bluuebunny/crossref_metadata_2025_split huggingface dataset:
RETRACTED: A dynamic increase in the impact of noise on the human body, in particular, on cardiovascular diseases
Authors: Lekhman M , Shubitidze M , Litvinov A , Zanina I , Pashkova O , Kobzeva N 
Published: January 2021

Abstract
Some manufacturing processes are accompanied by significant noise and vibration. Sources of intense noise and vibration are machines and mechanisms with unbalanced rotating masses, as well as technological installations and apparatuses in which the movement of gases and liquids occurs at high speeds and has a pulsating character. The modern development of technology, equipping enterprises with powerful and fast-moving machines and mechanisms leads to the fact that people are constantly exposed to noise of increasing intensity. Increasing noise and vibration in the workplace has a harmful effect on the human body. As a result of prolonged exposure to noise, the normal activity of the cardiovascular and nervous systems, digestive and hematopoietic organs is disturbed, and professional hearing loss develops, the progression of which can lead to complete hearing loss. Among industrial hazards, noise and vibration occupy one of the leading places among production hazards. The harmful effects of increased noise levels on the human body are well khown, therefore, the relevance of this problem is obvious.
Augmented reality in ophthalmology: development of a software interface for interaction with a virtual reality headset
Authors: Mikhalchuk V D , Epikhin A N 
Published: January 2021

Abstract
This work is devoted to the application of augmented reality in the field of ophthalmology. The paper presents information on image formation and discusses modern technologies used in diagnostics. For a visual demonstration of the possibilities of augmented reality, an application was implemented that allows a person to interact with a virtual reality headset and study the anatomy of the human eye using 3D models. The goal of the project is to develop a training software tool for human interaction with a virtual reality headset for use in the field of ophthalmology. The object of the research is the processes occurring in information systems during the functioning of augmented reality applications. The subject of the research is the functioning of augmented reality applications in the field of ophthalmology.
General model of hydropneumatic suspension for the grain combine harvester adapter
Authors: Kokhanenko V N , Sirotin P V , Evtushenko S I , Kondratenko A I , Maksimov V P 
Published: January 2021

Abstract
The paper presents the hydropneumatic suspension mathematical and simulation model development results for the grain combine harvester adapter. The urgency of the work in connection with the hydropneumatic suspensions spread and the need to increase the system efficiency for field relief copying has been substantiated. A computational model of a hydropneumatic suspension including hydraulic cylinders and hydropneumatic shock absorbers connected in parallel to them, including chokes and gas springs has been presented. A system of equations for the hydraulic cylinder piston motion, depending on the hydropneumatic suspension parameters and the number of the connected hydropneumatic shock absorbers has been presented. On the assumption basis, a simplified diagram of the adapter hydropneumatic suspension with back pressure and the corresponding equation system for determining the hydraulic cylinder piston movement have been drawn up. The model includes changing the parameters of external influence on the system, as well as the hydropneumatic accumulator presetting parameters. To assess the developed model’s performance, its simulation model, which was integrated into the well-known simulation model of the grain combine harvester movement, has been compiled. The modeling results of the combine movement on the field with real geometric evenness parameters have been presented. Based on the simulation results, an oscillogram of the hydraulic cylinder piston movement has been shown, depending on the hydropneumatic accumulators’ settings. Conclusions and directions for further research in this area have been presented.
Selection the measuring system for registering the metal parts temperature at microarc heating and its thermophysical analysis
Authors: Stepanov M S , Koshliakova I G , Sorochkina O Yu , Atoyan T V 
Published: January 2021

Abstract
Measuring the temperature of metal parts during thermal and thermochemical treatment is necessary for the control of the correctness of the technological process. Currently, new methods of thermochemical processing of parts under high-energy conditions, such as microarc surface alloying, are proposed. Heating is carried out by the action of microarc discharges on the surface of parts immersed in coal powder when an electric current flows. It reduces the processing time from a few hours to a few minutes, but makes it difficult to measure the temperature, because heating occurs in dynamic mode. The aim of the work was to select a measuring system for recording the metal parts’ temperature during microarc heating, and the thermophysical analysis of the heating process. The S-type sensor was selected. The measuring system also includes a digital multimeter and a personal computer. The density of the electric current on the surface of the samples was 0.53 A/cm2 The registered heating curve consists of several stages. At the first stage the heating speed was about 8 °C/s. At the second stage it increases to 16 °C/s, but then decreases to 3.5 °C/s. Then the temperature increases monotonously with an average speed of 9 °C/s. At the fourth stage the sample temperature is stabilized at 1250 °C. The thermophysical process’ model of the heating metal parts under the influence of microarc discharges was proposed. The analysis showed that the calculated data coincide with the experimental data.
Cost Assessment of Deloaded Photovoltaic Systems
Authors: Verma Pankaj , Kaur Tarlochan , Kaur Raminder 
Published: January 2021

Abstract
The maximum power point operation of the photovoltaics (PV) restricts them to participate in the frequency regulation of the connected system. Therefore, it is a common practice to deload the PV systems for generating an active power reserve. However, the deloading causes underrating of these systems, hence additional PV panels are installed to overcome the reserved power. Since the frequency regulations can be achieved by using batteries, hence in this paper, the generation cost of a six bus system is minimized by operating PV generator and batteries in coordination with the synchronous generators. The cost curves obtained by operating PV generator with synchronous generators, and batteries with synchronous generators are compared to justify the deloaded operation of PVs. The cost function minimizations are conducted by using the CVX toolbox in the MATLAB software.
Numerical investigation of dynamic behaviour of single and two hinged articulated towers in random sea
Authors: Sreelakshmi G , Somasundaran T P 
Published: January 2021

Abstract
The present paper deals with comparative studies on hydrodynamic behaviour of Single and two hinged articulated towers in Random sea. The dynamic behaviour of towers is investigated under long crested Uni directional random sea and the wave force calculations are performed using Modified Morison equation. A visual based C + + program is developed to evaluate the response of the towers by taking into account non linearities like time variation of submergence, instantaneous tower orientation and hydrodynamic loading. Finally, the equations of dynamic motion are solved using New Mark integration scheme followed by Fast Fourier transform to obtain Power spectral densities. From results, it is observed that presence of intermediate hinges reduced the spectral energy coming on Two hinged articulated tower indicating its significance over Single hinged towers.
Design of a Sliding Mode Controller for a Conical Tank Process
Authors: Praveen Shenoy K , T P Ashwini 
Published: January 2021

Abstract
This paper demonstrates the implementation of a Sliding Mode Controller (SMC) for a First Order System with Time Delay (FOPDT). The transit time/ dead time compensation has been provided to minimize its effect on the related process. The SMC algorithm is implemented on the mathematical model of pilot conical tank system and closed loop system is observed for both servo as well as the regulatory response. The results are investigated for its efficacy and observations have been provided.
Implementation and analysis of Leakage Reduction Techniques in 6T SRAM cell
Authors: Mittal Deepak , Tomar V.K. 
Published: January 2021

Abstract
Leakage power dissipation is the dominating parameter while calculating in total power consumption of CMOS circuits specially in SRAM cells at 90 nm technology. In modern System on chips (SOCs), SRAM plays an important role because 70 to 80 percent area of any SOC is occupied by memory. So it is important to take care of leakage power dissipation and delay of memory based circuits. In this research paper, SRAM cell with hybrid Sleepy Keeper and Stack approach is proposed to optimize both the above parameters. SRAM cell using hybrid Sleepy Keeper and Stack approach leakage power consumption is 49.9 percent less and its dynamic power dissipation is 28% to 53% less as correlated to other implemented approaches. Read delay and power delay product of SRAM cell with hybrid Sleepy Keeper and Stack approach is less as compared to SRAM cell with Sleepy keeper and SRAM cell using Variable body biasing approach but these parameters value are more as correlated to conventional 6T SRAM cell and SRAM cell using stack approach.
Design of Circular Polarized Patch Antenna for NaviC Receiver Applications
Authors: Singh Jaget , Lohar Fateh Lal , Sohi B.S. 
Published: January 2021

Abstract
In this paper, a circular polarized patch antenna at NaviC and S-band is presented for Indian Regional Navigational Satellite System (IRNSS) receiver applications. For this application proposed antenna is satisfying the criteria of circular polarisation with a bandwidth of 2477 MHz to 2508 MHz. The shape of proposed antenna exhibits good gain which is required for the good operation of communication systems for IRNSS. Antenna is operating at frequency of 2492.08 MHz (S-band) with a return loss better than -15 dB and has the stable radiation pattern. For designing of this antenna a conducting patch of 27.5 mm x 27.5 mm and a FR-4 material with thickness of 1.6 mm and dielectric constant of 4.3 is used as a substrate material. In addition to this, the antenna is fed with a coaxial feed technique and matched with 50 Ω input impedance of antenna. The parameters like radiation pattern, VSWR, E field, gain and axial ratio are analysed and achieved by CST studio Suite.
Enhancing the storage capacity by utilizing vertical space using mezzanine flooring in a small-scale industry
Authors: Mukunda Akhila , Anjulakshmi K , Kulkarni Sudheer D , T Navya , Shivakumar Roshini Jacintha 
Published: January 2021

Abstract
Storage is an important aspect of every business, thus every company needs to make maximum utilization of their space. However certain industries do not possess the capability to accommodate sufficient materials for production due to certain constraints. The objective of this study is to propose a suitable storage solution for a small-scale industry, while taking into consideration all these constraints. In the present study it was observed that there was abundant vertical space available which was not being utilized effectively. In order to efficiently utilize the same, various vertical storage solution models were evaluated on selected criteria. Based on the evaluation, mezzanine was found to be the most convenient and feasible solution. A design of mezzanine was proposed working within monetary and space constraints. This model produced additional space which caters to the industry’s needs, hence resolving the storage concerns of the industry.
The analysis of fabricated silicon nanowires with various techniques: a roadmap to energy saving world
Authors: Kashyap Vikas , Chaudhary Neeru , Goyal Navdeep , Saxena Kapil 
Published: January 2021

Abstract
The fabrication of silicon nanowire has been reported in our research study. The synthesis of functionalized-silicon nanowire (f-SiNWs) array which is currently an intense subject of research with its various vast technological applications. We are presenting here SiNW arrays having various applications in electronic and optical devices which were fabricated by a metal-assisted chemical etching (MACE) of silicon (100) wafers. The varying parameter we have taken for the SiNW growth is its etching duration. Analysis of various deposition parameters has been carried out to optimize the growth of SiNW. Surface morphology of etched Si wafer has been carried out by field effect scanning electron microscopy, Photoluminescence (PL) spectroscopy and XRD. For energy saving world the basic stepping stone is Si based nano regime which is emerging vastly on the basis of silicon nanowire. By analyzing the results we reach in the conclusions that with SiNW we will lead to the energy saving era.
Effect of nanoparticles on natural convection in fluids
Authors: Sharma J , Singh M 
Published: January 2021

Abstract
The paper investigates the impact of nanoparticles on the onset of convection currents in a fluid layer under small temperature gradient. The partial differential equations derived from conservation laws of mass, momentum, nanoparticles and energy are considered which include the nano effects (Brownian motion and thermophoresis). Nanoparticle volume fraction is considered to be small in the fluid and hence initial solution of equations assumes it to be constant while temperature and pressure vary in vertical direction. Small perturbations are added to steady state solution and the obtained partial differential equations are converted into ordinary by seeking solution which is exponential in time and periodic in space. To get the complete insight of the problem, variables are not combined or replaced by new ones at any stage leading to more significant expressions. Further, the equations are solved to get thermal Rayleigh number which establishes the influence of physical properties and diffusion effects of nanoparticles on the onset of convection cells. A detailed analysis of the problem is done numerically which lead to significant results and hence affect the convective nature of the system broadly. Copper in spite of having higher conductivity has lesser impact on stability than aluminium because of its higher density.
Three dimensional waves propagation in thermo-viscoelastic medium with two temperature and void
Authors: Sharma K.D. , Kumar Rajneesh , Kakkar Mohit Kumar , Ghangas Suniti 
Published: January 2021

Abstract
A dynamic model comprising anisotropic viscoelastic solid with voids along with two temperature and three phase lag is used to study the propagation of harmonic waves. The system of differential equation is made dimensionless by incorporating suitable quantities. Harmonic type plane wave solution is assumed to determine the Christoffel equation. From this equation five quasi-waves are noticed which vibrate with distinct speed in infinite medium and are under the impact of void, phase lag and viscosity. The velocity and attenuating factors of waves are computed numerically in three dimensional space. The influence of viscosity and void have been seen on the characteristic of waves. Different unique cases are also determined.
Evaluating the performance of method to increase the stiffness of structure
Authors: T P Shivakumara , Sastry Nikhil S , S Kavitha 
Published: January 2021

Abstract
The aim of the present research is to increasing the stiffness of the structure against lateral loading. In the present study to increase stiffness of the structure we have four lateral load resisting elements are considered such as shear wall, core wall, bracing system and tube in tube structure and compare all models with bare frame structure. Here an ordinary moment resisting building of G+13 stories located over a medium soil is considered. In the symmetric building the number of bays will be kept as 5 along both direction and the bay size will be kept as 4m with the storey height being 3m. The building will be analysed considering zone V by response spectra method using ETABS 2016 software. The parameters considered as lateral storey displacement, storey drift, storey shear, storey stiffness, base shear and time period.
Slurry erosion behaviour of HVOF sprayed coatings on hydro turbine steel: A review
Authors: Kumar Rajinder , Bhandari Deepak , Goyal Khushdeep 
Published: January 2021

Abstract
Slurry erosion is one of the unavoidable problems in the operation of hydro power stations all over the world. Erosion mainly depends on the surface properties of the hydro turbine material and the different level of operating parameters like impact angle, impact velocity, slurry concentration, particle size and shape. Thermally sprayed hard metal coatings are widely used to protect components and surfaces against erosion wear in various applications. This study focuses on the slurry erosion behaviour of high velocity oxy-fuel (HVOF) sprayed coatings on hydro turbine steel. The HVOF sprayed coatings such as WC-CoCr, Cr3C2-NiCr, Al2O3, stellite, Cr2O3, Cr3C2–NiCr, NiCrSiB–35wt%WC–Co, WC–10Co– 4Cr and WC-12Co results in high bond strength, lower porosity and high resistance to slurry erosion. In this review paper, comprehensive and significant investigation has been made on existing literature of HVOF sprayed coatings on the material of hydro turbine components. The reported research work reveals that the predominant causes of slurry erosion of the uncoated hydro turbine steel include micro-cutting, micropores, cracks, craters, microchipping, pullout, de-bonding and spalling which can be effectively minimize by applying HVOF sprayed coatings.
Fabrication of E-Glass Fibre Based Composite Material with Induced Particulate Additives
Authors: Seshavenkat Naidu B. , Krovvidi Srinivas 
Published: January 2021

Abstract
A composite material based on E-glass fibre is fabricated with added additives. This fabrication process deals with manufacturing aspects, which are preparing the mould, cutting the fibre, preparing the resin and hardener mixture, adding the additives and final layup for compression. By changing the additive combination, different specimens are made and these specimens are inspected for their heat dispersion quality at high temperatures and durability after the exposure to high temperature. The final result showed the fabrication process was successful as all the fibre layers of the specimens were intact throughout the testing process. The samples with additives graphite, alumina trihydrate and fumed silica showed better structural rigidity even after the exposure to high temperatures.
Study of thermal gradation on creep deformation of non-linear varying functionally graded rotating disc.
Authors: Bose Tania , Gupta Kunjan , Rattan Minto , Chamoli Neeraj 
Published: January 2021

Abstract
Rotating discs working at high temperature finds its application in many dynamic devices like turbo generators, turbojet engines, gas and steam turbine rotors, centrifugal compressors and components like flywheels, gears, etc. and in many such industrial applications. Thus, in the present work, mathematical modeling have been done to investigate the effect of parabolic temperature distribution on secondary stage deformation in non-linear functionally graded composite disc along both radial and tangential directions. Sherby’s law helps to calculate creep behavior of composite rotating disc. MATLAB software is used to model stress and strain rate distributions occurring in composite disc working at different temperature profiles.
Investigating Strength Behaviour of Pond Ash as a Construction fill material
Authors: Randhawa K B S , Chauhan R 
Published: January 2021

Abstract
The use of sustainable materials has become a very important issue for the researchers and geotechnical engineers in construction of embankment for highways. Due to the combustion of coal for producing electricity, enormous amount of fly ash is produced, thus causing a serious threat of disposal and creating environmental and health problems. In India, where land to population ratio is too small, it is very difficult to dispose the fly ash on a huge area of land. So, to tackle the above stated problem, it is very important to utilize the fly ash in such a manner that it does not cause any harm to environment. The aim of this study was to conduct different laboratory tests on cement stabilized pond ash, so that it becomes suitable for geotechnical fill material. Cement was added in pond ash at different proportions and the effect of this addition was studied by analyzing the strength properties of pond ash. Synthetic fiber in the form of polypropylene was added to the optimum mix of cement-pond ash in different proportions. After adding the fiber in the optimum mix, flexural behavior was studied and the failure pattern with and without fiber was observed.
The role of SCM’s on rheology of sprayed mortar
Authors: Bohac M , Kubatova D , Krejci Kotlanova M , Khongova I , Zezulova A , Stanek T 
Published: January 2021

Abstract
The role of various SCM’s on rheology of fresh sprayed mortar was studied. The mix design was inspired by recent trends in SCM’s with use of ground limestone, calcined clays and natural pozzolanas. New formulations were correlated to commonly used SCM’s like blastfurnace slag and fly ash. Sprayed mortar designed mostly for thin profile coatings is demanding material in terms of rheology requiring good adhesion, pumpability, shootability, stability after spraying, low segregation and minimum rebound. Particle packing model was used for sprayed mortar mix design. Time and shear rate dependent rheological parameters were calculated using conventional models to describe the properties of fresh sprayed mortars. A procedure for determining the segregation of the mortar using a rheometer was proposed.
Preparation, manufacture and properties of new β-belite cement
Authors: Kohout J , Koutník P , Soukup A 
Published: January 2021

Abstract
The objective of this work is the optimization of the synthesis of β-belite cement. Belite cement (dicalcium silicate) is a promising material due to a lower CO2 emission and lower energy consumption during its production. Cement with a high content of β-belite was prepared from ground limestone, amorphous silica and alkaline silicate solution. The raw materials were mixed, the mixtures were compacted and then burnt in an electric furnace. Different CaO/SiO2 ratios, firing temperatures, raw materials and firing time were tested. The samples were characterized by XRD, SEM and free lime content. Differences between the cements with high content of β-belite prepared on a laboratory scale (tens of grams) and on a larger scale (tens of kilograms) were studied. Belite cement prepared on a larger scale had better properties compared to a laboratory scale. Optimal synthesis of β-belite cement consisted of mixing ground limestone, silica fume and liquid potassium silicate and burning at temperature 1100°C for more than 2 hours.