Manufacture of desired end products by means of fine treatment of coal tar resin

The possibility of desired end product manufacture from by-product coke industry wastes is shown. A large number of valuable products can be obtained from different fractions of coal tar resin by their fine treatment. The products obtained in this way find application in medical and chemical industries and etc. Moreover, recycling of by-product coke wastes into end products solves the problem of their utilization

High-boiling components in straw oil

Investigation of straw oil and polymer quality produced in the process of its regeneration has been carried out. The conclusions about using polymers as a material for base end products are made. Flow scheme of technological treatment of straw oil wastes is suggested

Technique of complex slime water treatment of coal-mining branch

The possibility of complex slime water treatment at coal-mining and coal-treating plants producing marketable products: power-generating concentrate, coal-water fuel, magnetic fraction, industrial water is shown. A basic process flowsheet of slime water treatment presenting a united technological complex is suggested

Woe from stones: commemoration, identity politics and Estonia's 'War of Monuments'

No abstract available

Анализ эффективности вариантов выхлопного отсека паровой турбины

The results of a numerical study of the gas-dynamic and power characteristics of the exhaust compartment of low-pressure cylinder, including the last stage with a blade of 1100 mm length and the exhaust path, in terms of their interaction are presented. Numerical models of exhaust compartment variants, including steam extraction in front of last stage diaphragm, two steam suctions from the interring gap with a dehumidification chamber, above-band leakages, steam injection from the dehumidification chamber into the diffuser channel have been developed. The flow in each computational subdomain is described by the complete system of non-stationary Reynolds – Favre equations averaged by Navier – Stokes. Turbulent effects are described with the SST Menter model in the stage, and with the modified Spalart – Allmaras turbulence model in the path. The integration of system of equations was carried out using an author’s software package. The calculated subdomains were approximated by hexagonal grids. The solver used an implicit difference TVD-scheme of finite volumes of the 2nd order of accuracy based on the solution of the Riemann problem. A variant of the algorithm based on splitting the computational process for multiprocessor platforms was used in the calculation. The model of stage used an averaging the mass, momentum and energy fluxes in the circumferential direction in the interstage gap. One channel of the diaphragm with a pre-connected fragment, as well as one channel of the working ring and the flow in the branch pipe were calculated. Parameters were exchanged between the stage and the branch pipe on the basis of mass flow averaging. The calculations were based on a table model of wet steam in the approximation of equilibrium condensation. The variants of improvement of the flow part of the exhaust compartment were considered. A study of the operation of the compartment options for the nominal mode of the K-220-44-2M turbine of the Loviisa nuclear power plant was performed. The effectiveness of lowering the cap of the collecting chamber, controlling the flow using sheet ribs above the diffuser shell, expanding the collecting chamber in the plane of the horizontal connector, and ensuring the release of excess steam from the moisture removal chamber through the tangential slots in the lower half of the convex shell of the diffuser were analyzed.Представлены результаты численного исследования газодинамических и энергетических характеристик выхлопного отсека цилиндра низкого давления, включающего последнюю ступень с рабочей лопаткой длиной 1100 мм и выхлопной тракт, в условиях их взаимовлияния. Разработаны модели вариантов отсека, включающие межступенчатый зазор, отбор пара перед диафрагмой последней ступени, два отсоса пара из межвенцового зазора с камерой влагоудаления, надбандажные протечки, инжекцию пара из камеры влагоудаления в диффузор. Течение в расчетной области описывается полной системой нестационарных уравнений Навье – Стокса, осредненных по Рейнольдсу – Фавру. Турбулентные эффекты описаны на основе модели Ментера SST в ступени и модифицированной модели Спаларта – Аллмараса в тракте. Интегрирование системы уравнений осуществлялось с помощью авторского программного комплекса MTFS®. Расчетные подобласти аппроксимировались гексагональными сетками. Использовалась неявная разностная TVD-схема конечных объемов 2-го порядка точности на базе решения задачи Римана. При вычислении применяли вариант алгоритма, основанного на расщеплении вычислительного процесса для многопроцессорных платформ. Модель ступени использует осреднение потоков массы, импульса и энергии в окружном направлении в межступенчатом зазоре. Рассчитывались один канал диафрагмы с предвключенным фрагментом, а также один канал рабочего венца и течение в патрубке. Обмен параметров между ступенью и патрубком осуществлялся на основе осреднения по массовому расходу. Расчеты выполнены на базе табличной модели влажного пара в приближении равновесной конденсации. Рассмотрены направления совершенствования проточной части выхлопного отсека. Выполнено исследование работы вариантов отсека для номинального режима турбины К-220-44-2М АЭС «Ловииса». Проанализирована эффективность понижения крышки сборной камеры, управления потоком с помощью листовых ребер над обечайкой диффузора, расширения сборной камеры в плоскости горизонтального разъема, а также организации выхода избыточного пара из камеры влагоудаления через тангенциальные щели в нижней половине выпуклой оболочки диффузора

New results on the hadronic vacuum polarization to the muon g-2

Results on the lowest-order hadronic vacuum polarization contribution to the muon magnetic anomaly are presented. They are based on the latest published experimental data used as input to the dispersion integral. Thus recent results on tau to nutau pi pi0 decays from Belle and on e+ e- annihilation to pi+ pi- from BABAR and KLOE are included. The new data, together with improved isospin-breaking corrections for tau decays, result into a much better consistency among the different results. A discrepancy between the Standard Model prediction and the direct g-2 measurement is found at the level of 3 sigma.Comment: proceedings of the PhiPsi09 conference, Oct. 13-16, 2009, Beijing, Chin

Study of the process e+e−→ppˉe^+e^-\to p\bar{p} in the c.m. energy range from threshold to 2 GeV with the CMD-3 detector

Using a data sample of 6.8 pb$^{-1}$ collected with the CMD-3 detector at the VEPP-2000 $e^+e^-$ collider we select about 2700 events of the $e^+e^- \to p\bar{p}$ process and measure its cross section at 12 energy ponts with about 6\% systematic uncertainty. From the angular distribution of produced nucleons we obtain the ratio $|G_{E}/G_{M}| = 1.49 \pm 0.23 \pm 0.30$

Measurement of the Pion Form Factor in the Energy Range 1.04-1.38 GeV with the CMD-2 Detector

The cross section for the process $e^+e^-\to\pi^+\pi^-$ is measured in the c.m. energy range 1.04-1.38 GeV from 995 000 selected collinear events including 860000 $e^+e^-$ events, 82000 $\mu^+\mu^-$ events, and 33000 $\pi^+\pi^-$ events. The systematic and statistical errors of measuring the pion form factor are equal to 1.2-4.2 and 5-13%, respectively.Comment: 5 pages, 2 figure