Data on granulometric composition of calcium phosphate obtained by dispersion method

The kinetics of calcium phosphate crystallization from model solutions of saliva and liquid phase of dental plaque has been studied by the dispersion method. It was found that the composition of the saliva model system is favorable for the growth of larger crystals. The size of the particles in crystallization varies nonlinearly. As supersaturation grows, the amount of formed particles increases, however, the average rate of crystallite growth decreases

The efficiency of the russian economy and multidimensional modeling

© Medwell Journals, 2016.The study presents the methods and results of a multidimensional assessment of the efficiency of the Russian economy which is based on the interrelationship between the crucial socio-demographic, market and financial-investment proportions of the economy. The researcher construes the efficiency of a macroeconomic system as a state of being close to the "ideal" functioning of the macro-system, attaining strategic objectives and long-run development priorities for the innovative modernization and social capital of the economy, the availability of efficient mechanisms for competition, sustained minimization of corruption and formation of efficient market establishments. The results obtained enabled the researcher to come up with a set of activities aimed at bringing the level of socio-economic efficiency of the Russian economy in line with that of the developed countries of the world

First-order spatial coherence of excitons in planar nanostructures: a k-filtering effect

We propose and analyze a k-filtering effect which gives rise to the drastic difference between the actual spatial coherence length of quasi-two-dimensional (quasi-2D) excitons or microcavity (MC) polaritons in planar nanostructures and that inferred from far-field optical measurements. The effect originates from the conservation of in-plane wavevector k in the optical decay of the particles in outgoing bulk photons. The k-filtering effect explains the large coherence lengths recently observed for indirect excitons in coupled quantum wells (QWs), but is less pronounced for MC polaritons at low temperatures, T<10K

Phytosanitary features of pea morphotypes under the conditions of the Tyumen region

The selection material and finished varieties of peas for sowing different morphotypes of the grain direction were assessed for the formation of a phytosanitary state and productivity, and the effectiveness of protection methods. During the growing season, leaf and stem diseases were observed with varying degrees of development and timing of manifestation (p. Ascochyta, p. Uromyces, p. Erysiphe communis G) with development depending on the year and genus of the pathogen from 0.2-40%. The development of the river. Ascochyta - 10-20%, r. Erysiphe - 11-49%, p. Uromyces - 0.2-20%. Some resistance was determined in 22% of varieties p. Erysiphe communis G., 11% p. Ascochyta and 14% p. Uromyces. The yield for the period of study of pea varieties of the sowing grain direction varied from 3.2 to 4.6 t/ha, stable yields in the morphogroup chameleon with an increase of 0.64 t/ha or 17% to the standard. Protection of peas requires mandatory pre-sowing treatment with a chemical disinfectant, a biological preparation with the inclusion of an agrochemical in the mixture, which contributes to the development of the root system, activation of growth vigor, and a 70-90% reduction in pathogenic fungi on seeds and roots. Fungicidal protection in the budding phase - the formation of beans contributed to the preservation of the crop by 0.3-0.4 t/ha

ПРОПУСКНАЯ СПОСОБНОСТЬ ОПТИЧЕСКОГО ВОЛОКНА КВАНТОВОЙ СИСТЕМЫ СВЯЗИ

A mathematical model of communications channel that transfers data by means of separate photons having different polarization has been developed. The expression for calculating of optic fiber throughput has been obtained that takes into account probabilities of depolarization and absorption of radiation photon. As a result of implemented simulation it has been found that data throughput depends on the length of optic fiber. It has been established that photon absorption as compared with its depolarization contributes greatly to the size of optic fiber throughput.Построена математическая модель канала связи, в котором данные передаются с помощью отдельных фотонов с различной поляризацией, и получено выражение для расчета пропускной способности оптического волокна, учитывающее вероятности деполяризации и поглощения излучения. По результатам выполненного моделирования получены зависимости пропускной способности оптического волокна от его длины. Установлено, что поглощение фотона, по сравнению с его деполяризацией, оказывает наибольшее влияние на пропускную способность оптического волокна

ПРОПУСКНАЯ СПОСОБНОСТЬ КВАНТОВОЙ ОПТИЧЕСКОЙ СИСТЕМЫ СВЯЗИ

Impact of registered optical radiation intensity, overvoltage, dimensions of photosensitive surface, structure of p-n junction and avalanche photodetectors dead time operating in the photon counting mode on quantum optical system capacity has been carried out in this investigation. As a result, the quantum optical system maximum capacity of 81 kbit/s has been obtained.Выполнено исследование влияния интенсивности регистрируемого оптического излучения, величины перенапряжения, размеров фоточувствительной поверхности, структуры p-n-перехода и мертвого времени лавинных фотоприемников, работающих в режиме счета фотонов, на пропускную способность квантовой оптической системы связи. Получена максимальная пропускная способность квантовой оптической системы связи – 81 кбит/с