6 forecasting production performance

This article considers the application of econometric calculations by the method of statistical dependence equations to analyze the relationships between various factors and the performance indicator. It is noted that the use of econometric calculations should be based on knowledge and understanding of the essence of economic processes and phenomena, the specifics of economic interrelations and the laws of their development. The study presents the methodology by using statistical dependence equations and calculating the factor stability coefficients based on the actual development indicators of the livestock sector in the Akmola region over several years.peer-reviewe

Stages of steady diffusion growth of a gas bubble in strongly supersaturated gas-liquid solution

Gas bubble growth as a result of diffusion flux of dissolved gas molecules from the surrounding supersaturated solution to the bubble surface is studied. The condition of the flux steadiness is revealed. A limitation from below on the bubble radius is considered. Its fulfillment guarantees the smallness of fluctuation influence on bubble growth and irreversibility of this process. Under the conditions of steadiness of diffusion flux three stages of bubble growth are marked out. With account for Laplace forces in the bubble intervals of bubble size change and time intervals of these stages are found. The trend of the third stage towards the self-similar regime of the bubble growth, when Laplace forces in the bubble are completely neglected, is described analytically.Comment: 22 page

Underbarrier nucleation kinetics in a metastable quantum liquid near the spinodal

We develop a theory in order to describe the effect of relaxation in a condensed medium upon the quantum decay of a metastable liquid near the spinodal at low temperatures. We find that both the regime and the rate of quantum nucleation strongly depend on the relaxation time and its temperature behavior. The quantum nucleation rate slows down with the decrease of the relaxation time. We also discuss the low temperature experiments on cavitation in normal $^3$He and superfluid $^4$He at negative pressures. It is the sharp distinctions in the high frequency sound mode and in the temperature behavior of the relaxation time that make the quantum cavitation kinetics in $^3$He and $^4$He completely different in kind.Comment: 10 pages, 2 figure

Prediction of the release process of the nitrogen-extinguishant binary mixture considering surface tension

© 2020 Springer-Verlag. The final publication is available at Springer via https://doi.org/10.1007/s10973-020-10040-2.Nitrogen used for pressurization in the extinguisher can be partially dissolved in the fire extinguishing agent. Consequently, the evolution of the dissolved nitrogen has a significant effect on the release behavior of the fire extinguishing agent in a rapid process. In this article, a new model was developed to predict the critical pressure of the nitrogen evolution and the release process of the fire extinguishing agent was described in detail. According to the Peng-Robinson (PR) equation of state and van der Waals mixing rule, the effect of the dissolved nitrogen on the surface tension of the fire extinguishant was analyzed by considering surface phase and fugacity coefficient. A method to calculate the surface tension of the liquid agent dissolved with nitrogen was proposed. The results showed that the proposed model can determine the accurate critical pressure of the evolution of the dissolved nitrogen and further evaluated whether nitrogen escapes. At different initial filling pressure, in addition, the release process of the nitrogen-extinguishant such as CF3I, FC218 (C3F8), HFC125 (C2HF5), and Halon1301 (CF3Br) was well predicted by the fluid release model when taking the surface tension and adiabatic index of the mixture into account. Compared with the previously obtained experimental data, the predictions obtained indicated that the present model can adequately describe the liquid and the gas mixture release stage in the release process of the nitrogen-extinguishant.Peer reviewe

СЕРВЕР ПРОБЛЕМНО-НЕЗАВИСИМОЙ КОМПОНЕНТЫ СИСТЕМЫ УПРАВЛЕНИЯ ДОКУМЕНТАМИ

Domain independent server for document management system is detailed. Server plays a role of basic software which allows to extend functionality of the system. Main objective of suggested server is processing requests from representation layer. Server’s architecture and functionality are also reviewed.Рассматривается задача разработки сервера проблемно-независимой компоненты (СПНК) системы управления документами, который выступает в роли базового программного обеспечения (ПО) и позволяет наращивать функциональность системы. Основное назначение СПНК - обработка запросов от уровня представления. В работе описываются устройство, принцип работы и функциональные возможности СПНК. Выделяются основные компоненты СПНК, рассматривается протокол взаимодействия между ПО конечного пользователя и СПНК, описывается формат передаваемых сообщений

Labour Migration and Remittances: Strategy for Survival or Development?

The article is devoted to an actual problem of labor migration, the study of remittances and their role in the lives of migrant households. Remittances are used in migrant households in Central Asia primarily for the purchase of consumer goods. Since labor migration flows in the region tend to increase, and the volume of remittances increase, it becomes much more urgent to use the remittances not only for consumption, but also for development. To develop the programs on the use of remittances for the development of outcomes in the countries and for the achievement there is a need to study the problem comprehensively: the volumes and methods of transfers, their role in migrant households and national economies. Keywords: Labour migration, Migrant remittances, Central Asia, Kazakhstan JEL Classifications: F22, J61

Momentum and buoyancy transfer in atmospheric turbulent boundary layer over wavy water surface - Part 2 : Wind-wave spectra

Peer reviewe

Sub-micron sized saccharide fibres via electrospinning

In this work, the production of continuous submicron diameter saccharide fibres is shown to be possible using the electrospinning process. The mechanism for the formation of electrospun polymer fibres is usually attributed to the physical entanglement of long molecular chains. The ability to electrospin continuous fibre from a low molecular weight saccharides was an unexpected phenomenon. The formation of sub-micron diameter “sugar syrup” fibres was observed in situ using high speed video. The trajectory of the electrospun saccharide fibre was observed to follow that typical of electrospun polymers. Based on initial food grade glucose syrup tests, various solutions based on combinations of syrup components, i.e. mono-, di- and tri-saccharides, were investigated to map out materials and electrospinning conditions that would lead to the formation of fibre. This work demonstrated that sucrose exhibits the highest propensity for fibre formation during electrospinning amongst the various types of saccharide solutions studied. The possibility of electrospinning low molecular weight saccharides into sub-micron fibres has implications for the electrospinability of supramolecular polymers and other biomaterial