Russian Journals in the Subject Category “History” in Scopus: Key Indicators and Impact Assessment at the International Level

The article presents an analysis of Russian journals indexed in Scopus in 2021 by the category “History.” The purpose of the study was to assess the current level and influence of Russian historical journals on the basis of a comparison of their bibliometric indicators with data from journals in France and Germany. Sources and methods. The sources were the data of the Scopus international scientometric database, the SCImago Journal & Country Rank portal, the Russian Science Citation Index, and the Internet sites of journals. Conclusions and discussion. The important features of Russian journals that need to be taken into account when analyzing their bibliometric indicators are revealed: the late start of indexing in Scopus, the presence of more works from other socio-humanities, a large number of articles published annually, the affiliation of the absolute majority of historical journals to universities and research institutes, and the predominance of the journal distribution model by the type of open access. Open access to Russian journals compensates for a high percentage of publications in Russian (85.5%) and a high proportion of Russian authors (82.8%). In terms of citation indicators, Russian journals are superior to French ones and inferior to German ones. Based on the analysis of the “extreme citation” of individual Russian journals, options for correcting it are proposed. Despite the higher self-citation rate of Russian journals (40%), they have higher ratings on average, both at the national level and in comparison with historical journals in France and Germany. The question of defining the boundaries between the specializations of the journal in a closed scientific discipline, going beyond which can be assessed as artificial self-citation, is raised separately. Doubts are expressed about the possibility of a rapid reorientation of Russian journals from the European and American areas of cooperation to researchers from other regions

The 25th Anniversary of the Journal «Vestnik Volgogradskogo Gosudarstvennogo Universiteta. Seriya 4. Istoriya. Regionovedenie. Mezhdunarodnye Otnosheniya»

To the 25th anniversary of Science Journal of Volgograd State University. History. Area Studies. International Relation

MuSR method and tomographic probability representation of spin states

Muon spin rotation/relaxation/resonance (MuSR) technique for studying matter structures is considered by means of a recently introduced probability representation of quantum spin states. A relation between experimental MuSR histograms and muon spin tomograms is established. Time evolution of muonium, anomalous muonium, and a muonium-like system is studied in the tomographic representation. Entanglement phenomenon of a bipartite muon-electron system is investigated via tomographic analogues of Bell number and positive partial transpose (PPT) criterion. Reconstruction of the muon-electron spin state as well as the total spin tomography of composed system is discussed.Comment: 20 pages, 4 figures, LaTeX, submitted to Journal of Russian Laser Researc

Новые возможности анализа погрешностей при исследовании свойств эластомерных систем

Variety of graphic representations invoked by error presence in solving of singlefactor and multiple-factor tasks, important in elastomer system properties optimization, is considered hereРассмотрены, вызванные наличием погрешностей, многообразия графических изображений при решении однофакторных и многофакторных задач, актуальных при оптимизации свойств эластомерных систем

Measuring Melanoma Nanomechanical Properties in Relation to Metastatic Ability and Anti-Cancer Drug Treatment Using Scanning Ion Conductance Microscopy

A cell’s mechanical properties have been linked to cancer development, motility and metastasis and are therefore an attractive target as a universal, reliable cancer marker. For example, it has been widely published that cancer cells show a lower Young’s modulus than their non-cancerous counterparts. Furthermore, the effect of anti-cancer drugs on cellular mechanics may offer a new insight into secondary mechanisms of action and drug efficiency. Scanning ion conductance microscopy (SICM) offers a nanoscale resolution, non-contact method of nanomechanical data acquisition. In this study, we used SICM to measure the nanomechanical properties of melanoma cell lines from different stages with increasing metastatic ability. Young’s modulus changes following treatment with the anti-cancer drugs paclitaxel, cisplatin and dacarbazine were also measured, offering a novel perspective through the use of continuous scan mode SICM. We found that Young’s modulus was inversely correlated to metastatic ability in melanoma cell lines from radial growth, vertical growth and metastatic phases. However, Young’s modulus was found to be highly variable between cells and cell lines. For example, the highly metastatic cell line A375M was found to have a significantly higher Young’s modulus, and this was attributed to a higher level of F-actin. Furthermore, our data following nanomechanical changes after 24 hour anti-cancer drug treatment showed that paclitaxel and cisplatin treatment significantly increased Young’s modulus, attributed to an increase in microtubules. Treatment with dacarbazine saw a decrease in Young’s modulus with a significantly lower F-actin corrected total cell fluorescence. Our data offer a new perspective on nanomechanical changes following drug treatment, which may be an overlooked effect. This work also highlights variations in cell nanomechanical properties between previous studies, cancer cell lines and cancer types and questions the usefulness of using nanomechanics as a diagnostic or prognostic tool

Multiplexed detection of viral antigen and RNA using nanopore sensing and encoded molecular probes

We report on single-molecule nanopore sensing combined with position-encoded DNA molecular probes, with chemistry tuned to simultaneously identify various antigen proteins and multiple RNA gene fragments of SARS-CoV-2 with high sensitivity and selectivity. We show that this sensing strategy can directly detect spike (S) and nucleocapsid (N) proteins in unprocessed human saliva. Moreover, our approach enables the identification of RNA fragments from patient samples using nasal/throat swabs, enabling the identification of critical mutations such as D614G, G446S, or Y144del among viral variants. In particular, it can detect and discriminate between SARS-CoV-2 lineages of wild-type B.1.1.7 (Alpha), B.1.617.2 (Delta), and B.1.1.539 (Omicron) within a single measurement without the need for nucleic acid sequencing. The sensing strategy of the molecular probes is easily adaptable to other viral targets and diseases and can be expanded depending on the application required