For a long time in software engineering, there is a problem of a rather significant percentage of software project failures. One of the most frequent causes of such failures is non-optimal allocation of human resources, that is, the allocation of developers to tasks in accordance with their skills and the specifics of the task. Software development requires continuous improvement of skills and the degree of mastery of one skill can positively influence others associated with it. Due to the considerable number of skills there is a need in the expert system that allows you to track the changing skills and implement a near-optimal allocation of human resources. The impossibility of unambiguous evaluation of skills and partial overlapping with each other lead us to the fuzzy sets theory for processing of information about employees, rather than applying classical set theory or probability theory. At the end of the article, the most significant skills of IT specialists are presented.

Keywords: expert systems, software development, project management, human resources allocation, fuzzy sets, uncertainty, probability theory, software developer skills

The influence of mechanical activation conditions on the the sintering temperature, grain size and microstructure of PZT-19 ceramics was established. It was found that the mechanical activation method allows to increase the uniformity of ceramics grains.

Keywords: ferroelectrics, particle size distribution, green building, mechanical activation, PZT

Solved calculation of equilibrium distribution of Ge and the density of elastic energy in semiconductor film SiGe/Si. Built the 3D model of flat film with pyramid islands and dislocations. Calculation of elastic deformation is made using the finite element method. In this model takes into account the uneven distribution of Si and Ge due to threading dislocations, misfit stress and dislocation loops. The results showed that in the two-part elastic layer SiGe provision balance dislocation is located in the depth of the inconsistencies of the film and not on the boundary of film-substrate. This conclusion applies to the penetrating dislocation, while changing the orientation of dislocation much changes box elastic stresses and distribution component of Si and Ge in the film. The results of the calculation model of the sample, including prismatic dislocation loop, shown a significant impact on the value of the elastic energy of the film. While accounting for the effects of non-uniform distribution of SiGe alloy component does not result in a significant change in the magnitude of elastic energy model and critical values of height. According to calculations, taking into account the heterogeneity of the distribution component of the alloy transition to the formation of Epitaxial islets on the film surface occurs at lower values of their critical size, especially when small concentrations of Ge in the alloy. The results of calculation of the elastic energy of the film received at work, can be applied to calculate the conditions of occurrence of defects in nanometer dimension on the original flat free surface of semiconductor films.

Keywords: germanium, thin film, heteroepitaxy, SiGe, misfit dislocations, threading dislocation, elastic energy density, dislocation loop

The article briefly describes the technical solution for the use of specialized fiber-optic cable embedded in ground wire (OPGW) on the sections of electric Railways AC. The technical solution is to combine in a single conductor functions return conductor and fiber optic communication lines. Are given the relevance of such decisions and some peculiarities of its implementation. The main part of the article examines to the selection options return conductor with combined functions. The article describes the theoretical dependencies for the combined selection of the conductor based on the thermal resistance criterion. As one of the main passport parameters of the OPGW cables is the section of the metal component, the percentage of their content and the variation percentages are used in calculations to determine the electrical resistance of the cable and the magnitude of the permissible current. This approach allows to determine the parameters of the cable based on the criterion of reliability and allows to obtain the cable composition for a subsequent order from the manufacturer. The algorithm of selection combined return conductor that contains two stages: pre-selection based on the reference data, the choice of the real parameters from the manufacturer.

Keywords: OPGW, reverse wire, combined reverse wire, electrothermal degradation, fiber-optic transmission lines railway transport, traction network, the choice of combined shield wire

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