Electromagnetic torque of valve engine with nonmagnetic anchor

Получены расчетные соотношения электромагнитной момента секции вентильного двигателя с немагнитным якорем на интервале коммутации и определено ее общее выражение при 120-градусном законе коммутации. Произведена оценка пульсаций электромагнитного момента, обусловленных дискретной коммутацией секций якорной обмотки.The ratios for the electromagnetic moment calculation on the switching period in the section of the BLDC with a non-magnetic armature are obtained and general expression of the electromagnetic force at 120-degree switching law is determined. The estimation of the electromagnetic force ripple caused by discrete switching in the armature winding sections is performed

Histochemical evaluation of protein oxidative modification in fibrinoid of the placenta, depending on calcium deposits, combined with iron deficiency anemia of pregnancy

Introduction. Both calcium and iron significantly affect the level of free radical processes. The aim of the study was to determine the levels of protein oxidative modification in fibrinoid of placenta of different localization areas, depending on the variants of calcium deposits, based on histochemical methods of bromophenol blue staining of proteins into „acidic“ and „basic“ by Mikel Calvo with quantitative assessment of results by means of computed microspectrophotometry. Materials and methods. 164 cases of placental calcification, including 84 cases of iron deficiency anemia in pregnancy (IDAP) and 80 cases of pregnancy without anemia, were studied. Histochemical method of bromophenol blue into „acidic“ and „basic“ proteins by Mikel Calvo with the quantitative assessment of the staining results was performed by use of computed microspectrophotometry on the digital copy of the image with the fibrinoid areas in the computed program „ImageJ“. Results. The differences between the average indicator R/B, which is the measure of protein oxidative modification, were discovered both in fibrinoid as a part of the chorionic tree and in the basal plate of the placenta in particular types of calcium deposits. Conclusion. According to the histochemical study, pregnancies with iron deficiency anemia were characterized by fibrinoid with deposits of calcium type II and type IV (fine-granular deposits) both in chorial tree and in the basal plate of the placenta, where the protein oxidative modification processes increase compared to those without anemia

Noils of flax fiber as an aggregate for heat-insulating plates

Heat-insulating materials on the basis of flax fiber are considered. It was offered to use waste of flaxprocessing plants – noils flax fiber as a fibrous aggregate for production of a heater. The results of the carriedout testing testify greater efficiency of heat-insulating materials from noils fiber in comparison with heaters on the basis of flax fibers

Noils of flax fiber as an aggregate for heat-insulating plates

Heat-insulating materials on the basis of flax fiber are considered. It was offered to use waste of flaxprocessing plants – noils flax fiber as a fibrous aggregate for production of a heater. The results of the carriedout testing testify greater efficiency of heat-insulating materials from noils fiber in comparison with heaters on the basis of flax fibers

A new accuracy measure based on bounded relative error for time series forecasting

Many accuracy measures have been proposed in the past for time series forecasting comparisons. However, many of these measures suffer from one or more issues such as poor resistance to outliers and scale dependence. In this paper, while summarising commonly used accuracy measures, a special review is made on the symmetric mean absolute percentage error. Moreover, a new accuracy measure called the Unscaled Mean Bounded Relative Absolute Error (UMBRAE), which combines the best features of various alternative measures, is proposed to address the common issues of existing measures. A comparative evaluation on the proposed and related measures has been made with both synthetic and real-world data. The results indicate that the proposed measure, with user selectable benchmark, performs as well as or better than other measures on selected criteria. Though it has been commonly accepted that there is no single best accuracy measure, we suggest that UMBRAE could be a good choice to evaluate forecasting methods, especially for cases where measures based on geometric mean of relative errors, such as the geometric mean relative absolute error, are preferred

Uniparental Genetic Heritage of Belarusians: Encounter of Rare Middle Eastern Matrilineages with a Central European Mitochondrial DNA Pool

Ethnic Belarusians make up more than 80% of the nine and half million people inhabiting the Republic of Belarus. Belarusians together with Ukrainians and Russians represent the East Slavic linguistic group, largest both in numbers and territory, inhabiting East Europe alongside Baltic-, Finno-Permic- and Turkic-speaking people. Till date, only a limited number of low resolution genetic studies have been performed on this population. Therefore, with the phylogeographic analysis of 565 Y-chromosomes and 267 mitochondrial DNAs from six well covered geographic sub-regions of Belarus we strove to complement the existing genetic profile of eastern Europeans. Our results reveal that around 80% of the paternal Belarusian gene pool is composed of R1a, I2a and N1c Y-chromosome haplogroups – a profile which is very similar to the two other eastern European populations – Ukrainians and Russians. The maternal Belarusian gene pool encompasses a full range of West Eurasian haplogroups and agrees well with the genetic structure of central-east European populations. Our data attest that latitudinal gradients characterize the variation of the uniparentally transmitted gene pools of modern Belarusians. In particular, the Y-chromosome reflects movements of people in central-east Europe, starting probably as early as the beginning of the Holocene. Furthermore, the matrilineal legacy of Belarusians retains two rare mitochondrial DNA haplogroups, N1a3 and N3, whose phylogeographies were explored in detail after de novo sequencing of 20 and 13 complete mitogenomes, respectively, from all over Eurasia. Our phylogeographic analyses reveal that two mitochondrial DNA lineages, N3 and N1a3, both of Middle Eastern origin, might mark distinct events of matrilineal gene flow to Europe: during the mid-Holocene period and around the Pleistocene-Holocene transition, respectively

Macro-financial linkages and bank behaviour: evidence from the second-round effects of the global financial crisis on East Asia

This paper studies the link between macro-financial variability and bank behaviour, which justifies the second-round effects of the global financial crisis on East Asia. Following Gallego et al. (The impact of the global economic and financial crisis on Central Eastern and South Eastern Europe (CESEE) and Latin America, 2010), the second round effects are defined as the adverse feedback loop from the slumps in economic activities and sharp financial market deterioration, which may influence the financial performance of bank, inter alia via deteriorating credit quality, declining profitability and increasing problems in retaining necessary capitalization. Differentiating itself from other research, this study stresses adjustments in four dimensions of bank performance and behaviour: asset quality, profitability, capital adequacy, and lending behaviour, assuming that any change in a bank-specific characteristic is induced by endogenous adjustments of the others. The empirical results based on partial adjustment models and two-step system GMM estimation show that bank’s adjustment behaviour is subject to the variation in the macro-financial environment and the stress condition in the global financial market. There is no convincing evidence to support the effectiveness of policy rate cut to boots bank lending and to avoid a financial accelerator effect

Sustainment of High-Beta Mirror Plasma by Neutral Beams

The report presents two experiments carried out in Budker Institute for obtaining the maximum plasma beta (ratio of the plasma pressure to magnetic field pressure) in axially symmetric magnetic field. The experiments are based on injection of powerful focused neutral beams with high neutral power density in the plasma. The produced fast ion population significantly increases the plasma pressure. It the axially symmetric GDT experiment (Gas Dynamic Trap) the plasma beta exceeded 0.6 at the fast ion turning points. The CAT experiment (Compact Axisymmetric Toroid) is being prepared for obtaining a plasmoid with extremely high diamagnetism in axially symmetric magnetic field. Reversal of magnetic field in the plasmoid is possible in this experiment

Науковий доробок професора Д. Ф. Лихваря з селекції та насінництва сільськогосподарських рослин

В статті методами історико-наукового, джерелознавчого й архівознавчого аналізу розглянуто результати наукових досліджень Д.Ф. Лихваря з селекції та насінництва сільськогосподарських рослин. Шляхом розширення генофонду культур і застосування методів створення генетичних мутацій Д.Ф. Лихвар вивів селекцію на новий рівень, ініціював започаткування школи підготовки кадрів за профілем генетики і цитології та створення лабораторії генетики в Українському науково-дослідному інституті землеробства