Simultaneous spectrophotometric determination of chromium(VI) and iron (III) by H-point standard addition method

In this work the possibility of simultaneous spectrophotometric determination of chromium (VI) and iron (III) in alloys with help of the mixed organic reagent (diphenylcarbazide and 1,10-phenanthroline) is studied. We have applied Н-point standard addition method to determine concentrations of chromium (VI) and iron (III) from the mixture. The pure signals of complexes of chromium (VI) with diphenylcarbazide and iron (III) with the 1,10-phenanthroline and their calibration plots are previously carried out. We established the possibility of simultaneous determination of chromium (VI) and iron (III) in the different concentration ranges by Н-point standard addition method. Correctness of determination of concentration by means of the offered technique is proved by "added-found" method for a series of mixtures with different ratios of concentration of chromium (VI) and iron (III). It is founded that the error of determination of concentration doesn't exceed 33 %.

Learning analytics in massive open online courses as a tool for predicting learner performance

Learning analytics in MOOCs can be used to predict learner performance, which is critical as higher education is moving towards adaptive learning. Interdisciplinary methods used in the article allow for interpreting empirical qualitative data on performance in specific types of course assignments to predict learner performance and improve the quality of MOOCs. Learning analytics results make it possible to take the most from the data regarding the ways learners engage with information and their level of skills at entry. The article presents the results of applying the proposed learning analytics algorithm to analyze learner performance in specific MOOCs developed by Ural Federal University and offered through the National Open Education Platform. © 2018, National Research University Higher School of Economics.This study was support- ed by financial assis- tance provided under the Resolution of the Government of the Rus sian Federation No. 211, Contract No. 02. A03.21.0006. Translated from Russian by I. Zhuchkova

Personalized patterns of teachers training in document science course subjects in a vocational pedagogical university

The article is focused on the study of challenging issues which occur when updating methodological-pedagogical support and applying personalized educational paths in the training of future teachers of document science course subjects for intermediate vocational education institutions, as well as according to various other programmes of students training as part of the "Vocational training (by branches)" course. The key method of the given problem research is meant to be analysis and experience summarization of vocational-oriented, academic, teaching and guiding and scientific work with the students of Russian State Vocational Pedagogical University, being taught according to principal educational programme "Document management in an organization" as part of "Vocational training (by branches)" preparation as well as learning methodological approaches for creating personalized educational paths for them. Research results: developed approaches to applying personalized educational paths in the training of students in a vocational pedagogical university; drawn-up recommendations on updating methodological-pedagogical support in the training of future teachers of document science course subjects for intermediate vocational education institutions, undertaken analysis of the possible ways of improving their training. The content of the article may prove helpful for: university faculty and universities chief executives for the improvement of the training quality of future professionals, for more effective educational process organization, for forming personalized educational paths in the training of students; for chief executives of intermediate vocational education institutions where the specialized training "Document support of management and archive science" is provided; for students being trained as part of "Vocational training (by branches)" course. © Authors

People with mental disability as human rights carriers: the example of implementing the right to education in Russia

This study was aimed at investigating the realization of the right to education as a human right for people with mental disabilities in the context of Russi

The Outburst of the Blazar AO 0235+164 in 2006 December: Shock-in-Jet Interpretation

We present the results of polarimetric ($R$ band) and multicolor photometric ($BVRIJHK$) observations of the blazar AO 0235+16 during an outburst in 2006 December. The data reveal a short timescale of variability (several hours), which increases from optical to near-IR wavelengths; even shorter variations are detected in polarization. The flux density correlates with the degree of polarization, and at maximum degree of polarization the electric vector tends to align with the parsec-scale jet direction. We find that a variable component with a steady power-law spectral energy distribution and very high optical polarization (30-50%) is responsible for the variability. We interpret these properties of the blazar withina model of a transverse shock propagating down the jet. In this case a small change in the viewing angle of the jet, by $\lesssim 1^o$, and a decrease in the shocked plasma compression by a factor of $\sim$1.5 are sufficient to account for the variability.Comment: 22 pages, 8 figures, accepted for Ap

Hole-hole interaction in a strained Inx_xGa1−x_{1-x}As two dimensional system

The interaction correction to the conductivity of 2D hole gas in strained GaAs/In$_x$Ga$_{1-x}$As/GaAs quantum well structures was studied. It is shown that the Zeeman splitting, spin relaxation and ballistic contribution should be taking into account for reliable determination of the Fermi-liquid constant $F_0^\sigma$. The proper consideration of these effects allows us to describe both th temperature and magnetic field dependences of the conductivity and find the value of $F_0^\sigma$.Comment: 7 pages, 6 figure

Регулирование деятельности и финансовой устойчивости банковских групп в России

More complex activities, financial reporting, and risk aggregation of banking groups increase the relevance of research on their financial stability. The purpose of our study is to analyze the effectiveness of banking groups’ regulation in the Russian Federation and to develop proposals for its optimization. The scientific novelty includes the identification and proof of the hypothesis of the dependence of the banking groups’ financial stability on the level of the group control, as well as measures to improve the regulation of activities and financial stability of banking groups in Russia. The research methodology is based on a linear model on panel data (fixed effects models, random effects models, and pool models). The empirical base of the study includes data on the 26 largest Russian banking groups and parent credit institutions of banking groups from 2010 to 2020. A hypothesis was put forward that the financial stability of the banking group depends on the effectiveness of the regulatory control within the group. To confirm the hypothesis, the authors assessed the financial stability of banking groups using the Zscore, while the banking groups were divided into two pools depending on the level of regulatory control. As a result, this hypothesis was confirmed. For banking groups with a high level of regulatory control, a model of financial stability and the factors that have the greatest impact on it were identified. The authors suggested the following measures to improve the regulation and financial reporting of the banking groups: 1) to expand the regulatory consolidation of the reporting of banking groups to the level of accounting, which will create the basis for a complete risk assessment; 2) to clearly define approaches to formalizing the assessment and management of the forced financial support risks for the group companies; 3) to unify the disclosure by banking groups of information about risks, methods for their assessment and management, including the relationship with the business model of activity. These measures are aimed at improving the risk management of credit institutions.Усложнение деятельности, финансовой отчетности и агрегирование рисков банковских групп определяют актуальность исследований в области обеспечения их финансовой устойчивости. Цель работы - определение эффективности регулирования деятельности банковских групп в России и разработка предложений по его оптимизации. Научная новизна состоит в формулировке и доказательстве гипотезы зависимости финансовой устойчивости банковских групп от уровня контроля в группе, а также в разработке предложений по совершенствованию регулирования их деятельности и финансовой устойчивости. Методология исследования построена на использовании линейной модели на панельных данных (модели с фиксированными эффектами, модели со случайными эффектами и модели пула). Эмпирическая база исследования включает данные по 26 крупнейшим российским банковским группам и головным кредитным организациям банковских групп с 2010 по 2020 г. Выдвинута гипотеза о зависимости финансовой устойчивости банковских групп от эффективности организации контроля в рамках группы. Проведена оценка финансовой устойчивости банковских групп с применением показателя Zscore, при этом они были разделены на два пула в зависимости от уровня регуляторного контроля. В результате исследования данная гипотеза была подтверждена. Для банковских групп с высоким уровнем регуляторного контроля построена модель финансовой устойчивости и выявлены основные факторы, ее определяющие. Предложены следующие меры, направленные на совершенствование регулирования и формирования финансовой отчетности банковских групп: 1) расширить периметр регуляторной консолидации отчетности банковских групп до уровня бухгалтерской, что позволит создать основу полного учета рисков; 2) четко определить подходы к формализации оценки и управлению риском вынужденной финансовой поддержки компаний группы; 3) унифицировать раскрытие банковскими группами информации о рисках, методах их оценки и управления, включая взаимосвязь с бизнес-моделью деятельности. Принятие названных мер будет способствовать совершенствованию управления рисками кредитных организаций

Risk Assessment at the Cosmetic Product Manufacturer by Expert Judgment Method

A case study was performed in a cosmetic product manufacturer. We have identified the main risk factors of occupational accidents and their causes. Risk of accidents is assessed by the expert judgment method. Event tree for the most probable accident is built and recommendations on improvement of occupational health and safety protection system at the cosmetic product manufacturer are developed. The results of this paper can be used to develop actions to improve the occupational safety and health system in the chemical industry