The limiting state of bodies during separation in the case of the general plane problem

Работа посвящена решению общей плоской задачи, связанной с определением предельного состояния тел при отрыве. Уравнения, определяющие условия предельного состояния принимаются функциями, зависящими от среднего давления и направлений отрыва. В результате вычислений были получены характеристические уравнения для двух случаев: при достижении предельных значений отрыва двумя главными напряжениями и при достижении предельного значения отрыва одним главным напряжением. Для двух рассмотренных случаев были получены уравнения характеристик и соотношения вдоль них. The work is devoted to the solution of the general plane problem related to the determination of the limiting state of bodies during separation. The equations defining the conditions for the limiting state are taken as functions that depend on the average pressure and directions of separation. As a result of calculations, the characteristic equations were determined for two cases: when the limiting values of separation by two main stresses are reached and when the limiting value of separation by one main stress is reached. For the two considered cases, equations of characteristics and relations along them were obtained.

Main directions and issues of durum winter wheat breeding under climate changing

The current paper has presented the study results (2015–2020) of the influence of changing weather conditions on durum winter wheat productivity and grain quality. The purpose of the study was to identify the main stress factors limiting durum winter wheat productivity under changing climate conditions and to determine the direction and issues for further breeding. The objects of the study were the varieties ‘Amazonka’, ‘Agat Donskoy’, ‘Kristella’, ‘Lazurit’, ‘Oniks’, ‘Diona’, ‘Eyrena’, ‘Yakhont’, ‘Kiprida’, ‘Yubilyarka’, ‘Yantarina’, ‘Uslada’, ‘Donchanka’ (a standard variety) developed by the FSBSI Agricultural Research Center “Donskoy”. There have been studied the meteorological data (average daily temperatures and precipitation) through the years of study as well. On the basis of the analysis, there have been established main stress factors of these years that affected productivity, namely drought in different vegetation periods with the pre-sowing and sowing periods in August and September of 2019; the periods ‘sprouts-tillering’ in October, December and the periods ‘tillering-stem extension’ in March, April; grain filling period in 2020; atmospheric drought during the period of active vegetation in April, June of 2018; excessive moisture with rainfalls and squally winds that caused lodging, diseases, grain flowing off and discoloration in 2014–2015, 2015–2016. The agricultural year 2016–2017 was the most favorable in terms of temperature regime, precipitation and their distribution (at the level of the long-term average), with an average varietal productivity of 9.49 t/ha. Yield decrease depending on this or that stress factor (in comparison with the favorable year of 2017) was on 54.5% in 2019, 32.5% in 2020 and on 21.4 in 2015 and 27.2% in 2016. The exception was the year of 2018, when with sufficient soil moisture, productivity was on 26.3% more than in 2017. Due to the study results of winter durum wheat varieties according to their traits and properties to the indicated stress factors in 2015–2020, there have been identified the issues for each direction, the solution of which will be aimed at developing stress-resistant, resistant to lodging and diseases varieties with large stable yields and high grain quality.

Effect of Intraoperative Propofol-Induced Sedation on the Neurotransmitter Levels (Pilot Study)

The aim of the study was to determine the changes in the levels of various neurotransmitters depending on the depth of propofol-induced sedation.Material and methods. Twenty-four patients were included in a prospective, simple blinded study. All patients underwent elective orthopedic intervention with subarachnoid anesthesia and moderate (group 1, n=12) or deep (group 2, n=12) propofol-induced sedation. Peripheral blood sampling for measurement of neurotransmitter levels was performed before regional blockade (Stage 1), 35–40 min after the start of sedation (Stage 2), and 10–15 min after sedation was terminated and consciousness was recovered (Stage 3).Results. Deep propofol-induced sedation resulted in a decrease in norepinephrine level at stages 2 and 3. Under moderate sedation, its level decreased at Stage 2 and returned to baseline after restoration of consciousness. The initial concentration of norepinephrine (Stage 1) was higher in Group 2.Conclusion. Propofol-induced sedation resulted in reduced level of the main stress hormone, which suggests its stabilizing effect on autonomic nervous system.

Language and Culture Interconnectedness

Numerous criticism directed at the Sapir-Whorf Hypothesis called forth the viewing of the hypothesis through the prism of language and culture interconnection and check to what extent the linguistic determinism is an applicable and useful tool in foreign language studies. For this reason, the present paper carries out a discussion to construct a somewhat modified version of the linguistic determinism idea by adding to the language–culture unit a third element such as expressiveness. To make the proposed here version of linguistic determinism comprehensible, it has been decided to describe and explain the notions of language, culture, and expressiveness to make them clear and digestible for the purpose of the present discussion. In the course of the discussion, strengthened by quotations from the literature, the main stress is put on the language-culture interconnectedness viewed as the key element determining successful language studies, especially in the foreign languages domain. Finally, the attention is directed at the role of creativity and expressiveness as factors responsible for the level of the language user’s competence, which, in turn, is viewed as creative communicative competence.

Translation Program and “Philosophy” Series

The review presents the main translations of the classics of philosophical literature in previous years. The publication was made in cooperation with the Mizhvukhamy Foundation and the Tempora Publishing House. The main stress of the review is made on the works of Emanuele Severino, Ibn Sina, Henry David Thoreau and Edmund Husserl.

Experimental Study on Percolation Rate Characteristics of Gas-Filled Coal Bodies Based on True Triaxial Condition

To research the percolation rate of gas-filled coal based on true triaxial condition, this paper uses the three-phase coupling true triaxial servo test device to carry out the seepage test of coal, and the percolation rate of coal under different conditions of three factors such as gas pressure was measured by Darcy’s law, and the variation of percolation rate of coal was studied based on the comprehensive consideration of thermal elastic swelling deformation, expansion deformation of adsorbed gas, and compression deformation of interstitial pressure. The results are as follows: (1) When the main stress and temperature maintain unchanged, the percolation rate presents the trend which first decreases and then becomes gentle with the gas pressure; when the gas pressure and main stress maintain unchanged, the percolation rate increases with the decrease of temperature; when the pressure and temperature maintain unchanged, the changes of percolation rate present a shape of “V” with the main stress. (2) The strain curve of gas-filled coal decreases at first and then increases; that is, the percolation rate decreases gradually when the strain increases at the compression phase and elastic phase, while the percolation rate increases with the increase of strain at the yield phase and failure phase. (3) In the process of increasing volume stress, the percolation rate decreases gradually in the pore compaction stage, the percolation rate increases gradually from crack propagation to peak failure stage, and then, the percolation rate increases significantly after the peak damage. According to the test results, the percolation rate and volume strain show an inverse proportion.

Adaptation assessment of drought tolerance in maize populations from the Sahara in both shores of the Mediterranean Sea

Drought is the main stress for agriculture, and maize (Zea mays L.) germplasm from the Sahara has been identified as potential source of drought tolerance; however, information about adaptation of semitropical maize germplasm from the Sahara to temperate areas has not been reported. Our objective was assessing the adaptation of maize germplasm from Saharan oases as sources of drought tolerance for improving yield and biomass production under drought conditions in temperate environments. A collection of maize populations from Saharan oases was evaluated under drought and control conditions in Spain and Algeria. Algerian populations were significantly different under drought for most traits, and the significant genotype × environment interactions indicated that drought tolerance is genotype-dependent, but tolerance differences among genotypes change across environments. Based on yield, the Algerian maize populations PI527474, PI527478, PI527472, PI527467, PI527470, and PI527473 would be appropriate sources of drought tolerance for temperate environments. Concerning biomass production, the most interesting populations were PI527467, PI542685, PI527478, and PI527472. These Saharan populations could provide favorable alleles for drought tolerance for temperate breeding programs, and could also be used for studying mechanisms and genetic regulation of drought tolerance.

Investigation research on the demand of pre-job training for nursing students in higher vocational colleges

Objectives: To investigate the pre-job training demand of nursing students in higher vocational colleges, lay a foundation for the development of scientific and standardized pre-job training program and help nursing students smoothly transition to clinical practice state from student status. Methods: A self-designed questionnaire was used to investigate 822 nursing students of grade 2018 in our school from four aspects: the necessity of pre-job training, the demand content of pre-job training, the demand of skill enhancement program, and the stress source of pre-internship. Results: Demand rate of the pre-job training of nursing students in the college was 99.5%, and main demand of the training content were nursing skill training (96.8%), nursing safety and occupational protection (95.1%), nursing theory training (92.9%); the main demand of nursing skills enhancement program were closed intravenous infusion (90.3%), (intradermal, subcutaneous, intramuscular) injection (87.8%), cardiopulmonary resuscitation (81.8%), and indwelling catheterization (77.5%); the main stress sources of pre-internship was lack of confidence in theory and skills, accounts for 61.1% in total 760 students. Conclusion: The pre-job training courses in higher vocational colleges should be close to the clinical needs of students, it is necessary to carry out pre-job training courses according to main demand of the training content, the main demand of nursing skills enhancement program and the main stress sources of pre-internship in the college; this article may provide reference for our school and other vocational colleges to develop pre-job training program.

Translation Technology in English Studies Within the System of Higher Education in Poland

The study is focused on translation technology within the system of higher education in Poland, specifically English Studies offering translation specialization at BA and MA level, as well as postgraduate studies aimed at translators of English. The conducted analysis of translation curricula of Polish universities investigates the presence of courses devoted to the use of translation technology and seeks to determine whether such courses are offered at a given level of higher education, where in the system most of the courses are placed, and when they are mostly organized. First, however, a brief overview of different aspects determining the inclusion of translation technology in curricula are discussed. Here, the main stress is placed on its importance for the translation markets, the skills and knowledge obtained by students entering the market which are desired by translation agencies, elements affecting the selection of given translation software, the necessary infrastructure to run such courses, the costs of the programmes, ‘human resources’, the policies of universities, etc. The short discussion is followed by an analysis of the available courses, with each section devoted to one of the levels of the Polish higher education system, namely BA, MA and postgraduate studies. The courses within each level are briefly compared to provide some general tendencies for each type of studies. The final, concluding part of the study summarizes the results and stresses the need for further introduction of translation technology into translation curricula.

Online Learning with the Eyes of Teachers and Students in Educational Institutions of Ukraine

The article presents an analysis of the attitude of teachers and students, colleges and universities to distance learning during the 2020 in Ukraine. The factors of the success of online learning were analyzed. The main stress factors were identified. Analysis of the results of the dynamics of opinions led to some conclusions and recommendations: for teachers regarding self-development; for school administrations regarding technical, organizational, and moral support for all participants in the educational process; for universities that provide professional training for future teachers.