Mirror instability in a plasma with cold gyrating dust particles

In this work linear stability analysis of a magnetized dusty plasma with an anisotropic dust component having transversal motions much stronger than motions parallel to the external magnetic field, and isotropic light plasma components is described. Such a situation presumably establishes in a shock compressed space dusty plasma downstream the shock front. Oblique low-frequency magneto-hydrodynamic waves ($\omega\ll \omega_{cd}$, $\omega_{cd}$ being the dust cyclotron frequency) are shown to be undergone to the mirror instability. Consequences for nonthermal dust destruction behind shock fronts in the interstellar medium are discussed.Comment: 13 pages, 5 figs, accepted to Phys. Pasma

Molecular epidemiology of serogroup a meningitis in Moscow, 1969 to 1997.

Molecular analysis of 103 serogroup A Neisseria meningitidis strains isolated in Moscow from 1969 to 1997 showed that four independent clonal groupings were responsible for successive waves of meningococcal disease. An epidemic from 1969 to the mid-1970s was caused by genocloud 2 of subgroup III, possibly imported from China. Subsequent endemic disease through the early 1990s was caused by subgroup X and then by subgroup VI, which has also caused endemic disease elsewhere in eastern Europe. A 1996 epidemic was part of the pandemic spread from Asia of genocloud 8 of subgroup III. Recent genocloud 8 epidemic disease in Moscow may represent an early warning for spread of these bacteria to other countries in Europe

SALIVARY THE LEVEL OF PROINFLAMMATORY CYTOKINES IN CHILDREN WITH AUTOIMMUNE DIABETES MELLITUS IN DIFFERENT PHASES OF COMPENSATION ENDOCRINOPATHY

Aim. To assess the dynamics of the level of proinflammatory cytokines and their receptors in mixed saliva in patients with autoimmune diabetes mellitus during the period of the occlusal occlusion at various stages of disease compensation and to determine the possibility of applying these values in the early diagnosis and control of the effectiveness of endocrinopathy.Materials and methods. The material of laboratory-diagnostic and clinical studies was the results of examination of 93 children during the period of the change of occlusion, which were divided into two groups. The comparison group consisted of children without endocrine pathology. The main group consisted of children diagnosed with type 1 diabetes mellitus, which were divided into two subgroups depending on the degree of endocrinopathy compensation. The level of pro-inflammatory cytokines and their receptors in the unstimulated oral liquid was carried out by the solid-phase enzyme-linked immunosorbent assay using the «Vector-Best»» and «Cytokine» reagent kits.Results. With the compensated form of autoimmune diabetes mellitus, there is an overregulation of regulatory mechanisms with an imbalance in the level of soluble receptors initiating the realization of the proinflammatory properties of these cytokines. The decompensated form of autoimmune diabetes is caused by an absolute increase in virtually all pro-inflammatory cytokines in the oral fluid, with an even more pronounced imbalance in their soluble receptors.Conclusion. In parallel with the therapeutic measures concerning the underlying disease in children with autoimmune diabetes mellitus the expediency of conducting a comprehensive dental examination with subsequent medical observation of doctors of a stomatology profile. In connection with a direct correlation be-tween the degree of activity of caries process and increase the severity of endocrinopathy, treatment and preventive measures in children with autoimmune diabetes should be regularly monitored and conducted with utmost care

Substantiation of Proposals on Improvement of Normative and Legal Regulation in the Field of Pathogenic Biological Agents Handling in the Russian Federation

Presented are the results of assessment of the national regulatory framework in the field of pathogenic biological agents handling in comparison with the same foreign one and WHO recommendations. Shown is the necessity of timely introduction of amendments or revision of the national regulatory documents. The topical issues requiring decision are specified. The proposals on improvement of normative legal regulations are submitted. The development of the common regulatory document integrating the issues of biological safety provision seems to be advisable

Tunable Mid-Infrared Laser Sources for Trace-Gas Analysis

We demonstrate advanced experimental approaches to photoacoustic gas detection with tunable mid-infrared (mid-IR) laser sources of different types. A gas analyzer for registration of various gas components based on a tunable narrow-linewidth optical parametric oscillator (OPO) was designed and investigated. Using this OPO, the possibility of measuring the trace concentration (~2÷3 ppm) of methane (CH4) in air was experimentally shown. The gas detection capability was enhanced by introducing injection seeding into the OPO. Another gas analyzer was based on a quantum cascade laser (tunable within the range ~7.6 ÷7.7 μm) and a resonant differential photoacoustic detector. Detection of the ultra-low concentration (~0.3 ppm) of methane in air was achieved (the standard dispersion was (1σ) ≈ (10–11) ppb with an integration time of 10 s). We compare the presented approaches and outline their further development. © 2021 Institute of Physics Publishing. All rights reserved.This work was partially supported by the Ministry of Science and Higher Education of the Russian Federation (grant FSUS-2020-0036). The Fan-out MgO: PPLN chip was prepared by A.A. and V.S with support from Russian Foundation for Basic Research (grant RFBR-mk-18-29-20077). The CH4 spectroscopic experiments were funded by RFBR, project number 19-32-60055

Identification of Single- and Multiple-Class Specific Signature Genes from Gene Expression Profiles by Group Marker Index

Informative genes from microarray data can be used to construct prediction model and investigate biological mechanisms. Differentially expressed genes, the main targets of most gene selection methods, can be classified as single- and multiple-class specific signature genes. Here, we present a novel gene selection algorithm based on a Group Marker Index (GMI), which is intuitive, of low-computational complexity, and efficient in identification of both types of genes. Most gene selection methods identify only single-class specific signature genes and cannot identify multiple-class specific signature genes easily. Our algorithm can detect de novo certain conditions of multiple-class specificity of a gene and makes use of a novel non-parametric indicator to assess the discrimination ability between classes. Our method is effective even when the sample size is small as well as when the class sizes are significantly different. To compare the effectiveness and robustness we formulate an intuitive template-based method and use four well-known datasets. We demonstrate that our algorithm outperforms the template-based method in difficult cases with unbalanced distribution. Moreover, the multiple-class specific genes are good biomarkers and play important roles in biological pathways. Our literature survey supports that the proposed method identifies unique multiple-class specific marker genes (not reported earlier to be related to cancer) in the Central Nervous System data. It also discovers unique biomarkers indicating the intrinsic difference between subtypes of lung cancer. We also associate the pathway information with the multiple-class specific signature genes and cross-reference to published studies. We find that the identified genes participate in the pathways directly involved in cancer development in leukemia data. Our method gives a promising way to find genes that can involve in pathways of multiple diseases and hence opens up the possibility of using an existing drug on other diseases as well as designing a single drug for multiple diseases

Construction of a guaranteed control policy for a linear system with disturbances

Рассматриваются линейные динамические системы с помехами (возмущениями). Для данных систем решается задача построения оптимальной гарантированной политики управления, которую в процессе управления системой разрешается корректировать в заданные моменты времени. Предлагаемая политика управления гарантирует, что для всех допустимых возмущений значение критерия качества не превосходит заранее вычисленного значения, аппроксимирующего оптимальное значение критерия качества.Linear dynamic systems in the presence of disturbances are considered. Problem of constructing optimal guaranteed control policy for these systems is solved. Optimal control policy is allowed to be corrected at the given time moments during a control process. Available control policy guarantees that for all admissible disturbances, cost functional does not exceed a calculated beforehand value that approximates the optimal value

Scientific author names:Errors, corrections, and identity profiles

Authorship problems are deep-rooted in the field of science communication. Some of these relate to lack of specific journal instructions. For decades, experts in journal editing and publishing have been exploring the authorship criteria and contributions deserving either co-authorship or acknowledgment. The issue of inconsistencies of listing and abbreviating author names has come to the fore lately. There are reports on the difficulties of figuring out Chinese surnames and given names of South Indians in scholarly articles. However, it seems that problems with correct listing and abbreviating author names are global. This article presents an example of swapping second (father’s) name with surname in a ‘predatory’ journal, where numerous instances of incorrectly identifying and crediting authors passed unnoticed for the journal editors, and no correction has been published. Possible solutions are discussed in relation to identifying author profiles and adjusting editorial policies to the emerging problems. Correcting mistakes with author names post-publication and integrating with the Open Researcher and Contributor ID (ORCID) platform are among them