The three-dimensional bioconvective flow of Sisko nanofluid under Robin's conditions
Brownian motion; Gyrotactic microorganisms; Robin's conditions; Sisko nanofluid; thermophoresis
The proposed model investigates three-dimensional bioconvective Sisko nanofluid flow under Robin's conditions. The Sisko nanofluid has versatile implications in drilling fluids, cement slurries, waterborne coatings, and so on. Furthermore, the inclusion of gyrotactic microorganisms prevents the deposition and agglomeration of the nanoparticles in the base fluid. Buongiorno's model is included to explore the behavior of Brownian motion and thermophoretic factors. The energy and mass transmissions along with the gyrotactic microorganism density are illustrated by the partial differential expression system with Robin's conditions. These are further reframed into an ordinary differential equation system with the aid of similarity transformation. The developing model is tackled by using the MAPLE inbuilt package BVP. The nanofluid acts as a goodcooling agent for higher values of the thermophoresis parameter. Furthermore, the pseudoplastic nanofluid performs better than the dilatant nanofluid. The developed model is very useful in energy production and engineering products. 2021 Wiley Periodicals LLC
Puneeth V.; Manjunatha S.; Gireesha B.J.; Shehzad S.A.
Heat Transfer, Vol-50, No. 8, pp. 7632-7653.
https://doi.org/10.1002/htj.22246 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85109664735&doi=10.1002%2fhtj.22246&partnerID=40&md5=1857b2bda6d3590a3dfa35d4c2203138
Puneeth V., Department of Mathematics, CHRIST (Deemed to be University), Bengaluru, Karnataka, India; Manjunatha S., Department of Sciences and Humanities, School of Engineering, CHRIST (Deemed to be University), Bengaluru, Karnataka, India; Gireesha B.J., Department of Studies and Research in Mathematics, Kuvempu University, Shimoga, Karnataka, India; Shehzad S.A., Department of Mathematics, COMSATS University Islamabad, Sahiwal, Pakistan
Acid Orange-7 uptake on spherical-shaped nanocarbons
Acid orange-7(C16H11N2NaO4S); adsorption; biowaste; carbon nanospheres; oil palm leaves
Acid-dyes, typically used in textile productions, could infer poisoning harmful effects on the environment as well as on human health, if not properly treated during their disposal. Henceforth, there is an absolute necessity to achieve new efficient low-cost techniques to remove these dyes from industrial chemical waste. Here, the leaves of oil palm, which are abundant in tropical countries, were used as precursor in the development of carbon nanospheres (adsorbent) to remove hazardous acid Orange-7 (AO-7) dye (C16H11N2NaO4S). The removal efficacy of spherical-shaped nanocarbons was investigated as a function of contact period, by varying their dose (0.5, 1, 1.5, 2 and 2.5mg), pH (acidic, native and basic), and initial AO-7 concentration (10, 15, 20, 25 and 30?M). Amazingly, the oil palm leavesbased carbon nanospheres removed acid-dye up to an efficiency of about 99%. Pseudo second-order kinetics governs the adsorption mechanism and the RedlichPeterson isotherm model fits well to the adsorption results, with regression co-efficient close to unity. This study suggests the importance of natural biowaste-based carbon nanoparticles in sustainable recycling, within the worldwide demanded circular economy. The Author(s) 2021.
Krishnappa B.; Mannekote Shivanna J.; Naik M.; Padova P.D.; Hegde G.
Nanomaterials and Nanotechnology, Vol-11
Krishnappa B., Centre for Nano-materials Displays, B.M.S. College of Engineering, Bengaluru, Karnataka, India, Department of Civil Engineering, B.M.S. College of Engineering, Bengaluru, Karnataka, India; Mannekote Shivanna J., Department of Chemistry, DayanandaSagar College of Engineering, Bengaluru, Karnataka, India; Naik M., Department of Civil Engineering, B.M.S. College of Engineering, Bengaluru, Karnataka, India; Padova P.D., Istituto di Struttura della Materia-CNR (ISM-CNR), Rome, Italy; Hegde G., Centre for Nano-materials Displays, B.M.S. College of Engineering, Bengaluru, Karnataka, India, Centre for Advanced Research and Development, Department of Chemistry, CHRIST (Deemed to be) University, Karnataka, India
Bombay High Court (re)assures that copyright registration is not required to remedy infringement
Sanjay Soya Private Limited v. Narayani Trading Company, Interim Application (L) No. 5011 of 2020 and Commercial IP Suit No. 2 of 2021, High Court of Bombay, Maharashtra, judgment of 9 March 2021, by Mr. Justice G.S. Patel The Bombay High Court, in the case of Sanjay Soya Private Limited v. Narayani Trading Company, held that copyright registration is not a prerequisite to claiming relief in copyright infringement cases. The judgment clarifies the dubiety created previously by a contrary judicial opinion and aligns the Indian position with international copyright principles. 2021 The Author(s) 2021. Published by Oxford University Press. All rights reserved.
Journal of Intellectual Property Law and Practice, Vol-16, No. 10, pp. 1034-1036.
https://doi.org/10.1093/jiplp/jpab136 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85130067096&doi=10.1093%2fjiplp%2fjpab136&partnerID=40&md5=4ea8f7cf728c94eaacd90f7b545c6813
Wadhwa M., School of Law, Christ University; Saidha M.K., School of Law, Christ University
Therapists Issues in Understanding Stuttering
behavioral health; clinician-patient relationship; communication; patient engagement; patient satisfaction; quality improvement; relationships in healthcare
All Open Access; Gold Open Access; Green Open Access
Bagchi U., Department of Psychology, Christ University, Bangalore, Karnataka, India; Reddy K.J., Department of Psychology, Christ University, Bangalore, Karnataka, India
A novel approach in prediction of crop production using recurrent cuckoo search optimization neural networks
Crop production; Data mining; Discrete DBN?VGG Net classifier; Recurrent cuckoo search optimization algorithm
Data mining is an information exploration methodology with fascinating and understand-able patterns and informative models for vast volumes of data. Agricultural productivity growth is the key to poverty alleviation. However, due to a lack of proper technical guidance in the agriculture field, crop yield differs over different years. Mining techniques were implemented in different applications, such as soil classification, rainfall prediction, and weather forecast, separately. It is proposed that an Artificial Intelligence system can combine the mined extracts of various factors such as soil, rainfall, and crop production to predict the market value to be developed. Smart analysis and a comprehensive prediction model in agriculture helps the farmer to yield the right crops at the right time. The main benefits of the proposed system are as follows: Yielding the right crop at the right time, balancing crop production, economy growth, and planning to reduce crop scarcity. Initially, the database is collected, and the input dataset is preprocessed. Feature selection is carried out followed by feature extraction techniques. The best features were then optimized using the recurrent cuckoo search optimization algorithm, then the optimized output can be given as an input for the process of classification. The classification process is conducted using the Discrete DBN? VGGNet classifier. The performance estimation is made to prove the effectiveness of the proposed scheme. 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Rajagopal A.; Jha S.; Khari M.; Ahmad S.; Alouffi B.; Alharbi A.
Applied Sciences (Switzerland), Vol-11, No. 21
https://doi.org/10.3390/app11219816 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85117689718&doi=10.3390%2fapp11219816&partnerID=40&md5=47e62179a726d4af8bde18057f196412
Rajagopal A., Department of Computer Science and Business Systems, Sethu Institute of Technology, Virudhunagar, Kariapatti, 626115, India; Jha S., School of Sciences, Christ (Deemed to be University), NCR?New Delhi Campus, Ghaziabad, 201003, India; Khari M., School of Computer and Systems Sciences, Jawaharlal Nehru University, New Delhi, 110067, India; Ahmad S., Department of Computer Science, College of Computer Engineering and Sciences, Prince Sattam Bin Abdulaziz University, Alkharj, 11942, Saudi Arabia; Alouffi B., Department of Computer Science, College of Computers and Information Technology, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia; Alharbi A., Department of Information Technology, College of Computers and Information Technology, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
A Fusion Based Approach for Blood Vessel Segmentation from Fundus Images by Separating Brighter Optic Disc
blood vessel segmentation; fundus images; image fusion; optic disc
Abstract: In ophthalmology, blood vessel segmentation from fundus images plays a significant role in automated retinal disease screening systems. Several research papers on blood vessel segmentation suggest enhancing fundus images before segmentation significantly to improve performance. The brightness of the optic disc region in a fundus image negatively influences the enhancement of relatively darker vessel pixels. Segregation of brighter optic disc from fundus images before its enhancement is the fundamental idea behind developing the proposed framework. Initially, the optic disc is extracted from the input fundus image to form two images, one containing optical disc and the other, fundus image without optical disk. In the second stage, both the images are enhanced independently, followed by blood vessel segmentation. Finally, the segmented blood vessels from the images are fused to obtain a single image. Experiments conducted with fundus images from DRIVE, STARE, and CHASE_DB1 databases show improvement in the identification of blood vessel pixels. 2021, Pleiades Publishing, Ltd.
Pattern Recognition and Image Analysis, Vol-31, No. 4, pp. 811-820.
Wahid F.F., Department of Information Technology, Kannur University, Kannur, 670567, Kerala, India; Sugandhi K., Department of Information Technology, Kannur University, Kannur, 670567, Kerala, India; Raju G., Department of Computer Science and Engineering, Christ (Deemed to Be University), Kengeri Campus, Bengaluru, 560074, India
Curvit: An open-source Python package to generate light curves from UVIT data
Curvit is an open-source Python package that facilitates the creation of light curves from the data collected by the Ultra-Violet Imaging Telescope (UVIT) onboard AstroSat, Indias first multi-wavelength astronomical satellite. The input to Curvit is the calibrated events list generated by the UVIT-Payload Operation Center (UVIT-POC) and made available to the principal investigators through the Indian Space Science Data Center. The features of Curvit include: (i) automatically detecting sources and generating light curves for all the detected sources and (ii) custom generation of light curve for any particular source of interest. We present here the capabilities of Curvit and demonstrate its usability on the UVIT observations of the intermediate polar FO Aqr as an example. Curvit is publicly available on GitHub at https://github.com/prajwel/curvit. 2021, Indian Academy of Sciences.
Joseph P.; Stalin C.S.; Tandon S.N.; Ghosh S.K.
Journal of Astrophysics and Astronomy, Vol-42, No. 2
Joseph P., Indian Institute of Astrophysics, Bangalore, 560 034, India, Department of Physics, CHRIST (Deemed to be University), Bangalore, 560 029, India; Stalin C.S., Indian Institute of Astrophysics, Bangalore, 560 034, India; Tandon S.N., Inter-University Centre for Astronomy and Astrophysics, Pune, 411 007, India; Ghosh S.K., Tata Institute of Fundamental Research, Mumbai, 400 005, India
Three dimensional mixed convection flow of hybrid casson nanofluid past a non-linear stretching surface: A modified Buongiorno's model aspects
Brownian motion; Casson hybrid nanofluid; Mixed convection; Modified Boungiorno's model; Thermophoresis
The purpose of this study is to determine the role of mixed convection, Brownian motion, and thermophoresis in the dynamics of Casson hybrid nanofluid in a bidirectional nonlinear stretching sheet. For the flow model, a combination of Tiwari and Das models, as well as Buongiornos model, is considered. The thermophysical characteristics of Gr, TiO2, and blood are employed. With the assistance of relevant similarity transformation, the describing flow equations of a Casson hybrid nanofluid model are reformed in the form of a system with a single independent variable. The solution for these equations is obtained using the RKF-45 approach. The velocity, temperature, and concentration fields are visually developed for both linear and non-linear stretching sheets, and the implications of the major parameters are presented in detail. It is clear from the current investigation that heat and mass transfer characteristics of fluid are better in the case of linear stretching than non-linear stretching. Furthermore, the mixed convection parameter is found to enhance the fluid flow velocity. However, the trend is quite opposite in the thermal and concentration fields. Meanwhile, the increase in the yield stress caused due to the rise in the Casson parameter decreases the flow velocity. 2021 Elsevier Ltd
Puneeth V.; Manjunatha S.; Madhukesh J.K.; Ramesh G.K.
https://doi.org/10.1016/j.chaos.2021.111428 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85116074732&doi=10.1016%2fj.chaos.2021.111428&partnerID=40&md5=faf9463fda77dc3331c82df5a891ac33
Puneeth V., Department of Mathematics, CHRIST(Deemed to be University), Bangalore, 560029, India; Manjunatha S., Department of Sciences and Humanities, CHRIST(Deemed to be University), Bangalore, 560074, India; Madhukesh J.K., Department of Mathematics, Davangere University, Davangere, 577002, Karnataka, India; Ramesh G.K., Department of Mathematics, K.L.E Societys J.T. College, Gadag, 582101, Karnataka, India
Biogenic synthesis of Pd-nanoparticles using Areca Nut Husk Extract: a greener approach to access ?-keto imides and stilbenes
An eco-friendly green method for a one-step synthesis of palladium nanoparticles and their synthetic utility are reported. Phytochemicals like amines, alcohols, and phenols present in the Areca Nut Husk extract facilitate the reduction of Pd(ii) to Pd(0). The phytochemicals serve as stabilising agents and ligands for palladium reduction and the need for an external ligand is avoided. The Field Emission Scanning Electron Microscopy and Transmission Electron Microscopy of newly synthesized palladium nanoparticles revealed a spherical morphology. The catalytic activity of the nanoparticles was tested for 1,2-difunctionalization of ynamides, Heck coupling, denitrogenative coupling of phenylhydrazine and C-H arylation of indole. Moreover, catalyst recyclability, control experiments, mechanistic elucidation, and gram-scale synthesis are elaborated. The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2021.
Hegde R.V.; Ghosh A.; Jadhav A.H.; Nizam A.; Patil S.A.; Peter F.; Dateer R.B.
New Journal of Chemistry, Vol-45, No. 35, pp. 16213-16222.
https://doi.org/10.1039/d1nj02858h https://www.scopus.com/inward/record.uri?eid=2-s2.0-85115057694&doi=10.1039%2fd1nj02858h&partnerID=40&md5=fd96960baef404cf1b30c5480003ed5c
Hegde R.V., Dr. R. B. Dateer, Catalysis and Organic Synthesis Group, Centre for Nano and Material Science, Jain (Deemed-to-be University), Jain Global Campus, Jain (Deemed-to-be University) Jakkasandra Post, Ramanagara-562112, Kanakapura, Karnataka, India; Ghosh A., Dr. R. B. Dateer, Catalysis and Organic Synthesis Group, Centre for Nano and Material Science, Jain (Deemed-to-be University), Jain Global Campus, Jain (Deemed-to-be University) Jakkasandra Post, Ramanagara-562112, Kanakapura, Karnataka, India; Jadhav A.H., Dr. R. B. Dateer, Catalysis and Organic Synthesis Group, Centre for Nano and Material Science, Jain (Deemed-to-be University), Jain Global Campus, Jain (Deemed-to-be University) Jakkasandra Post, Ramanagara-562112, Kanakapura, Karnataka, India; Nizam A., Department of Chemistry, CHRIST (Deemed-to-be University), Bangalore-29, Hosur road, Karnataka, India; Patil S.A., Dr. R. B. Dateer, Catalysis and Organic Synthesis Group, Centre for Nano and Material Science, Jain (Deemed-to-be University), Jain Global Campus, Jain (Deemed-to-be University) Jakkasandra Post, Ramanagara-562112, Kanakapura, Karnataka, India; Peter F., Department of Chemistry, CHRIST (Deemed-to-be University), Bangalore-29, Hosur road, Karnataka, India; Dateer R.B., Dr. R. B. Dateer, Catalysis and Organic Synthesis Group, Centre for Nano and Material Science, Jain (Deemed-to-be University), Jain Global Campus, Jain (Deemed-to-be University) Jakkasandra Post, Ramanagara-562112, Kanakapura, Karnataka, India
Design space exploration of optimized hybrid SVPWM techniques based on spatial region for three level VSI
Harmonic distortion; Multilevel inverter (MLI); Space vector PWM (SVPWM); Switching loss; Voltage source inverter (VSI)
The performance of a multilevel inverter depends upon design and selection of an appropriate modulation technique. Space vector pulse width modulation (SVPWM) technique offers more flexibility than other pulse width modulation (PWM) techniques. However, conventional SVPWM technique becomes more complex for multilevel inverter because of increased number of space vectors and redundant switching states. This paper presents a design space exploration method of hybrid SVPWM techniques for three level voltage source inverter (VSI) to reduce total harmonic distortion (THD) and switching loss over wide linear modulation range. A new parameter Harmonic Loss (product of weighted total harmonic distortion factor of the line voltage (Vwthd) and normalized switching loss) is introduced as an objective function, and a spatial region identification algorithm is proposed to determine the optimized switching sequences for hybrid SVPWM technique. Two optimized hybrid SVPWM techniques are proposed based on the optimized switching sequences for three level VSI. The proposed hybrid SVPWM techniques are implemented on a low cost PIC microcontroller (PIC 18F452) and applied on an experimental prototype of three phase three level VSI with an induction motor as load. The experimental results are demonstrated to validate the performance of the proposed hybrid SVPWM techniques. 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature.
Vivek G.; Nair M.D.; Biswas J.; Barai M.
Electrical Engineering, Vol-103, No. 5, pp. 2473-2495.
Springer Science and Business Media Deutschland GmbH
https://doi.org/10.1007/s00202-021-01245-1 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85102049458&doi=10.1007%2fs00202-021-01245-1&partnerID=40&md5=5207f92ca2a9bc3cefabff1b4bea17e8
Vivek G., Propulsion Control Engineer, Bombardier Transportation, Vadodara, Gujarat, India; Nair M.D., Department of Electrical and Electronics Engineering, Karpagam Collage of Engineering, Coimbatore, India; Biswas J., Department of Computer Science, Christ University, Bangalore, India; Barai M., Department of Electrical Engineering, NIT Calicut, Calicut, India
Effect of internal heat source modulations on the onset of triple diffusive convection in viscoelastic liquids
Convection; Internal heat source modulation; Venezian approach; Viscoelastic liquid
The paper aims to study the dynamic behavior of a triple diffusive system subjected to sinusoidal (trigonometric cosine) and non-sinusoidal wave forms (square, sawtooth and triangular) of internal heat source modulation. The configuration of the system is such that a layer of viscoelastic liquid is heated and salted with two solutes from below. An Oldroyd-B type model is made use for viscoelastic liquids. In order to regulate the convection onset, internal heat source modulation is applied. This investigation is modelled using a linear stability analysis where a stationary convection is preferred. Venezian approach facilitates a solution by finding the eigen values of the problem. The influence of pertinent parameters which are varied for a wide range of values have been reported. It is captured via graphs that for small values of frequency of modulation, square wave form is more stable while sawtooth wave form is more stable for an increment in the values of frequency of modulation. Further, liquids such as Newtonian, Maxwell and Rivlin-Ericksen are analysed as the limiting cases of the problem. It seems worthwhile to discuss the results of the present study as it is the first work on linear theory of different wave forms of internal heat source modulation and thus paves a way for new theoretical and experimental endeavors. 2021, National Institute of Science Communication and Information Resources. All rights reserved.
Noor Arshika S.; Tarannum S.; Pranesh S.
Indian Journal of Engineering and Materials Sciences, Vol-28, No. 5, pp. 509-519.
National Institute of Science Communication and Information Resources
Noor Arshika S., Department of Mathematics, CHRIST (Deemed to be University), Bengaluru, 560 029, India; Tarannum S., Department of Professional Studies, CHRIST (Deemed to be University), Bengaluru, 560 029, India; Pranesh S., Department of Mathematics, CHRIST (Deemed to be University), Bengaluru, 560 029, India
Impact of Improved Corporate Governance and Regulations on Earnings Management PracticesAnalysis of 7 Industries from the Indian National Stock Exchange
accounting standards; Companies Act 2013; corporate governance; discretionary accruals; financial sustainability; investment sustainability; Modified Jones model
This study investigates discretionary earnings management practices, tracing the changes over the years in selected top performing and highly liquid listed Indian firms. It empirically measures the impact of corporate governance, financial legislation and global reporting standards on the firms earnings management practices. The study analyses a sample of 712 firm-year data comprising 89 listed Indian companies across 7 different sectoral indices of the National Stock Exchange of India (NSE) over 8 years (20112018). The Modified Jones model was used to compute Discretionary Accruals to measure Earnings Management based on data obtained using Bloomberg terminals. Statistical results and plots generated in Stata offer evidence that instances of earnings management have significantly reduced after the enactment of the Companies Act 2013 and the adoption of Indian Accounting standards which are converged with the IFRS. Findings suggest that services firms are engaging in relatively higher levels of earnings management compared to manufacturing firms. This study reveals the positive impact of improved corporate governance, regulation, and enforcement by significantly reducing the levels of earnings management among listed firms in India. 2021 by the authors.
Journal of Risk and Financial Management, Vol-14, No. 10
Multidisciplinary Digital Publishing Institute (MDPI)
https://doi.org/10.3390/jrfm14100454 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85140605780&doi=10.3390%2fjrfm14100454&partnerID=40&md5=6f9954abbb3719194662a27463c150fd
Thoppan J.J., Saintgits Institute of Management, Kerala, Kottayam, 686532, India; Nathan R.J., Faculty of Business, Multimedia University, Melaka, 75450, Malaysia; Victor V., Department of Economics, CHRIST (Deemed to Be University), Hosur Road, Bangalore, 560029, India, College of Business and Economics, University of Johannesburg, P.O. Box 524, Auckland Park, 2006, South Africa
IndiaEuropean Union Trade Integration: An Analysis of Current and Future Trajectories
Bilateral Trade and Investment Agreement; IndiaEU trade; Poisson Pseudo Maximum Likelihood estimators; Regional trade agreements; Structural gravity model
In a dynamic global environment of increased economic interdependence, nations are more than ever seeking to remove barriers to trade, despite growing trends of protectionism. In this context, India and the EU-27 have initiated talks for the establishment of a Bilateral Trade and Investment Agreement (BTIA) in an attempt to bring their economies together. However, after 16 rounds of negotiations, the failure to conclude this agreement has raised questions regarding the benefits of the agreement to India. This study attempts to examine the current trade scenario and the effects of the proposed regional trade agreement by estimating a structural gravity model. This study employs the Poisson Pseudo Maximum Likelihood (PPML) estimator for analysing the trade-creation and trade-diversion effects of the BTIA to overcome the shortcomings of ordinary least square (OLS) estimators. For the empirical analysis, the merchandise export data from the Gravity database has been taken for a period of 19 years from 2001 to 2019. The results indicate that the BTIA could lead to trade creation and trade diversion, highlighting the need for a re-evaluation of Indias trade policy. JEL Classification: F10, F13, F14, F15, O24 2021 National Council of Applied Economic Research.
Loganathan S.; Karakunnel J.J.; Victor V.
Loganathan S., Swetha Loganathan, Department of Economics, Christ University, India; Karakunnel J.J., Department of Economics, Christ University, India; Victor V., Department of Economics, Christ University, India, College of Business and Economics, University of Johannesburg, Auckland Park, South Africa
A protoberberine alkaloid based ratiometric pH-responsive probe for the detection of diabetic ketoacidosis
Berberrubine; Diabetic ketoacidosis; Fluorescent probe; pH sensor; Ratiometric
Herein we report a ratiometric naturally occurring fluorescent pH probe, berberrubine (BBn) for the direct detection of diabetic ketoacidosis (DKA) conditions of patients having type I diabetes mellitus. The photophysical properties of the probe during pH titrations showed remarkable changes in absorption spectra where two absorption bands at 377 and 326 nm have disappeared followed by the emergence of an absorption maxima at 346 nm in highly acidic conditions. In addition, a fluorescence enhancement effect was observed in the alkaline pH, with a bathochromic shift of 33 nm. Moreover, the solution switches the color from light yellow to light pink with the change of pH from acidic to basic. A pKa value of 7.57 and a good linearity between pH 5.09.0 indicate that the probe can be used efficiently for the DKA condition, where pH variations are in the range of 67. The excellent water solubility, photostability, reversibility, and selectivity of BBn make it a potential pH sensing agent for acidic microenvironments. The reversible sensing of pH variations during DKA could be effective in primary detection and diagnosis which can assist in avoiding further complications of acidosis. 2021 Elsevier Ltd
Meenu M.T.; Cherian A.R.; Sherin D.R.; Nair A.R.; Manojkumar T.K.; Radhakrishnan K.V.; Varghese A.
https://doi.org/10.1016/j.dyepig.2021.109636 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85110060284&doi=10.1016%2fj.dyepig.2021.109636&partnerID=40&md5=b9e85728fd1545295986cd607d8e5515
Meenu M.T., Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram, 695019, India, Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India; Cherian A.R., Department of Chemistry, CHRIST (Deemed to be University), Hosur Road, Bengaluru, 560029, India; Sherin D.R., School of Digital Sciences, Kerala University of Digital Sciences, Innovation and Technology, Thiruvananthapuram, 695317, India; Nair A.R., Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram, 695019, India; Manojkumar T.K., School of Digital Sciences, Kerala University of Digital Sciences, Innovation and Technology, Thiruvananthapuram, 695317, India; Radhakrishnan K.V., Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram, 695019, India, Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India; Varghese A., Department of Chemistry, CHRIST (Deemed to be University), Hosur Road, Bengaluru, 560029, India
Individual effects of four types of rotation modulation on RayleighBard convection in a ferromagnetic fluid with couple stress
couple-stress fluid; ferromagnetic fluid; Lorenz model; rotation modulation
The effect of trigonometric sine, square, triangular, and sawtooth wave types of rotation modulation on RayleighBard convection in a ferromagnetic fluid with couple stress is investigated in this paper using linear and nonlinear analyses. The expression for the critical Rayleigh number and the correction Rayleigh number is deduced from the three-mode linearized Lorenz model using the Venezian approach. The effect of rotation modulation on heat transport is studied using the generalized fifth-order Lorenz model. The study reveals that the Taylor number stabilizes the no-modulation system and decreases the heat transport, and this situation remains so in the presence of rotation modulation. It is found that the effect of all four types of modulation is to stabilize the system and diminish heat transport. It is also observed that the sawtooth wave type of modulation has the least diminishing effect on heat transport and the square wave type of modulation diminishes the most. 2021 Wiley Periodicals LLC
Heat Transfer, Vol-50, No. 7, pp. 6795-6815.
https://doi.org/10.1002/htj.22204 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85108819397&doi=10.1002%2fhtj.22204&partnerID=40&md5=b67ab211608fe2758b4558dd56d95e31
Meghana J., Department of Mathematics, CHRIST(Deemed to be University), Bengaluru, Karnataka, India; Pranesh S., Department of Mathematics, CHRIST(Deemed to be University), Bengaluru, Karnataka, India
Fractional approach for a mathematical model of atmospheric dynamics of CO2 gas with an efficient method
Caputo-Fabrizio derivative; Carbon dioxide gas; Human population; q-Homotopy analysis transform method
In the present work, we find the series solution for the system of fractional differential equations describing the atmospheric dynamics of carbon dioxide (CO2) gas using the q-homotopy analysis transform method (q-HATM). The analyzed model consists of a system of three nonlinear differential equations elucidating the dynamics of human population and forest biomass in the atmosphere to the concentration of CO2 gas. In the current study, we consider Caputo-Fabrizio (CF) fractional operator and the considered scheme is graceful amalgamations of Laplace transform with q-homotopy analysis technique. To present and validate the effectiveness of the hired algorithm, we examined the considered system in terms of fractional order. The existence and uniqueness are demonstrated by using the fixed-point theory. The accomplished consequences illustrate that the considered scheme is highly methodical and very efficient in analyzing the nature of the system of arbitrary order differential equations in daily life. 2021 Elsevier Ltd
https://doi.org/10.1016/j.chaos.2021.111347 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85113422069&doi=10.1016%2fj.chaos.2021.111347&partnerID=40&md5=4ec8830aef62b82d3a8a8d89f16f9c12
Ilhan E., Faculty of Engineering and Architecture, Ahi Evran University, Kirsehir, 40500, Turkey; Veeresha P., Center for Mathematical Needs, Department of Mathematics, CHRIST (Deemed to be University), Bengaluru, 560029, India; Baskonus H.M., Department of Mathematics and Science Education, Faculty of Education, Harran University, Sanliurfa, 63050, Turkey
Entropy generation analysis of tangent hyperbolic fluid in quadratic Boussinesq approximation using spectral quasi-linearization method
convective boundary condition; entropy production; nonlinear Boussinesq approximation; O357.5; spectral quasi-linearization method (SQLM); tangent hyperbolic fluid
In many industrial applications, heat transfer and tangent hyperbolic fluid flow processes have been garnering increasing attention, owing to their immense importance in technology, engineering, and science. These processes are relevant for polymer solutions, porous industrial materials, ceramic processing, oil recovery, and fluid beds. The present tangent hyperbolic fluid flow and heat transfer model accurately predicts the shear-thinning phenomenon and describes the blood flow characteristics. Therefore, the entropy production analysis of a non-Newtonian tangent hyperbolic material flow through a vertical microchannel with a quadratic density temperature fluctuation (quadratic/nonlinear Boussinesq approximation) is performed in the present study. The impacts of the hydrodynamic flow and Newtons thermal conditions on the flow, heat transfer, and entropy generation are analyzed. The governing nonlinear equations are solved with the spectral quasi-linearization method (SQLM). The obtained results are compared with those calculated with a finite element method and the bvp4c routine. In addition, the effects of key parameters on the velocity of the hyperbolic tangent material, the entropy generation, the temperature, and the Nusselt number are discussed. The entropy generation increases with the buoyancy force, the pressure gradient factor, the non-linear convection, and the Eckert number. The non-Newtonian fluid factor improves the magnitude of the velocity field. The power-law index of the hyperbolic fluid and the Weissenberg number are found to be favorable for increasing the temperature field. The buoyancy force caused by the nonlinear change in the fluid density versus temperature improves the thermal energy of the system. 2021, Shanghai University.
Srinivas Reddy C.; Mahanthesh B.; Rana P.; Nisar K.S.
Applied Mathematics and Mechanics (English Edition), Vol-42, No. 10, pp. 1525-1542.
Springer Science and Business Media B.V.
Srinivas Reddy C., Department of Mathematics, Government City College, Hyderabad, 500002, Telangana, India; Mahanthesh B., Department of Mathematics, CHRIST (Deemed to be University), Bengaluru, 560029, India; Rana P., School of Mathematical Sciences, College of Science and Technology, Wenzhou-Kean University, Wenzhou, 325060, China; Nisar K.S., Department of Mathematics, College of Arts and Sciences, Prince Sattam bin Abdulaziz University, Wadi Aldawaser, 11991, Saudi Arabia
Socioeconomic determinants of COVID-19 in Asian countries: An empirical analysis
The spread of coronavirus disease, 2019, has affected several countries in the world including Asian countries. The occurrences of COVID infections are uneven across countries and the same is determined by socioeconomic situations prevailing in the countries besides the preparedness and management. The paper is an attempt to empirically examine the socioeconomic determinants of the occurrence of COVID in Asian countries considering the data as of June 18, 2020, for 42 Asian countries. A multiple regression analysis in a cross-sectional framework is specified and ordinary least square (OLS) technique with heteroscedasticity corrected robust standard error is employed to obtain regression coefficients. Explanatory variables that are highly collinear have been dropped from the analysis. The findings of the study show a positive significant association of per capita gross national income and net migration with the incidence of total COVID-19 cases and daily new cases. The size of net migration emerged to be a potential factor and positive in determining the total and new cases of COVID. Social capital as measured by voters' turnout ratio (VTR) in order to indicate the people's participation is found to be significant and negative for daily new cases per million population. People's participation has played a very important role in checking the incidence of COVID cases and its spread. In alternate models, countries having high incidence of poverty are also having higher cases of COVID. Though the countries having higher percentage of aged populations are more prone to be affected by the spread of virus, but the sign of the coefficient of this variable for Asian country is not in the expected line. Previous year health expenditure and diabetic prevalence rate are not significant in the analysis. Therefore, people-centric plan and making people more participatory and responsive in adhering to the social distancing norms in public and workplace and adopting preventive measures need to be focused on COVID management strategies. The countries having larger net migration and poverty ratio need to evolve comprehensive and inclusive strategies for testing, tracing, and massive awareness for sanitary practices, social distancing, and following government regulation for management of COVID-19, besides appropriate food security measures and free provision of sanitary kits for vulnerable section. 2020 John Wiley & Sons Ltd
Varkey R.S.; Joy J.; Sarmah G.; Panda P.K.
Journal of Public Affairs, Vol-21, No. 4
https://doi.org/10.1002/pa.2532 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85093501033&doi=10.1002%2fpa.2532&partnerID=40&md5=66743020d943b7a794e6f15539a8f411
Varkey R.S., Department of Economics, CHRIST (Deemed to be University), Bengaluru, India; Joy J., Department of Economics, CHRIST (Deemed to be University), Bengaluru, India; Sarmah G., Department of Economics, Central University of Tamil Nadu, Thiruvarur, India; Panda P.K., Department of Economics, Central University of Tamil Nadu, Thiruvarur, India
Radiative heat transfer of nanomaterial on a convectively heated circular tube with activation energy and nanoparticle aggregation kinematic effects
Aggregation of nanoparticles; Binary chemical reaction; Convective boundary condition; Nanoliquid; Response surface methodology; Sensitivity analysis
The improvement of the thermal conductivity of the nanoliquid due to the inclusion of a certain amount of nanoparticles is well known. However, the cause of the observed abnormal improvement remains unclear. For this reason, the aggregation kinematics of nanoparticles is significant for evaluating the appropriate thermal effect of particles at the nanoscale. The scope of nanomaterials can be seen in various engineering and industrial fields such as nuclear reactor coolants, heat exchangers, aircraft coolants, microreactor coolants, automobile radiators, solar collectors, etc. Therefore, this study investigates the effects of the aggregation of nanoparticles on radiative nanoliquid flow with activation energy over a horizontal tube subjected to the convective thermal boundary conditions. Experimentally verified correlations of multiwall carbon nanotube aggregation are utilized. The response surface methodology (RSM) is used to determine the optimum levels of the physical parameters to maximize the mass transfer rate of the nanoliquid. The magnitude of the volume fraction and velocity are superior in the absence of aggregation kinematics than in the presence of nanoparticles aggregation mechanism. From the RSM analysis, the maximum Sherwood number obtained is 1.1384 with desirability d = 0.9993. The present results may have applications in nanoliquid-dependent structures, heating/cooling processes, and thermal systems. 2021 Elsevier Ltd
Mahanthesh B.; Thriveni K.; Rana P.; Muhammad T.
International Communications in Heat and Mass Transfer, Vol-127
https://doi.org/10.1016/j.icheatmasstransfer.2021.105568 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85113360617&doi=10.1016%2fj.icheatmasstransfer.2021.105568&partnerID=40&md5=a6b498579142fb2a21acc2e5da827e17
Mahanthesh B., Centre for Mathematical Needs, Department of Mathematics, CHRIST (Deemed to be University), Bangalore, Karnataka, India; Thriveni K., Centre for Mathematical Needs, Department of Mathematics, CHRIST (Deemed to be University), Bangalore, Karnataka, India; Rana P., School of Mathematical Sciences, College of Science and Technology, Wenzhou-Kean University, Wenzhou, 325060, China; Muhammad T., Department of Mathematics, College of Sciences, King Khalid University, Abha, 61413, Saudi Arabia
Jet-driven AGN feedback on molecular gas and low star-formation efficiency in a massive local spiral galaxy with a bright X-ray halo
Galaxies: active; Galaxies: evolution; Galaxies: jets; Galaxies: kinematics and dynamics; Galaxies: spiral; Galaxies: star formation
It has long been suspected that powerful radio sources may lower the efficiency with which stars form from the molecular gas in their host galaxy, however so far, alternative mechanisms, in particular related to the stellar mass distribution in the massive bulges of their host galaxies, have not been ruled out. We present new, arcsecond-resolution Atacama Large Millimeter Array (ALMA) CO(1-0) interferometry, which probes the spatially resolved, cold molecular gas in the nearby (z=0.08), massive (Mstellar= 4 1011 M?), isolated, late-type spiral galaxy 2MASSX J23453269-044925, which is outstanding for having two pairs of powerful, giant radio jets, and a bright X-ray halo of hot circumgalactic gas. The molecular gas is in a massive (Mgas=2.0 1010 M?), 24 kpc wide, rapidly rotating ring, which is associated with the inner stellar disk. Broad (FWHM=70-180 km s-1) emission lines with complex profiles associated with the radio source are seen over large regions in the ring, indicating gas velocities that are high enough to keep the otherwise marginally Toomre-stable gas from fragmenting into gravitationally bound, star-forming clouds. About 1-2% of the jet kinetic energy is required to power these motions. Resolved star-formation rate surface densities derived from Galaxy Evolution Explorer and Wide-Field Infrared Survey Explorer fall by factors of 30-70 short of expectations from the standard Kennicutt-Schmidt law of star-forming galaxies, and near gas-rich early-type galaxies with signatures of star formation that are lowered by jet feedback. We argue that radio Active Galactic Nucleus (AGN) feedback is the only plausible mechanism to explain the low star-formation rates in this galaxy. Previous authors have already noted that the X-ray halo of J2345-0449 implies a baryon fraction that is close to the cosmic average, which is very high for a galaxy. We contrast this finding with other, equally massive, and equally baryon-rich spiral galaxies without prominent radio sources. Most of the baryons in these galaxies are in stars, not in the halos. We also discuss the implications of our results for our general understanding of AGN feedback in massive galaxies. N. P. H. Nesvadba et al. 2021.
Nesvadba N.P.H.; Wagner A.Y.; Mukherjee D.; Mandal A.; Janssen R.M.J.; Zovaro H.; Neumayer N.; Bagchi J.; Bicknell G.
All Open Access; Green Open Access; Hybrid Gold Open Access
Nesvadba N.P.H., Universitde la Ce d'Azur, Observatoire de la Ce d'Azur, CNRS, Laboratoire Lagrange, Bd de l'Observatoire, CS 34229, Nice Cedex 4, 06304, France; Wagner A.Y., University of Tsukuba, Center for Computational Sciences, Tennodai 1-1-1,Ibaraki, Tsukuba, 305-0006, Japan; Mukherjee D., Inter-University Centre for Astronomy and Astrophysics, Post Bag 4, Pune, 411007, India; Mandal A., Inter-University Centre for Astronomy and Astrophysics, Post Bag 4, Pune, 411007, India; Janssen R.M.J., Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, 91109, CA, United States, Department of Astronomy, California Institute of Technology, 1216 E California Blvd., Pasadena, 91125, CA, United States; Zovaro H., Research School of Astronomy and Astrophysics, The Australian National University, Canberra, 2611, ACT, Australia; Neumayer N., Max-Planck-Institut f Astronomie, Kigstuhl 17, Heidelberg, 69117, Germany; Bagchi J., Department of Physics and Electronics, CHRIST (Deemed to Be University), Hosur Road, Bengaluru, 560029, India; Bicknell G., Research School of Astronomy and Astrophysics, The Australian National University, Canberra, 2611, ACT, Australia