Ansys multiphysics simulation applying for work blade near steam extraction

В статье ставится задача применения междисциплинарного анализа при расчете околоотборных ступеней паровых турбин. На основе опубликованных работ описываются проблемы, которые необходимо решать при расчете и проектировании лопаточного аппарата. Описывается необходимость разработки унифицированной методики прочностного расчета рабочих лопаток околоотборных ступеней.The purpose of this work is ansys multiphysics simulation applying for work blade near steam extraction. The problems that must be addressed in calculation and design of blading describes on the basis of published works. The development applicability of standardized methods of work blade strength calculation is describe

Modelling fluid dynamics of turbine stages located near steam extraction

The purpose of this work is computational fluid dynamics of turbine stages № 19, 20 located near steam extraction. Design of stages model is described. The main steps of calculations and expected results are presents.Ставится задача проведения газодинамического анализа околоотборного отсека 19-20 ступеней турбины типа Т-100 производства АО «УТЗ». Описывается рассчитываемая модель околоотборного отсека с указанием зон, в которых возможно нарушение равномерного потока. Определяются основные этапы расчеты и ожидаемые результаты

New records of Holocene polar bear and walrus (Carnivora) in the Russian Arctic

This article discusses recent finds of Holocene polar bear and walrus from the northern regions of Russia. The ulna of a polar bear was found on Vaygach Island and radiocarbon dated to 1,971 +/- 25 BP (OxA-23631). This calibrates to 430-540 AD, taking into account the marine reservoir effect. The size of the bone is similar to that of a recent Ursus maritimus. The locality of the fossil bone is within the modern species range, which developed about two millennia ago. In 2014 a walrus tusk was found on the coast of New Siberia Island and is radiocarbon dated to 5,065 +/- 35 BP (GrA-62452). This calibrates to 3,510-3,370 BC, taking into account the marine reservoir effect. Its size and morphology are identical to that of an adult male of the subspecies Odobenus rosmarus laptevi. This subspecies populates the eastern parts of the Kara Sea, the entire Laptev Sea and the western parts of the East Siberian Sea. This new discovery could mean that populations of O. rosmarus laptevi inhabited the waters near the New Siberian Islands during the Middle Holocene, and that the present-day coastline of the Siberian Arctic Islands was already formed at that time

Tectonic history of the Kolyvan–Tomsk folded zone (KTFZ), Russia : insight from zircon U / Pb geochronology and Nd isotopes

The Kolyvan-Tomsk folded zone (KTFZ) represents part of the Central Asian Orogenic Belt (CAOB). The KTFZ is mainly composed of detrital Late Palaeozoic sedimentary deposits, with minor intrusions. Detrital zircon geochronology on the Upper Devonian to Lower Permian sedimentary sequences of the KTFZ and the associated Gorlovo foreland basin yields four age peaks, reflecting the magmatic events in the source terranes. These events consist of (a) a minor Neoproterozoic peak (0.9-0.7 Ga), (b) a significant Early Palaeozoic peak (550-460 Ma), with a maximum at 500 Ma, and two well-defined Late Palaeozoic peaks during (c) the Middle-Late Devonian (385-360 Ma) and (d) the Carboniferous-Early Permian (360-280 Ma), with a maximum at 320 Ma. Older zircons (>1 Ga) are quite rare in the sampled sedimentary sequences. Slightly negative epsilon Nd values and associated relatively young Nd model ages were obtained (epsilon Nd(T) = -0.78, T (DM) ~1.1 Ga for Upper Devonian sandstones, epsilon Nd(T) = -1.1, T (DM) ~1.1 Ga for Lower Permian sandstones), suggesting only minor contribution of ancient continental crust to the main sedimentary units of the KTFZ. All intrusive and volcaniclastic rocks on the contrary are characterized by high positive epsilon Nd(T) values in the range of 3.78-6.86 and a Late Precambrian model age (T (DM) = 581-916 Ma), which corroborates its juvenile nature and an important depleted mantle component in their source. The oldest unit of the KTFZ, the Bugotak volcanic complex formed at the Givetian-Early Frasnian transition, at about 380 Ma. Upper Devonian detrital deposits of the KTFZ were formed in the Early Palaeozoic accretion belt of the Siberian continent and specifically in a passive continental margin environment. Deposits of the Gorlovo foreland basin, adjoining the KTFZ, were accumulated as a result of erosion of the Carboniferous-Early Permian volcanic rocks, which are now buried under the Meso-Cenozoic sedimentary cover of the West Siberian Basin. The magmatic events, recorded in the KTFZ zircon data, correspond to the most significant magmatic stages that affected the western part of the CAOB as a whole

Recovery phase of magnetic storms induced by different interplanetary drivers

Statistical analysis of Dst behaviour during recovery phase of magnetic storms induced by different types of interplanetary drivers is made on the basis of OMNI data in period 1976-2000. We study storms induced by ICMEs (including magnetic clouds (MC) and Ejecta) and both types of compressed regions: corotating interaction regions (CIR) and Sheaths. The shortest, moderate and longest durations of recovery phase are observed in ICME-, CIR-, and Sheath-induced storms, respectively. Recovery phases of strong ($Dst_{min} < -100$ nT) magnetic storms are well approximated by hyperbolic functions $Dst(t)= a/(1+t/\tau_h)$ with constant $\tau_h$ times for all types of drivers while for moderate ($-100 < Dst_{min} < -50$ nT) storms $Dst$ profile can not be approximated by hyperbolic function with constant $\tau_h$ because hyperbolic time $\tau_h$ increases with increasing time of recovery phase. Relation between duration and value $Dst_{min}$ for storms induced by ICME and Sheath has 2 parts: $Dst_{min}$ and duration correlate at small durations while they anticorrelate at large durations.Comment: 18 pages, 4 figures, 2 tables, submitted to JGR special issue "Response of Geospace to High-Speed Streams

Stationary Flows of the Parabolic Potential Barrier in Two Dimensions

In the two-dimensional isotropic parabolic potential barrier $V(x, y)=V_0 -m\gamma^2 (x^2+y^2)/2$, though it is a model of an unstable system in quantum mechanics, we can obtain the stationary states corresponding to the real energy eigenvalue $V_0$. Further, they are infinitely degenerate. For the first few eigenstates, we will find the stationary flows round a right angle that are expressed by the complex velocity potentials $W=\pm\gamma z^2/2$.Comment: 12 pages, AmS-LaTeX, 4 figure

A commonly occurring genetic variant within the NPLOC4-TSPAN10-PDE6G gene cluster is associated with the risk of strabismus.

Strabismus refers to an abnormal alignment of the eyes leading to the loss of central binocular vision. Concomitant strabismus occurs when the angle of deviation is constant in all positions of gaze and often manifests in early childhood when it is considered to be a neurodevelopmental disorder of the visual system. As such, it is inherited as a complex genetic trait, affecting 2-4% of the population. A genome-wide association study (GWAS) for self-reported strabismus (1345 cases and 65,349 controls from UK Biobank) revealed a single genome-wide significant locus on chromosome 17q25. Approximately 20 variants across the NPLOC4-TSPAN10-PDE6G gene cluster and in almost perfect linkage disequilibrium (LD) were most strongly associated (lead variant: rs75078292, OR = 1.26, p = 2.24E-08). A recessive model provided a better fit to the data than an additive model. Association with strabismus was independent of refractive error, and the degree of association with strabismus was minimally attenuated after adjustment for amblyopia. The association with strabismus was replicated in an independent cohort of clinician-diagnosed children aged 7 years old (116 cases and 5084 controls; OR = 1.85, p = 0.009). The associated variants included 2 strong candidate causal variants predicted to have functional effects: rs6420484, which substitutes tyrosine for a conserved cysteine (C177Y) in the TSPAN10 gene, and a 4-bp deletion variant, rs397693108, predicted to cause a frameshift in TSPAN10. The population-attributable risk for the locus was approximately 8.4%, indicating an important role in conferring susceptibility to strabismus

Психологический анализ взаимосвязи монетарных установок и стратегий финансового поведения личности

The article presents study results of the relationship between monetary attitudes and strategies of a person's financial behavior. Factor analysis of the questionnaire by L. P. Tang «Money Ethic Scale» (MES) carried out on the Russian sample allowed identifying 5 agreed factors characterizing the respondent monetary attitudes: «Good», «Freedom», «Power», «Evil», «Budget». The structure of attitudes includes affective, cognitive, and behavioral components. The study reveales that Russian respondents are characterized by a contradictory and extremely emotional attitude towards money: along with the predominance of monetary values and attitude towards money as a supreme good and a symbol of freedom, at the same time there is a perception of money as an absolute evil, and a conviction of their harm to human life. The data obtained in the study indicate the prevalence of consumer, savings and debt models of financial behavior among the respondents, which can be explained by the peculiarities of the respondents' monetary attitudes among other things. The study results indicate the presence of a relationship between monetary attitudes and strategies of financial behavior, low efficiency of these strategies determined by the super emotional and irrational attitude towards money dominated in the modern Russian society. Prospects for further research are the analysis of the whole complex of factor, including individual-psychological characteristics influencing people's attitude to the material conditions of their own life and the choice of behavioral strategies in the economic sphere of life. In addition, the authors believe that to develop training and correctional programs contributed to raising the level of financial literacy, forming a rational attitude towards money, constructive strategies for financial behavior and effective economic and psychological adaptation of people in modern socio-economic conditions are promising and of practical importance.Представлены результаты исследования взаимосвязи монетарных установок и стратегий финансового поведения личности. Факторный анализ опросника Л. П. Танга «Шкала денежной этики» (Money Ethic Scale, MES) проведенный на российской выборке позволил выделить 5 согласованных факторов, характеризующих монетарные установки респондентов: «Благо», «Свобода», «Власть», «Зло», «Бюджет». В структуре установок представлены аффективные, когнитивные, поведенческие компоненты. Установлено, что российским респондентам свойственно противоречивое и крайне эмоциональное отношение к деньгам, вместе с преобладанием монетарных ценностей и отношением к деньгам как к высшему благу и символу свободы одновременно присутствует восприятие денег как абсолютного зла и убежденность в их вредности для человеческой жизни. Данные полученные в исследовании свидетельствуют о преобладании у респондентов потребительской, сберегательной и заемно-долговой моделей финансового поведения, что можно объяснить, в том числе особенностями монетарных установок опрошенных. Полученные в исследовании данные свидетельствуют о наличии взаимосвязи монетарных установок и стратегий финансового поведения, и о низкой эффективности данных стратегий детерминированных сверхэмоциональным и иррациональным отношением к деньгам, доминирующим в современном российском обществе. Перспективы дальнейших исследований видятся в анализе всего комплекса факторов, включая индивидуально-психологические характеристики, оказывающих влияние на отношение людей к материальным условиям собственной жизни и выбор поведенческих стратегий в экономической сфере жизнедеятельности. Кроме того перспективной и имеющей практическую значимость мы полагаем разработку обучающих и коррекционных программ способствующих повышению уровня финансовой грамотности, формированию рационального отношения к деньгам, конструктивных стратегий финансового поведения и эффективной экономико-психологической адаптации людей в современных социально-экономических условиях

Geoeffectiveness and efficiency of CIR, Sheath and ICME in generation of magnetic storms

We investigate relative role of various types of solar wind streams in generation of magnetic storms. On the basis of the OMNI data of interplanetary measurements for the period of 1976-2000 we analyze 798 geomagnetic storms with Dst < -50 nT and their interplanetary sources: corotating interaction regions (CIR), interplanetary CME (ICME) including magnetic clouds (MC) and Ejecta and compression regions Sheath before both types of ICME. For various types of solar wind we study following relative characteristics: occurrence rate; mass, momentum, energy and magnetic fluxes; probability of generation of magnetic storm (geoeffectiveness) and efficiency of process of this generation. Obtained results show that despite magnetic clouds have lower occurrence rate and lower efficiency than CIR and Sheath they play an essential role in generation of magnetic storms due to higher geoeffectiveness of storm generation (i.e higher probability to contain large and long-term southward IMF Bz component).Comment: 23 pages, 4 figures, 3 tables, submitted to JGR special issue "Response of Geospace to High-Speed Streams