On one integrable system with a cubic first integral

Recently one integrable model with a cubic first integral of motion has been studied by Valent using some special coordinate system. We describe the bi-Hamiltonian structures and variables of separation for this system.Comment: LaTeX with AMS fonts, 9 page

Economic shocks and health resilience: lessons from the Russian Federation

Background: Despite extensive research on determinants of health, there is much less information on factors protecting health among those exposed to economic shocks. Using longitudinal data from the Russian Federation in the post-Soviet period, we examined individual-level factors that enhance resilience of health to economic shocks. Methods: Logistic regression analysed factors associated with good self-assessed health (SAH) and health resilience, using pooled samples from the Russia Longitudinal Monitoring Survey-Higher School of Economics (1994–2012). Results: The general population consistently reported ‘average’ SAH, indicating almost invariant trends over the years. Male gender was the strongest predictor of good SAH and health resilience. Other factors positively associated with good SAH were age, higher education, employment, residing in rural areas, living in a larger and/or non-poor household. Among unemployed and those remaining unemployed, residing in rural areas, living in a larger and/or non-poor household remained the strongest predictors of good SAH and health resilience. These same factors were also important for males with recent job loss. Conclusions: Several factors predicting good SAH in the general population also influence health resilience factors among those remaining unemployed and experiencing a job loss. Such factors help to identify those most vulnerable and aid targeting assistance during economic crises

The Maupertuis principle and canonical transformations of the extended phase space

We discuss some special classes of canonical transformations of the extended phase space, which relate integrable systems with a common Lagrangian submanifold. Various parametric forms of trajectories are associated with different integrals of motion, Lax equations, separated variables and action-angles variables. In this review we will discuss namely these induced transformations instead of the various parametric form of the geometric objects

Canonical transformations of the extended phase space, Toda lattices and Stackel family of integrable systems

We consider compositions of the transformations of the time variable and canonical transformations of the other coordinates, which map completely integrable system into other completely integrable system. Change of the time gives rise to transformations of the integrals of motion and the Lax pairs, transformations of the corresponding spectral curves and R-matrices. As an example, we consider canonical transformations of the extended phase space for the Toda lattices and the Stackel systems.Comment: LaTeX2e + Amssymb, 22p

Labor capital development of the region in the focus of sociological research: factors and problems

The presented work analyzes the features, problems and factors of labor capital development of the Republic of Bashkortostan based on the data of a sociological study conducted by the Institute for Socio-Economic Research of the Ufa Federal Research Center of the Russian Academy of Sciences in 2021. A number of problems faced by the able-bodied population are considered, including: a relatively low standard of living of the population, which hinders the provision of the quality of life and professional productivity of workers; gender inequality in the distribution of labor incomes of the population; the predominance of negative assessments of the able-bodied population of their physical condition, the quality of their leisure and vacations; discrepancy between the high qualification of employees and the functions performed, which does not allow them to fully realize their labor potential in the workplace. Particular attention is paid to the analysis of values that prevail in the minds of the able-bodied population and determine their labor behavior, and as a result, have a negative impact on the formation of labor capital. Thus, it was revealed that the value orientations of the population of the Republic of Bashkortostan are typical for countries of “catching up” development. In this regard, the authors substantiate the necessity of cultivating the values of rationality of financial thinking, equality, self-expression and autonomy, as well as improving institutions that support these values in society. These values act as factors in the formation of high-quality labor capital in the conditions of modern Russi

МОДЕЛИРОВАНИЕ ПРОЦЕССОВ ФОРМИРОВАНИЯ ИНТЕРФЕРЕНЦИОННОГО ЭЛЕКТРОМИОГРАФИЧЕСКОГО СИГНАЛА

The work presents the preliminary results of modeling interference elektromyographic signal. This model shows the possibility of obtaining information about the shape, duration, repetition frequency of the single motor unit action potential (SMUAP) of the elektromyographic interference signal.В работе представлены предварительные результаты моделирования интерференционного электромиографического сигнала. Данная модель показывает возможности получения информации о форме, частоте, длительности следования потенциала действия отдельной двигательной единицы (ПДОДЕ) интерференционного электромиографического сигнала.У роботі представлені попередні результати моделювання інтерференційного електроміографічного сигналу. Дана модель дає можливість отримання інформації про форму, частоту, тривалість слідування потенціалу дії окремої рухової одиниці (ПДОРО) інтерференційного електроміографічного сигналу.

Individual features of geometric figures discrimination by three species of reptiles

Background (context). The individual characteristics of reptiles have been studied less than that of other classes of animals. One of the basic properties of their individuality, impulsivity, on which behavior and the solution of cognitive tasks in humans and animals significantly depend, has not been practically investigated. Objective. To study manifestations of impulsivity in decision-making in visual recognition in three types of reptiles. Design. In ten experiments, each of six individuals of three reptile species chose one of two paths in the task of distinguishing geometric shapes in mazes. The indicators of the percentage of erroneous choices and the average time for making choices were evaluated relative to the corresponding median values, similar to the study of a person’s impulsivity when choosing among similar visual images in the Kagan test. Results. Among the individuals of each species, four individual typological groups were distinguished: impulsive, slow — accurate, fast — accurate, and slow — inaccurate. This confirmed the authors’ hypothesis based on their study of color recognition in common grass snakes. In slow — accurate and slow — inaccurate individuals, repeated turns to the stimuli being compared were observed before they made a decision, apparently reflecting the expanded analysis of visual information, unlike in most impulsive and fast-accurate individuals. Conclusions. The four individual-typological groups identified in the three types of reptiles in the task of visual recognition are similar in terms of impulsivity to the known groups of people identified in a similar task. The differences in the behavioral reactions of individuals of the four typological groups of reptiles before making a decision correspond to the different psychological content of such a choice in these groups. Our results, which were obtained for reptiles for the first time, confirm the concept of impulsivity as one of the fundamental biologically determined characteristics of individuality, which is valid for other species of animals and humans. In the future it would be useful to find out: 1. Whether the following methods of studying impulsivity evaluate the same individual characteristic of animals: the well-known method of choosing the type of reinforcement and the auto method of choosing the path in the labyrinth with visual discrimination; 2. Do the assessments of impulsivity by these methods correlate with assessments of courage in reactions to a new object, territory and food? The practical significance of the work lies in the fact that knowledge of the individual characteristics of reptiles allows us to develop scientifically based recommendations for maintaining their well-being in zoos and nurseries

Scientific schools of the faculty of psychological, pedagogical and special needs education of Saratov State University: The diachronic aspect

.The relevance of the study is due to the objective necessity to generalize the main trends of scientifi c research that have been developed earlier with the intergenerational communication and development of modern scientifi c schools of the Faculty of Psychological, Pedagogical and Special Needs Education of the Saratov State University, which is celebrating its 45th anniversary in November 2023. The purpose of the study is to generalize the experience of formation and development of scientifi c schools of the Faculty of Psychological, Pedagogical and Special Needs Education of Saratov State University from the diachronic perspective. Methods (tools): retrospective and comparative analysis of the data from scientifi c and bibliographic sources. Results. The contemporary psychological school is presented through the prism of the scientifi c interests of Professor I. V. Strakhov, the pedagogical one is represented through the works of academician N. F. Posnansky, the defectological school is analyzed through the works of the founder of Russian typhlopedagogics (methods of teaching the blind) A. A. Krogius. The study analyzes the works of V. I. Balayeva, K. F. Sedov, G. K. Parinova, E. A. Alexandrova, R. M. Shamionov, M. V. Grigorieva, Yu. V. Selivanova and other methodologists in a retrospective and perspective aspects. For the fi rst time, an attempt has been made to outline the origins of the methodological school of the faculty. The study also presents the experience of several generations of the faculty teachers connected with their participation in the creation of federal and regional textbooks for schools and workbooks for students, which was predetermined by the series of publications “Pedagogical Institute for the School”. The range of modern scientifi c and methodological interests of the faculty stuff is systematized: grant projects, initiative research topics of the faculty chairs, the agenda of the dissertation boards. Moreover, the study presents the faculty research cluster: it has specifi ed the existing laboratories, centers, and equipment for collecting empirical data. Conclusion. The study has summarized the experience of the formation and development of scientifi c and methodological schools of the faculty. It has identifi ed traditional research issues that are characteristic of all the stages of diachronic development and the transformed research topics and/or the issues that re-emerged under the infl uence of the public demand of the modern world and the current socio-cultural situation

Polymeric Coatings Composition Based on Modified Oligopiperylene Styrene Binders with Galvanic Sludge as a Filler

Abstract The possibility of development of new coating materials based on oligopiperylene styrene modified with alkoxysilane and galvanic sludge as a pigment-filler is presented in this article. The nanostructure of the coating surface and the influence of the composition and nature of the components of paint and varnish materials on its property are studied. These materials are intended for protection buildings from the effects of adverse factors