The structure of synthesized ferroelectric samples of PbSc0.5Ta0.5O3 after mechanoactivation were studied by means of X-ray absorption spectroscopy(XANES), X-ray diffraction (XRD) and scanning electron microscopy (SEM). Based on the combination of effective experimental methods and computer modeling of theoretical X-ray absorption spectra near the L3 - edge of tantalum and lead was studied character of structural distortions for investigated samples after mechanoactivation.

Keywords: Ferroelectrics materials, mechanoactivation, XANES, defects

In the article, the use of digital processing to improve the quality of data obtained using the sensor network field strength measurements EFM550 production company "Vaisala" working with the hardware-software complex in the centre of geophysical monitoring of the situation over the southern region of the Russian Federation fgbu "high-mountain geophysical Institute". Explores the possibility of using Kalman filtering to Refine the data instrument measurements of the electric field of the atmosphere. A comparative analysis of the obtained stroke data of the electric field before and after filtering.

Keywords: the electric field of the atmosphere, measuring the strength of the electric field of the atmosphere, digital filtering, Kalman filtering, mathematical processing of measurement data

Physical education at the present stage of world development of society takes the form of a social phenomenon, is to strengthen the role of sport in the lives of everyone. Variety of sports meets a wide range of specially adapted facilities. The problem of technical modernization, stadium reconstruction and development as a multi-functional sports facilities (IVS). Profitability maintained and advanced facilities can be improved by putting into practice the principles of design of architectural form and structural theoretical model of the spatial organization of the IVS.

Keywords: reconstruction of the stadium, technical modernization, multi-purpose sports facility, the principles of formation of architectural, structural theoretical model

The paper considers the method of experimental evaluation of the signal / noise ratio in relation to space communication systems. The basis of the high-precision evaluation method laid experimental signal / noise ratio is implemented by measuring the average number of the envelope of the additive mixture signal emissions and narrowband normal random process.

Keywords: Space communication system, command-and-measurement system, signal / noise ratio, the number of emissions, the envelope of the additive mixture, rms noise level restrictions, the sub-carrier frequency

The method of in situ experimental studies on the landslide slopes and road designs on them using vibro-measuring complex

Keywords: The landslide slope, experiment, microseismic vibrations, monitoring of dynamic deformation, vibrometry, model

The work carried out to optimize the design and manufacturing process of the main working element of the horizontal mixer - paddle shaft. Achieved reduction in metal consumption and labor input shaft, improved mechanical properties of the elements of his installation. This allowed for the production of products of the required quality at substantially lower cost of production process.

Keywords: roller blade, horizontal mixer, optimization, design, process, material procurement, machining, reduction of production costs

The process of profiling tubes with rollers was considered. The method of solving the problem was considered. The stress-strain state of the metal in this process was determined, the equations of relative deformations was given, the shear strain intensity in cylindrical coordinates are given for the case of a plane homogeneous deformed state. The stress state index was defined

Keywords: Pipe profiling, deformation, stress, flat pattern, mathematical model, stress concentration, stress-strained state, stress state index

In this paper, main technical characteristics, a technical structure and a structural arrangement of the hydraulic loading station are presented. Presented control system’s structure makes it possible to solve the reproduction problem for axial, shearing forces and moments with the required accuracy using preset speeds.

Keywords: hydraulic system, load control system, pressure regulator.

Article contains the control system of distance learning with use of educational resources where the purpose of management set upgrading of tutoring by means of modification of content and the interface of an educational resource, for increase in number of the fissile users is described. Authors offered the motivation mechanism of users to sessions continuation of tutoring by means of behavioural interactive notices on the basis of data from a condition assessment subsystem of the trainee. Effectiveness of the offered mechanism is proved by urgent statistical data.

Keywords: Educational resources, mobile applications developing resources, the active user, interactive notification messages, management system educational process, the user interface, content, the mechanism of motivation of users.

The article proposes a new formulation of the knapsack problem, and also considers the mathematical model used to solve the problem of choosing the optimal strategy for information protection of distributed systems. The essence of the new task is expressed in the use of a set of goals when completing a knapsack.

Keywords: Information security, information protection, distributed system, combinatorial problem, mathematical modeling, knapsack problem, equivalence, model of threats.

An inportant and challenging task for a market analyst is to predict a value or a direction of a certain indicator based on the behaviour of a given financial instrument. In this paper we use random forest algorithms to predict a value and a direction of an implied volatility of RTS index options. We collect and prepare the historical data with an algorithm which takes into account both the actual trades history and the ordlog. We then examine and use the effect of volatility clustering which can be observed on such options. Finally, we construct some simple option trading strategies based on the predictions we made and measure their performance on a subset of our historical data. The results obtained shows that such approach can of use as one of the mechanisms for making decisions in practical trading, and needs further research.

Keywords: option, trading strategies, random forest, RTS index, spot market

In the article managed photon pairs generation methods in lightguides with actively formed dispersion for producing a single-photon light state are discussed. Generation principle is based on of spontaneous parametric scattering or spontaneous fourwave mixing. To get the factored state, i.e. spectral and spatial correlations between daughter photons are eliminated, the usage of photonic crystal fiber, that allow to form complex frequency dispersion profiles by changing the fiber structure, is analyzed.

Keywords: photonic-crystal fiber, quantum communications, femtosecond laser, actively formed dispersion, photon pairs, single-photon states

In the article discusses the features of work air handling unit (AHU) based on spray chamber (SC), developed the design of the test bench and presents the results of the tests SC, identify ways to improve them, particularly in the lower part of the workspace was placed plane-parallel packing. It was established experimentally that the efficiency of processes of heat and moisture transfer increased by an average of 6 - 10%.

Keywords: air handling unit, spray chamber , heat and mass transfer, efficiency

Study of stress-strain state of the construction using the Finite Difference Method. Obtained the matrix of coefficients of resolving equations. To assess the convergence of the calculation results were compared with the known numerical solutions.

Keywords: the Finite Difference Method, diagrams of moments, Fixed Offshore Platforms, linear displacement, deflection, thin plates

Modern sources based on the usage of spontaneous four-wave mixing in photonic-crystal fibers generate photon pairs in wide wavelength range. Microstructured fibers allow actively managing frequency dispersion profile. In the design of different types of photonic-crystal fibers is necessary to research the influence of microstructure on fibers properties. Nowadays one of the most perspective solutions is numerical and program modeling. Paper presents modeling of photonic-crystal fiber structures to find optimal parameters of the nonlinear medium.

Keywords: photonic-crystal fiber, modeling, photon pairs, single-photon states, spontaneous four-wave mixing