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A non-stationary electrohydrodynamic model has been developed to describe the behavior of a dielectric liquid film on the electrode surface in the surrounding gas. It has been shown that the action of an inhomogeneous electric field can lead to perforation of the film with the formation of new contact lines. The field inhomogeneity was created using a round insulating insert in the center of the lower electrode. The perforation process is determined by the electric field strength, film thickness, the radius of the non-conductive insert, and the contact angle between the liquid and the solid substrate.

In the present study, the effect of operating pressure on the flame response is investigated numerically, and the validity of atmospheric tests is examined. The results show that the flame shape significantly varies at atmospheric pressure, and the flame response to imposed pressure fluctuations is changed; therefore, atmospheric test stands are not reliable enough to study the combustion instability.

This paper presents a method for determining the gas-dynamic parameters of gas flow based on nonintrusive PIV measurements of the velocity field. The wake flow past a model single nozzle of an emergency escape rocket is considered for the normal transonic (Mach number is 0.85) flight mode of a launch vehicle with a manned spacecraft. The flow around the nozzle is simulated numerically using the RANS and LES methods. The results obtained by the proposed method are compared with numerical and experimental data.

A nanoscale calculation is performed for water permeation through the cell membrane in a human body, which is 7-8 nm thick and contains densely distributed nanopores with the radii ranging between 0.2 and 0.5 nm. The pressure drop and the critical power loss on a single nanopore for initiating the wall slippage are calculated. The wall slipping velocity is found to increase significantly with reduction of the pore radius and to increase linearly with an increase in the power loss on the pore. For no wall slippage, the water mass flow rate through the pore is significantly lower than the classical hydrodynamic flow theory calculation; however, it is much greater (by three to five orders of magnitude) than the classical hydrodynamic flow theory calculation in the case where the wall slippage occurs. This water flow enhancement is heavily dependent on the power loss on the pore.

The current study focuses on the influence of thermal boundary conditions, especially for a ribbed cooling channel with two intersecting ribs. Numerical studies are carried out for the Reynolds number of 30000 under two kinds of thermal boundary conditions, i.e., the constant wall temperature condition and the uniform heat flux condition. The local normalized Nusselt number distributions and area-averaged values are compared and further analyzed. The thermal boundary type and value both affect the heat transfer performance. The uniform heat flux condition always yields higher heat transfer than the constant wall temperature condition. A correlation for the wall-to-coolant temperature ratio is obtained and compared with previously published correlations.

The two-dimensional Green-Naghdi equations are investigated in the case of an uneven bottom topography. The function which determines the topography of the bottom and may depend on time is considered. A group classification of the equations under study with respect to the function describing the bottom topography is carried out using an algebraic approach.

The publication presents the content-related characteristic of the category of «professional-pedagogical mobility». The professional-pedagogical mobility and its development is an important problem of modern education system. In modern conditions, its solving is a necessary factor for successful development of the entire domestic educational system and a key for effective usage of the social-economic potential of domestic economy. In our opinion, the professional-pedagogical mobility is a complex and multidimensional category, which, on one hand, characterizes the teacher as a person, and, on the other, as a professional in his/her field. Both aspects together are reflected in a wide range of realization of the basic and special competencies and are manifested in the form of value-semantic construct of the personality of the teacher, which is presented as an integrative personal quality, influencing the nature and dynamics of professional activities, as well as its results. The formation of professional-pedagogical mobility should be understood not as a spontaneous process, but as a systematic and purposeful movement. In our opinion, this process should include a number of interrelated stages. 1. Diagnostic stage. At this stage there should take place the diagnostics of teachers of humanities in order to check the level of professional and educational mobility. 2. Extensive stage. The basis of this stage should be the training of the teaching personnel to changing themselves, their activities as a reflexive reaction to the «perturbations» of the educational environment. 3. Intensive stage. Within the framework of this stage there should take place the study of pedagogical objects from the perspective of advancing to the heights of teaching excellence, such as the attainment of career growth. 4. Innovation stage. The fundamental direction of this area of work should be the inclusion of the teachers of humanities into the process of their own professional development. The study has examined the mechanisms and instruments of development of the professional-pedagogical mobility taking into account the specific features of professional work of the teachers of humanities of the Chair of "State and Municipal Management" in the conditions of a higher education institution.

This paper presents data on the dynamics of the ontogenetic structure of the coenopopulation of Dracocephalum imberbe Bunge, located in the tundra with Dryas oxyodontha Juz. and Kobresia simpliciuscula (Wahlenb.) Mackenz.in Republic of Tuva. Changes in the type of the ontogenetic spectrum and the density index of individuals are analyzed. It was revealed that fluctuating dynamic changes occurred during 17 years, which did not affect the type of ontogenetic spectrum and the normal distribution of ln(n + 1) density. The coenopopulation remains full-fledged. The calculated demographic indicators and indicators of the speed of development reflected a unidirectional type of dynamics towards its gradual rejuvenation.

New syntaxa are described, validation and correction of associations are carried out. New data on the distribution of various syntaxa, their ecology and floristic composition are given. Ass. Alysso tortuosi-Artemisietum salsoloidis Lysenko in Lysenko, Arkhipova et Suleymanova 2020 (Suppl. 1, Table 1, relevés 1, 2). Diagnostic species (D. s.): Artemisia salsoloides (dom.), Pimpinella tragium, Alyssum tortuosum, Matthiola fragrans. The association unites the steppe communities distributed on the chalk slopes of the Volga Upland in the Middle Volga region.

The article is dedicated to the memory of L.V. Bardunov. In 2022, the 90th anniversary from birth of the famous Russian bryologist, florist, Doctor of Biological Sciences, professor, Honored Scientist of the Russian Federation Leonid Vladimirovich Bardunov (1932-2008) was celebrated. L.V. Bardunov made a great contribution to the study of plant biodiversity in North Asia. L.V. Bardunov collected the unique herbarium specimens. Digital copies of 828 specimens collected personally by L.V. Bardunov, or together with M.G. Popov, L.I. Malyshev and other collectors, are placed in the CSBS SB RAS Digital herbarium (http://herb.csbg.nsc.ru:8081). The herbarium specimens are stored in NSK and NS herbarium collections (USU_440537). Each digitized sample is provided with a unique barcode with the acronym of the herbarium collection and a 7-digit serial number. Digitization was carried out according to the international standards at an optical resolution of 600 dpi, accompanied by a color scale and a scale ruler on ObjectScan 1600 scanners, using specialized programs ScanWizard Botany and MiVapp Botany (Microtek). The advanced search for information in the CSBG SB RAS digital herbarium is possible in 9 fields (country, administrative region, habitat, barcode of the herbarium sample, collector, family name, genus name, species name and date of collection). According to L.V. Bardunov’s herbarium specimens, several species of mosses and vascular plants were described. Vascular plants Megadenia bardunovii Popov (Brassicaceae) and Сorispermum bardunovii Popov ex Lomon. (Amaranthaceae Juss.) are named after him. The typification of the name Сorispermum bardunovii was carried out in accordance with the Articles of ICN. This publication is dedicated to the memory of L.V. Bardunov.