bluuebunny/crossref_metadata_2025 huggingface dataset:
Experimental Studies on Friction Stir Processing of Magnesium Alloy
Authors: Dinesh Babu P , Sabrish S , Janani M , Harini E , Marimuthu P
Published: December 2019

Friction Stir Welding (FSW) belongs to the solid state joining technique. In the present study, the effect of FSW parameters such as rotational speed and tool pin diameter on the weldability of ZK61A Magnesium alloy was investigated and the mechanical and micro structural characteristics of the welded specimens were analyzed at room temperature. Further, the tool wear was estimated with constant shoulder diameter. Radiographic tests were done to identify defects in the weldments.
Darcy–Brinkman–Forchheimer flow over irregular domain using finite elements method
Authors: Murali K. , Kesavulu Naidu V. , Venkatesh B.
Published: December 2019

The finite element method of solution with curved triangles to solve the three-dimensional, fully-developed Darcy–Brinkman–Forchheimer flow equation in channel with curved side is solved using quasi-linearization and Gauss-Seidel iteration method. Exhaustive numerical computation and numerical experimentation reveals the parameters’ influence on the velocity distributions.. A salient feature of the method adopted in the present paper is that it ensures that the errors are almost equally distributed among all the nodes. It is found that the irregular cross-section channel with upward concave boundary decelerates the flow. Numerical experimentation involved different order curved triangular elements and extensive computation revealed that the quintic order curved triangular element yields the desired solution to an accuracy of 10−5. The finite element method is found to be very effective in capturing boundary and inertia effects in the three-dimensional, fully-developed flow through porous media. Further, it succeeds in giving the required solution for large values of Forchheimer number when shooting method fails to do so. The method can be easily employed in any other irregular cross-section channel.
Influence of Kenaf on Mechanical Properties of Glass Epoxy Composites
Authors: Joshi Anant , Shivakumar Gouda P S , Savanur Santosh , Uppin Vinayak , Veereshkumar G B
Published: December 2019

Composite materials are replacing with traditional materials, because of its superior properties such as high tensile strength, low thermal expansion, high strength to weight ratio. Kenaf were processed by retting process then treated with sodium hydroxide and were cut using crusher. Mixing of kenaf fiber with glass is finding increased applications due to its versatility. Present study focuses on the development of kenaf glass fiber reinforced composites by the aid hand lamination technique. The composite is investigated for their mechanical properties such as tensile strength, flexural strength and impact strengths. The results indicated that the incorporation of kenaf fiber with GFRP can improve the properties. Further, the fractured specimens are analysed for their failure mechanism using optical microscopic study.
Microstructural properties of lead free BiMnO3 ceramic prepared by mechanochemical synthesis
Authors: Rahangdale Khushbu K , Ganguly Subhas
Published: December 2019

The present paper reports the synthesis of BiMnO3 (BMO) using Bi2O3 and Mn2O3 as initial powder mixture through mechanochemical synthesis route by a planetary ball milling. The powder mixture was intensively milled in atmospheric temperature to achieve crystalline powder of BiMnO3 (BMO). For structural analysis of the sample the X-ray diffraction (XRD) and Scanning electron microscopy (SEM) investigation was carried. The XRD analysis clearly shows the single phase perovskite structure having monoclinic symmetry with lattice parameter a=5.883Å, c=7.525Å and space group P121/C1. SEM images confirm the achievement of polycrystalline morphology of BMO ceramic with visible grain boundary. It is also found that the presence of agglomerated structure was reduced as the milling time increases. The particle size of starting BMO was somewhat proportional to the grain size. The enhancement in the values of relative density from 90% to 97% of the resulting ceramics was recorded when the sample milling time increases from 1h to 20h. Eventually, the dielectric characteristics of the BMO sample were studied. The dielectric behaviour at room temperature to a temperature of 200°C has been reported. The properties of the prepared ceramic powder signify for potential application as a multiferroic material with simultaneous control over piezoelectric and dielectric characteristics.
Finite Element Method to Solve Poisson’s Equation Using Curved Quadratic Triangular Elements
Authors: Shylaja G , Venkatesh B , Kesavulu Naidu V
Published: December 2019

The paper discusses the finite element method to solve Poisson’s equation using quadratic order curved triangular elements. We use quadratic order point transformation to solve the partial differential equation. We observe that with quadratic order as the discretization of the domain element is increased, the error of the solution decreases.
Radio Geometric graceful graphs
Authors: Meera K. N.
Published: December 2019

A one-one mapping f : V (G) → Z+ satisfying the condition

d
(
u
,
v
)
+

[

f
(
u
)
f
(
v
)

]

≥
d
i
a
m
(
G
)
+
1

, for every pair of distinct vertices in G is defined as radio geometric mean labeling of G. The maximum number assigned to any vertex of G under the labeling f is called its radio geometric mean number of f denoted rgmn
(f). The least value of rgmn
(f), taken over all such labelings f of G is defined as its radio geometric mean number and is denoted by rgmn
(G). Clearly, rgmn
(G) ≥ |V(G)|. Graphs for which rgmn
(G) = |V(G)| are defined as radio geometric graceful. In this paper, we find the radio geometric mean number of certain classes of graphs like sunflowers, Helms, gear graphs and show that they are radio geometric graceful.
Numerical Integration over arbitrary Tetrahedral Element by transforming into standard 1-Cube
Authors: Mamatha T M , Venkatesh B
Published: December 2019

In this paper, we are using two different transformations to transform the arbitrary linear tetrahedron element to a standard 1-Cube element and obtain the numerical integration formulas over arbitrary linear tetrahedron element implementing generalized Gaussian quadrature rules, with minimum computational time and cost. We also obtain the integral value of some functions with singularity over arbitrary linear tetrahedron region, without discretizing the tetrahedral region into P3 tetrahedral regions. It may be noted the computed results are converging faster than the numerical results in referred articles and are exact for up to 15 decimal values with minimum computational time. In a tetrahedral sub-atomic geometry, a focal particle is situated at the middle with four substituents that are situated at the sides of a tetrahedron. The bond edges are cos−1(−⅓) = 109.4712206…° ≈ 109.5° when each of the four substituents are the same, as in methane(CH4) and in addition its heavier analogs. The impeccably symmetrical tetrahedron has a place with point amass Td, yet most tetrahedral particles have brought down symmetry. Tetrahedral atoms can be chiral. Mathematically the problem is to evaluate the volume integral over an arbitrary tetrahedron transforming the triple integral over arbitrary linear tetrahedron into the integrals over a standard 1-cube using two different parametric transformations.
A Study on Steel Plate Shear Wall
Authors: Annapoorna B P , Boodihal Mohammed Ali
Published: December 2019

The main objective of this research study was to evaluate the parameters of stiffened and unstiffened steel plate shear wall under seismic loads. The scope of effort included simulating five unstiffened steel plate shear wall with varying thickness, three singly stiffened steel plate shear wall, and three doubly stiffened steel plate shear wall. The validation and simulation was done using software package ANSYS v16 using loads derived from ETABS. Overall, Unstiffened steel plate shear walls produced high in-plane and out of plane displacements which decreased with increase in thickness of plate; than singly stiffened followed by doubly stiffened steel plate shear walls. With introduction of stiffener in steel plate shear wall, the in-plane displacement values reduced by about 1%, and about 3% when doubly stiffened on the other hand the out of plane came down by 50% when stiffened singly and also when doubly stiffened. It was noteworthy that stiffener does not play any significant effect on any parameter except for out of plane displacement.
Effect of lanthanum zirconate thermal barrier coating on the performance and emissions of a diesel engine using biodiesel
Authors: Domakonda Vinay Kumar , Devendra Reddy P. , Farooq Shaik
Published: December 2019

An experimental Lanthanum Zirconate (La2Zr2O7) ceramic powder has been used as a thermal barrier coating material to study its effect on performance and exhaust emissions of a single cylinder diesel engine operated using diesel and biodiesel. Pongamia vegetable oil has been used to prepare biodiesel through transesterification process. Lanthanum doped thermal barrier coatings are found to be promising candidates for applications such as in diesel engines besides the conventional YSZ TBCs with lower thermal conductivity, high sintering resistance, low oxygen permeability and with catalytic activity. This experimental study has shown that the performance of the engine is improved significantly on the account of brake thermal efficiency and specific fuel consumption. Emissions, on the other hand are also improved, especially the smoke opacity which is significantly low at all Low Heat Rejection (LHR) operations.
Transient Analysis of a Blunt Body with Cylindrical Protrusion in Hypersonic Flow
Authors: Akshay N , Nagaraja S. R
Published: December 2019

Numerical analysis of a blunt body with protrusion in hypersonic flow having Mach number 8 is analysed using ANSYS-FLUENT. Transient analysis gives a better understanding of the flow field, separation of the flow from body, time taken for achieving steady state. 3D analysis has done. The variations of the pressure with respect to time at different locations on the body are obtained. The peak pressure at the separation point is 38% more than the steady state pressure. Pressure fluctuates inside the separation region.
Spectroscopic and Computational approach for the Structure - Property relationship of Hydantoin drug impurity : 1-methyl-5,5-diphenylimidazolidine-2, 4-dione
Authors: Anil Kumar S , Bhaskar BL
Published: December 2019

1-methyl-5,5-diphenylimidazolidine-2,4-dione (methyl phenytoin) is an intermediate impurity created en-route the commercial manufacture of epileptic drug phenytoin.Ab-initio computational modeling and spectrophotometric techniques are employed to examine molecular geometry and electronic structure to envisage possible structure-activity relationship in 1-methyl-5,5-diphenylimidazolidine-2,4-dione. Comparative studies show satisfactory consilience between theoretical and experimental approaches. According to DFT studies, the molecules are visualized to dimerize via hydrogen bonding. The two phenyl rings are not coplanar as evidenced by the dihedral angles between benzene rings and imidazole ring. The extent of intermolecular hydrogen bonding has been reduced due to methyl substitution at N1 and this assumes importance as anticonvulsant property is directly proportional to the extent of hydrogen bonding. A relatively high HOMO-LUMO energy gap of 5.9 eV implies good thermodynamical stability and a prospect of impurity being carried over during commercial drug manufacturing.Further, the presence of methyl substitution closer to the bio-toxic face opens up a prospect of title molecule being studied as an alternate drug with marked anti-epileptic action and less or no toxicity.
Analysis of heat transfer characteristics of nanofluid synthesized using green method
Authors: Vishnu Narayanan M , Rakesh S G
Published: December 2019

The use of additives in the base fluid is one of the techniques to strengthen the heat transfer with the amelioration in the field of nanotechnology. A new class of heat transfer fluids has been engineered, a base fluid (host) in which nano particles (guests) are dispersed and suspended stably. Researches have showed that these fluids exhibit higher thermal conductivity than the base fluid. As a result, the study of nanofluids has materialized as a new field of scientific interest and innovative application. The present work mainly focus es on the study of heat transfer characteristics and to analyze the thermal stability & other properties of nanofluid prepared by dispersing nanoparticles that are synthesized using green method. This work not only focuses on the heat transfer enhancement but also on the phenomena that are possible for this enhancement.
Study of the surfactants role in natural fibres reinforced composites for structural applications
Authors: Hallad Shankar A , Devangamath S A , Banapurmath N R , Hunashyal A M , Dhanalakshmi S , Ramadevi P
Published: December 2019

In this study, hemp fibres were used as reinforcements in polypropylene (PP) resin to form composite materials for structural applications. Adhesion between the fillers and holding matrix was enhanced using alkalisation, KMnO4treatments respectively on the fibre surface thus developed. Spectroscopic analysis such as Fourier transforms infrared (FTIR) and scanning electron microscope (SEM) was carried out to determine interferential adhesion and homogeneous distribution of fibres in the holding matrix. Based on the results obtained fibres treated with both NaOH and KMnO4 treatment showed better mechanical properties than the treatments done in isolation. Among the results obtained fibres specifically treated with specific co mposition of 5% NaOH an d 0.6% KMnO4 exh ibited better mechanical properties compared to those with treated and untreated fibre composite samples.
Bio-mediated Combustion Synthesis and Color Characteristic Studies of Y2O3:Tm3+ Nanoscale Superstructures
Authors: Venkatachalaiah KN , Nagabhushana H , Venkataravanappa M
Published: December 2019

Mimosa pudica(MP) plant extract was used to prepare Y2O3:Tm3+ (1-11mol %) nanoscale superstructure with nitrate source as precursors. The samples were characterized by advanced characterization techniques. The PXRD peaks indicates crystalline, no impurity peaks were present with body centre cubic structure of Y2O3. Photoluminescence emission spectra shows blue color emission at 358 nm excitation wavelength. The major peak of Tm3+ was at 453 nm and two very weak peaks were observed at ∼ 474 nm attributed to the transitions of 1D2 → 3 F4 and 1G4 → 3H6, res. The calculated color co-ordinates were matches to the NTSC blue color. Correlated color temperature was ∼ 4000 K. So the Y2O3:Tm3+ nanophosphor could be used for blue component in the warm WLED and SSL devices.
Synthesis and characterization of ecofriendly and large-area honeycomb-like Cu2ZnSnS4thin films for solar cell applications using chemical bath deposition method
Authors: Jirage Sandesh B. , Bhuse Vijaykumar M.
Published: December 2019

In view of care and concern for society to provide sustainable energy by renewable solar photovoltaic technology using various absorbers is being highly reliable. Among all absorbers, recently the Cu2ZnSnS4(CZTS) thin films have prompted the significant attention of researchers as low-cost and high-quality photovoltaic absorber semiconducting material owing to its high absorption coefficient, optimum band gap, nontoxic nature and naturally abundant elements with high expectations of greener synthesis and renewable solar to electrical conversion. Considering this eco-friendly approach we focus on synthesis, characterization and photo electrochemical application of Cu2ZnSnS4(CZTS) thin films by cost effective chemical bath deposition technique. The films were characterized using various techniques like XRD, scanning electron microscopy, optical absorbance, electrical conductivity, photoluminescence, and PEC studies. The investigation revealed a poly-crystalline, stable kasterite structure of CZTS thin films in a good stoichiometric and with a excellent uniform, large area typical honeycomb-like morphology.
Corrosion of stainless steels in acidic, neutral and alkaline saline media: Electrochemical and microscopic analysis
Authors: Seethammaraju Sahaja , Rangarajan Murali
Published: December 2019

This study presents how SS304 and SS316 corrode in saline media, including in the presence of acid and alkali, through an electrochemical and microscopic analysis. SS304 and SS316 samples were studied for their corrosion resistance in 1M NaCl, and in the presence of either 1M HCl or 1M NaOH. Potentiodynamic polarization studies were carried out to determine the corrosion potentials and currents. From the anodic polarization, regions corresponding to corrosion, passivation and transpassivation were identified. Samples were corroded at different anodic potentials corresponding to the different regimes and were analysed using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). In 1M NaCl medium, SS304 exhibits pitting and passivation whereas SS316 does not. Transpassivation occurs through intergranular corrosion that connects the different pits. Making the medium acidic results in much higher corrosion rates for both SS304 and SS316, but the corroded surfaces bear vastly different structures. SS304 surface forms deep pits with large intergranular cracks resembling chimney stacks. However, SS316 surfaces show dendritic morphologies of deposited corrosion products, further evidenced by a higher O/Fe ratio in EDX measurements. In alkaline media, SS304 shows evidence of pits on whose edges corrosion products are deposited while no significant pitting is seen with SS316.
Dielectric Resonator Antenna on Ba TiO3 embedded with TiO2 Nano composite for Wi-Fi applications
Authors: Suhailrashid S , Sreekala C.O. , Menon Sreedevi K.
Published: December 2019

A cylindrical dielectric resonator antenna (DRA) energized using microstrip line for Wi-Fi applications is discussed in this paper. The cylindrical DRA of 14mm diameter and 2mm height are fabricated using titanium dioxide (TiO2) nanoparticle embedded in high dielectric constant barium titanate (BaTiO3) material. It is found that the BaTiO3: TiO2 composite is very effective as a radiator. The fabricated DRA radiates in Wi-Fi frequency of 5.5 GHz with good reflection and radiation performance.
Effect of Mixed Ions and Ion Irradiation on Ionic Conductivity of Solid Polymer Electrolytes
Authors: Manjunatha H , Damle R , Kumaraswamy GN
Published: December 2019

It is a well known fact that conductivity in case of solid polymer electrolytes (SPEs) is due to hopping of ions assisted by the segmental motion of polymer chains. It is observed that the ionic conductivity in SPEs increases with increase in the concentration of ions. After certain critical concentration the conductivity starts decreasing due to the formation of ion pairs. In this work, an attempt is made to identify the concentration at which ion pair formation occurs and hence improve conductivity by incorporating two different ions (salts) in the polymer matrix. SPEs with mixed conducting species PEOxLiBryNaBr with different concentration of salts have been prepared and investigated. Also an attempt is made to modify the crystalline phase of the host polymer by low energy ion beam (Oxygen ion, O+1 with energy 100 keV) irradiation. These observations place ion irradiation as an effective tool in improving ionic conductivity in SPEs. Using X-ray diffraction spectra and the temperature dependent conductivity studies of SPEs, the effect of mixed ions and ion irradiation on the ionic conductivity of SPEs is investigated and presented.
Virtual non-contact atomic force microscope
Authors: Mohammad Reza Bahrami , Suvorov Vladimir
Published: December 2019

In this paper, the virtual atomic force microscope (AFM) is constructed on the basis of the component models to simulate the conventional and high-speed AFMs. A room temperature conventional AFM with its standard control system is used as a reference. The virtual machine operates in non-contact mode (NC-AFM). The cantilever is oscillated at or near its natural frequency with the amplitude of l nm to 100 nm above the sample. The tip-sample interaction changes the amplitude, frequency, and phase of oscillation. In amplitude modulated-AFM (AM-AFM), by measuring the tip vibration and extracting its amplitude, the control system actuates the piezo-scanner to achieve the amplitude setpoint. By defining a proper cost function, here settling time, optimum gain parameters for the control system are obtained by the particle swarm optimization algorithm, PSO. Simulations are performed in two steps: when only the Z-directional movement of the XYZ stage is considered and when raster motion is considered. The performance of the new AFM is compared with a conventional AFM via simulations.
The results of the defect formation control in welded joints during friction stir welding by acoustic emission
Authors: Stepanova K , Kinzhagulov I , Iuferev R , Levkova Y , Kovalevich A
Published: December 2019

Experimental studies of the acoustic emission parameters distribution with structural changes in a welded joint during friction stir welding (FSW) are presented in this work. The parameters of energy, amplitude, activity and median frequency distribution of acoustic emission signals characterize the presence of features in the plasticization processes in case of disturbance of uniformity of plastic flow of a material during defect formation imitation process. An approach, based on the analysis of the parameters distribution of acoustic emission (AE), for the creation of an automated non-destructive quality control system of welded joints during FSW in real time has been proposed.
Simulation of aerodynamic wind protection of oil platforms workplaces
Authors: Yakovlev P.V. , Piskunov V.M. , Andreev V.V.
Published: December 2019

The paper presents the results of a study of the effectiveness of aerodynamic windproof devices. Considered various options for the placement of wind protection relative to the deck and simulated wind speed and air movement trajectory. As a result of the analysis of the velocity fields, the best layout options for wind-proof devices have been proposed.
Modeling the influence of geometric errors of vertical-milling machines on the accuracy of the complex of treated surfaces
Authors: Anikeeva O.V. , Ivakhnenko A.G.
Published: December 2019

The actual problem of modeling the influence of geometric errors of vertical milling machines on the accuracy of machined surfaces is considered in the paper. For the first time, a mathematical model of the accuracy of vertical milling machines is presented when processing a complex of keyway surfaces. The model was developed on the basis of a variational method for calculating the accuracy of metal-cutting systems, which is a development of the well-known variational method for calculating the accuracy of machine tools. The results of modeling the influence of geometrical errors of vertical milling machines on the accuracy of the machined surfaces of the keyway are given. Directions for further research of milling accuracy modeling with variable values of machine tool geometries are proposed. The work is useful for researchers engaged in research of the accuracy of technological equipment.
High-alumina slurry waste metallurgy aluminium alloys - complex modifier of heat-resistant and refractory composites
Authors: Khlystov A.I. , Vlasov A.V. , Shirokov V.A. , Vlasova E.M.
Published: December 2019

The effect of aluminate slimes on the thermomechanical properties of heat-resistant and refractory composites has been investigated. The optimal content of nanotechnogenic raw materials in the studied compositions was revealed. It has been established that the replacement of expensive refractory powders (alumina, chamotte) with high-alumina industrial waste in general has a positive effect on the durability of refractories. The chemical components of aluminate sludges and the principles of their action on refractory compositions in the area of critical operating temperatures are given. The decrease in the water-cement ratio allowed in mineral compositions based on hydraulic binders to form plastic structures with enhanced rheological characteristics. The mechanism of the proceeding processes in refractory materials on phosphate binder is clarified.
Research of the possibility of producing finely divided materials from natural raw materials for reactive powder concretes by mechanochemistry
Authors: Abramov M.A. , Stepanov E.G. , Golyandin D. , Dobrokhotov V.B.
Published: December 2019

The results of mechanochemical activation of natural silica are presented in this paper. It is shown that disintegration activation allows the preparation of highly dispersed oxide powders.
Determination of technological residual stresses in the surface layer of parts with thin-walled elements during turning
Authors: Nikitin A V , Tarikov I Ya , Vasilkov D V
Published: December 2019

At manufacture of heavy-duty parts, one of the important factors ensuring their safety operation is directional formation of technological residual stresses, nature of distribution of the latter having direct effect on the reliability indices. Concept of the deforming ability of the technological residual stresses was formulated as the moment load intensity adjusted to the surface. The method was proposed for calculation of torques from the effect of the technological residual stresses’ deforming ability as applicable to discrete models of parts with thin-walled elements at turning. Methodical specifics of the computation scheme formation for elastic after-effect of the technological residual stresses’ deforming ability at machining were discussed. Variants of schematization for standard elements of the parts were presented. Pre-requisites were formed for solving the task of controlling residual deformations of parts with thin-walled elements at turning.
Study of the transients with the loss of field of the synchronous generator in the industrial electric power station
Authors: Sokolov A. P. , Gazizova O. V. , Kondrashova Yu. N.
Published: December 2019

One of the main trends of industrial power engineering today is the need to improve the reliability of power supply of responsible consumers along with the increase of competitiveness of products by reducing cost. These requirements are ensured by the widespread introduction of distributed generation sources. These include mini combined heat and power unit, gas turbine, gas engine and combined-cycle gas turbine power plants. At the same time, such changes significantly complicate both the power supply system and possible modes of operation. One of the possible emergency modes in such networks is the loss of field of the synchronous generator. The admissibility of such a regime is specified by regulatory documents. In such a case this generator goes into asynchronous mode and consumes reactive power from the network. The aim of this work is to study the operation of a synchronous generator for a certain time in the asynchronous mode as a result of a loss of field and to develop measures to ensure the admissibility of such a mode in a complex looped network. An algorithm has been developed for calculating the electromechanical transients of a synchronous generator, taking into account the loss of machine field. Studies are carried out for various operational modes of an industrial power plant, taking into account the initial load of the generator using the KATRAN software package. The calculation results allow determining the generator load with active power, at which the synchronous generator can operate in the asynchronous mode without excitation.
Technological approaches to increase the quality of lightweight concrete based on hybrid binders
Authors: Kazanskaya L.F. , Smirnova O.M.
Published: December 2019

The processes of structure formation of hardening compositions based on hybrid binders as well as the controlled change of these processes allow obtaining concretes with increased strength and durability, for example, lightweight structural concretes on porous aggregates. Control of the structure formation of such concretes allows improving the quality and operational reliability of buildings and structures, saving binders, expanding the kinds of raw materials and solving environmental and economic issues. The results of the experiments have showed that the fineness of the hybrid binder effect the properties of the contact zone between the expanded clay aggregates and the cement matrix including the formation of calcium hydrosilicates on the surface of expanded clay gravel, which increases the adhesive strength. This leads to the increase of the quality of lightweight concrete based on expanded clay gravel.
Integrated management systems as a basis for sustainable development of the organization
Authors: Velmakina Yu.V. , Vasiliev V.A. , Chernogorskiy S.A.
Published: December 2019

The definition of integrated management systems is considered in the paper from the point of view of various authors. The purpose of the paper is to develop a method for determining the possibility of hiring a candidate based on knowledge of the likelihood of selection signs. To determine the possibility of hiring a candidate, a system of independent informative features was developed and the frequencies of their occurrence in the workers’ questionnaires with positive or negative assessments of their work activity by the head were established. A distinguishing criterion is proposed and its threshold values are selected. A program that helps a personnel officer to make a decision on hiring a candidate is developed. Confidence probabilities for decisions are established.
Formation of approaches to the value added distribution in industrial clusters
Authors: Filimonenko I.V. , Moskvina A.V. , Likhacheva T.P. , Kharitonova M. Y.
Published: December 2019

The problem of formation and development of the system of relations between partner companies in industrial clusters on the basis of determining the value chain as an indicator of its current performance and potential development opportunities in the future. The key prerequisites for the emergence of the problem were the emerging trends in the activation of the processes of integration interaction of companies within the created network structures. The peculiarities of their coordination mechanisms, power distribution and value extraction influence the market positioning of each company and the network as a whole. They also determine the direction of their strategic development. From these positions, there is a need to create an analytical database for each company belonging to the cluster or their “portfolio”, in order to make subsequent strategic decisions on the expansion of the cluster through new participants, the development of existing or even non-cooperation. The study identified the entire list of tasks related to the formation and management of the portfolio, however, the emphasis is on the diagnosis of the partner network, which offers the design of the portfolio of the cluster. The specificity of the industrial cluster in which there is always a leading company or a key link of partner companies that manage the value chain of each member of the cluster through the supply of raw materials or intermediate products, indirectly affecting the resource base of their development. The portfolio approach allows to distribute all participants of the cluster according to their contribution to the creation of added value of the cluster, to assess their own resources to support current activities and innovative development in the future, and to determine the feasibility of redistribution of added value at the expense of other members of the cluster and the leading company. The portfolio approach at the same time provides a basis for assessing the value of products manufactured by the cluster companies at the created or added value relative to the raw materials used by them. Comparing them with the prospects of market development improves the quality of decisions on structuring the portfolio of cluster members. The approach adopted in the study makes it possible to expand the understanding of the interaction of cluster members in the value chain, creating a methodological basis for the formation of a portfolio and access to the adoption of a whole complex of strategic decisions. Applied aspects of the research are considered on the materials of the industrial cluster “Technological valley” organized on the basis of JSC “RUSAL”. The theoretical and methodological basis of the study was the works of domestic and foreign scientists in different fields of knowledge from marketing, Economics, organizational theory to strategic management. The study used methods of comparative statistical analysis and expert assessments.
The development of active control to improve the efficiency of product quality problems solving machining
Authors: Kozlovsky V , Aidarov D , Kleimenov S , Zayatrov A , Vakhnina V
Published: December 2019

The paper presents the results of the development and implementation of a promising system of active quality control of products for machining operations in the context of mass production of automotive vehicles.
Application of qualimetry methods for quality assessment of production processes at components suppliers enterprises
Authors: Kuznetsov A V , Vitchuk N A , Antsev Yu , Sabinina A L
Published: December 2019

It is practically impossible to efficiently manage the quality of the production process without determining the quantitative values for the indicators of its properties. Assessing the quality of the production process on a single, even decisive, indicator gives a one-sided, limited characteristic of the process, usually with a large number of properties. Therefore, for almost any process, especially for complex and multi-operational ones, it is necessary to carry out a comprehensive assessment on several parameters. In this regard, the indicator of the quality of the production process can be a complex, comprehensive indicator, depending on the single indicators of individual properties of the process. Such indicators include the indicator of continuity, the indicator of specialization, the indicator of plan fulfillment, the indicator of defect-free production, the indicator of progressivity, and the indicator of technical and economic efficiency.

The purpose of the study is to develop a methodology to use qualimetry methods for assessing the quality of industrial processes at industrial enterprises.

The objectives of the study: to determine the stages of qualimetric assessment of the quality of production processes; to develop the methods for calculating individual and integrated indicators of the quality of production processes; to practically implement the proposed stages of qualimetric assessment of the quality of production processes.

Research methods: qualimetric assessment methods, including expert method (preference method), integral assessment method.

Results. Indices that can act as single indicators of the quality of the production process are listed. The method to calculate the comprehensive indicator of the quality of the production process is shown on the example of the production process of manufacturing pipelines for gas turbine engines.

Findings. The proposed methodology for qualimetric assessment of the quality of production processes can be used when improving processes, and a comprehensive indicator of the quality of a process can act as a criterion for the efficiency of ongoing improvement activities.
The level of generalized technology readiness of the Smart House automation systems
Authors: Kalashnikova O V , Petrunina A E , Tsygankov N S , Moskalev A K
Published: December 2019

The article assesses the Technology Readiness Level (TRL) according to the developed TRL checklist. The TRL approach has been applied to analyzing the technology readiness level of a Russian start-up company producing systems of multisensory and multifunction devices for Smart House. The authors approbated the modified TRL methodology, which made it possible to evaluate the readiness of technologies’ integration among themselves and to get a generalized assessment of the readiness of the technologies’ system – Integration Readiness Levels (IRL). It has been proved that the System Readiness Level (SRL) of technology corresponds to the design concept stage. Taking into account indicators and means of quality assurance at the stages of design and initiation of such production is highly relevant.
Natural cold milk cooling system
Authors: Kozlovtsev A.P. , Korovin G.S.
Published: December 2019

Ideal «smart» technologies in the dairy industry are low-cost, versatile, reliable and easy to use, focus on solving the problem. Such technologies provide accessible information that can be quickly implemented. One of the areas of application of the technologies under consideration is the technology of cooling milk by natural cold. We propose a device for protecting the structural elements of the pool, which does not require manual labor, and works automatically with high reliability of operation. Before the start of operation of the ice storage facility, when the summer season begins, the surface of the ice storage facility must be insulated, covered with any thermal insulation material. Such a method of protecting the structural elements of the ice storage facility will completely eliminate the destruction.
Method of cleaning from the carbon deposits of the surfaces of the elements of internal-combustion engines without their unbuttoning
Authors: Roslyakov A , Balakin A , Vlasova N , Klassen N
Published: December 2019

A review of existing technologies for cleaning carbon deposits from machine parts and mechanisms working in contact with hydrocarbon substances (fuel, lubricant, heating agency) at a wall temperature of 120 ° C to 350 ° C shows the diversity of such deposits in chemical composition and physical properties. Carbon deposits are divided into easily removable and difficult to remove deposits. Soot (smoke black) belongs to easily removed carbon deposits; varnish and coke are difficult to remove deposits. Soot is a product of incomplete combustion of fuel and includes carbon, light hydrocarbons (up to 30% by weight) and in small quantities various compounds, including carcinogenic. Lake and resinous deposits are carbon deposits that form as a thin layer, firmly held on the surfaces of the channels. Lake is a product of liquid-phase oxidation and consists of 20 … 40% of carbon molecules and 60 … 70% of hydrogen molecules. Coke (or coke deposits) are black solid carbonaceous substances consisting mainly of a mixture of carbon molecules and high-molecular-weight hydrocarbons (80%) and hydrogen molecules (20%). The most common methods of cleaning machine parts from various kinds of pollution and sediments are physical, chemical and chemical-thermal methods. Experimental work has been performed to evaluate the effectiveness of these methods. The experiments were carried out on an open loop installation with a flow reactor. Replaceable stainless steel and high-temperature alloy tubes were used as a reactor. The regime parameters during the experiment were maintained unchanged, and the temperature state of the reactor was monitored at specified intervals.
Analysis of the publication activity of agricultural universities
Authors: Gazizulina A. , Samorukov V. , Suslov E. , Glushkova A.
Published: December 2019

For the analysis of publication activity there scientometric databases. The most famous international scientometric databases are the Web of Science and Scopus. These databases allow analyzing the publication activity of a scientist, scientific groups. Scopus and Web of Science allow you to conduct a scientific search on topics of interest, provide information on the citation of articles, include profiles of organizations. The article discusses the main scientometric indicators. The main scientometric indicators include H-index, SJR, SNIP, Impact Factor, CiteScore, Citation Count, Field-Weighted Citation Impact (FWCI). According to these indicators, the activities of both the individual scientist and the organization as a whole are evaluated. The article reveals topical issues of the state of publication activity of agrarian universities. The goal of the study is to analyze the number of publications by authors of leading universities in scientific journals, indexed in Scopus and the Web of Science, and the distribution of the number of publications in scientific fields to identify the main trends in the development of science in the agricultural sector. The leading universities selected for the study are QS World University Rankings by Subject: Agriculture & Forestry and Veterinary Science. The study analyzes the publication activity of agricultural universities. A model for assessing the quality of publications of a particular scientist or/and scientific groups has been developed. This model is designed to develop adequate measures to stimulate publication activity. The model allows to develop a strategy of publication activity aimed at achieving high places in international rankings of higher educational institutions. The paper proposes a risk classification of assessing the publication activity of a scientist.
Some features of chum salmon biology (Oncorhynchus keta) in Inya river (the sea of Okhotsk)
Authors: Matrosova I.V. , Rybnikova I.G.
Published: December 2019

Some biological indicators of chum salmon producers that spawn in the Inya river (Khabarovsk Territory, Sea of Okhotsk) in 2013-2014 have been studied. A comparative analysis of dimensional characteristics showed that in 2013, the range of changes in the length of chum salmon was higher (from 51 to 73 cm), while the dynamics of changes during the spawning season differed. Weight indices of chum salmon were higher in 2013. During the spawning season, both in 2013 and 2014 the average values of the mass of chum salmon decreased (in 2013 from 1.5 to 5.5 kg, in 2014 - from 2.0 to 5.0 kg). The chum salmon was harvested at the age from 2+ to 5+ years in 2013-2014. Fish prevailed at the age of 3+ years. The average value of the individual absolute fecundity was higher in 2013 (2412 ± 62 units) than in 2014 (2180 ± 83 units)
Methods for obtaining the feed additives from the starfish of the sea of Japan
Authors: Shadrina E.V. , Maksimova S.N. , Poleshchuk D.V.
Published: December 2019

The results of scientific studies on the justification of the use of starfish of the Sea of Japan, Patiria pectinifera and Evastaerias echinosoma, in the technology of feed products are presented. The biotoxicity level of the studied objects was evaluated, its dependence on the season was determined. Two methods for the production of feed additives from starfish were defined, taking into account the bio-toxicity of starfish and the destination of finished products. The method of enzymatic hydrolysis (using the proteolytic enzymes) was recommended for non-toxic raw materials for obtaining the biologically valuable protein-mineral, protein and mineral feed additives. The method of combined hydrolysis (enzymatic in combination with thermal) allows the use of raw materials, characterized as “biotoxic”, with the aim of obtaining the safe protein and mineral feed additives. Technological parameters of the enzymatic (type and activity of the enzyme preparation, temperature, duration of hydrolysis and pH of the medium) and thermal (temperature, duration, pressure) hydrolysis methods are scientifically substantiated. Developed methods for the production of feed additives from starfish of the Sea of Japan provide feed additives that differ in chemical composition and purpose.
Features of application of bimoment theory of V.Z. Vlasov in the calculations of reinforced concrete bar structures
Authors: Balushkin A.L.
Published: December 2019

In this paper, an adaptation variant of the “deformation model” is proposed for estimating the parameters of the stress-strain state of a reinforced concrete bar element with flexible discrete reinforcement, taking into account the deplanation of concrete and the features of contact interaction between reinforcement and concrete. Basic principles of the bimoment theory of solid rods of V.Z. Vlasov are used to assess concrete deplanation.
Improving the quality of pyrolysis products through preliminary thermal treatment of woody raw materials
Authors: Mukhametzyanov S R , Safin R R , Ilalova G F , Khasanshin R R , Shaikhutdinova A R
Published: December 2019

Rational processing of multi-ton wood and plant waste with the production of promising products is an important task. One of the approaches to solve this problem is the pyrolysis of solid organic waste with obtaining the secondary liquid useful products in the form of raw bio-oils or charcoal suspensions.

In this regard, the work investigates the effect of pre-heat treatment of shredded wood on the mass yield of products processed by fast pyrolysis technology. As a result of the conducted research, it is revealed that the preliminary heat treatment has practically no effect on the mass yield of pyrolysis products. However, the output of the elemental composition of biomass changes: the content of carbon and hydrogen increases, the amount of oxygen decreases, the proportion of nitrogen remains unchanged, that improves the quality of the obtained pyrolysis products as raw materials for subsequent use in chemical technology.
Estimation of the influence of variations in the dimensional parameters car’s generator active zone set of a on its technical characteristics, through elasticity coefficients (influences)
Authors: Kozlovsky V , Aidarov D , Ermakov V , Kolesov S
Published: December 2019

the active zone of an electromechanical transducer (ET) contains several tens of geometrical parameters, each of which has a definite influence on the technical characteristics of the generator. When building a computer model, it is impossible to reflect the influence of each single input parameter on the output. Therefore, we propose to introduce a quantitative assessment of the influence of variations in all the geometric parameters of the active zone of an electromechanical transducer on the electromagnetic parameters of technical characteristics, and then select the most significant ones.
Actualization of the quality of production assessing problem at machining processes
Authors: Kozlovsky V , Aidarov D , Zayatrov A , Vakhnina V
Published: December 2019

The article analyzes the existing approaches to assessing the quality of mechanical processing products using inprocess gages with the actualization of the problem of improving such systems, by improving the hardware and software of statistical data analysis.
Comparative study of corrosion resistance of sprinkler sprinklers of domestic and foreign production
Authors: Vasilieva M , Zybina O , Balabanov I , Vasiliev M
Published: December 2019

This document presents the results of tests of corrosion-resistant sprinkler irrigators. The influence of the method of manufacture and the composition of the alloy housings on the resistance to aggressive media is shown. A comparative analysis of the requirements and test methods of domestic and foreign certification authorities was conducted. Revision of the sprinklers structure that were sent for certification to fm global was carried out.