An optimized medium for clonal micropropagation of grapevine

Research Not

INTEGRATION PROCESSES AND THEIR EFFECT ON IMMIGRATION POLICY

The article deals with theoretical aspects of correlation between integration and immigration processes. After the research of current theoretical background related to the international economic integration the authors believe that the so-called triad «integration processes - waves of innovation - migration processes» should be examined individually. That is to say, the dynamics of an inheriting wave of innovation is consistent with the mobility of correlation between scarcity and redundancy of labour supply. This implies expediency of the regulatory action on these processes, including the implementation of the selective immigration policy and reasonable emigration policy, which may be either confirmed or rejected in an econometric framework, making it possible to trace the correlation of the immigration processes and performance of GDP in individual countries, members of integration associations

INTEGRATION PROCESSES AND THEIR EFFECT ON IMMIGRATION POLICY

The article deals with theoretical aspects of correlation between integration and immigration processes. After the research of current theoretical background related to the international economic integration the authors believe that the so-called triad «integration processes - waves of innovation - migration processes» should be examined individually. That is to say, the dynamics of an inheriting wave of innovation is consistent with the mobility of correlation between scarcity and redundancy of labour supply. This implies expediency of the regulatory action on these processes, including the implementation of the selective immigration policy and reasonable emigration policy, which may be either confirmed or rejected in an econometric framework, making it possible to trace the correlation of the immigration processes and performance of GDP in individual countries, members of integration associations

Spectroscopic investigations of dispersion-shifted fiber with thin active Bi-doped ring and high nonlinear refractive index

A germanium-doped silica-core fiber with an active region in the form of a thin ring of silica doped with bismuth ions was fabricated. Bismuth doping in the ring surrounding the core allows to stabilize bismuth in silica glass, and it does not impose any restrictions on the composition of the core. The bismuth concentration in the ring is less than 0.2 wt.%. The GeO2 concentration in the core is more than 15 mol.%. A high germanium concentration in the core allows to shift the zero dispersion wavelength to 1860 nm and to obtain a high nonlinear refractive index (n2 more than 3,2*10-20 m2/W). Spectroscopic investigations were carried out in the visible and near infrared (800-1700 nm) spectral range. Despite the small concentration of bismuth, we observed the absorption and luminescence characteristic bands, confirming the presence of bismuth active centers in silica glass. Upon pumping at 1350 nm the on/off gain spectrum was measured on a 20-m fiber. The gain was observed throughout investigated range of 1430-1530 nm. The maximal gain of ~9.5 dB was obtained near 1430 nm. The results of the spectroscopic investigations of the fiber with a thin active Bi-doped ring showed prospects of the creation and application of such fiber type for laser and nonlinear optics

Breeding for Ukrainian table grape varieties

Research Not

Reduction of Nitrogen Oxides Emissions from a Coal-Fired Boiler Unit

Текст статьи не публикуется в открытом доступе в соответствии с политикой журнала.During combustion of fossil fuels a large amount of harmful substances are discharged into the atmospheres of cities by industrial heating boiler houses. The most harmful substances among them are nitrogen oxides. The paper presents one of the most effective technological solutions for suppressing nitrogen oxides; it is arrangement of circulation process with additional mounting of the nozzle directed into the bottom of the ash hopper. When brown high-moisture coals are burnt in the medium power boilers, generally fuel nitrogen oxides are produced. It is possible to reduce their production by two ways: lowering the temperature in the core of the torch or decreasing the excess-air factor in the boiler furnace. Proposed solution includes the arrangement of burning process with additional nozzle installed in the lower part of the ash hopper. Air supply from these nozzles creates vortex involving large unburned fuel particles in multiple circulations. Thereby time of their staying in the combustion zone is prolonging. The findings describe the results of the proposed solution; and recommendations for the use of this technological method are given for other boilers