bluuebunny/crossref_metadata_2025_split huggingface dataset:
Bifurcation and Stability Analysis of Delayed SIR Model
Authors: Singh Raminder Pal 
Published: June 2022

Abstract
In this paper, an SIR epidemic model is investigated and analysed by incorporating an incubation time delay in identification of infected population. The state variables considered are:susceptible, infected and recovered host individuals. The non-zero interior equilibrium is calculated. By applying the time delay as a bifurcation parameter, the local stability of the endemic equilibrium is studied and the condition which is absolutely stable or conditionally stable is established. Furthermore, a Hopf bifurcation occurs under certain conditions. Numerical simulations are carried out using MATLAB. to illustrate the main results.
Comparison of different laser pulse envelopes with frequency chirp for efficient electron acceleration in vacuum
Authors: Pramanik A K , Ghotra H S , Kant N , Rajput J 
Published: June 2022

Abstract
In the present manuscript, we have investigated the effect of chirped laser pulse envelope to study electron acceleration in vacuum. For this purpose, we have chosen two different pulse shapes, i.e trapezoidal pulse envelope and Sin4 pulse envelope. Electron has been injected axially to the front of the tested envelopes. In all calculations, the front end of each pulse is presumed to have caught up with the electron at t = 0 at the coordinate origin. The relativistic Newton-Lorentz equations of motion of electron in the field of the laser pulse have been analytically and numerically solved. By optimizing laser and frequency chirp parameters, the energy gain of the order of GeV is obtained, and it has been noticed that under the similar range of phases (0 to 2π) and laser intensity parameter (a0 = 3), trapezoidal pulse envelope shows better result than Sin4 pulse envelope on effective electron acceleration in vacuum.
A critical review on basalt fibre geo-polymer concrete
Authors: Pantawane Rashmi , Sharma Pushpendra Kumar 
Published: June 2022

Abstract
Concrete has very less tensile strength as no reinforcement is included in its components. To increase the strength of concrete, fibers are added which acts as reinforcementsinto the concrete and basalt fibers is one of them. This paper reviews the necessity of this fiber to enhance the basic properties of the concrete. Fibers also tends to modify the physical properties of concrete as well as the hardened properties. Basalt fibers are derived from igneous rocks which makes them free from any chemical and thermal reactions. Basalt fibers have found to increase the mechanical properties of the concrete. The physical properties such as setting times have been found to increase with the increase in the fraction in volume of the fibers, dry shrinkage and workability have been found to be reduced in the concrete. Basalt fibre have proven to be efficient reinforcement material in the concrete, providing long life to the concrete. This paper will enrich the domain of structural engineering and contribute a lot to the future researchers working on fiber reinforced concrete at a glance.
Study of growth rate of backward Raman scattering in plasma with density ripple
Authors: Ali Abdirahman Haji , Kamboj Oriza , Kant Niti 
Published: June 2022

Abstract
The recent studies proved that stimulated backward Raman scattering of a laser is affected significantly by the existence of magnetic field and density rippled plasma. At lower hybrid frequencies, the localized radial and azimuthal modes can be supported by the magnetized plasma. The density ripple interacts with the Raman process’s main Langmuir wave, producing in a secondary Langmuir wave with a higher wave number that is highly Landau damped on the electrons. Numerically, the influence of various modes on the growth rate revealed that the ripple and local effects greatly decrease the growth rate of stimulated Raman backscattering. As a result, the Raman process is controlled by the magnetized density rippled plasma and the growth rate is reduced significantly.
Role of titanate-based perovskites in solar water splitting: an overview
Authors: Amika  , Sharma Rajesh , Sharma Ajit , Chandrani Ankush , Singh Jashanpreet , Kumar Deepak 
Published: June 2022

Abstract
Currently, for energy requirement, mainly dependent on fossil fuels which have harmful effects on environment. There is an urgent requirement of alternative energy source. Solar energy is particularly attractive due to cleanliness and inexhaustible nature. The utilization of solar energy is being intensively studied worldwide. Solar water splitting is an encouraging strategy for feasible production of renewable hydrogen. For solar water splitting there is need of non-toxic, low cost, efficient and stable photocatalyst. Recently, titanate-based perovskite photocatalysts have attracted attention for photoelectrochemical water splitting under solar light irradiation. Due to their wide applications, tunable band gap and high photo-corrosion stability titanate-based perovskites are used in hydrogen generation. The main objective of this review is to overview of the recent developments in titanate-based perovskites, their modification and role in hydrogen production under solar light irradiation.
Study of bio-oil production from (Eucalyptus and Plastic) wastes by using the Co-pyrolysis technique: review
Authors: Sharma V , Chouhan A P S , Bisen D 
Published: June 2022

Abstract
This study incorporated the co-pyrolysis of eucalyptus biomass and plastic-wastes for bio-oil production. This study also discussed the advantage and challenges of the used technique for bio-oil production. In conventional pyrolysis process found some drawbacks such as tar content and thermal instability. These issues can be resolved by using the co-pyrolysis technique to meet the modification of the quality and combustion stability of bio-oil. This study also promotes environmental safety by reducing the carbon level from the atmosphere by using solid wastes (eucalyptus wood and plastic-wastes).
Effect of wiggler magnetic field on harmonic generation at metallic surface
Authors: Dua Harleen Kaur , Kant Niti , Thakur Vishal 
Published: June 2022

Abstract
Second harmonic generation induced by surface plasma wave at the metal-semiconductor interface has been investigated. A thin layer of metals like Cu and Al have been considered in attenuated total reflection configuration(ATR) with a thin layer of semiconductor n-InSb over it. The study has been done in the presence of a wiggler magnetic field. The field provides additional momentum to the photons which help to attain phase matching conditions, leading to a resonant process of harmonic generation. Numerical analysis under given conditions show that Cu-InSb is the better choice for the harmonic generation as compared to Al-InSb.
Preparation and Characterization of Vanadium Doped Polyvinylpyrrolidone Nanocomposite
Authors: Bisoyi Sagar , Acharya Aman Deep , Manhas Sandeep S , Ginni  , Sakshi  
Published: June 2022

Abstract
Vanadium Oxides (V2O5) nanoparticles have been prepared by using a simple chemical method. 0.25 wt. % of Vanadium oxides (V2O5) doped Polyvinylpyrrolidone (PVP) (V2O5:PVP) polymer composite prepared by solution casting technique have been characterized for their structural and optical properties. The formation of phase are orthorhombic in structure has been confirmed by X-Ray Diffraction (XRD). The band gap of the composite was determined by using UV-Visible spectroscopy. These outcomes confirmed that the simple synthesis process can be used for the preparation of such composites appropriate for wide range of applications.
Physicochemical Properties of Mango Pulp and Mid-infrared Characterization
Authors: Majumdar A D , Kamboj U , Munjal N 
Published: June 2022

Abstract
Aim of the present study was to predict physicochemical parameters that are ash content, water content and fat content and to predict the presence of different organic molecule in the mango pulp. The prediction for the presence of the organic molecules has been done with the Fourier Transform Infrared Spectroscopy (FTIR). The spectra of mango pulp were measured using FTIR ranging from wavenumber 400 cm-1 to 4000 cm-1. Physicochemical parameters has been analysed with hot air oven, muffle furnace and automated Soxhlet apparatus for moisture content, ash content and crude fat content respectively. This study showed that FTIR spectroscopy has efficiency to distinguish some organic molecules present in the mango pulp.
First-principles calculations on mechanical properties of Rh2MnZn Heusler alloy
Authors: Kaur Navdeep , Srivastava Vipul 
Published: June 2022

AbstractHeusler alloys are a huge family of binary, ternary and quaternary compounds and contain a wide range of unique properties, which made Heusler compounds to be the efficient materials for diverse applications. When it comes to the commercial applications mechanical properties are worth of check on and turn out to be the significant factor in the processing and final use of the materials. These properties make the study proficient by examine the nature of material under external pressure. In this study, we estimated mechanical properties of Rh2MnZn full-Heusler alloy using the full-potential linearized augmented plane wave method (FP-LAPW) method within the density functional theory (DFT). We have obtained C11, C12and C44elastic constants due to cubic symmetry using Charpin method implemented in Wien2k code. Further, using these elastic constants mechanical properties such as bulk modulus, shear modulus, Young’s modulus, Poisson’s ratio, anisotropic factor and Cauchy’s pressure are calculated. These moduli depicted hardness, ductility and elastic anisotropy of the alloy.
Down conversions luminescent properties of Eu doped SrTiO3
Authors: Bakshi Shruti , Rani Suman , Kaur Prabhpreet 
Published: June 2022

Abstract
The work presents down conversion (DC) luminescent properties of pure SrTiO3 (STO) and Eu3+ doped STO prepared by wet chemical reaction sintered at 1100°C. Prepared samples were characterized by FT-IR, UV absorption, XRD, EDX and fluorescent spectroscopy. The FT-IR spectrum of Eu3+ doped STO had absorption bands at 922, 972 and 538 cm-1 indicating the stretching vibration of Sr-O, Eu-O and Ti-O bond, respectively. XRD pattern of SrTiO3 sintered at 1100°C depicted a typical perovskite of cubic symmetry. The EDX spectra confirmed the uniform substitution of Eu3+ in STO. The optical absorption edge of pure SrTiO3 was in UV region. Emission properties were studied by exciting the pure STO and Eu doped STO by 280,325 and 396 nm wavelengths. Eu3+ doping enhanced the emission intensity if STO. Multiple peaks were observed in visible region ranging from 400 to 700m which might be due to defect states present in energy band gap. Therefore visible emissions were obtained from STO and Eu3+ doped STO by exciting with UV light. Visible emission from prepared STO and Eu3+ doped STO powder could be useful in solid state lighting and for display devices.
Coco Peat Organic Manure used as Adsorbents for Dyes Removal
Authors: Shah V U , Hussain S 
Published: June 2022

Abstract
Textile effluents constitute both organic and inorganic constituents and heavy metals which are not economical to treat and hence discharged into water bodies causing water pollution. Methods like ozonation, adsorption, membrane separation, bio sorption, biodegradation, electrochemical degradation, and phytoremediation and H2O2/UV radiation techniques were frequently used for the decolourization of azo dye containing water. Among these aforementioned techniques, the adsorption technique has shown good performance owing to several inherent advantages like high performance, easy handling with no generation of the toxic intermediates. Also dye treatment should be affordable and eco-friendly. Biochar is a sustainable material which can be used for dyes treatment.
In this paper, biochar produced using coconut shell was investigated for the removal of methylene blue as the colouring agent. Batch studies were carried out for decolourization of methylene blue based artificial waste water. Different concentrations of methylene blue from 50-300mg/l was used. The validation of the tests was done using data to fit into the Langmuir isotherms and Freundlich isotherm. The adsorption isotherm was well fitted for Langmuir compared to Freundlich. The KL and KF values were also found.
Study of Molecular interactions of glycols with D-Mannitol at different temperature
Authors: kaur Harsimaran , Patnaik Prachi , Kumar Harsh 
Published: June 2022

Abstract
The density and speed of sound for glycols (EG, DEG, and TEG) in an aqueous solution of D-Mannitol have been measured by Anton Paar DSA 5000M at different temperatures and concentrations. Experimentally obtained data of density and speed of sound are employed to calculate various theoretical parameters such as intermolecular free length, acoustic impedance, adiabatic compressibility, Wada’s constant, Rao’s Constant, and Vander Waal’s constant which gave the better insight into molecular interactions between the glycols and D-mannitol solutions. The linear trend for all the parameters implies the absence of complex formation in the system.
Antibacterial activities of zinc oxide nanoparticles: a mini review
Authors: Kalra Kavita , Chhabra Vandna , Prasad Nupur 
Published: June 2022

Abstract
Highly reactive oxygen species (ROS) are released from the surface of zinc oxide nanoparticles (ZnO NPs) which cause damage to the microorganisms. ROS may break down the cell wall and cell membrane of the bacteria leading to the leakage of cell contents causing their death. Antibacterial effect of ZnO NPs synthesized from plants’ extracts has been seen against several grampositive (Bacillus coagulans, Staphylococcus aureus, Bacillus subtilis) and gramnegative bacteria (Shigella dysenteriae, Sphingomonas paucimobilis, Salmonella typhimurium, Escherichia coli, Bacillus pumilus, Salmonella typhi). Zinc ions (Zn2+) freed from ZnO NPs may attack DNA and proteins of the cell, thus hindering the growth of the bacteria. The negative charge on the surface of some bacteria (E. coli, S. typhi) interacts with positively charged particles in ZnO NPs inhibiting the growth of these bacteria. The rate of antibiotic activity of ZnO NPs depends on size, the concentration of ZnO NPs, and the type of surfactant used in the synthesis of these ZnO NPs. Due to their antibiotic property, ZnO NPs can be used as antibacterial coating of inner surfaces of refrigerators and dishwashers, plastic food containers, in the lining of food cans used for packaging and preservation of food to prevent their spoilage.
Potential solvents and electrolytes for energy storage applications: A Review
Authors: Sharma Chitra , Thakur Ramesh Chand 
Published: June 2022

Abstract
Since the industrial sector leans more on fossil fuels to pace up with the required energy needs. To overcome increasing demand for electricity, it is important to store the energy generated from natural resources so that energy can be used as and when required. Energy storage devices are one such means used worldwide for conserving different forms of energies and need of the hour is to discover and explore strong and secure electrical energy storage technologies. In this review an effort is made to do a comparative analysis of various types of materials and solvents used for energy storage applications during last two decades. Attempt has also been made to explore and discover different class of solvents and electrolytes that are environment friendly and have minimal impact on living organisms. As salts and the solvents are significant ingredients in the energy storage devices, so this analysis will also provide a first-hand perspective of many solvent candidates for energy storage applications. From the analysis and detailed review, it has been observed that the solvents exhibiting large electrochemical window, high thermal and chemical stability, low toxicity, and volatility are the important features which makes them important constituent of different energy storage devices like flow batteries, supercapacitors, and rechargeable batteries. Advancement of cutting-edge battery innovation is important in view of various applications like hybrid cars, smartphones, laptops etc.
Quantitative Estimation of Power Loss in Optical Fiber by Considering the Fresnel Reflection at the Boundaries
Authors: Mukherjee Suman , Hashem Mohammad Yaqubi 
Published: June 2022

Abstract
Optical fiber has become an indispensable tool in our everyday life because of it’s special properties to send light to long distances without losing much of it’s signal power, compared to conventional wire. Although optical fiber is proven to be more efficient and very fast in delivering signal in the area of communication industry, still some losses of signals occur inside the fiber optic cable. Most of the losses have been described in standard text books viz. scattering loss, bending losses, absorption loss etc are pretty straight forward when one calculates the loss of signal power inside an optical fiber. In this article, the loss of signal is calculated and studied by considering Fresnel’s equation (due to Fresnel’s reflection at the boundary) along with absorption loss due to materials property. Although Fresnel’s loss is very small but it could be significant if the fiber connection is thousands of kilometers long and there are multiple joints of different fibers. This Fresnel’s loss only happens at the boundary of a material. For simplicity the loss due to scattering, bending of rays and any other types of losses have been ignore in this work, except absorption loss.
A New Approach to Define Length of Pythagorean Triples and Geometric Series Representation of Set of Pythagorean Triples
Authors: Srinivas Thiruchinapalli , Sridevi K 
Published: June 2022

Abstract
The solutions to the quadratic Diophantine equation
x
2 + y
2 = z
2
are given by Pythagorean Theorem. In this paper, we are revisits well known problem in Number Theory, Set of Pythagorean Triples P = {(
x, y, z
) ∈
Z
3:x
2 + y
2 = z
2
} in different perspective, to define Length of Pythagorean primitive triples and Length of Non primitive triples. Also focused to study Geometric Series representation of Set of Pythagorean triples and its relation with above Length of Pythagorean triples.
Mammogram Image Retrieval System Using Texture and Semantic Features
Authors: Sharma Vipul 
Published: June 2022

Abstract
Image retrieval systems might help radiologists in aiding their diagnostic decision-making by giving a way to discover and identify similar images from databases. Keyword-based search became the dominant paradigm for searching multimedia datasets in the early years of image retrieval. However, using keywords alone has numerous drawbacks: human annotation is time-consuming and intrinsically incomplete, and the relationship between words and concepts is sometimes complicated. These significant challenges have motivated research in the field of Content-Based Image Retrieval (CBIR). However, using visual content has its own set of restrictions, owing to the Semantic Gap, which describes the disparity between low-level information that can be extracted quickly from images and high-level descriptions that are meaningful to users. As a result, a system with integrated approaches is important. In this paper a mammogram image retrieval system based on low level visual features and high-level semantic features has been proposed. Based upon the proposed framework, a prototype of mammogram image retrieval system has been developed. The proposed framework for retrieval of mammograms consists of two phases. The system first exploits the textual features and then further refines the search using visual features. Further, if the user is unsatisfied with the search results, he or she can send Relevance Feedback (RF) to the retrieval system, which has methods to learn about the user’s information needs. A system like this might be utilised for Computer Aided Diagnosis, medical education, and research. The framework established is generalizable and adaptable to a variety of anatomic and diagnostic circumstances. The proposed system’s performance is demonstrated by the experimental findings.
Modelling the Effect of Toxin Producing Prey on Predator Population using Delay Differential Equations
Authors: Kumar Pankaj , Raj Shiv 
Published: June 2022

AbstractA mathematical model is proposed to study the effect of toxin producing prey on predator population using delay differential equations. The associated state variables are Prey populations and predator populations. The assumption is that the toxicity released by prey population adversely affects the predator population. The feasible interior equilibrium is calculated. Hopf bifurcation is observed about the critical value of delay parameter. Analytical findings are supported using MATLAB simulation.
Permanence for an impulsively perturbed periodic single-species model considering Monod-Haldane Type functional response as predation term
Authors: Kalra P , Kaur M 
Published: June 2022

AbstractEvolution of species encounter different sudden short term changes in population density in this ever changing environment. Impulsive differential equations are an appropriate tool to model population ecology. A single-species population model under the influence of constant and linear impulsive perturbations at fixed moments of time is analyzed in which Monod-Haldane functional response is taken as predation term. The conditions required for the permanence of species are established by using comparison analysis technique. To substantiate the theoretical findings, numerical simulation is done using MATLAB.
A semi-automated cleaning system for indoor floor and air quality control
Authors: Roshini Gayatri A , Geethika P , Devika B , Taraka Sai Anil B , Sumalatha A 
Published: June 2022

Abstract
Researchers have found through different tests, that all kinds of harmful substances are present in case of an indoor environment, such as heavy metals, pesticides - these come from household products, toys, carbon dioxide, humidity, etc. People are regularly exposed to these harmful substances through breathing and skin contact. This long-term exposure can affect people’s health very seriously. To achieve a good quality environment indoors, a portable device is proposed here. Through, the development of this device we can monitor indoor air quality, control the indoor air quality and also clean the floor. Monitoring is done by sensors; controlling is performed by a mini air purifier which is attached to a floor cleaner. Whenever the parameters which are received from the sensors are more than the permittable limit then the air purifier starts its operation and stops when the parameters are within the permittable limit, by this process we can reduce the power consumption of the device. The whole device is driven by a battery that can be rechargeable.
A Brief Review of Operator Monotone and Operator Convex Functions
Authors: Agarwal Himanshu , Garg Isha 
Published: June 2022

Abstract
This article is about transient information regarding the functions that satisfy the conditions of monotonicity and convexity on a set, onset of matrices of particular patterns with finite or infinite order called operator monotone or operator convex functions. Data is gathered by investigating numerous existing articles, review papers, publications that show wide scattering in multiple dimensions according to the behavior and prolific results. This work emphasizes not only the origin, key results, and applications of convexity and monotonicity but also their extensions in different directions. It also takes us to the current research scenario in relating fields and may provide an opportunity to express some new ideas, methods, or concepts.