Pleistocene hares from the East Siberian Arctic (Lagomorpha, Leporidae)

Isolated fossil hare bones from seven Pleistocene localities in the east Siberian Arctic are attributed to Lepus tanaiticus vereschagini Averianov, 1995 (Mamontovaya Khayata) and to L. tanaiticus subsp. indet. (other localities)

Sol-gel synthesis of fluorescent materials based on barium aluminate

Barium aluminate was obtained by sol-gel method. We used a heat treatment in an oven at 130°C, and microwave radiation for drying the gel. To obtain a crystalline product all samples were calcined in the muffle furnace at the temperatures up to 1100°C. Complex studies were used to identify the dynamics of phase and structural transformations in the synthesis of barium aluminate. The main stages of formation BaAl2O4 were determined by thermal analysis; evolution of phase composition and crystal structure were studied using X-ray diffraction and IR-spectroscopy. The morphology of surface of the barium aluminate was investigated by scanning electron microscope. In the work fluorescent material with composition Ba1-xEuxAl2O4 was obtained. The maximum of luminescent intensity is achieved with content of Eu3+ equal 0.75 mol in the case of processing of gel by microwaves. The phosphor obtained by heat treatment in an oven gel has a composition Ba0.9Eu0.1Al2O4

Sol-gel synthesis of fluorescent materials based on barium aluminate

Barium aluminate was obtained by sol-gel method. We used a heat treatment in an oven at 130°C, and microwave radiation for drying the gel. To obtain a crystalline product all samples were calcined in the muffle furnace at the temperatures up to 1100°C. Complex studies were used to identify the dynamics of phase and structural transformations in the synthesis of barium aluminate. The main stages of formation BaAl2O4 were determined by thermal analysis; evolution of phase composition and crystal structure were studied using X-ray diffraction and IR-spectroscopy. The morphology of surface of the barium aluminate was investigated by scanning electron microscope. In the work fluorescent material with composition Ba1-xEuxAl2O4 was obtained. The maximum of luminescent intensity is achieved with content of Eu3+ equal 0.75 mol in the case of processing of gel by microwaves. The phosphor obtained by heat treatment in an oven gel has a composition Ba0.9Eu0.1Al2O4

Features of geological structure and formation of oil & gas deposits in the Vuktyl thrust fault region

The paper is devoted to modeling of the processes of oil and gas deposits formation of the Vuktyl thrust development area, to which the largest in the Timan-Pechora oil and gas province is associated with the same oil and gas condensate deposit. Oil and gas of deeply buried formations of the autochthon of the overthrust region remains poorly studied. Therefore, application of modern methods of basin modeling is relevant for oil and gas content estimation. In order to simulate the section, Schlumberger PetroMod software package was used. The package allows to determine the history of generation of hydrocarbons on the geological time scale, migration paths, amount and type of oil and gas accumulations in both surface and reservoir conditions. Using the 1D and 2D modeling of the Vuktylskaya-58 parametric well and the overthrust region models were obtained. The models reflect the modern geological section, its evolution during the geological time. The processes of formation of oil and gas were studied. As a result, it was shown that the parent rocks of the allochthonous section part could not participate in the formation of the main gas-condensate deposit of the Vuktyl deposit because they entered only the main oil formation zone. In deeply buried deposits of the autochthon starting from the Permian and Triassic formation of the Vuktylsky gas-condensate field and possibly the deposits in poorly studied deep formations could be caused by processes of generation of gases and gas condensates. That is proved by the discovery of a large number of gas emergences beyond the 4-5 km in a section of the only well drilled beyond the 6 km such as Vuktylskaya-58. Generation and accumulation of gas hydrocarbons occurred mainly after the appearance of thrust dislocations, when the main traps were formed both at ordinary and high depths

Evaluating the efficiency of the research sector in Russian regions: a dynamic data envelopment analysis

The nonparametric method of dynamic data envelopment analysis (DDEA) has become increasingly popular for conducting comparative efficiency evaluations. In recent years, dynamic data envelopment analysis (DDEA), a variant of this method, has gained significant attention. This article applies dynamic analysis to evaluate the efficiency of the research sector in Russian regions. Traditional input variables such as the number of research staff and R&D expenditure are considered, while publication and patent metrics serve as output indicators. The analysis covers a substantial time period, spanning from 2009 to 2020. Notably, the proposed evaluation method incorporates publication quality measures as a carry-over variable, in addition to accumulated R&D expenditure. The study employs dynamic data envelopment analysis to compare the obtained results with previous evaluations of the research and technology sector in Russian regions. The findings demonstrate that the proposed method serves as a valuable ranking technique, enhancing existing evaluations of regions' research and technology potential in terms of efficiency. The article concludes by discussing the prospects and limitations of the method in evaluating and forecasting research and technology profiles of regions

ABOUT SELF-STUDY OF PHYSICAL CULTURE DURING THE EXAMINATIONS AS A CRITERION OF STUDENTS’ READINESS TO PROFESSIONAL ACTIVITIES

Purpose of the study: The relevance of the research is conditioned by the contradiction between the social and state need to form the positive attitude to healthy lifestyle (including extracurricular time) in student youth and the underestimation of the potential of students' self-study activities aimed at increasing of physical activity and development of readiness for physical culture in specified group of youth. The article is aimed at the study of the student’s readiness for independent physical education during the examinations as a manifestation of independence in general, as well as at the study of the significance of independent physical education of students during the examinations in the process of future specialist formation. Methodology: The leading approach to the study of this problem was the theory of the activity approach in the development of personality and independent activities of students which allowed to substantiate the place of readiness of university students for independent physical training during the examinations in the process of future specialist training. Results: Of all the types of special readiness, the readiness of university students for independent physical training during examinations is of particular importance, the specificity of which is that this type of readiness contains features of types of readiness for professional activity, as well as readiness to act in problem situations, in which connection the readiness for independent physical training during the examinations is an indicator of the future specialist's readiness to problem professional situation. Applications of this study: The results of the study allow specialists who study the quality of university graduates to use the assessment of the development of student’s readiness for independent physical training during the examinations as an indicator of the future specialist’s readiness to act in a problem situation. Novelty/Originality of this study: The authors note that this problem cannot be solved by simply increasing the hours envisaged by the curriculum for independent work in the framework of the subject “Physical Education”, i.e. increase in quantity. A qualitative change in the approach to independent work of students, an appropriate system of actions in her organization and planning are necessary to achieve the desired effect

Неравенство возможностей в российских регионах: объективные оценки и особенности восприятия населением

Неравенство доходов, обусловленное неравенством возможностей, может приводить к замедлению экономического развития и социальной нестабильности. В работе проводится анализ неравенства возможностей в трех регионах России (Москва, Ставропольский край, Челябинская область). Для каждого региона получены оценки вклада неравенства возможностей в неравенство доходов (объективные оценки), а также проанализировано субъективное восприятие неравенства возможностей населением (субъективные оценки). Проведено сопоставление объективных показателей неравенства возможностей на уровне регионов и на национальном уровне. Важным направлением работы является анализ соответствия субъективного восприятия неравенства возможностей населением региона его объективным оценкам. Эмпирической базой исследования являются данные специализированного социологического обследования населения, проведенного РАНХиГС в 2019 г. В работе используются методы, обеспечивающие сопоставимость наших оценок с результатами, полученными в работах российских и зарубежных ученых. На региональном уровне вклад неравенства возможностей в трудовые доходы составляет 9–12 %, а в среднедушевые — 7–13 % , что заметно ниже общенациональных оценок, полученных в более ранних исследованиях. Мы объясняем это, в частности, наличием в России существенного межрегионального неравенства. Интегральный индекс субъективного восприятия неравенства возможностей, построенный на базе информации о восприятии населением различных факторов достижения успеха, показывает, что 14–20 % населения в регионах оценивают проблему неравенства возможностей как важную или очень важную, а 6–11 % — как очень важную. С помощью регрессионного анализа факторов субъективного неравенства возможностей в работе показано, что высокий уровень образования и самооценки собственного материального положения снижает остроту восприятия неравенства возможностей. Значительных региональных различий выявлено не было — восприятие неравенства в большей степени определяется не местом проживания, а индивидуальными характеристиками респондентов. Объективные и субъективные оценки регионального неравенства возможностей заметно различаются, что согласуется с выводами международных исследований. Например, в Ставропольском крае восприятие неравенства возможностей выше, чем в других регионах, а объективная оценка вклада неравенства возможностей, наоборот, ниже.

Неравенство возможностей в российских регионах: объективные оценки и особенности восприятия населением

Неравенство доходов, обусловленное неравенством возможностей, может приводить к замедлению экономического развития и социальной нестабильности. В работе проводится анализ неравенства возможностей в трех регионах России (Москва, Ставропольский край, Челябинская область). Для каждого региона получены оценки вклада неравенства возможностей в неравенство доходов (объективные оценки), а также проанализировано субъективное восприятие неравенства возможностей населением (субъективные оценки). Проведено сопоставление объективных показателей неравенства возможностей на уровне регионов и на национальном уровне. Важным направлением работы является анализ соответствия субъективного восприятия неравенства возможностей населением региона его объективным оценкам. Эмпирической базой исследования являются данные специализированного социологического обследования населения, проведенного РАНХиГС в 2019 г. В работе используются методы, обеспечивающие сопоставимость наших оценок с результатами, полученными в работах российских и зарубежных ученых. На региональном уровне вклад неравенства возможностей в трудовые доходы составляет 9–12 %, а в среднедушевые — 7–13 % , что заметно ниже общенациональных оценок, полученных в более ранних исследованиях. Мы объясняем это, в частности, наличием в России существенного межрегионального неравенства. Интегральный индекс субъективного восприятия неравенства возможностей, построенный на базе информации о восприятии населением различных факторов достижения успеха, показывает, что 14–20 % населения в регионах оценивают проблему неравенства возможностей как важную или очень важную, а 6–11 % — как очень важную. С помощью регрессионного анализа факторов субъективного неравенства возможностей в работе показано, что высокий уровень образования и самооценки собственного материального положения снижает остроту восприятия неравенства возможностей. Значительных региональных различий выявлено не было — восприятие неравенства в большей степени определяется не местом проживания, а индивидуальными характеристиками респондентов. Объективные и субъективные оценки регионального неравенства возможностей заметно различаются, что согласуется с выводами международных исследований. Например, в Ставропольском крае восприятие неравенства возможностей выше, чем в других регионах, а объективная оценка вклада неравенства возможностей, наоборот, ниже.

Copolymer of chitosan with acrylamide: electron beam stimulated synthesis, structure and properties

The aim of this research was to obtain the grafted copolymer of chitosan with acrylamide using the electron beam irradiation. Radiation dose was varied from 6 to 160 kGy. The highest yield of the product was observed at radiation dose of 12–40 kGy. Further increase in the dose caused a decrease in the product yield as well as its solubility in water. Using gel permeation chromatography, it was confirmed that unreacted chitosan remained in the product. NMR study of the water-soluble part of the product obtained under the doses of 6, 12, and 20 kGy showed that the length of the side chains of grafted acrylamide was about 2 elementary units. Investigation of chitosan solutions by means of dynamic light scattering revealed the presence of chitosan agglomerates in the solution. The possibility of obtaining dense films was demonstrated. Mechanical treatment of the copolymer in the ball mill caused an increase in the solubility of the samples obtained even at radiation doses of 80 and 160 kGy. It was determined by means of chromatographic methods that there were no products with low molecular weight in the ball-milled product, and unreacted chitosan did not undergo mechanocracking during the mechanical treatment