On the structure of the geomagnetic field at great distances from earth

Solar wind and current sheet considered in determining shape of magnetosphere boundary and calculation of magnetic field line

Particularities of Erosion Processes on the River Chuna (Uda) in the Area of Construction of the Main Oil Pipeline

Дано гидроморфологическое описание реки Чуна (Уда), изложены краткие результаты анализа взаимодействия потока и русла, а также совмещения поперечных профилей русла. На их основе оценена устойчивость русла реки на участке перехода.The article provides a hydromorphological description of the river Chuna (Uda), brief results of the analysis of the flow and river bed interaction, and results of combining the transverse profiles of the channel. Based on the obtained results of study, an estimate of the river bed stability at the pipeline river crossing area is given

Development of Cloud-Based Microservices to Decision Support System

Intelligent systems of simulation become a key stage of the scheduling of companies and industries work. Most of the existing decision support systems are desktop software. Today there is a need to use durability, flexibility, availability and crossplatforming information technologies. The paper proposes the idea of working cloud based decision support system BPsim.Web and this one consists of some set of services and tools. The model of the multiagent resources conversion process is considered. The process of the simulation model developing via BPsim.Web is described. An example of the real process model is given. © 2020, IFIP International Federation for Information Processing.Russian Foundation for Basic Research, RFBR: 18-37-00183The reported study was funded by RFBR according to the research project № 18-37-00183

Simulation model of the realtor agency

The article describes the modeling activities of real estate agency with clients. Identified negative economic factors affecting the work of the small real estate company. The reasons to reduce the number of actual transactions in the agency. An example of creating a simulation model of organization in Arena Rockwell Software company environment. Obtained statistical data describing the economic characteristics of the company's business processes. Based on the simulation results of the experiment offered the option of improving the activity of real estate agency. Recommendations for improving the business processes of the company. The data of statistical reports proving the economic efficiency of the proposed variant optimization agencyВ статье описано моделирование деятельности агентства недвижимости с клиентами. Выявлены негативные экономические факторы, влияющие на работу малых компаний на рынке недвижимости. Определены причины сокращения количества реальных сделок в агентстве. Рассмотрен пример создания имитационной модели деятельности организации в среде Arena компании Rockwell Software. Получен статистический материал, описывающий экономические характеристики бизнес-процессов фирмы. На основе результатов имитационного эксперимента предложен вариант совершенствования деятельности агентства недвижимости. Сформулированы рекомендации по совершенствованию бизнес-процессов компании. Приведены данные статистических отчетов, подтверждающие экономическую эффективность предложенного варианта оптимизации агентств

Evaluation of the elastic properties and topography of leukocytes’ surface in patients with type 2 diabetes mellitus using atomic force microscope

The aim of study was to examine some morphometrical parameters (height, diameter) of the leukocytes (white blood cells - WBCs), their specific surface morphology (globular prominences and depression in WBCs) as well as their local elastic properties (Young’s modulus) in healthy persons and in patients with type 2 diabetes mellitus (T2DM) by means of the atomic force microscopy (AFM). Morphological and morphometrical parameters of human leukocytes were evaluated by AFM in tapped mod

Influence of ripening in mother solution on characteristics of magnesium-substituted calcium phosphate powders

Effect of ripening in the mother liquor on the degree of crystallinity and dispersity of mixed powders of calcium and magnesium phosphates is studied as a function of magnesium content with the elemental composition such that (Ca + Mg)/P = 2. Ripening is found to have a positive effect on crystallinity of the apatite phase of powders. Nanocrystals with lowered tendency to aggregation are formed during the ripening period, which affords the powders with specific surface area as high as 80 m2/g. The morphology of the constituent particles depends on the magnesium content. Crystallization processes are essentially completed by the 21st day of ripenin

Methods of the determination of inorganic arsenic species by stripping voltammetry in weakly alkaline media

Two methods are considered for the direct determination of trace amounts of As(III) and As(V) in solutions by stripping voltammetry (SVA) using an ensemble of gold microelectrodes (Au-MEA) previously developed by the authors of this paper. In both methods, analyzing a mixture of As(III) and As(V), analysts first record an SVA signal of As(III) in a supporting Na2SO3 electrolyte. To record an analytical SVA signal of As(V), in the first method one should use the reduction of As(V) to As(III) on the surface of an Au-MEA catalyzed by the system Mn(II)/Mn(0) and followed by the formation of As(0) and its anode dissolution. In the second method, the photoreduction of As(V) to As(III) in a Na2SO3 solution is conducted under UV irradiation followed by the reduction of As(III) to As(0) and its electrooxidation on Au-MEA. The two methods are compared taking into account their performance characteristics and interfering ions. To improve the reliability of the results of analysis at an insignificant increase in its cost, we propose the consecutive use of both methods. The procedures are simple and rapid, do not require the removal of dissolved oxygen or toxic reactants, and can be used for the analysis of aqueous solutions at the place of sampling. The results of analyses of real objects, snow, river water, and process solutions are presented