Measurement of local mechanical characteristics of marble by broadband ultrasonic structuroscopy

The internal structure of marble is investigated. A precise measurement of the speeds of longitudinal and moving waves in marble samples. The internal structure of samples is visualised and localised microcracks. The geometric sizes of the microcracks are determined. Using the obtained velocity values, the Young's modulus and porosity were calculated. According to the research and calculations, the effectiveness of using marble as a facing stone in urban and industrial areas was made

Fast visible imaging of turbulent plasma in TORPEX

Fast framing cameras constitute an important recent diagnostic development aimed at monitoring light emission from magnetically confined plasmas, and are now commonly used to study turbulence in plasmas. In the TORPEX toroidal device [A. Fasoli et al., Phys. Plasmas 13, 055902 (2006)], low frequency electrostatic fluctuations associated with drift-interchange waves are routinely measured by means of extensive sets of Langmuir probes. A Photron Ultima APX-RS fast framing camera has recently been acquired to complement Langmuir probe measurements, which allows comparing statistical and spectral properties of visible light and electrostatic fluctuations. A direct imaging system has been developed, which allows viewing the light, emitted from microwave-produced plasmas tangentially and perpendicularly to the toroidal direction. The comparison of the probability density function, power spectral density, and autoconditional average of the camera data to those obtained using a multiple head electrostatic probe covering the plasma cross section shows reasonable agreement in the case of perpendicular view and in the plasma region where interchange modes dominate.This work is partly funded by the “Fonds National Suisse de la Recherche Scientifique.

Mathematical modelling of the spatial network of bone implants obtained by 3D-prototyping

In this paper, the mathematical model suitable for bone implants 3D-prototyping is proposed. The composite material with the spatial configuration of reinforcement with matrix of hydroxyapatite and titanium alloys fibers is considered. An octahedral cell is chosen as an elementary volume. The distribution of reinforcing fibers is described by textural parameters. Textural parameters are integrated characteristics that summarize information on the direction of reinforcing fibers and their volume fractions. Textural parameters, properties of matrix and reinforcing fibers allow calculating effective physical and mechanical properties of the composite material. The impact of height and width of the octahedral reinforcement cells on textural parameters of the composite material is investigated in this work. The impact of radius of fibers is also analyzed. It is shown that the composite becomes quasi-isotropic under certain geometrical parameters of cell. © 2016 Author(s)

Feedbacks in Non-equilibrium Oxidative Plasma Reacting with Polyethylene

The experimental results on studies of loading effect at the action of a glow DC discharge in oxygen and air on polyethylene film are presented. At the increase in a polymer amount under a treatment the specific rates of etching and CO2, CO, H2O, H2 product formation rates are decreased. The gas temperature is changed slightly. The reduced electric field strength is increased in oxygen plasma and decreased in air plasma

The T-100-12.8 family of cogeneration steam turbines: Yesterday, today, and tomorrow

The T-100-12.8 turbine and its versions, a type of cogeneration steam turbines that is among best known, unique, and most widely used ones in Russia and abroad, are considered. A list of turbine design versions and quantities in which they were produced, their technical and economic indicators, design features, schematic solutions used in different design versions, and a list of solutions available in a comprehensive portfolio offered for modernizing type T-100-12.8 turbines are presented. Information about amounts in which turbines of the last version are supplied currently and supposed to be supplied soon is given. © 2013 Pleiades Publishing, Ltd

Experience gained at the Ural Turbine Works with retrofitting steam turbine units for thermal power stations

Examples of projects on retrofitting, modernizing, and renovating steam turbine units at thermal power stations implemented with participation of the Ural Turbine Works are given. Advanced construction and layout solutions were used in implementing these projects both on the territory of Russia and abroad. © 2013 Pleiades Publishing, Ltd

The forecast of development of small business in Yekaterinburg till 2018 year

In article is considered the problem of development of small business in Yekaterinburg during crisis. Small business has a big social and economic influence for a development of the city. It is possible to consider current state of the sphere of small business during the analysis of various demographic, economic, political characteristics, and also statistical data. Three scenarios of development of small business in Yekaterinburg have been made by means of a combination of heuristic and mathematical methods of forecasting for the next two years.В статье рассматривается проблема развития малого предпринимательства в Екатеринбурге в период кризиса. Малый бизнес имеет большое социальное и экономического значение для развития города. В ходе анализа различных демографических, экономических, политических характеристик, а также статистических данных можно рассмотреть текущее состояние сферы малого бизнеса. С помощью комбинирования эвристических и математических методов прогнозирования были составлены три сценария развития малого бизнеса в Екатеринбурге на ближайшие два года

Графика «московского полуустава»: историографические заметки

There is analyzed the problem of theoretical understanding of the “Moskovian Poluustav” in the Russian historiography. This term began to be used by specialists in the area of Old Russian manuscripts sporadically yet in the first half of the 20th century, for example by V.N. Shchepkin, and was finally established through the influence of one of the most popular and authoritative textbooks on paleography by M.N. Tikhomirov. There are discussed the works of L.M. Kostyukhina, A.A. Turilov and M.G. Galchenko, which address theoretical issues of the evolution of Poluustav in the Old Russian manuscripts.As a result of historiographical analysis, there is made conclusion on the absence of clear definition for the term “Moskovian poluustav” in the domestic palaeographic science. Recently the researchers, dedicated to the graphic-orthographic features of the Russian medieval script, as well as the authors of several textbooks and manuals on palaeography, try not to use this term at all.In the opinion of the author, the most perspective approach to form this definition is to comparatively analyze correlation of the script graphics of the Old Russian manuscripts and the early printed book fonts of the middle of the 16th century. Поднимается проблема теоретического осмысления «московского полуустава» в отечественной историографии. Этот термин стал использоваться специалистами по древнерусским рукописям спорадически еще в перовой половине XX в., в частности В.Н. Щепкиным, и окончательно закрепился благодаря одному из самых популярных и авторитетных учебников по палеографии, выпущенных под редакцией М.Н. Тихомирова. Проанализированы работы Л.М. Костюхиной, А.А. Турилова, М.Г. Гальченко, в которых затрагиваются теоретические проблемы эволюции полуустава в древнерусских рукописях. В результате историографического разбора сделан вывод, что к настоящему моменту так и не сложилось в отечественной палеографической науке четких дефиниций такому явлению, как «московский полуустав». В последнее время исследователи, специально занимающиеся графико- орфографическими особенностями русского средневекового письма, а также авторы ряда учебников и пособий по палеографии стараются вообще не употреблять этот термин. Полагаем, что наиболее перспективным в прояснении вопроса о том, что такое «московский полуустав», является подход, в котором будет реализовано соотнесение графики древнерусских рукописей со старопечатными шрифтами середины XVI века.