Corrosion resistance of neodymium and dysprosium hydrides

This paper describes the methods of obtaining hydrides of rare earth elements such as dysprosium and neodymium. The properties and corrosion resistance of these elements are investigated. A synthesis method of monophasic dysprosium and neodymium dihydrides is presented. Synthesized dihydrides are agglomerates with an average size of 3-50 µm and are formed by crystalline grains of a nanometer size. BET specific surface area, morphology, elemental analyses and composition of samples have been studied. Corrosion stability in aqueous solutions of hydrochloric acid and sodium hydroxide were studied. It was determined that both hydrides undergo hydrolysis in acid and alkaline mediums. Neodymium hydride is more stable to corrosion than dysprosium hydride, which is proved by its longer exposure to aggressive medium to hydrides. The formation of insoluble /poorly soluble products of corrosion can make a significant contribution to the process of powder dissolution

Hydride-dehydride fine zirconium powders for pyrotechnics

In this paper, the possibility of obtaining fine zirconium powders by the hydrogenationdehydrogenation method is studied. The main parameters of the technological process that allow obtaining fine zirconium powders for pyrotechnics are determined. Hydrogenation and dehydrogenation of the samples are carried out in a rotating quartz tube placed in a furnace at temperatures of 380◦C and 850◦C, respectively. Zirconium hydride is milled using tungsten carbide balls to eliminate the presence of impurities. Thus it is possible to obtain a fine zirconium powder with a number-average particle size of 4.527 +- 2.650 Um and a specific surface area of 0.231 m2/g from the initial electrolytic zirconium powder with a number-average particle size of 220 Um and a specific surface area < 0.1 m2/g. The allowed relative error of measuring the specific surface area is +- 5%. Hence it is possible to reduce the particle size of zirconium powder by 54.6 times without changing the composition

Increasing Availability of the International Normalized Ratio Control in Russia

Background: Warfarin is still, in some cases, the only medication to prevent thromboembolic complications. Warfarin intake imposes regular INR monitoring, which can be performed domiciliary. Currently, in the Russian market, there are two models of automatic portable blood coagulometers: CoaguChek XS (Germany) and qLabs ElectroMeter (China). The main problem of portable coagulometers is their high cost and high cost of operation, which the majority of patients cannot afford. To explore the demand for development of a Russian coagulometer with a more affordable price, a questionnaire survey was carried out among the patients who needed this device. Methods and Results: We surveyed 70 patients taking Warfarin, with 5 years duration paroxysmal, persistent/or stable AF of nonvalvular etiology, having >2 CHADS-VASc score for thrombembolia risk assessment and <3 HAS-BLED score for hemorrhage risk assessment. According to the survey results, 7 (10%) patients had portable coagulometers, including 3 persons with CoaguChek XS and 4 persons with Micropoint qLabs ElectroMeter. Among these patients, there were 4 persons who continued regular INR monitoring domiciliary, while 3 patients had financial difficulties in getting testing strips. At the same time, 14 (20%) patients were not aware of the possibility of domiciliary INR monitoring. As it turned out, those patients who received regular INR monitoring domiciliary with a portable coagulometer, or at their local polyclinics, had neither ischemic strokes nor hemorrhages within a period of five years. Conclusion: It is critical to develop and manufacture a domestic equivalent of a portable coagulometer and testing strips for household use at a more affordable price

Неконструктивные формы поведения младших школьников с синдромом дефицита внимания с гиперактивностью

The article is devoted to the study of the prevailing forms of disruptivebehavior, characteristic of younger students with attention deYcit and hyperactivity&nbsp;disorder (ADHD). In studies of domestic and foreign psychologists found no speciYc&nbsp;data on the prevailing forms of disruptive behavior of pupils and the nature of the&nbsp;inZuence of non-constructive behavior in the emergence of negative psychologicalconsequences.&nbsp;To study the prevailing forms of disruptive behavior of younger schoolchildren&nbsp;with ADHD, to determine their intensity in the general behavioral repertoire and&nbsp;dynamics throughout primary school used the technique “Expertise in the behavior&nbsp;of the intensity of aggression” (M. E. Weiner) and the projective technique “test ofhand” (Hand-test). In a comparative study involved 50 elementary school children&nbsp;diagnosed with ADHD and the same number of peers who do not have deviations in&nbsp;mental development. Particular attention was drawn to the presence in behavioral&nbsp;repertoire of younger students in both categories aggressive manifestations.&nbsp;The results revealed the dominant forms of disruptive behavior, reliably recorded&nbsp;by elementary school students with ADHD – namely, hyperactive, and deYant protestbehavior. Among the negative consequences associated with these behaviors most&nbsp;of the studied throughout primary school decreased productivity on employment&nbsp;and deteriorating relationships with adults and peers. It is shown that aggressive&nbsp;behavior of students in grades 1–4 with ADHD is not a distinct form of disruptive&nbsp;behavior. Draw the conclusion about the necessity of psychological intervention tocorrect non-constructive behavior of young schoolchildren with ADHD.Статья посвящена вопросу изучения преобладающих форм неконструктивного поведения, характерных для младших школьников с синдромом дефицита внимания и гиперактивностью (СДВГ). В исследованиях отечественных и зарубежных психологов не обнаружено специальных данных о доминирующих формах неконструктивного поведения этих школьников&nbsp; и характере влияния неконструктивных форм поведения на появление негативных психологических последствий. Для&nbsp;изучения&nbsp;преобладающих&nbsp;форм&nbsp;неконструктивного&nbsp;поведения&nbsp;младших школьников с СДВГ, определения их интенсивности в общем поведенческом репертуаре и динамики на протяжении обучения в начальной школе использовалась методика «Экспертная оценка интенсивности агрессии в поведении» (М. Э. Вайнер) и проективная методика «Тест руки» (Hand-test). В сравнительном исследовании принимали участие 49 младших школьников, имеющих диагноз СДВГ, и 50 сверстников, не имеющих отклонений в психическом развитии. Особое внимание при этом было обращено на присутствие в поведенческом репертуаре младших школьников обеих категорий агрессивных проявлений. Полученные результаты позволили выявить доминирующие формы неконструктивного поведения, достоверно фиксируемые у учащихся начальной школы с СДВГ, а именно – гиперактивное, демонстративное и протестное поведение. Среди негативных последствий, связанных с указанными формами поведения, наиболее часто из изучаемых на протяжении обучения в началь-&nbsp;ной школе отмечены снижение продуктивности на занятиях и ухудшение взаимоотношений с взрослыми и сверстниками. Показано, что проявление агрессивного поведения у учащихся 1–4 классов с СДВГ не является ярко выраженной формой неконструктивного поведения. Сделаны заключения&nbsp;о&nbsp;необходимом психологическом вмешательстве с целью коррекции неконструктивных форм поведения младших школьников с СДВГ

Experimental and Traceological Studying the Use Of Stone Tools in Blacksmiths Work

The article presents results of experimental studying the use of stone tools in blacksmiths work. This research has contained thorough examination of problem of their efficacy in work with metal. Authors have compared measures of exposures on working material of stone tools with metal ones. The main part of the studying became use-wear analysis of peculiarities of traces formation on experimental patterns. It has allowed distinguishing types of use wear-traces for iron, copper and operations of their treatment. These results are very important for future differentiation of functions of archaeological artifacts. Moreover they significantly increase set of stone tools of latest times available for traceological determinations and thus open new perspectives for studying technologies of metal working on Siberia territory in Iron Age.Статья представляет результаты экспериментального изучения использования каменных орудий в кузнечном деле. В частности авторами были исследованы проблема эффективности и меры воздействия каменных орудий на обрабатываемый материал, в сравнении с традиционным набором металлических инструментов, а также особенности следообразования в результате выполнения различных операций по обработке холодных и горячих металлов. Выделенные в ходе исследования типы следов износа для железа, меди и операций процесса их обработки позволяют выявлять функции археологических артефактов более дифференцированно. Это значительно увеличивает набор каменных орудий поздних эпох, доступных трасологическим определениям, и таким образом, открывает новые перспективы для изучения технологий металлообработки на территории Сибири в эпоху железа

Research of formation plasma-chemical process particles of oxides metals with specified morphology

The results of studies to determine the parameters affecting the morphology of the particle formation in certain conditions plasma chemical synthesis are present. On the example of oxides of cerium and yttrium were determined kinetic characteristics of plasmachemical process for their preparation, calculated characteristic times of the main stages occurring in the plasma-chemical reactor (t1, t2, t3, t4). Have been proposed parameter K0, characterizing the modes of hollow and solid particles formation and determining the process of salt diffusion in the droplet volume and solvent evaporate from the surface.</jats:p

Pilot program for optimizing parenting motivation

Background. The interest in childhood as a period of human life and in children as members of society is determined by negative transformations of the sociocultural development observed in the period starting with 70-80s of the 20th century to the present day. The Objective of the paper is to describe the pilot research for optimizing parenting motivation as part of personal education. The basic hypothesis of the research is the assumption about the objective dependence of parenting motivation on the system of value orientations and attitudes of the subject, including the perceived necessity for the child upbringing. Progress Report. The first stage of the research includes the analysis of foreign and domestic scientists’ works of in the field of psychology of parenting, which allowed to shape the research hypothesis and to design the experimental part. The second stage is the implementation of the experimental research program. Respondents of the research were represented by males and females aged 16 to 22 years. Research Results. The quantitative and qualitative analysis of the experimental data carried out at the third stage showed that 73 per cent of the respondents pointed to the family as the most important value. The central motivation for child birth in the majority of respondents (84 per cent) is receiving baby love. Conclusion. The conducted research showed that parenting motivation is well-developed in the respondents. The hypothesis about the distinctive features of parenting motivation at the stages of early and late adolescence, and also the hypothesis of the gender specificity of parenting motivation have also been confirmed. Similarly, the qualitative analysis of the experimental data that has been performed in the research reveals the maximum intensity of the emotional component of parenting motivation. The cognitive component that objectively determines the stability of motivation is weakly expressed. To develop the parenting motivation as part of personal education the program aimed at harmonizing the development process of both emotional and cognitive component of parenting motivation was organized