Modeling of the polymerization process of the insulating layer of cable thermocouples

A mathematical model describing the main physical processes occurring during thermal processing of cable thermocouples (CT) during their production is presented. The polymerization of the insulating layer is taken into account in the conditions of its intense heating. The developed mathematical model allows to carry out calculations of heat transfer processes under the conditions of substantial heterogeneity of cable thermocouple structure. The computational experiments carried out have established significant differences in the characteristics of heat transfer in CT in the presence of thermoelectrodes with differing thermophysical characteristics

Modeling of the polymerization process of the insulating layer of cable thermocouples

A mathematical model describing the main physical processes occurring during thermal processing of cable thermocouples (CT) during their production is presented. The polymerization of the insulating layer is taken into account in the conditions of its intense heating. The developed mathematical model allows to carry out calculations of heat transfer processes under the conditions of substantial heterogeneity of cable thermocouple structure. The computational experiments carried out have established significant differences in the characteristics of heat transfer in CT in the presence of thermoelectrodes with differing thermophysical characteristics

QUALITY OF UNIVERSITY MANAGEMENT AND ITS IMPACT ON THE LOCAL COMMUNITY

Higher education is broadly recognized as one of the most significant components of modern social and economic development. The quality of education at a university depends on factors such as how the university is managed, how effective the management decisions are, and what consequences they have for the advancement of society. While the consequences have numerous hardly equitable aspects, this article hypothesizes that it is possible to build a synthetic model for the assessment of university management, that takes into account a full range of existing quantitative and qualitative effects. The study aims to identify the relationship between the quality of management and the performance variables needed to build the model. The research methodology includes the application of econometric analysis for the formation, ranking, and determination of point values of a balanced scorecard (BSC). Finally, the findings of this research led to the creation of a workable model that allows both direct and reverse translation of a quantitative management assessment into a qualitative (verbal) one. Further, the verification using the available empirical data confirmed the model’s validity. We would thus recommend this model for solving a whole range of university management issues, especially in areas with predominant ripple and indirect effects, i.e., in the interaction of higher education entities with regional and local communities. &nbsp

Role of MNCs in changing preferences for food consumption in Russia under import substitution

The paper analyses the changes in the food market in terms of supply and demand in the context of import substitution and a decrease in the purchasing power of the population. It explores the reasons behind a rise in food prices, studies consumer preferences and criteria for choosing food products, and reveals the distinguishing features of Russian consumers’ behavior in the food market under the conditions of the import substitution policy. The article shows that, in general, multinational companies engaged in the food industry have managed to successfully integrate into the import substitution policy in the context of post-crisis development.peer-reviewe

Economic Ecosystems and Their Classification

The most important trends in modern social development are economic convergence and digitalization. It is their interaction that creates new opportunities for increasing competitiveness and efficiency in the framework of joint business of representatives of various segments and sectors of the economy. The main institutional and organizational form of doing business within the framework of intersectoral economic convergence under the influence of digitalization is becoming an ecosystem. The aim of the article is to clarify the concept of an ecosystem as a form of joint business in the context of intersectoral economic convergence and digitalization, as well as to build a classification of ecosystems. The study puts forward the following hypothesis the ecosystem as an institutional and organizational form of running a joint business is the result of the simultaneous influence of intersectoral economic convergence and digitalization on it, and “the connection of the basic product provided to the client by the initiator of the intersectoral economic convergence before the creation of the ecosystem with digital and/or information technology ”can be used for the economic ecosystems classification. The novelty of the approach is the following. Considering an ecosystem as a form of joint business running with the simultaneous impact of economic intersectoral convergence and digitalization on it makes it possible to clarify the concept of an ecosystem, highlight as the ecosystem parameter used to the ecosystem classify and as its main characteristic, the values of which can be used to construct a classification of economic ecosystems

Systemic Risks of Management in the Implementation of State Policy on Education and Science: Analysis of Problem Situation, Risks and their Identification

Significant changes occurring in the management by Russian education and science, accompanied by the appearance and the possibility of various risks. Since education and science can be regarded as an integral single system of interrelated elements forming it, object of consideration is the systemic risks. They are caused by the education and science management as a single system and their implementation may lead to the destruction and even death of system of the Russian education and science. The article analyzes the problem situation related to the status and development of Russian science and higher education in the conditions of their reforming, of the state policy in the field of science and training. Analysis of the values and the dynamics of the main indicators of the status and development of the Russian science and higher education are given also. The results showed the following. Management decisions for the implementation of the measures of state policy on education and science are accompanied really by various risks, including system risks. The article presents the author’s approach to the definition of systemic risk, described by certain parameters. Based on the analysis significant system management risks associated with the conduct of Russian state policy in the sphere of education and science are highlighted. Identification of the relevant systemic risks is given in the context of concrete management decisions. The possibility of realization of systemic risk is confirmed by real examples

ANALYSIS OF OPPORTUNITIES TO IMPROVE IMAGE DENOISING EFFICIENCY FOR DCT-BASED FILTER

The subject matter of the paper is the process of image filtering. The goal is to provide high efficiency of denoising according to metrics that are more adequate to human vision system than traditional criteria as mean square error or peak signal-to-noise ratio. The tasks to be solved are the following: to carry out analysis of denoising efficiency using visual quality metric, to determine optimal settings of DCT-based filter depending upon image and noise properties, to propose a method for setting a global threshold adaptively (in quasi-optimal manner) based on preliminary analysis of image and noise properties. The following results have been obtained: 1) optimal values of filter parameters depend upon many factors including image complexity and noise intensity, 2) optimal values also depend on optimization criterion (or metric) used to characterize filter performance; 3) optimal values of parameter β that determines the threshold can considerably differ from 2.6 which is traditionally recommended; 4) this opens opportunities for improving image denoising efficiency; 5) one of this opportunities consists in preliminary analysis of image and noise properties with setting the threshold value according to the obtained dependences. Conclusions: 1) the filter performance can be sufficiently improved due to the proposed adaptive procedure; 2) this happens if either noise is intensive and image has a simple structure or if noise is not too intensive and image has a complex structure; 3) the proposed adaptive procedure requires a very small amount of additional computations for calculating input parameter and can be realized by 60 or more times faster than filtering itself; 4) the adaptive procedure slightly differs depending upon a metric used as performance criterion

CARACTERÍSTICAS ESPECÍFICAS DAS ORIENTAÇÕES PARA A VIDA ENTRE ESTUDANTES E SUA INTER-RELAÇÃO COM A FORMAÇÃO PROFISSIONAL

O autor deste artigo considera um estudo empírico das orientações de vida dos estudantes e sua inter-relação com a formação profissional. Os principais objetivos do estudo são: conduzir a análise teórica das orientações de vida; compor um bloco de técnicas psicodiagnósticas para estudar orientações de vida entre estudantes de vários programas de estudo ;. O significado prático do estudo consistiu na compilação de um bloco de técnicas de psicodiagnóstico que podem ser usadas para diagnosticar as orientações de vida de uma pessoa e a esfera de valor-significado. Além disso, com base nos dados obtidos, é possível desenvolver suporte corretivo para orientações de vida e características pessoais e pessoais relacionadas da pessoa.El autor de este artículo considera un estudio empírico de las orientaciones de vida de los estudiantes y su interrelación con la formación profesional. Los principales objetivos del estudio son: realizar el análisis teórico de las orientaciones de la vida; componer un bloque de técnicas de psicodiagnóstico para estudiar las orientaciones de la vida entre estudiantes de diversos programas de estudio; La importancia práctica del estudio consistió en compilar un bloque de técnicas de psicodiagnóstico que pueden usarse para diagnosticar tanto las orientaciones de la vida de una persona como la esfera del significado del valor. Además, sobre la base de los datos obtenidos, es posible desarrollar un soporte correctivo para las orientaciones de la vida y las características personales individuales relacionadas de la persona.The author of this paper considers an empirical study of students’ life orientations and their interrelation with professional formation. The major objectives of the study are: to conduct the theoretical analysis of life orientations; to compose a block of psychodiagnostic techniques for studying life orientations among students of various programs of study;. The practical significance of the study consisted in compiling a block of psychodiagnostic techniques that can be used to diagnose both the life orientations of a person and the value- meaning sphere. Also, on the basis of the data obtained, it is possible to develop corrective support for life orientations and related individual-personal characteristics of the person

Livelihood implications of in situ-on farm conservation strategies of fruit species in Uzbekistan

The aim of this paper is to analyze the impact of a set of interventions related to on-farm/in situ conservation and use of fruit species (cultivated and wild) on farmers’ livelihoods and species diversity in Central Asia. Specifically, a difference-in-differences propensity score matching is used to evaluate the outcome of a development research program in Uzbekistan between 2005 and 2010. Species crop diversity maintained by farmers before and after the project increased as a result of the interventions, showing the efficacy of the interventions promoted by the projects in terms of conservation. Furthermore, innovations provided by the program increased both household propensity of marketing and self-consumption of target fruit. However, the program’s interventions did not seem to impact significantly any of the indicators related to household livelihoods. The short time elapsed between the end of the project and the impact assessment may be too brief to capture any observable impact on livelihoods

The changes of standard DXA measurements and TBS depending on outcomes of neurosurgical treatment in patients with Cushing's disease

BACKGROUND:Patients with endogenous hypercortisolism have reduced bone mineral density (BMD) and trabecular bone score (TBS) that are the causes of secondary osteoporosis and low-traumatic fractures. It is well known that radical treatment (neurosurgery or radiosurgery) of Cushings disease leads to a decline of cortisol levels in all body fluids to normal values. However, it is still uncertain whether bone tissue structure, and particularly its microarchitecture, does recover in remission of the disease. AIMS:To evaluate an influence of hormone activity (presence or absence of remission) in patients with Cushing's disease on changes of bone structure measurements in accordance with DXA values (TBS, BMD, T- and Z-scores), as well as significance of such changes in 12 and 24 months after neurosurgical treatment. MATERIALS AND METHODS:In patients with confirmed active Cushing's disease (ACTH-producing pituitary adenoma) (n = 44) and in control group of healthy volunteers (n = 40), BMD in lumbar spine (L1-L4) and simultaneously TBS, in cut-off points before neurosurgical treatment (in both groups) and in 12 and 24 months after it (only in patients), were assessed. We diagnosed presence or absence of disease remission at cut-offs. All measurements were performed using a GE iDXA device (GE Healthcare Lunar, Madison, Wisconsin, USA). The TBS was calculated simultaneously from taken BMD scans, blinded to clinical outcome using TBS iNsight software v2.1 (Medimaps, Merignac, France). The activity of Cushings disease was evaluated using late-night salivary cortisol (LNSC, at 23:00). To determine the differences in DXA and TBS values before and after neurosurgical intervention depending on remission occurrence, covariate analysis (ANCOVA) was applied. RESULTS:There were found significant changes in TBS, BMD and T-score values in 12 months after neurosurgical treatment associated with presence or absence of disease remission (p = 0.039, 0.046 and 0.048, respectively). No differences in Z-score as well as in all measurements in 24 months, that might be associated with remission occurrence, were revealed. The gain in all DXA measurements (including TBS) during 24 months of observation period was statistically significant when analyzing data using Students paired t-test. However, the values corresponding to the age references had not been achieved for the specified time interval. CONCLUSIONS:Patients with Cushings disease have lower TBS values. In remission conditions TBS is getting significantly higher. The increase in BMD and TBS occurs during 24 months after achieving remission of Cushings disease but doesnt lead to a full restoration of normal bone mass and microstructure throughout observation period of 24 months