Effect of parameters of heat treatment on magnetic properties and magnetization distribution in ribbons of amorphous soft magnetic iron-based alloys

The effect of the isothermal-holding temperature and cooling rate upon in-air heat treatment on the magnetic properties and magnetization distribution in ribbons of amorphous soft magnetic iron-based alloys with positive saturation magnetostriction has been investigated. The results of the investigation showed that the dependence of the maximum magnetic permeability on the isothermal-holding temperature correlates with the corresponding changes in the magnetization distribution in the ribbon and is determined by diffusion processes that occur upon in-air heat treatment at a specific isothermal-holding temperature. An increase in the cooling rate leads to an ambiguous effect on the level of magnetic properties. The increase favors an improvement in magnetic properties when, after in-air heat treatment, either a predominantly amorphous state of the surface or a state with the formed amorphous-crystalline surface layer with a nearly optimal thickness is obtained. © 2013 Pleiades Publishing, Ltd

Effect of chemically active medium on frequency dependence of magnetic losses in soft magnetic Fe-based amorphous alloys

The effects of the electrolytic hydrogenation and oxidation and of the interaction of the surface ribbon with water and vapor on the frequency dependence of magnetic losses per magnetization-reversal cycle are studied based on the example of soft magnetic Fe81B13Si 4C2 amorphous alloy, which exhibits a positive saturation magnetostriction. It was shown that, after the hydrogenation and oxidation of soft magnetic amorphous alloys, their frequency dependences of magnetic losses per magnetization-reversal cycle, which are reduced to unit induction, exhibit groups of hydrogen- and oxygen-related peaks in the frequency ranges of 35-55 and 55-80 Hz, which can be explained by the formation of O-A and H-A atomic pairs (where A are atoms of alloy components) and their reorientation in a magnetic field in the course of magnetization reversal at certain frequencies. The formation of analogous groups of peaks for samples of soft magnetic Fe-based amorphous alloys was observed after the interaction of the ribbon surface with water and vapor and after heat treatment in air. This fact confirms the possibility of the hydrogenation and oxidation of the alloys during the aforementioned processes. © 2013 Pleiades Publishing, Ltd

LPDs – «Linked to penumbra» discharges or EEG correlate of excitotoxicity: A review based hypothesis

Periodic lateralized epileptiform discharges (PLEDs) or lateralized periodic discharges (LPDs) are a well-known variant of pathological EEG activity. However, the mechanisms underpinning the appearance of this pattern are not completely understood. The heterogeneity of the features derived from LPDs patterns, and the wide range of pathological conditions in which they occur, raise a question about the unifying mechanisms underlying these phenomena. This paper reassesses the current opinion surrounding LPDs which considers glutamate excitotoxicity to be the primary pathophysiological basis, and the penumbral region to be the main morphological substrate. Arguments in favour of this hypothesis are presented, with interpretations supported by evidence from recent literature involving clinical and experimental data. Presently, no single hypothesis places considerable emphasis on the pathochemical properties of LPDs, which are implicitly meaningful towards better understanding of the clinical significance of this pattern. © 2020 Elsevier B.V.This work was supported by the Russian Science Foundation [grant number 16-18-10371 ]

ТЕОРЕТИЧЕСКИЕ И ПРАКТИЧЕСКИЕ АСПЕКТЫ РЕАЛИЗАЦИИ ЗАКУПОЧНОЙ ЛОГИСТИКИ В РЕСПУБЛИКЕ БЕЛАРУСЬ

Nowadays an interest to the problem concerning an efficient and rational purchasing control arises in the real sector of economy. Planning of resource requirements, an in-time delivery system, quality and productivity preferences have caused revision of many conventional purchasing concepts. The paper considers some theoretical aspects of purchasing logistics and practice of its application in the Republic of Belarus.В настоящее время в реальном секторе экономики возрастает интерес к проблеме эффективного и рационального управления закупками. Планирование потребности в сырье, система своевременности поставок, акцент на качество и производительность потребовали пересмотра многих традиционных концепций закупок. Рассмотрены некоторые теоретические аспекты закупочной логистики, а также практика ее применения в Республике Беларусь

МАЛЫЙ И СРЕДНИЙ БИЗНЕС: ЛОГИСТИЧЕСКАЯ И СОЦИАЛЬНО-ЭКОНОМИЧЕСКАЯ ФУНКЦИИ

Entrepreneurship is one of the factors that can ensure a sustainable character to the development of Belarus. The present Belarusian entrepreneurship should select the required forms and determine development priorities. It is practically impossible to do it without taking into account modem global social and economical tendencies and also specificity of Belarusian mentality and traditions. In this sense priority status is given to small and middle-sized business because it is considered as an element of economic system that ensures stability to economy. Small and middle-sized business is an ideal logistical model that provides harmonization of interests and optimization of management solutions.Одним из факторов, который может придать развитию Беларуси устойчивый характер, является предпринимательство. Белорусское предпринимательство в нынешних условиях стоит перед выбором форм и определения приоритетов развития, обозначить которые не представляется возможным без учета современных общемировых социально-экономических тенденций, а также специфики белорусской ментальности и традиций. И в этом смысле приоритетный статус занимает сектор малого и среднего бизнеса как элемент экономической системы, придающей экономике стабильность. Малый и средний бизнес является идеальной логистической моделью, которая обеспечивает гармонизацию интересов и оптимизацию управленческих решений

Lake water quality of Kazan city (Russia) Kaban lake in the anthropogenic pollution conditions and improving actions implementation

© Research India Publications. Researches of lake water quality for the Kaban system in Kazan are conducted. Lakes Lower and Mid Kaban in the past were suitable for city water supply, but because of the trade and household sewage intake, by 1970th it became strongly polluted. For the purpose of water quality improvement the project of improvement, according to which the majority of the sewage production earlier dumped to lakes was taken away on treatment facilities, was developed and realized, cleaning was carried out for bottom of lakes L. Kaban and M. Kaban from the polluted ground deposits, the collecting pipe for collecting the emergency sewer waters is constructed, coasts are well arranged. Improvement of water quality turned out to be consequence of the held events. However, the anthropogenic impact remains rather high. The researches of water we conducted in Kaban Lake showed its low quality. In this regard, for each of the studied lakes the main sources of pollution were revealed. On the basis of impact level assessment on lakes and their current state, the set of measures for improvement of water quality is offered

New aspects in the study of clinical and morphological features of uterine blood flow in type 1 diabetes mellitus in the mother

The aim of the study was to develop new approaches to the study of modern aspects of the clinical and morphological features of uterine blood flow in type I diabetes mellitus in the mothe

Assessing economic losses of the small river ecosystems and developing of compensation measures within the framework of sports facilities construction

The article describes the basic theoretical principles that underpin the economic calculation of environmental damage in the course of human economic activity. As an example the assessing of the losses from the impact of the construction of sports facilities in the floodplain of a small river. We have calculated the environmental losses arising in the course of preparation and construction activities. Developed compensatory measures that reduce the effects of damage caused by the construction work