bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research of oil-based drilling fluids to improve the quality of wells completion
Authors: Nutskova M.V. , Kupavykh K.S. , Sidorov D.A. , Lundaev V.A. 
Published: December 2019

Abstract
The aim of the work is to increase the well completion efficiency when using oil-based drilling fluids. In this study, the effect of the aqueous phase content on the change in the rheological parameters of the solutions and the effect of the type of asphalt on the structural-rheological and filtration parameters of the oil-based solution was conducted. Studies have shown the effectiveness of various types of asphalt in OBM systems, the obtained dependencies on the effect of the Oil-water ratio can be used in production to select the optimal ratio for the selection of specific properties of solutions.
Research of technological properties of cement slurries based on cements with expanding additives, portland and magnesia cement
Authors: Zimina D.A. , Nutskova M.V. 
Published: December 2019

AbstractThe boring log in the Eastern Siberia regions is characterized by the presence of frozen rocks, which causes a number of specific drilling problems. In such conditions, magnesia materials characterized by high expanding capacity are widely used for cementing wells. These materials improve well cementing quality by increasing the areas of complete contact at the rock-cement and cement-casing boundaries. For their effective use, it is important to evaluate the cementing parameters in comparison with the traditionally used Portland cement-based plugging materials. The high quality of the magnesia cement compositions in comparison with Portland cement was justified based on the data obtained from laboratory analysis.
Fuzzy modelling for tasks of management of the agricultural-industrial complex
Authors: Parfenova V.E. , Bulgakova G.G. , Amagaeva Yu.V. , Evdokimov K.V. 
Published: December 2019

Abstract
The problem of modeling and accounting for uncertainty in modern tasks of management is relevant. The effectiveness of the decisions depends significantly on the methods for describing the uncertainty in the problem. The greatest development in agrarian science received optimization and econometric models. How-ever, these models are based on quantitative determined initial information and accounting for uncertainty as randomness, which is described by probabilistic and statistical methods. Meanwhile, many modern decision-making tasks in planning and managing agricultural production are characterized by the presence of uncertain factors, as well as the availability of high-quality, inaccurate or in-complete information. To account and describe such uncertainty, an alternative approach to the probabilistic approach is needed. Fuzzy set theory is one of the most effective mathematical tools aimed at formalizing and processing uncertain information. The econometrics section related to using fuzzy set theory in regression analysis is developing methods of fuzzy regression modeling. The possibilities of using fuzzy regression modeling tools for analyzing management processes of agricultural production are discussed in this article.
Enhancing of Operational Reliability of Catenary and Electric Rolling Stock Wire Connections
Authors: Samokhvalov V N , Samokhvalova Zh V 
Published: December 2019

Abstract
The article deals with technological possibilities of operation reliability enhancement of high-current electrical connections while assembling unattended assembly joints under the pressure of pulsed magnetic field. The results of numerical modeling and experimental research of the catenary assembly process for the monometallic, bimetallic and composite multistranded wires between themselves and between them and terminals including those resulting vias made of aluminum and copper. The results of heat and electric tests of resulted connections are presented. It is ascertained that mechanical breaking strength of connections obtained under the pressure of pulsed magnetic field reaches 98…100% of intact wire strength. The factors of electrical contact defectiveness per resistance and per overtemp with rated current while making magnetic-impulse assembly of a wire and a coupling are lower than limit values, which are established for connections of feed wires, connectors and connecting clamps, which are obtained by pressing.
Development of uncertainty estimation procedure for measurement of nonlinear distortions
Authors: Belaya M , Kravtsova S 
Published: December 2019

Abstract
The article is devoted to the question of expediency of development of uncertainty estimation procedure for measurement of nonlinear distortions. The article deals with the sequence of uncertainty estimation in the measurement of nonlinear distortions. Using the reference calibration tool, the installation of the measuring sample K2C-57, calibration was carried out and the results of experimental studies were obtained, in assessing the uncertainty of measuring the harmonic distortion.
Development of the process map “research and development” for agricultural organizations
Authors: Aytasova A. , Selezneva Zh. , Belinskaia I. , Evdokimov K. 
Published: December 2019

Abstract
The quality management system is developing rapidly and dynamically in organizations of agriculture. The management of agricultural enterprises realizing the role of a leader in quality work is aimed at continuous improvement in all aspects of activity. The management of agricultural enterprises, realizing the role of a leader in quality work, is aimed at continuous improvement in all aspects of activity. The QMS in food production is implemented based on international standards such as ISO 22000, ISO 9001, where successive processes are described, which also include the principles of HACCP. This standard combines risk analysis and critical control points. Based on all these consistent measures, enterprises are striving to improve both the quality of the products and the work of the company as a whole. This is a necessary measure, it is obligatory in today’s time, because thanks to it, not only the product quality, but also the competitiveness of the production in the market increases. As a result, the enterprise opens an export opportunity. Without the introduction of a quality management system, the company cannot move on. This article discusses the QMS documentation, which allows controlling the processes and fruitfully developing the organizations of agriculture. Developing of the research engineering and development work process map for agricultural organizations. The input and output data of the process are determined, as well as the performance and risk indicators for the process. To improve the process management system, thresholds for process performance indicators are defined. The risks of the activities of the processes, to minimize the risks and prevent them in the future. The method of determining the effectiveness of the process is implemented. Indicators must be met in full size, without fail, of the number of non-compliances detected by the customer leads to a deterioration in the performance of the process by a percentage.
Research of stress and deformation of the foundation slab of the building taking into account anisotropic soil properties
Authors: Tumakov S.A. , G.N. Golub’ 
Published: December 2019

Abstract
A numerical study of the influence of the anisotropic properties of soils on the stress-strain state of the foundation slab of an apartment building is carried out in the paper. A transversely isotropic base with the assumption of obeying the laws of a continuous linearly deformable anisotropic medium is accepted as a model of a soil base. The analysis of deformations, stresses and the necessary reinforcement in the sections of the foundation slab is performed. It is concluded that it is necessary to take into account the anisotropic properties of soils when calculating the building-structure system.
The effect of structuring composite building materials
Authors: Gotovtsev V M , Ignat’yev A A 
Published: December 2019

Abstract
A mechanism for structuring the dispersion-filled composite materials by the example asphalt concrete is considered in this paper. The effect of an abrupt increase in the strength and water resistance of the material is conditioned the manifestation of intermolecular interaction forces, is shown, which occurs during the formation of binder films between dispersed aggregate particles with a thickness comparable to the radius of action of intermolecular attraction forces. It was established that the structuring of asphalt concrete is manifested when the thickness of the liquid interlayers between the particles of the mineral powder is about 10-7 m, which allows to attribute the effect to the category of nano effects. The technology of industrial production of structured material based on pelletizing is proposed. The test results of the new material are presented. The possibility of using the developed technology for the disposal of industrial waste is shown.
Thermal modification of high moisture round logs in the environment of saturated water vapor with simultaneous predrying
Authors: Shaikhutdinova A R , Safin R R , Mukhametzyanov S R 
Published: December 2019

AbstractThe review of researches in the field of heat treatment of wood in Russia and abroad is carried out. The energy saving technology of thermal modification of high moisture round logs in the environment of saturated water vapor with simultaneous predrying is developed. The description of design of installation for realization of the offered technology is presented. The tests for determination of physical and chemical changes in wood during thermal modification were run. The results of tests and the regime parameters of conducting the process of thermal modification in the environment of water vapor for the purpose of receiving wood with the improved final characteristics are presented.
Influence of development conditions on qualitative indicators of Fungus Chaga
Authors: Razumov E , Safin R , Mukhametzyanov S R , Hučko Boris , Martin Pavlik , Gomba Gordon Karikoga , Bazant Vaclav 
Published: December 2019

Abstract
The paper gives description of the growth conditions on the output of valuable components from the fungus chaga. The samples of chaga represent two different regions of Eurasia – Western Siberia and the Czech Republic. The results of the research proved that the yield of melanin in water extracts from the chaga grown in Western Siberia was 1.7% higher than that of the Czech analogue. Consequently, the authors concluded that the harsher conditions of growth, which cause a slow growth of the fungus, lead to a greater accumulation of useful substances.
Development of laboratory techniques for assessment of operating properties of intumescent fireproofing coatings
Authors: Virolainen I , Martynov A , Ustinov A , Andreev A 
Published: December 2019

Abstract
adhesion of a charred layer to the surface of constructions and materials is one of the main components of fire protective efficiency of intumescent charring compositions, especially for metal surfaces. The paper overviews literature sources concerning the investigation of adhesive-cohesive properties of charred layers. It is shown that there are no easily performable methods for assessment of these properties. The laboratory device based on the «back strike» method has been developed. Adhesive-cohesive properties of charred layers modified with carbon additives were assessed using «back strike» method and pushing method. It is shown that these methods provide equal results.
Development of led-curable intumescent polymer coatings for fire protection of building constructions
Authors: Tomakhova A , Zybina O , Suprun V , Babkin O 
Published: December 2019

Abstract
The influence of reactive monomer on the properties of fire-protective intumescent composition and the final UV-curable coating was investigated; it was established that compositions based on isobornyl acrylate, mixture of hydroxyethyl methacrylate with dipropylene glycol, and cyclohexyl methacrylate form charred layers with sufficient fire-protective and mechanical properties.
Optimization of costs for labor protection of the enterprise
Authors: Malaian Karpush , Myasnikov V , Balueva A 
Published: December 2019

Abstract
All The authors propose a justification for the distribution of the budget of labor protection (LP) of the enterprise on organizational-technical measures aimed at improving working conditions and safety and on social activities related to staff training and prevention of workers health. The accumulation of professional risk is considered, and the efficiency of costs for LP is estimated by reducing the rate of its accumulation, the change in the distribution of which can serve as the basis for flexible management of labor protection of the enterprise in order to reduce the level of professional risk. The increase in the effect of the cost of LP, determined by the criterion of reducing the rate of accumulation of professional risk, is very relevant in the development of LP management in the enterprise.
Fire technical properties of intumescent and ablative fire resistant glass
Authors: Gravit M , Klimin N , Dmitriev I , Karimova A , Fedotova E 
Published: December 2019

Abstract
Conventional glass materials are weak spots in building fires, and fire codes requires installing fire-resistant glass in specified places. Apart from assessing fire resistance of glass panels by standard tests, there are no universal standards in fire-resistant glass specifications. In standard fire resistance tests, the most relevant performance criteria of fire-resistant glass are integrity, insulation, and radiation. The chemical compositions of the glass products, which depend on the manufacturing method and the required fire resistance standards, are not listed in glass specifications. This article provides an attempt to use calculation method for calculation fire resistance of some types of insulated fire-resistant glass, and describe some specific defects of alkali-silicate gel filled glass. It is shown that recently developed ablative fire resistant glass has some advantage.
The automated system of models of management of information resources of higher education institution
Authors: Avdeeva M , Leonova N , Gomazov F , Strelcova E 
Published: December 2019

Abstract
The special importance is gained by questions of stability of the Russian economy. Strengthening of this stability in the conditions of information revolution was resulted in need of transition from “material” to the “intellectual” economy which is based on knowledge (knowledge based economy). In this regard a problem of formation of competences of the sphere of the higher education receives a priority by preparation of the engineering and scientific shots creating the main part of profit. The article deals with the quality of service in the libraries of the university. We propose the automated system of models of management of information resource, consisting of three complexes, allowing to simulate the process of care, foresee the results of management decisions taken and choose the best of them. The complex of economic-mathematical models of quality management of service is presented in a natation of UML. Proposed economic and mathematical models for assessing the quality of decisions. The process of calculating the ratio of the qualification level of staff and the corresponding service time is shown.
Evaluation of the probability of correct positioning of the beacon and its motion parameters in passive search and rescue systems
Authors: Yukhno S , Petrov Yu , Yakovlev V , Tanklevskiy L 
Published: December 2019

Abstract
In this article, the approach to evaluate the probability of estimating the range of the beacon with a given accuracy is proposed. To determine the range to the beacon, a set of Kalman filters is applied to the beacon bearing measurements according to the given hypotheses about its motion parameters. The calculation of the probability of the correct choice of a hypothesis is presented. The hypothesis with the minimum sum of squared residuals is considered without prediction errors, its expectation and standard deviation, respectively, are. The time, required to determine the range with the probability 0.9..0.95 is calculated according to the proposed method agrees with the results obtained by statistical analysis, performed over multiple data sets. The results of the simulation of the “frequency” graph are shown.
Methods for assessing safe seniority in high noise conditions
Authors: Salkutsan V , Russkova I , Faustov S 
Published: December 2019

Abstract
A method for estimating the maximum allowable length of service in high noise conditions based on the calculation of the allowable working dose when working in working conditions with exceeding hygienic standards, which is based on the “equal energy” rule applicable to any factor of the each working environment is presented. A method of calculating the dose of the permissible noise level during the entire seniority LCT is proposed, on the assumption of threshold permissible values of the sound level (equivalent sound level), which allows implementing an occupational safety management strategy, both through organizational measures (transfer to areas with acceptable noise levels) and the development of measures to improve working conditions and safety. The dose principle of hygienic rationing allows us to estimate the actual load on the employee’s sensory systems and the required number of days of rest or work with reduced noise levels. To solve this problem, in the presented methodology, analytical methods that are proposed, allows to count the number of days of rest (or work with a reduced dose of noise) during a shift, month or year depending on the value of the equivalent noise level LA and the duration of its impact.
Effect of temperature and residence time on the characteristics of torrefied food
Authors: Abdul Rahman R N U , Abdul Rasid R , Ismail M 
Published: December 2019

Abstract
Malaysia generated food waste (FW) is approximately 15 000 tons every day and expected to increase every year. Currently, Malaysia is applying the landfilling method to dispose all of the MSW which cause potential threat towards the environment and society. FW may be converted into more valuable products through reutilizing as a renewable energy source through torrefaction. The objective of this study is to investigate the effect of torrefaction temperature and residence time towards the characteristics of torrefied FW. The torrefaction process was carried out in a fixed bed reactor with continuous flow of nitrogen, at various torrefaction temperature (260 to 320 °C) and residence time (15 to 60 minutes). The torrefied FW was evaluated in terms of its mass yield, thermal behaviour and the produced functional groups through the Fourier transform infrared spectroscopy (FTIR). It can be observed that the higher the torrefaction temperature and residence time reduces the mass yield. Meanwhile, the FTIR spectra for raw and torrefied FW at different residence time was executed the functional group of C=C, C=O, C-O and C-H were present in sample. From this study, it is established that there were significant effects of both parameters towards the characteristic of FW.
Optimization of process parameters for bioethanol production from oil palm frond juice by Saccharomyces cerevisiae using response surface methodology as a tool
Authors: Zani S H M , Asri F M , Azmi N S , Yussof H W , Zahari M A K M 
Published: December 2019

Abstract
The aim of this research was to investigate the effect of temperature, medium initial pH and rotation rate on the production of bioethanol from OPF juice without nutrient and nitrogen source supplementation using Saccharomyces cerevisiae Kyokai No. 7 (ATCC 26622). A five-level-three-factor central composite design (CCD) was employed in this study and the central point of each process variable was chosen based on the best condition obtained from the one-factor-at-time (OFAT) method. The parameters ranges were set as follows; medium initial pH (5-9), temperature (27.5-37.5°C) and rotation rate (80-120 rpm). Bioethanol and residual sugars concentration were determine using High Performance Liquid Chromatography (HPLC). The optimum conditions for bioethanol production from OPF juice were achieved at medium initial pH (6.62), rotation rate (96.51 rpm) and temperature (33.03°C). Based on the validation experiment, the optimum bioethanol yield was 0.50 ±0.02 g/g sugars and this value was in close agreement with the model prediction where the difference was only 4.17%. Under the optimal conditions, the bioethanol yield obtained was 47.06% higher compared with non-optimized condition. The promising yield obtained in this study suggests that OPF juice can be used as a renewable and complete fermentation feedstock for bioethanol production.
Co-gasification of coal and empty fruit bunch in an entrained flow gasifier: A process simulation study
Authors: Deraman M R , Abdul Rasid R , Othman M R , Suli L N M 
Published: December 2019

Abstract
Co-gasification of coal and biomass is a proven method to improve gasification performance and a platform towards being independent of fossil fuel in power generation. Thus, this research was conducted to assess the feasibility of coal and EFB as fuels in co-gasification using Aspen HYSYS. A sequential model of an EFG was developed to predict the syngas composition and the optimum operating condition of the gasifier. The process was modelled with a set of five reactors to simulate various reaction zones of EFG in accordance with its hydrodynamics. The model considers devolatilization, char and volatile combustion, char gasification and water-gas shift reactions. The model prediction has exhibited excellent agreement with the experimental results. Three parameters of BR, Top and S/F were considered to account for their impacts on syngas composition in the process. The CE, CGE, PE and HHV were adopted as the indicators of process performance. The optimal values of BR, Top and S/F were 50%, 950°C and 0.75, respectively. While the value of CE reached above 90% and the maximum value of CGE, PE and HHV was obtained. This finding should be helpful in designing, operating, optimizing and controlling any co-gasification process especially in the entrained flow system.
Assessment of heat pumping technology in oleochemical fatty acid fractionation
Authors: Sidek N M , Othman M R 
Published: December 2019

Abstract
Similar to petroleum industry, major energy consumption in oleochemical plants is also dominated by separation process in order to obtain purified oleochemical cuts. Combination of the distillation column with heat pumping system has emerged as one of the most popular techniques in heat integration. Although heat pumping technology has been proven to be effective in petroleum separation, the research on this technology in oleochemical separation has not yet been discovered. Hence, it would be appealing to investigate the feasibility of integrating heat pump technology with distillation units in hopes of reducing energy usage in the separation of oleochemical products. In this study, two configurations of heat pumping system, namely direct vapor recompression (VRC) and bottom flashing heat pump (BFHP) are simulated in Aspen Plus particularly for fractionation of palm kernel oil (PKO) fatty acid. Proper selection of thermodynamic package is discussed in detail. Only three major components of PKO-based fatty acid are involved in the simulation in order to arrive at simple simulation and easy convergence. Simulation results indicates that both configurations of heat pump can be feasibly integrated with the distillation column. However, to satisfy the heating and cooling requirement, supply of makeup utility is necessary.