The Statement of Design and Application Questions for the Gyroscope with a Gas-dynamic Suspension of Ball Rotor in the Navigation Support Drilling System

The general issues of creation the inertial navigation system are considered. Analysis of the possible implementation of the gyroscope with a gas-dynamic suspension of ball rotor for using it as a sensor in the information and measuring complex is provided. The permissible layout construction is proposed. The software system variants for the mathematical modelling of the main gas-dynamic bearing characteristics are considered. Mathematical modelling is essential to extend and optimize the design parameters of the developed gyroscopic construction. Some results of modelling, theoretical evaluation and preliminary experimental studies are summarized

X-Ray Structural Study of 09Nn2Si Steel Welded Joints

The article is devoted to handling a vital scientific and technical problem of improving operational reliability and safety of critical constructions, exploited in Siberia and Far North, by developing of new technological approaches to welding. In the article results of X-ray diffraction examinations of 09Mn2Si steel welded joints are given, produced by different welding operations. Resulting from researches, the authors have concluded that pulse-arc welding is the most preferred welding process as compared with direct current welding

Edge Effect: Growth and Morphogenetic Features of Scots Pine Trees in Forest Parks and Natural Stands

The degree of development and depth of edge effect are studied in some fragments of forest-park stands under long-term urbanization impact (in the city of Yekaterinburg, Russia) and in natural forests using the method of transect investigation. The method of quantitative assessment of tree stem and crown growth features by a set of morphological characteristics was used. The objects of the research included the edges of Scots pine stands. The edge effect was determined by two of the five studied characteristics: foliation and branchiness, which characterize the level of the development of the tree assimilation apparatus. The general trends indicate an increase in the development of these characters in natural stands and decrease in the forest park at increased distance from the edge. The nonlinear development of morphological characteristics along the transects is due to different types of tree responses on the impact of determining morphogenesis factors. Four statistically significant different zones were identified in the natural stands at distances of 0-75, 100-125, 150-175, and 200-225 m from the forest edge and only two zones were differentiated in the forest park. The unified approach to data analysis suggests the edge effect in both habitats at a distance of 75-100 m from the forest edge according to branchiness and 100-125 m according to foliation. Several types of morphogenetic tree responses, distinguished by the degree of foliation and branchiness variation under edge effect impact, are revealed.This study was supported by the Integrated Program of the Ural Branch of the Russian Academy of Sciences for 2018-2020 (grant no. 18-4-4-10) and performed under the State Assignment of the Botanical Garden, Ural Branch, Russian Academy of Sciences

Dynamics of Branch and Stem Apical Growth in the Progenies of Plus Pine Trees (Pinus sylvestris L.)

The relationship between the characteristics of the linear growth of branches and stems was studied, as well as the possibility of distinguishing between various Scots pine (Pinus sylvestris L.) genotypes. The objects of research were experimental plantations of the half-sib progenies of pine plus trees aged 10–11 years. The annual increments of the stem and differently oriented branches were measured. Correlation, regression and data analysis methods developed by the authors were used. The time dynamics of the obtained values were studied by comparing the regression line slopes describing the interrelation of axial increments and by analysis of the frequency spectra of the Integral Parameter of Characters Sequence applied earlier. The analysisof the obtained results has shown the existence of a significant relationship between auxiblast linear growth within the two adjacent years and a weak interrelation of the characteristics of branch and stem morphogenesis. The possibility of distinguishing Scots pine half-sib families by comparing the dynamics of branches and stem apical growth is described. Keywords: Scots pine, apical growth of branches and stems, genotypic and phenotypic variability, impact of environmental factors on growth, morphogenesis of woody plants, growth modelin

Aggregate ranking of the world's leading universities

The paper presents a methodology for calculating the aggregate global university ranking (Aggregated Global University Ranking, or AGUR), which consists of an automated presentation of the comparable lists of names for different universities from particular global university rankings and a simple procedure of aggregating particular global university rankingsyesBelgorod State Universit

Construction IF-scoring rule within the framework of new generation of metric citations

Basing on the scoring rule approach, there was designed a citation metrics, allowing for not only the number of author’s articles published and their citations but also the impact factors of journals in which the articles were published as well as the impact factors of journals with articles citing the autho

Methodology for failure analysis of complex technical systems and prevention of their consequences

The paper presents a study on the methodology of failures and their possible consequences analysis. Analysis of failures and their consequences is carried out for newly developed or modernized products and it is one of main activities in the reliability assurance system. The methodology is applied to the analysis of all designed systems, starting from the earliest stage of development, in order to evaluate the approach to development and compare the advantages of the design solution. The considered analysis of failures and their consequences of components is a part of the complex analysis of reliability of the whole product. Depending on the complexity of the design and the available data, a particular approach may be chosen for the analysis. In one case, it is a structural approach, in which a list of individual elements and their possible failures is compiled. In another case, it is the functional approach, which is based on the statement that each element must perform a number of functions that can be classified as solutions. The results provide a scheme for conducting the analysis and finding solutions to prevent them. The conclusions say that the level of detail determines the level at which failures are postulated

Finding of the lesser flying squid (Todaropsis eblanae, oegopsida, ommastrephidae) from the Barents Sea

A specimen of the squid Todaropsis eblanae (Ball 1841) was caught in the Barents Sea by a pelagic trawl for the first time (71°13'N-36°38'E, 0-60-m trawling horizon, at a depth of 225 m). The maturing squid male caught had 29 spermatophores in spermatophoric sac, dorsal mande of 92 mm long, and body weight of 67.3 g. Obviously, this specimen has come here from the North Sea along the eastern branch of the Norwegian current and southern branch of the Nordcap current