Spin excitations of the correlated semiconductor FeSi probed by THz radiation

By direct measurements of the complex optical conductivity $\sigma(\nu)$ of FeSi we have discovered a broad absorption peak centered at frequency $\nu_{0}(4.2 K) \approx 32 cm^{-1}$ that develops at temperatures below 20 K. This feature is caused by spin-polaronic states formed in the middle of the gap in the electronic density of states. We observe the spin excitations between the electronic levels split by the exchange field of $H_{e}=34\pm 6 T$. Spin fluctuations are identified as the main factor determining the formation of the spin polarons and the rich magnetic phase diagram of FeSi.Comment: 5 pages, 4 figure

Effect of acoustic wave on the parametric X-ray generation by relativistic electrons in a crystal

An exhaustive description of the parametric X-ray (PXR) generation by relativistic electrons in a crystal excited by an acoustic wave is proposed. A principal question as to whether it is possible to enhance the PXR yield under these conditions is consideredyesBelgorod State Universit

Acoustic wave controlled X-ray diffraction and emission processes in crystals

Possibilities to exert control over electromagnetic processes in a crystal by an acoustic wave are considered. The influence of such a wave on the parametric X-ray radiation and coherent bremsstrahlung from relativistic electrons in a crystal are studied in this paper

The Image of a Hero in Western and Russian Social Advertising

The article is devoted to a comparative study of the image of a hero / superhero in Russian and Western social advertising. The relevance of the study is determined by the contrast of globalization processes, on the one hand, and the desire to preserve nationally oriented values, on the other. The novelty of the study lies in comparing the ideological and linguocultural representations of the image of the hero / superhero, reflected in the socio-advertising text. The results of the study are based on a contextual analysis of the geroy and hero tokens, supergeroy and superhero , as well as non-verbal symbols associated with these concepts presented in the structure of creolized advertising text. In the structure of the image of the hero / superhero, both semantic components (for example, a military metaphor) and specific representations that are determined by the cultural code and ideological identifications, are revealed that are common for Russian and Western social advertising. It is proved that those components of the hero’s image that are connected with the axiology of culture (“peaceful heroism” interpreted as socially approved behavior in general) are more likely to have positive connotations than those that are due to ideological ideas. It is concluded that the image of a superhero in Russian linguistic culture, on the one hand, is understandable and even already familiar, on the other hand, it is rejected as a representative of an alien culture and ideology

SOME ASPECTS OF EFFECTIVENESS AND SAFETY OF ANTIBACTERIAL DRUGS IN PREGNANCY

Analysis of published data on clinical effectiveness and safety of antimicrobial drugs indicates that original and generic antibacterial medicines sometimes significantly differ in the therapeutic equivalence and in the frequency and severity of side effects

Integrative Analysis of Predictors for Unfavorable Course of Parkinson Disease According to Medical Care Assessment: Cohort Retrospective Study

Background. Parkinson's disease is a neurodegenerative disorder that leads to severe disability, especially in its advanced stages. Medical care should be performed in accordance with modern clinical recommendations and standards. Assessment of the quality of medical care in the Russian Federation is carried out via examination of medical documentation by insurance experts regarding compliance with Russian standards and other regulatory documents.Objective. To study the predictors for unfavorable course of Parkinson's disease based on routine examinations of the quality of medical care.Methods. The cohort retrospective study included 7,264 examinations of the medical care quality of 1,754 patients with Parkinson's disease for the period from 2011 to 2018 in the Russian Federation. The study focused on two indicators: presence/absence of disease progression and determination/aggravation of a degree of disability or maintenance of the previous social and professional activity. The obtained data were used to develop diagnostic tables with prognostic factors of Parkinson's disease according to A. Wald. Statistical analysis of the results was carried out using Statistica 13 (StatSoft, USA). Results. Diagnostic tables have been developed to determine the prognostic factors affecting the progression of Parkinson's disease and, accordingly, decreasing the degree of social and/ or professional activity and to assess the diagnostic factors when the risk of the disease aggravation will be more than 95%.Conclusion. The greatest progression of Parkinson's disease (p < 0.05) was observed in the cases of poor collection of complaints, history and clinical evaluation of the patient's condition, inadequate prescription or absence of prescription of levodopa when indicated, as well as defects in the correction of additional disorders. The likelihood of social disadaptation in patients with Parkinson's disease (p < 0.05) was found to be greater in the cases of poor collection of complaints and history, neurological examination and clinical evaluation of the patient's condition as well as inadequate prescription or absence of prescription of levodopa when indicated