ОПТИМИЗАЦИЯ МЕСТОРАСПОЛОЖЕНИЯ ТРАНСПОРТНО-ЛОГИСТИЧЕСКИХ ЦЕНТРОВ НА ПРИМЕРЕ РЕСПУБЛИКИ КАЗАХСТАН

Transport links largely determine the potential of a country located within the Asian region to interact with market entities beyond region’s borders. Meanwhile, transportation logistics of individual regions, territories, and countries is a complex integrated problem, whose solution is based on the approaches to fundamentals of organisation of the operation of transport infrastructure.One of the key tasks in organizing the work of the transport system of the Republic of Kazakhstan is to determine the location of the elements of its transport and logistics infrastructure. At present, theoretical and methodological approaches to solving this problem can be divided into multicriteria analysis and coordinate (gravitational method) approach.The objective of this article is to analyze the possibility of using gravitational and multicriteria methods to find the optimal location for transport and logistics centers using the example of the Republic of Kazakhstan. Based on that the research was intended as an attempt to find optimal location of transport and logistics centers in the Republic of Kazakhstan. It was clearly shown that the use of the gravitational method has constraints if not supplemented by the use of the multicriteria analysis method when solving the problem of choosing the optimal location of the transport and logistics infrastructure at the example of the Republic of Kazakhstan.Транспортные связи во многом определяют потенциал взаимодействия страны внутри азиатского региона с субъектами рынка за его пределами. При этом транспортное обеспечение отдельных регионов, территорий, стран является сложной комплексной задачей, в основе решения которой лежат подходы к фундаментальным проблемам организации работы транспортной инфраструктуры.Одной из ключевых задач организации работы транспортной системы Республики Казахстан является определение места расположения элементов её транспортно-логистической инфраструктуры. В настоящее время теоретико-методологические подходы к решению данной проблемы можно укрупнённо разделить на многокритериальный анализ и координатный (метод гравитации) подход.Целью данной статьи является анализ возможности применения гравитационного и многокритериального методов для поиска оптимального места размещения транспортно-логистических центров на примере Республики Казахстан.На их основе предпринята попытка нахождения мест оптимального расположения транспортно-логистических центров в Республике Казахстан. Наглядно показана ограниченность применения метода гравитации без его дополнения методом многокритериального анализа при решении этой задачи

Perspective social work technologies with young people in modern conditions

В статье рассматриваются основные положения развития перспективных технологий социальной работы с молодежью с учетом современных тенденций; в качестве перспективных технологий социальной работы с молодежью определены технологии развития социального здоровья, представлены группы данных технологий и исследовательские направления.The article examines the main provisions of the development of perspective technologies of social work with youth with current trends and promising technologies of social work with youth identified technology development, social health, presented the group of the technologies and research directions

Genetic diversity of the Russian sunflower breeding lines revealed by microsatellite loci analysis

The breeding of high-yielding sunflower varieties and hybrids requires the use of parent material with considerable genetic diversity. It can be identified using molecular genetic markers. The purpose of this study was the genotyping of sunflower lines bred by V. S. Pustovoit All-Russian Research Institute of Oil Crops (VNIIMK), developed in different ecological areas of cultivation, and to evaluate their genetic diversity using microsatellite loci. For the studies conducted in 2020-2022, there were used 23 lines from the Central experimental base (СEB), 17 lines from L.A. Zhdanov Don experimental station (DES), and 10 lines from the Armavir experimental station (AES). DNA was isolated from seedlings by the CTAB method. Samples were genotyped using 12 SSR markers. PCR products were separated in 8 % denaturing polyacrylamide gel or by capillary electrophoresis in a genetic analyzer. The main indicators of genetic diversity for all collections did not differ significantly from each other, and were moderate and increased in the collections of VNIIMK: AES – DES – CEB -the joint collection. In total there have been identified 37 alleles, an average 3.083 alleles per locus. The effective number of alleles ranged from 1.094 to 3.290 with an average value of 2.154. The values of the polymorphic information content (PIC) index ranged from 0.084 to 0.651, with an average of 0.434. The values of observed and expected heterozygosity ranged from zero to 0.071, 0.030, on average, and from 0.086 to 0.696, 0.500, on average, respectively. The number of shared alleles between different collections was 23. Molecular variation analysis revealed that most of the total variance (91 %) was due to differences between lines within each collection and 3 % to differences between collections. According to the results of the cluster analysis, the maternal lines from the collections of the CEB, DES, and AES of VNIIMK were mostly grouped into a cluster or subcluster separate from the paternal ones. The obtained results indicate a moderate genetic diversity of the studied sunflower lines of the breeding of VNIIMK and the existence of small differences between the collections

Dentes Verdes: a Propósito de Três Casos Clínicos

info:eu-repo/semantics/publishedVersio

Research on zinc concentrate dressing at the zhezkent processing plant to obtain conditioned concentrate

The article investigates dressing of zinc concentrate of Zhezkent processing plant with the purpose of receiving conditioned zinc concentrate and copper product output. The scheme of the zinc concentrate ressing is suggested which includes the following operations: desorption of the initial concentrate by sodium sulfide and activated carbon; preliminary hydraulic classification (washing of thin sludge) complicating the flotation process; comminution of the concentrate in a ball mill up to the size of 96 %, class - 0,044 mm; flotation of copper minerals by reagents: xanthate, Methyl isobutyl ketone blowing agent, and depressors (Na2S, FeSO4, ZnSO4). The proposed dressing scheme provides obtaining conditioned zinc concentrate of grade KC-3 with Zn 47,0 %, and Cu 1,9 %

Research of kinetics of zinc leaching with sulfuric acid from smithsonite

The study investigates the kinetics of zinc leaching from smithsonite with sulfuric acid in order to expand the zinc production feedstocks. The recovery rate of zinc from smithsonite into water-soluble zinc sulfate was found at different leaching time and temperature. Sulfuric acid concentration, its consumption and smithsonite particles size selected in this work for leaching of zinc from this mineral using the indicated solution allowed to determine the magnitude of “apparent” activation energy of the smithsonite reaction with the indicated acid, equal to 2,633 kJ / mol. The calculated value of E, shows that the process investigated is accompanied by diffusion phenomena

Research of kinetics of zinc leaching with sulfuric acid from smithsonite

The study investigates the kinetics of zinc leaching from smithsonite with sulfuric acid in order to expand the zinc production feedstocks. The recovery rate of zinc from smithsonite into water-soluble zinc sulfate was found at different leaching time and temperature. Sulfuric acid concentration, its consumption and smithsonite particles size selected in this work for leaching of zinc from this mineral using the indicated solution allowed to determine the magnitude of “apparent” activation energy of the smithsonite reaction with the indicated acid, equal to 2,633 kJ / mol. The calculated value of E, shows that the process investigated is accompanied by diffusion phenomena

Development of an advanced water filtering system based on graphene irradiated by gas cluster and highly charged ions

Effects of a heavy low energy ion bombardment of various materials are explored for the purposes of creating new materials that have advanced properties. In this study, features of the defects’ formation in the samples of graphene, graphene oxide and silicon by Ar cluster ions irradiation are given..

Investigation of the kinetics of sulphuric acid leaching of zinc from calamine

This article aims at the research of kinetics of the sulphuric acid leaching of zinc from calamine (hemimorphite) of Shaimerden deposits. The ratio of zinc extraction from calamine to water-soluble zinc sulphate was determined at various leaching durations and its temperatures. The concentration of the sulfuric acid solution, the flow rate of this solution and the size of the calamine particles, selected in the course of this work for leaching zinc from this mineral with the specified solution, made it possible to establish the value of the “apparent” activation energy of the reaction of calamine with sulfuric acid, amounting to 3,075 kJ / mol