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

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

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

Production of fine-ground NK-alumina 11 and NK-alumina 14 for low-cement refractory castables

This article characterizes fine-ground NK-Alumina 11 and NK-Alumina 14 developed in PKF "NK" for low-cement refractory castables. The quality indicators of the developed aluminas are not inferior to international analog

DEVELOPMENT OF A PROTECTIVE COATING AGAINST CAVITATION AND ELECTRIC CORROSION EXPOSURE USING POWDER PAINT WITH ADDED CNT

Cavitation and electric corrosion exposure is poorly studied. Planed to study impact the cavitation and electric corrosion exposure on titanium alloy that coated powder paint with added carbon nanotubes

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

Digital receivers for low-frequency radio telescopes UTR-2, URAN, GURT

This paper describes digital radio astronomical receivers used for decameter and meter wavelength observations. This paper describes digital radio astronomical receivers used for decameter and meter wavelength observations. Since 1998, digital receivers performing on-the-fly dynamic spectrum calculations or waveform data recording without data loss have been used at the UTR-2 radio telescope, the URAN VLBI system, and the GURT new generation radio telescope. Here we detail these receivers developed for operation in the strong interference environment that prevails in the decameter wavelength range. Data collected with these receivers allowed us to discover numerous radio astronomical objects and phenomena at low frequencies, a summary of which is also presented.Comment: 24 pages, 15 figure

СИСТЕМАТИЗАЦИЯ И ДИФФЕРЕНЦИАЦИЯ ГОСПИТАЛЬНЫХ ИНФЕКЦИЙ ПО ЭПИДЕМИОЛОГИЧЕСКИМ И КЛИНИЧЕСКИМ ПРИЗНАКАМ

In the review the analysis of data on hospital infections which can be used at the organization of their prophylaxis in the hospitals. Systematization and differentiation of hospital infections depending on the reasons and conditions of occurrence, mechanisms of development, clinical and epidemiological signs has great value. It will assist specialists in planning and carrying out of the measures directed on improvement of quality of treatment of patients and increase of epidemiological safety of the hospital environment.В обзоре представлен анализ сведений о госпитальных инфекциях, которые могут быть использованы при организации их профилактики в лечебно-профилактических учреждениях. Большое значение имеет систематизация и дифференциация госпитальных инфекций в зависимости от причин и условий возникновения, механизмов распространения, клинических и эпидемиологических проявлений. Это окажет помощь специалистам в планировании и проведении мероприятий, направленных на улучшение качества лечения пациентов и повышение эпидемиологической безопасности госпитальной среды