kindly acknowledge the HiSOR staff and A. Harasawa at ISSP for technical support and help with the experiment. The ARPES measurements at HiSOR were performed with the approval of the Proposal Assessing Committee (Proposal Numbers: 18BG027 and 19AG048). XAS and XMCD measurements were performed at BL23SU of SPring-8 (Proposal Nos. 2018A3842 and 2018B3842) under the Shared Use Program of JAEA Facilities (Proposal Nos. 2018A-E25 and 2018B-E24) with the approval of Nanotechnology Platform project supported by MEXT, Japan (Proposal Nos. A-18-AE-0020 and A-18-AE-0042). M. M. Otrokov acknowledges the support by Spanish Ministerio de Ciencia e Innovacion (Grant no. PID2019-103910GB-I00). K. Yaji was financially supported by KAKENHI (Grants No. 18K03484)

Precise tracking of vaccine-responding T-cell clones reveals convergent and personalized response in identical twins

T-cell receptor (TCR) repertoire data contain information about infections that could be used in disease diagnostics and vaccine development, but extracting that information remains a major challenge. Here we developed a statistical framework to detect TCR clone proliferation and contraction from longitudinal repertoire data. We applied this framework to data from three pairs of identical twins immunized with the yellow fever vaccine. We identified 500-1500 responding TCRs in each donor and validated them using three independent assays. While the responding TCRs were mostly private, albeit with higher overlap between twins, they could be well predicted using a classifier based on sequence similarity. Our method can also be applied to samples obtained post-infection, making it suitable for systematic discovery of new infection-specific TCRs in the clinic

Nature of the Dirac gap modulation and surface magnetic interaction in axion antiferromagnetic topological insulator MnBi2_2Te4_4

Modification of the gap at the Dirac point (DP) in antiferromagnetic (AFM) axion topological insulator MnBi$_2$Te$_4$ and its electronic and spin structure has been studied by angle- and spin-resolved photoemission spectroscopy (ARPES) under laser excitation with variation of temperature (9-35~K), light polarization and photon energy. We have distinguished both a large (62-67~meV) and a reduced (15-18~meV) gap at the DP in the ARPES dispersions, which remains open above the N\'eel temperature ($T_\mathrm{N}=24.5$~K). We propose that the gap above $T_\mathrm{N}$ remains open due to short-range magnetic field generated by chiral spin fluctuations. Spin-resolved ARPES, XMCD and circular dichroism ARPES measurements show a surface ferromagnetic ordering for large-gap sample and significantly reduced effective magnetic moment for the reduced-gap sample. These effects can be associated with a shift of the topological DC state towards the second Mn layer due to structural defects and mechanical disturbance, where it is influenced by a compensated effect of opposite magnetic moments