Stresses in the material with multilayered coating under impulse thermal loading

The two-dimensional model of mechanical behavior of the specimen with multi layered coating is formulated. The parametric analysis was carried out for various types of boundary conditions. Stress intensity depending on time was studied. The influence of impulse parameters on the temperature and stresses was investigated. It was revealed that radiation heat losses reduces the action of external loading

Портал «Единое окно» как платформа для репозитория учебно-методических материалов, размещаемых со свободными лицензиями

The paper provides information on a pilot project aimed at setting up a Russian-language repository of Open Educational Resources (OER) developed for higher education institutions. The resources will be available under open licenses (Creative Commons family or other free licenses). This is a joint project of the State Institute of Information Technology and Telecommunications INFORMIKA and the UNESCO Institute for Information Technologies in Education (IITE).В докладе рассматривается проект создания хранилища учебно-методических материалов, создаваемых в вузах и размещаемых в открытом доступе со свободными лицензиями. Данный проект реализуется как совместная инициатива Государственного научно-исследовательского института информационных технологий и телекоммуникаций "Информика" и Института ЮНЕСКО по информационным технологиям в образовании

Symmetries and modelling functions for diffusion processes

A constructive approach to theory of diffusion processes is proposed, which is based on application of both the symmetry analysis and method of modelling functions. An algorithm for construction of the modelling functions is suggested. This algorithm is based on the error functions expansion (ERFEX) of experimental concentration profiles. The high-accuracy analytical description of the profiles provided by ERFEX approximation allows a convenient extraction of the concentration dependence of diffusivity from experimental data and prediction of the diffusion process. Our analysis is exemplified by its employment to experimental results obtained for surface diffusion of lithium on the molybdenum (112) surface pre-covered with dysprosium. The ERFEX approximation can be directly extended to many other diffusion systems.Comment: 19 pages, 8 figure

Эндотелиальная дисфункция у больных ревматоидным артритом с коморбидной патологией

Rheumatoid arthritis (RA) and subclinical hypothyroidism (SHT) have close pathogenetic relationships, the synergism of which worsens the clinical course and increases the risk of visceral complications. Objective: to study the ultrasound parameters of endothelial dysfunction (ED) in patients with RA concurrent with SHT. Patients and methods: 139 patients with RA were divided into two groups: 1) 48 patients with RA; 2) 91 patients with RA concurrent with SHT. The ultrasound parameters of endothelial regulation of vascular tone were determined by intravascular ultrasonography using an ESAOTE MyLAB40 apparatus in accordance with the international guideline. Results and discussion. The study of endothelial regulation of vascular tone established that all the examinees with RA had ED that increased with the higher degree of activity and longer duration of RA. Patients with RA in the presence of SHT had more significant abnormalities in the ultrasound parameters of endothelial regulation of vascular tone and in the degree of ED, which increased with the longer duration and higher activity of the disease. The early detection and correction of comorbidity in patients with RA will reduce cardiovascular risk and improve quality of life. Ревматоидный артрит (РА) и субклиническая гипотиреоидная дисфункция (СГТД) имеют тесные патогенетические взаимосвязи, синергизм которых усугубляет клиническое течение и повышает риск развития висцеральных осложнений. Цель исследования – изучить особенности ультразвуковых показателей эндотелиальной дисфункции (ЭД) у больных РА с СГТД. Пациенты и методы. 139 больных РА были разделены на группы: I группа – 48 пациентов с РA, II группа – 91 больной РА в сочетании с СГТД. Выявление ультразвуковых показателей эндотелиальной регуляции сосудистого тонуса проводилось с помощью УЗИ сосудов в соответствии с международным руководством на аппарате ESAOTE MyLAB40. Результаты и обсуждение. Исследование эндотелиальной регуляции сосудистого тонуса установило наличие ЭД у всех обследованных больных РА, которая усиливалась с нарастанием степени активности РА и длительности заболевания. У больных РА с наличием СГТД отмечаются более значимые нарушения ультразвуковых показателей эндотелиальной регуляции сосудистого тонуса и степени ЭД, нарастающие с увеличением длительности и активности заболевания. Раннее выявление и коррекция коморбидной патологии у пациентов с РА будут способствовать снижению сердечно-сосудистого риска и улучшению качества жизни.

The impact of weather conditions in different years on the biochemical composition of linseed oil

Background. Linseed oil is a versatile product with varying biochemical composition. Linseed breeding is aimed at producing cultivars with different chemical properties in their oil. The crop is widespread but the environment has a great effect on its fatty acid  biosynthesis.Materials and methods. The impact of weather conditions on the variations in fatty acids composition was studied. Twenty linseed cultivars and accessions of diverse origin and with varying oil composition from the VIR collection were grown in Tomsk Province in 2016–2018. The content of 15 fatty acids (lauric, myristic, palmitic, palmitoleic, margaric, stearic, oleic, cis-vaccenic, linoleic, linolenic, arachidic, eicosenic, arachido nic, behenic, and lignoceric) was assessed in linseed oil using gas–liquid chromatography.Results. The tested material presented a wide diversity of genes controlling different steps of fatty acids biosynthesis and genetic mechanisms involved in the responses to the changing environment. The analysis of variance proved that the content of oleic, linoleic, linolenic and lignoceric acids was controlled solely by the genotype. The content of palmitic and stearic acids was influenced by both the genotype and environment. The synthesis of lauric and cis-vaccenic acids was significantly affected by the weather. Practically all acids, except linoleic and linolenic ones, showed a very high random variation, which in our experiment included genotype × environment interaction. The accessions differed in the range of variation in their characters under diffe rent conditions. There was no definite regularity in the hanges of fatty acid content in the tested genotypes during 3 years.Conclusion. The assessed genotypes probably possess different regulatory mechanisms for fatty acid biosynthesis. Thus, they present a diverse stock for further investigations into fatty acid biosynthesis and for the development of new linseed cultivars widely adaptable to environmental conditions

Резерви енергозбереження при автоматизованному управлінні відцентровими насосами електростанцій

У статті проведено аналіз і обробку даних експериментального дослідження відцентрового насоса теплових електростанцій. Показано можливий економічний ефект від використання алгоритмів енергозберігаючого керування відцентровим насосом і визначено закон такого керування.In article is organized analysis and data processing the experimental study of the centrifugal pump heat power station. Possible economic effect is Shown when use algorithm энергосберегающего centrifugal pump management and is determined law of such management.В статье проведен анализ и обработка данных экспериментального исследования центробежного насоса тепловых электростанций. Показан возможный экономический эффект при использовании алгоритмов энергосберегающего управления центробежным насосом и определен закон такого управления

Comparative evaluation of including nutriceutics in complex therapy of patients with primary open-angle glaucoma with accelerated body aging

The purpose of the study is to evaluate the efficacy and safety of the inclusion of nutraceuticals in the complex therapy of patients with POAG.Цель исследования оценить эффективность и безопасность включения различных нутрицевтиков в терапию больных ПОУГ