Effective lining of tunnel kiln cars made of aluminosilicate ceramoconcrete

Aluminosilicate ceramoconcrete lining for cars used in ceramic plant firing kilns was developed and introduced. The first cars with this lining have already operated for more than 50 cyclesyesBelgorod State Universit

Nitric oxide, cell multiplication, and cell survival

Arrest of cell division is crucial for cells to enter a program of terminal differentiation. In the developing organ or a differentiating tissue, growth arrest defines roughly the size of the cellular population that is further committed to become a domain of differentiated cells. Eventually, the balance between the number of cell divisions and the extent of subsequent programmed cell death determines the final size of a domain, a tissue, or an organ (for review, see Bryant and Simpson 1984; Raff 1992, 1996). Mitogenesis, cytostasis, and survival of neuronal cells can be induced and maintained by the same or by different growth or trophic factors. The signaling pathways that coordinate proliferation, growth arrest, and survival of cells and groups of cells in developing organisms are not known, but they probably involve as yet undetermined inter- and intra-cellular second messenger molecules

ПРОБЛЕМЫ ДЕМОГРАФИЧЕСКОЙ СИТУАЦИИ В РОССИИ

The main demographics credentials which forming the country’s demographic situation are analysed in this paper. The emphasis is on the analysis of a demographic setting in Russia under conditions of demographic crisis. A certain place in this paper is occupied by the description of a mode of reproduction of the population of Russia depending on two components: natural and migratory population movement interrelating with the social and economic processes proceeding in modern society. The values of gross and net reproduction rate for the Federal Districts of the country are reproduced. This article also presents the results of forecasts of the population performed by the Federal Service of State Statistics and Institute of Demography: National Research University Higher School of Economics till 2025; the evolving negative effects are stated as the indication of the next phase of demographic crisis.В статье анализируется основные демографические характеристики, формирующие демографическую ситуацию в стране. Основное внимание уделяется анализу демографической обстановки в России в условиях демографического кризиса. Определённое место в статье занимает описание режима воспроизводства населения России, зависящего от двух составляющих: естественного и миграционного движения населения, находящихся во взаимосвязи с социально-экономическими процессами, протекающими в современном обществе. Приводятся значения брутто и нетто-коэффициентов воспроизводства населения по Федеральным округам страны. Рассматриваются также результаты прогнозов населения, выполненных Росстатом и Институтом демографии НИУ Высшая школа экономики до 2025 года, формулируются складывающиеся негативные последствия, как проявление следующей фазы демографического кризиса

The results of treatment of femoral diaphysis fractures using locked intramedullary osteosynthesis and extramedullary osteosynthesis (results for 10 years)

Background. Femoral diaphysis fractures are one of the most common and significant injuries to the bones of the limbs. Locked intramedullary osteosynthesis makes it possible to reduce the injury rate of the surgery and its length, as well as to carry out early rehabilitation of patients. The aim of the study. To conduct a continuous retrospective single-purpose comparative study of  the results of treatment of patients with femoral diaphysis fractures treated with locked intramedullary osteosynthesis and extramedullary osteosynthesis for 10 years. This study did not include patients with double femoral fractures treated by osteosynthesis using a combination of two implants – locked intramedullary implant and extramedullary implant. Material and methods. We conducted a retrospective study of the results of treatment of patients from 2011 to 2020. During this period, we treated 794 patients aged from 16 to 77 years with femoral diaphysis fractures. The share of people of working age was 75 %. The patients were divided into two groups depending on the method of surgical treatment. Group 1 included 500 patients who had surgical treatment using locked intramedullary osteosynthesis. Group 2 included 294 patients who had surgical treatment using extramedullary osteosynthesis. Results. In patients of group 1 treated with locked intramedullary osteosynthesis, good anatomical and functional treatment results were achieved in 70 % of cases; satisfactory treatment results – in 25.2 % of cases, unsatisfactory results – in 4.8 %. In the group 2, good results were achieved in 61.9 % of cases, satisfactory – in 29.6 %, unsatisfactory – in 8.5 %. Conclusion. The obtained results of treatment of femoral diaphysis fractures show the undeniable advantage of using locked intramedullary osteosynthesis compared to extramedullary osteosynthesis

Off-limb EUV observations of the solar corona and transients with the CORONAS-F/SPIRIT telescope-coronagraph

The SPIRIT telescope aboard the CORONAS-F satellite (in orbit from 26 July 2001 to 5 December 2005), observed the off-limb solar corona in the 175 Å (Fe IX, X and XI lines) and 304 Å (He II and Si XI lines) bands. In the coronagraphic mode the mirror was tilted to image the corona at the distance of 1.1...5 <I>R</I><sub>sun</sub> from the solar center, the outer occulter blocked the disk radiation and the detector sensitivity was enhanced. This intermediate region between the fields of view of ordinary extreme-ultraviolet (EUV) telescopes and most of the white-light (WL) coronagraphs is responsible for forming the streamer belt, acceleration of ejected matter and emergence of slow and fast solar wind. We present here the results of continuous coronagraphic EUV observations of the solar corona carried out during two weeks in June and December 2002. The images showed a "diffuse" (unresolved) component of the corona seen in both bands, and non-radial, ray-like structures seen only in the 175 Å band, which can be associated with a streamer base. The correlations between latitudinal distributions of the EUV brightness in the corona and at the limb were found to be high in 304 Å at all distances and in 175 Å only below 1.5 <I>R</I><sub>sun</sub>. The temporal correlation of the coronal brightness along the west radial line, with the brightness at the underlying limb region was significant in both bands, independent of the distance. On 2 February 2003 SPIRIT observed an expansion of a transient associated with a prominence eruption seen only in the 304 Å band. The SPIRIT data have been compared with the corresponding data of the SOHO LASCO, EIT and UVCS instruments

Low-cement refractory concretes of aluminum silicate composition based on submicron aluminum oxide grade NK-Alumina 14

Properties are provided for submicron aluminum oxide developed in SAO PKF NK for low-cement refractory concretes, and also for the LCRC of aluminosilicate composition obtained. It is demonstrated that the properties of concretes prepared on the basis of the alumina developed are no worse than domestic and imported analog

DETERMINANTS AND MODERN PECULIARITIES OF LABOR MIGRATION OF RURAL YOUTH

The problems of rural youth and the state of the information base in the field of state youth policy have been considered. A significant problem of the state youth policy is the lack of a system of analysis and social monitoring of the state of the youth environment. A sample survey has shown high labor mobility of the young rural population of the agrarian republic. It has been installed, that the large-scale outflow of rural youth to the city affects negatively on the development of the agricultural cluster of the republic’s economy, especially those in need of young specialists of different profiles. The negative impact on the socio-economic development of the region can have a permanent decline in the number of rural youth, which will subsequently lead to a reduction in the number of rural population

The main problems of building the system of statistical indicators in the field of cryonics

Cryonics as rather inconsistent, but constantly developing sphere of activity of modern society cannot be adequately estimated by means of separate private indicators or even their enlarged groups. This requires the development of a system of indicators that includes not only the traditional parameters of material and technical base and human capacity, but also the scale, intensity, results and consequences of cryonic activities. The key problems of the system of indicators of critical activity statistics, its features and possible approaches to its construction have been considered in the article

Dissipative soliton resonance in a full polarization-maintaining fiber ring laser at different values of dispersion

We investigated the dissipative solitons resonance in an ytterbium-doped fiber ring laser in which all the elements are polarization maintaining (PM). A semiconductor saturable absorber mirror was used as a mode-locker. The cavity included a normal dispersion single-mode fiber (SMF) and an anomalous dispersion photonic crystal fiber. The change of the length of the PM SMF allows the variation of the net-normal dispersion of the cavity in the range from 0.022 ps2 to 0.262 ps2. As the absolute value of the net-normal dispersion increases from 0.022 ps2 to 0.21 ps2, a square-shaped single pulse transformed to a single right-angle trapezoid-shaped pulse, and, at the dispersion of 0.262 ps2, to multiple right-angle trapezoid-shaped pulses, per round-trip

Stimulated Raman Scattering for All Optical Switches

We theoretically and experimentally investigate an all optical switch based on stimulated Raman scattering in optical fibers. The experimental setup consists of a Raman circuit of two stages connected in series through a bandpass filter. In the first stage, we have a saturated amplifier, in this stage the pump pulses are saturated when pump and signal are launched to the input or the pump pulses remain without saturation when pump only is launched at the input. The second stage works as the Raman amplifier; for this stage amplification is directly dependent on the pump power entering from the first stage. For the case when pump pulse only is launched at the input pass to the second stage without saturation and amplifies the signal entering in the second stage, very intense signal pulses appear at the output of this stage. For the case when both pump and signal pulses are launched to the input, the pump pulse is saturated in the first stage and the filter rejected the amplified signal, so that only low power pump enters the second stage and consequently no signal pulses appear at the output. We show that the contrast can be improved when using fibers with normal and anomalous dispersion connected in series in the first stage. The best contrast (the ratio of energies) obtained was 15 dB at 6 W pump peak power