The paper considers the application of various human-to-system interaction modeling methods used for ergonomics assessment. The existing human-to-system interaction (activity) modeling objectives and methods have been categorized. A simple case study demonstrates the capabilities and limitations of the structural activity modeling methods such as the generalized structural methods, the hierarchical and table-based problem solution methods, etc. It is shown that the structural functional analysis method is very promising for ergonomic assessment. It is shown that a less formal approach enables more creativity; however, in this case the results are more dependent on the expert’s qualification and experience in ergonomics and subject matter.

Assessment of safe NPP component operation is a highly important problem today. A NPP steam generator is safety-critical equipment. The paper studies and analyzes data for the header to steam generator pipe welding assembly failures at a NPP with VVER type reactors.

The paper considers a user-friendly contactless interface for managing 3D virtual objects. The interface recognizes voice commands and the user hand postures. The proposed solutions are based on the Microsoft Kinect device and modern multicore graphics processors supporting of parallel CUDA architecture.

The research objective is the design and implementation of a digital library for the AIP&CS Dept. The research domain and the similar systems have been analyzed; the user interface and the IT system have been developed. MS Visual Studio 2015 and C #, ASP.NET MVC Framework and the Entity Framework have been used as development tools.

The effects of some natural and artificial factors on the thermal interaction between a pipeline and permafrost soil has been studied. A mathematical model describing the soil temperature profile, thawed soil subsidence and pipeline elevation has been proposed. A temperature profile of the soil around the pipeline has been determined through solving the heat conductivity equation. The analysis accounts for the thermal interaction between the pipeline and permafrost soil; soil surface heat exchange; and porous moisture phase transformation heat exchange. For displacement and stress-strain analysis a pipeline has been represented as an elastic endless beam exposed to complex loads. The thermal and mechanical pipeline to soil interaction analysis accuracy has been estimated as the surrounding soil temperature field, the thaw halo border, and the pipeline stress-strain state is determined. The error is estimated by analyzing the data obtained analytically and through experiments. The obtained accuracy is sufficient to apply the proposed model for long-term stress-strain state analysis of a pipeline in permafrost. The model can identify vulnerable permafrost pipeline sections, and forecast the scope of work for each pipeline segment.

The paper considers the collector conductivity in the pore volume of oil bearing rock. The mathematical model for this category of phenomena is the Cauchy problem as applied to the Smoluchowski evolution equation. The paper covers a novel phenomenon: the transformation of the conservation ratio into the dissipation ratio derived from the Smoluchowski equation solutions. The dissipation of an average length graph represents a set of connected pores with a positive probability in a system of connected line segments those lengths match the system size that ensures a macroscopic connectivity. The latter is important for modeling the transfer process in porous media under various physical effects leading to pore coalescence.

Under the magnetic hydrodynamics model (MHD) a new category of exact solutions corresponding to a layered viscous magnetic fluid flow in an orthogonal magnetic field in an endless cylinder has been developed. A theorem stating that a solution of the MHD system of equation can be reduced to solving the heat conductivity equation for the fluid velocity and magnetic fluid strength vector components has been proved. The changes in the flow geometry caused by the rotation of the cylinder’s circumferential surface and by the magnetic field effects have been studied. The results are of interest for studying the incompressible fluid dynamics control.

The interpretation of two-mode horizontal well hydrodynamic survey (Russel) results have been considered. A mathematical model for the results interpretation and a case study with an error assessments are presented. A new equation for the horizontal well skin factor is proposed.

The possibility of Bazen rocks wettability changes as a result of using high pressure air injection method is considered based on a brief literature review. Summary of residual water saturation in Bazen rocks is presented, as well as the results of experimental investigation of temperature effect on wettability. The carbonates become more water-wet with temperature increase while the experimental results for terrigenous formations are quite ambiguous. A thorough investigation of the problem for Bazen suit under high pressure air injection thermobaric conditions is proposed to improve the reliability of the reservoir modeling results.

It takes an innovative approach to improve oil recovery. One such approach is ASP. The research has determined the relation between the surface tension coefficient at the oil-ASP interface and the solution component concentration and temperature. The study of these relations has enabled to select the optimal ASP solution concentrations at the temperature close to the oil reservoir bottom temperature.

Modern science has approached the study of special 3rd kind systems (complexity) that lack statistical sample stability. The conventional physical and engineering concept of statics (the x ( t ) system state vector is stationary as dx₁/ dt = 0) and kinematics (when the velocity is above zero, x₂ = dx₁/ dt ≠ 0, x_i ≠ const, or the acceleration x₃ = dx₂/ dt ≠ 0) for complex, homeostatic systems (complexity as defined by I. R. Prigogine and M. Gell-Mann) become completely different. For the fixed homeostasis in live systems or the meteorological conditions (climate) we introduce the new concepts of quasiattractors, uncertainties of the 1st and 2nd kind, and a special complexity kinematics definition as a movement (variation) of the quasiattractor parameters in a m-dimensional phase state space.

At the present stage of power industry development there is a need to improve nuclear power unit safety, reliability, and efficiency. To solve these problems, the mathematical and statistical reliability theory has been under development for the last couple of decades. The mathematical models representing the system behavior vs. time are being created. The reliability indicators are assessed with the information available through special tests or obtained in actual operation. The most objective information to determine the component reliability is the performance data since they reflect the actual unit operation, the factors it is affected to, and other features. The paper considers various statistical data obtained in service, their features, and modeling approaches. As an example, a complete, left-truncated and right-censored data modeling method is used because it is quite common in real life. A number of likelihood functions for the exponential, gamma, and Weilbull distribution are presented. A case study is included. The max likehood method is applied to evaluate the exponential distribution law parameters for a test sample that contains complete, left-truncated and right-censored data. The changes in the exponential distribution law parameter and its accuracy vs. the share of truncated/censored data have been studied.

The problem and its possible solution are presented. Without the loss of generality the paper uses a quaternary number system with the set of digits Z(4)={0,1,2,3}.

The fundamental live system behavior patterns are considered in terms of classical Clausius and Boltzmann thermodynamics, and I. R. Prigogine non-equilibrium system thermodynamics. The new theory of chaos-self-organization shows that the laws of thermodynamics are inapplicable to live homeostatic systems at their level of organization (i.e., the system level), although they are perfectly applicable at the molecular level. The Glensdorff-Prigogine theorem stating the minimum entropy increase P = dE/dt in the area (vicinity) where entropy E has a maximum (at the equilibrium points) is inapplicable to homeostatic (live) systems.

The paper considers the efficiency of water injection into a seamy heterogeneous oil saturated reservoir. The paper provides theoretical fundamentals for estimating the injection efficiency, and a case study. Therefore, oilfield design analysis can be verified through logged data analysis. The analysis results are also applicable to identifying mobile oil supplies within an oil saturated reservoir.