bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on mechanical properties of mortars containing steel shot and sea sand as fine aggregate replacement
Authors: Cabrera H , Daza C , Pacheco-Bustos C , Murillo M 
Published: April 2021

Abstract
In this study, the use of solid waste known in the metallurgical market as steel shot that is generated in the production of metallic elements has been analyzed. Normally the destination of this solid waste is the sanitary landfills of the cities or the security cells since it is classified as hazardous waste. In addition, the use of materials with high availability and that were not previously used in the construction industry, such as sea sand was used in the manufacture of mortar cubes as a fine aggregate. A granulometric analysis of each of the filling materials followed by the casting of 63 mortar cubes with four different fine aggregate replacement ratios (0%, 30%, 70% and 100%) were carried out. After the curing period, the compressive strength and the weight of the resulting mortars have been determined. The results from this study indicated that by completely replacing the fine aggregate with the steel shot waste the density and the compressive strength of the resulting mortars were increased, which indicates that this new material can be used in the construction industry.
ABC recombination model for quantum dot laser
Authors: Karomi Ivan B. , Zakar Ammar T. , Al-Ghamdi Mohammed S. 
Published: April 2021

Abstract
In this paper, we applied the ABC model in quantum dot (QD) semiconductor laser for the first time. We used a 1000μm cavity length InAsP/GaAs quantum dot laser emitting at 761nm, which was improved at Cardiff University. The ABC model is used to estimate the carrier losses that are caused by spontaneous emission and Auger recombination in semiconductor materials. It is shown that the ABC model is applicable in such lasers. The results show that the Shockley-Read-Hall (A) is 2.03 ×l09 sec−1. The radiative coefficient (B) is 2.28 ×l0−14 cm−3 .sec−1 and the Auger recombination (C) is around 8 ×l0−37 cm−6 .sec−1. The results are very close to the actual findings as measured by several different methods. Moreover, the measurement method is feasible, which can pave the path for the use of this procedure to determine the losses mechanism in semiconductor lasers.
Study on mechanical and wear properties of hypereutectic Al-18Si-3.6Cu-0.34Ce alloy
Authors: Gangal Krishnaraddi , Devendra K , Kaggalagowdra Chandrashakar 
Published: April 2021

Abstract
In the present study an effort was made to find the mechanical and wear properties of a heat treatable hyper eutectic aluminium-silicon alloy. The alloy was prepared by conventional casting method in the form of ingots, and then chemical compositions of the alloy analysis are made by spectro spark emission spectrometer. The as cast alloy test samples are T6 heat treated by solutionizing at 500°C for 1h followed by water quenching and isothermal ageing treatment at 210°C for different aging time was achieved. The tensile test was carried out for as cast and cast aged conditions of different aging time of 1h, 3h, 5h and 7h. It was observed from tensile test the ultimate tensile strength of 1h (193.83Mpa) and 3h (168.68Mpa) aged (T6 treated) samples improved the UTS by 22% and 7% respectively as compared to as cast sample (158Mpa). Dry sliding Wear test was conducted at constant sliding speed of 1m/s, 2m/s, 3m/s and 4m/s. with varying load 10-40N. From the dry sliding wear study confirmed that wear rate and coefficient of friction are load dominant, In spite at higher sliding speed and load lower friction was noticed.
Recycled PVC with chicken feathers as bio-load
Authors: Lakhdar Abdelghani , Moumen Aziz , Mansouri Khalifa 
Published: April 2021

Abstract
The poultry industry is responsible for a significant amount of waste. This bio-load is generally transformed into food with low nutritional value, or else incinerated. Not only are these options unsustainable, but it is also a missed opportunity to contribute to the circular economy. In this article, we try to contribute to the development of methods and strategies necessary to transform poultry feathers from waste for disposal into valuable raw materials. The chicken feathers are collected and washed several times, after drying in an oven, and finally crushed to obtain a flour which will be a bio-filler for the PVC used in this flexible article. Different percentages are used to find the one that most improves the mechanical characteristics of recycled PVC. The tensile test is carried out on test specimens made of recycled PVC without additives and recycled PVC reinforced with 5, 10 and 15% chicken feathers. It is deduced from the test results that the value of 10% was the most adequate to improve the mechanical characteristics of recycled PVC.
Towards the Numerical Implementation of Neural Network to Predict the Mechanical Characteristics of Bio Composites
Authors: Laabid Zineb , Moumen Aziz , Lakhdar Abdelghani , Mansouri Khalifa 
Published: April 2021

Abstract
Bio composites are a new category of materials using natural based components in their constituents. The study and simulation of the behavior of these innovative materials occupies an important place in the field of scientific research. Discovering and using new methods has always been the goal of researchers. In recent years, artificial intelligence has been very successful and is used in several fields. it represents a big part of today’s industrial revolution. Smart solutions are more and more favored over conventional solutions as they give more precise results in a short time. We can find them in different sectors, such as banking, commerce, transport and industry, especially in materials science.The intersection of the artificial intelligence with materials engineering, gives extraordinary results. This smart method was able to boost the discovery of new materials, and to solve the most complex problems encountered when determining the mechanical properties of bio composites. What characterizes theEco-composites is their light in weight, their sustainable development, and that they are environmentally friendly. However, the determination of their mechanical properties is not obvious. Certainly, solutions based on homogenization methods or even on the finite element method have given good results, but the complexity of the microstructure of these materials limits the determination of their characteristics. In our paper, we hilight the use of Deep Learning that is an artificial intelligence machine learning method that relies on neural networks to predict the mechanical behavior of a polypropylen bioloaded by the natural fibers.
Removal of CTAB by synthesized ZnO nanoparticles
Authors: Subhashita Mata , Lakshmi Mounika Namballa , Punugoti Thanusha , Kurimilla Divya , Hitesh Akkinenni , Vangalapati Meena 
Published: April 2021

Abstract
In this study, the catalytic mechanism of cetrimonium bromide (CTAB), a cationic surfactant,by pure ZnO nanoparticles was investigated.Further observed ZnO nanoparticles synthesization by precipitation method in aqueous solution with sulfates of metallic precursors.Adding,XRD(X-Ray Diffraction) and SEM(Scanning Electron Microscope) were observed for the crystalline and structural analysis of synthesized ZnO nanoparticles.SEM shows obtained ZnO nanoparticles are of size 180.4 nm.For phase identification o f a crystalline material XRD was used and to observe chemical properties of ZnO nanoparticles,studied FTIR (Fourier Transmission of Infra-Red).The maximum percentage removal of CTAB was found to be 95% by varying different conditions by time,dosage,pH and temperature parameters.
Tribological and Corrosion analysis of Co-20Al-GNSA composites produced through powder metallurgy process
Authors: Raghav G R , Arunachalam U , Sujith R 
Published: April 2021

Abstract
In this study,Co-20Al-GNSA metal matrix composites were produced using mechanical alloying process. The Co-20Al-GNSA composites were mixed using a high-energy ball mill at a constant speed of 350 rpm for 2hours. The composite powders were then characterized for their morphological study using Scanning Electron Microscope. The composite powders are then compressed and sintered at 500MPa and 700°C respectively. The density and compressive strength of the composite materials shows decrement values whereas the wear resistance of the composite materials has increased considerably. The mechanism of wear was identified as abrasive wear. The electrochemical corrosion test also reveals that the Co-20Al-10GNSA composites have better corrosion resistance. The weight-loss corrosion test also shows that the composites with 10GNSA content have better corrosion resistance.
Preparation of superfine cinnamon bark nanocrystalline powder using high energy ball mill and estimation of structural and antioxidant properties
Authors: Archana  , Abhay Aman Kr. , Rakesh Singh Kr. , Nishant Kr. , Birendra Prasad 
Published: April 2021

Abstract
Application of Food material for medicinal use is become a common and safe approach to treat various diseases. Although Nanoscience is seeming to most promising area to be explore at every aspect of existing science including medicine and pharmaceuticals. Medicinal properties and application of various spices are well explored science but their nanopowder synthesis and effect is not very much known. In this present work, we have used a commonly known spice from Indian kitchen know as Cinnamon, for synthesis of nano powder high energy ball mill instrument was used. The crystallographic study, functional group analysis, were done using modern characterization equipment such as XRD (X-ray diffraction), FTIR (Fourier transform infrared spectroscopy), SEM (Scanning Electron Microscope), and UV-Visible spectroscopy. XRD measurement confirms that crystal structure of powder milled for 5 hours and 10 hours were different. Similarly, morphology of differently milled sample found to be different from general Cinnamon powder. This might be due the formation of different fractions of particles were formed as a result of deterioration of cohesion bond due to high energy milling. The present study suggested that cinnamon superfine powder could be a potential source of natural antioxidant and thus could be useful as therapeutic agents and also open new window for the progress of surface science of food materials, which are beneficial for biomedical engineering, pharmaceutical, health, and medicine industries.
Mathematical Analysis of Process Parameters in Drilling of Various Aluminium Matrix Composites Using TOPSIS
Authors: Babu S Senthil , Dhanasekaran C 
Published: April 2021

Abstract
Drilling is one of the major material removal processes to produce holes and the key parameters involved in the process are speed of the drilling tool and feed rate of the tool into the work piece to be machined. A conventional study would include the diameter of the drill bit as a key geometric feature that affects the output parameters: thrust, torque, roundness error and the surface roughness. Drilling experiments are performed on three different hybrid composite specimen of Al6061 alloy. Keeping the diameter constant and by varying the point angle of the tool, drilling is performed and the responses of the output parameters are recorded and tabulated. Using the data from the experiment, analysis of the data is done by one of the multi-criteria decision analysis method, TOPSIS. This method is used to determine the optimal condition to drill a particular specimen of the composite. In TOPSIS method, the data is ranked based on performance of the drill, to find the parameters which are ideal to obtain a hole with minimum roughness, circularity error and thrust force. But it is enough to keep the goal as minimum roughness because the other parameters will invariably get minimized as they are dependent
Re-Design and cost reduction in fabrication of a novel 3 DoF active ankle joint
Authors: Ranjan Ranjeet , Pandey Richa , Suryawanshi Ojas , Kumar Purushottam , Kumar Sushil 
Published: April 2021

Abstract
The mechanism of active ankle is a novel 3 DoF parallel mechanism that operates in an almost spherical manner. It is a project by DFKI Germany and currently it is being used in medical rehabilitation. The project was re-engineered with techniques like CAD and Rapid-Prototyping to reduce the cost of fabrication. In the present paper, a comprehensive study of the design, and fabrication of the active ankle is provided. Various motions of human ankle joint such as adduction-abduction, inversion-eversion, and plantarflexion-dorsiilexion, was achieved by the prototype. This project was modeled in CAD software like SolidWorks, accordingly mounting were prepared for the available motors. Various parts of Active Ankle prototype was printed using Olivetti 3D printer by feeding the .gcode file created by slicing software Cura. The paper also discuss about the integration of Dynamixel motors with MATLAB for control. Finally, the paper talks about various application of parallel manipulator in the area of medical rehabilitation.
Effect of concentration, size, granularity, shear time and temperature on rhological properties of coal water slurries
Authors: Jain Rishi , Yadav Shreyash , Bisht Sachin , Kodavaty Jagadeeshwar , Yatirajula Suresh Kumar 
Published: April 2021

Abstract
Coal water slurries (CWS) were proposed as a substitute for the fuel oils century ago. As there is a huge demand for energy, it is necessary for us to use such concepts with good understanding of the alternative fuels. As the use of CWS depends on physio-chemical properties of coal and rheological properties of the slurry, coal obtained from Dugda coal washery, Jharkand, India were subjected to examination. These coals are ground and segregated according to the sizes and the samples of CWS were prepared. The prepared samples were tested for their physio-chemical properties first. various samples of coal water slurries were prepared and examined for rheology of the samples by varying their concentration, size and granularity of the particles, shearing time and temperature. A detailed analysis on stress strain relation was analyzed during this study. It is found that the stresses would increase with concentration of CWS when the strain rates are varied. It is found that the size of the particles would play active role in deciding the shear forces when the samples were subjected to varying shear rates with their self assembly. The granularity of the particles in the sample has significant effect in rheological properties of the CWS samples. The temperature has no effect.
Comparative analysis on strains in asphalt pavement design using linear elastic and viscoelastic theories
Authors: Mora O , Palomino F , Figueroa M , Borrero D , Castro A , Cordoba C , Heilbron J 
Published: April 2021

Abstract
In Colombia it is common to design pavements using the AASHTO 93 method and to complement it with an elastic analysis of the deformations that cause fatigue and rutting; this has repercussions on the behavior of the structure since it does not take into account the viscoelastic behavior of the asphalt mixtures, In this research, a comparison of three structures at different velocity ranges is made to compare the variation in fatigue and rutting concerning the traditional method of analysis in Colombia and to analyze the differences that may occur in linear elastic analysis and viscoelastic analysis of rutting and fatigue.
Solar Energy Based LED Powered Light and Inverter Circuit with Different Types of Sensors
Authors: Senthil E.Siva , Yogeshwaran R. , Yeshwanth B.S. , Banu S.Saira , Sudhakaraii Ashwin , Sudhakaran Allwin 
Published: April 2021

Abstract
In this article we have designed and constructed a simple yet effective Solar Energy Based LED Powered Light and Inverter Circuit with Different Types of Sensors. The Solar Energy Based LED Powered Light and Inverter Circuit with Different Types of Sensors are constructed using simple electronic components and the voltage vs time graph during the sunny, cloudy, and rainy days are analyzed. The observed values are plotted in graph and the constructed device is found to be working perfectly which shows that the device can be used for various domestic and commercial solar applications.
The Effects of the Preservation Conditions on Physical Properties and Bio-active Substance of Garlic (Allium sativum L.)
Authors: Ngo T C Q , Nguyen D P , Tran V K , Le H D , Pham V T , Tran B L 
Published: April 2021

Abstract
Garlic (Allium sativum L.) is a plant species native to Central Asia and has been widely grown in other regions such as Mediterranean regions as well as Asia, Europe and Africa. Determining the optimal time of storage is very important in maintaining stable garlic agricultural supply chain. In this study, we aim to identify optimal storage conditions and packaging materials that allow maintaining highest nutritional values of garlic. Garlic was harvested and stored at different temperatures and storage time. A wide range of quality parameters of garlic were taken into account including total polyphenol content, total flavonoid content, antioxidant activity, free radical scavenging activity, moisture and weight loss. The results of the study show that, at 0 °C, garlic bulbs showed minimal mass weight loss (0.49%) and stabilized polyphenol content. The change of DPPH free radical activity and the total flavonoid content in garlic bulbs stored under different temperature conditions were minor. Lastly, net cloth packaging introduced favorable loss of weight of garlic bulbs during prolonged storage.
Structural, optical and wettability properties of zirconium oxide thin films deposited at various helium partial pressure
Authors: Patel Nicky P. , Chauhan Kamlesh V. 
Published: April 2021

Abstract
The aim of the present work is to deposit zirconium oxide thin films by reactive magnetron sputtering on glass substrates. The influence of helium partial pressure on structural, optical and wettability properties are investigated. The structural properties were investigated using X-Ray Diffraction, which shows that the films deposited has (111) peak of Zirconium Oxide. The intensity of the peak increased with the increase in helium partial pressure. UV-Vis-NIR spectrophotometer was used to study the optical properties of the films; the deposited films were transparent and had excellent transmittance of 95%. Surface roughness measured was in the range of 20.9nm to 21.8nm, the roughness of the deposited films decreased with increase in helium partial pressure. The wettability property measured using contact angle goniometer had a maximum contact angle of 94.1°, which proves that the deposited film has hydrophobic property when measured using water.
Enhancement of photo luminescent and magnetic properties of surface modified zinc sulphide nanoparticles by manganese doping
Authors: Shaikh I. A. , Raval Adhish V. , Shah D.V. 
Published: April 2021

AbstractIn the current paper we have reported the structural, optical and magnetic properties of manganese doped (1% to 10%) zinc sulphide nanoparticles synthesised by simple chemical co-precipitation method at room temperature. The crystal structure of the synthesised nanoparticles has been confirmed by X-ray diffraction and the average crystallite size calculated by Scherrer formula was about 3.0 nm. A slight quenching in the crystallite size with the doping was also observed. The FESEM images showed spherical shape particles with uniform size distribution. The elemental composition of pure and manganese doped zinc sulphide was confirmed by EDAX attached to FESEM. The UV-Vis spectra has an absorption edge at 321 nm with sharp fall in the absorption confirming the particles of uniform size distribution with no shift in the absorption edge with the doping. The band gap widening was observed (4.4 eV) and the particle size (3.4 nm) calculated was by effective mass approximation. The photoluminescence spectra has wide emission spectra with the peaks at 397 nm, 414 nm and 487 nm with increase in the intensity with the doping concentration giving a peak at 1% of doping and decrease in emission intensity after that. The hysteresis curve shows the ferromagnetism and the saturation magnetisation increases with the doping concentration.
Comparison between Conventional Fast Multipliers and Improved Fast Multipliers using PTL Logic
Authors: Bansal Malti , Bharti Vishal , Chander Vibhor 
Published: April 2021

Abstract
Multiplier circuit is an important element in majority of the arithmetic operations. In the domain of VLSI industry, obtaining low power consumption by the components and high speed has become a crucial concern for the IC designers. It plays a crucial part in the speed of the ALUs and DSP and dissipates an enormous amount of power. Consequently the functioning operation of the desired circuit can be enhanced by its optimization. By using shift and add operation the multiplication process is also implemented in hardware. So we improved the multiplier with the use of efficient adder circuit. In this paper, the circuits are simulated in Cadence Virtuoso using 90nm technology. The proposed array multiplier circuit and Wallace tree multiplier offers a reduction of approximately 56% and 91% in power consumption and approximately 48% and 90% in product of power and delay respectively.
Investigation on Impact and Thermogravimetric Analysis of Aramid and Carbon based Nanocomposites
Authors: Charvani S. , Reddy Ch.Gopal , Narendar G. 
Published: April 2021

Abstract
The demand from industrial sector for light weight and high strength materials is ever increasing. Researchers are trying to fulfil the industrial requirements by fabricating tailor-made materials with required properties. The recent developments in the nanotechnology and nanomaterials have opened new doors in the field of nanocomposites. Nanoparticles are the fascinating materials due to their unique mechanical, thermal and structural properties paved the way for exploring its use in various industrial applications. Nanocomposite materials can be fabricated to modify and control the properties via innovative synthetic approaches. Polymeric nanocomposites combine the lightness and low cost manufacturing of polymers with alumina nanoparticles have high performance properties due to interfacial characteristics of individual constituents, being an attractive alternative to heavier metals or expensive ceramics and other materials.
Researchers are exploring for the enhancement of the properties such as mechanical properties viz., impact strength, tensile strength, flexural strength and thermal stability etc. Nanocomposites are fabricated imbedded with alumina (Al2O3) nanoparticles in to the binding resin matrix and reinforce materials as Aramid fibre, Carbon fibre, and hybrid of Carbon and Aramid fibres. Nanoparticles of Alumina of less than 30 nm size are dispersed in the matrix during preparation of the composites.
Mechanical and structural characterization of polymer nanocomposites with different proportions of nanoparticles, different fibres and also with plain epoxy polymer composite was evaluated. Structural characterisation confirmed the formation of nanocomposites and thermal stability. Mechanical impact test revealed the improved impact resistance of the nanocomposites. The tests established that these nanocomposites exhibited improved properties.