bluuebunny/crossref_metadata_2025 huggingface dataset:
Effects of added Secondary Dielectric material on the Performance of a Microstrip patch Antenna
Authors: Bhanu chander U , Prakash P , Piramasubramanian S , Ganesh Madhan M
Published: December 2019

Micro strip patch antennas are normally fabricated on the surface of a dielectric material. Due to various reasons, the replacement of the surface material and modifications in area are not possible, once the antenna is fabricated. In some cases, the operating frequency and bandwidth of the antenna needs to be altered without changing the substrate. This paper investigates a dual dielectric patch antenna and analyses the performances of the antenna under the combined dielectric layers inside the cavity. Initially, a patch antenna is designed for a resonant frequency with a widely used dielectric material, FR4 and after which another dielectric layer is added. The performance of the antenna is evaluated using Method of moments solver in ADS software. The thickness sharing percentage of the secondary dielectric material was linearly increased from 10% to 90% in simulation. The analysis shows an emergence of another band due to the introduction of secondary dielectric layer. Measurements also confirm the simulation results and notable change in reflection coefficient with bandwidth enhancement is observed.
Structural and electrical properties of lead-free Ba0.85Ca0.15Zr0.1Ti0.9O3 ceramic
Authors: Vishnunarayanan S. , Vaishnavi K S , Suresh Pittala , Anil Kumar P S
Published: December 2019

Lead-free Ba0.85Ca0.15Zr0.1Ti0.9O3 (BCZT) ceramic has been prepared by solgel synthesis method. The effect of sintering temperature on the structure of BCZT ceramic was investigated. X-ray Diffraction studies show the suppression of secondary phase TiO2 with an increase in sintering temperature. The formation oftetragonal-orthorhombic morphotropic phase boundary is observed at the sintering temperature of 1350 °C. Polarization (P) versus electric field (E) measurementshows a remnant polarization of 1.32 µC/cm2 and coercive field of 4.33 kV/cm.
Solar powered desktop CNC machine for fabric and paper cutting
Authors: Pillai Sarun P , Abhiram B R , Kumar Akshay S , Ashish U S , Harikrishnan G
Published: December 2019

In the modern era Computerized Numeric control (CNC) machines are widely used in most of the industries around the world. Nowadays this technology has been used in almost all industries for different operations like cutting, milling, welding, etc. This paper presents the design and manufacturing of a solar powered, portable LASER CNC machine for cutting paper and fabric. The design procedure includes the calculations for finding torque required to run the machine, Factor of Safety etc. Modelling and analysis of the machine is carried out using soft wares like Solid Works and Ansys. The electronic circuit included in the assembly will convert the G-Codes into movements of CNC machine. Incorporation of Solar panels into the assembly helped to make this CNC machine work on clean energy. The results show that the machine is feasible at a reasonable cost for applications where speed and repeatability is achieved while not compromising on accuracy.
Effect of hole doping on the structure and magnetic properties of hexagonal Zr0.2Lu0.8FeO3 ceramics
Authors: Dua S , Pittala S , Anil Kumar P S
Published: December 2019

Zr4+ doped multiferroic LuFeO3 (LFO) samples were prepared by a sol-gel reaction method and the effect of doping on structural, electric and magnetic properties are evaluated and compared with pure LFO. X-ray diffraction and Rietveld refinement confirm that the pure and Zr doped LFO exists in the hexagonal crystal structure with space group P63cm. The unit cell parameters and the volume of Zr0.2Lu0.8FeO3 (ZLFO) are greater than that of the undoped LFO. Magnetic measurements for ZLFO sample show a weak ferromagnetic-like behaviour at room temperature with M
r ∼ 0.013 emu/g and finite coercivity. Hence, the paramagnetic LFO transformed to the weak ferromagnetic at room temperature upon Zr doping.
Improved Grain distribution in polymer thin films after electric polarization
Authors: Pandey C K , Pandey Vineet K , Bajpai Manisha , Srivastava Ritu , Shukla Gyanendra P , Dixit C K , Dhar Ravindra
Published: December 2019

In this research, the effect of electric polarization on the kinematics and distribution of grain growth and grain size respectively in organic thin film of poly (2-methoxy-5-(2-ethylhexyloxy)-1, 4-phynylenevinylene) MEH-PPV conducting polymer have been studied. An atomic force microscope was used to measure the grain size of the MEH-PPV thin films. We developed surface morphological data and analyzed. The data shows major asymmetric grain growth (from spherical grains at room temperature to lingered needle like-shapes after polarization) under an application of electric field during cooling of polymer film. The grains show evidence of highly ordered, domain-oriented arrangement of MEH-PPV grains after polarization.
Covalent functionalization and characterization of Single-walled carbon nanotubes with Cu (II) complexes of meso-tetra(4-aminophenyl)porphyrin
Authors: Veetil Vyshnavi T , Prabhavathi G , Yamuna R
Published: December 2019

5,10,15,20-tetra(4-aminophenyl)porphyrinatocopper(II) [CuTAP] was covalently linked via amide bond with SWCNTs. Notable changes in the FT-IR spectra reveal the covalent linking of the porphyrin chromophore with SWCNTs. Further, covalent functionalization was confirmed by the hypsochromic shift of this nano-hybrid in the UV-visible spectra as compared to that of pristine CuTAP. 38 % weight loss observed in the TGA due to the extent of Cu-TAP functionalization. Morphology study of this nano-hybrid reveals the tubular structure, which is retained even after covalent functionalization. SWCNT-CuTAP nano-hybrid shows the hypsochromic shift and hypochromic shift compared to reported TAP or Zn-TAP due to Cu metal ion substitution.
Synthesis and Characterization of Shape Memory Polymers
Authors: Ranganatha Swamy M K , Mallikarjun U S , Udayakumar V
Published: December 2019

Shape memory polymers (SMPs) have gained a lot of importance in essential and basic research to modern and common applications since they have risen as a practical and proficient other option to understood metallic shape-memory composites. Among them, shape memory polymers claim assorted applications, for example, aviation, vehicles, biomedical, apply autonomy, sensors and actuators because of adaptability in union with various kinds of atomic plans by changing their synthesis and characterization methods. In this paper, the blend and portrayal of shape memory polyurethanes, in light of two-advance polymerization, is clarified. The hard portion of SMPU was made out of diisocyanate and a chain extender. Further, the delicate fragment was set up by polyols with various molecular weights. Contingent upon the structure of the integrated polyurethanes, the materials introduced diverse properties. Portrayal was performed by methods for TEM and X-Ray diffractogram (XRD). Moreover, mechanical properties and shape memory impact were additionally controlled by shape recovery test and Dynamic Mechanical Analysis (DMA).
Design and simulation of fluid flow in paper based microfluidic platforms
Authors: Madhu Nidhin T , Resmi P E , Pradeep Aarathi , Satheesh Babu T G
Published: December 2019

Computational simulation for the fluid flow in a paper based microfluidic system was performed and was experimentally validated in this work. Comsol Multiphysics based simulation was performed and the module used was species transport in porous medium. Two separate simulation for the reagent distribution and the interaction of sample with the immobilized reagent in paper based microfluidics devices were carried out. This was performed by varying the parameters such as adsorption constant, diffusivity and average velocity of fluid in the porous medium for finding the concentration profile. Finer mesh were used for the simulation which gives more accurate results with less computational time. The reagent distribution was experimentally validated by dropping methylorange indicator over Whatman filter paper.
Fluorescence Imaging of E. coli using CdSe Quantum Dots
Authors: Mohan Drishya , Pathak Abhishek , Resmi P E , Suneesh P V , Satheesh Babu T G
Published: December 2019

Rapid and reliable method for the selective detection of pathogenic bacteria is critical in environmental monitoring, disease control, food safety and for the diagnosis of infectious diseases. In this study, we have synthesized hydrophilic fluorescent CdSe Quantum dots (CDSe QDs) and characterized using UV-Vis, IR and fluorescence spectroscopy. Crystallinity of the synthesized Qdots were analysed using XRD. As synthesized CdSe QDs were used for the imaging of buccal epithelial cells and pathogenic bacteria. Selectivity of CdSe QDs to detect E. coli was improved by the functionalization of QDs with glycerol. Easy imaging steps and decreased imaging time with the current procedure shows the potential for biomedical imaging.
Effect of Streamline Curvature on Heat Transfer in Turbulent Flow over Backward Facing Step
Authors: Sajesh P , Jayakumar J S
Published: December 2019

The present investigation is to find the enhancement of heat transfer in the recirculation region when additional centrifugal forces due to streamline curvature are imposed on to the shear-layer. Backward Faced Step (BFS) have got great importance to study the separated and recirculating flows and their heat and mass transfer effects due to its geometrical simplicity. The effects of the radial pressure gradient existing in case of the curved stream line and how it affects the turbulence are investigated in this present study. The stabilizing and destabilizing effects with heat transfer have been studied in this paper for three different curvatures (flat, concave, and convex). Numerical results obtained by the use of the open source code OpenFOAM-3.0.1 is compared with the experimental results. The three-dimensional analysis has been done using an aspect ratio of 18 (AR=18:1) at Reynolds number based on step height as 80000. The distribution of Nusselt number (Nu), skin friction coefficient (Cf), and coefficient of pressure (Cp) were found on the bottom wall with close heed. The results show that the convex surface stabilizes the flow whereas the concave surface introduce more disturbances and destabilizes the flow.
Thermo-elastic free vibration analysis of functionally graded flat panel with temperature gradient along thickness
Authors: Ranjan S , Khan R , Dash S , Sharma N , Mahapatra T R , Panda S K
Published: December 2019

In this paper, the free vibration behavior of functionally graded (FG) flat panels subjected to temperature gradient along the thickness direction is investigated by utilizing the temperature independent as well as dependent material properties. The FG panels are modeled using ANSYS commercial package in the framework of first-order shear deformation theory. The convergence and the validity of the present model have been established by comparing the present results with the benchmark results available in published literature. Subsequently, the influence of elevated temperature load, aspect ratio, thickness ratio, and support conditions on the non-dimensional fundamental frequency is investigated by varying the gradient index of the FG panel. The temperature and the consideration of the temperature dependence of the material properties is found have significant influence on the fundamental frequency of the FG panel. The effect of other design parameters on the natural frequency of the FG flat panel under thermal environment has also been examined and discussed in detail.
Surface modification of Ni-hard 4 cast iron with titanium using GTA heat source
Authors: Raghul Anandh K.S. , Thilipkumar K. , Saravanan R.
Published: December 2019

Ni hard 4 cast iron has high strength and wear resistance material used in pipe fittings, concrete mixture, etc. In this study, improve the surface property like hardness, wear resistance of Ni hard 4 cast iron and adding alloying element like Titanium grade 2 (0.6mm) sheet on the surface using Gas Tungsten Arc as heat source. The hardness was taken at the base and modified area and it is increased from 597.5 HV to 1435 HV. Wear rate was found to be 4.7 for base and 0.15 for modified layer. The wear resistance is improved because of the formation of titanium carbide hard phase in the modified layer. The titanium carbide phase is formed and it was observed by XRD analysis. In the elemental composition analysis the presence of titanium 10 wt% was observed in the modified area.

© 2018 Elsevier Ltd. All rights reserved.

Selection and/or Peer-review under responsibility of International Conference on Advances in Materials and Manufacturing Applications [IConAMMA 2018].
2D Higher order triangular mesh generation in irregular domain for finite element analysis using MATLAB
Authors: Devi Supriya , Nagaraja K. V. , Jayan Sarada , Smitha T. V.
Published: December 2019

This paper presents an automated mesh generation for straight and curved sided irregular domains with unstructured two dimensional higher order triangular elements. The present higher order (HO) scheme has been implemented on the basis of subparametric transformations which are extracted from the nodal relations of parabolic arcs especially used for the curved domains. This new restructured meshing scheme is based on distmesh2d introduced by Persson and Gilbert Strang. In this work a higher order triangular mesh for two irregular domains star shaped domain and a circle inscribed in a rectangle has been constructed. These in turn is able to find its application in abundant flow problems and thermodynamics. Present innovative meshing scheme provides a refined and improved high quality meshes for these domains and produce accurate results of the node position, boundary edges and element connectivity for the discretized element. This is an advantage in executing finite element method with less computational efforts in practical engineering applications over the irregular domains.
Mesh generation techniques for numerical integration of arbitrary function over polygonal domain by finite element method
Authors: Shivaram K.T. , Jyothi H.R.
Published: December 2019

In this paper, a new approach is introduced for approximating two dimensional surface integral proble ms numerically over a convex, non convex reg ions such integrals are typically occur in boundary element method (BEM), the approach given here is domain discretized method by influence of quadrilateral mesh generation technique, then apply Gauss Legendre quadrature rule to generate Gaussian points over convex, nonconvex region. The performances of this method are illustrated with numerical examp les.
Exploration of selected room temperature magneto caloric materials using COMSOL multiphysics
Authors: Gombi Shrirang Mohan , Sahu Debjyoti
Published: December 2019

Estimation of magneto-caloric effect is crucial to determine a material’s suitability for the desired operating conditions. The magneto-caloric effect can be measured in two ways-the magnetic entropy change and the adiabatic temperature change. These parameters are the prerequisites in evaluating a magnetic refrigeration system. In this work, an application is developed and tested for 3 materials (one Gadolinium and two Lanthanum alloys) using COMSOL multiphysics to estimate the final temperature of a Magneto-Caloric Material (MCM). The duration of the magneto-caloric effect is compared amongst 4 different cases of magnetic field change. Among the selected materials Gadolinium shows the highest adiabatic temperature difference of 12K at a field change from 0 to 5 tesla.
Experimental Investigation of Performance and Emission of CI Engine using Alumina Nanoparticles with Waste Plastic Oil and Honge Bio Diesel
Authors: Ramesha D K , Manjunatha  , Bharath L , Deepak kumar T , Lakshminarayana N
Published: December 2019

Demand for fuel and the use of petroleum products are increasing day by day which causes serious problems such as petroleum depletion, environment degradation etc. So biodiesel is a good alternative for conventional diesel fuel. By using biodiesel there are also some disadvantages such as high oxides of nitrogen, high fuel consumption and higher density. To overcome this problems from biodiesel using additives. Additives play an significant role in enhancing the properties of biodiesel. In this context, oxygenated additives such as Alimina which are rich in oxygen content are used.

Biodiesel is obtained from honge oil by transesterification process and waste plastic oil is obtained by pyrolisis process. The experiment work is done by a CI engine using honge biodiesel, waste plastic oil and alumina nanparticles as an additive. The present investigation was to study the combustion and performance characteristics of all the blends by compare them with diesel. Experimental results show that performance and combustion characteristics improved with B20 biodiesel blend with WPO(waste plastic oil) and with or without nanoparticles as additive. The thermal efficiency will increase and SFC( Specific fuel consumption) is better in case of oxygenated additive blend. Considerable reductions parameters like carbon monoxide, unburned hydrocarbon and increases in nitrogen oxide emissions are attained while using B20 biodiesel blend and B20 biodiesel blend with waste plastic oil compared with diesel. However there is a significant reduction in CO, UBHC and NOx emission parameters for B20 biodiesel blend with WPO and nanoparticles as an additive.
An extension of golden section algorithm for n-variable functions with MATLAB code
Authors: Sandhya Rani G , Jayan Sarada , Nagaraja K V
Published: December 2019

Golden section search method is one of the fastest direct search algorithms to solve single variable optimization problems, in which the search space is reduced from [a, b] to [0,1]. This paper describes an extended golden section search method in order to find the minimum of an n-variable function by transforming its n-dimensional cubic search space to the zero-one n-dimensional cube. The paper also provides a MATLAB code for two-dimensional and three-dimensional golden section search algorithms for a zero-one n-dimensional cube. Numerical results for some benchmark functions up to five dimensions and a comparison of the proposed algorithm with the Neldor Mead Simplex Algorithm is also provided.
Experimental Analysis of a Solar Still Coupled with Heat Pipe, Evacuated Tubes and Compound Parabolic Concentrators
Authors: Vivek G , Ratheesh R , Mukesh R , Sajan G , Haritha R , Yashaswini C , Kotebavi Vinod
Published: December 2019

Rural enclosures usually present themselves with poor access to clean and practicable water, despite this drawback, they still do receive a generous amount of sunlight. This sunlight can be used to purify the water. In this work, a pyramid type solar still is built and is coupled with heat pipe placed inside the evacuated tubes. To increase the area of solar energy collection compound parabolic concentrators (CPC) are used. To increase the solar radiation absorption, coating is done on the inner side of the basin and black stones are placed inside the basin. Using tap water as feed, the performance analysis is analyzed under three modes of operation, (i) Still alone, (ii) Still with heat-pipe and evacuated tubes and (iii) Still with Heat-pipe, evacuated tubes and Compound Parabolic Concentrators. The overall thermal efficiencies for the three above mentioned modes of operations are observed to be 23.14%, 23.48% and 23.87% respectively. The salt content is reduced by 98.3%.
Comparison Study on Fuel Briquettes Made of Eco-Friendly Materials for Alternate Source of Energy
Authors: Vivek C P , Rochak P V , Suresh Pillai Sagar , Raghavendra Ravi Kiran K
Published: December 2019

The access to energy is necessary to sustain human life and to achieve overall economic, social and environmental aspects of human development. Always there is a shortage of energy and hence there is constant need to search for alternative form of energy, which is new and totally different form from conventional traditional fuel types. The worldwide continued utilization of fossil fuels has in turn increased the environmental pollution which has become a threat to human kind. For the production of energy the biomass of plants can be used as an alternative source. There is a lot of demand for energy since many years and the biodegradable briquettes are frequently used as an alternate source of energy for small industries and domestic cooking applications. Normally for producing briquettes we follow a process called densification where the waste biomass is densified. This work is a step to deal with energy crisis and effective utilization of agricultural wastes. In this study manual densification of rice husk, saw dust, and coconut shell powder were tested with three different binding agents; dry cow dung, wheat flour, and paper pulp. Briquettes are made using different biodegradable materials and tests were conducted to compare the calorific value of the briquette. Coconut shell powder has been added along with saw dust and other binders which has increased the calorific value of the briquette significantly. It can be stated that briquettes made using the correct mixture of rice husk, saw dust, binders and coconut shell powder possibly will be able to address the energy crisis and environmental issues by increasing the calorific value of the briquettes.
Assessment of atomized water injection in the intake manifold of a heavy duty diesel engine for NOx reduction potential
Authors: Sandeep S , Senthil Kumar D , Krishnan S , Pandey S K
Published: December 2019

Diesel engines, since many years, have found their own market with their robustness, low manufacturing cost and high efficiency. Although diesel engines have so many advantages, they are being blamed for their high pollutant emissions. Main pollutants from diesel engine are NOx, CO, CO2, HC and PM. Out of these pollutants, CO, CO2, HC, and PM can be reduced using some after treatment system in the tail pipe. But NOx needs to be addressed within the cylinder which would reduce the cost of after treatment system. Since NOx formation is the function of high combustion temperature, this temperature should be reduced by some means. In this study, atomized water injection system was employed to reduce in-cylinder combustion temperature there by reducing NOx formation. Here, water was injected into the air-intake pipe along with the EGR stream. 1-D simulation model of the study engine was created using AVL BOOST. Three full load operating points were considered and simulations were performed for 2.8mg, 4mg and 6mg of water injection at each operating points. Performance and emission parameters were then validated with the test data. Results showed that increase in water injection quantity reduces NOx emission but increases the smoke value. 2.8mg of water injection was chosen to be optimum, which reduces about 90°C of in-cylinder temperature, 8-10% of NOx reduction and increases smoke by about 20% from base value.
Ultrasonic characterization of compatible chemicals on waste materials for pre synthesis of microwave absorbing material
Authors: Mishra G R , Nath G , Paikaray R
Published: December 2019

The efficiency of all microwaves absorbing material (MAM)/radar absorbing material (RAM) is purely depend on its composition particularly organic material like carbon and oxygen. The most of the bio waste are rich in cellulose which contains carbon as main component. The treatment of each bio waste is a vital step before fabrication of biomaterial for different application. The present work describes the ultrasonic analysis of treatment of benzyl chloride with aqueous cellulose. The variation of ultrasonic velocity and other acoustic parameters like compressibility and intermolecular free length with increasing concentration of benzyl chloride suggest possible intermolecular interactions. The presences of such interactions are well explained in terms of morphological changes in waste bio material like rice husk. The presence many reaction sites on the treated rice husk makes suitability for synthesis of biomaterial. The SEM of treated rice husk gives significance explanation for absorption of incident microwave radiation incident on the bio material prepared from this waste.
Research of the driven capacity of pushers with rubber pads for oil equipment
Authors: Asheichik Anatoly , Samsonenko Arkadiy
Published: December 2019

The paper discusses the choice of the optimal shape and dimensions of pushers with rubber pads for injection heads intended for pushing cables into an oil well. To optimize the size and shape of the pushers, the finite element method was used. The obtained results were checked experimentally on a specially designed stand. The results of experiments on the evaluation of a number of rubber compositions according to their tribological properties and tractive capacity are presented.
Investigation of cracked rotor analytically and numerically
Authors: Abed Salam Ahmed , Bahrami Mohammad Reza , Thijel Jassim Farij
Published: December 2019

The aim of this paper is analyzing the cracked Jeffcott with an offset disk rotor system. Mathematical modeling of a Jeffcott rotor with a crack while the depths of crack changes allows analyzing the dynamic behavior of the rotor. The effect of changing speeds has been investigated on the dynamic parameters of journal bearings (stiffness and damping) and then on Sommerfeld number. The relation of the dynamic response with the static response of rotor with cracks (dynamic load factor DLF) and with the ratio of depth crack to radius rotor has been found. The results have obtained analytically and numerically by using MATLAB and ANSYS, respectively. The results show when crack’s depths increase the DLF increases and reach to maximum when a/R = 0.8.
Perspectives of application of nanostructured composites for new diagnostic systems for transcranial magnetic stimulation
Authors: Baryshev G , Bozhko Y , Kondrateva A , Konashenkova N
Published: December 2019

The paper presents a study of the prospects for using nanostructured composites for new promising diagnostic systems of transcranial magnetic stimulation. A principle of operation of a new device of transcranial magnetic stimulation using nanostructured composites is proposed. The system wires Cu-Nb are considered as an example of nanostructured composites. The analysis was carried out from the point of view of electrophysical, thermophysical and strength properties. According to the study, conclusions were made about the prospects for using materials of this class as a functional material for a stimulating probe of a portable device of transcranial magnetic stimulation.
Increasing the efficiency of prefabricated drills and the strength of replaceable cutting inserts
Authors: Chernyshov M.O.
Published: December 2019

The results of calculating the stress-strain state in replaceable cutting inserts of assembly tools are presented, using the finite element method. In the calculation, the mechanical characteristics of the tool hard alloy were specified, the conditions for the interaction of the replaceable cutting inserts with the drill body, the fastener elements, the force loading was replaced by the specification of the boundary conditions. As a result, a number of basic sizes of replaceable cutting inserts were built, with different geometric parameters. A system of equations for the calculation of cutting forces for drilling with prefabricated drills of different types has been developed. To determine the influence of the shape of the plates on the stressed state, replaceable cutting inserts of different shapes were studied: trihedral, rhombic, square. A new form of replaceable high-strength cutting inserts with an enlarged angle has been developed. To improve performance, the auxiliary cutting edge of the replaceable cutting insert is made in the form of an arc inscribed in a quarter of the length of the side of the polyhedron, while the radius of the curved cutting edge is equal to half the length of the side of the polyhedron.
Algorithm for computer-aided design of single-line diagrams of 35-220 kV switchgear with one working busbar system using “ORU CAD”
Authors: Varganova A. V. , Panova E. A.
Published: December 2019

Designing distribution systems for substations and power plants is a complex process that requires qualification, attention, knowledge of regulatory and technical documentation and takes a lot of time to perform the same type of work. In addition, an integral part of the preparation and delivery of any project is the development of project documentation, including an explanatory note to the project, specifications and, of course, drawings with single-line diagrams, plans, layout schemes, etc. The paper proposes an algorithm for automated design of single-line circuits of open switchgear 35-220 kV with bus bars, implemented in the original software “ORU CAD”. The study was carried out with the financial support of the Russian Foundation for Basic Research in the framework of the research project No. 18-37-00115.
Problems and perspectives of sustainable marketing development on the Russian food market
Authors: Bozhuk S.G. , Evdokimov K.V. , Maslova T.D. , Pletneva N.A.
Published: December 2019

Nowadays the modern market of food retail is going through a transition period. Consumers tend, on the one hand, to reasonable savings, on the other hand, to meet the need for quality products. Retailers have a difficult task – to follow the concept of sustainable development, while maintaining profitability. The authors of this article, using the methods of content analysis of consumer reviews, observation, online survey, assess the implementation of environmental programs by representatives of retail chains, identify consumer interest in the concept of Zero Waste, and evaluate the satisfaction of the product retail on key attributes.
Vibrations in engineering systems
Authors: Manakova O.S. , Mayorov M.A. , Sidorov A.V.
Published: December 2019

The value of vibration, defined as the oscillatory phenomenon of a solid subjected to the action of force, appeared relatively recently. In fact, mechanical vibration became real only after the industrial revolution. Mechanical oscillatory phenomena, for example, due to working equipment and train movement, began to emerge only by the second half of the eighteenth century. The intensive use of new machines and mechanisms suddenly filled the world, until then, quiet and silent, with new intense noises and vibrations. Different ways of calculating the estimated oscillations of engineering structures, methods of reducing vibrations to the level allowed or their complete isolation, determine the purpose and main problems of the applied theory of mechanical vibrations. In engineering practice, we are almost always interested in predicting the response of a structure or mechanical system to an external effect. For example, we may need to predict the response of a bridge or high-rise building to wind loads, earthquakes, or ground motion. In mechanics and construction, resonant catastrophe describes the destruction of a building or a technical mechanism by induced vibrations at the resonant frequency of a system, which causes its oscillation. Periodic excitation optimally transfers vibration energy to the system and stores it there. Because of this repeated and additional energy input, the system sways more and more until its load limit is exceeded. Frequent reason for these disasters were periodic oscillations of bridges. Periodic fluctuations can be described as a body movement that regularly goes through an equilibrium position. Any oscillatory movement of a mechanical system relative to its equilibrium position is called vibration.
Risk management technique for the QMS processes at the university
Authors: Aleksandrova T.A. , Novikova V.N.
Published: December 2019

This paper considers a risk management technique designed for educational performance of the university, because focus on risk management has become one of the ultimate principles of the new version of ISO 9001. The conclusion of the article: it is makes good sense managing both internal and external risks of the educational performance of the university.
Quality function deployment as a tool of risk management at early stages of an unmanned aircraft design
Authors: Filippova Tatyana S
Published: December 2019

This paper is devoted to quality management of a high-tech product at the design stage. The object of study is a multipurpose High Altitude Long Endurance Unmanned Aerial Vehicle (HALE UAV). Quality management is supposed to be implemented through such a tool as quality function deployment (QFD). The article provides a detailed description of this method and gives an example of its use at the stage of conceptual design of a HALE UAV.
Modeling of added value of high-tech industries based on aluminium
Authors: Vasilyeva Z.A. , Moskvina A.V. , Filimonenko I.V. , Likhacheva T.P.
Published: December 2019

The article proposes a model for assessing the efficiency of the cluster to predict the potential value and structure of value added for promising products and technological chains of their production. The ratio of added value as a result of the cluster operation to the volume of revenue from sales was chosen as the resulting indicator. The choice is due to the possibility of using this ratio as a multiplier of value added. Independent groups of factors - internal (depreciation; payroll; profit) and external market factors determining the upper limit of value added formation (the scale of the national market and the market share controlled by the cluster). Presents major phases in the simulation: predict the relative resultant figure to 2020 based on extrapolating actual values for 2010-2016 for the structure of value added elements (amortization, payroll; profit) and stages of the technological chain of the cluster – production of alumina, production of aluminum and alloys, production of intermediate products, production of final products; assessment of the potential value and structure of value added from the production of promising products in 2020 A mechanism for assessing changes in the value added as a result of management of the value of internal factors at each stage of the technological chain is developed, which allows to optimize management decisions and create alternative scenarios for increasing the added value in the technological chain of the cluster. Testing of the proposed model to estimate the value and structure of value added by types of promising products in the elements of the cluster “Technological valley” in accordance with production scenarios is presented.
Depreciation policy and depreciation fund as indicators of improving equipment efficiency
Authors: Tomshinskaya I N , Syrovatskiy Y Yu
Published: December 2019

Each promising company is required to develop a depreciation policy as part of its investment policy. One aspect of the latter is the depreciation fund. This term is introduced by the authors as one of the tools for improving the efficiency of company management. Depreciation fund assets will be used for the reproduction of fixed assets. Modern accounting standards do not contain these tools, which may have negative consequences.
Quality management during the developing and implementation of the project of integration of automated information systems
Authors: Novikova T B , Bobrova I I , Trofimov E G
Published: December 2019

This article consider the activities of the company engaged in the extraction and transportation of natural gas, in which, today, there is a large fleet of automobile and special equipment and departmental gas stations. The activity of the enterprise is successfully implemented through its existing technical infrastructure. However, during a pre-project survey, the customer identified business processes that need automation, namely, the transfer of information about refueling to waybills. This solution will reduce the waybills processing time and eliminate the inconsistencies about refueling with the data of the existing AIS. This article considers the implementation of only one task: the development of an algorithm for transmitting data on gas stations. The project successfully passed all the necessary tests, after which an act of acceptance of integrated systems into operation was drawn up.
Information support for trade with the use of a conversion funnel
Authors: Sergeev S , Kirillova T
Published: December 2019

A contemporary tendency of providing commercial activity with ways of digital communication is related to solving the problem of online trade forecasting with the help of customers’ feedback. At the same time introduction of e-commerce and wide exploitation of information technologies led to transformation of traditional sales funnel. This work is devoted to the research of the conversion funnel as the next step of leading indicators system’s implementation to the trade activity. The results of elaborated formalized mathematical model are stated, an example of calculation is set. The results of research are aimed to provide managers of commercial enterprises with a convenient method of sales analysis and operating activity’s organization.
Ranking assessment of the competitiveness of agricultural universities
Authors: Klochkov Y. , Akri E. , Samorukov V. , Evdokimov K.
Published: December 2019

Ranking is one of the tools for assessing the competitiveness of universities. There are regional and world rankings of agricultural universities and agricultural sciences. The QS World University Rankings is one of the most influential global university rankings. Only universities that offer all levels of education are included in the QS rating: bachelor’s, master’s and doctoral degrees (or postgraduate studies in Russian practice). At the same time, the university should comprise at least two of the five areas of knowledge: the humanities and arts; engineering and technical sciences; natural sciences; medicine and life sciences; social sciences and management. Evaluation of the best universities in the world in the ranking is based on six criteria: academic reputation (an indicator based on a survey of professors and teachers); reputation among employers (invitations to participate in the survey are sent to companies of all industries ranging in size from one hundred employees and above); the ratio of teaching staff to the number of students (the source of this data is information provided by the universities themselves); citation index (the ratio of the number of published scientific publications to the number of teachers and researchers for whom the university is the main place of work for at least one semester); the proportion of foreign students (reflects the degree of attractiveness of an educational institution in the international arena); the proportion of foreign teachers and scientists (employees who have worked for at least three months, taking into account the percentage of the rate, are taken into account). The article analyzes the methodology of the QS World University Rankings by Subject: Agriculture & Forestry and Veterinary Science. The author gives an assessment of the best universities according to the rating agency QS. The results of this study can be used by top management of agricultural universities in the designing of growth strategy.
Use of the logical-statistical model as a procedure for assessing occupational risks in the OSH management
Authors: Kaverzneva T. , Rumyantseva N. , Uljanov A. , Belina N.
Published: December 2019

There is suggested an analytical approach to occupational safety management based on the use of a logico-statistical model for assessing occupational risks, which allows processing large sets of data for instrumental measurements of labor conditions. The results of processing information on the assessment of working conditions using a logico-statistical model allow us to predict the levels of occupational risks at various workplaces, which makes it possible to develop optimal management decisions for preserving the life and health of workers in enterprises. The prospect of using data mining methods in the tasks of OSH management at the enterprise opens up the possibility of creating decision-making mechanisms that take into considiration the dynamism of the working environment and make it possible to increase the validity of the choice of the priority of labor protection measures.
Calibration of sensors for measurement of high-density heat fluxes
Authors: Korablev V , Gorbunova A , Minkin D , Gumenyuk V , Gumenyuk O
Published: December 2019

Calibration methodology of heat flux sensors for measurement of high-density heat fluxes is suggested. The choice of reference emitter is substantiated and construction of Gardon’s heat flux sensor is described. The difference of suggested heat flux sensor is that it realize indirect measurement of heat flux density, which is based on registration of heating speed of cylinder with high heat capacity and of intensity of heat exchange with its sheath. Three cases of heat flux meter calibration methodology are described: calibration with help of black body model and assistive body with high heat capacity; with help of Stefan-Boltzmann law and black body model; with help of high intensive lamp and assistive body with high heat capacity. Experimental facilitate is suggested and it’s construction is described. Article presents also the results of experimental investigation for each case of calibration methodology. Presented calibration characteristics shows good accordance at wide range of temperatures and heat flux density.
Assessment of the maximum possible number of victims of accidents at hazardous production facilities for insurance purposes
Authors: Borisova M , Byzov A , Efremov S
Published: December 2019

In this article, we will familiarize with the currently used methods of assessing the6 maximum possible number of victims, their analysis and construction of algorithms, followed by a comparison of the results, on the basis of which the most optimal method of assessing the maximum possible number of victims will be chosen. An approach to assessing the maximum number of victims, based on the modeling of the territorial distribution of people within the zone of damaging factors. One of the complex and urgent tasks in the framework of the application of existing approaches to the assessment of the maximum possible number of victims for insurance purposes is the problem of modeling the density of the distribution of people within the zones of the affecting factors. The most adequate approach is based on the discretization of the density over the territory of the site by dividing it into areas, for example, by imposing a certain grid.
Production of formic acid from oil palm empty fruit bunch via dilute acid hydrolysis by response surface methodology
Authors: Harahap A F P , Rahman A A , Sadrina I N , Gozan M
Published: December 2019

Formic acid is the simplest carboxylic acid which has myriad applications in food, textiles, agriculture, pharmaceutics, and chemicals. Formic acid can be synthesized from hydrolysis of lignocellulosic biomass. Oil palm empty fruit bunch (OPEFB) is lignocellulosic biomass produced by oil palm industries to which cellulose content has potential for conversion into formic acid by hydrolysis. We investigated effects of three parameters in acid-catalysed hydrolysis reaction of OPEFB such as reaction time (20, 40, 60 minutes), temperature (140, 160, 180 °C), and H2SO4 concentration (0.3; 0.5; 0.7 M) and optimized them to obtain maximum formic acid concentration by using response surface methodology. Microwave assisted alkaline pretreatment of OPEFB sample under microwave radiation at 840 Watt for 9 minutes with 2% NaOH concentration was done prior to hydrolysis. The pretreatment was effective to reduce lignin content of OPEFB from 28.9% to 7.6%. The highest actual formic acid concentration we obtained from the experiment was 2725 ppm at 180 °C, 60 minutes reaction time, and 0.5 M H2SO4. While according to the polynomial model, the optimal condition for obtaining maximum formic acid concentration of 2890.673 ppm was at 180 °C, reaction time of 60 minutes, and 0.3 M H2SO4.
Optimization of microwave assisted dilute ammonia pretreatment of oil palm empty fruit bunch using response surface methodology
Authors: Rahman A A , Harahap A F P , Sadrina I N , Gozan M
Published: December 2019

Indonesia is the largest producer of palm oil in the world. Around one-fifth of the palm oil processing, weight end up as solid waste, named as oil palm empty fruit bunch (OPEFB). OPEFB is lignocellulosic biomass which contains cellulose, hemicellulose, lignin and minerals. The utilization of cellulose and hemicellulose requires pretreatment to open the lignin bond. This study examines the pretreatment of OPEFB using microwave assisted dilute ammonia. The OPEFB (30 - 40 mesh) was pretreated by ammonia solution with solid-liquid ratio of 1:10 under variated parameters such as ammonia concentration (7.5; 10; 12.5 %), microwave power (280; 560; 840 Watt) and reaction time (3; 6; 9 minutes).The hemicellulose content of all samples was characterized according to SNI 01-1561-1989. The results were optimized using response surface methodology with Box-Behnken model. The model showed that the highest hemicellulose content of 27.3% can be reached at pretreatment conditions of 665-Watt microwave power at 7.5 % ammonia concentration for 3 minutes.
Development of simultant quantification of non-ionic surfactant in chemical flooding using mobile 1H NMR
Authors: Putra I A , Alli Y F , Mujahidin D
Published: December 2019

The injection of surfactant is potential to be lost during the process due to the adsorption of surfactant into the core. It is therefore crucial to analyzed the concentration of surfactant before and after injection to the core. Many methods are developed for determining the content of surfactant using UV-Vis Spectrophotometer by utilizing the chromophore group of the chemical. In this study, quantification of nonionic surfactant that absent of chromophore group was performed using a combination of mobile Nuclear Magnetic Resonance (NMR) with Solid Phase Extraction (SPE). SPE was used to extract the samples that dissolved in water, whereas NMR was used to identify the levels of nonionic surfactants that dissolved in deuterized solvents. Internal standard chemical was added to the sample to verify the concentration of samples. As a stationary phase was SPE C-18 and eluent was methanol, ethyl acetate, and n-hexane. Furthermore, the SPE results were measured using mobile 1H NMR 43 MHz with selected solvents namely deuterated chloroform (CDCl3) and internal standard Dimethyl Formamide (DMF). Optimization results for determination of surfactant concentration up to 0.5% w/w was using the C-18 stationary phase, mobile phase methanol, ethyl acetate, and n-hexane.